HomeMy WebLinkAboutBUCKING HORSE PARK - BDR210011 - DOCUMENT MARKUPS - ROUND 3 - EROSION CONTROL LETTER/REPORTDRAKE ROAD
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SheetBUCKING HORSE PARKThese drawings areinstruments of serviceprovided by NorthernEngineering Services, Inc.and are not to be used forany type of constructionunless signed and sealed bya Professional Engineer inthe employ of NorthernEngineering Services, Inc.NOT FOR CONSTRUCTIONREVIEW SETENGINEERNGIEHTRONRNFORT COLLINS: 301 North Howes Street, Suite 100, 80521GREELEY: 820 8th Street, 80631970.221.4158northernengineering.comof 14
CS1 COVER STEET1
Original Field Survery:
City of Fort Collins
Date: August, 2019
JANUARY 2022 CONTACT INFORMATION
PROJECT TEAM:
VICINITY MAP
NORTH
PROJECT BENCHMARKS:
BUCKING HORSE PARK
PROJECT TEAM:
Cacey Roberts
The Clark Enersen Partners
123 N. College Avenue, Suite 370
Fort Collins, Colorado 80524
(970) 8148-8999
Northern Engineering Services, Inc.
Andy Reese
301 North Howes Street, Suite 100
Fort Collins, Colorado 80521
(970) 221-4158
ARCHITECT
SITE ENGINEER
GEOTECHNICAL ENGINEER
CTL Thompson, Inc.
Spencer Schram, PE
400 N. Link Lane
Fort Collins, Colorado 80524
(970)206-9455
SHEET INDEX
TRACT B, BUCKING HORSE FILING TWO
LOCATED IN SECTION 20, TOWNSHIP 7 NORTH, RANGE 68 WEST OF THE 6TH PRINCIPAL MERIDIAN, CITY OF FORT COLLINS, COUNTY OF LARIMER, STATE OF COLORADO
FIELD SURVEY BY:
City of Fort Collins.
John Steven Von Nieda, PLS
281 N. College
Fort Collins, Colorado 80524
(970) 221-6605
SITE SURVEYOR
1 CS1 COVER SHEET
2 CS2 GENERAL & CONSTRUCTION NOTES
3 EX1 EXISTING CONDITIONS & DEMOLITION PLAN
4 PV1 PAVING PLAN
5 U1 UTILITY PLAN
6 G1 GRADING PLAN
7 G2 DETAILED GRADING PLAN
8-11 D1-D4 CONSTRUCTION DETAILS
12 EC1 EROSION CONTROL PLAN
13 EC2 EROSION CONTROL DETAILS
14 DR1 DRAINAGE EXHIBIT
UTILITY PLANS FOR
UTILITY CONTACT LIST: *
UTILITY COMPANY
* This list is provided as a courtesy reference only. Northern Engineering Services assumes no responsibility for
the accuracy or completeness of this list. In no way shall this list relinquish the Contractor's responsibility for
locating all utilities prior to commencing any construction activity. Please contact the Utility Notification Center of
Colorado (UNCC) at 811 for additional information.
PHONE NUMBER
GAS-----------------Xcel Energy-----------------------------Pat Kreager (970) 225-7840
ELECTRIC--------City of Fort Collins Light & Power--Tyler Sigmund (970) 224-6167
CABLE-------------Comcast----------------------------------Don Kapperman (970) 567-0425
TELECOM.--------CenturyLink-------------------------------(970) 377-6401
WATER------------City of Fort Collins Utilities-----------Matt Simpson (970) 416-2754
WASTEWATER--City of Fort Collins Utilities-----------Matt Simpson (970) 416-2754
STORMWATER-City of Fort Collins Utilities-----------Matt Simpson (970) 416-2754
E N G I N E E R N GI
EHTRON R N
PROJECT
LOCATION City of Fort Collins
Park Planning & Development
Jennifer Torrey
215 North Mason Street
Fort Collins, Colorado 80521
(970) 416-2192
City of
City of
These plans have been reviewed by the City of Fort Collins for concept only. The review does not imply responsibility
by the reviewing department, the City of Fort Collins Engineer, or the City of Fort Collins for accuracy and correctness
of the calculations. Furthermore, the review does not imply that quantities of items on the plans are the final quantities
required. The review shall not be construed for any reason as acceptance of financial responsibility by the City of Fort
Collins for additional quantities of items shown that may be required during the construction phase.
