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HomeMy WebLinkAboutAddenda - BID - 5361 HOWES STREET OUTALL PHASE 1 AND 2BID ADDENDUM NO. 1 MAY 5, 1999 Owner City of Fort Collins Water Utility Department 700 Wood Street Fort Collins, CO 80525 970-224-6106 Bid No 5361 Project Name Howes Street Outfall - Phase I and II NOTICE TO ALL KNOWN PLAN HOLDERS AND BIDDERS The OWNER issues this addendum to all known individuals, firms, or corporations who have obtained or received Drawings and Contract Documents for the above referenced project THIS ADDENDUM SHALL BE MADE A PART OF THE CONTRACT DRAWINGS AND CONTRACT DOCUMENTS. BIDDERS SHALL ACKNOWLEDGE RECEIPT OF THIS ADDENDUM IN THE APPROPRIATE SPACE PROVIDED ON THE BID FORM. FAILURE TO ACKNOWLEDGE RECEIPT OF AN ADDENDUM MAY BE CAUSE FOR REJECTION OF THE BID. ALL OTHER TERMS AND CONDITIONS OF THE CONTRACT DOCUMENTS REMAIN UNCHANGED. THIS ADDENDUM CONTAINS PAGES. Bid Addendum No. 1 is as follows: A The bid opening date and time is changed to May 13, 1999, at 2 00 p in Location remains the 'same B Division I — General Requirements Revisions C Division II Site Work Revisions D Drawing Revisions E List of Attendees to Pre -Bid Conference F Geotechnical Report for the Project G List of Plan Holders A synopsis of the Pre -bid Conference and Meeting Agenda is attached to this addendum for informational purposes These items are not considered a part of Bid Addendum Number 1 Page I of Bid Addendum No I l�J will have to coordinate with the City's water utility for lowering a 6-inch Cherry street shall coordinate with City's Parks Department when working in Martinez Park Staging area may be available on the east side of the bike path adjacent to Martinez Park d Protection of trees and vegetation are important (01715) e The Traffic (Control and Erosion Control Plans are included for bidding purposes Contractor will have to submit his own plans for approval 11 Review of construction drawings 12 Questions 13 Site visit (Park in area east of path, north of Cherry Street) Page 5 of Pre -bid Conference Synopsis SECTION 02770 CURB AND GUTTER, AND MISCELLANEOUS CONCRETE PART 1 101 SECTION INCLUDES A Concrete work shall consist of air entrained Portland Cement concrete constructed on a prepared subgrade in accordance with these Specifications The completed work shall conform to the thicknesses and typical cross -sections shown on the Drawings The completed work shall conform to the Imes and grades shown on the Drawings or to those established by the ENGINEER at the Job site 102 RELATED SECTIONS A Section 02240 — Water Control and Dewatering B Section 02315 — Excavation and Embankment C I Section 02320 —Trench Excavation and Backfill 103 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, including a mix design for concrete 104 PROJECT REQUIREMENTS The CONTRACTOR shall submit batch tickets for each load of concrete Tickets shall show iweight of all materials and additives used in each batch PART 2 PI ODUCTS 2 01 MATERIALS A Concrete shall conform to the following requirements 28-Day Field Compressive Strength 3500 psi Cement/Fly Ash 600 Ibs /cu yd Max Water/Cement Ratio 053 Air Content % Range 5-8 Maximum Slump 4" Fine Aggregate (max % of total Aggregate) 50% This material shall consist of a mixture of coarse and fine aggregates, Portland cement, water and other materials or admixtures as required The type of cement shall be Type 1, 11, or UII unless sulfate conditions dictate otherwise If sulfate conditions exist, Type V cement shall be used Howes Street Outfall 02770-1 Sidewalk, Curb and Gutter, Phase I I and Miscellaneous Concrete 4-05-99 n B Concrete The grading concrete shall COARSE composition requirements for coarse and fine aggregates for arm to the following tables FOR PORTLAND CEMENT CONCRETE Sieve�Size or %Passing or Test Procedure Test Requirement 1 Inch 100 '/. Inch 90-100 '/s Inch 20-55 No 4I 0-10 No 8 0-5 % Wear 45, Max Clay Lumps * Friable Particles, % 2 0, Max Coal & Lignites, % 0 5, Max Sodium Sulfate Soundness % 12, Max or FOR PORTLAND CEMENT CONCRETE Percent Passing or Test Requirement % Inch No 41 100 95 -100 No 16 45-80 No 50 10 - 30 No 160 2 - 10 No 260 3, Max Fnable Particles, % 10, Max Coal & Lignite, % 10, Max Deleterious Material (AASHTO T 112)% 3, Max Sand Equivalent (AASHTO T 176),% 80, Min Fmeness Modules 2 50 - 3 50 Sodmm Sulfate Soundness, % 20 0, Max C Coarse Aggregate for Concrete Coarse aggregates shall conform to the requirements of AASHTO M 80, except that the percentage of wear shall not exceed 45 when tested in accordance with AASHTO T 96 Coarse aggregate shall conform to the gradmg in above table D Fine Fine aggrega requirements conform to I for Concrete shall meet Colorado Department of Highways Section 703 01 I gradation as shown above Fine aggregate for concrete shall requirements of AASHTO M 6 The amount of deleterious Howes Street Outfall 02770-2 Sidewalk, Curb and Gutter, Phase I and Miscellaneous Concrete 4-05-99 substances removable by elutriation shall not exceed 3% by dry weight of fine aggregate when tested in accordance with AASHTO T 11, unless otherwise specified The minimum Sand Equivalent, as tested in accordance with AASHTO T 176 shall be 80, unless otherwise specified The Fineness Modules shall not be less than 2 50 nor greater than 3 50, unless otherwise approved E Fly Ash and Water Upon approval based on a satisfactory trail mix, the CONTRACTOR shall have the option of substituting approved fly ash for portland cement, up to a maximum of 20 percent by weight The total weight of cement and fly ash shall not be less than the specified mix design 1 Fly ash for concrete shall conform to the requirements of ASTM C 618, Class C or Class F All chemical requirements of ASTM C 618 Table I -A shall apply with the exception of footnote A Class C fly ash will not be permitted where sulfate resistant cement is required The CONTRACTOR shall submit certified laboratory test results for the fly ash Test results that do not meet the physical and chemical requirements may result in the suspension of the use of fly ash until the corrections