HomeMy WebLinkAbout113752 BT CONSTRUCTION - CONTRACT - CONTRACT - BOBCAT RIDGE ACCESSr
CONSTRUCTION SPECIFICATIONS
FOR
BOBCAT RIDGE ACCESS
ROAD IMPROVEMENTS
City of Fort Collins
JUNE 2006
OWNER: CITY OF FORT COLLINS NATURAL RESOURCES DEPARTMENT
200 WEST MOUNTAIN AVENUE
FORT COLLINS, COLORADO 80522
(970)221-6600
MARK SEARS, P.E.
PROJECT MANAGER
ENGINEER: ANDERSON CONSULTING ENGINEERS, INC.
772 WHALERS WAY, SUITE 200
FORT COLLINS, COLORADO 80525
(970)226-0120
GREG KOCH, P.E.
PROJECT MANAGER
ACE PROJECT NO. COFC2005.08
39344 z:
C�Z *-0
r
THIS PAGE INTENTIONALLY LEFT BLANK
Bobcat Ridge Access Road 01110-4 Summary of Work
Improvements
June 2006
PART 2 MATERIALS
2.01 DUCTILE IRON PIPE AND FITTINGS
A. Specifications
The pipe shall be designed, manufactured, tested, inspected and marked in
accordance with the provisions of this Specification and A.W.W.A. Standard C-151,
"American Standard for Ductile Iron Pipe, Centrifugally Cast in Metal Molds or
Sand -Lined Molds for Water or Other Liquids", except as herein modified.
B. Dimensions
Nominal pipe lengths shall be 18 feet or 20 feet, with shorter lengths provided as
required by Drawings, alignment and profile. Permissible variations in length,
diameter, weight, wall thickness and straightness shall comply with the allowable
tolerances specified in the applicable A.W.W.A. Standards. The minimum finished
inside diameter of the pipe, after lining is placed, shall be as set forth in the
applicable A.W.W.A. Standards.
C. Ductile Iron Pipe Diameter and Pressure Class
Pine Size (inches) Pressure Class
3 through 12 350
14 through 20 250
24 200
30 through 42 150
D. Joint Design and Fabrication
The standard joints shall be push -on rubber gasket joints conforming to
A.W.W.A. Standard C-111. The joint shall be a single rubber gasket joint designed
to be assembled by the positioning of a continuous, molded rubber ring gasket in an
annular recess in the pipe or fitting socket and the forcing of the plain end of the
entering pipe into the socket, thereby compressing the gasket radially to the pipe to
form a positive seal. The joint shall be suitable for a minimum of 250 psi working
pressure.
The manufacturer shall furnish all joint materials including rubber gasket and joint
lubricant. The joint to be used where mechanically restrained joints are required
shall be American Cast Iron Pipe Company's "LOKFAST" joint, U.S. Pipe and
Foundry Company's "T.R. Flex" joint, Clow Corporation's "Super -Lock" joint,
EBBA Iron's "Megalug," Griffin Pipe Products Company's "Snap-Lok" joint, or
approved equal. The mechanical joint restraint shall be designed to resist thrusts
resulting from internal pressure acting at bulkheads, bends, valves and extending
over the distances as shown on the DRAWINGS. The joint restraint shall be
designed for a minimum working pressure of 250 psi. Although thrust blocks may
also be required, joint restraint is to be designed without consideration given to any
support derived from these blocks.
Bobcat Ridge Access Road 02615-2 Ductile Iron Pipe
Improvements
June 2006
Harness rods are to be utilized across closure assemblies in tied sections of the line.
Rods are to be connected to the pipe by the use of mega lugs attached behind bell
and spigot joints. Following installation, the harness rods shall be wrapped with a
layer of protective tape conforming to A.W.W.A. C-209. Design calculations for the
harness rods, are to be submitted to the ENGINEER for approval.
The push -on gasket joint and the harness joint designs shall be submitted to the
ENGINEER for approval.
E. Specials and Fittings
Unless otherwise shown on the Drawings, all specials and fittings shall conform to
the dimensions and requirements of A.W.W.A. Standard C-110. Fittings shall be
designed for 150 psi working pressure and shall have the same lining and coating as
the abutting pipe.
Specials and fittings that cannot be mechanically lined and coated shall be lined and
coated by hand, using the same materials as are used for the pipe and in accordance
with the applicable A.W.W.A. Standards. Coatings and linings applied in this
manner shall provide protection equal to that specified for the pipe. Areas of luting
and coating that have been damaged shall be repaired by hand application in
accordance with applicable A.W.W.A. Standards.
Moderate deflections and long radius curves may be made by means of bends or
fittings, by deflecting straight pipe, by using short lengths of pipe, or by a
combination of any of these methods.
F. Cement -Mortar Lining
Interior surfaces of all pipe, fittings and specials shall be lined in the shop with
cement -mortar in accordance with A.W.W.A. Standard C-104. The cement shall
meet the requirements of "Standard Specifications for Type II Portland Cement",
ASTM Designation C-150. The sand shall conform to that prescribed in A.W.W.A.
C-104. The cement mortar shall contain not less than one part of cement to two
parts of dry sand.
Every precaution shall be taken to prevent damage to the lining. If lining is damaged
or found faulty, the unsatisfactory pipe shall be replaced.
G. Exterior Coating
The outside coating shall be a bituminous coating of either coal tar or asphalt base
approximately 1 (one) mil thick. The finished coating shall be continuous, smooth,
neither brittle when cold nor sticky when exposed to the sun, and shall be strongly
adherent to the pipe.
Bobcat Ridge Access Road 02615-3 Ductile Iron Pipe
Improvements
June 2006
H. Polyethylene Encasement
All ductile iron pipe and fittings shall be polyethylene encased. The polyethylene -�
encasement material shall be manufactured in accordance with A.W.W.A. Standard
C 105-93, 'Polyethylene Encasement for Ductile Iron Pipe Systems" with the
following additional requirements or exceptions.
Material - High density, cross -laminated polyethylene film. The raw material
used to manufacture polyethylene film shall be Type III, Class A, (natural
color) Grade P-33 in accordance with A.S.T.M. Standard Designation D-1248-
89.
2. Physicals - The polyethylene film shall meet the following test requirements:
Tensile Strength 5000 psi minimum
Elongation 100% minimum
Dielectric Strength 800 V/mil thickness minimum
Thickness 0.004" (4 mils) minimum with minus tolerance not
exceeding 10% of nominal thickness
PART 3 EXECUTION
3.01 DUCTILE IRON PIPE INSTALLATION
A. Handling
Ductile iron pipe and fittings shall be handled at all times by lifting with padded
cradles of canvas, leather or other suitable material so as to avoid shock or damage.
Pipe shall be so handled that the coating and lining will not be damaged. If,
however, any part of the coating or lining is damaged, the repair shall be made by
the CONTRACTOR at his expense in a manner satisfactory to the ENGINEER.
Pipe handling equipment is to be approved by the ENGINEER. The use of bare
metal cables, chains, or hooks, etc. will not be permitted.
Stockpiled ductile iron pipe shall be supported on wood blocks and/or sandbags
placed under the uncoated ends of the pipe. Bags shall be of sufficient size to
prevent contact of the pipe coating with the ground or any obstruction. Rolling the
pipe on coated surface will not be permitted. Adequate strutting shall be provided if
necessary to prevent damage to pipe lining and coating.
B. Subgrade
No blocking of pipe will be permitted. Before the pipe is laid, the subgrade shall be
prepared by backfilling with clean uniformly graded sand so as to provide a uniform
and continuous bearing and support for the pipe at every point between bell holes,
except that it will be permissible to disturb or otherwise damage the subgrade
surface over a maximum length of 18-inches near the middle of each length of pipe
by the withdrawal of pipe slings or other lifting tackle.
Bobcat Ridge Access Road 02615-4 Ductile Iron Pipe
Improvements
June 2006
C. Joining Stab Joints
Immediately before joining two lengths of ductile iron pipe, the inside of the bell
end, the outside of the spigot end and the rubber gasket shall be thoroughly cleaned
to remove oil, grit, excess coating, and other foreign matter. The rubber gasket shall
be flexed inward and properly inserted in the gasket recess of the bell socket.
Caution shall be exercised to insure the correct type of gasket is used.
A thin film of gasket lubricant shall be applied to either the inside face of the gasket
or the spigot end of the pipe or both.
The spigot end of the pipe shall be placed in the socket with care to prevent the joint
from contacting the ground. The joint shall be completed by pushing the pipe home
with a slow steady pressure without jerky or jolting movements. Pipe furnished
without a depth mark shall be marked before assembly to assure insertion to the full
depth of the joint. The spigot end of field cut pipe lengths shall be filed or ground to
resemble the spigot end of such pipe as manufactured.
Whenever it is desirable to deflect stab joint pipe in order to form a long radius
curve, the deflection shall not exceed eighty percent (80%) of the pipe
manufacturer's recommendations for maximum deflection.
D. Joining Mechanical Joint Pipe
Before joining mechanical joint ductile iron fittings to the ductile iron pipe, the
outside of the spigot, the inside of the bell and the rubber gasket shall be thoroughly
cleaned to remove oil, grit, excess coating, and other foreign matter.
Normal practice is to lubricate the joint with a soap solution; however, in cold
weather the joint may be assembled dry if approved by the ENGINEER. Extreme
care shall be exercised in making the dry joint.
The ductile iron gland shall be slipped on the spigot end of the pipe with the lip
extension of the gland toward the socket, or bell end. The rubber gasket shall be
placed on the spigot end with the thick edge toward the gland.
The pipe shall be pushed forward until the spigot end fully penetrates the bell. The
gasket shall then be pressed into place in the bell evenly around the entire joint. The
gland shall be moved along the pipe into position for bolting, the bolts inserted, and
the nuts screwed finger tight, then tightened with a torque limiting wrench. The
torque for the various sizes of bolts shall be as follows:
Pipe Size
Bolt Size
Range of Torque
inches
inches
(ft.-lbs.}
2-3
5/8
60
4-24
3/4
75-90
30-36
1
100-120
42-48
1 1/4
120-150
Bobcat Ridge Access Road 02615-5 Ductile Iron Pipe
Improvements
June 2006
Nuts spaced 180 degrees apart shall be tightened alternately in order to produce an
equal pressure on all parts of the gland.
Whenever it is desirable to deflect mechanical joint pipe in order to form a long
radius curve, the deflection shall not exceed eighty percent (80%) of the pipe
manufacturer's recommendations for maximum deflection.
E. Flexible Coupled Joint
When installing flexible steel couplings, care shall be taken that the connecting pipe
ends, couplings and gaskets are clean and free of all dirt and foreign matter with
special attention being given to the contact surfaces of the, pipe, gaskets and
couplings. These couplings shall be assembled and installed in conformity with the
recommendations and instructions of the coupling manufacturer.
Wrenches used in bolting couplings shall be of a type and size recommended by the
coupling manufacturer. Coupling bolts shall be tightened so as to secure a uniform
annular space between the follower rings and the body of the pipe and all bolts
tightened approximately the same amount.
Diametrically opposite nuts shall be tightened progressively and evenly. Final
tightening shall be done with a torque limiting wrench set for the torque
recommended by the coupling manufacturer.
F. Flanged Joint
Before the joint is assembled, the flange faces shall be thoroughly cleaned of all
foreign material with a power wire brush. The gasket shall be centered and the
connecting flanges drawn up watertight without unnecessary stressing of the
flanges. All bolts shall be tightened in a progressive diametrically opposite sequence
using torque wrenches at settings recommended by the manufacturer (75 lb. min.).
Only compressed asbestos sheet gaskets with a rubber compound binder shall be
used. Where steel flanges are connected to ductile iron flanges, an insulating
connection shall be provided.
G. Polyethylene Wrap
Ductile iron pipe and fittings shall be polyethylene encased (cross -laminated HDPE)
in accordance with A.W.W.A. Standard C-105, "Polyethylene Encasement for
Ductile Iron Piping for Water and Other Liquids," and as detailed on the Drawings.
H. Cutting and Fitting
The CONTRACTOR shall make all pipe cuts required to conform to location, line
and grade. All cuts on ductile iron pipe shall be made by the use of pipe cutters or
pipe saws. All cuts shall be straight and true.
3.02 PIPE INSTALLATION - GENERAL
A. Underground Interference
Bobcat Ridge Access Road 02615-6 Ductile Iron Pipe
Improvements
June 2006
A reasonable attempt has been made to locate and identify the underground
interferences to be encountered. However, it shall be the responsibility of the
CONTRACTOR to verify the locations shown on the Drawings. It shall also be the
responsibility of the CONTRACTOR to locate any interference not shown on the
Drawings. The CONTRACTOR shall exercise care when working in order to
protect all underground interference and shall be fully responsible for any and all
damage caused by his operations.
B. Pipe Alignment and Grade
In laying pipe, maximum tolerance is permitted to set line within +/-0.3 foot and
grade within +/-0.1 foot. Fittings, valves and hydrants shall be installed at the
specified locations and elevations, unless written permission to deviate is obtained
from the ENGINEER.
When laying pipe in curves, the intent is to lay to the alignment. The pipe shall be
kept in alignment by deflecting joints, using short lengths or bends.
Any changes in alignment and grade must be authorized by the ENGINEER and
shall be accomplished by the installation of additional fittings, or "breaking" of
joints.
C. Deviation from Alignment and Grade Occasioned by Other Structures
Whenever obstructions, not shown on the Drawings, interfere to such an extent that
an alteration in the Drawings is required, the ENGINEER shall have the authority to
determine the best method of correction. He may change the Drawings and order a
deviation from line and grade, or he may instruct the OWNER to arrange with the
CONTRACTOR to arrange with the owners of the structure for its removal,
relocation or reconstruction, as best fits the economic and field conditions.
D. Temporary Bulkhead
Whenever the pipe is left unattended, temporary plugs shall be installed at all
openings. Temporary plugs shall be watertight and of such design as to prevent
children, animals, or debris from entering the pipe. If water accumulates in the
trench, the plugs shall remain in place until the trench is dry.
E. Connection of Pipelines of Dissimilar Metals
Insulated couplings or insulated flange kits shall be used when joining pipes of
dissimilar metal either above or below grade.
F. Pipeline Marker or Detection Tape
Polyethylene warning tape shall be installed approximately 2 feet below the ground
surface, centered over all buried waterlines.
END OF SECTION
Bobcat Ridge Access Road 02615-7 Ductile Iron Pipe
Improvements
June 2006
PAGE INTENTIONALLY LEFT BLANK.
Bobcat Ridge Access Road 02615-8 Ductile Iron Pipe
Improvements
June 2006
SECTION 02620
LOW PRESSURE PLASTIC PIPE
PART1 GENERAL
1.01 DESCRIPTION
This specification covers the installation and materials for low-pressure plastic pipe 24-inch
diameter and smaller. Pipelines shall be installed in accordance with a design and plan
approved by the responsible technician. Details of construction shown in the design and
plan but not included here shall be considered as a part of this specification. Construction
activities shall be in accordance with applicable OSHA regulations.
PART PRODUCTS
2.01 QUALITY OF PLASTIC PIPE
A. The compound used in manufacturing the pipe shall meet the requirements of one
of the following materials:
Polyvinyl chloride (PVC) as specified in ASTM D 1784 for Type I, Grade 1
or Type I, Grade 2 or Type II, Grade 1.
2. Acrylonitrile-butadiene-styrene (ABS) as specified in ASTM D 1788 for Type
I, Grade 2 or Type I, Grade 3 or Type II, Grade 1.
3. Polyethylene (PE) as specified in ASTM D 1248 for Grade P14, Class C or
Grade P23, Class C or Grade P33, Class C or Grade P34, Class C.
B. Pipe shall have a maximum standard dimension ratio (SDR) of 51. Iron pipe size
(IPS) plastic pipe and I.D. controlled PE pipe meeting one of the following ASTM
specifications are acceptable under this Practice Standard.
ASTM
D 1785
D 2672
D 1527
D2104
D 2239
D 2447
SPECIFICATION
Polyvinyl Chloride Plastic Pipe, Schedule 40, 80 and 120 D 2241
Polyvinyl Chloride Pressure Rated Pipe
Joints for IPS PVC Pipe Using Solvent Cement D 2740 Polyvinyl
Chloride Plastic Tubing
Acrylonitrile-Butadiene-Styrene Plastic Pipe, Schedules 40 and 80
D 2282 Acrylonitrile-Butadiene-Styrene Plastic Pipe
Polyethylene Plastic Pipe, Schedule 40
Polyethylene Plastic Pipe Based on Controlled Inside Diameter
Polyethylene Plastic Pipe, Schedules 40 and 80, Based on Outside
Diameter
Bobcat Ridge Access Road 02620-1 Low Pressure Plastic Pipe
Improvements
June 2006
D 2737 Polyethylene Plastic Tubing
D 3035 Polyethylene Plastic Pipe Based on Controlled Outside Diameter
F 771 Polyethylene Thermoplastic High -Pressure Irrigation Pipeline
Systems
C. Plastic irrigation pipe (PIP) installed under this specification shall be classified as
low -head irrigation pipe meeting the requirements of ASTM D 2241 or of ASTM
D 2282 except that:
1. The outside diameters, wall thicknesses and tolerances in ASAE S376.1
"Design Installation and Performance of Underground, Thermoplastic
Irrigation Pipe" shall apply.
2. The minimum burst pressure requirements for water at 23 degrees C for PVC
1120 and 1220 plastic pipe, SDR 51 is 260 lb/in2 and for ABS plastic pipe
SDR 32.5 and SDR 41 is 380 and 300 lb/in2.
D. Plastic pipe shall be marked with nominal pipe size (for example 10 in), applicable
material designation code (for example PVC 1120), pressure rating for water at 23
degrees C (50 ft head or 22 psi, 50 psi or 63 psi), specification designation with
which the pipe complies and manufacture's name or trademark.
2.02 VALVES AND APPURTENCANCES
A. The pipeline valves and appurtenances shall be of the size, type, material and
pressure rating as shown on the drawings.
B. Unless otherwise shown on the drawings all Butterfly valves shall be equipped with
geared operators.
C. Air and vacuum relief valves and/or combination air and vacuum relief valves shall
be installed at locations shown on the drawings.
D. Pressure relief valves shall be stamped with the pressure at which the valve starts
to open. Adjustable valves shall be sealed or otherwise altered to insure that the
setting marked on the valve is not changed.
E. Check valves shall be rated as quick -closing, non -slamming.
2.03 TESTING
A. When water is available at the time the pipe is installed the system shall be given
an operational test. This test shall consist of filling the pipe with water, taking care
to bleed of any air in the pipe. All of the system components shall operate without
difficulty. Leakage or defects caused by poor materials or workmanship shall be
replaced or repaired. When water is not available to complete a test, the installer
shall provide a guarantee stating they will return and fix leaks that are found when
the pipe is initially filled with water.
Bobcat Ridge Access Road 02620-2 Low Pressure Plastic Pipe
Improvements
June 2006
2.04 GUARANTEE
A. The installing Contractor shall certify that the installation conforms to the
requirements of this specification and furnish a written guarantee protecting the
landowner against defective materials and workmanship for a period of less not
than 1 year. The guarantee will identify manufacturer of pipe and pipe markings.
PART 3 EXECUTION
3.01 TRENCH CONSTRUCTION
A. Trench width at any point below the top of the pipe should be only wide enough to
permit the pipe to be easily placed and joined and to allow the initial backfill
material to be uniformly placed under the haunches and sides of the pipe. The
maximum trench width shall be 36 inches greater than the diameter of the pipe.
The minimum trench width shall not be less than one pipe diameter plus 18 inches,
unless the trench is precision excavated with a semicircular bottom that closely fits
the pipe and the width does not exceed the outside diameter of the pipe by more
than 10 percent. Trench banks that are more than 5 feet high shall be shored or
loped. Refer to Figure 1 for typical trench details.
B. Where rock, hardpan, cobbles or other hard material which might prevent the pipe
from being uniformly supported is encountered in the bottom of the trench, the
trench shall be undercut a minimum of four inches below final grade. The over cut
area of the trench will then be filled with sand or fine-grained soil.
3.02 BEDDING
A. The pipe shall be firmly and uniformly bedded throughout its entire length.
Bedding material shall be placed and spread in uniform layers and in such a manner
as to fill the trench so there are no unfilled spaces below the pipe. For pipe with
bell joints, holes shall be dug in the bedding at the bells to permit the body of the
pipe to be in contact with the bedding along its entire length. Blocking or mounding
shall not be used to bring the pipe up to final grade.
3.03 PIPE INSTALLATION
A. Pipe shall be the diameter, length, material, and pressure class as specified on the
drawings.
B. The pipe shall not be dropped into the trench or handled in a manner to cause
damage. Individual joints of pipe shall be inspected and any damaged pipe shall be
removed and replaced. The pipe will be allowed to come within a few degrees of
the temperature it will have after it is completely backfilled before placing fill other
than that needed for shading or before connecting the pipe to other facilities.
C. Hand, mechanical or water packing are optional methods for placing and
compacting pipe backfill.
Bobcat Ridge Access Road 02620-3 Low Pressure Plastic Pipe
Improvements
June 2006
SECTION 01140
CONTRACTOR'S USE OF PREMISES
PART1 GENERAL
1.01 SECTION INCLUDES
A. The CONTRACTOR may use the OWNER'S property designated within the
construction limits shown on the Drawings for equipment and materials as long as he
confines his operations to those permitted by local laws, ordinance and permits and
meets the following requirements:
Do not unreasonably encumber site with materials or equipment.
2. Assume full responsibility for protection and safekeeping of products stored
on premised.
3. Move any stored products which interfere with operations of the OWNER.
4. Obtain and pay for use of additional storage or work areas needed for
operations.
1.02 LIMITS OF CONSTRUCTION
A. The CONTRACTOR must maintain all of his construction activities within the
OWNER'S property and/or construction easements and limits of the project, or other
stated areas, unless permits and/or written permission are obtained by the
CONTRACTOR, from appropriate authorities or private property owners, outside of
these areas. Contractor to fence all easements and work areas. The temporary
permits must be secured and paid for by the CONTRACTOR at no extra cost to the
OWNER. Any temporary permits secured must be in writing and a copy of same
provided to the ENGINEER.
1.03 SECURITY
A. The CONTRACTOR shall at all times be responsible for the security of his facilities
and equipment. The OWNER will not take responsibility for missing or damaged
equipment, tools, or personal belongings of the CONTRACTOR.
PART 2 PRODUCTS (Not Applicable)
PART 3 EXECUTION (Not Applicable)
IOr IX61-WDOWK13,I
Bobcat Ridge Access Road 01140-1 Contractor's Use of Premises
Improvements
June 2006
3.04 INITIAL BACKFILL
A. Pipe with a pressure rating of less than 50 psi shall be filled with water prior to
placement of backfill materials and maintained near the design working pressure
during the backfilling operations. The initial backfill material shall be soil or sand
that is free from rocks, gravels, frozen materials larger than 1 inch or earth clods
greater than 2 inches in diameter. This may be the on site trench excavated
materials as long as any unsuitable materials are removed. The initial backfill
materials shall be placed in a manner as not to displace, deform or damage the
pipe.
B. When backfilling is done by hand or mechanical means the initial fill shall be
compacted firmly around and above the pipe to achieve a soil density equal or
greater than the density of the undisturbed side walls of the trench. The thickness
of individual lifts prior to compaction shall not exceed 6 inches.
C. When water packing is used, the pipe shall be filled with water. The initial backfill,
before wetting, shall be of sufficient depth to ensure complete coverage of the pipe
with backfill after consolidation has taken place. Water packing shall be
accomplished by adding water to diked reaches of the trench in such quantity as to
thoroughly saturate the initial backfill. After the backfill is saturated, the fill shall
be consolidated by rodding or with a vibrator. The wetted fill shall be allowed to
dry until firm before completing the final backfill. The pipeline shall remain full of
water until after the final backfill is placed.
3.05 FINAL BACKFILL
A. The final backfill material shall be free of rocks, frozen clods or other debris larger
than linch in diameter within 6 inches of the pipe and 6 inches in particle size for
the remaining portion of the final backfill unless otherwise specified on the
drawings. The material shall be placed and spread in approximately uniform layers
so there are no unfilled spaces in the backfill. Rolling equipment shall not be used
until a minimum of 18 inches of compacted backfill material has been placed over
the top of the pipe and then only on pipe having a wall thickness greater than that
of SDR-41. Final backfill may be mounded over the top of the trench above ground
level, but in no case shall the final backfill be lower than the natural ground along
the top of the trench.
B. All special backfilling requirements of the pipe manufacturer shall be followed.
3.06 COVER
A. The minimum depth for backfill over the top of the pipe shall be 30 inches. The
maximum depth for backfill is 4 feet.
B. At low places on the ground surface or at locations where it is shallow to rock,
extra fill may be placed over the pipeline to provide the minimum depth of cover.
In such cases, the top width of the fill shall be no less than 10 feet and the side
slopes no steeper than 6 horizontal to 1 vertical.
Bobcat Ridge Access Road 02620-4 Low Pressure Plastic Pipe
Improvements
June 2006
C. Vertical alignment of pipe shall be uniform and such as to maintain the cover
requirements unless otherwise noted on the drawings. If irregular grades are
required, thrust blocks, air releases, drains and other appurtenances as needed shall
be installed.
3.07 THRUST BLOCKS
A. Thrust blocks shall be formed against a solid trench wall. They shall be of the
minimum size and materials as specified on the drawings.
3.08 JOINTS AND CONNECTIONS
A. All joints and connections shall be constructed to withstand the design working
pressure for the pipeline without leakage and shall leave the inside of the pipeline
free of any obstruction which could reduce the pipe capacity below design
requirements, except that insert fittings for joining PE pipe are permitted.
B. All fittings, such as couplers, reducers, bends, tees and endives shall be made of
material that is recommended for use with the type of pipe specified and shall be
installed in accordance with the recommendations of the pipe manufacturer.
Fittings made of steel or other materials susceptible to corrosion shall (1) be
wrapped with plastic tape meeting the requirements of AWWA C 209 for Type I or
II tape, or (2) coated with coal -tar epoxy paint (Kippers-Bitumastic No. 300-M is
an approved off the shelf product), or (3) painted with one coat of urethane primer
applied at a rate of 2 to 3 mils thick and two or more coats of gloss or semi -gloss
Alkyd Enamel to provide a minimum thickness of 6 mils or (4) coated with epoxy
paint in accordance with the Steel Structures Council (SSPC) Paint Specification #
16.
C. Pipelines with solvent welded joints shall have expansion -contraction couplers as
indicated on the drawings. Couplers shall have a minimum length of 14 inches.
D. Solvent for solvent cement joints shall conform to ASTM D 2564 for PVC pipe
and fittings, to ASTM D 2235 for Acrylonitrile-Butadiene-Styrene pipe and
fittings.
E. Rubber gaskets shall conform to ASTM D 3139.
END OF SECTION
Bobcat Ridge Access Road 02620-5 Low Pressure Plastic Pipe
Improvements
June 2006
THIS PAGE INTENTIONALLY BLANK.
Bobcat Ridge Access Road 02620-6 Low Pressure Plastic Pipe
Improvements
June 2006
SECTION 02710
AGGREGATE BASE COURSE
PART1 GENERAL
1.01 SECTION INCLUDES
A. The worked to be performed includes the preparation of the aggregate base course
foundation; the production, stockpiling, hauling, placing and compacting aggregate
base course.
1.02 RELATED SECTIONS
A. Section 02240 — Water Control and Dewatering
B. Section 02315 — Excavation and Embankment
1.04 SUBMITTALS
A. The CONTRACTOR shall cooperate with the ENGINEER in obtaining and
providing samples of all specified materials. The CONTRACTOR shall submit
certified laboratory test certificates for all items required in this section.
PART PRODUCTS
2.01 MATERIALS
A. Aggregates: Aggregates for bases shall be crushed stone, crushed slag, crushed
gravel or natural gravel that conforms to the quality requirements of AASHTO M
147 except that the requirements for the ratio for the minus No. 200 sieve fraction to
the minus No. 40 sieve fraction shall not apply. The requirements for the Los
Angeles wear test shall not apply to Class 1, 2 and 3. Aggregates for bases shall
meet the grading requirements as called out in the Drawings. The liquid limit shall
be as shown in the table and the plasticity index shall be <_ 6.
Bobcat Ridge Access Road 02710-1 Aggregate Base Course
Improvements
June 2006
2.02
L-1
Note:
Gradations:
Sieve
Designation
Percentage by Weight Passing Square Mesh Sieves
LL<35
LL<30
Class 1
Class 2
Class 3
Class 4
Class 5
Class 6
Class 7
4 inch
---
100
---
---
---
---
---
3 inch
---
95 -
100
---
---
---
---
---
2 1/2 inch
100
---
---
100
---
---
---
2 inch
95 -
100
---
---
100
---
---
---
1 1 /2 inch
---
---
90 -
100
100
---
---
1 inch
---
---
---
---
95 -
100
---
100
3/4 inch
---
---
---
50 - 90
---
100
---
No. 4
30 - 65
---
---
30 - 50
30 - 70
30 - 65
---
No. 8
---
---
---
---
25 - 55
20 - 85
No.200
3-15
3-15
20
max.
3-12
3-15
3-12
5-15
Class 3 materials shall consist of bank or pit run material.
EQUIPMENT
A. General: Equipment shall be capable of legally performing the work as described in
this Specification. Equipment that is inadequate to obtain the results specified shall
be replaced or supplemented as required to meet the requirements of this
Specification.. Any equipment that is used in an improper manner may be cause for
rejection of the work if in the opinion of the ENGINEER the work fails to meet the
requirements of this specification.
Equipment used for compaction shall be the rolling type, vibratory type, or
combination of both types, and shall be of sufficient capacity to meet the compaction
requirements herein.
PART 3 EXECUTION
3.01 PREPARATION OF FOUNDATION
A. The foundation shall be considered to be the finished earth subgrade, subbase course,
or base course, as the case may be, upon which any subbase, base or surface course
is to be constructed.
Preparation of foundation for construction of a subbase, base, or surface course shall
consist of the work necessary to restore, correct, strengthen or prepare the foundation
to a condition suitable for applying and supporting the intended course.
For aggregate base course roads and parking areas, the top six -inches of topsoil shall
be stripped within the area to be aggregate surfaced. Following stripping of the
Bobcat Ridge Access Road 02710-2 Aggregate Base Course
Improvements
June 2006
topsoil, the upper 12 inches of the subgrade shall be scarified and compacted to a
minimum of 95% of the Maximum Standard Proctor Density (ASTM D698). On -
site material may be used as accepted by the ENGINEER, for compacted fill for the
aggregate base course. Fill shall be placed within 2% of optimum moisture content
and compacted to a minimum of 95% of the Maximum Standard Proctor Density
(ASTM D698).
Aggregate base course used as a foundation for pavements shall be placed on the
subgrade within two percent of optimum moisture and compacted to a minimum of
95% of the Maximum Standard Proctor Density (ASTM D698). The top six inches
of topsoil shall be stripped within the area to be aggregate surfaced. Following
stripping of the topsoil, the upper 12 inches of the subgrade shall be scarified and
compacted to a minimum of 95% of the Maximum Standard Proctor Density (ASTM
D698). On -site material may be used, as accepted by the ENGINEER, for
compacted fill for the aggregate base course. Fill shall be placed within 2% of
optimum moisture content and compacted to a minimum of 95% of the Maximum
Standard Proctor Density (ASTM D698). Deviations in aggregate base course under
pavements of more than 1/4 inch in 10 feet, measured with a 10-foot straight edge,
shall be corrected prior to pavement construction.
The foundation shall be prepared and constructed such that it will have a uniform
density throughout. It shall be brought to the required alignment and cross section
with equipment and methods adapted for the purpose. Upon completion of the
shaping and compacting operations, the foundation shall be smooth, at the required
density, and at the proper elevation and contour to receive the aggregate base course.
After the specified compaction has been obtained, the subgrade under the curb,
gutter, sidewalk and pavement shall be proof -rolled with a heavily loaded rubber tire
roller, fully loaded water truck, or other approved equipment. Those areas which
produce a rut depth of over '/z inch or which crack the subgrade after pumping and
rebounding shall be ripped, scarified, wetted or dried if necessary, and recompacted
to the requirements for density and moisture at the CONTRACTOR'S expense.
Where unsuitable material is encountered, the ENGINEER may require the
CONTRACTOR to remove the unsuitable materials and backfill to the finished
grade with approved material. The completed subgrade shall be proof -rolled again
after placement of approved material.
Unless otherwise provided, all holes, ruts and other depressions in the foundation
shall be filled with materials similar to those existing in the foundation. High places
shall be excavated and removed to the required lines, grade and section.
Base course material shall not be placed on a foundation that is soft, spongy, or one
that is covered by ice or snow. Base course shall not be placed on a dry or dusty
foundation where the existing condition would cause rapid dissipation of moisture
from the base course material and hinder or preclude its proper compaction. Dry
foundations shall have water applied and reworked and compacted as necessary.
The ENGINEER shall direct the CONTRACTOR to make minor adjustments in the
finish grade from that shown in the Drawings as may be necessary or desirable to
maintain the characteristics of a stabilized foundation by minimizing the amount of
cutting into or filling.
Bobcat Ridge Access Road 02710-3 Aggregate Base Course
Improvements
June 2006
3.02 EARTH SUBGRADE
A. When the foundation is an earth subgrade it shall be prepared by removing all
vegetation, excavating and removing materials, filling depressions, scarifying,
shaping, smoothing and compacting to meet the required grade, section and density.
Stones over six inches in greatest dimension shall be removed.
3.03 PLACEMENT
A. The aggregate base course shall be constructed to the width and section shown in the
Drawings. If the required compacted depth of base coarse exceeds six inches, the
base shall be constructed in two or more layers of approximate equal thickness. The
maximum compacted thickness of any one layer shall not exceed six inches.
Each layer shall be constructed as far in advance of the succeeding layer as the
ENGINEER may direct. The work shall, in general, proceed from the point on the
project nearest the point of supply of the aggregate in order that the hauling
equipment may travel over the previously placed material, and the hauling
equipment shall be routed as uniformly as possible over all portions of the
previously constructed courses or layers of the base course.
The material shall be deposited on the soil foundation, or previously placed layer in
a manner to minimize segregation and to facilitate spreading to a uniform layer of
the required section. In the event that blending of materials is necessary to provide
required gradation and properties of the material, and is done in the roadway, the
same shall be accomplished by mixing the aggregate and blending material by means
of blade graders, discs, harrows or other equipment to effect a uniform distribution
and gradation throughout the finished mixture. Excessive mixing and grading that
will cause segregation between the coarse and fine materials is prohibited.
3.04 COMPACTION
A. After a layer or course has been placed and spread to the required thickness, width
and contour, it shall be compacted. If the material is too dry to readily attain the
required density, it shall be uniformly moistened to the degree necessary during
compaction operations for proper compaction.
B. Compaction of each layer shall continue until the required density of Section 3.01 is
reached. The surface of each layer shall be maintained during compaction
operations in such a manner that a uniform texture is produced and aggregates firmly
keyed.
All areas where proper compaction is not obtainable due to segregation of materials,
excess fines, or other deficiencies in the aggregate, shall be reworked as necessary or
the material removed and replaced with aggregates that will meet this specification.
The surface of each layer shall be kept true and smooth at all times.
3.05 MIXING
A. General: Unless otherwise specified, the CONTRACTOR shall mix the aggregate
by any one of the three following methods.
Bobcat Ridge Access Road 02710-4 Aggregate Base Course
Improvements
June 2006
1. Stationary Plant Method:
Aggregate base course and water shall be mixed in an approved mixer.
After mixing the aggregate shall be transported to the project site while it
contains the proper moisture content and shall be placed on the roadbed by
means of an approved spreader.
2. Travel Plant Method
After the material for each layer has been placed through an aggregate
spreader or windrow sizing device, it shall be uniformly mixed by a
traveling mixing plant.
3. Road Mix Method
After material for each layer has been placed, the materials shall be mixed
while at an optimum moisture content by motor graders or other approved
equipment until the mixture is uniform throughout.