DISCLAIMER STATEMENT:
CTL Thompson, Inc
Geotechnical Investigation Proposed Improvements
Bucking Horse Park
Project No. FCO9343-125
Date: May 8th, 2020
SUBSURFACE EXPLORATION BY:
I hereby affirm that these final
construction plans were prepared
under my direct supervision, in
accordance with all applicable City
of Fort Collins and State of
Colorado standards and statutes,
respectively; and that I am fully
responsible for the accuracy of all
design. revisions, and record
conditions that I have noted on
these plans.
CERTIFICATION STATEMENT:
PLANNER/LANDSCAPE
ARCHITECT
City of Fort Collins
Park Planning & Development
Jennifer Torrey
215 North Mason Street
Fort Collins, Colorado 80521
(970) 416-2192
City of
PROJECT DATUM: NAVD88
CITY OF FORT COLLINS BENCHMARK 2-94 EAST DRAKE AND ENVIRONMENTAL DRIVE, APPROX. 110
FEET EAST OF SOUTH ENTRANCE TO WATER TREATMENT PLANT #2, ON TOP OF THE SECTION
CORNER MONUMENT DATED 1989 IN RANGE BOX, 12 FEET WEST OF TOP OF DITCH BANK, 25 FEET
NORTH OF THE RAILROAD TRACKS, AND 27 FEET SOUTH OF LARGE COTTONWOOD TREE.
ELEVATION = 4881.57
PLEASE NOTE: THIS PLAN SET IS USING NAVD88 FOR A VERTICAL DATUM. SURROUNDING
DEVELOPMENTS HAVE USED NGVD29 UNADJUSTED DATUM (PRIOR CITY OF FORT COLLINS DATUM)
FOR THEIR VERTICAL DATUMS.
IF NGVD29 UNADJUSTED DATUM (PRIOR CITY OF FORT COLLINS DATUM) IS REQUIRED FOR ANY
PURPOSE, THE FOLLOWING EQUATION SHOULD BE USED:
NGVD29 UNADJUSTED DATUM (PRIOR CITY OF FORT COLLINS DATUM) = NAVD88 DATUM - 3.19'
BASIS OF BEARINGS
ASSUMING THE NORTH LINE OF THE NORTHWEST QUARTER OF SECTION 28, TOWNSHIP 7 NORTH,
RANGE 68 WEST, AS BEARING SOUTH 88°42'05" EAST AS SHOWN ON THE PLAT.
OWNER/APPLICANT
CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU
DIG, GRADE, OR EXCAVATE FOR THE MARKING OF
UNDERGROUND MEMBER UTILITIES.
CALL UTILITY NOTIFICATION CENTER OF
COLORADO
Know what'sbelow.
before you dig.Call
R
APPROVED:
City Engineer:Approved Sheets Date
Water & Wastewater Utility Approved Sheets Date
Stormwater Utility Approved Sheets Date
Park Planning and Development Approved Sheets Date
Traffic Operations Approved Sheets Date
Environmental Planner Approved Sheets Date
City of Fort Collins, Colorado
UTILITY PLAN APPROVAL
APPROVED:
APPROVED:
APPROVED:
APPROVED:
APPROVED:
SheetBUCKING HORSE PARKThese drawings areinstruments of serviceprovided by NorthernEngineering Services, Inc.and are not to be used forany type of constructionunless signed and sealed bya Professional Engineer inthe employ of NorthernEngineering Services, Inc.NOT FOR CONSTRUCTIONREVIEW SETENGINEERNGIEHTRONRNFORT COLLINS: 301 North Howes Street, Suite 100, 80521GREELEY: 820 8th Street, 80631970.221.4158northernengineering.comof 14
CS2 GENERAL & CONSTRUCTION NOTES2
A. GENERAL NOTES
1.All materials, workmanship, and construction of public improvements shall meet or exceed the standards and specifications set forth in the Larimer
County Urban Area Street Standards and applicable state and federal regulations. Where there is conflict between these plans and the
specifications, or any applicable standards, the most restrictive standard shall apply. All work shall be inspected and approved by the City of Fort
Collins.