necessary have been taken to insure that the material meets the specifications 2 Water used in mixing or curing shall be clean and free of oil, salt, acid, alkali, sugar, vegetable, or other substance injurious to the finished product Water will be tested in accordance with, and shall meet the suggested requirements of AASHTO T 26 Water known to be of potable quality may be used without test Where the source of water is relatively shallow, the intake shall be so enclosed as to exclude silt, mud, grass, or other foreign materials F I Concrete Curing Materials and Admixtures 1 Curing Materials Curing Materials shall conform to the following requirements as specified Burlap Cloth made from Jute or Kenaf AASHTO M 182 Liquid Membrane -Forming Compounds Cunng Concrete AASHTO M Sheet Materials for Curing Concrete AASHTO M 171 Straw shall not be used for curing unless approved by the ENGINEER 2 Air -Entraining Admixture Air -entraining admixtures shall conform to the requirements of AASI4TO M 154 Admixtures which have been frozen will be rejected No chloride containing additives shall be permitted Howes Street�Outfall 02770-3 Sidewalk, Curb and Gutter, Phase I and Miscellaneous Concrete 4-05-99 C> Chemical Admixtures Chemical admixtures for concrete shall conform to the requirements of AASHTO M 194 Admixtures which have been frozen will lie rejected Joint'Fillers The joint fillers shall meet the requirements of one or more of the references listed in paragraph 103 PART EXECUTION 301 SUBGRADE PREP A The subgrade shall be excavated or filled to the required grades and Imes All soft, yielding, or otherwise unsuitable material shall be removed and replaced with suitable material with the ENGINEER's approval Filled sections shall be compacted and compaction shall extend a minimum of six inches outside the form Imes The moisture' content of the subgrade shall be brought within +/- 2% of optimum moisture content and compacted to 95% of the maximum standard Proctor density (ASTM D698) for subgrade materials classified as A-4 through A-7 or 95% of modified proctor density for materials classified as A-1 through A-3 302 CONCRETE A Concrete transported in truck mixers or truck agitators shall be delivered to the site of the work and completely discharged within a period of ninety (90) minutes after the cement comes in contact with the mixing water or with the combined aggregates containing free moisture in excess of 2% by weight The concrete shall be placed either by an approved slip form/extrusion machine, by the formed method, or by a combination of these methods The subgrade shall be conditioned to provide a umformly moist surface when concrete is placed 3 03 MACHINE A The slip form/extrusion machine shall be so designed to place, spread, consolidate, screed, and finish the concrete in one complete pass in such a manner that a mimmum of hand finishing will be necessary to provide a dense and homogenous concrete section The machine shall shape, vibrate, and/or extrude the concrete for the full width and depth of the concrete section being placed It shall be operated with as nearly a continuous forward movement as possible All operations of mixing, delivery, and spreading concrete shall be so coordinated as to provide uniform progress, with stopping and starting of the machine held to a munmum 304 FORMED A The vertical face of previously sawed and adjacent asphalt pavement may NOT be used as a forming surface The CONTRACTOR shall use forms on front and back of all curb and gutter, sidewalks and crosspans The forms shall be of metal or other suitable material that is straight and free from warp, having sufficient strength to resist the pressure of the concrete without Howes Street Outfall 02770-4 Sidewalk, Curb and Gutter, Phase I and Miscellaneous Concrete 4-05-99 u 305 n 306 displacement and sufficient tightness to prevent the leakage of mortar Flexible or rigid forms of proper curvature may be used for curves having a radius of 100 feet or less , Division plates shall be metal Where directed by the ENGINEER the CONTRACTOR shall use a thin metal back form to preserve landscaping, sprinklers, etc Form must be straight and rigid and must be approved by the ENGINEER prior to use on project The front and back forms shall extend for the full depth of the concrete All of the forms shall be braced and staked so that they remain in both horizontal and vertical alignment until their removal No wooden stakes will be allowed They shall be cleaned and coated with an approved form -release agent before concrete is placed against them The concrete shall be deposited into the forms without segregation and then it shall be tamped and spaded or mechanically vibrated for thorough consolidation Low roll or mountable curbs may be formed without the use of a face form by using a straight edge and template to form the curb face When used, face forms shall be removed as soon as possible to permit firuslung Front and back forms shall be removed without damage to the concrete after it has set Should the removal of adjacent asphalt pavement be required beyond that shown in the asphalt patch detail to properly correct failed concrete sections, the CONTRACTOR shall remove and replace said asphalt pavement to such an extent as to provide a smooth repair The ENGINEER shall be notified prior to commencing any additional asphalt removal The plastic concrete shall be finished smooth by means of a wood float and then it shall be grveri final surface texture using a light broom or burlap drag Concrete that is adjacent to forms and formed joints shall be edged with a suitable edging tool to the dimensions shown on the Drawings A Contraction Joints Transverse weakened -plane contraction Joints shall be constructed at right angles to the curb line at intervals not exceeding 10 feet for curb and gutter or 5 feet for sidewalk Joint depth shall average at least one-fourth of the cross-section of the concrete Contraction joints may be sawed, hand -formed, or made by 1/8 inch thick division plates in the form work Sawing shall be done early after the concrete has set