3.06 SHOULDER CONSTRUCTION
A. Shoulders shall be constructed with base course material to conform to the elevation
and section shown in the Drawings. No equipment shall be used which by its design
or through its manner of operation that will damage the pavement or curbs. Insofar
as practicable, the base course material shall be placed directly on the shoulder area.
Materials that are deposited outside the shoulder area, if not contaminated, shall be
recovered and placed within the required limits. The CONTRACTOR will not be
compensated for materials not recovered as determined by the ENGINEER.
Materials shall not be deposited on the pavement or surfacing during placing unless
specifically permitted by the ENGINEER.
The base course material as placed shall be spread and compacted to the required
density in layers not exceeding six inches in compacted thickness. Any material
inadvertently placed on the pavement shall be broomed from the pavement. The
result shall not effect a change in the gradation of the shoulder material.
END OF SECTION
Bobcat Ridge Access Road 02710-5 Aggregate Base Course
Improvements
June 2006
PAGE INTENTIONALLY LEFT BLANK.
Bobcat Ridge Access Road 02710-6 Aggregate Base Course
Improvements
June 2006
SECTION 02740
FLEXIBLE PAVEMENT
PART1 GENERAL
1.01 SECTION INCLUDES
A. Hot Bituminous Pavement — This shall consist of constructing one or more courses of
HBP Grading S & SG over existing pavement or subgrade surfaces prepared by the
CONTRACTOR. This section covers paving of all new and existing asphalt
surfaces. Existing pavement is to be replaced with similar material as herein set
forth.
B. Asphalt Patching — HBP Grading S & SG shall be used in locations as directed by the
ENGINEER. These quantities will be restricted to small areas which require hand
placement methods and conventional paving equipment cannot be utilized.
1.02 RELATED SECTIONS
A. Section 02315 — Excavation and Embankment
B. Section 02710 — Aggregate Base Course
1.03 QUALITY ASSURANCE
A. Test samples will be taken in the field by the OWNER's independent testing service.
Mix designs and material samples are to be submitted for review at least 4 weeks
prior to material placement. All sampling and testing shall be done in accordance
with the latest methods of AASHTO, unless otherwise specified.
B. When placing the asphalt trench patch, saw cutting of the existing asphalt will not be
permitted within the wheel path of a travel lane. All asphalt patches shall conform to
the specifications outlined in the City of Fort Collins Design and Construction
Standards for Streets of Public Right-of-way, "Construction Details" section.
PART PRODUCTS
2.01 MATERIALS
A. Laboratory Mix Design — Grading S & SG - The mix designs shall be prepared by an
independent laboratory acceptable to the ENGINEER and shall be submitted by the
CONTRACTOR to the ENGINEER for approval a minimum on one (1) month prior
to the beginning of paving for this project. The criteria for the mix design shall be
determined by the City of Fort Collins Streets Department.
Designed according to the most recent set of SUPERPAVE Specifications available.
A request made in writing by the CONTRACTOR for changes in the job mix formula
will be considered by the ENGINEER.
Bobcat Ridge Access Road 02740-1 Flexible Pavement
Improvements
June 2006
THIS PAGE INTENTIONALLY LEFT BLANK.
Bobcat Ridge Access Road 01140-2 Contractor's Use of Premises
Improvements
June 2006
The CONTRACTOR shall prepare a quality control plan outlining the steps taken to minimize
segregation of HBP. This plan shall be submitted to the ENGINEER and approved prior to beginning
the paving operations. When the ENGINEER determines that segregation is unacceptable, the paving
shall stop and the cause of segregation shall be corrected before paving operations will be allowed to
resume.
Reclaimed materials will not be allowed in Hot Bituminous Pavement (HBP). A maximum of 20%
reclaimed material will be allowed for HBP Grading SG.
The CONTRACTOR shall construct the work such that all roadway pavement placed prior to the time
paving operations end for the year, shall be completed to the full thickness required by the Contract
Documents. The CONTRACTOR'S Progress Schedule shall show the methods to be used to comply
with this requirement.
The design mix for Grading S, SX, and SG shall conform to the following:
Air Voids, percent at:
N (initial)
N (design)
N (maximum)
Lab Compaction (Revolutions):
N (initial) (a)
N (design) (b)
N (maximum) (a)
Stability, minimum (a)
(for information)
Aggregate Retained on the 4.75 mm
(No. 4) Sieve with at least two
Mechanically Induced Fractured
Faces, % minimum
Accelerated Moisture Susceptibility
Tensile Strength Ratio (Lottman),
minimum
TABLE 403-1
CPL 5115
> 11.0 > 11.0 > 11.0
3.0-5.0 3.0-5.0 3.0-5.0
> 2.0 > 2.0 > 2.0
CPL 5115
8
8
(a)
100
100
(b)
158
158
(a)
CPL 5106 42
42
(a)
CP 45 60
60
60
CPL 5109 80 80 80
Method B
Minimum Dry Split Tensile Strength,
kPa (psi)
CPL 5109
Method B
205 (30)
205 (30)
205 (30)
Grade of Asphalt Cement
PG 64-22
PG 64-22
PG 64-22
Top Layer
Grade of Asphalt Cement Layers
PG 64-22
PG 64-22
PG 64-22
Below Top
Voids in the Mineral Aggregate
CP 48
14.0
12.0
(a)
(VMA) % minimum (a)
Voids Filled with Asphalt (VFA) %
AI MS-2
65 - 75
65 — 75
(a)
(a)
Bobcat Ridge Access Road 02740-2 Flexible Pavement
Improvements
June 2006
(a) Current CDOT Design Criteria
(b) Residential 50, Collector 75, Arterial 100
Note: AIMS-2 = Asphalt Institute Manual Series 2
Note: The current version of CPL 5115 is available from the Region Materials Engineer.
Note: Mixes with gradations having less than 40% passing the 4.75 nun (No. 4) sieve shall
be approached with caution because of constructability problems.
Subsection 403.03 is revised to include the following:
Regardless of the delivery temperature, the mixture shall not be placed for use on the roadway at a
temperature lower than 225°F.
Emulsified Asphalt for tack coat shall be Grade CSS-lh. The tack coat shall consist of a 1:1 dilution
(one (1) part emulsified asphalt to one (1) part water). The application rate for tack coat shall be
approximately 0.1 gallons per square yard.
The existing pavement shall be broomed and cleaned to be free of dirt, water, vegetation and other
deleterious matter immediately prior to commencing the paving operation. Edges of the area to be
patched shall be sawcut vertically, and perpendicular or parallel to the roadway, as directed by the
ENGINEER. Tack coat shall be placed against clean, vertical edges on all sides of the area to be
patched.
Hot Bituminous Pavement Grading S and SX shall be placed in equal lifts not exceeding three (3)
inches. The minimum lift thickness for Grading SX shall be one (1) inch and Grading S shall be (1
''/z) inch. HBP Grading SG shall be placed in equal lifts not exceeding four (4) inches and the
minimum lift thickness shall be three (3) inches. Overlaying layers of Hot Bituminous Pavement
shall not be placed until the lower layer has cooled sufficiently to provide a stable material which will
support the equipment without rutting, shoving or moving in any manner. Tack coat shall be placed
between all lifts.
Load slips shall be consecutively numbered for each day and shall include batch time.
2.02 PAVING PLANT REQUIREMENT
A. General Requirements:
Uniformity: The plants shall be so designed, coordinated and operated as to
produce a mixture within the job mix tolerances as covered in paragraph
2.03C under "Preparation and Composition of the Mixture."
2. Equipment for Preparation of Asphalt: Tanks for storage of asphalt shall be
capable of heating the material, under effective and positive control at all
times, to temperature requirements set forth in the Specifications. Heating
shall be accomplished by steam coils, electricity, or other means such that no
flame shall come in contact with the heating tank. A circulating system for
the asphalt shall be provided of adequate size to ensure the property and
continuous circulation between storage tank and mixer during the entire
operating period. All pipelines and fittings shall be steam jacketed or other
properly insulated to prevent heat loss. Storage tank capacity shall be
sufficient for at least one day's run.
Bobcat Ridge Access Road 02740-3 Flexible Pavement
Improvements
June 2006
3. Dryer: A rotary dryer of any satisfactory design for drying and heating the
mineral aggregates shall be provided. The dryer shall be capable of drying
and heating the mineral aggregate to the temperature requirements set forth
in the Specifications.
4. Screens: Plant screens, capable of screening all aggregates to the size
required for proportioning, and having norinal capacities slightly in excess of
the full capacity of the mixer, shall be provided. The mesh of the screens
shall be approved by the ENGINEER before paving operations.
5. Bins: The plant shall include a minimum of 3 dry aggregate storage bins
with the total capacity of not less than 3 times the dead load capacity of the
mixer. Each bin shall be provided with an overflow pipe that shall be of such
size and at such locations as to prevent any backing up of material into other
bins. Each bin shall have a suitable convenient means for sampling. The
sampling openings shall be subject to the approval of the ENGINEER.
6. Thermometric Equipment: An armored thermometer reading from 200OF to
500OF shall be fixed in the asphalt feed line at a suitable location from the
discharge valve at the mixer unit. The plant shall be further equipped with an
approved dial scale mercury actuated thermometer, an electric pyrometer, or
other approved thermometric instrument so placed at the discharge chute of
the dryer as to register automatically or indicate the temperature of the heated
aggregate.
7. Collectors: When plants are located in any vicinity where dust may be
objectionable, or when dust interferes with the efficient operation of the
plant, proper housing, mixer covers, dust collecting systems shall be
installed. Provision shall be made to waste the material so collected or to
return it uniformly to the mixture as the ENGINEER may direct.
8. Safety Equipment: Adequate and safe stairways to the mixer platform and
guarded ladders to other plant units shall be placed at all points required for
accessibility to all plant operations. All gears, pulleys, chains, sprockets, and
other dangerous moving parts shall be thoroughly guarded and protected.
Ample and unobstructed passage shall be maintained at all times in and
around the truck loading space. This space shall be kept free from drippings
from the mixing platform.
B. Special Requirements of Batch Plants:
Plant Scale: Scales for any weight box or hopper may be either of the beam
or springless dial type and shall be a standard make and design, sensitive to
'/z of 1% of the maximum load that may be required. When of the beam type,
there shall be a separate beam with telltale indicator for each size aggregate
and a tare beam for balancing the hopper.
2. Control of Mixing Time: The plant shall be equipped with an approved
means to govern the time of mixing and to maintain it.
3. Weight Box or Hopper: The equipment shall include a means for accurately
weighing each bin size to hold a full batch without hand raking or running
Bobcat Ridge Access Road 02740-4 Flexible Pavement
Improvements
June 2006
over. The weight box or hopper shall be supported on fulcrums and knife
edges so constructed that they will not be easily thrown out of alignment or
adjustment. Gates on both bins and hopper shall be so constructed as to
prevent leakage when they are closed.
4. Asphalt Bucket: The asphalt bucket which is used for weighing the asphalt
cement shall have sufficient capacity to hold not less than 10% of the weight
of aggregate required for one batch. It shall be steam jacketed or equipped
with properly insulated electric heat units and shall be suspended on dial
scales or beam scales equipped with a telltale indicator so that the tare weight
of asphalt cement can be measured accurately to within 2% above or below
the weight required. The bucket shall be so arranged that it will deliver the
molten asphalt cement in a thin uniform sheet or in multiple streams the full
width of the mixer.
5. Mixer Unit: The plant shall include a batch mixer of an approved twin
pugmill type or rotary drum type and shall be capable of producing a uniform
mixture within the job mix tolerances fixed by these Specifications. It shall
have a batch capacity of not less than 2,000 pounds.
If of the pugmill type, worn or improper pugmill paddles will not be
permitted. A mechanical batch counter shall be installed and shall be so
designed as to register upon only the actuation of the asphalt bucket release
and to preclude the register of any material through the operation of pulling
bins.
C. Special Requirements for Continuous Mixing Plants:
Gradation Control Unit: The plant shall include a means of accurately
proportioning each bin size of aggregate either by weighing or by volumetric
measurement. When gradation control is by volume, the unit shall have an
accurately controlled individual gate to form an orifice for volumetrically
measuring the material drawn from each respective bin compartment.
Indicators shall be provided on each gate to show the gate opening in inches.
2. Weight Calibration or Aggregate Feed: The plant shall include a means for
calibration of gate openings by means of weight test samples. The materials
fed out of the bins through individual orifices shall be bypassed to a suitable
test box, each compartment material confined in a separate box section. The
plant shall be equipped to handle conveniently such test samples weighting
up to 800 pounds and to weigh them on accurate scales.
3. Synchronization of Aggregate and Asphalt Feed: Satisfactory means shall be
provided to afford positive interlocking control between the flow of
aggregate from the bins and the flow of asphalt from the meter or other
proportioning sources. This control shall be accomplished by interlocking
mechanical means or any positive method under the control of the
ENGINEER.
4. Mixer Unit for Continuous Method: The plant shall include a continuous
mixer of an approved twin pugmill type, and shall be capable of producing a
uniform mixture within the job mix tolerance fixed by these Specifications.
Bobcat Ridge Access Road 02740-5 Flexible Pavement
hnprovements
June 2006
The paddles shall be of a type adjustable for angular position on the shafts
and reversible to retard the flow of the mix. The mixer shall carry a
manufacturer's plate giving the net volumetric contents of the mixer at the
several heights inscribed on a permanent gauge and also giving the rate of
feed of aggregate per minute at plant operating speed.
Unless otherwise required, determination of mixing time shall be by weight
methods under the following formula. The weights shall be determined for
the job by tests made by the ENGINEER.
Mixing time in seconds = Pugmill dead capacity in pounds
Pugmill output in pounds/seconds
The mixing time shall be approved by the ENGINEER.
2.03 PREPARATION OF MATERIAL
A. Preparation of Asphalt Cement: The asphalt cement shall be heated at the paving
plant to a temperature not exceeding 325T. The penetration of the asphalt cement
shall be maintained within the limits of penetration specified through the period of
us.
B. Preparation of Mineral Aggregates: The mineral aggregates shall be dried and heated
at the paving plant so that when delivered to the mixer, they shall be at as low a
temperature as is consistent with proper mixing and laying, and in no case to exceed
350°F. They may be fed simultaneously into the same drier but in all cases,
immediately after heating, they shall be screened into three or more bins. The screen
sizes shall be approved by the ENGINEER prior to the start of construction.
C. Preparation and Composition of the Mixture: Each size of hot aggregate, the mineral
filler and the asphalt cement shall be measured separately and accurately to the
proportions in which they are to be mixed. After the hot aggregate and mineral filler
have been charged into the mixer and thoroughly mixed as directed by the
ENGINEER, the asphalt cement shall be added and the mixing continued for a period
of at least 20 seconds, or longer if necessary, to produce a homogeneous mixture, in
which all particles of the mineral aggregates are coated uniformly.
D. Paving Plant Inspection: For the verification of weights or proportions and character
of materials and determination of temperatures used in the preparation of the mixture,
the ENGINEER or his authorized representative shall have access at any time to all
parts of the paving plant.
PART 3 EXECUTION
3.01 SURFACE PREPARATION
A. All final pavement cuts shall be made in straight lines using saw cut. Initial
pavement cuts may be made using wheel cut or other suitable method.
B. Prior to placing the prime coat, the base course shall be thoroughly cleaned. Loose
material shall be removed from the existing surface as directed by the ENGINEER.
Bobcat Ridge Access Road 02740-6 Flexible Pavement
Improvements
June 2006
3.02 PRIME COAT
A. All previously prepared bases or existing surface shall be primed with a cationic
emulsified asphalt in accordance with the requirements of these Specifications or as
directed by the ENGINEER. The prime coat shall be placed by means of an
approved pressure distributor. Before application, the asphaltic oil shall be heated as
directed by the ENGINEER. However, it shall not be heated to more than 180°F. In
general, the rate of application shall be from 0.25 to 0.35 gallons per square yard as
directed by the ENGINEER. The prime coat shall be carefully applied, particularly
around curbs and sidewalks. If excessive amounts of curb, sidewalks, or other
structures are sprayed with asphaltic oil, they shall be cleaned as directed by the
ENGINEER at the CONTRACTOR's expense. All vertical contact faces shall be
primed by painting with cationic emulsified asphaltic oil.
3.03 ASPHALTIC CONCRETE SURFACE
A. Transportation of Mixture: The mixture shall be transported from the paving plant to
the work in vehicles equipped with tight metal compartments previously cleaned of
all foreign materials. When directed by the ENGINEER, the compartments shall be
sufficiently insulated and each load shall be covered with canvas or other suitable
materials of sufficient size to protect it from weather conditions. The inside surface
of all vehicle compartments used for hauling mixture must be lightly lubricated with
a tin oil or soap solution just before loading, but excess lubricant will not be
permitted. No load shall be sent out so late in the day as to interfere with spreading
and compacting the mixture during daylight unless artificial light satisfactory to the
ENGINEER, is provided.
B. General Conditions: The mixture shall be laid only when the base is dry and only
when weather conditions are suitable. The mixture shall be laid when atmospheric
temperatures are consistent with the placement temperature limitations as outlined on
page 02740-10. Asphalt shall not be placed when frost exists in the subgrade. Any
material laid shall be rolled with pneumatic rollers in addition to the specified rolling,
as directed by the ENGINEER.
C. Placing Asphalt Mixture: If traffic is allowed to use the prepared subgrade or sub-
base, the subgrade or sub -base shall be checked and corrected as needed immediately
ahead of placing bituminous materials. Prior to placement of the bituminous surface,
the base shall be cleaned of all dirt or other foreign matter. When the new pavement
abuts the old pavement, the CONTRACTOR shall cut the old pavement as directed
by the ENGINEER and paint the edge of the pavement with a tack coat.
Bobcat Ridge Access Road 02740-7 Flexible Pavement
Improvements
June 2006
PLACEMENT TEMPERATURE LIMITATIONS
Top Layer of
The Completed Pavement
Min. Placement Air Temp.
Layers Below the Top
Laver of Completed Pavement
Min. Placement Air Temp
Compacted Mix Temp. Mix Temp Compacted Mix Temp. Mix Temp.
Thickness Over 234 F 200-234 F Thickness over 234 F 200-234 F
Under 1" 60OF
70OF Under 2"
40OF
50OF
1"-2'/2" 50OF
550F 2-3"
30OF
40OF
Over 2 %:" 40OF
45OF 3 '/-4"
250F
30OF
Over 4"
20OF
20OF
The asphaltic pavement shall be placed only when the base is stable and weather
conditions are suitable. The asphaltic pavement shall have a density of ninety-five
percent (95%) of a representative laboratory compacted specimen by the Hveem
method as tested in accordance with ASTM Method 2950-B2 and ASTM D 2726-83.
While the surface is being compacted and finished, the CONTRACTOR shall
carefully trim the outside edges of the pavement to the proper alignment.
Unless otherwise permitted by the ENGINEER, the mixture shall be spread by means
of a mechanical self -powered paver, capable of spreading the mixture true to the line,
grade, and crown set by the ENGINEER.
Pavers shall be equipped with hoppers and distributing screws of the reversing type
to place the mixture evenly in front of adjustable screeds. The mixture shall be
dumped in the center of the hoppers and care exercised to avoid overloading and
spilling over of the mixture upon the base. Pavers shall operate when laying mixtures
at such speed between 10 feet and 20 feet per minute, as may be decided by the
ENGINEER.
Pavers shall be equipped with a quick and efficient steering device and shall have
forward and reverse speeds of not less than 100 feet per minute.
Unless operating on fixed side forms, pavers shall employ mechanical devices such
as equalizing runners, straightedge runners, evener arms, or other compensating
devices to adjust the grade and confine the edges of the mixture to true lines within
the use of stationary side forms. The pavers shall be capable of spreading the
mixtures, without segregation, in thickness of from inch to 3 inches, to a maximum
width of 10 feet in increments of 1 foot or less and to a minimum width of 8 feet.
They shall be equipped with blending or joint leveling devices for smoothing and
adjusting all longitudinal joints between adjacent strips of courses of the same
thickness.
When asphalt concrete pavement thickness in excess of 2 inches is called for, they
shall be laid in separate courses of not less than 1 inch or more than 2 inches or as
directed by the ENGINEER.
Bobcat Ridge Access Road 02740-8 Flexible Pavement
Improvements
June 2006
The term "screed" includes a "strike -oft' device operating by cutting, crawling, or
other practical action which is effective on the mixture at a workable temperature
without tearing, shoving, or gouging and which produces a finished surface of the
evenness and texture specified. The screed shall be adjustable as to level and shall
have an indicating level attached. Longitudinal and transverse joints shall be made in
a careful manner. Well bonded and sealed joints are required. If necessary to obtain
this result, joints shall be painted with cationic emulsified asphaltic cement.
In making the joint along any adjoining edges such as curb, gutter, or an adjoining
pavement and after the hot mixture is placed by the finished machine, just enough of
the hot material shall be carried back to fill any space left open. This joint shall be
properly "set" up with the back of rake at proper height and level to receive the
maximum compression under rolling. The work of "setting up" this joint shall be
performed always by competent workmen who are capable of making correct, clean,
and neat joints.
Immediately after any course is screeded, and before roller compaction is started, the
surface shall be checked, any inequalities adjusted, all fat, sandy accumulations from
the screed removed by a rake or hoe, and all fat spots in any course removed and
replaced with satisfactory material. Irregularities in alignment and grade along the
outside edge shall also be corrected by the addition or removal of mixture before the
edge is rolled.
In narrow, deep, or irregular sections, intersections, turnouts, or driveways where it is
impractical to spread and finish the mixtures by machine methods, the
CONTRACTOR may used approved spreading equipment or acceptable hand
methods as directed by the ENGINEER.
When the mixture is to be spread by hand, upon arrival on the work it shall be
dumped upon a steel dump board outside the area on which it is to be spread.
Immediately thereafter it shall be distributed into place by means of hot shovels and
spread with hot rakes in a loose layer of uniform density and correct depth. Tines of
the rakes shall not be less than'h inch longer than the loose depth of the mixture, and
spaces between tines shall not be less than the maximum diameter of aggregate
particle except that in no case should the spaces be less than 1 inch. Loads shall not
be dumped any faster than can be properly handled by the shovelers.
The shovelers shall not distribute the dumped load faster than it can be properly
handled by the rakers.
The rakers will not be permitted to stand in the hot mixture while raking it, except
where necessary to correct errors in the first raking. The raking must be carefully
and skillfully done in such a manner that after the first passage of the roller over the
raked mixture, a minimum amount of back patching will be required.
Placing mixtures shall be as continuous as possible and the roller shall pass over the
unprotected edge of the freshly laid mixture only when the laying of this course is to
be discontinued for such intervals of time as to permit the mixture to become chilled.
D. Joints: Joints between old and new pavements, or between successive days' work,
shall be carefully made in such a manner as to insure a thorough and continuous bond
Bobcat Ridge Access Road 02740-9 Flexible Pavement
Improvements
June 2006
between the old and new surfaces. The edge of the previously laid course shall be cut
back to its full depth so as to expose a fresh surface, after which the hot surface
mixture shall be placed in contact with it and raked to a proper depth and grade. Hot
smoothers or tampers shall be carefully used in such a manner as to heat up the old
pavement sufficiently (without burning it) to insure a proper bond. Before placing
mixture against them, all contact surfaces of curbs, gutters, headers, manholes, etc.,
shall be painted with a thin uniform coating of cationic emulsified asphaltic cement.
E. Compaction of the Mixture: After spreading, the mixture shall be thoroughly and
uniformly compressed by a power -driven roller or rollers, weighing not less than 8
tons, as soon after being spread as it will bear the roller without undue displacement.
Delays in rolling freshly spread mixture will not be tolerated. Rolling shall start
longitudinally at the sides and shall proceed toward the center of the pavement
overlapping on successive trips by at least '/z the width of a rear wheel. Alternate
trips of the roller shall be of slightly different lengths. If the width of the pavement
permits, it shall, in addition, be rolled at right angles to the center line.
The speed of the roller shall not exceed 3 miles per hour and shall, at all times, be
slow enough to avoid displacements of the hot mixture, and any displacement
occurring as a result of reversing the direction of the roller, or from any other cause,
shall at once be corrected by the use of rakes and of fresh mixture where required.
Rolling shall proceed continuously until all roller marks are eliminated. To prevent
adhesion of the mixture to the roller, the wheels shall be kept properly moistened, but
excess water will not be permitted.
The rollers shall be in good condition, capable of reversing without back -lash and
shall weight not less than 200 pounds to the inch of tread. They shall be operated by
competent and experienced rollermen and must be kept in continuous operation as
nearly as practicable in such a manner that all parts of the pavements shall receive
substantially equal compression.
Along curbs, headers, manholes, and similar structures, and all places not accessible
to the roller, thorough compactions must be secured by means of hot tampers and at
all contacts of this character, the joints between these structures and the surface
mixture must be effectively sealed.
The course, after final compaction, shall conform to the following requirements:
It shall be smooth and true to the established crown and grade. It shall have the
average thickness specified and shall at no point vary more than '/a -inch from the
thickness required by the OWNER or the Contract Documents. Any low or defective
places shall immediately be remedied by cutting out the course at such spots and
replacing it with fresh, hot mixture which shall be immediately compacted to
conform with the surrounding area and shall be free from depressions exceeding '/-
inch as measured with a 10-foot straightedge paralleling the centerline of the
roadway.
After final compaction, the finished surface course shall at no point have a density
less than 95% of the maximum density possible to be obtained in a voidless
pavement composed of the same materials in like proportions. Density shall be
determined from specimens cut from the finished pavement as directed by the
ENGINEER.
Bobcat Ridge Access Road 02740-10 Flexible Pavement
Improvements
June 2006
3.04 ASPHALT PATCHING
A. Grading SG shall be placed in the bottom of the patches and shall be left one and
one-half (1/2) to two (2) inches below the existing street surface to allow the patch to
be "topped" with a surface course material. The "topping" material shall be Hot
Bituminous Pavement Grading SX for residential streets, and Grading S for arterials
and collectors. Hot Bituminous Pavement used for "topping" material will be
measured and paid for at the Contract Unit Price for Patching.
In locations where concrete repairs take place in an area of a large patch or in grind
areas and the grind operation does not immediately follow the concrete repair (three
(3) days), the CONTRACTOR shall remove no more than six (6) inches of pavement.
The pavement areas shall be temporarily patched with a minimum of two (2) inches
of asphalt.
Regardless of the delivery temperature, the mixture shall not be placed for use on the
roadway at a temperature lower than 2250F.
3.05 PAVING FABRIC
A. This work shall consist of placing Geotextile Paving Fabric as manufactured by
Phillips Fibers Corporation, Hoechst Fibers Industries, Amoco Fabrics Company, or
an approved equal in designated areas in substantial compliance with the Drawings,
Specifications and as directed by the ENGINEER.
B. Materials
Geotextile Paving Fabric
shall be a non -woven, needle -punched pavement
reinforcing fabric which conforms to the following properties:
Grab Strength, either
90 lbs.
direction, minimum
(ASTM D-4632)
Elongation, either direction,
50 percent
minimum
(ASTM D-4632)
Burst Strength, minimum
185 PSI
(ASTM D-3786)
Weight, minimum
3.6 oz./sq. yd.
Asphalt Retention, minimum
0.2 gal./sq. yd.
(TF25 #8)
Melting Point, minimum
3000 Fahrenheit
(ASTM D-276)
The tack coat to be applied to the road surface and/or to the Geotextile Paving Fabric
shall meet the following requirements:
Bobcat Ridge Access Road 02740-11 Flexible Pavement
Improvements
June 2006
SECTION 01145
SPECIAL PROJECT PROCEDURES
PART1 GENERAL
1.01 SECTION INCLUDES
A. General construction requirements and special considerations relating to the elements
of construction of the Bobcat Access Ridge Road Improvements. Specific
descriptions of the work are provided for the following sections of the project:
The demolition of the existing steel flume and wooden supporting structure
PART 2 PRODUCTS (Not Applicable)
PART 3 EXECUTION
3.01 SALVAGE OF PORTIONS OF THE EXISTING STEEL FLUME
A. After the demolition of the existing steel flume and supporting wooden structure, the
CONTRACTOR shall retain the come -along, chains, cables, girder bar, and the metal
piping. CONTRACTOR shall contact the Chance family at (970) 667-1173 to collect
these materials from the site.
END OF SECTION
Bobcat Ridge Access Road 01145-1 Special Project Procedures
Improvements
June 2006
Asphalt Cement AC-20
Emulsified and/or Cutback Asphalt shall not be used as tack coat for Geotextile
Paving Fabric.
C. Construction Requirements
Surface preparation: The pavement to be repaired shall be cleaned and free of dirt,
dust, water and vegetation. Cracks shall be cleaned and filled in accordance with
these Specifications. If the crack filling materials contain volatiles, adequate curing
time must be allowed prior to placement of the fabric. The pavement must be cleared
of all sharp or angular protrusions.
Application of Tack Coat: The tack coat shall be applied at a rate in accordance with
the manufacturer's specifications (approximately 0.25 gal./sq. yd). Application must
be by a distributor. Temperature of the tack coat must be sufficiently high to permit a
uniform spray pattern. The maximum asphalt temperature shall be 3000F.
Geotextile Pavine Fabric Placement: The Geotextile Paving Fabric shall be placed
into the tack coat with a minimum of wrinkles.
If Geotextile Paving Fabric folds greater than one inch (1") occur, the Geotextile
Paving Fabric shall be slit and allowed to lie flat. Additional tack coat shall be
placed as required to insure fabric bonding.
If Geotextile Paving Fabric is placed adjacent to patched sections of roadway, the
fabric shall overlap said patched section a minimum of 12 inches.
All joints shall overlap adjacent fabric approximately 2-6 inches.
Transverse joints of the Geotextile Paving Fabric shall be shingled in the direction of
the paving to prevent edge pickup by the paver.
Additional tack coat shall be uniformly applied to the joints and overlaps to insure
bonding.
It shall be the CONTRACTOR's responsibility to maintain the Geotextile Paving
Fabric until the overlay is complete. If the Geotextile Paving Fabric begins to be
picked up, the CONTRACTOR shall immediately broadcast sand or hot mix asphalt
over the area or "skin" the Geotextile Paving Fabric with Hot Bituminous Pavement
SC Type 1 or 2. Excess sand or hot mix shall be removed before paving. Sand used
for this purpose will not be measured and paid for separately under the terms of this
contract.
Geotextile Paving Fabric shall be clean, dry and sufficiently bonded to the tack coat
prior to commencing the paving operations. Paving operations shall be completed
the same day as the Geotextile Paving Fabric placement.
3.06 MANHOLE FRAMES AND VALVE BOXES
A. Manhole frames and water valve vaults can be completed after paving operation by
using "plates."
Bobcat Ridge Access Road 02740-12 Flexible Pavement
Improvements
June 2006
B. Foreign matter which is introduced into manholes and valve vaults shall be removed
immediately to provide free access to the facilities.
C. Valve vaults and manhole rings shall be straight and properly aligned. Adjustments
to be made with concrete rings and mortar only (maximum tolerance is ''/<").
Valve boxes shall be inspected by placing a valve key on the operating nut to assure a
proper alignment.
END OF SECTION
Bobcat Ridge Access Road 02740-13 Flexible Pavement
Improvements
June 2006
PAGE INTENTIONALLY LEFT BLANK
Bobcat Ridge Access Road 02740-14 Flexible Pavement
Improvements
June 2006
SECTION 02920
LAWNS AND GRASSES
PART1 GENERAL
1.01 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and
Supplementary Conditions and Division 1 Specification Sections, apply to this
Section.
1.02 SUMMARY
A. This Section includes the following:
1. Seeding.
B. Related Sections include the following:
1. Division 2 Sections 02315 and 02320 for topsoil stripping, stockpiling,
excavation, filling and backfilling, and rough grading.
1.03 DEFINITIONS
A. Finish Grade: Elevation of finished surface of planting soil.
B. Manufactured Soil: Soil produced off -site by homogeneously blending mineral soils
or sand with stabilized organic soil amendments to produce topsoil or planting soil.
C. Planting Soil: Native or imported topsoil, manufactured topsoil, or surface soil
modified to become topsoil; mixed with soil amendments.
D. Subgrade: Surface or elevation of subsoil remaining after completing excavation, or
top surface of a fill or backfill immediately beneath planting soil.
1.04 SUBMITTALS
A. Product Data: For each type of product indicated.
B. Certification of Grass Seed: From seed vendor for each grass -seed monostand or
mixture stating the botanical and common name and percentage by weight of each
species and variety, and percentage of purity, germination, and weed seed. Include
the year of production and date of packaging.
C. Product Certificates: For soil amendments and fertilizers, signed by product
manufacturer.
D. Qualification Data: For landscape Installer.
E. Material Test Reports: For existing surface soil and imported topsoil.
Bobcat Ridge Access Road 02920-1 Lawns and Grasses
Improvements
June 2006
1.05 QUALITY ASSURANCE
A. Installer Qualifications: A qualified landscape installer whose work has resulted in
successful seed establishment.
1. Installer's Field Supervision: Require Installer to maintain an experienced full-
time supervisor on Project site when planting is in progress.
B. Topsoil Analysis: Furnish soil analysis by a qualified soil -testing laboratory stating
percentages of organic matter; gradation of sand, silt, and clay content; cation
exchange capacity; deleterious material; pH; and mineral and plant -nutrient content
of topsoil.
1. Report suitability of topsoil for seed growth. State recommended quantities of
nitrogen, phosphorus, and potash nutrients and soil amendments to be added to
produce a satisfactory topsoil.
C. Preinstallation Conference: Conduct conference at Project site to comply with
requirements in Division 1 Section 01310.
1.06 DELIVERY, STORAGE, AND HANDLING
A. Seed: Deliver seed in original sealed, labeled, and undamaged containers.
1.07 SCHEDULING
A. Planting Restrictions: Plant during one of the following periods. Coordinate planting
periods with maintenance periods to provide required maintenance from date of
Substantial Completion.
1. Spring Planting: March 1st to May 30th
2. Fall Planting: August 1st to October 1st
B. Weather Limitations: Proceed with planting only when existing and forecasted
weather conditions permit.
1.08 NATIVE GRASS MAINTENANCE
A. Begin maintenance immediately after each area is planted and continue until
acceptable seed is established, but for not less than the following periods:
1. Seeded Areas: 60 days from date of Substantial Completion.
a. When full maintenance period has not elapsed before end of planting season,
or if Areas is not fully established, continue maintenance during next
planting season.
B. Maintain and establish grasses by watering, fertilizing, weeding, mowing, trimming,
replanting, and other operations. Roll, regrade, and replant bare or eroded areas to
produce a uniformly seeded area.
Bobcat Ridge Access Road 02920-2 Lawns and Grasses
Improvements
June 2006
C. Watering: Water grasses with automatic sprinkler system or temporary sprinkler
system.
1. Schedule watering to prevent wilting, puddling, erosion, and displacement of
seed or mulch. Lay out temporary watering system to avoid walking over muddy
or newly planted areas.
2. Water grasses at a minimum rate of 1 inch per week.
PART2 PRODUCTS
2.01 SEED
A. Grass Seed: Fresh, clean, dry, new -crop seed complying with AOSA's "Journal of
Seed Technology; Rules for Testing Seeds" for purity and germination tolerances.
B. Seed Species: State -certified seed of grass species, as follows:
Dryland Mix: Provide certified grass seed blends or mixes, proportional by
weight as follows:
SEED MIX FOR BOBCAT RIDGE NATURAL AREA ACCESS ROAD
COMMON
SCIENTIFIC
SEEDS/LBS
% IN MIX
LBS/PLS/ACRE
NAME
NAME
DRILL SEEDED
Western
Pascopyrum
110,000
10
3.2
wheatgrass
smithii
Sideoats grama
Bouteloua
190,000
15
2.8
curb endula
Blue grama
Chondrosum
825,000
15
0.6
gracile
Prairie junegrass
Koeleria
2,300,000
5
0.1
macrantha
Needle-n-thread
Hesperostipa
115,000
25
7.6
comata
Green
Nassella
181,000
20
3.4
needlegrass
viridula
Six weeks fescue
Vul is octo ora
1,800,000
15
0.3
Seed Species: Seed of grass species with not less than 95 percent germination and
not more than 0.5 percent weed seed.