2.All references to any published standards shall refer to the latest revision of said standard, unless specifically stated otherwise.
3.These public improvement construction plans shall be valid for a period of three years from the date of approval by the City of Fort Collins Engineer.
Use of these plans after the expiration date will require a new review and approval process by the City of Fort Collins prior to commencement of
any work shown in these plans.
4.The engineer who has prepared these plans, by execution and/or seal hereof, does hereby affirm responsibility to the City of Fort Collins, as
beneficiary of said engineer's work, for any errors and omissions contained in these plans, and approval of these plans by the City of Fort Collins
Engineer shall not relieve the engineer who has prepared these plans of all such responsibility. Further, to the extent permitted by law, the engineer
hereby agrees to hold harmless and indemnify the City of Fort Collins, and its officers and employees, from and against all liabilities, claims, and
demands which may arise from any errors and omissions contained in these plans.
5.All storm sewer construction, as well as power and other "dry" utility installations, shall conform to the City of Fort Collins standards and
specifications current at the date of approval of the plans by the City of Fort Collins Engineer.
6.The type, size, location and number of all known underground utilities are approximate when shown on the drawings. It shall be the responsibility of
the Developer to verify the existence and location of all underground utilities along the route of the work before commencing new construction. The
Developer shall be responsible for unknown underground utilities.
7.The Developer shall contact the Utility Notification Center of Colorado (UNCC) at 1-800-922-1987, at least 2 working days prior to beginning
excavation or grading, to have all registered utility locations marked. Other unregistered utility entities (i.e. ditch / irrigation company) are to be
located by contacting the respective representative. Utility service laterals are also to be located prior to beginning excavation or grading. It shall be
the responsibility of the Developer to relocate all existing utilities that conflict with the proposed improvements shown on these plans.
8.The Developer shall be responsible for protecting all utilities during construction and for coordinating with the appropriate utility company for any
utility crossings required.
9.If a conflict exists between existing and proposed utilities and/or a design modification is required, the Developer shall coordinate with the engineer
to modify the design. Design modification(s) must be approved by the City of Fort Collins prior to beginning construction.
10.The Developer shall coordinate and cooperate with the City of Fort Collins, and all utility companies involved, to assure that the work is
accomplished in a timely fashion and with a minimum disruption of service. The Developer shall be responsible for contacting, in advance, all
parties affected by any disruption of any utility service as well as the utility companies.
11.No work may commence within any public storm water, sanitary sewer or potable water system until the Developer notifies the utility provider.
Notification shall be a minimum of 2 working days prior to commencement of any work. At the discretion of the water utility provider, a
pre-construction meeting may be required prior to commencement of any work.
12.The Developer shall sequence installation of utilities in such a manner as to minimize potential utility conflicts. In general, storm sewer and sanitary
sewer should be constructed prior to installation of the water lines and dry utilities.
13.The minimum cover over water lines is 4.5 feet and the maximum cover is 5.5 feet unless otherwise noted in the plans and approved by the Water
Utility.
14.A State Construction Dewatering Wastewater Discharge Permit is required if dewatering is required in order to install utilities or if water is
discharged into a storm sewer, channel, irrigation ditch or any waters of the United States.
15.The Developer shall comply with all terms and conditions of the Colorado Permit for Storm Water Discharge (Contact Colorado Department of
Health, Water Quality Control Division, (303) 692-3590), the Storm Water Management Plan, and the Erosion Control Plan.
16.The City of Fort Collins shall not be responsible for the maintenance of storm drainage facilities located on private property. Maintenance of onsite
drainage facilities shall be the responsibility of the property owner(s).