to prevent the formation of uncontrolled cracking The joints may be hand -formed either by (1) using a narrow or triangular jointing tool or a thin metal blade to impress a plane of weakness into the plastic concrete, or (2) inserting 1/8 inch thick steel strips into the plastic concrete temporarily Steel strips shall be withdrawn before final finishing of the concrete Where division plates are used to make contraction joints, the plates shall be removed after the concrete has set and while the forms are still in place B Expansion Joints Expansion joints shall be constructed at right angles to the curb line at immovable structures and at points of curvature for short radius curves Filler material for expansion joints shall conform to requirements of one or more of Howes Street Outfall 02770-5 Sidewalk, Curb and Gutter, Phase I and Miscellaneous Concrete 4-05-99 913. the references defined in Section 103 and shall thick piece foi the full depth and width of the joint be furnished in a single 1/2 inch Expansion joints in a slip formed curb or curb -and -gutter shall be constructed with an appropnate hand tool by raking or sawing through partially set concrete for the full depth and width of the section The cut shall be only wide enough to permit a snug fit for ttie joint filler After the filler is placed, open areas adjacent to the filler shall be filled with concrete and then troweled and edged The CONTRACTOR may choose to place the filler and pour the concrete around it Alternately, an expansion joint may be installed by removing a short section of freshly extruded curb -and -gutter immediately, installing temporary holding forms, placing the expansion joint filler, and replacing and reconsolidating the concrete that was removed Contaminated concrete shall be discarded Construction joints maybe either butt or expansion -type joints Curbs or combined curbs and gutters constructed adjacent to existing concrete shall have the same type of joints as in'the existing concrete, with similar spacing, however, contraction joint spacing shall !not exceed 10 feet 3 07 PROTECTION A The CONTRACTOR shall always have materials available to protect the surface of the plastic concrete against ram These materials shall consist of waterproof paper or plastic sheeting For slip form construction, materials such as wood planks or forms to protect the edges shall also be required Concrete damaged by ram shall be required to be removed and replaced at the CONTRACTOR's expense Concrete being placed in cold weather during which the temperature may be expected to drop below 35 degrees F , shall be suitably protected to keep the concrete from freezing until it is at least 10 days old Concrete injured by frost action shall be required to be removed and replaced at the CONTRACTOR's expense The CONTRACTOR will be responsible for correcting any vandalism or defacement (graffiti) that occurs on the concrete prior to final acceptance 308 CURING A Concrete moisture, white liquid curing mate when the c completion i 3 09 BACKFILLING Howes Street Outfall Phase 4-05-99 be cured for at least 7 days after placement to protect against loss of I temperature change, and mechanical injury prior to any overlay or work Moist burlap, waterproof paper, white polyethylene sheeting, iembrane compound, or a combination thereof may be used as the l Membrane curing shall not be permitted in frost -affected areas crete will be exposed to deicing chemicals within 30 days after the curing period 02770-6 Sidewalk, Curb and Gutter, and Miscellaneous Concrete Ern. A The spaces in front and back of curbs shall be refilled with suitable material to the required elevations after the concrete has set sufficiently The fill material shall be thoroughly tamped in layers 310 SEALING A Where required, concrete shall be sealed with a mixture of 1/2 linseed oil and 1/2 diesel fuel, unless otherwise specified by ENGINEER 311 TOLERANCE A Forms shall not deviate from true line by more than %.-mch at any point B Mixed concrete shall be not less than 50`F, nor more than 80OF at the time of placing it in forms unless otherwise directed C If air temperature is 35°F or less at the time of placing, the ENGINEER will require water and/or aggregate heated to not less than 70T or more than 150°F D Finished joints shall not deviate more than %.-inch in the horizontal alignment from a straight line E Any localized humps and or depressions greater than %.-mch will require removal and replacement of the work in question F No ponding of water greater than 3/8-mch shall be allowed G Combination curb, gutter and walk and/or vertical curb and gutter flowline depth shall not vary from adopted standards by more than +1/2-mch, measured vertically from the top of curb to the gutter invert H Pedestrian walks shall have a minimum of 2 0% and a maximum of 2 5% slope toward the roadway I Contraction and construction joints shall be placed at the standard spacing of 10 feet in curb, gutter, sidewalks, crosspans, trickle channel, etc A minimum spacmg of 5 feet will be allowed for repairs 1 Heave or settlement of sidewalk, relative to separate curb pour, greater than %:-mch shall be cause for corrective action This provision shall not apply to transverse sidewalk joints K At the time of final acceptance inspection, the repair of all cracks will be completed Cracks that are less than V4-mch wide, exhibit no horizontal or vertical shifting, and do not meet the conditions in 2, 3, and 4 below may, at the Howes Street Outfall 02770-7 Sidewalk, Curb and Gutter, Phase I and Miscellaneous Concrete 4-05-99 .. k� 4 ; Li, discretion of the OWNER, be 'sealed by iouting approximately %-inch to I- mch deep by %.