2.02 TOPSOIL
A. Topsoil: ASTM D 5268, pH range of 5.5 to 7, a minimum of 4 percent organic
material content; free of stones 1 inch or larger in any dimension and other
extraneous materials harmful to plant growth.
Bobcat Ridge Access Road 02920-3 Lawns and Grasses
Improvements
June 2006
1. Topsoil Source: Reuse surface soil stockpiled on -site. Verify suitability of
stockpiled surface soil to produce topsoil. Clean surface soil of roots, plants, sod,
stones, clay lumps, and other extraneous materials harmful to plant growth.
a. Supplement with imported or manufactured topsoil from off -site sources
when quantities are insufficient. Obtain topsoil displaced from naturally
well -drained construction or mining sites where topsoil occurs at least 4
inches deep; do not obtain from agricultural land, bogs or marshes.
2.03 ORGANIC SOIL AMENDMENTS
A. Compost: Well -composted, stable, and weed -free organic matter, pH range of 5.5 to
8; moisture content 35 to 55 percent by weight; 100 percent passing through 1-inch
sieve; soluble salt content of 5 to 10 decisiemens/m; not exceeding 0.5 percent inert
contaminants and free of substances toxic to plantings; and as follows:
1. Organic Matter Content: 50 to 60 percent of dry weight.
B. Manure: Well -rotted, unleached, stable or cattle manure containing not more than 25
percent by volume of straw, sawdust, or other bedding materials; free of toxic
substances, stones, sticks, soil, weed seed, and material harmful to plant growth.
2.04 FERTILIZER
Commercial Fertilizer: Commercial -grade complete fertilizer of neutral character, consisting
of fast- and slow -release nitrogen, 50 percent derived from natural organic sources of urea
formaldehyde, phosphorous, and potassium in the following composition:
2.05 MULCHES
A. Straw Mulch: Provide air-dry, clean, mildew- and seed -free, salt hay or threshed
straw of wheat, rye, oats, or barley.
2.06 EROSION -CONTROL MATERIALS
A. Erosion -Control Blankets: Biodegradable wood excelsior, straw, or coconut -fiber
mat enclosed in a photodegradable plastic mesh. Include manufacturer's
recommended steel wire staples, 6 inches long.
PART 3 EXECUTION
3.01 EXAMINATION
A. Examine areas to receive lawns and grass for compliance with requirements and
other conditions affecting performance. Proceed with installation only after
unsatisfactory conditions have been corrected.
3.02 PREPARATION
A. Protect structures, utilities, sidewalks, pavements, and other facilities, trees, shrubs,
and plantings from damage caused by planting operations.
Bobcat Ridge Access Road 02920-4 Lawns and Grasses
Improvements
June 2006
B. Provide erosion -control measures to prevent erosion or displacement of soils and
discharge of soil -bearing water runoff or airborne dust to adjacent properties and
walkways.
3.03 NATIVE GRASS PREPARATION
A. Limit subgrade preparation to areas to be planted.
B. Newly Graded Subgrades: Loosen subgrade to a minimum depth of 6 inches in any
dimension and sticks, roots, rubbish, and other extraneous matter and legally dispose
of them off Owner's property.
1. Apply fertilizer directly to subgrade before loosening.
2. Apply soil amendments and fertilizer on surface, and thoroughly blend planting
soil mix.
a. Delay mixing fertilizer with planting soil if planting will not proceed within a
few days.
3. Spread planting soil mix to a depth of 6 inches but not less than required to meet
finish grades after light rolling and natural settlement. Do not spread if planting
soil or subgrade is frozen, muddy, or excessively wet.
C. Unchanged Subgrades: If grasses are to be planted in areas unaltered or undisturbed
by excavating, grading, or surface soil stripping operations, prepare surface soil as
follows:
1. Remove existing grass, vegetation, and turf. Do not mix into surface soil.
2. Loosen surface soil to a depth of at least of 6 inches. Apply soil amendments and
fertilizers according to planting soil mix proportions and mix thoroughly into top
4 inches of soil. Till soil to a homogeneous mixture of fine texture.
a. Apply fertilizer directly to surface soil before loosening.
3. Remove stones larger than 1 inch in any dimension and sticks, roots, trash, and
other extraneous matter.
4. Legally dispose of waste material, including grass, vegetation, and turf, off
Owner's property.
D. Finish Grading: Grade planting areas to a smooth, uniform surface plane with loose,
uniformly fine texture. Grade to within plus or minus 1/2 inch of finish elevation.
Roll and rake, remove ridges, and fill depressions to meet finish grades. Limit fine
grading to areas that can be planted in the immediate future.
E. Moisten prepared grasses areas before planting if soil is dry. Water thoroughly and
allow surface to dry before planting. Do not create muddy soil.
F. Restore areas if eroded or otherwise disturbed after fmish grading and before
planting.
Bobcat Ridge Access Road 02920-5 Lawns and Grasses
Improvements
June 2006
3.04 SEEDING
A. Sow seed with spreader or seeding machine. Do not broadcast or drop seed when
wind velocity exceeds 5 mph. Evenly distribute seed by sowing equal quantities in
two directions at right angles to each other.
1. Do not use wet seed or seed that is moldy or otherwise damaged.
Sowing rates vary with grass species and mixtures. Revise first paragraph below
to suit Project.
B. Sow seed at the rate specified.
C. Rake seed lightly into top 1/8 inch of topsoil, roll lightly, and water with fine spray.
D. Protect seeded areas with slopes exceeding 1:5 with erosion -control blankets installed
and stapled according to manufacturer's written instructions.
E. Protect seeded areas with slopes not exceeding 1:5 by spreading straw mulch. Spread
uniformly at a minimum rate of 2 tons/acre to form a continuous blanket 1-1/2 inches
in loose depth over seeded areas. Spread by hand, blower, or other suitable
equipment.
1. Anchor straw mulch by crimping into topsoil with suitable mechanical
equipment.
3.05 CLEANUP AND PROTECTION
A. Promptly remove soil and debris created by grass work from paved areas. Clean
wheels of vehicles before leaving site to avoid tracking soil onto roads, walks, or
other paved areas.
B. Erect barricades and warning signs as required to protect newly planted areas from
traffic. Maintain barricades throughout maintenance period and remove after grass is
established.
C. Remove erosion -control measures after grass establishment period.
END OF SECTION
Bobcat Ridge Access Road 02920-6 Lawns and Grasses
Improvements
June 2006
DIVISION 3 - CONCRETE
SECTION 03110
SECTION 03210
SECTION 03310
SECTION 03320
SECTION 03350
SECTION 03390
SECTION 03615
Bobcat Ridge Access Road
Improvements
June 2006
STRUCTURAL CAST -IN -PLACE CONCRETE
FORMS
REINFORCING STEEL
STRUCTURAL CONCRETE
CONSTRUCTION JOINTS
CONCRETE FINISHING
CONCRETE CURING
GROUT
THIS PAGE INTENTIONALLY LEFT' BLANK
Bobcat Ridge Access Road 01145-2 Special Project Procedures
Improvements
June 2006
No Text
SECTION 03110
STRUCTURAL CAST -IN -PLACE CONCRETE FORMS
PART1 GENERAL
1.01 SECTION INCLUDES
The CONTRACTOR shall supply all labor, tools, equipment and materials to set forms for
the proper placement of concrete for structures. It is the CONTRACTOR's responsibility to
design and build adequate forms and to leave them in -place until the forms can be safely
removed. The CONTRACTOR is responsible for damage and injury caused by removing
forms carelessly or before the concrete has gained sufficient strength. Means and methods
of repair shall be reviewed by the ENGINEER prior to performing the work.
1.02 RELATED SECTIONS
A. Section 03310 — Structural Concrete
B. Section 03320 — Construction Joints
C. Section 03350 - Concrete Finishing
D. Section 03615 - Grout
1.03 QUALITY STANDARDS
A. American Concrete Institute
ACI 318 - Building Code Requirements for Structural Concrete
2. ACI SP-4 - Formwork for Concrete
B. American Plywood Association
2.
3.
1.04 SUBMITTALS
A. General
PS 1 - US Product Standard for Construction and Industrial Plywood
J20 - Grades and Specifications
V345 - Concrete Forming
Design, placement and maintenance of formwork and form systems is the
responsibility of the CONTRACTOR. Submittals other than listed herein are not
required nor will they be reviewed.
B. Product Technical Data
1. Manufacturer and type of form materials
Bobcat Ridge Access Road 03110-1 Structural Cast -In -Place
Improvements Concrete Forms
June 2006
2. Manufacturer and type of form ties
3. Manufacturer and type of void form including compressive strength
4. Manufacturer of form release agent
C. Formwork Design
A copy of a transmittal letter from the designing engineer to the CONTRACTOR
indicating that the design of the formwork for the project was prepared by or under
his supervision. The letter shall be stamped with the seal of the designing engineer
and signed in accordance with the professional engineering registration laws where
the project is located. The designing engineer's qualifications shall be attached to
the transmittal letter.
1.05 QUALITY ASSURANCE
Formwork, and if required shoring and reshoring, shall be designed by a Professional
Engineer licensed to practice in the state where the project is located and having a minimum
of five years' experience in the design of concrete formwork or form systems.
PART PRODUCTS
2.01 GENERAL
For the purposes of this specification exposure shall be defined as a surface, interior or
exterior, of a structure that will be exposed to view during its use. For example, the interior
wall of a buried water retaining structure is a surface exposed to view.
2.02 FORMS FOR SURFACES EXPOSED TO VIEW
A. Walls
1. APA B-B Plyform Class I, Exterior, PS-1-83. The plywood shall be mill
oiled and edge sealed.
2. Symons hand set steel -ply forms, or equal.
: �
APA B-B Plyform Class I, Exterior, PS-1-83. The plywood shall be mill
oiled and edge sealed.
2. Symons hand set steel -ply forms, or equal.
C. Sides of Column Footings
1. APA B-B Plyform Class I, Exterior, PS-1-83. The plywood shall be mill
oiled and edge sealed.
2. Symons hand set steel -ply forms, or equal.
Bobcat Ridge Access Road 03110-2 Structural Cast -In -Place
Improvements Concrete Forms
June 2006
3. Steel of sufficient thickness that the form will remain true to shape after
numerous repetitive uses.
D. Sides of Curved or Straight Continuous Wall Footings
APA High Density Overlay Plyform Class I Exterior.
2. APA B-B Plyform Class I, Exterior, PS-1-83.
For curved surfaces, plywood of sufficient thickness, free from knots and other
imperfections, which can be cut and bent and held in place accurately to the required
curvature without splintering or splitting shall be used-
E. Floor and Roof Slabs
APA B-B Plyform Class I, Exterior, PS-1-83. The plywood shall be mill
oiled and edge sealed.
F. Columns
Regardless of materials of construction the forms shall be such to permit bracing in
two directions at half -height and full height at a minimum. Two braces at 90' are
required at half and full height.
Steel of sufficient thickness that the form will remain true to shape after
numerous repetitive uses.
2. Fiberglass of sufficient thickness that the form will remain true to shape.
G. Column Capitals
Steel, 16 gage or thicker, so that the form will remain true to shape after
numerous repetitive uses.
2.03 FORMS FOR SURFACES NOT EXPOSED TO VIEW
Wood or steel sufficiently tight to prevent mortar leakage.
2.04 ANCHORAGE IN SLABS FOR BRACES FOR WALL AND COLUMN FORMS
Braces shall be anchored to deadmen of sufficient size and weight to maintain the proper
wall/column alignment under all load conditions including wind.
Wedge anchors of any type, inserts or concrete nails are specifically not permitted for
anchorage of wall or column braces in water retaining structures. Wedge anchors or nails
may be used in other structures when in the opinion of the ENGINEER the resulting concrete
finish patch will be acceptable. The CONTRACTOR shall make a submittal including
information about the type of wedge anchor or nail and the means of patching the surface for
review and acceptance by the ENGINEER.
Bobcat Ridge Access Road 03110-3 Structural Cast -In -Place
Improvements Concrete Forms
June 2006
2.05 ANCHORAGE IN SLABS FOR UPTURNED COLUMN FOOTING FORMS
Braces shall be anchored to deadmen of sufficient size and weight to maintain the proper
wall/column configuration and diameter. Wedge anchors of any type, inserts or concrete
nails are specifically not permitted for anchorage of column footing forms.
2.06 FORM TIES
A. Water Retaining Structures and Below Grade Structures:
Symons, S-Panel Ties, or equal, with water seal and one -inch break back cones on
both tie ends, shall be used on all wall forms.
B. Other Structures:
Symons, S-Panel Ties, or equal, with one -inch break back cones on both tie ends
unless otherwise called out or shown in the Drawings or approved by the
ENGINEER, shall be used on all wall forms.
C. Twisted Wire Ties:
Twisted wire ties with loops to hold forms in position are not permitted.
2.07 CHAMFER STRIP
Chamfer strips (3/4 inch) shall be placed in the comers of forms and at the tops of walls or
up -turned footings, to produce beveled edges on permanently exposed concrete surfaces.
Interior angles of intersecting concrete surfaces and edges of construction joints shall not be
beveled unless otherwise indicated in the Drawings. The chamfer strip may be made of
wood or polyvinyl chloride (PVC).
2.08 STIFFBACKS
Stiffbacks for wall forms shall be constructed of lumber or Glulams, uniform in width and
thickness, free from knots and other surface defects. Only one joint is permitted in the board
of a stiffback and joints shall be offset so as to not occur at the same point. Stiffbacks shall
extend to a point not less than six inches above the top of forms.
2.09 GANG WHALER PLATES FOR THE TOP OF CURVED WALLS
Gang whaler plates shall be constructed of plywood as described below cut to the radius of
the wall curve. The gang whaler plate shall be of sufficient depth to permit notching for
stiffbacks.
A. APA High Density Overlay Plyform Class I Exterior.
B. APA B-B Plyform Class I, Exterior, PS-1-83.
2.10 WEDGE INSERTS
When permitted by the ENGINEER at the tops of walls or columns, wedge inserts may be
Bobcat Ridge Access Road 03110-4 Structural Cast -In -Place
Improvements Concrete Forms
June 2006
used to support future formwork or catwalks. The inserts shall be Richmond Screw Anchor,
or equal.
2.11 FORM RELEASE AGENT
Magic Kote by Symons Corp. or equal.
PART EXECUTION
3.01 GENERAL
Forms shall be used, wherever necessary, to confine the concrete and shape it to the specified
lines and grades as shown on the Drawings. The CONTRACTOR shall set and maintain
concrete forms so as to ensure completed work is within all applicable tolerance limits. If a
type of form does not, in the opinion of the ENGINEER, consistently perform in an
acceptable manner, the type of form shall be changed and the method of erection shall be
modified by the CONTRACTOR, subject to the review of the ENGINEER.
Forms shall have sufficient strength to withstand the pressure resulting from placement and
vibration of concrete, and shall be maintained rigidly in position. The design of formwork
and placing rate of concrete with medium and high -range water reducing agents shall be
adjusted to compensate for the greater hydraulic pressures exerted on the forms by concrete
of high fluidity.
Forms shall be clean and free from mortar and other foreign material from previous use prior
to being placed.
The CONTRACTOR shall demonstrate that forms are vertical, proper alignment, grade or
radius when requested by the ENGINEER.
3.02 FORM SURFACE TREATMENT
A. General
Prior to placing reinforcing steel coat the forms with a non -staining release agent
that will effectively prevent the absorption of moisture and prevent bond of the
concrete to the form. Contact with hardened concrete against which fresh concrete is
to be placed is prohibited. All bond breaking materials or processes shall be used
only after acceptance by the ENGINEER. Care shall be taken in applying form oil
to avoid contact with reinforcement steel. Embedded material which becomes
coated with form oil shall be thoroughly cleaned or replaced at the expense of the
CONTRACTOR.
B. For Potable Water Facilities
Form release agents for potable water facilities, such as treated water storage
reservoirs or water treatment plants, shall be non -toxic 30 days after application.
3.03 TOLERANCES
Tolerances are defined as allowable variations from specified alignments, grades and dimen
Bobcat Ridge Access Road 03110-5 Structural Cast -In -Place
Improvements Concrete Forms
June 2006
sions. Allowable variations from specified alignments, grades and dimensions are
prescribed in the following sub -section. Descriptions of these criteria can be found in Part 2
of the ACI Manual of Concrete Practice 1995, Commentary of Standard Specifications for
Tolerances for Concrete Construction and Materials (ACI 117-90).
A. Footings and Foundations
1. Drilled Piers
Vertical alignment < 2 % of the shaft length
Lateral alignment S 1/24 of shaft diameter, 3 inch maximum
Level alignment to cut-off elevation: +1 inch, -3 inch
2. Continuous Wall Footings (Circular and Non -circular)
Lateral alignment: <_ 2% of the footing width, 2 inches maximum
Relative alignment: Variation <_ 1 inch in 10 feet (variation between
specified plane and as built surface)
Cross -sectional dimension:
Horizontal dimension: Variation+2 inch, -1/2 inch
Vertical dimension (thickness): Variation ± 1/2 inch
Circular Wall Footing Only
Variation in Radius in any 20 feet of wall length: <— 1/2 inch
Variation in Radius in entire wall length: S 1 inch
3. Column footings
Lateral alignment: Variation:< 2 inch
Level alignment: Variation from specified elevation +1/2 inch, - 2 inch
Relative alignment: Variation !— 1 inch in 10 feet (variation between
specified plane and as built surface)
Cross -sectional dimension:
Horizontal dimension: Variation+2 inch, -1/2 inch
Vertical dimension (thickness): Variation ± 1/2 inch
B. Cast -in -Place Concrete for Buildings and other Structures
Bobcat Ridge Access Road 03110-6 Structural Cast -In -Place
Improvements Concrete Forms
June 2006
1. Member (such as a beam, column, wall, slab, or pier)
Vertical alignment:
Variation from specified plumb <_ 3/8 inch (full height)
1/4 inch (one form
section)
Lateral alignment:
Maximum in any bay: Variation <_ 1/2 inch
Maximum in any 20 feet of length: Variation <_ 1/2 inch
Maximum for entire wall length: Variation < 1 inch
Floor and wall opening locations: Variation <_ 1/2 inch
Sawcuts and joints: Variation < 3/4 inch
Level alignment:
Top elevation of slabs: Variation < 3/4 inch
Lintels, other lines exposed to view: Variation < 3/4 inch
Cross sectional dimensions:
Walls and slabs (thickness): Variation ±1/4 inch
Columns and Beams: Variation + 1 /2 inch, - 1 A inch
Size of wall and floor openings: Variation ± 1/4 inch
Relative alignment:
Offset between adjacent formwork: Variation ±1/4 inch
Variation in Specified Grade:
For any distance less than 10 feet: Variation < 1/4 inch
For entire structure: Variation ± 1/2 inch
For manholes and outlet structures: Variation < 1 inch
2. Stairways
Relative alignment:
Bobcat Ridge Access Road 03110-7 Structural Cast -In -Place
Improvements Concrete Forms
June 2006
Difference in height between adjacent risers: 1/8 inch
Difference in width between adjacent treads: 1/4 inch
3.04 PLUMB AND STRING LINES
Plumb and string lines shall be installed on wall and column forms before, and maintained,
during concrete placement. There shall be sufficient number of plumb or string lines in walls,
for example at every other stiffback, properly installed to permit continuous monitoring.
During concrete placement, the CONTRACTOR shall continually monitor plumb and string
line positions and immediately correct deficiencies. The plumb and string lines shall extend
to a point at least six inches above the top of wall or column.
3.05 FORMWORK CAMBER
In order to maintain specified tolerances of joists, beams or slabs subject to dead load
deflection, the CONTRACTOR shall camber formwork to compensate for dead load
deflection prior to hardening of the concrete.
3.06 GANG WHALER PLATES FOR CIRCULAR WALLS
The CONTRACTOR shall place a gang whaler plate cut to the curvature of the wall, such as
a circular reservoir wall, at the top of the wall forms. The gang whaler plate shall be
attached to the forms with a gang whaler rod at appropriately designed intervals. The gang
whaler plate may be notched to permit the stiffback to extend above the top of the wall
forms. The gang whaler plate shall be sufficiently stiff to maintain the required curvature.
3.07 HAND SET MODULAR FORMS
Hand set modular forms, such as Symons hand set steel -ply forms, shall be placed with no
more than two intersecting joints occur at one level in the formwork above the bottom
modular form level. The following figure illustrates the required form pattern.
Figure 1
Bobcat Ridge Access Road 03110-8 Structural Cast -In -Place
Improvements Concrete Forms
June 2006
The above form configuration is one way recommended by Simons Corp. to eliminate
vertical, in plane, bending of the forming system. The CONTRACTOR may develop
alternate
means of maintaining vertical alignment. Alternate form system configurations require
preparation by a licensed Professional Engineer in Colorado and submittal to the
ENGINEER for review and approval.
3.08 FORMWORK CLOSURE
Forms which will prohibit visual review of items such as reinforcing steel, waterstops and
bearing pads by the ENGINEER, shall not be placed until the ENGINEER has performed a
final review of the reinforcing steel.
The CONTRACTOR shall use compressed air from an air -compressor to blow-out
construction debris and dirt at the bottom of sections or members to be placed such as walls,
slabs, beams and columns, prior to placing forms or concrete. The CONTRACTOR shall
demonstrate to the ENGINEER that all debris, such as loose concrete particles, saw dust,
loose tie wire, bar tags, tape, trash and dirt, have been thoroughly removed.
3.09 HOT OR COLD WEATHER PLACEMENT AND STEEL FORMS
Prior to placing concrete when steel forms are used, the forms shall be heated when the
surface temperature of the form is below 40' F or cooled when the surface temperature of the
form is above 90' F. If water is used to cool forms where ponding of water may occur, i.e.,
at the bottom of a column, the water shall be permitted to drain prior to placing concrete.
3.10 REMOVAL OF FORMS
The forms for any portion of a structure shall not be removed until the concrete has reach
sufficient strength with a factor of safety of 2.0, to withstand applied loads such as self
weight and wind loads or withstand damage when the forms are removed.
For post -tensioned concrete slabs and beams, formwork shall not be removed until the entire
slab or member has been stressed and stressing records accepted.
3.11 RESHORES
When a reshore plan is to be performed, it shall comply with Section 1.04 of this
Specification.
END OF SECTION
Bobcat Ridge Access Road 03110-9 Structural Cast -In -Place
Improvements Concrete Forms
June 2006
SECTION 01180
UTILITY SOURCES
PART1 GENERAL
1.01 SECTION INCLUDES
A. Names and telephone numbers of affected agencies and utilities in the area are listed
below for the CONTRACTOR's convenience. The CONTRACTOR assumes all
responsibility of contacting these agencies and verification of telephone numbers.
1. Water
a. City of Fort Collins (970) 221-6700
b. Fort Collins — Loveland Water District (970) 226-3104
c. East Latimer Water District (970) 493-2044
2. Sanitary Sewer - City of Fort Collins (970) 221-6700
- Boxelder Sanitation District (970) 498-0604
3. Stormwater — Latimer County Engineering Dept. (970) 498-5700
4. Natural Resources — City of Fort Collins (970) 221-6600
5. Electrical
a. City of Fort Collins
(970) 224-6157
b. Platte River Power Authority (PRPA)
(970) 226-4000
c. Western Area Power Administration (WAPA)
(970) 461-7298
d. Poudre Valley Rural Electric Association (PVREA) (970) 226-1234
e. Public Service Company (PSC) f Xcel Energy
(800) 895-1999
6.
Engineering — Latimer County Engineering Dept.
(970) 498-5700
7.
Traffic — Latimer County Engineering Dept.
(970) 498-5700
8.
Gas - Xcel Energy
(800) 895-2999
9.
Telephone Qwest
(970) 222-2414
10.
Cable TV - Comcast
(970) 484-7166
11.
One -Call Utility Locates
(800) 922-1987
12.
Union Ditch — Ditch Rider Shannon White
(970) 226-4714
PART 2 PRODUCTS (Not Applicable)
PART 3 EXECUTION (Not Applicable)
END OF SECTION
Bobcat Ridge Access Road 01180-1 Utility Sources
Improvements
June 2006
THIS PAGE INTENTIONALLY LEFT BLANK
Bobcat Ridge Access Road 03110-10 Structural Cast -In -Place
Improvements Concrete Forms
June 2006
SECTION 03210
REINFORCING STEEL
PART1 GENERAL
1.01 SECTION INCLUDES
This work shall consist of furnishing and placing reinforcing steel in accordance with these
Specifications and in conformity with the Drawings.
1.02 RELATED SECTIONS
A. Section 03310 — Structural Concrete
1.03 QUALITY STANDARDS
A. American Concrete Institute
1. ACI 318 - Building Code Requirements for Reinforced Concrete
2. ACI Detailing Manual - (SP-66)
3. ACI 117 - Standard Tolerance for Concrete Construction and Materials
B. American Society for Testing and Materials
1. ASTM A 615, A 616 including supplementary requirement S1, A 617, A
706
2. ASTM A 767, Zinc -coated (galvanized) reinforcing bars
3. ASTM A 775 Epoxy -coated reinforcing bars
C. Concrete Reinforcing Steel Institute (CRSI)
1. Manual of Standard Practice
2. Placing Reinforcing Bars
D. American Welding Society (AWS)
1. AWS Dl A - Structural Welding Code - Reinforcing Steel
PART PRODUCTS
2.01 REINFORCING STEEL
A. Deformed Bars:
All bar steel reinforcement shall be of the deformed type, ASTM A 615, (AASHTO
M31) and grade (40 or 60) as specified in the Drawings.
Bobcat Ridge Access Road 03210-1 Reinforcing Steel
Improvements
June 2006
B. Spirals:
Spirals, hot -rolled plain or deformed bars per ASTM A 615, Grade 60 or cold drawn
wire per ASTM A 82 as specified in the Drawings.
Spirals for columns shall have two "spacers" with a section modulus > 0.008in3 in
order to maintain the proper pitch and spacing.
C. Epoxy -Coated Reinforcing Bars:
Epoxy -coated reinforcing bars shall conform to ASTM A 775. When required,
damaged epoxy coating shall be repaired with patching material conforming to
ASTM A 775 in accordance with the material manufacturer's recommendations.
D. Zinc -coated (Galvanized Reinforcing Bars):
Zinc -coated reinforcing bars shall conform to ASTM A 767. When required,
damaged zinc coating shall be repaired with a zinc -rich formulation conforming to
ASTM A 767.
2.02 TIE WIRE
16 gauge wire ties, manufactured by American Wire Tie, Inc., or equal. When epoxy coated
reinforcing steel is shown in the Drawings, PVC coated wire ties shall be used. The
minimum PVC coating is 0.7 mils.
2.03 IDENTIFICATION
Bundles of reinforcing bars and wire spirals shall be tagged, with a metal tag, showing
specification, grade, size, quantity and suitable identification to permit checking, sorting and
placing. When bar marks are used to identify reinforcing bars in the Drawings, the bar mark
shall be shown on the tag. Tags shall be removed prior to concrete placement.
Bundles of flat sheets and rolls of welded wire fabric shall be tagged similar to reinforcing
bars.
2.04 STORAGE AND PROTECTION
Reinforcing steel shall be stored off of the ground and protected from oil or other materials
detrimental to the steel or bonding capability of the reinforcing bar. Epoxy -coated
reinforcing bars shall be stored on protective cribbing.
Rust, seams, surface irregularities, or mill scale, shall not be cause for rejection provided that
the weight and height of deformations of a hand -wire -brushed test specimen are not less than
the applicable ASTM Specification.
When placed in the work, the reinforcing bars shall be free from dirt, loose mill scale, paint,
oil, loose rust or other foreign substance.
Bobcat Ridge Access Road 03210-2 Reinforcing Steel
Improvements
June 2006
2.05 BAR SUPPORTS
A. General:
Bar supports and spacing shall be in accordance with the CRSI Manual of Standard
Practice, Chapter 3, a maximum of four feet or as required by the Drawings.
B. Floor Slabs:
Uncoated steel or non-metallic composite chairs shall be used unless otherwise
shown in the Drawings. If required by the ENGINEER, the chair shall be stapled on
a bearing pad to prevent chair displacement. The bearing pad shall be made of
exterior grade plywood and be approximately five inches square.
C. Soffits:
Steel wire bar supports in concrete areas where soffits are exposed to view or are
painted shall be Class 1 or Class 2, Types A or B: Class 3 is acceptable in other
areas.
D. Water and Wastewater Vaults, Tank and Basin Walls, and Roof Slabs:
Only plastic clip, non-metallic composite or 100% epoxy coated steel chair bar and
bolster supports are acceptable for use in walls and roof slabs. Supports shall be
securely stapled to formwork.
E. Columns:
Plastic "space wheels" manufactured by Aztec (Model DO 12/40), or equal, are
required.
F. Epoxy -Coated and Zinc -Coated Bar Supports:
Epoxy -coated reinforcing bars supported from formwork shall rest on coated wire
bar supports made of dielectric or other acceptable materials. Wire supports shall be
fully coated with dielectric material, compatible with concrete. Reinforcing bars
used as support bars shall be epoxy -coated. In walls reinforced with epoxy -coated
bars, spreader bars shall be epoxy coated. Proprietary combination bar clips and
spreaders used in walls with epoxy -coated reinforcing shall be made of corrosion -
resistant material or coated with dielectric material.
PART 3 EXECUTION
3.01 BAR LIST
Eight copies of a list of all reinforcing steel and bending diagrams shall be furnished to the
ENGINEER at the site of the work at least two weeks before the placing of reinforcing steel
is begun. The CONTRACTOR shall be responsible for the accuracy of the lists and for
furnishing and placing all reinforcing steel in accordance with the details shown on the
Drawings.
Bobcat Ridge Access Road 03210-3 Reinforcing Steel
Improvements
June 2006
Bar lists and bending diagrams for structures, which are included in the Drawings, do not
have to be furnished by the CONTRACTOR. When bar lists and bending diagrams are
included in the Drawings, they are intended for estimating approximate quantities. The
CONTRACTOR shall verify the quantity, size and shape of the bar reinforcement against
those shown on the Drawings and make any necessary corrections before ordering.
3.02 FABRICATION
Fabrication tolerances for straight and bent bars shall be in accordance with the requirements
of Subsection 4.3, Tolerance, of the American Concrete Institute Standard 315 and the CRSI
Manual of Standard Practice.
3.03 BENDING
All reinforcing bars shall be bent cold. Bars partially embedded in concrete shall not be field
bent except as shown on the Drawings or as permitted by the ENGINEER. Bars shall not be
bent or straightened in a manner that will injure the material.
3.04 SPIRALS
One and one-half finishing bends are required at the top and bottom of the spiral. Spacers
shall be provided in accordance with Chapter 5, Section 9 of the CRSI Manual of Standard
Practice. Welding as an aid to fabrication and/or installation is not permitted.
3.05 PLACING AND FASTENING
The placing, fastening, splicing and supporting of reinforcing steel and wire mesh or bar mat
reinforcement shall be in accordance with the Drawings and the latest edition of "CRSI
Recommended Practice for Placing Reinforcing Bars". In case of discrepancy between the
Drawings and the CRSI publication stated above, the Drawings shall govern. Reinforcement
shall be placed within the tolerances provided in ACI 117.
Steel reinforcement shall be accurately placed in the positions shown on the Drawings and
firmly held during the placing and setting of concrete by means of spacer strips, stays, metal
chairs or other approved devices or supports. Chair and bolster supports for slabs and walls
shall be spaced at a maximum of four foot centers unless otherwise shown in the Drawings.
Staples used to attach bar supports to wall and roof forms shall have the staple "tails" clipped
after form removal. For Columns, three wheels, spaced 120 degree apart, shall be placed
every four feet of column height. The CONTRACTOR may increase the column spiral pitch
if a conflict occurs with the wheel. Pre -tied column reinforcing steel lowered into column
forms shall be lowered vertically to prevent damage to the space wheels.
Bars shall be securely tied at 50% of all intersections except where spacing is less than one
foot in each direction, when alternate intersections shall be tied unless otherwise called out
in the Drawings or in applicable specifications. Tying of steel by spot welding will not be
permitted unless specifically authorized by the ENGINEER. The placing and securing of the
reinforcement in any unit or section shall be accepted by the ENGINEER before any
concrete is placed in any such unit or section.
Bundle bars shall be tied together at not more than 6-foot centers.
Bobcat Ridge Access Road 03210-4 Reinforcing Steel
Improvements
June 2006
3.06 SPLICING
Bar steel reinforcement shall be furnished in the full lengths indicated on the Drawings.
Splicing of bars, except where shown on the Drawings, will not be permitted without the
written acceptance of the ENGINEER. Splices shall be staggered. In cases where
permission is granted to splice bars, other than those shown on the Drawings, the additional
material required for the lap shall be furnished by the CONTRACTOR at his own expense.
The minimum distance between staggered splices for reinforcing bars shall be the length
required for a lapped splice in the bar. All splices shall be full contact splices.
Splices will not be permitted at points where the section is not sufficient to provide a
minimum distance of two inches between the splice and the nearest adjacent bar or the
surface of the concrete.
Welding of reinforcement shall be done only if detailed on the Drawings or if authorized by
the ENGINEER in writing. Welding shall be done by a certified welder. The welding shall
conform to AWS D 12.1, Recommended Practices for Welding Reinforcing Steel, Metal
Inserts and Connections in Reinforced Concrete Construction, with the modifications and
additions specified hereinafter. Where AWS D 2.0 Specifications for Welded Highway and
Railway Bridges is referenced, the reference shall be construed to be for AWS D 1.1. Where
the term AWS D1.1 is used it shall mean the American Welding Society Structural Welding
Code, D 1.1 as modified and amended by the AASHTO Standard Specifications for Welding
of Structural Steel Highway Bridges. After completion of welding, coating damage to
coated reinforcing steel bars shall be repaired.
When required or permitted, a mechanical connection may be used to splice reinforcing steel
bars or as substitution for dowel bars. The mechanical connection shall be capable of
developing a minimum of 125% of the yield strength of the reinforcing bar in both tension
and compression. All parts of mechanical connections used on coated bars, including steel
splice sleeves, bolts, and nuts shall be coated with the same material used for repair of
coating damage.
3.07 CUTTING
When coated reinforcing bars are cut in the field, the ends of the bars shall be coated with the
same material used for repair of coating damage. All rebar cut in the field shall be cut with a
cut-off saw, any other method must be approved by the ENGINEER.
END OF SECTION
Bobcat Ridge Access Road 03210-5 Reinforcing Steel
Improvements
June 2006
THIS PAGE INTENTIONALLY LEFT BLANK
Bobcat Ridge Access Road 03210-6 Reinforcing Steel
Improvements
June 2006
SECTION 03310
STRUCTURAL CONCRETE
PART 1 GENERAL
1.01 SECTION INCLUDES
The CONTRACTOR shall furnish all labor, tools and equipment for the construction of
reinforced cast -in -place concrete for sills as shown on the Drawings and herein specified.
This section includes basic finishing and curing methods, accessory control, and expansion
and contraction joint devices.
1.02 CONCRETE PRODUCER QUALIFICATIONS
The ready -mixed concrete supplier to the CONTRACTOR shall have the capability to
produce and deliver concrete, meeting the requirements of the Drawings and Specifications.
The supplier shall have a contingency plan for a back-up plant in the event of a mechanical
malfunction of one of the primary plant(s). This plan shall be submitted in accordance with
Section 01330.
1.03 RELATED SECTION
A. Section 03110 - Structural Cast -In -Place Concrete Forms
B. Section 03210 — Reinforcing Steel
C. Section 03320 - Construction Joints
D. Section 03350 - Concrete Finishing
E. Section 03900 - Concrete Curing
1.04 QUALITY STANDARDS
A. American Society for Testing Materials (ASTM)
1. ASTM C 33 - Concrete Aggregates
2. ASTM C 94 - Ready Mixed Concrete
3. ASTM C 150 - Portland Cement
4. ASTM C 260 - Air -entraining Admixtures for Concrete
5. ASTM C 494 - Chemical Admixtures for Concrete
6. ASTM C 618 - Fly Ash in Portland Cement Concrete
7. ASTM C 979 - Pigments for Colored Concrete
Bobcat Ridge Access Road 03310-1 Structural Concrete
Improvements
June 2006
8.