17.Prior to final inspection and acceptance by the City of Fort Collins, certification of the drainage facilities, by a registered engineer, must be
submitted to and approved by the Stormwater Utility Department. Certification shall be submitted to the Stormwater Utility Department at least two
weeks prior to the release of a certificate of occupancy for single family units. For commercial properties, certification shall be submitted to the
Stormwater Utility Department at least two weeks prior to the release of any building permits in excess of those allowed prior to certification per the
Development Agreement.
18.The City of Fort Collins shall not be responsible for any damages or injuries sustained in this Development as a result of groundwater seepage,
whether resulting from groundwater flooding, structural damage or other damage unless such damage or injuries are sustained as a result of the
City of Fort Collins failure to properly maintain its water, wastewater, and/or storm drainage facilities in the development.
19.All recommendations of the Drainage And Erosion Control Report For Bucking Horse Park Dated Jan. 26 2022 by Northern Engineering shall be
followed and implemented.
20.Temporary erosion control during construction shall be provided as shown on the Erosion Control Plan. All erosion control measures shall be
maintained in good repair by the Developer, until such time as the entire disturbed areas is stabilized with hard surface or landscaping.
21.The Developer shall be responsible for insuring that no mud or debris shall be tracked onto the existing public street system. Mud and debris must
be removed within 24 hours by an appropriate mechanical method (i.e. machine broom sweep, light duty front-end loader, etc.) or as approved by
the the City of Fort Collins street inspector.
22.No work may commence within any improved or unimproved public Right-of-Way until a Right-of-Way Permit or Development Construction Permit
is obtained, if applicable.
23.The Developer shall be responsible for obtaining all necessary permits for all applicable agencies prior to commencement of construction. The
Developer shall notify the the City of Fort Collins Inspector (Fort Collins - 221-6605) and the City of Fort Collins Erosion Control Inspector (Fort
Collins - 221-6700) at least 2 working days prior to the start of any earth disturbing activity, or construction on any and all public improvements. If
the City of Fort Collins Engineer is not available after proper notice of construction activity has been provided, the Developer may commence work
in the Engineer absence. However, the City of Fort Collins reserves the right not to accept the improvement if subsequent testing reveals an
improper installation.
24.The Developer shall be responsible for obtaining soils tests within the Public Right-of-Way after right of way grading and all utility trench work is
complete and prior to the placement of curb, gutter, sidewalk and pavement. If the final soils/pavement design report does not correspond with the
results of the original geotechnical report, the Developer shall be responsible for a re-design of the subject pavement section or, the Developer may
use the City of Fort Collins' default pavement thickness section(s). Regardless of the option used, all final soils/pavement design reports shall be
prepared by a licensed Professional Engineer. The final report shall be submitted to the Inspector a minimum of 10 working days prior to placement
of base and asphalt. Placement of curb, gutter, sidewalk, base and asphalt shall not occur until the City of Fort Collins Engineer approves the final
report.
25.The contractor shall hire a licensed engineer or land surveyor to survey the constructed elevations of the street subgrade and the gutter flowline at
all intersections, inlets, and other locations requested by the the City of Fort Collins inspector. The engineer or surveyor must certify in a letter to
the City of Fort Collins that these elevations conform to the approved plans and specifications. Any deviations shall be noted in the letter and then
resolved with the City of Fort Collins before installation of base course or asphalt will be allowed on the streets.
26.All utility installations within or across the roadbed of new residential roads must be completed prior to the final stages of road construction. For the
purposes of these standards, any work except c/g above the subgrade is considered final stage work. All service lines must be stubbed to the
property lines and marked so as to reduce the excavation necessary for building connections.
27.Portions of Larimer County are within overlay districts. The Larimer County Flood Plain Resolution should be referred to for additional criteria for
roads within these districts.
28.All road construction in areas designated as Wild Fire Hazard Areas shall be done in accordance with the construction criteria as established in the
Wild Fire Hazard Area Mitigation Regulations in force at the time of final plat approval.