-mch wide and filling with Sikaflex I -A or equivalent 2 Any crack that extends through a joint shall require: removal and replacement of the entire cracked area 3 Any longitudinal cracked section of concrete will require complete removal and replacement of that section between joints 4 Repair action for hairline cracks as determined in 1 above may be waived at the discretion of the OWNER For the purpose of this section, a hairline crack is one that is reasonably immeasurable and without separation as determined by the ENGINEER 3 12 QUALITY CONTROL A Concrete testing and testing laboratory services required shall conform to the following unless otherwise determined by the ENGINEER Procedures Project Acceptance Test Project Section T3Te of Test Frequeno_y Sampling Testing GRADATION Sidewalks 1/1000 sq yds CP 30 CP 31 or fraction thereof for SIDEWALKS each size aggregate of (CONCRETE) concrete placed CURBING Curbin 1/2000 lineal feet or (CONCRETE) fraction thereof for each size aggregate of concrete placed MOISTURE 1 per day and as often CP 30 CP 60 CONTENT as needed for quality (FINE AGGREGATE) control MOISTURE I per day min where CP 30 CP 60 CONTENT moisture content is greater (COARSE than+0 5%from SSD condition AGGREGATE) SLUMP The slump, air content and T 141 T 119 unit weight tests shall be tamed out on the first truck of concrete for the daily placement and there- after in conformance with the following table AIR CONTENT I set of tests for every T 141 T 152 Howes Street Outfall 02770-8 Sidewalk, Curb and Gutter, Phase I and Miscellaneous Concrete 4-05-99 1000 square yards or fiachon T 199 thereof of concrete placed YIELD AND 4 tests for every 2000 T 141 CEMENT lineal feet or fraction thereof or nomograph of curb and gutter graph placed COMPRESSIVE Sidewalks 1 set (4) of T 141 cylinders per 1000 square yards or fraction thereof or concrete placed per day Curbing I set (4) of cylinders per 2000 lineal feet or fraction thereof of concrete placed per day Point of Acceptance Gradation -Stockpile, belt, or bin Air Content - Mixer Discharge T 121 T 22 T 23 Prior to backfilhng and after forms are removed, honeycombed, defective or damaged areas of concrete shall be repaired Repairs shall be made within 7 days after the forms are removed 313 CLEAN-UP A The surface of the concrete shall be thoroughly cleaned upon completion of the work and prior to the substantial completion walk through, and the site left in a neat and orderly condition END OF SECTION Howes Street Outfall 02770-9 Sidewalk, Curb and Gutter, Phase I and Miscellaneous Concrete 4-05-99 B. DIVISION I - GENERAL REQUIREMENTS REVISIONS Section 01270 — Measurement and Payment 1 Mobilization Revise the second sentence in the first paragraph from "fencing around project work areas" to "fencing around project work areas and staging area " 6 Removal of Structures and Obstructions Add the following to the last sentence in the second paragraph "Removal and disposal of path, removal and disposal of concrete headwall at outfall of existing 48-inch pipe at Cache La Poudre River," 23 Concrete Headwall and Wmgwalls at Double 10'x4' Culvert Add the following to the second sentence in the second paragraph "furnishing and installing trash rack" Section 01580 — Project Signs 301 Requirements B Delete the sentence "The sign shall be paid for separately as indicated in the Bid Schedule " Page 2 ofBid Addendum No / THIS PAGE INTENTIONALLY LEFP BLANK Howes Street Outfall 02770-10 Sidewalk, Curb and Gutter, Phase I and Miscellaneous Concrete 4-05-99 4, SECTION 02740 FLEXIBLE PAVEMENT PART1 GENERAL 101 SECTION INCLUDES A This section covers paving of all new and existing asphalt surfaces Existing pavement is to be replaced with similar material as herein set forth 102 RELATED SECTIONS A Section 02315 — Trenching, Bedding, and Backfillmg 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 Cationic Emulsified Asphalt The cationic emulsified asphalt for the tack coat shall be CSS-lh and shall meet the requirements of AASHTO M 208 (ASTM C 2397) B Asphaltic Concrete Surface Course Description — The asphaltic concrete surface shall consist of a mineral aggregate, uniformly mixed with asphalt cement The mineral aggregate shall be 100% crushed gravel Materials Crushed Gravel The crushed gi avel shall consist of clean, hard, durable particles which have been crushed to the following gradations (In accordance with the City of Fort Collins Design and Construction Standards for Street and Public Right-of-way) Howes Street Outfall 02740-1 Flexible Pavement Phase I & II 4-05-99 TABLE I MATERIAL SPECIFICATIOS FOR HOT BITUMINOUS PAVEMENT Sfeve Size or Test Procedure Percent Passmg or Test Requirement i Mix C Mix CX Mix 1 '/z" 100 1" 90-100 100 3/a" 63-85 90-100 100 /2" 46-78 70-89 90-100 1/8" 60-88 74-89 #4 22-54 44-72 50-78 48 13-47 30-62 32-64 #30 4-26 12-38 12-38 #200 1-7 3-7 3-7 % Wear, AASHTO T-86 45, Max 45, Max 45, Max Two or more Fractured Faces on +4 50, Min 50, Min 50, Min Tensile Strength Ratio 75, Min 75, Min 75, Min ASTM D-4867 Lottman Test Plasticity Index 6, Max 6, Max 6, Max b Aggregates shall not contain clay balls, organic matter, or other deleterious substances c An additive may be used to meet the requirement for Index of Retained Strength, if necessary Such additives may be hydrated lime, Type I Portland Cement, or anti - stripping agents approved by the Colorado Department of Transportation d The asphalt cement used shall be Grade AC-10 unless otherwise directed by the City of Fort Collins Engineering Department The crushed gravel shall show no detrimental amount of stripping when tested as follows A test sample consisting of the aggregate and bitumen to be used in the paving mixture shall be mixed at the temperature specified herein The sample shall then be spread in a loose, thin layer and allowed to air - season for 24 hours before testing A portion of the sample, not over %z of the capacity of the jar, shall be placed in a glass jar and completely covered with distilled water The jar shall be fitted with a tight screw cap and allowed to stand for a period of 24 hours The jar shall be vigorously shaken for a period of 15 minutes and the sample of the mixture shall then be examined for stripping If stripping occurs, the aggregate shall be rejected or an approved method of treating shall be Howes Street Outfall 02740-2 Flexible Pavement Phase I & II 4-05-99 specified to change the material from a hydrophilic to a hydrophobic state as directed by the ENGINEER Asphalt Cement