ANSI/ASTM D 994 - Preformed Expansion Joint Fillers
9.
ASTM D 1751 - Preformed Non -Extruding and Resilient Expansion Joint
Fillers
10.
ASTM D 3575 - Test Methods for Flexible Cellular Materials made from
Olefin Polymers
B. American Concrete Institute (ACI)
1.
ACI 211 - Standard Practice for Selecting Proportions for Concrete
2.
ACI 212 - Guide for Use of Concrete Admixtures
3.
ACI 221 - Guide for Use of Normal Weight Aggregates
4.
ACI 301 - Structural Concrete for Buildings
5.
ACI 304 - Guide for Measuring, Mixing, Transporting and Placing Concrete
6.
ACI 305 - Hot Weather Concreting
7.
ACI 306 - Cold Weather Concreting
8.
ACI 309 - Standard Practice for Consolidating Concrete
9.
ACI 318 - Building Code Requirements for Structural Concrete
10.
ACI 503 - Use of Epoxy Compounds
11.
ACI 504 - Guide to Joint Sealants
1.05 SUBMITTALS
A. Product Data:
1.
Admixtures (such as air -entraining and water -reducing admixtures)
2.
Fly Ash
3.
Form Release Agents
4.
Ready Mixed Concrete Mix Designs
5.
Form Ties
6.
Bonding Agents
7.
Grouts
8.
Vibrator Specifications
Bobcat Ridge Access Road 03310-2 Structural Concrete
Improvements
June 2006
9. Ready -Mixed Concrete Plant Production Contingency Plan
1.06 QUALITY ASSURANCE
A. Acquire cement and aggregate from the same source for all work.
B. Conform to ACI 305 for hot weather concrete placement
C. Conform to ACI 306 for cold weather concrete placement
D. Conform to ACI 309 for concrete consolidation
1.07 CONTRACTOR ASSISTANCE
The CONTRACTOR shall assist the OWNER or his concrete testing consultant as requested
during the performance of quality control testing. When concrete is placed using a concrete
pumper, concrete for testing will be taken from the pumper discharge hose.
1.08 DELIVERY, STORAGE, AND HANDLING
A. Ready -Mixed Concrete Delivery Ticket:
The ready -mixed concrete truck driver shall provide the batch ticket to the
ENGINEER at the time of concrete delivery. The ticket shall summarize the
following information legibly in an easily discernible table:
1. Weight in pounds of all materials, excepting the water reducing and air -
entraining agents which shall be in ounces.
2. Cubic yards batched
3. The ratio of water to cementitious (W / C) materials ratio
4. Temperature of the concrete at the time it was batched
5. Time of batching.
6. Free moisture in the fine and coarse aggregates in percent of weight of
aggregate.
7. Gallons of water that may be added at the site without exceeding the
permissible W / C ratio.
B. Delivery:
Delivery shall conform to the recommendations of ACI 304 as determined by the
ENGINEER.
Bobcat Ridge Access Road 03310-3 Structural Concrete
Improvements
June 2006
THIS PAGE INTENTIONALLY LEFT BLANK
Bobcat Ridge Access Road 01180-2 Utility Sources
Improvements
June 2006
PART PRODUCTS
2.01 CEMENT
Cement shall be Portland Cement Type II, unless otherwise indicated on the Drawings.
2.02 AGGREGATE
A. Fine Aggregate:
Fine aggregate shall consist of hard, strong, durable particles to the provisions of
ASTM C 33.
B. Coarse Aggregate:
Coarse aggregate shall conform to the provisions of ASTM C 33 except that all
aggregate shall be crushed aggregate. Screened aggregate is unacceptable.
2.03 WATER
Water shall be clean and free from injurious amounts of oils, acids, alkalis, salts, organic
materials, or other substances that may be deleterious to concrete or steel. Mixing water for
prestressed pretensioned and prestressed post -tensioned concrete or for concrete which will
contain aluminum embedments, shall not contain deleterious amounts of chloride ion.
Unless otherwise permitted or specified in the Drawings, the concrete shall be proportioned
and produced to have a slump not to exceed four inches or less than two and one-half inches.
Concrete not consolidated by internal vibration shall be proportioned to have a slump not to
exceed five and one-half inches or less than four inches. The slump shall be determined by
the "Test for Slump of Portland Cement" ASTM C 143.
2.04 ADMIXTURES
Admixtures to be used in concrete shall be subject to prior acceptance by the ENGINEER.
The admixture shall maintain the same composition and performance throughout the work as
the product used in the concrete proportions established in accordance with ACI 211.
Admixtures containing chloride ions shall not be used.
A. Air Entrainment:
An air -entraining agent shall be used in all concrete. The agent used shall conform
to ASTM C 260.
Unless otherwise shown in the Drawings, the amount of air entraining agent used in
each concrete mix shall be such as will effect the entrainment of the percentage of
air shown in the following tabulation in the concrete as discharged from the mixer.
This table is applicable for concrete strengths less than 5000 psi.
Bobcat Ridge Access Road 03310-4 Structural Concrete
Improvements
June 2006
Table 1
Nominal
max. Average air content, percent
aggregate
size, in.
Severe exposure Moderate
exposure
3/8 7 1/2 ± 1 1/2 6 ± 1 1/2
'/< 6±11/2 5±11/2
1 1/2 5 1/2 ± 1 1/2 4 1/2 ± 1 1/2
The level of exposure will be determined by the ENGINEER.
B. Water Reducing, Set -Controlling Admixture:
The CONTRACTOR shall use a "mid -range" water reducing, set controlling
admixture, Polyheed 997, or equal. The water -reducing admixture shall be used in
all concrete and shall conform to ASTM C 494, specifically Types A, B, C, D and E.
C. Finely Divided Mineral Admixtures:
Mineral admixtures shall be limited to fly ash conforming to ASTM C 618, Class C.
2.05 BATCHING
Measuring and batching of materials shall be done at a batching plant.
A. Portland Cement:
Either sacked or bulk cement may be used. No fraction of a sack of cement shall be
used in a batch of concrete unless the cement is weighed. Bulk cement shall be
weighed on scales separate and distinct from the aggregate hopper or hoppers.
Batching shall be such that the accuracy of batching shall be plus or minus one
percent of the required weight.
B. Water:
Unless water is to be weighed, the water -measuring equipment shall include an
auxiliary tank from which the measuring tank shall be filled. In lieu of the volume
method, the CONTRACTOR will be permitted to use a water -metering device.
C. Aggregates:
Aggregates shall be handled from stockpiles or other sources to the batching plant in
such a manner as to secure a uniform grading of the material. Aggregates that have
become segregated, or mixed with earth or foreign material, shall not be used.
Batching shall be so conducted as to result in the weights of material required for
each type aggregate within a tolerance of two percent.
Free water contents of the coarse and fine aggregates shall be continuously tested
Bobcat Ridge Access Road 03310-5 Structural Concrete
Improvements
June 2006
and concrete mixture adjusted for moisture conditions of the aggregate in order to
meet the designated water/cement ratio.
D. Fine Aggregate:
The proportion of fine aggregate shall be between 36 and 44 percent by volume of
the total aggregates in the concrete.
2.06 MIXING
Ready -mixed concrete shall be either "central mixed" or "shrink mixed" concrete as defined
in ASTM C 94. "Truck mixed" concrete as defined in ASTM C 94 shall not be permitted.
Mixing time shall be measured from the time water is added to the mix, or cement contracts
the aggregate. All concrete shall be homogeneous and thoroughly mixed, and there shall be
no lumps or evidence of undispersed cement. Mixers and agitators, which have an
accumulation of hard concrete or mortar, shall not be used. Ready -mixed concrete shall be
mixed and transported in accordance with ASTM C 94.
The temperature of mixed concrete, immediately before placing shall not be less than 50°F
or more than 80°F for slabs larger than 10,000 square feet and not be less than 50°F or more
than 85°F for walls. Aggregates and water shall be heated or cooled as necessary to produce
concrete within these temperature limits. Neither aggregates nor mixing water shall be
heated to exceed 150°F.
The time elapsing from the time water is added to the mix (or the cement comes in contact
with aggregate) until the concrete is deposited in place at the site of the work shall not
exceed 45 minutes when the concrete is hauled in non -agitating trucks, nor more than 90
minutes when hauled in truck mixers or truck agitators.
The batch shall be so charged into the drum that a portion of the mixing water shall enter in
advance of the cement and aggregates. The flow of water shall be uniform and all water shall
be in the drum by the end of the first 1/4 of the specified mixing time.
Cement shall be charged into the mixer by means that will not result in loss of cement due to
the effect of wind, or in accumulation of cement on surfaces of hoppers or in other
conditions which reduce or vary the required quantity of cement in the concrete mixture.
2.07 TRANSPORTING MIXED CONCRETE - MIXED CONCRETE OR TRUCK MIXERS
Transporting of mixed concrete shall conform to ASTM C 94.
Truck agitators shall be loaded not to exceed the manufacturer's guaranteed capacity. They
shall maintain the mixed concrete in a thoroughly mixed and uniform mass during hauling.
No additional mixing water shall be incorporated into the concrete during hauling or after
arrival at the delivery point, unless approved. If additional water is to be incorporated into
the concrete at the site, the drum shall be revolved not less than 30 revolutions at mixing
speed after the water is added and before discharge is commenced. One addition of water at
the site to adjust mix workability is permitted but the maximum water cement ratio shall not
be exceeded.
Bobcat Ridge Access Road 03310-6 Structural Concrete
Improvements
June 2006
The CONTRACTOR shall furnish a water -measuring device in good working condition,
mounted on each transit mix truck, for measuring the water added to the mix on the site. All
water tanks on transit mix trucks shall be filled prior to being batched and arrive at the
construction site 100% full.
Each load of ready mixed concrete delivered at the job shall be accompanied by the ticket
referencing design mix and showing volume of concrete, the weight of cement in pounds,
percent of free water in coarse and dry aggregates, and the total weight of all ingredients in
pounds. The ticket shall also show the time of day at which the materials were batched and
the reading of the revolution counter at the time the truck mixer is charged. See Paragraph
1.08.
2.08 COMPRESSIVE STRENGTH
Concrete compressive strength requirements consist of a minimum strength that must be
obtained before various loads of stresses are applied to the concrete and, for concrete
designated by strength, a minimum strength at the age of 28 days. Unless otherwise shown
on the Drawings the 28-day compressive strength of structural concrete shall be a minimum
of 4,500 psi. Portland cement concrete pavement shall have a 28-day compressive strength
of structural concrete shall be a minimum of 4,200 psi and have a modulus of rupture of third
point loading of 600 psi (CDOT Class P). Non-structural concrete such as manhole bases,
kickblocks, cut-off walls, equipment pads, valve box collars, fence post foundations, pipe
cradles, etc., shall have a minimum 28-day compressive strength of 3,000 psi.
The mix shall be designed for required strengths in accordance with ACI 301. The ratio of
water to the sum of concrete + pozzolan shall not exceed 0.41 by weight for durable,
watertight, concrete. The amount of fly ash in the mix shall be between 15 and 20 percent by
weight of the total cementitious materials.
2.09 CONCRETE VIBRATORS
Concrete vibrators for consolidating concrete shall be 2 1/2 inch diameter "high cycle"
vibrators with a frequency under load of 8,000 - 10,400 vibrations per minute (vpm).
Concrete vibrators of lesser capacity are unacceptable for use in any part of the construction.
The CONTRACTOR shall have at least one standby concrete vibrator ready for use for every
two concrete vibrators in use during a concrete placement.
PART 3 EXECUTION
3.01 PRIOR TO PLACEMENT
Prior to placing concrete the CONTRACTOR shall remove all debris and thoroughly
dampen the surfaces that will be in contact with the concrete to be placed.
The CONTRACTOR shall use compressed air from an air -compressor to blow-out
construction debris and dirt at the bottom of members to be placed such as walls, beams and
columns, prior to final placement of forms that will obscure any joint. The CONTRACTOR
shall demonstrate to the ENGINEER that all debris, such as concrete particles, saw dust,
loose tie wire, bar tags, tape, trash and dirt, have been thoroughly removed.
No concrete shall be placed when form surfaces that will be in contact with the concrete,
Bobcat Ridge Access Road 03310-7 Structural Concrete
Improvements
June 2006
reinforcement, embedded items or sub -base is less than 32°F. When the mean daily outdoor
temperature is less than 407, the temperature of the concrete shall be maintained between
50°F and 707 for the required curing period. When necessary, arrangements for heating,
covering, insulating, or housing the concrete work shall be made in advance of placement
and shall be adequate to maintain the required temperature without injury due to
concentration of heat. Combustion heaters shall not be used during the first 24 hours unless
precautions are taken to prevent exposure of the concrete to exhaust gases which contain
carbon dioxide.
Concrete shall not be placed against forms exposed to heating by the unless the temperature
of the forms is first cooled to 5 90°F.
3.02 PLACEMENT
Placement shall conform to ACI 301, Chapter 8 "Placing", ACI 304R, "Guide of Measuring,
Mixing, Transporting and Placing Concrete," ACI 306 "Recommended Practice for Cold
Weather Concreting", ACI 305 "Recommended Practice for Hot Weather Concreting" and
ACI 309, "Standard Practice for Consolidation of Concrete". No concrete shall be placed
until all formwork, reinforcement, installation of parts to be embedded, bracing of forms,
and preparation of surfaces involved in the placing have been reviewed by the ENGINEER.
No concrete shall be placed in water except with the written permission of the ENGINEER.
All surfaces of forms and embedded materials that have become encrusted with dried mortar
or grout from concrete previously placed shall be cleaned of all such mortar or grout before
the surrounding or adjacent concrete is placed. Immediately before placing concrete, all
surfaces upon or against which the concrete is to be placed shall be free from standing water,
mud, debris or loose materials. The surfaces of absorptive materials against or upon which
concrete is to be placed shall be moistened thoroughly so that moisture will not be drawn
from the freshly placed concrete. The concrete shall be placed by equipment that will
prevent segregation or loss of ingredients. The stream of concrete shall not be allowed to
separate by permitting it to fall freely over rods, spacers or other embedded materials.
No wetting of concrete surfaces during slab finishing operations shall be permitted. Further,
no concrete finishing operation shall be permitted while there is water on the surface of slabs
and other flatwork.
Unless otherwise called out in these Specifications or shown in the Drawings, the placement
lift depth of concrete in walls shall be limited to two feet or less to minimize surface defects
such as air voids that can form on concrete surfaces. Lift depths will be limited to one foot
if, in the opinion of the ENGINEER, the quality of the finish is unacceptable at the 2-foot lift
depth.
3.03 CONSOLIDATION
All concrete shall be thoroughly consolidated with internal vibrators as recommended in ACI
309 immediately after deposition. The concrete shall be thoroughly worked around the
reinforcing steel, around embedded items and into comers of forms. Vibration shall be
supplemented by spading, rodding or forking to eliminate all honeycomb and voids around
embedded items.
The vibrator shall be inserted vertically, allowing it to penetrate rapidly to the bottom of the
lift and at least six inches into the previous lift. The vibrator shall be held at the bottom of
Bobcat Ridge Access Road 03310-8 Structural Concrete
Improvements
June 2006
lift for 5 to 15 seconds. The vibrator shall be pulled up at a rate of about three inches per
second.
The vibrator shall be inserted so that the fields of action overlap. The field of action is
approximately eight times the vibrator's head diameter. Thus for a 2 1/2 inch diameter
vibrator, the spacing of each insertion will be approximately 20 inches.
Vibration shall be stopped when the concrete surface takes a sheen and large air bubbles no
longer escape.
Do not use a vibrator to move concrete horizontally.
3.04 OPENINGS AND INSERTS
Pipe sleeves, inserts for pipe connections, anchors and forms for pipe holes must be
accurately placed and securely fastened to the forms in such a manner that the placing of
concrete will not alter their alignment or location. In the event that openings are
inadvertently omitted or improperly placed, the ENGINEER may require the concrete to be
cored at the proper location. Filling of improperly placed openings shall be done with
expansive grout or dry pack or mortar applied with an accepted epoxy adhesive. The
surfaces of the opening shall be roughened prior to filling.
3.05 EMBEDDED ITEMS
At the time of concrete placement, embedded items should be clean and free from mud, oil
and other coatings that may adversely affect bonding capacity. Aluminum embedments shall
be coated with a bituminous material to prevent electrolytic action between the embedded
item and reinforcing steel that results in concrete deterioration. Embedment items shall be
accurately placed and securely fastened to the forms in such a manner that the placing of
concrete will not alter their alignment or location. Contact between embedded items and
reinforcing steel or tendon ducts is unacceptable and is not permitted.
3.06 CONSTRUCTION JOINTS
The location of all construction joints will be subject to the acceptance of the ENGINEER.
The surface of all construction joints shall be thoroughly cleaned and all laitance and
standing water removed. Clean aggregate shall be exposed by abrasive blast cleaning. Wire
brushing and air water jets may be used while concrete is fresh provided results are equal to
abrasive blast cleaning. Construction joints shall be keyed at right angle to the direction of
shear. Except where otherwise shown on the Drawings, keyways shall be at least 1-1/2" in
depth over at least 25% of the area of the section.
3.07 EVAPORATIVE RETARDANT
The use of an evaporative retardant is required to assist in proper placement of concrete. See
Section 03390. When an evaporative retardant is used, it shall be applied two times: after
screeding and after the first floating operation. The retardant should be applied at a rate of
one gallon of sprayable solution per 200 - 400 square feet by spraying with an industrial type
sprayer. If the nozzle of the sprayer becomes plugged, the CONTRACTOR shall clean, or
replace, the nozzle. Under no circumstances shall the retardant be used except by spraying a
Bobcat Ridge Access Road 03310-9 Structural Concrete
Improvements
June 2006
mist with a nozzle. The retardant shall be applied in strict conformance with the
manufacturer's recommendations and precautions. In no case shall the retardant be used as a
finishing agent. The use of an evaporative retardant requires review and approval by the
ENGINEER.
END OF SECTION
Bobcat Ridge Access Road 03310-10 Structural Concrete
Improvements
June 2006
SECTION 03320
CONSTRUCTION JOINTS
PART1 GENERAL
1.01 SECTION INCLUDES
The CONTRACTOR shall supply all labor, tools, equipment and material for the preparation
of construction joints in concrete in accordance with these specifications and as shown in the
Drawings. This includes joints such as column -footing joints, wall construction joints,
column capital -slab joints, grout closures around pipe -slab penetrations and footing -slab
joints.
1.02 RELATED SECTIONS
A. Section 03110 - Structural Cast -In -Place Concrete Forms
B. Section 03210 - Reinforcing Steel
C. Section 03310 - Structural Concrete
D. Section 03615 - Grout
1.03 QUALITY STANDARDS
A. American Concrete Institute (ACI)
ACI 117 - Standard Tolerance for Concrete Construction and Materials
2. ACI 301 - Specifications for Structural Concrete for Buildings
3. ACI 302 - Guide for Concrete Floor and Slab Construction
4. ACI 318 - Building Code Requirements for Structural Concrete
1.04 CONSTRUCTION REVIEW
The ENGINEER shall review the preparation of all construction joints prior to concrete and
grout closure placements. It is the responsibility of the CONTRACTOR to notify and
provide a minimum of 24 hours notice to the ENGINEER of these activities. If joint
placement is performed without the ENGINEER's presence, the work will be deemed
unacceptable and non -conforming to these specifications. If the ENGINEER determines that
construction review of a particular activity is unnecessary, he will provide written direction
to the CONTRACTOR to proceed with that particular activity without his construction
review.
PART 2 PRODUCTS (Not Applicable)
Bobcat Ridge Access Road 03320-1 Construction Joints
Improvements
June 2006
PART 3 EXECUTION
3.01 SURFACE PREPARATION
The surface of concrete construction joints shall be clean and all materials that inhibit bond,
such as curing compounds, laitance, saw dust, wood, dirt, polyethylene, pipe tape coating
and paper shall be removed. Concrete shall be roughened to produce a rough, plus or minus
l/16 inch, surface texture. Concrete surfaces shall be wetted with clean potable water and
standing water removed immediately before new concrete or closure grout is placed. Unless
otherwise called out in the Drawings, a bonding agent shall be used prior to placing the
concrete or grout.
3.02 PIPE GROUT CLOSURE SECTIONS
A. Pipe Surface Preparation
Unless otherwise detailed in Drawings, all pipes penetrating concrete sections such
as wall and floor slabs shall have all coatings and other materials that can inhibit
bond completely removed from the portion of the pipe to be in contact with the
concrete or slab closure grout.
B. Ground Surface Preparation
The ground surface at joints such as pipe / slab closures shall be smooth and
properly graded and compacted. All debris such as Styrofoam-rm, paper,
polyethylene and wood shall be removed. The ground surface shall be dampened
and prepared to prevent the inclusion of dirt, pieces of aggregate or balls of soil in
the concrete or grout.
3.03 CONCRETE AND CLOSURE GROUT PLACEMENT
Mixing, surface preparation in addition to that prescribed above, placement, and curing of
grout at pipe closure joints shall be performed in strict accordance with Specification Section
03615 and when a proprietary grout is specified, with the grout manufacturer's directions.
Special care shall be taken to insure that the grout is thoroughly and properly consolidated at
waterstops, pipe weep rings, and existing concrete surfaces. An appropriate capacity
vibrator shall be used when necessary or required by the manufacturer to properly
consolidate the grout.
END OF SECTION
Bobcat Ridge Access Road 03320-2 Construction Joints
Improvements
June 2006
SECTION 03350
CONCRETE FINISHING
PART1 GENERAL
1.01 SECTION INCLUDES
The CONTRACTOR shall supply all labor, tools, equipment and materials to finish properly
placed concrete for structures such as box culverts, vaults, foundations, hydraulic and water
retaining structures.
The means and methods of repair of improperly placed or finished concrete shall be
reviewed by the ENGINEER prior to performing the work. Regardless of prior approval of
the means and methods of concrete finish repair, no concrete finish shall be repaired until the
ENGINEER has reviewed the existing finish. This includes defects caused by ineffective
and improper vibration such as honeycomb, excessive air voids on formed surfaces,
placement "pour" lines (cold joints) and sand streaking. It also includes defects caused by
excessive form deflections, form damage or form failure.
Unless otherwise called out in the Drawings tie holes shall be finished as specified herein.
1.02 RELATED SECTIONS
A. Section 03110 - Structural Cast -In -Place Concrete Forms
B. Section 03310 - Structural Concrete
C. Section 03615 - Grout
1.03 QUALITY STANDARDS
A. American Concrete Institute
ACI 116 - Cement and Concrete Terminology
2. ACI 121 - Quality Assurance Systems for Concrete Construction
3. ACI 301 - Specifications for Structural Concrete for Buildings
4. ACI SP-15 - ACI 301 Field Reference Manual
5. ACI 304 - Placing Concrete by Pumping Methods
6. ACI 309 - Identification and Control of Consolidation -Related Surface
Defects in Formed Concrete
7. ACI 311 - Guide for Inspection of Concrete
B. American Society for Testing and Materials
1. ASTM STP 169C - Significance of Tests and Properties of Concrete and
Concrete -Making Materials
Bobcat Ridge Access Road 03350-1 Concrete Finishing
Improvements
June 2006
SECTION 01310
PROJECT MEETINGS
PART1 GENERAL
1.01 SECTION INCLUDES
A. Pre -Construction Conference: A Pre -Construction Conference will be held before
construction commences, the date, time and location of which will be determined by
the OWNER.
The conference shall be attended by:
1. CONTRACTOR and CONTRACTOR's Superintendent
2. CONTRACTOR's and Subcontractors
3. ENGINEER
4. OWNER
5. Others as requested by the CONTRACTOR, OWNER, or ENGINEER.
Unless previously submitted to the OWNER, the CONTRACTOR shall bring to the
conference a tentative schedule of the construction project, including the scheduled
shop drawings and other submittals.
The purpose of the conference is to designate responsible personnel and establish a
working relationship. Matters requiring coordination will be discussed and
procedures for handling such matters established. The agenda will include:
1. CONTRACTOR's tentative Schedule
2. Permit applications and submittals, including 402 Permit, Erosion and
Sediment Control Plan, and Traffic Control Plan
3. Transmittal, review and distribution of CONTRACTOR's submittals
4. Processing applications for payment
5. Maintaining record documents
6. Critical work sequencing
7. Field decision and change orders
8. Use of premises, office and storage areas, staging area, security,
housekeeping, and OWNER's needs
9. CONTRACTOR's assignment of safety and first aid
Bobcat Ridge Access Road 01310-1 Project Meetings
Improvements
June 2006
2. ASTM C 150 - Standard Specification for Portland Cement
3. ASTM C 33 - Concrete Aggregates
C. US Department of Interior - Bureau of Reclamation
1. M-47 Standard Specifications for Repair of Concrete
1.04 SUBMITTALS
A. General
Submittals shall be made in accordance with Section 01330.
B. Product Data
1. Grouts
2. Bonding agents
3. Means and methods of repairing defects unless otherwise called out herein.
C. Manufacturer's safety data sheets
1.05 DELIVERY, STORAGE AND HANDLING
Deliver the materials to the project site in the manufacturer's containers with all labels intact
and legible at the time of use. Materials shall be stored in a secure, indoor, dry area.
Maintain grouts and aggregates in a dry condition during delivery, storage, and handling.
PART PRODUCTS
2.01 PREMIXED PRE -PACKAGED GROUTS
A. Master Builders EMACO R320
B. Master Builders EMACO S66-CR
2.02 EPDXY BONDING AGENTS
A. Master Builders Concresive Liquid (LPL)
B. Master Builders Concresive Standard Liquid
2.03 CEMENT
ASTM C 150, Type 1
2.04 AGGREGATE
ASTM C 33, 100% passing the No. 30 mesh sieve
Bobcat Ridge Access Road 03350-2 Concrete Finishing
Improvements
June 2006
2.05 BOND COAT MORTAR
Mortar used to bond patching mortar shall be made of the same materials and of
approximately the same proportions as used for the concrete, except that the coarse
aggregate shall be omitted and the mortar shall consist of 1 part cement to not more than 1
part sand by damp loose volume.
2.06 PATCHING MORTAR
Patching mixture shall be made of the same materials and of approximately the same
proportions as used for the concrete, except that the coarse aggregate shall be omitted and
the mortar shall consist of 1 part cement to not more than 2-1/2 parts sand by damp loose
volume. White Portland Cement shall be substituted for a part of the gray Portland Cement
on exposed concrete in order to produce a color matching the color of the surrounding
concrete, as determined by a trial patch. The quantity of mixing water shall be no more than
necessary for handling and placing. The patching mortar shall be mixed in advance and
allowed to stand with frequent manipulation with a trowel, without addition of water, until it
has reached the stiffest consistency that will permit placing.
2.07 WATER
Only clean potable water shall be used. A calibrated measuring device is required for
measuring the proper amount of water to be added to pre -packaged grouts and mortars.
PART 3 EXECUTION
3.01 REPAIR OF SURFACE DEFECTS
Surface defects, unless otherwise specified by the Contract Documents, shall be repaired
immediately after form removal but not before review by the ENGINEER. The surface
temperature of the concrete shall be 50° F and rising. The CONTRACTOR shall measure
surface temperatures when requested by the ENGINEER. If necessary the CONTRACTOR
shall enclose and heat the area to be repaired to bring the surface temperature of the concrete
and air temperature to acceptable levels and to permit proper curing.
All honeycombed and other defective concrete shall be removed down to sound concrete. If
chipping is necessary, the edges shall be perpendicular to the surface or slightly undercut.
Feathered edges will not be permitted. The area to be patched and an area at least six inches
wide surrounding it shall be dampened to prevent absorption of water from the patching
mortar. A bonding grout shall be prepared, mixed to the consistency of thick cream, and
after surface water has evaporated from the area to be patched, well brushed into the surface.
When the bond coat begins to lose the water sheen, the premixed patching mortar shall be
applied. The mortar shall be thoroughly consolidated into place and struck off so as to leave
the patch slightly higher than the surrounding surface. To permit initial shrinkage, it shall be
left undisturbed for at least one hour before being finally finished. The patched area shall be
kept damp for seven days. Metal tools shall not be used in finishing a patch in a formed wall
that will be exposed.
3.02 TIE HOLES
A. Water Retaining Structures and Below Grade Vaults with Breakback Cone Ties
Bobcat Ridge Access Road 03350-3 Concrete Finishing
Improvements
June 2006
Fill tie holes solid as specified in Section 03615.
B. Other Structures
After being cleaned and thoroughly dampened, fill tie holes solid as specified in
Section 03615.
3.03 PROPRIETARY MATERIALS
Certain types of defects may require the use proprietary compounds for adhesion or as
patching ingredients. The ENGINEER will review these defects and request means and
methods for these repairs from the CONTRACTOR.
In lieu of, or in addition to, the foregoing patching procedures using bond coat and patching
mortars, epoxy bonding agents and premixed pre -packaged grouts may be used for repair of
defective areas. Such compounds shall be used in accordance with the manufacturer's
written recommendations and directions. The ENGINEER shall review and provide written
acceptance of these procedures.
3.04 FINISHING OF FORMED AND UNFORMED SURFACES
Finishes shall be performed as called out in the Drawings and in referenced Specifications.
A. Formed Surfaces
Smooth Form Finish
The form facing material shall produce a smooth, hard, uniform texture on
the concrete. The arrangement of the facing material shall be orderly and
symmetrical, with the number of seams kept to the practical minimum.
Surface textures that result from forms with raised grain, torn surfaces, worn
edges, patches, dents, or other defects shall be ground smooth or otherwise
repaired.
a.
b
C.
Air Voids on Formed Surfaces
Air voids on formed surfaces deeper than 1/4 inch shall be filled
with patching mortar. The frequency and size of air voids shall be
equal to or better than shown in Figure 1. The total void area is 1 %
of the surface area, or 0.36 sq. in. This 6-inch x 6-inch figure is the
visual standard for acceptance of the finish that does not require
filling of air voids.
Tie Holes
Tie holes shall be filled as specified in section 03615.
Form Fins
Chip or rub -off form fins exceeding 1/16 inch in height.
Bobcat Ridge Access Road 03350-4 Concrete Finishing
Improvements
June 2006
Figure 1
d. Rock Pockets
Poorly consolidated concrete shall be removed to sound concrete
and the defect repaired. The ENGINEER shall outline the area to be
repaired.
2. As -Cast Finish
For as -cast concrete finish form materials shall produced a sound surface.
Bobcat Ridge Access Road 03350-5 Concrete Finishing
Improvements
June 2006
a. Air Voids
Fill air voids deeper than 1/4 inch. and larger than 0.50 sq. in. The
total area of acceptable air voids is 0.72 sq. in. in a 6 inch by 6-inch
square.
b. Tie Holes
Tie holes shall be filled as specified in section 03615.
C. Form Fins
Chip or rub -off form fins exceeding 1/8 inch in height.
3. Rubbed Finish
Immediately after removing the forms, form ties shall be broken back a
minimum of 3/4 inch from the surface, honeycomb, voids and other surface
defects grouted. The surfaces shall then be thoroughly dampened and
rubbed with a No. 16 carborundum stone or equal abrasive to create a
uniform surface paste. The rubbing shall be continued to remove all form
marks and surface irregularities producing a smooth, dense surface. After
setting, the surface shall then be rubbed with a No. 30 carborundum stone
until the surface is smooth in texture and uniform in color. Unless otherwise
shown in the Drawings only exposed surfaces shall have a rubbed fmish.
4. Grout Finish
Prepare surface as described in Rubbed Finishes above. Mix one part
Portland cement and one-half parts fine sand with sufficient water to
produce a grout with the consistency of thick paint. Wet surface of concrete
to prevent absorption of water from grout and apply grout uniformly with
brushes. Immediately after applying grout mix, scrub the surface with a
cork float or stone to coat surface and fill remaining air voids and other
remaining surface defects. Remove excess grout by working the surface
with rubber float. After the surface whitens from drying, rub with clean
burlap. Cure surface for a period of 72 hours
B. Unformed Surface
Unless otherwise shown in the Drawings unformed surfaces shall be finished as
follows.
1. Slabs
Screed with straightedge to remove low and high spots bringing the surface
to the required fmish elevation of slope and float with a steel float at least 3
feet in width. When the concrete has reached its initial set, finish with a
steel (power) trowel. Leave finish essentially free of trowel marks, uniform
in texture and appearance and plane to the correct tolerance. Dusting the
surface with dry cement, sand or sprinkling with water is prohibited
Bobcat Ridge Access Road 03350-6 Concrete Finishing
Improvements
June 2006
Finishes that are exposed and subject to foot traffic shall receive a broom
finish with a texture of ± 1/16 inch.
2. Tops of Walls with Bearings
Strike smooth tops of walls and similar unformed surfaces that will have
bearings or bearing pads, and finish with a steel trowel.
3. Tops of Exposed Footings in Reservoirs
Strike smooth tops of footings and finish with a light broom providing a
texture of ± 1/16 inch.
4. Stairways and Sidewalks
Strike smooth tops of stairs and sidewalks and finish with a light broom
providing a texture of ± 1/16 inch.
5. Slabs with Waterproofing Membranes
Strike smooth and float finish.
6. Construction Joint Surfaces
Surface shall be broom or raked finished. Surface shall be water or grit
blasted prior to placing additional concrete, such as columns on column
footings and column footings on reservoir slabs.
END OF SECTION
Bobcat Ridge Access Road 03350-7 Concrete Finishing
Improvements
June 2006
THIS PAGE INTENTIONALLY LEFT BLANK.
,"N
Bobcat Ridge Access Road 03350-8 Concrete Finishing
Improvements
June 2006
SECTION 03390
CONCRETE CURING
PART 1 GENERAL
1.01 WORK INCLUDED
The CONTRACTOR shall furnish all labor, tools and equipment for curing plain and
reinforced cast -in -place concrete.
1.02 RELATED WORK
A. Section 03310 — Structural Concrete
B. Section 03320 — Construction Joints
C. Section 03350 — Concrete Finishing
1.03 QUALITY STANDARDS
A. American Concrete Institute (ACI)
1. ACI 305 - Hot Weather Concreting
2. ACI 306 - Cold Weather Concreting
3. ACI 308 - Standard Practice for Curing Concrete
B. American Society for Testing Materials (ASTM)
1. ASTM C 171 — Sheet Materials for Curing Concrete
2. ASTM C 309 — Liquid Membrane -Forming Compounds for Curing Concrete
3. ASTM D 2103 — Polyethylene Film and Sheeting
1.04 SUBMITTALS
Provide data on curing compounds sheet materials and methods of securing sheet materials in
place.
1.05 QUALITY CONTROL
Perform the work in accordance with this Specification and in accordance with applicable
ACI standards. When a conflict occurs between this Specification and ACI occurs, the ACI
standard shall control. The CONTRACTOR shall have a copy of the current applicable ACI
standards on site. All materials shall be used in accordance with the manufacturer's printed
instructions, a copy of which shall be on site.
Bobcat Ridge Access Road 03390-1 Concrete Curing
Improvements
June 2006
1.06 DELIVERY, STORAGE AND HANDLING
Deliver, store and handle products under the provisions of Section 01650.
Deliver curing materials in manufacturer's original packaging including applicable
instructions and manufacturer's safety data sheets (MSDS).
PART PRODUCTS
2.01 SHEET MATERIALS FOR CURING CONCRETE
White burlap -polyethylene sheeting weighing not less than 10 oz/linear yard, 40 inches wide,
impregnated on one side with white opaque polyethylene 0.004 inches thick as specified in
ASTM C 171 shall be used when called out in the Drawings or in other applicable
specifications. The polyethylene shall be securely bonded to the burlap so that there will be
no separation.
2.02 LIQUID MEMBRANE -FORMING COMPOUNDS FOR CURING CONCRETE
Liquid membrane -forming compounds for curing concrete shall and conform to ASTM C
309, Type 1-D with a red or white fugitive dye. Use a white dye unless otherwise directed by
the ENGINEER.
2.03 POLYETHYLENE FILM
Polyethylene film shall conform to ASTM D 2103. The film shall have a thickness of 6 mils
and be a white opaque color.