29.Prior to the commencement of any construction, the contractor shall contact the Local Entity Forester to schedule a site inspection for any tree
removal requiring a permit.
30.The Developer shall be responsible for all aspects of safety including, but not limited to, excavation, trenching, shoring, traffic control, and security.
Refer to OSHA Publication 2226, Excavating and Trenching.
31.The Developer shall submit a Construction Traffic Control Plan, in accordance with MUTCD, to the appropriate Right-of-Way authority. (The City of
Fort Collins, Larimer County, Colorado), for approval, prior to any construction activities within, or affecting, the Right-of-Way. The Developer shall
be responsible for providing any and all traffic control devices as may be required by the construction activities.
32.Prior to the commencement of any construction that will affect traffic signs of any type, the contractor shall contact the City of Fort Collins Traffic
Operations Department, who will temporarily remove or relocate the sign at no cost to the contractor, however, if the contractor moves the traffic
sign then the contractor will be charged for the labor, materials and equipment to reinstall the sign as needed.
33.The Developer is responsible for all costs for the initial installation of traffic signing and striping for the Development related to the Development's
local street operations. In addition, the Developer is responsible for all costs for traffic signing and striping related to directing traffic access to and
from the Development.
34.There shall be no site construction activities on Saturdays, unless specifically approved by the City of Fort Collins Engineer, and no site
construction activities on Sundays or holidays, unless there is prior written approval by City of Fort Collins.
35.The Developer is responsible for providing all labor and materials necessary for the completion of the intended improvements, shown on these
drawings, or designated to be provided, installed, or constructed, unless specifically noted otherwise.
36.Dimensions for layout and construction are not to be scaled from any drawing. If pertinent dimensions are not shown, contact the Designer for
clarification, and annotate the dimension on the as-built record drawings.
37.The Developer shall have, onsite at all times, one (1) signed copy of the approved plans, one (1) copy of the appropriate standards and
specifications, and a copy of any permits and extension agreements needed for the job.
38.If, during the construction process, conditions are encountered which could indicate a situation that is not identified in the plans or specifications,
the Developer shall contact the Designer and the City of Fort Collins Engineer immediately.
39.The Developer shall be responsible for recording as-built information on a set of record drawings kept on the construction site, and available to the
Larimer County's Inspector at all times. Upon completion of the work, the contractor(s) shall submit record drawings to the City of Fort Collins
Engineer.
40.The Designer shall provide, in this location on the plan, the location and description of the nearest survey benchmarks (2) for the project as well as
the basis of bearings. The information shall be as follows:
PROJECT DATUM: NAVD88
CITY OF FORT COLLINS BENCHMARK 2-94 EAST DRAKE AND ENVIRONMENTAL DRIVE, APPROX. 110 FEET EAST OF SOUTH
ENTRANCE TO WATER TREATMENT PLANT #2, ON TOP OF THE SECTION CORNER MONUMENT DATED 1989 IN RANGE BOX,
12 FEET WEST OF TOP OF DITCH BANK, 25 FEET NORTH OF THE RAILROAD TRACKS, AND 27 FEET SOUTH OF LARGE
COTTONWOOD TREE.
ELEVATION = 4881.57
PLEASE NOTE: THIS PLAN SET IS USING NAVD88 FOR A VERTICAL DATUM. SURROUNDING DEVELOPMENTS HAVE USED
NGVD29 UNADJUSTED DATUM (PRIOR CITY OF FORT COLLINS DATUM) FOR THEIR VERTICAL DATUMS.
IF NGVD29 UNADJUSTED DATUM (PRIOR CITY OF FORT COLLINS DATUM) IS REQUIRED FOR ANY PURPOSE, THE FOLLOWING
EQUATION SHOULD BE USED:
NGVD29 UNADJUSTED DATUM (PRIOR CITY OF FORT COLLINS DATUM) = NAVD88 DATUM - 3.19'
BASIS OF BEARINGS
ASSUMING THE NORTH LINE OF THE NORTHWEST QUARTER OF SECTION 28, TOWNSHIP 7 NORTH, RANGE 68 WEST, AS
BEARING SOUTH 88°42'05" EAST AS SHOWN ON THE PLAT.