The asphalt cement shall be uniform in character, free from water, and shall not foam when heated to 347F It shall meet the following requirements for penetration Minimum R Value 95 The viscosity graded asphalt shall be homogeneous, free from water, and shall not foam when heated to 347F (175C) The viscosity graded asphalt cement shall conform to all of the, following requirements of the Standard Specifications for Viscosity Graded Asphalt Cement AASHTO Designation M226 and modifications thereto Asphalt cement shall be AC-10 unless otherwise approved by ENGINGEER GRADE AC-10 TEST AC-10 Viscosity, 140F (60C), Poises 1000 +/- 200 Viscosity, 275F (135C), Cs-mmimum 150 Penetration, 77F (25C), 100g, 5-sec min 70 Flash Point, COC, F (C) -minimum 425 (219) Solubility in Tnchlorethylene, %-mmimum 990 TESTS ON RESIDUE FROM THIN-FILM OVEN TEST Viscosity, 140F (60C), Poises -minimum 4000 Ductility, 77F (25C), 5 cm per minute cm-mimmum 50 SPOT TEST Standard Naphtha Solvent Negative Naphtha-Xylene Solvent Negative An AASHTO T 179 (Thm-Film Oven Test) may be used, but AASHTO T240 shall be the referee method Howes Street Outfall 02740-3 Flexible Pavement Phase I & II 4-05-99 f u El 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 " 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 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 Screens Plant screens, capable of screening all aggregates to the size required for proportioning, and having normal 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 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 Thermometric Equipment An armored thermometer reading from 200F to 500F 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 Dust Collectors When plants are located in any vicinitywhere 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 Howes Street Outfall 02740-4 Flexible Pavement Phase I&II 4-05-99 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 `/2 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 Control of Mixing Time The plant shall be equipped with an approved means to govern the time of mixing and to maintain it 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 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 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 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 nue 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 Howes Street Outfall 02740-5 Flexible Pavement Phase I & II 4-05-99 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 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 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 = PuQmill 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 325F The penetration of thc 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 Howes Street Outfall 02740-6 Flexible Pavement Phase I & II 4-05-99 low a temperature as is consistent with proper mixing and laying, and in no case to exceed 350F 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 Mature 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 mature, in which all particles of the mineral aggregates are coated uniformly The constituents of the surface course shall be combined in such proportions to produce a mixture conforming to the following gradations Sieve Size or Teat Procedure Percent Passing or Teat Requirement G Mix C Mix CX Mix 100 1,, 90-100 100 V 63-85 90-100 100 %" 46-78 70-89 90-100 '/8" 60-88 74-89 #4 22-54 44-72 50-78 #8 13-47 30-62 32-64 #30 4-26 12-38 12-38 #200 1-7 3-7 3-7 % Wear, AASHTO T-86 45, Max 45, Max 45, Max Two or more Fractured Faces on +4 50, Min 50, Min 50, Min Tensile Strength Ratio 75, Min 75, Min 75, Min ASTM D-4867 Lottman Test Plasticity Index 6, Max 6, Max 6, Max BITUMEN To be determined by job ma formula After the job ma formula is established, all ma furnished for the project shall conform to within the range of tolerances in Table 2 provided below Howes Street Outfall 02740-7 Flexible Pavement Phase I & II 4-05-99 TABLE 2 MIX TOLERANCES Maximum Size +/- 0 Percentage Points Passing No 4 and Larger +/- 8 Percentage Points No 8 to No 30 +/- 6 Percentage Points Passing No 200 +/- 2 Percentage Points Asphalt Content +/- 0 3 Percentage Points RAP > 11%, then +/- 0 4 Percentage Points Discharged Mix Temnerature +/- 20 F Mix tolerances shall conform to within ranges shown on Table 1 The mix design shall be performed using Hveem Procedures as outlined in AAS14TO T-246 or ASTM D1560 Mix design parameters for each of the procedures are shown in Table 3 TABLE 3 MIX DESIGN CRITERIA TEST Hveem AASHTO T 246 Strength S 35 Min VMA, (C Mix) 12, Min VMA, (CX Mix) 13, Min VMA, (G Mix) 11, Min Air Voids, Total Mix, % 3-5 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 al 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 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, and at the locations that are shown on the Plans or as directed by the ENGINEER The prime coat shall be placed by means of an approved pressure Howes Street Outfall 02740-8 Flexible Pavement Phase I & II 4-05-99 distributor Before application, the asphaltic oil shall be heated as directed by the ENGINEER However, it shall not be heated to more than 180F 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 durme 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 only when atmospheric temperatures are above 40F and rising and when no frost exists in the subgrade Any material lard 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 Howes Street Outfall 02740-9 Flexible Pavement Phase I & II 4-05-99 C. DIVISION H - SITE WORK REVISIONS Section 02315 — Excavation and Embankment 302 Excavation and Backfill for Structures Add the following paragraph "Prior to placement of fill over undisturbed on -site soils, the on -site soils shall be scarified to a minimum depth of 8 inches, conditioned to near optimum moisture content (+/- 2%) and compacted to 95%lof the Maximum Standard Proctor Density " Section 02375 — Riprap, Bedding, and Feature Boulders 201 Materials A RipRap In riprap designation table, for Type VH riprap, revise "41" inches to be "42" inches C Feature Boulders Replace the first sentence with the following sentences "Feature Boulders shall meet the same material requirements as riprap unless designated otherwise on the Drawings The shape of the boulders shall be as designated on the drawings " Section 02740 — Flexible Pavement "Delete entire section and replace with the attached section " Section 02770 — Sidewalk, Curb and Gutter and Miscellaneous Concrete "Delete entire section and replace with the attached section " Page 3 ofBid Addendum No I 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 %:" 50OF 550F 2-3" 30OF 40OF Over 2 V2" 40OF 450F 3 '/.