2.04 LIQUID MEMBRANE FORMING COMPOUND AND EVAPORATIVE RETARDANT
APPLICATORS/ SPRAYERS
Membrane curing and evaporative retardant compounds shall be applied with a sprayer
manufactured by Allen Engineering, Inc., or equal, capable of maintaining a constant
pressure. (Allen Engineering, Inc., P.O. Box 819, Paragould, Arizona 74450, telephone (800)
643-0095.) Unless otherwise accepted in writing by the ENGINEER, spraying membrane
curing compounds or evaporative retardants by other methods, such as hand pressurized
sprayers, is unacceptable.
2.05 EVAPORATIVE RETARDANT
Confihn manufactured by Master Builders, Inc. or approved equal.
2.06 WATER
Water shall only be used when prior approval is granted by the ENGINEER. Only water that
has been determined to be non -detrimental to concrete shall be used.
Bobcat Ridge Access Road 03390-2 Concrete Curing
Improvements
June 2006
PART EXECUTION
3.01 GENERAL
Beginning immediately after placement, concrete shall be protected from premature drying,
excessively hot or cold temperatures, and mechanical injury, and shall be maintained with
minimal moisture loss at a relatively constant temperature for the period necessary for
hydration of the cement and hardening of the concrete in accordance with ACI 308,
"Standard Practice for Curing Concrete". The materials and method of curing shall be subject
to review and acceptance by the ENGINEER. Specific curing requirements may be called
out on the Drawings or other Technical Specifications.
Curing shall be continued for at least seven days. Alternatively, if tests are made of cylinders
kept adjacent to the structure and cured by the same methods, moisture retention measures
may be terminated when the average compressive strength has reached 70% of the specified
concrete strength.
When a spray applied membrane -curing compound is used, it shall be applied in two coats
with the second coat applied at right angles to the first coat.
3.02 EVAPORATIVE RETARDANT
An evaporative retardant shall be used during concrete placement for water retaining
structure floor and roof slabs and other slabs larger than 2,500 square feet in size. The
retardant shall be sprayed using a power sprayer at a rate of 10 gallons per 2,000 square feet
after screeding and repeated after the first floating operation. The evaporative retardant shall
not be applied during the final steel troweling operations or after the water sheen has
disappeared from the concrete surface.
3.03 SLABS
For concrete surfaces not in contact with forms, a procedure determined by the ENGINEER
shall be applied immediately after completion of placement and finishing.
3.04 WALLS AND COLUMNS
Moisture loss from surfaces placed against wooden or metal forms exposed to heating by the
sun shall be minimized by keeping the forms wet until they can be safely removed. After
form removal, the concrete shall be cured until the end of the curing time by one of the
previously described curing methods. Concrete shall not be placed against forms that have
been exposed to air below freezing temperatures until the forms have been heated so that the
surface temperature of the form is >_ 40' F.
The top of walls and columns not covered by forms shall be cured using a membrane -curing
compound conforming to ASTM C 309 immediately after placement
3.05 OTHER SURFACES
Unless otherwise shown in the Drawings all other surfaces shall be cured using two
Bobcat Ridge Access Road 03390-3 Concrete Curing
Improvements
June 2006
B. Construction Progress Meetings: Progress meetings will be conducted weekly or at
some other frequency, if approved by the OWNER, ENGINEER and
CONTRACTOR. These meetings shall be attended by the OWNER, the
ENGINEER, the CONTRACTOR's representative and any others invited by these
people.
The meeting will be conducted by the ENGINEER and the ENGINEER will arrange
for keeping the minutes and distributing the minutes to all persons in attendance.
The agenda of these project meetings will include construction progress, the status of
submittal reviews, the status of information requests, critical work sequencing,
review of strategies for connections into existing facilities, status of field orders and
change orders, and any general business.
PART 2 PRODUCTS (Not Applicable)
PART 3 EXECUTION (Not Applicable)
END OF SECTION
Bobcat Ridge Access Road 01310-2 Project Meetings
Improvements
June 2006
applications of a membrane -curing compound conforming to ASTM C 309. The second
application shall be applied at 90' to the first application.
3.06 COLD WEATHER
Curing during cold weather conditions shall include the above methods except for water cure
unless measures are taken to prevent freezing of the water.
3.07 HOT WEATHER
If the rate of evaporation approaches 0.2 lb/ft2/hr, as estimated by ACI 305, precautions
against plastic shrinkage cracking are required. The CONTRACTOR shall have a recording
thermometer, hygrometer and wind gage on site seven days prior to first concrete placement.
When necessary, provision for windbreaks, shading, fog spraying, sprinkling, ponding, or wet
covering with a light colored material shall be made in advance of placement, and such
protective measures shall be taken as quickly as concrete hardening and finishing operations
will allow. Precautions against plastic shrinkage cracks may be required in conditions other
than what is normally considered hot weather conditions.
3.08 RATE OF TEMPERATURE CHANGE
Changes in temperature of the air immediately adjacent to the concrete during and
immediately following the curing period shall be kept as uniform as possible and shall not
exceed 5° F in any one hour or 50' F in any 24-hour period.
3.09 PROTECTION FROM MECHANICAL INJURY
During the curing period, the concrete shall be protected from damaging mechanical
disturbances, such as load stresses, heavy shock, and excessive vibration. All finished
concrete surfaces shall be protected from damage by construction equipment, materials, or
methods, by application of curing procedures, and by rain or running water. Self-supporting
structures shall not be loaded in such a way as to overstress the concrete.
END OF SECTION
Bobcat Ridge Access Road 03390-4 Concrete Curing
Improvements
June 2006
SECTION 03615
GROUT
PART1 GENERAL
1.01 SECTION INCLUDES
The Contractor shall furnish all labor, tools and equipment for the placement of grout in tie
holes and other locations as shown on the Drawings and specified herein.
This section includes basic mixing, application, and curing methods for grout.
Contractor shall have a printed set of manufacturer's recommendations for product use on
site for review during preparation, mixing and application of grouts.
1.02 RELATED SECTIONS
A. Section 03110 - Structural Cast -In -Place Concrete Forms
B. Section 03310 - Structural Concrete
C. Section 03320 - Construction Joints
D. Section 03350 - Concrete Finishing
E. Section 03900 - Concrete Curing
1.03 QUALITY STANDARDS
A. ASTM C 78 - Test Method for Flexural Strength of Concrete (Using Simple Beam
with Third -Point Loading
B. ASTM C 109 - Test Method for Compressive Strength of Hydraulic Cement Mortars
- Modified
C. ASTM C 469 - Test Method for Static Modulus of Elasticity and Poisson's Ratio of
Concrete in Compression
D. ASTM C 666 - Test Method for Resistance of Concrete to Rapid Freezing and
Thawing
E. ASTM C 882 - Test Method for Bond Strength of Epoxy Resin Systems used with
Concrete - Modified
F. ASTM C 1012 - Test Method for Length Change of Hydraulic Cement Mortars
Exposed to Sulfate Solution - Modified
G. ASTM C 1202 - Electrical Indication of Resistance to Chloride Ion Penetration
1.04 SUBMITTALS
A. Grout
Bobcat Ridge Access Road 03615-1 Grout
Improvements
June 2006
B. Bonding Agent
C. Curing Compound
1.05 QUALITY ASSURANCE
A. Field Tests
1. When the Owner is to perform grout testing, the Contractor shall assist the
Owner or his concrete testing consultant as requested during the
performance of quality control testing.
2. When prescribed in the Drawings or by these Specifications, length change
test specimens will be taken during construction from the first placement of
each type of mortar, and at intervals thereafter as selected by the Engineer to
insure continued compliance with these specifications. Unless otherwise
specified on the Drawings or Specifications the testing will be performed by
the Owner or testing representative.
3. When required length change tests and fabrication of specimens for cement
based mortar will be performed as specified in ASTM C 1012 at intervals
during construction as selected by the Engineer. A set of three specimens
will be made for testing at 7 and 28 days.
4. All mortar, already placed, that fails to meet the requirements of this
Specification, is subject to removal and replacement at the cost of the
Contractor.
5. Unless otherwise specified in the Drawings or Specifications, the cost of all
laboratory tests on grout will be bome by the Owner, but the Contractor
shall assist the Engineer in obtaining specimens for testing. However, the
Contractor shall be charged for the cost of any additional tests and
investigation on work performed which does not meet the Specifications.
B. Construction Tolerances
Construction tolerances shall be as specified in the Section 03110 except as modified
herein and elsewhere in the Contract Documents.
1.06 ACCEPTABLE MANUFACTURERS/PRODUCTS
Master Builders Technologies
EMACO R320 - Polymer -Modified Vertical/Overhead Patching Mortar
MB 429, Masterkure CR, Masterkure 200W or Masterkure 100W - curing
compounds
1.07 DELIVERY, STORAGE AND HANDLING
Cement based mortar shall be delivered and stored in manufacturer's packaging until it is
ready to be mixed and placed. Mortar bags shall be stored off the ground and protected from
water and all other substances that will penetrate packaging.
Bobcat Ridge Access Road 03615-2 Grout
Improvements
June 2006
PART PRODUCTS
2.01 MORTAR FOR TIE HOLES
EMACO R320 or approved equal.
2.02 BONDING ADHESIVES
Concresive Liquid LPL, Concresive Standard Liquid or approved equal.
2.03 WATER
Only clean potable water shall be used. A calibrated measuring device is required for
measuring the proper amount of water to be added to grouts and mortars.
2.04 CURING COMPOUND
MB 429, Masterkure 100W, Masterkure 200Wor approved equal.
2.05 (EXPOSED) REINFORCING STEEL COATING
EMACO P22 or approved equal.
PART 3 EXECUTION
3.01 GENERAL
These grouts contain admixtures that increase grout strength and workability. The strength
and performance of the grout is dependent on proper surface preparation, grout mixing and
curing. The Contractor shall be required to use a calibrated measuring device to add clean
potable water to the grout mix. Water added to a grout mix without a calibrated device is
cause for grout rejection, removal and re -placement.
Curing is critical to prevent shrinkage cracks that can develop with grouts containing some
admixtures. Curing shall begin immediately after placement.
All mixing, surface preparation, handling, placing, consolidation, and other means of
execution for pre -packaged mortars shall be done according to the instructions and
recommendations of the manufacturer and this Specification. In the event that a conflict
occurs between this Specification and manufacturer's instructions, the manufacturer's
instructions shall prevail in all cases.
3.02 GROUT FOR TIE HOLES
A. Preparation:
Thoroughly clean the roughened surface and any exposed reinforcement of rust, dirt,
loose chips, and dust. Maintain substrate in a saturated, surface -dry condition.
Where applicable, exposed reinforcing steel shall be coated with EMACO P22
reinforcing steel bar protection coating prior to patching.
Bobcat Ridge Access Road 03615-3 Grout
Improvements
June 2006
B. Mixing:
Comply with mortar manufacturer's recommendations for water quantity.
Mechanically mix with a slow speed drill (400 to 600 RPM) and Jiffler-type paddle.
Pour approximately 90% of the mix water into the mixing container; then add the
bagged material while continuing to mix. Add remaining water as needed. Mix time
shall not exceed 5 minutes.
C. Application:
Apply bonding adhesive such as Concresive Liquid LPL or Concresive Standard
Liquid.
Place and finish with trowel or screed. In hot, windy, or dry conditions, where rapid
surface evaporation may occur, use Confilm Evaporation Reducer.
D. Curing:
Apply Masterkure 200 W curing compound in accordance with label instructions.
END OF SECTION
Bobcat Ridge Access Road 03615-4
Improvements
June 2006
Grout
DIVISION 7 - THERMAL AND MOISTURE PROTECTION
SECTION 07900 SEALANTS
Bobcat Ridge Access Road
Improvements
June 2006
No Text
SECTION 07900
SEALANTS
PART1 GENERAL
1.01 SECTION INCLUDES
A. The CONTRACTOR shall furnish all labor, materials, tools, equipment, and perform
all work and services for all sealant work, both exterior and interior where the words
caulk, caulking or sealant is shown on Drawings or specified, in accordance with
provisions of the Contract Documents, and completely coordinated with work of all
other trades.
Although such work is not specifically indicated, furnish and install all
supplementary or miscellaneous items, appurtenances and devices incidental to or
necessary for a sound, secure and complete installation.
1.02 RELATED SECTIONS
A. Section 02770 — Sidewalk, Curb and Gutter, and Miscellaneous Concrete
B. Section 03310 — Structural Concrete
1.03 QUALITY STANDARDS
A. American Society for Testing and Materials (ASTM)
1. ASTM C 509 - Cellular Elastomeric Preformed Gasket and Sealing Material
2. ASTM C 920 - Elastomeric Joint Sealants
3. ASTM D 1056 - Flexible Cellular Materials - Sponge or Expanded Rubber
4. ASTM D 1565 - Flexible Cellular Materials - Vinyl Chloride Polymers and
Copolymers (Open -Cell Foam)
B. SWRI (Sealant, Waterproofing and Restoration Institute) - Sealant and Caulking
Guide Specification
C. Federal Specification (FS):
TT-S-011543A
2. TT-S-00227E(3)
3. 17-S-00230C, Type II, Class A
D. Acceptable Manufacturers:
Subject to compliance with specifications, products of the following manufacturers
are accepted for use:
Bobcat Ridge Access Road 07900-1 Sealants
Improvements
June 2006
1. Potable Water Containment Structures
Polyurethane sealant: Sika, Sikaflex 1-a or Sikaflex 1-c
2. Fire Resistant Sealant for Buildings
Fire resistant sealant: 3-6548 silicone RTV foam by General Electric
3. Portland Cement Concrete Pavements
a. Dow Corning 888 or 890.
b. Sika, Sikaflex - 15 LM
4. Portland Cement Concrete Curb, Gutter and Sidewalk
a. Sika, Sikaflex 1-a or Sikaflex - 1cSL
1.04 SUBMITTALS
A. The CONTRACTOR shall submit product specifications for all items pertaining to
the work covered in this section.
1.05 QUALITY ASSURANCE:
A. Perform work in accordance with SWRI requirements for materials and installation,
or;
B. Perform work in accordance with sealant manufacturer's requirements for
preparation of surfaces and material installation instructions.
C. Maintain one (1) copy of each document on site.
PART PRODUCTS
2.01 MATERIALS
A. Color: Provide colors matching materials being sealed. Where compound is not
exposed to view in finished work, provide manufacturer's color which has best
performance.
B. Type: Provide non -sagging sealant for vertical joints. Sealants for horizontal joints
may be self -leveling.
C. Filler Compatibility: Before use of any sealant, investigate its compatibility with
joint surfaces, fillers and other materials in joint system. Provide only materials
compatible with installation conditions.
D. Field Services: Obtain sealing compounds only from manufacturers who will, when
required, provide services of manufacturer's field service representatives at project
site for purposes of advising and instructing installers in proper procedures and
Bobcat Ridge Access Road 07900-2 Sealants
Improvements
June 2006
precautions for use of materials. Provide such services, when required, without
expense to OWNER.
E. Compressible Sealants: Size compressible sealant so that width of material is twice
joint width.
F. Sealant Applications:
1. One or two component polyurethane. (Exterior and interior use).
2. One or two component silicone. (Exterior use and interior wet area use.)
3. Compressible Sealant (where indicated).
4. Epoxy Sealants (where indicated).
5. Activated Oakum Sealants
a. Interior joints box culverts below elevation 5044.5.
1. Manufacture: Strata -Tech, Hydrotite ST-591, or equal.
2. Install materials per Manufacture's recommendations.
3. Once curing of the hydrophilic injection resin is complete,
no infiltration shall be observed through the joint.
6. Exterior Joint Collar
a. Exterior joints of box culverts below elevation 5044.5.
1. Manufacture: Mar -Mac Manufacturing Company, MacWrap
Exterior Joint Sealer; or equal.
2. Install materials per Manufacture's recommendations.
3. Band Width: 13"
G. Joint Cleaner: The joint shall be cleaned as recommended by sealant manufacturer.
H. Joint Primer -Sealer: The joint shall be cleaned as recommended as recommended by
sealant manufacturer.
I. Bond Breaker: Bond breaker material shall be furnished as recommended by sealant
manufacturer.
J. Sealant Backer Rod: Rod stock of polyethylene, polyethylene jacketed polyurethane
foam, or other flexible, non -absorbent, non -bituminous material recommended by
sealant manufacturer. The backer rod shall:
Control joint depth.
2. Break bond of sealant at bottom of joint.
3. Provide proper shape of sealant bead to minimize possibility of sealant
extrusion.
Bobcat Ridge Access Road 07900-3 Sealants
Improvements
June 2006
SECTION 01320
CONSTRUCTION SCHEDULES
PART1 GENERAL
1.01 SECTION INCLUDES
A. Prepare detailed schedule of all construction operations and procurements to be reviewed
by parties attending the preconstruction conference.
Schedule shall be approved by the OWNER and ENGINEER prior to Notice to Proceed.
1.02 FORMAT AND SUBMISSIONS
A. Prepare construction and procurement schedules in a graphic format suitable for
displaying scheduled and actual progress. The construction schedule shall clearly
identify the critical path for the project and shall also identify all critical procurement
items.
B. Submit four (4) copies of each schedule to the OWNER and -ENGINEER for review.
The ENGINEER will return one copy to the CONTRACTOR with revisions suggested or
necessary for coordination of the Work with the needs of the OWNER or others.
1.03 CONTENT
A. Construction Progress Schedule
Show the complete work sequence of construction by activity and location.
2. Show the dates for the beginning and completion of major task items. At a
minimum, show the following items:
• Removal of the existing upper and lower culverts
• Installation of both the upper and lower culverts
• Installation of the inverted siphon
• Construction of the gravel road
• The full closure of the road and the necessary use of the temporary access
road
• Construction of the stormwater overflow channel
3. Show projected percentage of completion for each item as of the first day of the
month.
B. Report of delivery of equipment and materials.
Show delivery status of critical and major items of equipment and materials.
Bobcat Ridge Access Road 01320-1 Construction Schedules
Improvements
June 2006
K. Compressible Sealant:
Foamed polyurethane strip saturated with polymerized polybutylene water
proofing.
2. Foamed polyurethane strip saturated with polymerized polybutylene
waterproofing coated on front face with non -reactive release agent that will
act as bond breaker for applied sealant.
L. Adhesive for Compressive Sealant: Apply adhesive as recommended by sealant
manufacturer.
PART 3 EXECUTION
3.01 INSTALLATION:
A. Surface Preparation: Clean all joint surfaces. Joint walls must be sound, clean, dry,
and free from oil, grease, and frost. Curing compound residues and any other
foreign matter must be thoroughly removed. Where required to completely clean the
joint, the joint shall be mechanically cleaned by water or sand blasting.
B. Bond Breaker or Backer Rod Installation: Install bond breaker or backer rod as
specified to regulate depth of sealant.
C. Areas to be Sealed: Seal building and any joints or areas which will permit
penetration of moisture unless sealing work is specifically required under other
Sections and/or as shown on the Drawings. Make all joints watertight.
D. Priming: Where required, prime joint surfaces. Limit application to surfaces to
receive caulking. Mask off adjacent surfaces.
E. Application: Use sufficient pressure to fill all voids and joints solid. Apply sealant
when joint slot is at the mid -point of its designed expansion and contraction. Install
sealant with hand or power -operated caulking gun horizontally in one direction and
vertically from top to bottom. Avoid overlapping of sealant to eliminate entrapment
of air.
To facilitate tooling, wet concave pointing tool with a diluted soap solution. Apply
sealants when the surface and ambient temperature is 40° F or higher and in
accordance with the temperature limitations of the manufacturer.
F. Compressible Joint Sealant: Install compressible sealant in joint to depth
recommended by manufacturer. Take care to avoid contamination of sides of joint.
Protect side walls of joint (to depth of sealant) as recommended by manufacturer.
Install with adhesive on two faces in contact with sides of joints.
G. Clean up: Dispose of all spillage and refuse sealant material in accordance with
applicable regulations.
END OF SECTION
Bobcat Ridge Access Road 07900-4 Sealants
Improvements
June 2006
DIVISION 9 - FINISHES
SECTION 09985 STRUCTURAL CONCRETE COATING
Bobcat Ridge Access Road
Improvements
June 2006
No Text
SECTION 09985
STRUCTURAL CONCRETE COATING
PART1 GENERAL
1.01 SECTION INCLUDES
A. This work shall consist of furnishing and applying two (2) coats of a semi -opaque
pure acrylic water repellent and colored coating to all exposed concrete surfaces in
accordance with the Drawings and these Specifications.
1. Structures to be coated include:
a. Headwalls and wingwalls on culverts No. 1 and 4.
1.02 RELATED SECTIONS
A. Section 03350 — Concrete Finishing
PART PRODUCTS
2.01 MATERIALS
A. The coating shall be self priming, semi -opaque colored toner containing only methyl
methacrylate ethyl acrylate copolymer resins. The toning pigments shall be
suspended in solution at all times by a chemical suspension agent and solvent. The
toning pigments shall be laminar silicates, titanium dioxide, and inorganic oxides.
There shall be no settling or color variation. Use of vegetable or marine oils, paraffin
materials, stearates, or organic pigments in any part of the coating formulation will
not be permitted.
Physical Properties:
Weight by Gallon 8.3 pounds, min.
Solids by Weight 30% min.
Sand (Silicone) 3.2 to 3.8 lbs./gallon (exclude at retaining walls
With form liner finish
PART 3 EXECUTION
3.01 CONSTRUCTION REQUIREMENTS
A. The coatings shall be applied to all exposed concrete elements above the ground line
and shall extend 1 foot below the ground line or as shown on the Drawings.
B. The color mixtures to be used shall be submitted in a color block for approval by the
OWNER.
C. Three (3) 2' x 2' samples showing the designated colors and texture shall be prepared
for initial approval. The coating shall be applied to a surface similar in pattern and
texture to the wall panels to be used on the project.
Bobcat Ridge Access Road 09985-1 Structural Concrete Coating
Improvements
June 2006
D. The coating shall be applied by the same methods to be used in the final field
application and in accordance with these Specifications. A final sample for the
chosen color and texture measuring at least 4' x 4' shall be prepared as specified
above and shall be set at the project site for a period of one (1) week for review by
the ENGINEER and his representative. The final samples must receive the
ENGINEER's written approval before the coating can be incorporated into the work.
E. All concrete finishing shall be completed in accordance with the Specifications.
Prior to application of the coating material, all voids and irregularities pointed and
trued with a mortar consisting of cement and fine sand aggregate. Only minor voids
which can be completely filled with the coating material may remain. Within 24
hours before the coating is applied, the concrete surfaces to be coated shall be hot
water blasted at a minimum of 3,000 psi followed by a cold water rinse to remove
dirt, curing agents, form release agents, or other foreign substances that would be
detrimental to the coating penetration or color. All surfaces to be coated must be
clean, dry, and free of frost or other foreign substances at the time of application.
The concrete shall be at least 14 days old before the bonding agent and coating may
be applied.
F. The coating shall be mixed by a mechanical mixer and must be applied by spraying.
A roller will be used immediately after the spray application to obtain texture, and fill
minor voids as approved by the ENGINEER. A brush may be used to apply coating
to form liner finishes as approved by the ENGINEER.
G. The process will be applied uniformly in the following sequences. Application of the
first coat applied at a rate of 45 square feet per gallon, and 80 square feet per gallon
for the second coat. The second coat shall not be applied until at least 12 hours after
application of the first coat, but not to exceed 96 hours, or as recommended by the
manufacturer. Workmanship shall be such that the final coated surface is colored
uniformly and presents a pleasing appearance.
H. The coating shall be applied only when the ambient temperature is between 40°F and
90°F.
END OF SECTION
Bobcat Ridge Access Road 09985-2 Structural Concrete Coating
Improvements
June 2006
K
2. Include a schedule which includes the critical path for Shop Drawings, tests, and
other submittal requirements for equipment and materials.
1.04 PROGRESS REVISIONS
A. Submit revised schedules and reports when changes are foreseen, when requested by
OWNER or ENGINEER, and with each application for progress payment.
B. Show changes occurring since previous submission.
1. Actual progress of each item to date.
2. Revised projections of progress and completion.
C. Provide a narrative report as needed to define:
1. Anticipated problems, recommended actions, and their effects on the schedule.
2. The effect of changes on schedules of others.
1.05 OWNER'S RESPONSIBILITY
A. OWNER's review is only for the purpose of checking conformity with the Contract
Documents and assisting CONTRACTOR in coordinating the Work with the needs of the
Project.
B. It is not to be construed as relieving CONTRACTOR from any responsibility to
determine the means, methods, techniques, sequences and procedures of construction as
provided in the General Conditions.
PART 2 PRODUCTS (Not Applicable)
PART 3 EXECUTION (Not Applicable)
END OF SECTION
Bobcat Ridge Access Road 01320-2 Construction Schedules
Improvements
June 2006
SECTION 01330
SUBMITTALS
PART1 GENERAL
1.01 SECTION INCLUDES
A. Requirements:
Where required by the Specifications, the CONTRACTOR shall submit
descriptive information that will enable the ENGINEER to determine
whether the CONTRACTOR's proposed materials, equipment, methods of
work are in general conformance to the design concept and in accordance
with the Drawings and Specifications. The information submitted may
consist of drawings, specifications, descriptive data, certificates, samples, test
results, product data, and such other information, all as specifically required
in the Specifications. In some instances, specified submittal information
describes some, but not all features of the material, equipment, or method of
work.
2. The CONTRACTOR shall be responsible for the accuracy and completeness
of the information contained in each submittal and shall assure that the
material, equipment, or method of work shall be as described in the
submittal. The CONTRACTOR shall verify that all features of all products
conform to the requirements of the Drawings and Specifications. The
CONTRACTOR shall ensure that there is no conflict with other submittals
and notify the ENGINEER in each case where its submittal may affect the
work of another CONTRACTOR or the OWNER. The CONTRACTOR
shall ensure coordination of submittals among the related crafts and
subcontractors.
3. Submittals will be reviewed for overall design intent and returned to
CONTRACTOR with action to be indicated by the ENGINEER. It shall be
the CONTRACTOR's responsibility to assure that previously accepted
documents are destroyed when they are superseded by a resubmittal as such.
4. It shall be the CONTRACTOR's responsibility to ensure that required items
are corrected and resubmitted. Any work done before approval shall be at
the CONTRACTOR's own risk.
B. Submittal Procedure:
Unless a different number is called for in the individual sections, six (6)
copies of each submittal and sample are required, four (4) of which will be
retained by the ENGINEER. The CONTRACTOR shall receive two (2)
copies in return. Faxed submittals will not be accepted.
2. Submittals that are related to or affect each other shall be forwarded
simultaneously as a package to facilitate coordinated review. Uncoordinated
submittals will be rejected.
Bobcat Ridge Access Road 01330-1 Submittals
Improvements
June 2006
3. If the items or system proposed are acceptable but the major part of the
individual drawings or documents are incomplete or require revision, the
submittal will be returned with requirements for completion.
4. The right is reserved for the ENGINEER to require submittals in addition to
those called for in individual sections.
5. Submittals regarding material and equipment shall be submitted directly to
the ENGINEER and will be accompanied by a transmittal form. A separate
form shall be used for each specific item, class of material, equipment, and
items specified in separate discrete sections for which the submittal is
required. Submittals for various items shall be made with a single form
when the items taken together constitute a manufacturer's package or are so
functionally related that expediency indicates checking or review of the
group or package as a whole.
6. A unique number, sequentially assigned, shall be noted on the transmittal
form accompanying each item submitted. Original submittal numbers shall
have the following format: "XXX-Y;" where "XXX" is the originally
assigned submittal number and "Y" is a sequential letter assigned for
resubmittals (i.e., A, B, or C being the first, second and third resubmittals,
respectively). Submittal 25B, for example, is the second resubmittal of
Submittal 25.
7. If the CONTRACTOR proposes to provide material, equipment, or method
of work that deviates from the Contract Documents, it shall indicate so under
"deviations" on the transmittal form accompanying the submittal copies.
8. Submittals that do not have all the information required to be submitted,
including deviations, are not acceptable and will be returned without review.
C. Review Procedure:
Submittals are specified for those features and characteristics of materials,
equipment, and methods of operation that can be selected based on the
CONTRACTOR's judgment of their conformance to the requirements of the
Drawing and Specifications. Other features and characteristics are specified
in a matter that enables the CONTRACTOR to determine acceptable options
without submittals. The review procedure is based on the CONTRACTOR's
guarantee that all features and characteristics not requiring submittals
conform to the Drawings and Specifications. Review shall not extend to
means, methods, techniques, sequences, or procedures of construction or to
verifying quantities, dimensions, weights or gages, or fabrication processes
(except where specifically indicated or required by the Specifications) of
separate items, and as such, will not indicate approval of the assembly in
which the item functions.
2. Unless otherwise specified, within twenty-one (21) calendar days after
receipt of the submittal, the ENGINEER will review the submittal and return
copies. The returned submittal will indicate one of the following actions:
Bobcat Ridge Access Road 01330-2 Submittals
Improvements
June 2006
a. If the review indicates that the material, equipment, or work method
complies with the Specifications, submittal copies will be marked
"NO EXCEPTIONS TAKEN". In this event, the CONTRACTOR
may begin to implement the work method or incorporate the material
or equipment covered by the submittal.
b. If the review indicates limited corrections are required, copies will be
marked "FURNISH AS NOTED". The CONTRACTOR may begin
implementing the work method or incorporating the material and
equipment covered by the submittal in accordance with the noted
corrections. Where submittal information will be incorporated in
Operation and Maintenance data, a corrected copy shall be provided.
C. If the review indicates that the submittal is insufficient or contains
incorrect data, copies will be marked "REVISE AND RESUBMIT".
Except at its own risk, the CONTRACTOR shall not undertake work
covered by this submittal until it has been revised, resubmitted and
returned marked either "NO EXCEPTIONS TAKEN" or "FURNISH
AS NOTED".
d. If the review indicates that the material, equipment, or work method
do not comply with the Specifications, copies of the submittal will be
marked "REJECTED". Submittals with deviations that have not
been identified clearly may be rejected. Except at its own risk, the
CONTRACTOR shall not undertake the work covered by such
submittals until a new submittal is made and returned marked either
"NO EXCEPTIONS TAKEN" or "FURNISH AS NOTED".
D. Drawing:
The term "shop drawings" includes drawings, diagrams, layouts, schematic,
descriptive literature, illustrations schedules performance and test data, and
similar materials furnished by CONTRACTOR to explain in detail specific
portions of the work required by the Contract
2. CONTRACTOR shall coordinate all such drawings, and review them for
legibility, accuracy, completeness and compliance with contract requirements
and shall indicate this approval thereon as evidence of such coordination and
review. Shop drawing submitted to the ENGINEER without evidence of
CONTRACTOR's approval will be returned for resubmission.
3. Shop drawing shall be clearly identified with the name and project number of
this contract, and references to applicable specification paragraphs and
contract drawings. When catalog pages are submitted, applicable items shall
be clearly identified.
4. CONTRACTOR shall stamp his approval on shop drawings prior to
submission to the ENGINEER as indication of his checking and verification
of dimensions and coordination with interrelated items. Stamp shall read:
"(CONTRACTOR's Name) represents that we have determined and verified
all field dimensions and measurements, field construction criteria, materials,
Bobcat Ridge Access Road 01330-3 Submittals
Improvements
June 2006
catalog numbers and similar data, and that we have checked with the
requirements of the Specifications and Drawings, the Contract Documents,
and General Conditions".
Marks on drawings by CONTRACTOR shall not be in red. Any marks by
CONTRACTOR shall be duplicated on all copies submitted.
5. If shop drawings show variations from contract requirements,
CONTRACTOR shall describe such variations in writing, separate from the
drawings, at time of submission. All such variations must be approved by
the ENGINEER If ENGINEER approves any such variations, he shall
issue an appropriate contract modification, except that, if the variation is
minor and does not involve a change in price or in time of performance, a
modification need not be issued.
6. Should the CONTRACTOR propose any item on his shop drawings or
incorporate an item into the work, and that item should subsequently prove to
be defective or otherwise unsatisfactory, (regardless of the ENGINEER's
preliminary review), the CONTRACTOR shall, at his own expense, replace
the item with another item that will perform satisfactorily.
E. Certificates:
For those items called for in individual sections, famish six (6) certificates of
compliance from manufacturers or suppliers certifying that materials or equipment
being furnished under the Contract comply with the requirements of these
Specifications.
F. Samples:
Samples shall be sufficient in size to clearly illustrate functional characteristics and
full range of color, texture, and pattern.
G. Effect of Review of CONTRACTOR's Submittals:
Review of drawings, data, methods of work, or information regarding materials or
equipment the CONTRACTOR proposes to provide, shall not relieve the contractor
of its responsibility for errors therein and shall not be regarded as an assumption of
risks or liability by the ENGINEER or the OWNER, or by any officer or employee
thereof, and the CONTRACTOR shall have no claim under the Contract on account
of the failure or partial failure, of the method of work, material, or equipment so
reviewed. A mark of "NO EXCEPTIONS TAKEN" or "FURNISH AS NOTED"
shall mean that the OWNER has no objection to the CONTRACTOR, upon its own
responsibility, using the plan or method of work proposed, or providing the materials
or equipment proposed.
Bobcat Ridge Access Road 01330-4 Submittals
Improvements
June 2006
PART 2 PRODUCTS (Not Applicable)
PART 3 EXECUTION (Not Applicable)
END OF SECTION
Bobcat Ridge Access Road 01330-5 Submittals
Improvements
June 2006
THIS PAGE INTENTIONALLY LEFT BLANK
Bobcat Ridge Access Road 01330-6 Submittals
Improvements
June 2006
SECTION 01425
STANDARD REFERS.
PART1 GENERAL
1.01 SECTION INCLUDES
A. Reference to standards, specifications, manuals, or codes of any technical society,
organization, or association, or to the laws or regulations of any governmental
authority, whether such reference be specific or by implication, shall mean the latest
standard specification, manual, code, or laws or regulations in effect at the time of
opening of Bids, except as may be otherwise specifically stated. However, no
provision of any referenced standard, specifications manual or code (whether or not
specially incorporated by reference in the Contact Documents) shall be effective to
change the duties and responsibilities of OWNER, CONTRACTOR, or ENGINEER,
or any of their consultants, agents or employees from those set forth in the Contract
Documents, nor shall it be effective to assign to ENGINEER, or any of
ENGINEER's Consultants, agents, or employees, any duty or authority to supervise
or direct the furnishing or performance of the Work.
Whenever used in the Contract Documents, the following abbreviations will have the
meanings listed:
AASHTO American Association of State Highway and Transportation
Officials
444 North Capital Street, N.W., Suite 225
Washington, DC 20001
ACI
American Concrete Institute
P. O. Box 19150
Detroit, MI
ACPA
American Concrete Pipe Association
AISC
American Iron and Steel Institute
150 East 42nd Street
New York, NY 10017
AISI
American Iron and Steel Institute
150 East 42nd Street
New York, NY 10017
ANSI
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10017
AREMA American Railway Engineering
and Maintenance -of -Way Association
8201 Corporate Drive, Suite 1125
Landover, MD 20785
Bobcat Ridge Access Road 01425-1 Standard References
Improvements
June 2006
ASCE American Society of Civil Engineers
345 East 47th Street
New York, NY 10017
ASTM American Society of Testing and Materials
1916 Race Street
Philadelphia, PA 19103
BOCA Building Officials and Code Administrators
17926 Halstead
Homewood, IL 60430
CISPI Cast Iron Soil Pipe Institute
CRSI Concrete Reinforcing Steel Institute
180 North LaSalle Street
Chicago, IL 60601
CSI Construction Specifications Institute
DIPRA Ductile Iron Pipe Research Associations
EPA Environmental Protection Agency
FEDSPEC Federal Specifications
General Services Administration
Specification and Consumer Information
Distribution Branch
Washington Navy Yard, Building 197
Washington, DC 20407
FEDSTDS Federal Standards (see FEDSPEC)
ICBO International Conference of Building Officials
5360 South Workman Mill Road
Whittier, CA 90601
MILSPEC Military Specifications
Naval Publications and Forms Center
5801 Tabor Avenue
Philadelphia, PA 19120
NIST
NPC
NSC
National Institute of Standards and Technology
National Plumbing Code
National Safety Council
Bobcat Ridge Access Road 01425-2 Standard References
Improvements
June 2006
OSHA Occupational Safety and Health Act
U.S. Department of Labor
Occupational and Health Administration
San Francisco Regional Office
450 Golden Gate Avenue, Box 30617
PCA Portland Cement Association
PCI Prestressed Concrete Institute
PS Products Standards Section - U.S. Depart. of Commerce
SSPC Steel Structures Painting Council
SSPWC Standard Specifications for Public Works Construction
Building News, Inc.