41.All stationing is based on centerline of roadways unless otherwise noted.
42.Damaged curb, gutter and sidewalk existing prior to construction, as well as existing fences, trees, streets, sidewalks, curbs and gutters,
landscaping, structures, and improvements destroyed, damaged or removed due to construction of this project, shall be replaced or restored in like
kind at the Developer's expense, unless otherwise indicated on these plans, prior to the acceptance of completed improvements and/or prior to the
issuance of the first Certificate of Occupancy.
43.When an existing asphalt street must be cut, the street must be restored to a condition equal to or better than its original condition. The existing
street condition shall be documented by the City of Fort Collins Construction Inspector before any cuts are made. Patching shall be done in
accordance with the City of Fort Collins Street Repair Standards. The finished patch shall blend in smoothly into the existing surface. All large
patches shall be paved with an asphalt lay-down machine. In streets where more than one cut is made, an overlay of the entire street width,
including the patched area, may be required. The determination of need for a complete overlay shall be made by the Larimer County Engineer
and/or the City of Fort Collins Inspector at the time the cuts are made.
44.Upon completion of construction, the site shall be cleaned and restored to a condition equal to, or better than, that which existed before
construction, or to the grades and condition as required by these plans.
45.Standard Handicap ramps are to be constructed at all curb returns and at all "T" intersections.
46.After acceptance by the City of Fort Collins, public improvements depicted in these plans shall be guaranteed to be free from material and
workmanship defects for a minimum period of two years from the date of acceptance.
47.The City of Fort Collins shall not be responsible for the maintenance of roadway and appurtenant improvements, including storm drainage
structures and pipes, for the following private streets: N.A.
48.Approved Variances are listed as follows:
1) N/A
CONSTRUCTION NOTES
A. Grading and Erosion Control Notes
1.The erosion control inspector must be notified at least twenty-four (24) hours prior to any construction on this site.
2.There shall be no earth-disturbing activity outside the limits designated on the accepted plans.
3.All required perimeter silt and construction fencing shall be installed prior to any land disturbing activity (stockpiling, stripping, grading, etc). All
other required erosion control measures shall be installed at the appropriate time in the construction sequence as indicated in the approved project
schedule, construction plans, and erosion control report.
4.At all times during construction, the Developer shall be responsible for preventing and controlling on-site erosion including keeping the property
sufficiently watered so as to minimize wind blown sediment. The Developer shall also be responsible for installing and maintaining all erosion
control facilities shown herein.
5.Pre-disturbance vegetation shall be protected and retained wherever possible. Removal or disturbance of existing vegetation shall be limited to the
area(s) required for immediate construction operations, and for the shortest practical period of time.
6.All soils exposed during land disturbing activity (stripping, grading, utility installations, stockpiling, filling, etc.) shall be kept in a roughened condition
by ripping or disking along land contours until mulch, vegetation, or other permanent erosion control BMPs are installed. No soils in areas outside
project street rights-of-way shall remain exposed by land disturbing activity for more than thirty (30) days before required temporary or permanent
erosion control (e.g. seed/mulch, landscaping, etc.) is installed, unless otherwise approved by the City/County.
7.In order to minimize erosion potential, all temporary (structural) erosion control measures shall:
a.Be inspected at a minimum of once every two (2) weeks and after each significant storm event and repaired or reconstructed as necessary in
order to ensure the continued performance of their intended function.
b.Remain in place until such time as all the surrounding disturbed areas are sufficiently stabilized as determined by the erosion control inspector.
c.Be removed after the site has been sufficiently stabilized as determined by the erosion control inspector.
8.When temporary erosion control measures are removed, the Developer shall be responsible for the clean up and removal of all sediment and
debris from all drainage infrastructure and other public facilities.
9.The contractor shall immediately clean up any construction materials inadvertently deposited on existing streets, sidewalks, or other public rights of
way, and make sure streets and walkways are cleaned at the end of each working day.