-4" 250F 30OF Over4" 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 2950-132 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 Imes within the use of stationary side fors The pavers shall be capable of spreading the mixtures, without segregation, in thickness of from %x 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 Howes Street Outfall 02740-10 Flexible Pavement Phase I & II 4-05-99 When asphalt concrete pavement thickness in excess of 2 inches is called for, they shall be laid in separate courses of not less than I inch or more than 2 inches or as directed by the Engineer The term "screed" includes a "stnke-off' 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 earned 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 '!z 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 I 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 Howes Street Outfall 02740-I 1 Flexible Pavement Phase I & II 4-05-99 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 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, weighting 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 % 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 occumng 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 and no further compression is possible To prevent adhesion of the mixture to the roller, the wheels shall be kept properly moistened, but excess water or oil 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 %4 inch from the Howes Street Outfall 02740-12 Flexible Pavement Phase I & II 4-05-99 0 thickness shown on the typical cross-section in the Plans 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 V4-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 90% 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 3 04 TEMPORARY ASPHALT COLD -PATCH In the event the CONTRACTOR cannot install hot bituminous pavement, for whatever reason, pursuant to the requirements of these documents, he shall install a temporary asphalt cold -patch pursuant to said requirement and subsequently remove said cold -patch and replace with hot bituminous pavement at the earliest possible date A Place suitably prepared base course B Minimum thickness 2 inches on 6-1/2 inches of aggregate base course C The CONTRACTOR is responsible for maintaining cold -patch 3 05 MANHOLE FRAMES AND VALVE BOXES A Manhole frames and water valve vaults can be completed after paving operation by using "plates " 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 W) Valve boxes shall be inspected by placing a valve key on the operating nut to assure a proper alignment END OF SECTION Howes Street Outfall 02740-13 Flexible Pavement Phase I & II 4-05-99 THIS PAGE INTENTIONALLY LEFT BLANK. Howes Street Outfall 02740-14 Flexible Pavement Phase I & II 4-05-99 P. 02 TRANSACTION REPORT MAY-04-99 TUE 06:10 PM BROADCAST Administrative Services Purchasing Division City of Fort Collins ADDENDUM No. 2 May 4, 1999 SPECIFICATIONS AND CONTRACT DOCUMENTS Description of Bid #5361 — Howes Street Outfall — Phase I and II NEW OPENING DATE:* 2 00 p m. (our clock) MAY 13, 1999 To all prospective bidders under the specifications and contract documents described above: The following pages are lust a part of Addendum No. 2 — the complete P. 01 TRANSACTION REPORT MAY-04-99 TUE 05:18 PM BROADCAST DATE START RECEIVER TX TIME PAGES TYPE NOTE M# DP MAY-04 05:17 PM 913034422231 1'13" 3 SEND ( M) OK 196 TOTAL 1M 13S PAGES: 3 fo P. 01 TRANSACTION REPORT MAY-04-99 TUE 06:06 PM SEND(M) DATE START RECEIVER TX TIME PAGES TYPE NOTE M# DP MAY-04 06:02 PM 95323792 3'56" 10 SEND ( M) OK 198 TOTAL 3M 56S PAGES: 10 .i .n�i rv.,A73c 4 � t .£ i City of Fort Collins B id No Project Name Administrative Services Purchasing Division CITY OF FORT COLLINS BID ADDENDUM NO. 2 MAX 5,1999 5361 Howes Street Outfall - Phase I and U Opening Date 2:00 p in. (our clock) May 5, 1999 NEW OPENING DATE 2 00 p m (our clock) MAY 13, 1999 NOTICE TO ALL KNOWN PLAN HOLDERS AND BIDDERS 'I he OWNER issues this addendum to all known individuals, £inns, or corporations who have obtained or received Drawings and Contract Documents for the above referenced project THIS ADDENDUM SHALL BE MADE A PART OF THE CONTRACT DRAWINGS AND CONTRACT DOCUMENTS. BIDDERS SHALL ACKNOWLEDGE RECEIPT OF THIS ADDENDUM IN THE APPROPRIATE SPACE PROVIDED ON THE BID FORM. FAILURE TO ACKNOWLEDGE RECEIPT OF AN ADDENDUM MAX BE CAUSE FOR REJECTION OF THE BID. ALL OTHER TERMS AND CONDITIONS OF THE CONTRACT DOCUMENTS REMAIN UNCHANGED. THIS ADDENDUM CONTAINS —PAGES. P. 01 TRANSACTION REPORT MAY-04-99 TUE 06:29 PM BROADCAST DATE START RECEIVER TX TIME PAGES TYPE NOTE NO DP MAY-04 06:11 PM BUILDERS EXCHANGE 3'33" 11 SEND ( M) OK 199 06:15 PM CMD 2'43" 11 SEND ( M) OK 199 06:18 PM DAILY JOURNAL 3'50" 11 SEND ( M) OK 199 06:22 PM PLAN ROOM 6'32" 11 SEND ( M) OK 199 TOTAL 16M 38S PAGES: 44 Administrative Services Purchasing Division ADDENDUM No. 2 May 4, 1999 SPECIFICATIONS AND CONTRACT DOCUMENTS Description of Bid #5361 -- Howes Street Outfall — Phase I and II NEW OPENING DATE:: 2.00 p m. (our clock) MAY 13, 1999 To all prospective bidders under the specifications and contract documents described above The following pages are just a part of Addendum No. 2 — the complete P, O1 K TRANSACTION REPORT MAY-04-99 TUE 05:15 PM BROADCAST DATE START RECEIVER TX TIME PAGES TYPE NOTE M# DP MAY-04 05:13 PM 95354561 WWI 0 SEND ( M) BUSY 196 05:14 PM 919707852 913037576 **'**" 0 SEND ( M) BUSY 196 04:39 PM 92233191 2'40" 11 SEND ( M) OK 106 04:42 PM 96631566 4'59" 11 SEND ( M) OK 196 04:47 PM 94079484 3'33" 11 SEND ( M) OK 196 04:51 PM 913036599171 3'34" 11 SEND ( M) OK 196 04:55 PM 913034422231 3'10" 9 SEND ( M) COM E-4 bil 196 (—hN—BUSY 196 05:00 PM 913037911801 2'45" 11 SEND ( M) OK 196 05:15 PM 913036882331 0 SEND ( M) BUSY 196 05:04 PH 913034712099 3156" 11 SEND ( M) OK 196 TOTAL 24M 37S PAGES: 75 Administrative Services Purchasing Division ADDENDUM No. 2 May 4, 1999 SPECIFICATIONS AND CONTRACT DOCUMENTS Description of Bid #5361 — Howes Street Outfall — Phase I and II NEW OPENING DATE:: 2.00 p.m. (our clock) MAY 13. 