3055 Overhead Avenue
Los Angeles, CA 90034
TCA Title Council of America
UBC Uniform Building Code
Published by ICBO
UL Underwriter's Laboratory
207 East Ohio Street
Chicago, IL 60611
UMC Uniform Mechanical Code
Published by ICBO
UPC Uniform Plumbing Code
Published by IAPMO
PART 2 PRODUCTS (Not Applicable)
PART 3 EXECUTION (Not Applicable)
END OF SECTION
Bobcat Ridge Access Road 01425-3 Standard References
Improvements
June 2006
TABLE OF CONTENTS
SECTION
DIVISION 1 - GENERAL REQUIREMENTS
01110
SUMMARY OF WORK
01140
CONTRACTOR'S USE OF PREMISES
01145
SPECIAL PROJECT PROCEDURES
01180
UTILITY SOURCES
01310
PROJECT MEETINGS
01320
CONSTRUCTION SCHEDULES
01330
SUBMITTALS
01425
STANDARD REFRENCES
01450
MATERIALS TESTING
01555
TRAFFIC REGULATION
01635
SUBSTITUTIONS AND PRODUCT OPTIONS
01650
MATERIAL DELIVERY, STORAGE, AND HANDLING
01710
SITE CONDITIONS
01715
TREE, LANDSCAPE, VEGETATION, AND WETLAND PROTECTION
01720
FIELD ENGINEERING AND SURVEYING
01745
ENVIRONMENTAL CONTROLS
01780
CONTRACT CLOSEOUT
DIVISION 2 - SITE WORK
02220
REMOVAL OF STRUCTURES AND OBSTRUCTIONS
02230
CLEARING AND GRUBBING
02235
TOPSOIL
02240
WATER CONTROL AND DEWATERING
02315
EXCAVATION AND EMBANKMENT
02320
TRENCH EXCAVATION AND BACKFILL
02321
CONTROLLED LOW STRENGTH MATERIAL BACKFILL
(FLO-FILL)
02370
EROSION AND SEDIMENT CONTROL
02375
RIPRAP
02613
PRE -CAST REINFORCED CONCRETE BOX CULVERT
02615
DUCTILE IRON PIPE
02620
LOW PRESSURE PLASTIC PIPE
02710
AGGREGATE BASE COURSE
02740
FLEXIBLE PAVEMENT
02920
LAWNS AND GRASSES
DIVISION 3 - CONCRETE
03110
STRUCTURAL CAST -IN -PLACE CONCRETE FORMS
03210
REINFORCING STEEL
03310
STRUCTURAL CONCRETE
03320
CONSTRUCTION JOINTS
Bobcat Ridge Access Road (i)
Improvements
June 2006
THIS PAGE INTENTIONALLY LEFT BLANK.
Bobcat Ridge Access Road 01425-4 Standard References
Improvements
June 2006
SECTION 01450
MATERIALS TESTING
PART1 GENERAL
1.01 SECTION INCLUDES
A. Provide such equipment and facilities as are required for conducting field tests and
for collecting and forwarding samples. Do not use any materials or equipment
represented by samples until tests, if required, have been made and the materials or
equipment found to be acceptable. Any product which becomes unfit for use after
approval thereof shall not be incorporated into the work.
B. Tests shall be made by an accredited testing laboratory selected by the OWNER.
Except as otherwise provided, sampling and testing of all materials and the laboratory
methods and testing equipment shall be in accordance with the latest standards and
tentative methods of the American Society for Testing Materials (ASTM), and the
American Association of Highway and Transportation Officials (AASHTO).
C. Where additional or specific information concerning testing methods, sample sizes,
etc., is required, such information is included under the applicable sections of the
Specifications. Any modification of, or elaboration on, these test procedures which
may be included for specific materials under their respective sections in the
Specifications shall take precedence over these procedures.
1.02 OWNER'S RESPONSIBILITIES
A. The OWNER shall be responsible for and shall pay all costs in connection with the
following testing:
Soils compaction tests.
2. Trench backfill.
3. Pipe and structural bedding.
4. Tests not called for by the Specifications of materials delivered to the site.
5. Concrete tests.
6. Pavement tests
1.03 CONTRACTOR'S RESPONSIBILITIES
A. In addition to those inspections and tests called for in the General Conditions,
CONTRACTOR shall also be responsible for and shall pay all costs in connection
with testing required for the following:
1. Testing of concrete manholes.
Bobcat Ridge Access Road 01450-1 Materials Testing
Improvements
June 2006
2. Concrete materials and mix designs.
3. Design of asphalt mixtures.
4. Gradation tests for embedment, fill and backfill materials.
5. All performance and field testing specifically called for by the Specifications.
6. All retesting for work or materials found defective or unsatisfactory,
including tests covered under 1.02 above.
7. Water quality testing required by discharge permits.
1.04 TRANSMITTAL OF TEST REPORTS
Written reports of tests and engineering data furnished by CONTRACTOR for ENGINEER's
review of materials and equipment proposed to be used in the work shall be submitted as
specified for Shop Drawings.
The testing laboratory retained by the OWNER will furnish three (3) copies of a written
report of each test performed by laboratory personnel in the field or laboratory. Two (2)
copies of each test report will be transmitted to the ENGINEER and one (1) copy to the
CONTRACTOR within seven (7) days after each test is completed.
PART 2 PRODUCTS (Not Applicable)
PART 3 EXECUTION (Not Applicable)
END OF SECTION
Bobcat Ridge Access Road 01450-2 Materials Testing
Improvements
June 2006
SECTION 01555
TRAFFIC REGULATION
PART1 GENERAL
1.01 SECTION INCLUDES
A. Conformance: Larimer County Traffic Control Regulations, Manual of Uniform Traffic
Control Devices (U.S. Department of Transportation), or applicable statutory requirements
of authority having jurisdiction. Larimer County Traffic Control Regulations takes
precedence over Manual of Uniform Traffic Control Devices.
B. Operations on or about traffic areas and provisions for regulating traffic will be subject to
the regulation of governmental agencies having jurisdiction over the affected areas.
C. Keep traffic areas free of excavated material, construction equipment, pipe, and other
materials and equipment.
D. Keep fire hydrants and water control valves free from obstruction and available for use at all
times.
E. Conduct operations in a manner to avoid unnecessary interference with public and private
roads and drives.
1.02 TRAFFIC CONTROL PLAN
A. The Traffic Control Plan is to be used as a guideline for the CONTRACTOR. Adjustments
to the approved plan may be required by the OWNER based on actual traffic operation.
B. Traffic control shall be provided by the CONTRACTOR.
1.03 FLAGMEN
A. Required where necessary to provide for public safety, or the regulation of traffic, or by
jurisdictional authorities.
B. Shall be properly equipped and certified by ATSSA.
1.04 WARNING SIGNS AND LIGHTS
A. Provide barricades and warning signs for:
1. Open trenches and other excavations.
2. Obstructions, such as material piles, equipment (moving or parked), piled
embankment.
B. Illuminate by means of warning lights all barricades and obstructions from sunset to
sunrise.
C. Protect roads and driveways by effective barricades on which are placed acceptable
warning signs.
D. Barricades and warning signs must be acceptable to the ENGINEER.
Bobcat Ridge Access Road 01555-1 Traffic Regulation
Improvements
June 2006
1.05 PARKING
A. The CONTRACTOR shall designate parking areas with the approval of the OWNER for
the use of all construction workers and others performing work or furnishing services in
connection with the project so as avoid interference with public traffic, OWNER's
operations, or construction activities.
1.06 ROADWAY USAGE BETWEEN OPERATIONS
A. At all times when work is not actually in progress, CONTRACTOR shall make passable
and shall open to traffic such portions of the project and temporary roadways or portions
thereof as may be agreed upon between CONTRACTOR and OWNER and all authorities
having jurisdiction over any properties involved.
1.07 WORK AREA SAFETY
A. The CONTRACTOR shall maintain a safe work area and protect area residents,
motorists, bicyclists, pedestrians, and children from work area hazards.
B. The CONTRACTOR shall provide all work area safety control devices, such as
barricades and safety fence around all excavations and drop-offs.
C. Work area safety control devices will not be paid for separately. Cost for this equipment
should be included in the unit costs for the work items which will require work area
safety control devices.
PART 2 PRODUCTS (Not Applicable)
PART 3 EXECUTION (Not Applicable)
END OF SECTION
Bobcat Ridge Access Road 01555-2 Traffic Regulation
Improvements
June 2006
SECTION 01635
SUBSTITUTIONS AND PRODUCT OPTIONS
PART1 GENERAL
1.01 SECTION INCLUDES
A. Description:
This section describes the procedure required by the CONTRACTOR for
product substitutions.
2. Requests for Substitution:
a. Base all bids on materials, equipment and procedures specified.
b. Certain types of equipment and kinds of material are described in
specifications by means of trade names and catalog numbers, and/or
manufacturer's names. Where this occurs, it is not intended to
exclude from consideration such types of equipment and kinds of
material bearing other trade names, catalog numbers and/or
manufacturer's names, capable of accomplishing purpose of types of
equipment or kinds of material specifically indicated.
C. Other types of equipment and kinds of material may be acceptable to
the OWNER and ENGINEER.
d. Types of equipment, kinds of material and methods of construction,
if not specifically indicated must be approved in writing by
ENGINEER and the OWNER.
3. Submission of Requests for Substitution:
a. After Notice to Proceed, the OWNER/ENGINEER will consider
written requests for substitutions of products, materials, systems or
other items.
b. The ENGINEER reserves the right to require substitute items to
comply color and pattern -wise with base specified items, if necessary
to secure "design intent".
C. Submit six (6) copies of request for substitution. Include in request:
1) Complete data substantiating compliance of proposed
substitute with Contract Documents.
2) For products:
i. Product identification, including manufacturer's
name.
Bobcat Ridge Access Road 01635-1 Substitutions and
Improvements Product Options
June 2006
ii. Manufacturer's literature, marked to indicate
specific model, type, size, and options to be
considered: Product description; performance and
test data; reference standards; difference in power
demand; dimensional differences for specified unit.
Name and address of similar projects on which
product was used, date of installation, and field
performance data.
3) For construction methods:
i. Detailed description of proposed method.
ii. Drawings illustrating methods.
4) Itemized comparison of proposed substitution with product
or method specified.
5) Data relating to changes in construction schedule.
6) Relation to separate contracts.
7) Accurate cost data on proposed substitution in comparison
with product or method specified.
d. In making request for substitution, or in using an approved substitute
item, Supplier/Manufacturer represents:
1) He has personally investigated proposed product or method,
and has determined that it is equal or superior in all respects
to that specified and that it will perform function for which it
is intended.
2) He will provide same guarantee for substitute item as for
product or method specified.
3) He will coordinate installation of accepted substitution into
work, to include building modifications if necessary, making
such changes as may be required for work to be complete in
all aspects.
4) He waives all claims for additional costs related to
substitution which subsequently become apparent.
4. Substitutions:
a. Request sufficiently in advance to avoid delay in construction.
Bobcat Ridge Access Road 01635-2 Substitutions and
Improvements Product Options
June 2006
5. CONTRACTOR's Option:
a. For products specified only by reference standards, select any
product meeting standards by any manufacturer, indicate selected
type in submission.
b. For products specified by naming several products or manufacturers,
select any product and manufacturer named, indicate selected type in
submission.
C. For products specified by naming one or more products, but
indicating option of selecting equivalent products by stating "or
equivalent" after specified product, CONTRACTOR must submit
request, as required for substitution, for any product not specifically
named.
6. Rejection of Substitution or Optional Item:
a. Substitutions and/or options will not be considered if-
1) They are indicated or implied on shop drawings, or project
data submittals, without formal request submitted in
accordance with this section.
PART 2 PRODUCTS (Not Applicable)
PART 3 EXECUTION (Not Applicable)
END OF SECTION
Bobcat Ridge Access Road 01635-3 Substitutions and
Improvements Product Options
June 2006
THIS PAGE INTENTIONALLY LEFT BLANK.
Bobcat Ridge Access Road 01635-4 Substitutions and
Improvements Product Options
June 2006
SECTION 01650
MATERIAL DELIVERY, STORAGE,
AND HANDLING
PART1 GENERAL
1.01 SECTION INCLUDES
A. Equipment, products and materials shall be shipped, handled, stored, and installed in
ways which will prevent damage to the items. Damaged items will not be permitted
as part of the work except in cases of minor damage that have been satisfactorily
repaired and are acceptable to the ENGINEER.
PART 2 PRODUCTS (Not Applicable)
PART 3 EXECUTION (Not Applicable)
END OF SECTION
Bobcat Ridge Access Road 01650-1 Material Delivery,
Improvements Storage, and Handling
June 2006
03350 CONCRETE FINISHING
03390 CONCRETE CURING
03615 GROUT
DIVISION 7 — THERMAL AND MOISTURE PROTECTION
07900 SEALANTS
DIVISION 9 — FINISHES
09985 STRUCTURAL CONCRETE COATING
APPENDIX A
• CTL THOMPSON INCORPORATION, SOILS AND FOUNDATION
INVESTIGATION BOBCAT RIDGE AND COUNTY ROAD 32C IMPROVEMENTS,
LARIMER COUNTY, COLORADO
Bobcat Ridge Access Road (ii)
Improvements
June 2006
THIS PAGE INTENTIONALLY LEFT BLANK
Bobcat Ridge Access Road 01650-2 Material Delivery,
Improvements Storage, and Handling
June 2006
SECTION 01710
SITE CONDITIONS
PART1 GENERAL
1.01 SECTION INCLUDES
A. General:
1. The CONTRACTOR acknowledges that he has satisfied himself as to the nature
and location of the work, the general and local conditions, particularly those
bearing upon access to the site; handling, storage, and disposal of materials;
availability of water, electricity and roads; uncertainties of weather, river stages,
water flow rates and levels in irrigation ditches and canals or similar physical
conditions at the site; the conformation and conditions of the ground; the
equipment and facilities needed preliminary to and during the execution of the
work; and all other matters which can in any way affect the work or the cost
thereof under this Contract.
2. The CONTRACTOR further acknowledges that he has satisfied himself as to the
character, quality and quantity of surface and subsurface materials to be
encountered from his inspection of the site and from reviewing any available
records of exploratory work furnished by the OWNER or included in these
Documents. Failure by the CONTRACTOR to acquaint himself with the
physical conditions of the site and all the available information will not relieve
him from responsibility for properly estimating the difficulty or cost of
successfully performing the work.
3. The CONTRACTOR warrants that as a result of his examination and
investigation of all the aforesaid data that he can perform the work in a good and
workmanlike manner and to the satisfaction of the OWNER. The OWNER
assumes no responsibility for any representations made by any of its officers or
agents during or prior to the execution of this Contract, unless (1) such
representations are expressly stated in the Contract, and (2) the Contract
expressly provides that the responsibility therefore is assumed by the OWNER.
PART PRODUCTS
2.01 INFORMATION ON SITE CONDITIONS
A. Any information obtained by the ENGINEER regarding site conditions, subsurface
information, groundwater elevations, existing construction of site facilities, and similar
data will be available for inspection, as applicable, at the office of the ENGINEER upon
request. Such information is offered as supplementary information only. Neither the
ENGINEER nor the OWNER assumes any responsibility for the completeness or
interpretation of such supplementary information.
Differing Subsurface Conditions:
a. In the event that the subsurface or latent physical conditions are found
materially different from those indicated in these Documents, and
differing materially from those ordinarily encountered and generally
recognized as inherent in the character of work covered in these
Contract Documents, the CONTRACTOR shall promptly, and before
Bobcat Ridge Access Road 01710-1 Site Conditions
Improvements
June 2006
such conditions are disturbed, notify the ENGINEER in writing of such
changed conditions.
b. The ENGINEER will investigate such conditions promptly and
following this investigation, the CONTRACTOR shall proceed with the
work, unless otherwise instructed by the ENGINEER. If the
ENGINEER finds that such conditions do so materially differ and cause
an increase or decrease in the cost of or in the time required for
performing the work, the ENGINEER will recommend to the OWNER
the amount of adjustment in cost and time he considers reasonable. The
OWNER will make the final decision on all Change Orders to the
Contract regarding any adjustment in cost or time for completion.
2. Underground Utilities:
a. Known utilities and structures adjacent to or encountered in the work
are shown on the Drawings. The locations shown are taken from
existing records and the best information available from existing utility
plans, however, it is expected that there may be some discrepancies and
omissions in the locations and quantities of utilities and structures
shown. Those shown are for the convenience of the CONTRACTOR
only, and no responsibility is assumed by either the OWNER or the
ENGINEER for their accuracy or completeness.
PART 3 EXECUTION
3.01 GENERAL
A. Where the CONTRACTOR's operations could cause damage or inconvenience to
railway, telegraph, telephone, television, oil, gas, electricity, water, sewer, or irrigation
systems, the operations shall be suspended until all arrangements necessary for the
protection of these utilities and services have been made by the CONTRACTOR.
B. Notify all utility offices which are affected by the construction operation at least 48 hours
in advance. Under no circumstances expose any utility without fast obtaining permission
from the appropriate agency. Once permission has been granted, locate, expose, and
provide temporary support for all existing underground utilities.
C. The CONTRACTOR shall protect all utility poles from damage. If interfering power
poles, telephone poles, guy wires, or anchors are encountered, notify the ENGINEER and
the appropriate utility company at least 48 hours in advance of construction operations to
permit the necessary arrangements for protection or relocation of the interfering structure.
D. The CONTRACTOR shall be solely and directly responsible to the owner and operators
of such properties for any damage, injury, expense, loss, inconvenience, delay, suits,
actions, or claims of any character brought because of any injuries or damage which may
result from the construction operations under this Contract.
E. Neither the OWNER nor its officers or agents shall be responsible to the
CONTRACTOR for damages as a result of the CONTRACTOR's failure to protect
utilities encountered in the work.
F. If the CONTRACTOR while performing the Contract discovers utility facilities not
identified in the Drawings or Specifications, he shall immediately notify the OWNER,
Bobcat Ridge Access Road 01710-2 Site Conditions
Improvements
June 2006
utility, and the ENGINEER in writing.
G. hi the event of interruption to domestic water, sewer, storm drain, or other utility services
as a result of accidental breakage due to construction operations, promptly notify the
proper authority. Cooperate with said authority in the restoration of service as promptly
as possible and bear all costs of repair.
H. The CONTRACTOR shall replace, at his own expense, any and all other existing utilities
or structures removed or damaged during construction, unless otherwise provided for in
these Contract Documents or ordered by the ENGINEER.
3.02 INTERFERING STRUCTURES
A. The CONTRACTOR shall take necessary precautions to prevent damage to existing
structures whether on the surface, aboveground, or underground. An attempt has been
made to show major structures on the Drawings. The completeness and accuracy cannot
be guaranteed, and it is presented simply as a guide to avoid known possible difficulties.
3.03 FIELD RELOCATION
A. During the progress of construction, it is expected that minor relocations of the work will
be necessary. Such relocations shall be made only by direction of the ENGINEER. If
existing structures are encountered that prevent the construction, and that are not properly
shown on the Drawings, notify the ENGINEER before continuing with the construction
in order that the ENGINEER may make such field revision as necessary to avoid conflict
with the existing structures. If the CONTRACTOR shall fail to so notify the
ENGINEER when an existing structure is encountered, and shall proceed with the
construction despite the interference, he shall do so at his own risk.
3.04 EASEMENTS
A. Where portions of the work are located on public or private property, easements and
permits will be obtained by the OWNER. Easements will provide for the use of the
property for construction purposes to the extent indicated on the easements. Copies of
these easements and permits are available upon request to the OWNER. It shall be the
CONTRACTOR's responsibility to determine the adequacy of the easement obtained in
every case and to abide by all requirements and provisions of the easement. The
CONTRACTOR shall confine his construction operations to within the easement limits
or make special arrangements with the property owners or appropriate public agency for
the additional area required. Any damage to property, either inside or outside the limits
of the easements provided by the OWNER, shall be the responsibility of the
CONTRACTOR as specified herein. The CONTRACTOR shall remove, protect, and
replace all fences or other items encountered on public or private property. Before final
payment will be authorized by the ENGINEER, the CONTRACTOR will be required to
furnish the OWNER with written releases from property owners or public agencies where
side agreements or special easements have been made by the CONTRACTOR or where
the CONTRACTOR's operations, for any reason, have not been kept within the
construction right-of-way obtained by the OWNER.
B. It is anticipated that the required easements and permits will be obtained before
construction is started. However, should the procurement of any easement or permit be
delayed, the CONTRACTOR shall schedule and perform the work around these areas
until such a time as the easement or permit has been secured.
Bobcat Ridge Access Road 01710-3 Site Conditions
Improvements
June 2006
3.05 LAND MONUMENTS
A. The CONTRACTOR shall notify the ENGINEER of any existing Federal, State, City,
County, and private land monuments encountered. Private monuments shall be
preserved, or replaced by a licensed surveyor at the CONTRACTOR's expense. When
Government monuments are encountered, the CONTRACTOR shall notify the
ENGINEER at least two (2) weeks in advance of the proposed construction in order that
the ENGINEER will have ample opportunity to notify the proper authority and reference
these monuments for later replacement.
END OF SECTION
Bobcat Ridge Access Road 01710-4 Site Conditions
Improvements
June 2006
SECTION 01715
TREE, LANDSCAPE, VEGETATION, AND WETLAND PROTECTION
PART1 GENERAL
1.01 SECTION INCLUDES
A. The work for this section consists of protecting existing trees, landscape, wetlands and
adjacent vegetation. The CONTRACTOR must take special care to avoid damaging
existing trees and vegetation in areas that do not need to be disturbed to complete
construction.
PART 2 PRODUCTS (Not Applicable)
PART 3 EXECUTION
3.01 SUBMITTAL REQUIREMENTS
A. The CONTRACTOR shall submit a plan for on -site haul of materials prior to
construction. The plans shall include points of access to and from the site and shall show
a workable system of on -site haul routes that protect existing landscaped and wetland
areas. This plan shall be submitted to the ENGINEER for his review and comment prior
to the commencement of any work. The plan will be discussed with the CONTRACTOR
to insure protection of existing vegetation, but the ENGINEER shall not dictate haul
routes or construction methods to the CONTRACTOR. Note that the Natural Resources
Department may dictate haul routes within the city designated Natural area.
3.02 CONSTRUCTION REQUIREMENTS
A. Protected areas will be marked in the field, one time, by the OWNER and ENGINEER.
No access of construction vehicles or workers on foot is permitted through protected
areas. No material shall be stockpiled; no equipment shall be parked or repaired within
these areas.
B. Trees and vegetation to be saved that do not fall within the limits of protected areas shall
be marked one time in the field by the OWNER and ENGINEER. The CONTRACTOR
shall erect fencing if there is risk of damage caused by construction operations.
Vehicular and pedestrian traffic shall be limited to performing work in areas marked.
Through traffic, and stock piling of equipment and materials are not permitted within
marked areas.
C. No construction roads are to be created within the drop lines of any trees or other
vegetation designated to be saved without approval of the ENGINEER.
D. All trees which will be preserved, but are within the limits of construction, must be
protected from all damage associated with construction. A sturdy, physical barrier
(florescent orange in color) must be fixed in place around each tree for the duration of
construction. This barrier will be placed no closer than 6. feet from the trunk, or the drip
line, whichever is greater. The barrier itself must be fixed so it cannot be moved easily,
but the material can be flexible, such as orange snow fence attached to T-posts driven
into the ground, and must act as an effective deterrent to deliberate or accidental damage
of each tree. Actual materials and location of barrier must be approved by the OWNER's
representatives (i.e. Utilities and City Forester) and ENGINEER.
Bobcat Ridge Access Road 01715-1 Tree, Landscape, Vegetation,
Improvements and Wetland Protection
June 2006
E. The movement or storage of equipment, material, debris, or fill within these required
protective barriers is completely prohibited.
F. Any trees damaged during construction shall be immediately repaired by an approved
tree surgeon. Any tree judged by the ENGINEER to be damaged beyond repair shall be
removed at the CONTRACTOR's expense. For each tree erroneously removed or
damaged beyond repair, an assessment shall be immediately withheld from the
CONTRACTOR's progress payments. This assessment shall be equal to the value of the
tree prior to damage. This assessment shall be determined by a tree appraiser, selected by
the OWNER and paid for by the CONTRACTOR. The cost for hiring the appraiser shall
also be withheld from the CONTRACTOR's progress payments.
In addition to the paying of the assessment, the CONTRACTOR shall replace each
damaged tree per OWNER'S standards for tree mitigation.
G. The CONTRACTOR shall pay an assessment if he disturbs any grasses, shrubs and/or
cattails located within the protected areas. The assessment shall not exceed one dollar
($1.00) per square foot of disturbance, and will be immediately withheld from the
CONTRACTOR's progress payments.
In addition to the paying of the assessment, the damaged vegetation shall be replaced
with an equal value per square foot of damage. Replacements shall be planted in
accordance with the provisions outlined in these Specifications. Damaged wetland areas
shall be replaced and then seeded with a wetland seed mix in accordance with these
Specifications or as directed by the ENGINEER.
END OF SECTION
Bobcat Ridge Access Road 01715-2 Tree, Landscape, Vegetation,
Improvements and Wetland Protection
June 2006
SECTION 01720
FIELD ENGINEERING AND SURVEYING
PART GENERAL
1.01 SECTION INCLUDES
A. Surveying:
The OWNER will provide construction surveying for the project. City
Survey Crews will perform the surveying required.
2. The CONTRACTOR must submit a survey request form to the City
Surveyors a minimum of 48 hours prior to needing surveying.
3. If the requested surveying cannot be accomplished in the time frame
requested by the CONTRACTOR, the survey personnel shall notify the
CONTRACTOR with the date on which the requested work will be
completed.
4. Should a sudden change in the CONTRACTOR's operations or schedule
require the survey personnel to work overtime, the CONTRACTOR shall pay
the additional overtime expense.
5. The CONTRACTOR shall protect all survey monuments and construction
stakes. If it is unavoidable to remove a survey monument or construction
stakes, the CONTRACTOR is responsible for notifying the Surveyor and
allowing enough time for the monuments or stakes to be relocated. The
CONTRACTOR will be responsible for the cost of restaking construction
stakes and for the cost of reestablishing a destroyed monument.
6. The CONTRACTOR shall be responsible for transferring the information
from the construction staked to any necessary forms and for constructing all
pipelines, drainage ways, pavements, inlets, walls, and other structures in
accordance with the information on the stakes and grade sheets supplied by
the OWNER.
B. Supervision: The CONTRACTOR shall have supervision, knowledge of the project
requirements and proper installation, and construction procedures, available in the
field at all times that work is progressing.
PART 2 PRODUCTS (Not Applicable)
PART 3 EXECUTION (Not Applicable)
END OF SECTION
Bobcat Ridge Access Road 01720-1 Field Engineering
Improvements and Surveying
June 2006
THIS PAGE INTENTIONALLY LEFT BLANK.
Bobcat Ridge Access Road 01720-2 Field Engineering
Improvements and Surveying
June 2006
SECTION 01745
ENVIRONMENTAL CONTROLS
PART1 GENERAL
1.01 SECTION INCLUDES
A. The work of this section consists of obtaining permits and providing environmental
controls consistent with regulatory permits through the duration of the work required
under this project.
PART PRODUCTS
2.01 MATERIALS
A. Dust Control: Dust control agents may be necessary in addition to wetting down
with water. Dust control agents may be used only after prior approval by the
OWNER.
PART 3 EXECUTION
3.01 Dust Control Application:
A. The CONTRACTOR shall execute work by methods to minimize raising dust from
construction operations.
B. The CONTRACTOR shall provide and apply dust control at all times, including
evenings, holidays and weekends, as required to abate dust nuisance on and about the
site that is a direct result of construction activities. The use of non -approved
chemicals, oil, or similar palliatives will not be allowed. Dust control agents may be
used only after prior approval of the OWNER. The CONTRACTOR shall be
required to provide sufficient quantities of equipment and personnel for dust control
sufficient to prevent dust nuisance on and about the site.
C. The OWNER will have authority to order dust control work whenever in its opinion
it is required, and there shall be no additional cost to the OWNER. The
CONTRACTOR shall be expected to maintain dust control measures effectively
whether the OWNER or ENGINEER specifically orders such Work.
3.02 PRESERVATION OF NATURAL FEATURES
A. Confine operations as much as possible. Exercise special care to maintain natural
surroundings in an undamaged condition. Within the work limits, barricade trees,
rock outcroppings, and natural features to be preserved.
3.03 HOUSEKEEPING
A. Keep project neat, orderly, and in a safe condition at all times. Store and use
equipment, tools, and materials in a manner that does not present a hazard.
Bobcat Ridge Access Road 01745-1 Environmental Controls
Improvements
June 2006
DIVISION 1 - GENERAL REQUIREMENTS
SECTION 01110
SECTION 01140
SECTION 01145
SECTION 01180
SECTION 01310
SECTION 01320
SECTION 01330
SECTION 01425
SECTION 01450
SECTION 01555
SECTION 01635
SECTION 01650
SECTION 01710
SECTION 01715
SECTION 01720
SECTION 01745
SECTION 01780
Bobcat Ridge Access Road
Improvements
June 2006
SUMMARY OF WORK
CONTRACTOR'S USE OF PREMISES
SPECIAL PROJECT PROCEDURES
UTILITY SOURCES
PROJECT MEETINGS
CONSTRUCTION SCHEDULES
SUBMITTALS
STANDARD REFERENCES
MATERIALS TESTING
TRAFFIC REGULATION
SUBSTITUTIONS AND PRODUCT
OPTIONS
MATERIAL DELIVERY, STORAGE,
AND HANDLING
SITE CONDITIONS
TREE, LANDSCAPE, VEGETATION,
AND WETLAND PROTECTION
FIELD ENGINEERING AND SURVEYING
ENVIRONMENTAL CONTROLS
CONTRACT CLOSEOUT
Immediately remove all rubbish. Do not allow rubbish to accumulate. Provide on -
site containers for collection of rubbish and dispose of it at frequent intervals during
progress of work.
3.04 DISPOSAL
A. Disposal of Waste (Unsuitable) Materials: All material determined by the
ENGINEER to be waste will be disposed of in approved landfill in a manner meeting
all regulations. Dispose of waste materials, legally, at public or private dumping
areas. Do not bury wastes inside of the limits of construction. All costs for dump
fees, permits, etc., to be borne by the CONTRACTOR.
B. Disposal of Garbage and Other Construction Materials: Provide sanitary
containers/dumpsters and haul away contents such that no overflow exists.
C. Excess excavation shall become the property of the CONTRACTOR and shall be
legally disposed of by him outside the limits of construction to an approved disposal
site. Excess excavated material suitable for backfill shall not be disposed of until all
backfill operations are complete.
D. The CONTRACTOR is to immediately inform ENGINEER of any hazardous
materials encountered during construction. Dispose of waste materials legally at
private or public facilities.
3.05 BURNING
A. No burning of debris will be permitted.
3.06 WATER CONTROL
A. The project work is located within a natural drainage course is subject to periodic
flooding due to rainfall and snowmelt, flows for adjacent developed areas and storm
water pipes and ground water flows from saturated soils or other ground water
sources. Refer to Section 02240 for Water Control and Dewatering requirements.
3.07 NOISE CONTROL
A. All mechanical equipment shall be equipped with the best available mufflers to
reduce noise. The CONTRACTOR shall be responsible for obtaining any necessary
permits and shall limit noise to the permitted levels. Noise level monitoring shall be
performed by the CONTRACTOR as necessary to show that the permitted levels are
not being exceeded.
3.08 PERMITS
A. All work must be performed in accordance with all applicable regulatory permits.
It shall be the responsibility of the CONTRACTOR to obtain a Groundwater
Discharge (402) Permit from the Colorado Department of Public Health and
Environment for any dewatering operations that will be discharged into any
Bobcat Ridge Access Road 01745-2 Environmental Controls
Improvements
June 2006
dramageways, open channels, or irrigation ditches. The CONTRACTOR shall be
responsible for any testing required under the 402 Permit.
It shall also be the responsibility of the CONTRACTOR to apply for and obtain a
State of Colorado Stormwater Discharge Permit. All costs for this permit shall be the
responsibility of the CONTRACTOR.
B. The OWNER will obtain the following permits:
• (None)
C. It shall be the responsibility of the CONTRACTOR to prepare and obtain an
approved Erosion and Sediment Control Plan from the OWNER. The
CONTRACTOR must obtain all other applicable permits.
END OF SECTION
Bobcat Ridge Access Road 01745-3 Environmental Controls
Improvements
June 2006
THIS PAGE INTENTIONALLY LEFT BLANK.
Bobcat Ridge Access Road 01745-4 Environmental Controls
Improvements
June 2006
SECTION 01780
CONTRACT CLOSEOUT
PART1 GENERAL
1.01 SECTION INCLUDES
A. The following project closeout procedure defines the responsibilities of the
CONTRACTOR, OWNER, and ENGINEER in closing the project:
Step 1: CONTRACTOR advises the ENGINEER in writing that he has reached
"Substantial Completion" and provides a list of items to be completed or corrected.
Closeout may be conducted by areas or portions of the work if requested by the
OWNER.
Step 2: ENGINEER inspects the work to determine if it is substantially complete,
and issues a Certificate of Substantial Completion plus a "Punch List" of items to be
completed or corrected.
Substantial Completion - Definition
Reference General Conditions, Substantial Completion
Step 3: CONTRACTOR completes and/or corrects all punch list items and notifies
the ENGINEER in writing that his work is ready for final inspection. At this time, a
final application for payment is submitted.
Step 4: ENGINEER makes final inspection. When the work is found to be
acceptable under the Contract Documents, and the Contract fully performed, the
ENGINEER will issue a final Certificate for Payment.
B. Final Paperwork:
Prior to Final Payment and Acceptance, the CONTRACTOR shall deliver the
following items to the ENGINEER:
1. CONTRACTOR's Two -Year Correction Period.
2. All Guarantees, Warranties and Submittals, as specified.
3. Receipts for Extra Materials Delivered to the OWNER.
4. Final Application for Payment.
5. Consent of Surety to Final Payment.
6. CONTRACTOR's Affidavit of Release of Liens.
7. Releases from Property Owners for Special Easements.
8. Project Record Documents.
Bobcat Ridge Access Road 01780-1 Contract Closeout
Improvements
June 2006
9. Red -lined as -built drawings (a.k.a. "Drawings of Record" or "Record
Drawings").
C. Definition for Substantial Completion
1. All of the following work must be complete:
a. The gravel road from the intersection of County Road 32C and
County Road 27 up to the entrance to the Bobcat Ridge parking Lot.
b. All culverts shall be completed and in place including all riprap
protection and guardrails.
C. The stormwater overflow channel shall be completed to final grades
and revegetated.
d. The inverted siphon shall be complete and in place and capable of
conveying ditch flows.
D. Definition for Final Completion
1. All Work must be complete for Final Completion.
PART 2 PRODUCTS (Not Applicable)
PART 3 EXECUTION (Not Applicable)
END OF SECTION
Bobcat Ridge Access Road 01780-2 Contract Closeout
Improvements
June 2006
DIVISION 2 — SITE WORK
02220
REMOVAL OF STRUCTURES AND OBSTRUCTIONS
02230
CLEARING AND GRUBBING
02235
TOPSOIL
02240
WATER CONTROL AND DEWATERING
02315
EXCAVATION AND EMBANKMENT
02320
TRENCH EXCAVATION AND BACKFILL
02321
CONTROLLED LOW STRENGTH MATERIAL BACKFILL
(FLO-FILL)
02370
EROSION AND SEDIMENT CONTROL
02375
RIPRAP
02613
PRE -CAST REINFORCED CONCRETE BOX CULVERT
02615
DUCTILE IRON PIPE
02620
LOW PRESSURE PLASTIC PIPE
02710
AGGREGATE BASE COURSE
02740
FLEXIBLE PAVEMENT
02920
LAWNS AND GRASSES
Bobcat Ridge Access Road
Improvements
June 2006
No Text
SECTION 02220
REMOVAL OF STRUCTURES AND OBSTRUCTIONS
PART1 GENERAL
1.01 SECTION INCLUDES
A. This work consists of the removal and disposal of trees, slope and ditch
protection, steel siphon, footings, abandoned piping, conduits and direct bury
cable, abandoned utility services, curb, gutter, pipes, sidewalk, appurtenances,
fences, foundations, pavements, pavement markings, and any other obstructions
that are not designated or permitted to remain. It shall also include salvaging,
stockpiling and loading salvable materials, sandblasting, plugging structures,
cleaning culverts, and sawing and cutting to facilitate controlled breaking and
removal of concrete and asphalt to a neat line. Except in areas to be excavated,
the resulting trenches, holes, and pits shall be backfilled.