10.All retained sediments, particularly those on paved roadway surfaces, shall be removed and disposed of in a manner and location so as not to
cause their release into any waters of the United States.
11.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 thirty (30) days shall be seeded and mulched.
12.The stormwater volume capacity of detention ponds will be restored and storm sewer lines will be cleaned upon completion of the project and
before turning the maintenance over to the City/County or Homeowners Association (HOA).
13.City Ordinance and Colorado Discharge Permit System (CDPS) requirements make it unlawful to discharge or allow the discharge of any pollutant
or contaminated water from construction sites. Pollutants include, but are not limited to discarded building materials, concrete truck washout,
chemicals, oil and gas products, litter, and sanitary waste. The developer shall at all times take whatever measures are necessary to assure the
proper containment and disposal of pollutants on the site in accordance with any and all applicable local, state, and federal regulations.
14.A designated area shall be provided on site for concrete truck chute washout. The area shall be constructed so as to contain washout material and
located at least fifty (50) feet away from any waterway during construction. Upon completion of construction activities the concrete washout
material will be removed and properly disposed of prior to the area being restored.
15.Conditions in the field may warrant erosion control measures in addition to what is shown on these plans. The Developer shall implement whatever
measures are determined necessary, as directed by the City.
16.For additional information see separate Stormwater Management Plan / Erosion Control Report for Bucking Horse Filing 2.
B. Street Improvement Notes
1.All street construction is subject to the General Notes on the cover sheet of these plans as well as the Street Improvements Notes listed here.
2.A paving section design, signed and stamped by a Colorado licensed Engineer, must be submitted to the City of Fort Collins Engineer for approval,
prior to any street construction activity, (full depth asphalt sections are not permitted at a depth greater than 8 inches of asphalt). The job mix shall
be submitted for approval prior to placement of any asphalt.
3.Where proposed paving adjoins existing asphalt, the existing asphalt shall be saw cut, a minimum distance of 12 inches from the existing edge, to
create a clean construction joint. The Developer shall be required to remove existing pavement to a distance where a clean construction joint can
be made. Wheel cuts shall not be allowed unless approved by the City of Fort Collins Engineer in Fort Collins.
4.Street subgrades shall be scarified the top 12 inches and re-compacted prior to subbase installation. No base material shall be laid until the
subgrade has been inspected and approved by the City of Fort Collins Engineer.
5.Ft. Collins only. Valve boxes and manholes are to be brought up to grade at the time of pavement placement or overlay. Valve box adjusting rings
are not allowed.
6.When an existing asphalt street must be cut, the street must be restored to a condition equal to or better than its original condition. The existing
street condition shall be documented by the Inspector before any cuts are made. Cutting and patching shall be done in conformance with Chapter
25, Reconstruction and Repair. The finished patch shall blend smoothly into the existing surface. The determination of need for a complete overlay
shall be made by the City of Fort Collins Engineer. All overlay work shall be coordinated with adjacent landowners such that future projects do not
cut the new asphalt overlay work.
7.All traffic control devices shall be in conformance with these plans or as otherwise specified in M.U.T.C.D. (including Colorado supplement) and as
per the Right-of-Way Work Permit traffic control plan.
8.The Developer is required to perform a gutter water flow test in the presence of the City of Fort Collins Inspector and prior to installation of asphalt.
Gutters that hold more than 1/4 inch deep or 5 feet longitudinally, of water, shall be completely removed and reconstructed to drain properly.
9.Prior to placement of H.B.P. or concrete within the street and after moisture/density tests have been taken on the subgrade material (when a full
depth section is proposed) or on the subgrade and base material (when a composite section is proposed), a mechanical "proof roll" will be required.
The entire subgrade and/or base material shall be rolled with a heavily loaded vehicle having a total GVW of not less than 50,000 lbs. and a single
axle weight of at least 18,000 lbs. with pneumatic tires inflated to not less that 90 p.s.i.g. "Proof roll" vehicles shall not travel at speeds greater than
3 m.p.h. Any portion of the subgrade or base material which exhibits excessive pumping or deformation, as determined by the City of Fort Collins
Engineer, shall be reworked, replaced or otherwise modified to form a smooth, non-yielding surface. The City of Fort Collins Engineer shall be
notified at least 24 hours prior to the "proof roll." All "proof rolls" shall be preformed in the presence of an Inspector.