1999 To all prospective bidders under the specifications and contract documents described above, The following pages are just a part of Addendum No 2 — the complete i D. DRAWING REVISIONS Sheet C-1 General notes for Howes Street Outfall - Phase I and II Add the following note 10 The Contractor shall avoid driving construction vehicles over existing paths for construction of the improvements The Contractor shall be responsible for replacing path's damaged by his construction activities at his expense Page 4 of Bid Addendum No I P. 01 TRANSACTION REPORT MAY-04-90 TUE 06:09 PM BROADCAST DATE START RECEIVER TX TIME PAGES TYPE NOTE M# DP MAY-04 06:08 PM 98789396 W oll 0 SEND ( M) BUSY 197 05:21 PM 913033 F1801 3'32" 11 SEND ( M) OK 197 05:25 PM 919703510192 2'41" 11 SEND ( M) OK 197 05:28 PM 919703565661 3'13" 11 SEND ( M) OK 197 05:32 PM 912568459750 6'38" 11 SEND ( M) OK 197 05:39 PM 914025569420 2'40" 11 SEND ( M) OK 197 05:42 PM 913037911710 2'47" 11 SEND ( M) OK 197 05:45 PM 913032871790 2'40" 11 SEND ( M) OK 197 05:48 PM 913032980275 2'39" 11 SEND ( M) OK 197 05:51 PM 94820278 2'50" it SEND ( M) OK 197 06:09 PM 95354382 0 SEND ( M) BUSY 197 05:56 PM 94828658 4'00" 11 SEND ( M) OK 197 TOTAL 33M 40S PAGES: 110 P. 01 TRANSACTION REPORT MAY-05-99 WED 09:35 AM SEND(M) DATE START RECEIVER TX TIME PAGES TYPE NOTE M# DP MAY-05 09:33 AM 94073900 2'42" 11 SEND ( M) OK 005 TOTAL 2M 42S PAGES: 11 Administrative Services of Port Collins Purchasing Division ADDENDUM No. 2 May 4, 1999 SPECIFICATIONS AND CONTRACT DOCUMENTS Description of Bid #5361 — Howes Street Outfall — Phase I and II NEW OPENING DATE:: 2.00 p.m (our clock) MAY 13, 1999 To all prospective bidders under the specifications and contract documents described above. The following pages are lust a part of Addendum No 2 — the complete TRANSACTION REPORT P,O1 MAY-05-99 WED 08:18 AM BROADCAST DATE START RECEIVER TX TIME PAGES TYPE NOTE M# DP MAY-05 07:55 AM 919705354561 3'34" 11 SEND ( M) OK 000 07:59 AM 913037576946 3'34" 11 SEND ( M) OK 000 7L-08:17 AM 919705323792 0 SEND ( M) BUSY 000 08:04 AM 913034712099 3'56" 11 SEND ( M) OK 000 -<,Q8:18 AM 9878939B **,**" 0 SEND ( M) BUSY 000 08:09 AM 919705354382 3'49" 11 SEND ( M) OK 000 TOTAL 14M 53S PAGES: 44 AAminietrativP .1;ervices _- Purchasing Division ADDENDUM No. 2 May 4, 1999 SPECIFICATIONS AND CONTRACT DOCUMENTS Description of Bid #5361 — Howes Street Outfall — Phase I and II NEW OPENING DATE: 2.00 p.m. (our clock) MAY 13, 1999 To all prospective bidders under the specifications and contract documents described above: The following pages are lust a part of Addendum No 2 — the complete E. LIST OF ATTENDEES TO PRE -BID CONFERENCE "See attached list" F. GEOTECHNICAL REPORT "See attached report" G. LIST OF PLAN HOLDERS "See attached list" Page 5 of Bid Addendum No I PRE -BID CONFERENCE SYNOPSIS AND MEETING AGENDA The following items were discussed and clarified at the Pre -bid Conference but are not a part of this bid addendum The Pre -bid Synopsis and 'Meeting Agenda is provided for informational purposes only 1 ICON Engineering, Inca is the Civil Designer for the project, Bates Engineering, Inc, completed Structural Design, and Jim Sell Design completed Landscaping and Irrigation Design All questions concerning the design shall be directed to Doug Williams at ICON 303-221-0802 Questions regarding the bidding requirement shall be directed to Ms Opal Dick with the City's Purchasing Department , 2 Plans may be picked up at the City's Purchasing Department and are also available for viewing at the Plans Room 3 Bid opening has been changed to May 13, 1999, at 2 00 p in 4 Coordination is very important for project There are several time constraints that will have to be met Contractor will have to schedule his work with others in the project area 5 Contractor shall coordinate with a Public Service for removal of 8-mch high pressure gas line in Cherry Street b City Water Department for relocation of 6-inch waterline in Cherry Street 6 Work in BNRR must be completed in 28 calendar days Work limits are from Station 5+58 to Station 6+10 Contractor shall be aware of insurance requirements for work in railroad nght-of-way 7 BNSF will remove and replace ballast and tracks at no cost to the contractor Any BNSF flag persons required will be,supplied at no cost to the contractor 8 A portion of the duct bank is in the work required for the BNSF Railroad crossing and a portion is outside of it Refer to the stations shown for the work items in the specifications 9 Contractor shall notify City Light and Power 20 days in advance of work in electric duct bank Electric duct bank shall be excavated and supported by the contractor The City will remove concrete around and under the duct bank to approximately 24 inches wide x 30 inches in depth The duct bank consists approximately of 5 - 5" PVC Conduits 2 — 4" PVC Conduits I 2 — 2" PVC Conduits In the conduits are Page / of Pre -bid Conference Synopsis 6 — 750 kcm aluminum cables — 15 kv, 220 and insulation, Jacketed weight 1 77 pounds/foot/cable 1 3 — 1/0 aluminum cI ables — 14 kv, 220 mil insulation, jacketed weight 69 pounds/foot/cable 1 — 350 kcm alumiium tnpex cable — 600 volt, weight 1 19 pounds/foot 2 — 144 fiber, fiber i ptic cables, weight 0 15 pounds/foot/cable 10 Supports for electric du made for approval 11 City Light and Power is the BNSF Railroad and installation Contractor the culvert 12 The 45-day time period outside this area can be traffic 13 Existing asphalt thickne 14 The limits of constructic north to south 15 