B. Materials removed and not designated to be salvaged or incorporated into the
work shall become the property of the CONTRACTOR.
C. Materials removed and designated to be salvaged shall become the property of
the OWNER.
1.02 RELATED SECTIONS
A. Section 02230 — Clearing and Grubbing
B. Section 02315 — Excavation and Embankment
PART 2 PRODUCTS (Not Applicable)
PART 3 EXECUTION
3.01 CONSTRUCTION REQUIREMENTS
A. General: The CONTRACTOR shall raze, remove, and dispose of all structures
and obstructions which are identified on the project, except utilities, structures
and obstructions removed under other contractual agreements or as otherwise
provided for in the Contract Documents, and salvable material designed to
remain the property of the OWNER.
Prior to removing structures the CONTRACTOR is responsible for having all
utilities disconnected and for all expenses associated with disconnecting and
abandoning utility service lines. Payment for any utility disconnection shall be
included in the unit price for structure removal.
The CONTRACTOR and ENGINEER shall field measure and agree upon the
quantity to be removed before the work commences. Should the
CONTRACTOR fail to request the ENGINEER to measure any work, the
CONTRACTOR will not be compensated for materials that were not measured
by the ENGINEER.
Bobcat Ridge Access Road 02220-1 Removal of Structures
Improvements and Obstructions
June 2006
The accepted quantities will be paid for at the contract unit price. Saw cutting,
excavation, backfill, haul disposal, and stockpiling of materials will not be
measured and paid for separately. This cost shall be included in the unit price for
each bid item.
B. Salvable Material: All salvable material designated in the Contract or by the
ENGINEER to remain the property of the OWNER shall be removed without
damage, in sections or pieces which may be readily transported, and shall be
stockpiled by the CONTRACTOR at specified locations within the project limits.
The CONTRACTOR shall safeguard salvable materials and shall be responsible
for the expense of repairing or replacing damaged or missing material until it is
incorporated into the work, or is loaded onto the OWNER's equipment by the
CONTRACTOR.
C. Signs: Removal of signs shall include removal of posts, footings, pedestals, sign
panels, and brackets. Concrete adhering to salvable sign posts shall be removed.
Removal of sign panel shall include removal of the panel and its attachment
hardware from the existing installation and adjusting the spacing of the
remaining panels.
D. Pavements Sidewalks, and Curbs: All pavements, sidewalks, structures, curbs,
gutters, etc., designated for removal, shall be disposed of off -site by the
CONTRACTOR at his expense. Sawing of concrete and asphalt shall be done to
a true line, with a vertical face, unless otherwise specified. The minimum depth
of a saw cut shall be 2 inches. For reinforced concrete, the minimum depth shall
be 2 inches, or to the depth of the reinforcing steel, whichever occurs first.
Sections of concrete or asphalt which, due to the CONTRACTOR'S negligent
operations, crack or break beyond the limits of construction, shall be saw cut,
removed and replaced at the CONTRACTOR'S expense. The limit and
responsibility of the repair will be determined by the ENGINEER. All saw
cutting associated with removal items shall be considered incidental to the work
and will not be measured or paid for separately under this item.
END OF SECTION
Bobcat Ridge Access Road 02220-2 Removal of Structures
Improvements and Obstructions
June 2006
SECTION 02230
CLEARING AND GRUBBING
PART1 GENERAL
1.01 SECTION INCLUDES
A. This work consists of clearing, grubbing, removing, and disposing of vegetation and
debris within the limits of the project site as shown on the Drawings and as required
by the Work. Vegetation and objects designated to remain shall be preserved free
from injury or defacement.
1.02 RELATED SECTIONS
A. Section 02315 - Excavation and Embankment
PART 2 PRODUCTS (Not Applicable)
PART 3 EXECUTION
3.01 CONSTRUCTION REQUIREMENTS
A. The OWNER will designate all trees, shrubs, plants, and other objects to remain.
Any object that is designated to remain and is damaged shall be repaired or replaced
as directed by the OWNER, at the CONTRACTOR's expense.
Clearing and grubbing shall extend to the toe of fill or the top of cut slopes, unless
otherwise designated. All surface objects, trees, stumps, roots, and other protruding
obstructions not designated to remain shall be cleared and grubbed, including
mowing, as required. Undisturbed stumps, roots, and nonperishable solid objects
located two feet or more below subgrade or embankment slope may remain in place.
In areas to be rounded at the tops of backslopes, stumps shall be removed to at least
two feet below the surface of the final slope line.
Except in areas to be excavated, all holes resulting from the removal of obstructions
shall be backfilled with suitable material and compacted in accordance with Section
02315.
No material or debris shall be disposed of within the project limits.
All cleared timber shall be removed from the project and shall become the property
of the CONTRACTOR. All trimming shall be done in accordance with good tree
surgery practices. The maximum tree diameter included for removal in this section
shall be 12 inches.
The CONTRACTOR shall scalp the areas within the excavation or embankment
grading limits. Scalping shall include the removal from the ground surface of
sawdust, and other vegetation matter.
END OF SECTION
Bobcat Ridge Access Road 02230-1 Clearing and Grubbing
Improvements
June 2006
No Text
THIS PAGE INTENTIONALLY LEFT BLANK.
Bobcat Ridge Access Road 02230-2 Clearing and Grubbing
Improvements
June 2006
SECTION 02235
TOPSOIL
PART1 GENERAL
1.01 SECTION INCLUDES
A. This work consists of stripping, salvaging and stockpiling topsoil, and excavating
suitable topsoil from stockpiles, contractor sources, available sources, or from the
approved natural ground cover to place on designated areas. It shall include the placing
of topsoil upon constructed cut and fill slopes after grading operations are completed.
1.02 RELATED SECTIONS
A. Section 02230 — Clearing and Grubbing
B. Section 02315 — Excavation and Embankment
PART PRODUCTS
2.01 MATERIALS
A. Topsoil shall consist of loose friable loam free of subsoil, refuse, stumps, roots, rocks,
brush, weeds, heavy clay, hard clods, toxic substances, or other material which would
be detrimental to its use on the project. Topsoil shall consist of natural on -site ground
cover or hauled material from off -site sources.
Wetland topsoil material shall consist of moist organic soil, including any existing
wetland vegetation and seeds, to be excavated from areas as directed by the
ENGINEER or OWNER.
PART 3 EXECUTION
3.01 CONSTRUCTION REQUIREMENTS
A. Topsoil within the limits of the project shall be salvaged prior to beginning hauling,
excavating, or fill operations by excavating and stockpiling the material at designated
locations in a manner that will minimize sediment damage, and not obstruct natural
drainage. Topsoil shall be placed directly upon completed cut and fill slopes whenever
conditions and the progress of construction will permit.
B. No soil stockpile shall exceed ten (10) feet in height. All soil stockpiles shall be
protected from sediment transport by surface roughening, watering, and perimeter silt
fencing. Any soil stockpile remaining after 30 days shall be seeded and mulched.
C. Topsoil shall be placed at locations and to the thickness provided in the Contract
Documents and shall be keyed to the underlying material by the use of harrows, rollers,
or other suitable equipment.
Bobcat Ridge Access Road 02235-1 Topsoil
Improvements
June 2006
D. Water shall be applied to the topsoil as designated in the Contract Documents, in a fine
spray by nozzles or spray bars so the topsoil areas will not be washed or eroded.
E. Salvaged topsoil exceeding the quantity required under the Contract shall be disposed
of at the CONTRACTOR's expense.
F. Wetland topsoil material shall be excavated from designated areas to a minimum depth
of 18 inches, or as otherwise designated. The CONTRACTOR shall prepare the
relocation site to elevations specified and approved by the ENGINEER prior to
excavating the wetlands. If the ENGINEER determines that this is not possible, then
the CONTRACTOR shall stockpile the material in an approved area, to remain
undisturbed until the relocation site has been prepared. Storage time within the
stockpile shall be as short as possible. If deemed necessary by the ENGINEER, the
stockpile will be protected in such a manner to preserve the wetland seed bank.
Wetland topsoil material shall be placed over the prepared relocation areas to a depth of
18 inches, or as otherwise designated.
END OF SECTION
Bobcat Ridge Access Road 02235-2 Topsoil
Improvements
June 2006
SECTION 02240
WATER CONTROL AND DEWATERING
PART1 GENERAL
1.01 SECTION INCLUDES
A. The work of this section consists of controlling groundwater, site drainage, and stonn
flows during construction. The CONTRACTOR is cautioned that the work involves
construction in and around drainage channels, local streams or rivers, and areas of local
drainage. These areas are subject to frequent periodic inundation.
1.02 RELATED SECTIONS
A. Section 02315 — Excavation and Embankments
PART2 PRODUCTS
2.01 MATERIALS
A. On -site materials may be used within the limits of construction to construct temporary
dams and berms. The materials such as plastic sheeting, sand bags, and storm sewer
pipe may also be used if desired by the CONTRACTOR.
PART 3 EXECUTION
3.01 CONSTRUCTION REQUIREMENTS
A. General: For all excavation, the CONTRACTOR shall provide suitable equipment and
labor to remove water, and he shall keep the excavation dewatered so that construction
can be carried on under dewatered conditions where required by the Drawings and
Specifications. Water control shall be accomplished such that no damage is done to
adjacent channel banks or structures. The CONTRACTOR is responsible for
investigating and familiarizing himself with all site conditions that may affect the work
including surface water, level of groundwater and the time of year the work is to be
done. All excavations made as part of dewatering operations shall be backfilled with
the same type material as was removed and compacted to 95% of Maximum Standard
Proctor Density (ASTM D698) except where replacement by other materials and/or
methods are required. The cost for this excavation and backfilling shall be included in
the Construction Dewatering bid item.
The CONTRACTOR shall conduct his operation in such a manner that storm or other
waters may proceed uninterrupted along their existing drainage courses. By submitting
a bid, the CONTRACTOR acknowledges that he has investigated the risk arising from
such waters and has prepared his bid accordingly, and assumes all of said risk.
At no time during construction shall the CONTRACTOR affect existing surface or
subsurface drainage patterns of adjacent property. Any damage to adjacent property
resulting from the CONTRACTOR's alteration of surface or subsurface drainage
patterns shall be repaired by the CONTRACTOR at no additional cost to the OWNER.
Bobcat Ridge Access Road 02240-1 Water Control and Dewatering
Improvements
June 2006
CONTRACTOR shall remove all temporary water control facilities when they are no
longer needed or at the completion of the project.
Pumps and generators used for dewatering and water control shall be quiet equipment
enclosed in sound deadening devices.
B. Surface Water Control: Surface water control generally falls in to the following
categories:
1. Normal low flows along the channel;
2. Storm/flood flows along the channel;
3. Flows from existing storm drain pipelines; and,
4. Local surface inflows not conveyed by pipelines.
The CONTRACTOR shall coordinate, evaluate, design, construct, and maintain
temporary water conveyance systems. These systems shall not worsen flooding, alter
major flow paths, or worsen flow characteristics during construction. The
CONTRACTOR is responsible to ensure that any such worsening of flooding does
not occur. The CONTRACTOR is solely responsible for determining the methods
and adequacy of water control measures.
At a minimum, the CONTRACTOR will be responsible for diverting the quantity of
surface flow around the construction area so that the excavations will remain free of
surface water for the time it takes to install these materials, and the time required for
curing of any concrete or grout. The CONTRACTOR is cautioned that the minimum
quantity of water to be diverted is for erosion control and construction purposes and
not for general protection of the construction -site. It shall be the CONTRACTOR's
responsibility to determine the quantity of water which shall be diverted to protect his
work from damage caused by storm water.
The CONTRACTOR shall, at all times, maintain a flow path for all channels.
Temporary structures such as berms, sandbags, pipeline diversions, etc., may be
permitted for the control of channel flow, as long as such measures are not a major
obstruction to flood flows, do not worsen flooding, or alter historic flow routes.
C. Groundwater Control: The CONTRACTOR shall install adequate measures to
maintain the level of groundwater below the foundation subgrade elevation and
maintain sufficient bearing capacity for all structures, pipelines, earthwork, and rock
work. Such measures may include, but are not limited to, installation of perimeter
subdrains, pumping from drilled holes or by pumping from sumps excavated below
the subgrade elevation. The foundation bearing surfaces are to be kept dewatered
and stable until the structures or other types of work are complete and backfilled.
Disturbance of foundation subgrade by CONTRACTOR operations shall not be
considered as originally unsuitable foundation subgrade and shall be repaired at
CONTRACTOR's expense.
Bobcat Ridge Access Road 02240-2 Water Control and Dewatering
Improvements
June 2006
Any temporary dewatering trenches or well points shall be restored following
dewatering operations to reduce permeability in those areas as approved by the
ENGINEER.
CONTRACTOR is to restore any areas disturbed by the dewatering operations to
their original condition.
D. Contaminated Groundwater Control: CONTRACTOR shall not discharge
contaminated water exceeding local, State and/or Federal limits to above ground
channels or watercourses.
END OF SECTION
Bobcat Ridge Access Road 02240-3 Water Control and Dewatering
Improvements
June 2006
THIS PAGE INTENTIONALLY LEFT BLANK
Bobcat Ridge Access Road
Improvements
June 2006
02240-4 Water Control and Dewatering
SECTION 02315
EXCAVATION AND EMBANKMENT
PART GENERAL
1.01 SECTION INCLUDES
A. This work shall consist of excavation, embankment fill, disposal of excess material,
shaping, and compaction of all material encountered within the limits of work,
including excavation and backfill for structures. The excavation shall include, but is
not limited to, the native soils which must be excavated for the project work. All work
shall be completed in accordance with these Specifications and the lines and grades on
the Drawings.
1.02 DEFINITIONS
A. Unclassified Excavation shall consist of the excavation of all materials on site to final
grades, excluding the bid items included in Section 02220. Excavation of unsuitable
material will only be paid for if it is found to be unsuitable in its original state.
B. Muck Excavation shall consist of the removal and disposal of mixtures of soils and
organic matter not suitable for foundation material and replacement with approved
material. Material damaged due to rain or weather will not be paid for as Muck
excavation and is entirely the responsibility of the CONTRACTOR.
C. Rock Excavation shall consist of igneous, metamorphic and sedimentary rock which
cannot be excavated without the use of rippers, and all boulders or other detached
stones each having a volume of 1/2 cubic yard or more, as determined by physical or
visual measurement. It shall also include replacement with approved material as
required.
D. Embankment (Complete in Place): shall consist of placing all excavated material,
except material being hauled and disposed, as embankment and compacted to final
grades as specified in the Contract Documents and on the Drawings.
1.03 DESCRIPTION
A. This work shall consist of excavation, disposal, placement, and compaction of all
material encountered within the limits of the work, and not being completed under
some other item, necessary for the construction of the project in accordance with the
Specifications and the lines, grades, and typical cross -sections shown on the
Drawings. All excavation will be classified, "unclassified excavation", or "muck
excavation" or "rock excavation", as hereafter described. All embankment will be
classified "embankment material' as hereafter described.
1.04 RELATED SECTIONS
A. Section 02230 — Clearing and Grubbing
B. Section 02240 — Water Control and Dewatering
Bobcat Ridge Access Road 02315-1 Excavation and Embankment
Improvements
June 2006
1.05 QUALITY ASSURANCE
A. Final topography PoSmP Y and/or cross -sections will be surveyed of areas that are to finished
grade and compared to the design section for accuracy. Final grade shall match
design grades within the tolerances discussed in PART 3 EXECUTION.
PART PRODUCTS
2.01 MATERIALS
A. Embankment material may consist of approved material acquired from excavations
or material hauled from outside the project limits. Suitable material identified on -site
shall be used first for embankments and backfill. Excess excavated native soils which
are not used as embankment or backfill shall become the property of the
CONTRACTOR and shall be disposed of off -site by the CONTRACTOR, in a
location acceptable to the ENGINEER.
B. Muck excavation encountered in all areas shall also include the replacement of
excavated muck with uniformly graded rock, riprap, on -site or imported soils, or
other material whichever is most suitable for the specific situation encountered. The
ENGINEER will determine which type of aggregate or other material which shall be
used after observing the specific site conditions.
PART 3 EXECUTION
3.01 GENERAL EXCAVATION/EMBANKMENT
A. General: The excavation and embankment for the project work shall be finished to
reasonably smooth and uniform surfaces. Variation from the subgrade plane shall not
be more than .08 feet in soil or more than .08 feet above or .50 below in rock. Where
bituminous or concrete surfacing materials are to be placed directly on the subgrade,
the subgrade plane shall not vary more than 0.04 feet. Materials shall not be wasted
without percussion of the ENGINEER. Excavation operations shall be conducted so
that material outside of the limits of slopes will not be disturbed. Prior to beginning
grading operations in any area, all necessary clearing and grubbing in that area shall
have been performed in accordance with Section 02230 of these Specifications.
When the CONTRACTOR's excavating operations encounter remains of pre -historic
people's dwelling sites or artifacts of historical or archaeological significance, the
operations, shall be temporarily discontinued. The ENGINEER will contact
archaeological authorities to determine the disposition thereof. When directed, the
CONTRACTOR shall excavate the site in such a manner as to preserve the artifacts
encountered and shall remove them for delivery to the custody of the proper state
authorities. Such excavation will be considered and paid for as extra work.
B. Excavation:
1. Unclassified: All excess suitable material excavated from the project site
and not used for embankment shall be removed from the project site and
become the property of the CONTRACTOR. Where material encountered
Bobcat Ridge Access Road 02315-2 Excavation and Embankment
Improvements
June 2006
within the limit of the work is considered unsuitable for embankment (fills)
on any portion of this project work, such material shall be excavated as
directed by the ENGINEER and replaced with suitable fill material. All
unsuitable excavated material from excavation consisting of any type of
debris (surface or buried), excavated rock, bedrock or rocks larger than 6
inches in diameter and boulders shall be hauled from the project site and
disposed of. Debris is defined as "anything that is not earth which exists at
the job site".
2. Muck: Where excavation to the finished grade section results in a subgrade
or slopes of unsuitable soil, the ENGINEER may require the
CONTRACTOR to remove the unsuitable materials and backfill to the
finished graded section with approved material. Disposal of the material
shall be at the CONTRACTOR's expense.
Good surface drainage shall be provided around all permanent cuts to direct
surface runoff away from the cut face.
3. Rock: Unless otherwise specified, rock shall be excavated to a minimum
depth of 0.5 feet below subgrade within the limits of the channel area, and
the excavation shall be backfilled with material shown on the Drawings or as
designated by the ENGINEER. Disposal of material and replacement with
suitable approved material shall be at the CONTRACTOR's expense.
C. Embankment Construction: Embankment construction shall consist of constructing
all fill areas, including preparation of the areas upon which they are to be placed, and
the placing and compacting of embankment material in holes, pits and other
depressions within the project area. Only approved materials shall be used in the
construction of embankments and backfills.
Approved materials shall consist of clean on -site cohesive soils or approved imported
soils. On -site cohesive soils are suitable for use as compacted fill provided the
following recommendations are met:
Percent Finer by Weight
Gradation (ASTM C136)
'/2-Inch 100
3/8-Inch 70 —100
No. 4 Sieve 50 — 100
No. 200 Sieve 60 (min)
• Liquid Limit 35 (max)
• Plasticity Index 20 (max)
• In -Situ Coefficient of Permeability 1x10-6 cm/sec
Excavation and Embankment will only be paid when a significant change in grade is
required, as determined by the ENGINEER. Minor cuts and fills will be considered
incidental to the work, and will not be paid for separately under this section.
Bobcat Ridge Access Road 02315-3 Excavation and Embankment
Improvements
June 2006
SECTION 01110
SUMMARY OF WORK
PART1 GENERAL
1.01 SECTION INCLUDES
Furnish all labor and install all materials for the Bobcat Ridge Access Road Improvements,
including but not limited to the following items:
The project includes the removal of existing culverts, a steel flume and wooden support
structure, and miscellaneous fencing. The project also includes the construction of a new
gravel road, the installation of two sets of double reinforced concrete box culverts with rock
riprap protection and steel guardrails, the installation of an inverted siphon with concrete
inlet and outlet structures on the Union Ditch, and the excavation of a stormwater overflow
channel. The project also includes the placing of signage, the removal and replacement of
existing fencing, and utility relocation.
1.02 WORK SEQUENCE
A. The Work Sequence is to be submitted as part of the construction schedule required
in Section 01320. Construction of the project shall begin within seven (7) calendar
days of the date of Notice to Proceed.
The date of beginning and the time for completion of the work are essential
conditions of the Contract Documents and the work embraced shall be commenced
on a date specified in the Notice to Proceed.
The Contractor will proceed with the work at such rate of progress to ensure full
completion within the contract time. It is expressly understood and agreed, by and
between the Contractor and the Owner that the contract time for the completion of
the work described herein is a reasonable time, taking into consideration the climatic
and other factors prevailing in the locality of the work.
Every effort shall be made by the Contractor to complete the project within the
"Contract Time" shown in the proposal. The "Contract Time" anticipates "Normal"
weather and climate conditions in and around the vicinity of the Project site during
the times of year that the construction will be carried out. Extensions of time based
upon weather conditions shall be granted only if the Contractor demonstrates clearly
that such conditions were "unusually severe," would not have been reasonably
anticipated, and that such conditions adversely affected the Contractor's work and
thus required additional time to complete the work.
Monthly Anticipated Calendar Days Lost to Adverse Weather Conditions
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
(7) (4) (4) (4) (6) (3) (4) (2) (3) (3) (2) (5)
At the end of each month, if the number of working days for which work was
delayed due to adverse weather exceeds that shown in the above schedule, a Change
Order will be executed which increases the Contract Time. The number of work
days delayed due to adverse weather or the impact thereof will then be converted to
Calendar Days based on the contract completion day and date. This conversion
Bobcat Ridge Access Road 01110-1 Summary of Work
Improvements
June 2006
On -site cohesive soils or imported soils should be placed and compacted in
horizontal lifts, using equipment and procedures that will produce recommended
moisture contents and densities throughout the lift and embankment height. On -site
or imported cohesive soils should be compacted within a moisture content range of
2% below, to 2% above optimum moisture content and compacted to 95% of the
Maximum Standard Proctor Density (ASTM D698).
When embankment is to be placed and compacted on hillsides, or when new
embankment is to be compacted against existing embankments, or when embankment
is built 1/2 width at a time, the slopes that are steeper than 4:1 when measured
longitudinally or at right angles to the adjacent ground shall be continuously benched
over those areas where it is required as the work is brought up in layers. Benching
shall be well keyed and where practical a minimum of 8 feet. Each horizontal cut
shall begin at the intersection of the original ground and the vertical sides of the
previous cuts. Material thus cut out shall be recompacted along with the new
embankment material at the CONTRACTOR's expense.
The ground surface underlying all fills shall be carefully prepared by removing all
organic matter, scarification to a depth of 8 inches and recompacting to 95% of the
Maximum Standard Proctor Density (ASTM D698) at optimum moisture content +
or - 2% prior to fill placement.
Embankment material shall be placed in horizontal layers not exceeding 8 inches
(loose measurement) and shall be compacted to 95% of the Maximum Standard
Proctor Density (ASTM D698) at optimum moisture content + or - 2%. Effective
spreading equipment shall be used on each lift to obtain uniform thickness prior to
compacting. As the compaction of each layer progresses, continuous leveling and
manipulating will be required to assure uniform density.
For embankments which serve as berms, the downstream portion shall be "keyed"
into the subsurface soils a minimum of 3 feet to enhance the stability of the slope.
Materials which are removed from excavations beneath the water table may be over
the optimum moisture content and will require that they be dried out prior to reusing
them.
Cross hauling or other action as appropriate will be ordered when necessary to insure
that the best available material is placed in critical areas of embankments, including
the top 2 feet of all embankments. No additional payment will be made for cross
hauling ordered by the ENGINEER.
Frozen materials shall not be used in construction of embankments.
During the construction of channels, the channel bottom shall be maintained in such
condition that it will be well drained at all times.
Excavation or Embankment (Fill), and Structural Backfill work either completed or
in a stage of completion that is either eroded or washed away or becomes unstable
due to either rains, snow, snow melt, channel flows or lack of proper water control
shall be either removed and replaced, recompacted or reshaped as directed by the
Bobcat Ridge Access Road 02315-4 Excavation and Embankment
Improvements
June 2006
ENGINEER and in accordance with the Drawings and Specifications at the
CONTRACTOR's sole expense. Removed unsuitable materials shall be hauled away
and disposed of at the CONTRACTOR's expense. Placing of replacement materials
for removed unsuitable materials shall be purchased, placed and compacted at the
CONTRACTOR' expense.
D. Proof rolling with a heavy rubber tired roller will be required, if designated on the
Drawings or when ordered by the ENGINEER. Proof rolling shall be done after
specified compaction has been obtained. Areas found to be weak and those areas
which failed shall be ripped, scarified, wetted if necessary, and recompacted to the
requirements for density and moisture at the CONTRACTOR's expense.
Proof rolling shall be done with equipment and in a manner acceptable to the
ENGINEER. Proof rolling as shown on the Drawings or as ordered by the
ENGINEER shall not be measured and paid for separately, but shall be included in
the unit prices bid for the work.
3.02 EXCAVATION AND BACKFILL FOR STRUCTURES
A. Poor foundation material for any of the work shall be removed, by the
CONTRACTOR, as directed by the ENGINEER. The CONTRACTOR will be
compensated for removal and replacement of such materials in accordance with
Muck Excavation.
The CONTRACTOR is cautioned that construction equipment may cause the natural
soils to pump or deform while performing excavation work inside and on footings,
structural floor slabs, or other structure foundation areas.
Foundation materials which are: a) saturated by either surface or subsurface flows
due to the lack of adequate water control or dewatering work by the
CONTRACTOR; b) frozen for any reason; or, c) that are disturbed by the
CONTRACTOR's work or caused to become unacceptable for foundation material
purposes by means of the CONTRACTOR's equipment, manpower, or methods of
work shall be removed and replaced by the CONTRACTOR at his expense.
Dewatering should not be conducted by pumping from inside footing, structural floor
slab, or other structure foundation limits. This may decrease the supporting capacity
of the soils.
Care should be taken when excavating the foundations to avoid disturbing the
supporting materials. Excavation by either hand or careful backhoe soil removal,
may be required in excavating the last few inches of material to obtain the subgrade
of any item of the concrete work.
Any over -excavated subgrades that are due to the CONTRACTOR's actions, shall be
brought back to subgrade elevations by the CONTRACTOR and at his expense in the
following manner:
Bobcat Ridge Access Road 02315-5 Excavation and Embankment
Improvements
June 2006
1. For over -excavations of 2 inches or less, either: Backfill and compact with
an approved granular materials; backfill with 1/2 inch crushed rock; or fill
within concrete at the time of the appurtenant structure concrete pour.
2. For over -excavations greater than 2 inches, backfill and compact with an
approved granular material.
All granular footings, structural floor slabs, or other structure areas shall be
compacted with a vibratory plate compactor prior to placement of concrete,
reinforcing, or bedding materials.
B. Backfill, and fill within 2 feet of and adjacent to all structures and for full height of
the walls, shall be selected non -swelling material. It shall be granular, well graded,
and free from stones larger than 3 inches. Material may be job excavated, but
selectivity will be required as determined by the ENGINEER. Refer to the Drawings
for job specific requirements. Stockpiled material, other than topsoil from the
excavation shall be used for backfilling unless an impervious structural backfill is
specified. The backfill material shall consist of either clean on -site granular materials
free of stones larger than 3 inches in diameter with no more than 20% passing the No.
200 sieve, or equivalent imported materials. All backfill around the structures shall
be consolidated by mechanical tamping. The material shall be placed in 8-inch loose
lifts within a range of 2% above to 2% below the optimum moisture content and
compacted to 95% of Maximum Standard Proctor Density (ASTM D698) for
cohesive soils, or to 70% relative density for pervious material as determined by the
relative density of cohesionless soils test, ASTM D4253.
When specified on the Drawings or as required by the ENGINEER, Class I structural
backfill shall meet the following gradation requirements:
% by Weight Passing
Sieve Size Square Mesh Sieves
2-Inch 100
No. 4 30 - 100
No. 50 10 — 60
No. 200 5 — 20
In addition, this material shall have a liquid limit not exceeding 35 and a plasticity
index of not over 6.
END OF SECTION
Bobcat Ridge Access Road 02315-6 Excavation and Embankment
Improvements
June 2006
SECTION 02320
TRENCH EXCAVATION AND BACKFILL
PART GENERAL
1.01 SECTION INCLUDES
A. This work shall consist of all labor, equipment and materials necessary for
excavation, trenching, and backfilling for utility lines and other related work.
1.02 RELATED WORK
A. Section 02240 — Water Control and Dewatering
B. Section 02315 - Excavation and Embankment
1.03 QUALITY ASSURANCE
A. In -place moisture density tests will be performed to ensure trench backfill
complies with specified requirements. The following minimum tests should be
expected to be performed.
1. Trench bedding - 1 per 200 feet
2. Backfill - 1 per 200 feet
B. Backfill compaction tests will be performed until compaction meets or exceeds
requirements. The cost of "passing" tests will be paid by the OWNER. Costs
associated with "failing" tests shall be paid by the CONTRACTOR.
Pipe bedding shall be tested prior to placement of backfill.
Testing of all bedding and backfill material shall be done in compliance with
OSHA - Excavations.
1.04 PROTECTION
A. Sheeting and Shoring:
The CONTRACTOR shall protect excavations by shoring, bracing, sheet piling,
underpinning, or other methods required to prevent any excessive widening or
sloughing of the trench which may be detrimental to human safety, to the pipe or
appurtenances being installed, or to existing facilities or structures. The latest
requirements of OSHA shall be complied with at all times including trenching
and confined space entry requirements.
The CONTRACTOR shall be responsible for underpinning adjacent structures
which may be damaged by excavation work, including service utilities and pipe
chases.
Bobcat Ridge Access Road 02320-1 Trench Excavation
Improvements and Backfill
June 2006
B. Weather and Frost:
The CONTRACTOR shall protect bottom of excavations and soil adjacent to and
beneath foundations from frost.
1. Do not place backfill, fill, or embankment on frozen surfaces.
2. Do not place frozen materials, snow, or ice in backfill, fill, or
embankments.
3. Do not deposit, tamp, roll, or otherwise mechanically compact backfill in
water.
C. Drainage and Groundwater:
The excavation shall be graded to prevent surface water run-off into trench or
excavation.
1. Maintain excavations and trench free from water during construction.
2. Remove water encountered in the trench to the extent necessary to
provide a firm subgrade, to permit joints to be made in the dry, and to
prevent the entrance of water into the pipeline.
3. Divert surface runoff and use sumps, gravel blankets, well points, drain
lines, or other means necessary to accomplish the above.
4. Maintain the excavation or trench free from water until the structure, or
pipe to be installed therein, is completed to the extent that no damage
from hydrostatic pressure, flotation, or other cause will result.
5. Water shall be prevented from entering into previously constructed
pipe.
6. The storm pipe under construction shall not be used for dewatering.
PART PRODUCTS
2.01 MATERIALS
A. Material used as stabilization in locations where the CONTRACTOR has been
directed to muck excavate shall conform to the following "Foundation Material'
gradation(s). The material shall be uniformly graded V or 1 %z" rock.
CDOT #467
Total Percent Passing
Sieve Size by Weight
2 1/2-Inch -
Bobcat Ridge Access Road 02320-2 Trench Excavation
Improvements and Backfill
June 2006
2-Inch
1 1/2-Inch
1-Inch
34-Inch
3/8-Inch
No. 4
CDOT #67
Sieve Size
1-Inch
%-Inch
3/8-Inch
No. 4
No. 8
Bedding and Pipe Zone Materials:
Well -Graded Sand
100
90 - 100
35-70
10-30
0- 5
Total Percent Passing
by Wei hg-t
100
90 — 100
20-55
0-10
0- 5
Total Percent Passing
Sieve Size by Weieht
3/8inch
100
No. 4
95 - 100
No. 8
80 - 100
No. 16
50 - 85
No. 30
25 - 60
No. 50
10 - 30
No. 100
2 - 10
Squeegee Sand
Total Percent Passing
Sieve Size
by Weight
3/8-Inch
100
No. 200
0-5
CDOT #67
Total Percent Passing
Sieve Size by Weight
1-Inch 100
3/-Inch 90 — 100
3/8-Inch 20 — 55
No. 4 0 — 10
Bobcat Ridge Access Road 02320-3 Trench Excavation
Improvements and Backfill
June 2006
No. 8
0- 5
Note: It will be the responsibility of the CONTRACTOR to locate material
meeting the Specifications, to test its ability to consolidate to at least
70% relative density, and to secure approval of the ENGINEER before
such material is delivered to the project. Relative density shall be
determined as stipulated in ASTM D4253.
C. Backfill:
Backfill shall meet the following requirements:
Use only backfill for trenches which is free from rocks, large roots, other
vegetation or organic matter, and frozen material. No rocks greater than 3 inches
in diameter shall be allowed. Backfill material shall be suitable for future
pavement construction over all trenches.
D. Cut -Off Walls:
Clay Cut -Off Walls: More than 50% shall pass a No. 200 Sieve. The
plasticity index shall be greater than 12.
2. Controlled Low Strength Material Backfill (Flo -Fill -- See Section
02321).
PART 3 EXECUTION
3.01 GENERAL
The following procedures shall be followed by the CONTRACTOR in sequencing his
work.
A. No more than 150 feet of trench shall be left open at any time. The entire trench
shall be backfilled to within 50 feet of the open trench upon conclusion of each
day's work. The trench shall not be backfilled until the pipe installation is
reviewed by the ENGINEER.
B. Trench shall be backfilled within 100 feet of the pipe installation at all times.
C. Clean-up shall be maintained within 400 feet of the trench excavation.
Prior to placement in the trench, all pipe, fittings, and appurtenances shall be
cleaned and examined for defects by the CONTRACTOR. If found defective,
the CONTRACTOR shall reject the defective pipe, fitting, or appurtenance. The
CONTRACTOR shall advise the ENGINEER of all defective materials.
All surplus excavation shall be placed, in an orderly manner. If material is
stockpiled on private property, written permission must be obtained from the
property owner and provided to the ENGINEER.
Bobcat Ridge Access Road 02320-4 Trench Excavation
Improvements and Backfill
June 2006
All muck excavation, bedding, and pipe zone material shall be imported unless
otherwise designated by the OWNER's geotechnical engineer.
Upon completion of the work, all plants, rubbish, unused materials, concrete
forms, and other like material shall be removed from the job site. The site shall
be left in a state of order and cleanliness.
3.02 MAINTENANCE AND CORRECTION
A. Scarify surface, reshape, and compact to required density completed or partially
completed areas of work disturbed by subsequent construction operations or by
adverse weather.
B. Maintain and correct backfill, fill, and embankment settlement and make
necessary repairs to pavement structures, seeding, and sodding which may be
damaged as a result of settlement for the guarantee period.
C. The CONTRACTOR may perform such maintenance and correction by
subcontract.
3.03 OBSTRUCTIONS AND DISPOSAL OF WASTE MATERIAL
The CONTRACTOR shall remove obstructions that do not require replacement from
within the trench or adjacent areas such as tree roots, stumps, abandoned piling, buildings
and concrete structures, frozen material, logs, and debris of all types without additional
compensation. The ENGINEER may, if requested, make changes in the trench alignment
to avoid major obstructions, if such alignment changes can be made within the work
limits without adversely affecting the intended function of the facility. Excavated
materials unsuitable for backfill or not required for backfill shall be disposed of in
accordance with local regulations.