Coordinate with the Cib bank must be designed by a P E licensed in Colorado Submittals will be planning on adding a new electric duct in the alignment of the box culvert at south through Cherry Street Contractor shall coordinate with City during may have to backfill this line during his backfill operation for construction of for work in Cherry Street covers the time the street can be closed Work ;ompleted at different times, as long as it does not interfere with the street or in Cherry Street is estimated to be 8 inches based on Test Hole No 6 south of Cherry Street are approximately 100 feet east to west and 50 feet Park Department for irrigation construction 16 Concrete mix designs a're minimum requirements Contractor may submit designs that exceed the nummum requirements to aid in his construction techniques and sequencing 17 Contractor shall bid the culvert based on the design presented if contractor wishes to change the method of construction� this will be reviewed after bid is awarded Additionally, construction costs for changes would be the Contractor's responsibility 18 Angle points in box culvert will not be allowed Culvert must be curved as shown on plans 19 Box culvert installation) includes over -excavation of subgrade and replacement with 18 inches of suitable on -site materialland 6 inches of rock bedding Replacement of suitable on -site material with rock at the Contractor's option would be at the Contractor's expense This would have to be accepted by the City 20 The subgrade of box culvert shall be scarified to a depth of 8 inches and re -compacted to 95% of the Maximum Standard Proctor density at 2%+/- optimum moisture content This requirement will be added to the Addendum) 21 Boulders to be used fort, the drop structure and feature boulders shall be rounded river rock These may be available in the Fort Collins area from Pioneer Sand and Hall/Erwin 22 Placement of boulders (shall be random Jim Sell Design will be on -site to help contractor with placement 23 A casing pipe has been stalled on the North Weld County waterline Contractor shall be aware that the culvert will be very close to this line Page 2 of Pre -bid Conference Synopsis 24 A geotechmcal report was completed for the project This is on file with the City and will be included in the Addendum 25 Earthwork quantities dI not include excavation or fill for structures (i e , culvert, riprap, drop structure, etc ) Quantities do include excavation required for the Cherry Street lowering 26 Quantities shall be bid according to the Bid Schedule Final earthwork quantities will be calculated based on the existing and final grades measured for the project 27 The City does not need excess material Contractors shall assume disposal of material off -site at their own location and expense 28 Based on the geotechm lal report, there should be enough suitable on -site material for backfill If this is not the case, then negotiations may be held with the Contractor for providing import material 29 Plans for Erosion Control and Traffic Control must be submitted by the contractor for approval and can be adjusted to facilitate his work Plans shown in the Drawings have been reviewed by the City and should be used as a guide 30 The staging area east of Martinez Park will be available for use by the contractor Construction traders shall be placed in this area Provisions shall be made for safe passage of pedestrians along the path in this area Fencing will be required and will be added to the Addendum 31 To the City's knowledge, no hazardous materials have been encountered in this area based on previous work 32 Removal of the path should be included in Bid Item 6 — Removal of Structures and Obstructions 33 The path will have colored concrete and fiber mesh per the Drawings Sidewalks and driveways will not 34 The City will work with contractor to minimize grading and disturbance in slew area Page 3 of Pre -bid Conference Synopsis HOWES STREET OUTFALL— PHASE I & Q PRE -BID MEETING APRIL 29, 1999, 9:00 AM AGENDA 1 Introductions 2 Project Owner is the City of Fort Collins Water Utility Department 3 ICON Engineering, Inc I is the design engineer and will have a full time inspector on site and will provide construction observation and schedule materials testing for the Owner Bates EngineeringInc and Jim Sell Design will also provide observation for structural & landscaping work items Doug Williams, of ICON, can be contacted at (303) 221-0802 for questions prior to bid opening 4 Bid Opening scheduled for May 13, 1999 at 2 00 pm 5 Bid requirements — comments by City Purchasing Department I 6 A Site visit will be conducted at the end of the meeting for all interested parties 7 The project is being constructed on property owned by the City of Fort Collins and the Burlington Northern Santa Fe Radroad (BNSF) The project limits are Martinez Park on the north, to the south side of Cherry Street onithe south end of the project 8 Contract Time is 120 consecutive calendar days for Phase I work (Substantial Completion) Within this period the following must be completed (refer to 00520 and 01145) a Work in Martinez P U D I b Work in BNSF R-O-W I c Work in Cherry Street 9 Contract time is 45 consecutive calendar days for Phase II work (Substantial Completion) Work for Phase II will commencelon September 15, 1999 (refer to 00520 and 01145) 10 Items to note a Measurement and payment section refers to each item on the bid schedule (01270) b Coordination will be important • Work in) BNSF right-of-way to be coordinated City has/will have pernut Note insurance requirements (00800) and construction requirements (01145) • North Weld County waterline has been encased Contractor shall coordinate with North Weld County when constructing over line • City`s Electncal Department has a major electrical duct bank that crosses the project just north of Cherry Street Specialty requirements are outlined for work in this area (01535)l • Contractor will have to coordinate his work with Public Service for removal of an 8- inch high pressure gas line in Cherry Street Page 4 ofPre-bid Conference Synopsis