3.04 TRENCH EXCAVATION
All existing asphalt or concrete surfacing shall be saw cut vertically in a straight line, and
removed from the job site prior to starting the trench excavation. This material shall not
be used in any fill or backfill.
The trench shall be excavated so that a minimum clearance of 6 inches is maintained on
each side of the pipe for proper placement and densification of the bedding or backfill
material. The maximum clearance measured at the spring line of the pipe shall be 18
inches regardless of the type of pipe, type of soil, depth of excavation, or the method of
densifying the bedding and backfill.
Except as otherwise dictated by construction conditions, the excavation shall be of such
dimensions as to allow for the proper pipe installation and to permit the construction of
the necessary pipe connections. Care shall be taken to insure that the excavation does not
extend below established grades. If the excavation is made below such grades, the excess
excavation shall be filled in with sand or graded gravel deposited in horizontal layers not
Bobcat Ridge Access Road 02320-5 Trench Excavation
Improvements and Backfill
June 2006
more than 6 inches in thickness after being compacted and shall be moistened as required
to within 2% of the optimum moisture content required for compaction of that soil. After
being conditioned to have the required moisture content, the layers shall be compacted to
the required density.
The CONTRACTOR shall stockpile excavated materials in a safe manner. Stockpiles
shall be graded for proper drainage.
The CONTRACTOR shall place and grade the trench base to the proper grade ahead of
pipe laying. The invert of the trench shall be compacted to provide a firm unyielding
support along entire pipe length.
3.05 SURPLUS EXCAVATION MATERIAL
Surplus excavation shall be disposed of by the CONTRACTOR at his expense.
3.06 FOUNDATIONS ON UNSTABLE SOILS
If the bottom of the excavation is soft or unstable, and in the opinion of the ENGINEER,
cannot satisfactorily support the pipe or structure, a further depth and width shall be
excavated and refilled to 6 inches below grade with material specified in Section 02320
2.01-A as Foundation Material. This material shall provide a firm foundation for the pipe
or structure. From 6 inches below grade to grade, the appropriate bedding material shall
be placed to provide support for the pipe or structure.
3.07 PIPE BEDDING
After completion of the trench excavation and proper preparation of the foundation, a
minimum of six (6) inches- of bedding material shall be placed on the trench bottom for
support under the pipe (See construction details). Bell holes shall be dug deep enough to
provide a minimum of 2 inches of clearance between the bell and the bedding material.
All pipe shall be installed in such a manner as to insure full support of the pipe barrel
over its entire length. After the pipe is adjusted for line and grade and the joint is made,
the bedding material shall be carefully placed and tamped under the haunches of the pipe.
For all types of pipe, the limits of bedding shall be as shown on the trench section details
on the Drawings.
Bedding shall be compacted to 70% relative density in accordance with ASTM D4253.
Care shall be exercised to assure sufficient tamping under the pipe to achieve uniform
support.
3.08 BACKFILL AND COMPACTION
A. Pipes:
The pipe trench shall be backfilled to the limits as shown on the Drawings. The
backfill in all areas shall be compacted by vibrating, tamping, or a combination
thereof to 70% relative density for sand material as determined by the relative
Bobcat Ridge Access Road 02320-6 Trench Excavation
Improvements and Backfill
June 2006
density of cohesionless soils test, ASTM D4253, or to 95% of the Maximum
Standard Proctor Density for cohesive soils as determined by ASTM D698.
All backfill shall be brought up to equal height along each side of the pipe in
such a manner as to avoid displacement. Bedding shall be distributed in 6-inch
maximum lifts over the full width of the trench. Wet, soft or frozen material,
asphalt chunks, or other deleterious substances shall not be used for backfill. If
the excavated material is not suitable for backfill, as determined by the
ENGINEER, suitable material shall be hauled in and utilized and the rejected
material hauled away and disposed of.
Backfilling shall be conducted at all times in a manner to prevent damage to the
pipe or its coating and shall be kept as close to the pipe laying operation as
practical.
Backfilling procedures shall conform to the additional requirements, if any, of
appropriate agencies or private right-of-way agreements.
3.09 RESTORATION
A. Unsurfaced Areas:
All surface cuts shall be, as a minimum, restored to a condition equal to that prior
to construction.
B. Surfaced Areas:
All surface cuts shall be, as a minimum, restored to a condition equal to that prior
to construction. All gravel or paved streets shall be restored in accordance with
the regulations and requirements of the agency having control or jurisdiction over
the street, roadway, or right-of-way.
C. Grassed or Landscaped Areas:
In landscaped or agricultural areas, topsoil, to a depth of 12 inches, shall be
removed from the area of general disturbance and stockpiled. After installation
of all pipelines, appurtenances and structures and completion of all backfill and
compaction, the stockpiled topsoil shall be redistributed evenly over all disturbed
areas. Care should be taken to conform to the original ground contour or final
grading plans.
END OF SECTION
Bobcat Ridge Access Road 02320-7 Trench Excavation
Improvements and Backfill
June 2006
assumes a 5-day work week, Mondays through Fridays, holidays excepted; should
the Contractor have authorization to work weekends and/or holidays, then the
method of conversion of workdays to calendar days would take this into
consideration. The contract time period will then be increased by the number of
calendar days calculated above and a new contract completion day and date will be
set.
The Contractor's schedule must reflect the above -anticipated adverse weather delays
on all weather -dependent activities.
While extensions of time shall be granted for "unusually severe" weather or climate
conditions, the Owner shall make no monetary compensation for any costs to the
Contractor arising out of such delays. The Contractor shall comply with the portions
of the Contract Documents relating to his project schedule and amendments thereto
which result from the "unusually severe" weather condition.
Breakdowns in equipment or lack of performance by the Contractor will not be
considered justification for an extension of time. Liquidated damages will be
assessed as delineated elsewhere.
1. To any preference, priority, or allocation order duly issued by the Owner.
2. To unforeseeable causes beyond the control and without the fault or
negligence of the Contractor, including but not restricted to, acts of God, or
of the public enemy, acts of the Owner, acts of another Contractor in the
performance of a contract with the Owner, fires, floods, epidemics,
quarantine restrictions, strikes, freight embargoes, and abnormal and
unforeseeable weather as provided above.
3. To any delays of Subcontractors occasioned by any of the causes specified in
paragraphs 1 and 2, above.
Other than the conditions above, Contractor is permitted to start the work at
any location within the project site.
The Contractor shall adhere to the construction traffic control requirements
delineated in Section 01555 and on the Drawings.
1.03 UNDERGROUND UTILITIES
A. It shall be the responsibility of the CONTRACTOR to verify the existence and
location of all underground utilities along the route of the work and to coordinate the
construction schedules with these utility owners.
B. Known utilities and structures adjacent to or encountered in the work are shown on
the Drawings. The locations shown are taken from existing records and the best
information available from existing utility plans and from field potholing, however,
it is expected that there may be some discrepancies and omissions in the locations
and quantities of utilities and structures shown. Those shown are for the
convenience of the CONTRACTOR only, and no responsibility is assumed by either
the OWNER or the ENGINEER for their accuracy or completeness.
C. The CONTRACTOR shall field verify all utilities and coordinate construction with 1-IN
utility owners prior to starting construction. The CONTRACTOR shall be
Bobcat Ridge Access Road 01110-2 Summary of Work
Improvements
June 2006
THIS PAGE INTENTIONALLY LEFT BLANK
Bobcat Ridge Access Road 02320-8 Trench Excavation
Improvements and Backfill
June 2006
SECTION 02321
CONTROLLED LOW STRENGTH MATERIAL BACKFILL (FLO-FILL)
PART1 GENERAL
1.01 SECTION INCLUDES
A. The CONTRACTOR shall furnish and place controlled low strength material
(CLSM) backfill and bedding where shown in the Drawings. The pipeline trench
shall be excavated to the proper lines, grades and dimensions and controlled low
strength backfill placed under, along the sides and on top of the pipe. Unless
otherwise shown in the Drawings, a minimum of one foot of controlled low strength
backfill shall be placed over the crown of the pipe.
1.02 RELATED WORK
A. Section 02240 - Water Control and Dewatering
B. Section 02320 — Trench Excavation and Backfill
C. Section 02351 - Trench Excavation
1.03 REFERENCES
A. ASTM C 33 - Concrete Aggregates
B. ASTM C 94 - Specification for Ready -Mixed Concrete
C. ASTM C 143 - Test Method for Slump of Hydraulic Cement Concrete
D. ASTM C 150 - Portland Cement
E. ASTM C 494 - Chemical Admixtures for Concrete
F. ASTM C 618 - Fly Ash in Portland Cement Concrete
G. ASTM D 4832 - Standard Test Method for Preparation and Testing of Soil -Cement
Slurry Test Cylinders
H. ASTM PS 28 - Provisional Standard Test Method for Flow Consistency of
Controlled Low Strength Material
I. ASTM PS 29 - Provisional Standard Test Method for Unit Weight, Yield and Air
Content (Gravimetric) of Controlled Low Strength Material
J. ASTM PS 30 - Provisional Standard Practice for Sampling Freshly Mixed
Controlled Low Strength Material
K. ASTM PS 31 - Provisional Standard Test Method for Ball Drop on Controlled Low
Strength Material to Determine Suitability for Load Application
Bobcat Ridge Access Road 02321-1 Controlled Low Strength
Improvements Material Backfill (Flo -Fill)
June 2006
1.04 SUBMITTALS:
A. A minimum of two days prior to starting CLSM work, CLSM shall be submitted for
review and approval. No changes shall be made in the amounts or sources of the
approved mix ingredients without the approval of the ENGINEER. Product
inspection and field testing of the approved mix may be made by, or on -behalf of,
the OWNER.
PART PRODUCTS
2.01 MATERIALS
A. General: The CLSM bedding shall consist of a mixture of sand, coarse aggregate,
cement and water. Fly ash and approved admixtures may be used to obtain the
required properties of the mix. The mix shall have good workability and flowability
with self -compacting and self -leveling characteristics.
1. Cut -Off Walls and Structural Backfill:
The CLSM shall have a minimum cement content of 160 pounds per cubic yard
(i.e. 2 sacks of cement). The water-cementitious materials ratio of the mix shall
not exceed that recommended by the Supplier.
2. Around Stormwater Inlets and all other areas:
The CLSM shall have a minimum cement content of 40 pounds per cubic yard
(i.e. '/2 sack of cement). The water-cementitious materials ratio of the mix shall
not exceed 3.5:1
B. Cement: All cement used shall be Type II Portland cement which shall conform to
the requirements of ASTM C 150.
C. Fly Ash: Fly ash may be either Class C or Class F. The fly ash shall conform to
ASTM C 618.
D. Aggregates:
Fine Aggregate: All fine aggregate shall conform to the grading and quality
requirements of ASTM C 33.
2. Coarse Aggregate: Coarse aggregate shall conform to the grading and
quality requirements of ASTM C 33 for size No. 476, No. 57 or No. 67.
E. Water: The batch mixing water and mixer washout water shall conform to the
requirements of ASTM C 94.
F. Admixtures: Chemical admixtures that do not contain calcium chloride and conform
to ASTM C 494 for concrete may be used in the CLSM mix. All chemical
admixtures shall be compatible with the cement and all other admixtures in the
batch.
Bobcat Ridge Access Road 02321-2 Controlled Low Strength
Improvements Material Backfill (Flo -Fill)
June 2006
G. CLSM Proportions:
Strength: CLSM containing '/z sack or 40 pounds of cement shall have a
minimum 28 day compressive strength of 60 psi and maximum 28 day
compressive strength of 100 psi when molded and cured as in conformance
with ASTM D 4832.
2. Air -Entrainment: All CLSM shall be air entrained to a total air content of
approximately 5%.
3. Slump: The minimum slump of CLSM containing '/z sack or 40 pounds of
cement shall be six inches and the maximum slump shall be eight inches as
when tested in accordance with ASTM PS 28.
4. Aggregate: Fine aggregate shall be between 50% and 60% by volume of the
total aggregates in the CLSM mix.
5. Consistency: The consistency of the CLSM slurry shall be such that the
material flows easily into all openings between the pipe and the lower
portion of the trench. When trenches are on a steep slope, a stiffer mix of
slurry may be required to prevent CSLM from flowing down the trench.
When a stiffer mix is used, vibration shall be performed to ensure that the
CLSM slurry completely fills all spaces between the pipe and the lower
portion of the trench.
PART 3 EXECUTION
3.01 PLACEMENT
A. CLSM shall be used as an alternative to backfill and as a bedding material, as
directed by the ENGINEER.
Rodding, mechanical vibration and compaction of CLSM shall be performed to
assist in consolidating the CLSM.
CLSM shall be placed as closely behind pipe laying operations as possible.
When required to prevent uplift, the CLSM shall be placed in two stages as required,
allowing sufficient time for the initial set of the first stage before the remainder is
placed. CLSM shall be deposited as nearly as practical in its final position and in no
way disturb the pipe trench or cause foreign material to become mixed with the
CLSM.
Soil backfill shall not be placed until the CLSM has reached the initial set. If
backfill is not to be placed over the CLSM within 8 hours, a 6-inch cover of moist
earth shall be placed over the CLSM surface.
If the air temperature is 500 F or less, the moist earth cover should be at least 18-
inches thick. CLSM shall not be placed when the air temperature is below 400 F
unless the air temperature is 350 F or more and the temperature is rising.
Bobcat Ridge Access Road 02321-3 Controlled Low Strength
Improvements Material Backfill (Flo -Fill)
June 2006
CLSM shall not be placed, if, in the judgment of the ENGINEER, weather
conditions are unsuitable.
CLSM shall not be placed when the trench bottom or walls are frozen or contain
frozen materials.
END OF SECTION
Bobcat Ridge Access Road 02321-4 Controlled Low Strength
Improvements Material Backfill (Flo -Fill)
June 2006
SECTION 02370
EROSION AND SEDIMENT CONTROL
PART GENERAL
1.01 SECTION INCLUDES
A. This work shall consist of temporary measures needed to control erosion and water
pollution. These temporary measures shall include, but not be limited to, berms,
dikes, dams, sediment basins, fiber mats, netting, gravel, mulches, grasses, slope
drains and other erosion control devices or methods. These temporary measures shall
be installed at the locations where needed to control erosion and water pollution
during the construction of the project, and as directed by the ENGINEER, and as
shown on the Drawings.
B. The erosion control measures presented in the Drawings serves as a minimum for the
requirements of erosion control during construction. The CONTRACTOR has the
ultimate responsibility for providing adequate erosion control and water quality
throughout the duration of the project. Therefore, if the provided plan is not working
sufficiently to protect the project areas, then the CONTRACTOR shall provide
additional measures as required to obtain the required protection. The
CONTRACTOR shall include in his bid price for erosion control a minimum of all
items shown on the Erosion Control Plan and any additional items that may be
needed to control erosion and water pollution.
1.02 RELATED SECTIONS
A. Section 02240 — Water Control and Dewatering
1.03 SUBMITTALS
A. Construction schedule for Erosion Control per subsection 3.01
B. Sequencing Plan per subsection 3.12
PART PRODUCTS
2.01 MATERIALS
A. Materials may include hay bales, straw, fiber mats, fiber netting, wood cellulose,
fiber fabric, gravel and other suitable materials, and shall be reasonably clean, free of
deleterious materials, and certified weed free. All materials shall be submitted for
approval prior to installation.
B. Temporary grass cover (if required) shall be a quick growing species suitable to the
area, which will provide temporary cover and will not later compete with the grasses
sown for permanent cover. All grass seed shall be approved by the ENGINEER prior
to installation.
Bobcat Ridge Access Road 02370-1 Erosion and Sediment Control
Improvements
June 2006
C. Fertilizer and soil conditioners shall be approved by the ENGINEER prior to
installation.
PART 3 EXECUTION
3.01 CONSTRUCTION REQUIREMENTS
A. When so indicated in the Contract Documents, or when directed by the ENGINEER,
the CONTRACTOR shall prepare construction schedules for accomplishing
temporary erosion control work. These schedules shall be applicable to clearing and
grubbing, grading, structural work, construction, etc. He shall also submit for
acceptance his proposed method of erosion control on haul roads and borrow pits and
his plan for disposal of waste material. Work shall not be started until the erosion
control schedules and methods of operations have been accepted.
B. The CONTRACTOR will be required to incorporate all permanent erosion control
features into the project at the earliest practicable time as outlined in his accepted
schedule. Temporary erosion control measures will then be used to correct
conditions that develop during construction.
C. The erosion control features installed by the CONTRACTOR shall be adequately
maintained by him until the project is accepted.
D. In the event of conflict between these requirements and erosion and pollution control
laws, rules, or regulations of other Federal, State or local agencies, the more
restrictive laws, rules, or regulations shall apply.
3.02 PERMITS AND COMPLIANCE
A. The CONTRACTOR must apply for and obtain a Construction Dewatering Permit
402 from the Colorado Department of Public Health and Environment. All costs for
this permit shall be the responsibility of the CONTRACTOR. This permit requires
that specific actions be performed at designated times. The CONTRACTOR is
legally obligated to comply with all terms and conditions of the permit including
testing for effluent limitations.
The CONTRACTOR shall allow the Colorado Department of Public Health and
Environment or other representatives to enter the site to test for compliance with the
permit. Non compliance with the permit can result in stoppage of all work.
The CONTRACTOR must apply for and obtain a State of Colorado Stormwater
Discharge Permit. All costs for this permit shall be the responsibility of the
CONTRACTOR. This permit requires that specific actions be performed at
designated times. The CONTRACTOR is legally obligated to comply with all terms
and conditions of the permit. Non compliance with the permit can result in stoppage
of all work.
In addition to permit requirements, the OWNER shall also monitor the
CONTRACTOR's erosion control and work methods. If the overall function and
Bobcat Ridge Access Road 02370-2 Erosion and Sediment Control
Improvements
June 2006
intent of erosion control is not being met, then the OWNER shall require the
CONTRACTOR to provide additional measures as required to obtain the desired
results. Costs for any additional erosion control measures shall be the responsibility
of the CONTRACTOR, since he has the ultimate responsibility for providing
adequate erosion control and water quality for the duration of the project.
3.03 STABILIZATION OF DISTURBED AREAS
A. Temporary sediment control measures shall be established within 5 days from time of
exposure/disturbance. Permanent erosion protection measures shall be established
within 5 days after final grading of areas.
3.04 PROTECTION OF ADJACENT PROPERTIES
A. Properties adjacent to the site of a land disturbance shall be protected from sediment
deposition. In addition to the erosion control measures required on the Drawings,
perimeter controls may be required if damage to adjacent properties is likely.
Perimeter controls include, but are not limited to, a vegetated buffer strip around the
lower perimeter of the land disturbance, sediment barriers such as straw bales and silt
fences; sediment basins; or a combination of such measures. Vegetated buffer strips
may be used only where runoff in sheet flow is expected and should be at least 20
feet in width.
3.05 TIMING AND STABILIZATION OF SEDMENT AND EROSION CONTROL
MEASURES
A. Sediment barriers, perimeter dikes, and other measures intended to either trap
sediment or prevent runoff from flowing over disturbed areas must be constructed as
a first step in grading and be made functional before land disturbance takes place.
Earthen structures such as dams, dikes, and diversions must be stabilized within 5
days of installation. Stormwater outlets must also be stabilized prior to any upstream
land disturbing activities.
3.06 STABILIZATION OF WATERWAYS AND OUTLETS
A. All on -site stormwater conveyance channels used by the CONTRACTOR for
temporary erosion control purposes shall be designed and constructed with adequate
capacity and protection to prevent erosion during storm and runoff events.
Stabilization adequate to prevent erosion shall also be provided at the outlets of all
pipes and channels.
3.07 STORM SEWER INLET PROTECTION
A. All storm sewer inlets which are made operable during construction or which drain
stormwater runoff from a construction site shall be protected from sediment
deposition by the use of filters.
Bobcat Ridge Access Road 02370-3 Erosion and Sediment Control
Improvements
June 2006
3.08 WORKING IN OR CROSSING WATERCOURSES AND WETLANDS
A. Construction vehicles should be kept out of watercourses to the extent possible.
Where in -channel work is necessary, precautions must be taken to stabilize the work
area during construction to minimize erosion. The channel (including bed and banks)
must always be restabilized immediately after in -channel work is completed.
B. Where a live (wet) watercourse must be crossed by construction vehicles during
construction, a temporary crossing must be provided for this purpose. If the crossing
involves a pipe or other type of conduit placed in the watercourse, the pipe shall be
sized to allow unrestricted passage of all flows anticipated to be carried by the
watercourse. Likewise, installation of a span -type crossing across the watercourse
shall be placed so no restriction of anticipated flows occur.
3.09 CONSTRUCTION ACCESS ROUTES
A. Wherever construction vehicles enter or leave a construction site, a stabilized
construction entrance and Tracking Pad are required. Where sediment is transported
onto a public road surface, the roads shall be cleaned thoroughly at the end of each
day. Sediment shall be removed from roads by shoveling or sweeping and be
transported to a sediment controlled disposal area. Street washing shall be allowed
only after sediment is removed in this manner.
3.10 DISPOSITION OF TEMPORARY MEASURES
A. All temporary erosion and sediment control measures shall be disposed of within 30
days after final site stabilization is achieved or after the temporary measures are no
longer needed as determined by the OWNER. Trapped sediment and other disturbed
soil areas resulting from the disposition of temporary measures shall be permanently
stabilized to prevent further erosion.
3.11 MAINTENANCE
A. All temporary and permanent erosion and sediment control practices must be
maintained and repaired as needed to assure continued performance of their intended
function.
3.12 SEQUENCING
A. The CONTRACTOR shall submit a sequencing plan for approval for erosion control
in conformance with his overall Construction Plan for approval by the OWNER.
Changes to the Erosion Control Sequencing Plan may be considered by the OWNER
only if presented in writing by the CONTRACTOR.
3.13 SUBSTANTIAL COMPLETION OF EROSION CONTROL MEASURES
A. At the time specified in the Contract Documents, and subject to compliance with
specified materials and installation requirements, the CONTRACTOR will receive a
Substantial Completion Certificate for temporary erosion control measures.
Bobcat Ridge Access Road 02370-4 Erosion and Sediment Control
Improvements
June 2006
3.14 MAINTENANCE OF EROSION CONTROL MEASURES AFTER SUBSTANTIAL
COMPLETION
A. The CONTRACTOR will be responsible for maintaining temporary erosion control
measures as specified in the Drawings and Contract Documents until such time as the
disturbed drainage area has stabilized as determined by the ENGINEER and the
OWNER.
3.15 FINAL COMPLETION AND ACCEPTANCE OF EROSION CONTROL MEASURES
A. After the ENGINEER and OWNER have determined that the drainage area has
stabilized, the CONTRACTOR shall remove all remaining temporary erosion control
measures. Any damage to the site shall be repaired to the satisfaction of the
ENGINEER and at no cost to the OWNER.
END OF SECTION
Bobcat Ridge Access Road 02370-5 Erosion and Sediment Control
Improvements
June 2006
D.
E.
PART 2
PART
responsible for protecting utilities during construction and scheduling utility
adjustments to eliminate conflict with progress of the work.
The CONTRACTOR shall notify the ENGINEER immediately of any field
condition not consistent with the contract documents.
The CONTRACTOR will be responsible for repairing or paying for the repairs to
any damaged utilities.
PRODUCTS (Not Applicable)
EXECUTION (Not Applicable)
END OF SECTION
Bobcat Ridge Access Road 01110-3 Summary of Work
Improvements
June 2006
THIS PAGE INTENTIONALLY LEFT BLANK
Bobcat Ridge Access Road 02370-6 Erosion and Sediment Control
Improvements
June 2006
SECTION 02375
RIPRAP
PART1 GENERAL
1.01 SECTION INCLUDES
A. The work of this section shall include excavation, grading and installation of all
riprap, and bedding placed at the locations shown on the Drawings. The materials to
be used for the construction of such structures shall be as specified herein.
1.02 RELATED SECTIONS
A. Section 02240 — Water Control and Dewatering
B. Section 02315 — Excavation and Embankment
1.03 SUBMITTALS
A. The CONTRACTOR shall cooperate with the ENGINEER in obtaining and
providing samples of all specified materials. The CONTRACTOR shall submit
certified laboratory test certificates for all items required in this section.
PART PRODUCTS
2.01 MATERIALS
A. Riprap:
Riprap used shall be the type designated on the Drawings and shall conform to the
following:
Riprap Designation
% Smaller Than Given
Intermediate Rock
d50 *
Size By Weight
Dimension (Inches)
(Inches)
Type VL (Class 6)
70 - 100
12
6
50- 70
9
35 - 50
6
2- 10
2
Type L (Class 9)
70 - 100
15
9
50- 70
12
35 - 50
9
2- 10
3
Type M (Class 12)
70 - 100
21
12
50- 70
18
35 - 50
12
2- 10
4
Bobcat Ridge Access Road 02375-1 Riprap
Improvements
June 2006
Type H (Class 18) 70 - 100
30 18
50- 70
24
35 - 50
18
2- 10
6
Type VH (Class 24) 70 - 100
42 24
50- 70
33
35 - 50
24
2- 10
9
* d50 = Mean Particle Size
The riprap designation and total thickness of riprap shall be as shown on the
Drawings. The maximum stone size shall not be larger than the thickness of
the riprap.
2. The specific gravity of the riprap shall be 2.65 or greater.
3. Neither width nor thickness of a single stone of riprap shall be less than 1/3
of its length.
4. Broken concrete or asphalt pavement shall not be acceptable for use in the
work. Rounded riprap (river rock) is not acceptable unless specifically
designated on the Drawings.
5. The color of the riprap shall be as approved by the OWNER prior to delivery
to the project site. Color shall be consistent on the entire project and shall
match the color of rock to be used for all other portions of the work. Color
required for this project shall be green -gray rock.
6. Minimum density for acceptable riprap shall be 165 pounds per cubic foot.
The specific gravity shall be according to the bulk -saturated, surface -dry
basis, AASHTO T85.
7. The riprap shall have a percentage loss of not more than 40 percent after 500
revolutions when tested in the Los Angeles machine in accordance with
AASHTO Test T96.
8. The riprap shall have a percentage loss of not more than 10 percent after 5
cycles when tested in accordance with AASHTO Test T104 for ledge rock
using sodium sulfate.
9. The riprap shall have a percentage loss of not more than 10 percent after 12
cycles of freezing and thawing when tested in accordance with AASHTO
Test T103 for ledge rock, procedure A.
10. Rock shall be free of calcite intrusions.
Bobcat Ridge Access .Road 02375-2 Ripmp
Improvements
June 2006 _
11. Each load of riprap shall be reasonably well graded from the smallest to the
largest size specified. Stones smaller than the 2-10 percent size will not be
permitted in an amount exceeding 10 percent by weight of each load.
Control of gradation will be by visual inspection. However in the event the
ENGINEER determines the riprap to be unacceptable, the ENGINEER will
pick 2 random truck loads to be dumped and checked for gradation.
Mechanical equipment and labor needed to assist in checking gradation shall
be provided by the CONTRACTOR at no additional cost.
B. Bedding:
Gradation for Granular Bedding
U.S. Standard
Percent by Weight Passing
Square Mesh Sieves
Sieve Size
Type I
IWe H
3 Inch
90 - 100
1-'/z Inch
3/ Inch
20 - 90
3/8 Inch
100
No. 4
95 —100
0 - 20
No. 16
45 - 80
No. 50
10- 30
No. 100
2- 10
No. 200
0 - 2
0 - 3
Granular bedding designation and total thickness of bedding shall be as shown on the
Drawings. Granular bedding shall meet the same requirements for specific gravity,
absorption, abrasion, sodium sulfate soundness, and freeze -thaw durability as
required for riprap and specified above.
C. Geotextile Fabric:
Where soil conditions dictate, geotextile fabric shall be placed directly on excavated
slopes, channel beds, etc. prior to the placement of any riprap bedding or riprap. The
extent and location of geotextile placement will be shown on the Drawings.
Geotextile fabric shall be Trevira S1120 or approved equal under all riprap.
PART 3 EXECUTION
3.01 CONSTRUCTION REQUIREMENTS
A. Channel slopes, bottoms, or other areas that are to be protected with riprap shall be
free of brush, trees, stumps, and other objectionable material and be graded to a
smooth compacted surface. The CONTRACTOR shall excavate areas to receive
Bobcat Ridge Access Road 02375-3 Riprap
Improvements
June 2006
3.02
riprap to the subgrade for granular bedding. The subgrade for bedding materials shall
be stable. If unsuitable materials are encountered, they shall be removed and
replaced as Muck Excavation in accordance with Section 02315 of the Specifications.
Unsuitable materials shall be disposed of from the site by the CONTRACTOR at his
expense. After an acceptable subgrade for granular bedding material is established,
the bedding shall be immediately placed and leveled to the subgrade elevation.
Immediately following this, the riprap shall be placed. If bedding material is
disturbed for any reason, it shall be replaced and graded at the CONTRACTOR's
expense. In -place bedding materials shall not be contaminated with soils, debris or
vegetation before the riprap is placed. If contaminated, the bedding material shall be
removed and replaced at the CONTRACTOR's expense.
PLACEMENT
A. Following acceptable placement of geotextile fabric, granular bedding, riprap
placement shall continence as follows:
1. Machine Placed Riprap: Riprap shall be placed on the prepared slope or
channel bottom areas in a manner which will produce a reasonably well -
graded mass of stone with the minimum practicable percentage of voids.
Riprap shall be machine placed, unless otherwise stipulated in the Drawings
or Specifications.
When riprap is placed on slopes, placement shall commence at the bottom of
the slopes working up the slope. Place the riprap in a stepped fashion with
the bottom of the uphill riprap below the top of the downhill riprap by half of
the height of the riprap minimum.
The entire mass of riprap shall be placed on either channel slopes or bottoms
so as to be in conformance with the required gradation mixtures and to lines,
grades, and thickness shown on the Drawings. Riprap shall be placed to its
full course thickness at one operation and in such a manner as to avoid
displacing the underlying bedding material. Placing of riprap in layers, or by
dumping into chutes, or by similar methods shall not be permitted.
All material going into riprap protection for channel slopes or bottoms shall
be so placed and distributed that there will be no large accumulations of
either the larger or smaller sizes of stone. Some hand placement may be
required to achieve this distribution.
It is the intent of these Specifications to produce a fairly compact riprap
protection in which all sizes of material are placed in their proper
proportions. Unless otherwise authorized by the ENGINEER, the riprap
protection shall be placed in conjunction with the construction of
embankments or channel bottoms with only sufficient delay in construction
of the riprap protection, as may be necessary, to allow for proper
construction of the portion of the embankment and channel bottom which is
to be protected. The CONTRACTOR shall maintain the riprap protection
Bobcat Ridge Access Road 02375-4 Riprap
Improvements
June 2006
until accepted. Any material displaced for any reason shall be replaced to the
lines and grades shown on the Drawings at no additional cost to the
OWNER. If the bedding materials are removed or disturbed, such material
shall be replaced prior to replacing the displaced riprap.
2. Hand Placed Riprap: Hand placed riprap shall be performed during machine
placement of riprap and shall conform to all the requirements of Section
02375 PART 2 above. Hand placed riprap shall also be required when the
depth of riprap is less than 2 times the nominal stone size, or when required
by the Drawings or Specifications.
After the riprap has been placed, hand placing or rearranging of individual
stones by mechanical equipment shall be required to the extent necessary to
secure a flat uniform surface and the specified depth of riprap, to the lines
and grades as shown on the Drawings.
3. Soil Replacement In and Over Riprap: Where riprap is designated to be
buried, place onsite excavated material that is free from trash and organic
matter in riprap voids by washing and rodding. Prevent excessive washing of
material into stream. When voids are filled and the surface accepted by the
ENGINEER, place a nominal 6 inches of soil over the area, or as designated
on the Drawings. Fine grade, seed, and mulch per the Specifications.
4. Rejection of Work and Materials: The ENGINEER shall reject placed riprap
which does not conform to this Section and the CONTRACTOR shall
immediately remove and relay the riprap to conform with said sections.
Riprap shall be rejected, which is either delivered to the job site or placed,
that does not conform to this Section. Rejected riprap shall be removed from
the project site by the CONTRACTOR and at his expense.
5. Geotextile fabric shall be installed according to the manufacturer's
specifications. Material proposed for use shall be submitted and approved by
the ENGINEER prior to installation.
END OF SECTION
Bobcat Ridge Access Road 02375-5 Riprap
Improvements
June 2006
THIS PAGE INTENTIONALLY BLANK,
Bobcat Ridge Access Road 02375-6 Ripmp
Improvements
June 2006
SECTION 02613
PRE -CAST REINFORCED CONCRETE BOX CULVERT
PART1 GENERAL
1.01 DESCRIPTION
A. This section covers pre -cast reinforced concrete box culverts (RCBC).
1.02 SUBMITTALS
A. Submit Shop Drawings including special deflections and angles required for the
project.
PART PRODUCTS
2.01 MATERIAL
A. Reinforced concrete box culverts shall be "wet cast' pre -cast, and shall conform to
ASTM C789. Dry casting of box culverts on this project will not be allowed.
B. Angles or deflections in the culvert shall be specially manufactured by the pre -cast
manufacturer and shall not be special cast in the field.
C. Qualification of Manufacturers: All pre -cast reinforced concrete box culvert shall be
manufactured in an ACPA Q-Cast certified plant.
PART 3 EXECUTION
3.01 INSPECTION
A. Examine upon delivery and do not use individual sections with any defect, including
the following:
1. Fractures or cracks passing through the wall.
2. Defects that indicate imperfect proportioning, mixing, and molding.
3. Surface defects indicating honeycombed or open texture.
4. Damaged or cracked ends where such damage would prevent making a
satisfactory joint.
5. Continuous cracks having a surface width of 0.01 inch or more extending for a
length of 12 inches or more regardless of position in the pipe wall.
B. Mark rejected items and remove from the site.
3.02 INSTALLATION
A. Lay true to line and grade.
B. As each length of pipe is placed in the trench, complete the joint and adjust to the
correct line and grade. Make adjustments by scraping away or filling bedding under
Bobcat Ridge Access Road 02613-1 Pre -Cast Reinforced
Improvements Concrete Box Culvert
June 2006
the body and not by wedging or blocking.
C. Lay upgrade from the lowest point, with the bell end pointing upgrade.
3.03 JOINTING
A. Join in accordance with pipe manufacturer's recommendations.
END OF SECTION
Bobcat Ridge Access Road 02613-2 Pre -Cast Reinforced
Improvements Concrete Box Culvert
June 2006
SECTION 02615
DUCTILE IRON PIPE
PART1 GENERAL
1.01 DESCRIPTION
A. This section covers ductile iron pipe and fittings for water line replacement.
B. Pipe shall be furnished complete with all fittings, flanges, specials and other
accessories.
1.02 QUALITY ASSURANCE
A. Manufacturer
1. All ductile iron pipe shall be supplied by one manufacturer.
1.03 SUBMITTALS
A. Certification: Submit manufacturer's certification that products meet the referenced
standards.
B. Shop DRAWINGS
1. Submit complete Shop Drawings, reference Section 01340, Shop Drawings,
and Operation and Maintenance Manuals. Submit complete layout Drawings
and details of connections for all piping installed within the limits of
structures.
1.04 PRODUCT DELIVERY
A. Handling.
1. Use slings, pipe tongs or skids.
2. Do not drop pipe or fittings including dropping on cushions.
3. Do not skid or roll pipe into pipe already on the ground.
4. Do not damage coating or lining.
5. Do not use hooks.
6. Pipe shall not be handled in any manner which will cause damage.
B. Storage.
1. Store and use lubricants in a manner which will avoid contamination.
2. Store rubber gaskets in a cool, dark location away from grease, oil, and ozone
producing electric motors.
3. Do not exceed maximum stacking heights listed in AWWA C600, Tables 1
and 2.
Bobcat Ridge Access Road 02615-1 Ductile Iron Pipe
Improvements
June 2006