C. Traffic Signing and Pavement Marking Construction Notes
1.All signage and marking is subject to the General Notes on the cover sheet of these plans, as well as the Traffic Signing and Marking Construction
Notes listed here.
2.All symbols, including arrows, ONLYS, crosswalks, stop bars, etc. shall be pre-formed thermo-plastic.
3.All signage shall be per the City of Fort Collins Standards and these plans or as otherwise specified in MUTCD.
4.All lane lines for asphalt pavement shall receive two coats of latex paint with glass beads.
5.All lane lines for concrete pavement should be epoxy paint.
6.Prior to permanent installation of traffic striping and symbols, the Developer shall place temporary tabs or tape depicting alignment and placement
of the same. Their placement shall be approved by the City of Fort Collins Traffic Engineer prior to permanent installation of striping and symbols.
7.Pre-formed thermo-plastic applications shall be as specified in these Plans and/or these Standards.
8.Epoxy applications shall be applied as specified in CDOT Standard Specifications for Road and Bridge Construction.
9.All surfaces shall be thoroughly cleaned prior to installation of striping or markings.
10.All sign posts shall utilize break-away assemblies and fasteners per the Standards.
11.A field inspection of location and installation of all signs shall be performed by the City of Fort Collins Traffic Engineer. All discrepancies identified
during the field inspection must be corrected before the 2-year warranty period will begin.
12.The Developer installing signs shall be responsible for locating and protecting all underground utilities.
13.Special care shall be taken in sign location to ensure an unobstructed view of each sign.
14.Signage and striping has been determined by information available at the time of review. Prior to initiation of the warranty period,the City of Fort
Collins Traffic Engineer reserves the right to require additional signage and/or striping if the City of Fort Collins Traffic Engineer determines that an
unforeseen condition warrants such signage according to the MUTCD or the CDOT M and S Standards. All signage and striping shall fall under the
requirements of the 2-year warranty period for new construction (except fair wear on traffic markings).
15.Sleeves for sign posts shall be required for use in islands/medians. Refer to Chapter 14, Traffic Control Devices, for additional detail.
D. Storm Drainage Notes
1.The City of Fort Collins shall not be responsible for the maintenance of storm drainage facilities located on private property. Maintenance of onsite
drainage facilities shall be the responsibility of the property owner(s).
2.All recommendations of the Drainage And Erosion Control Report For Bucking Horse Park Dated Jan. 26 2022 by Northern Engineering shall be
followed and implemented.
3.Prior to final inspection and acceptance by the City of Fort Collins, certification of the drainage facilities, by a registered engineer, must by
submitted to and approved by the Stormwater Utility Department. Certification shall be submitted to the Stormwater Utility Department at least two
weeks prior to the release of a certificate of occupancy for single family units. For commercial properties, certification shall by submitted to the
Stormwater Utility Department at least two weeks prior to the release of any building permits in excess of those allowed prior to certification per the
Development Agreement.
4.See City of Fort Collins Stormwater Criteria Manual - Appendix F Construction Control Measures Standard Notes and Standard Erosion Control
Notes.
E. Utility Notes
1.All waterline and sanitary sewer construction shall conform to the City of Fort Collins Utility standards and specifications current to date of
construction.
2.The minimum cover over water lines is 4.5 feet and the maximum cover is 5.5 feet unless otherwise noted in the plans and approved by the water
utility.
3.Water mains shall be poly-wrapped D.I.P, or PVC with tracer wire.
4.HDPE pipe may be used for 1-1/2 and 2 inch water services. The pipe shall meet the standards of AWWA 901, NSF Standard 61 and ASTM. The
HDPE pipe shall be SDR 9 having a pressure rating of 200 psi. Stiffeners shall be used at all fittings and connections. Tracer wire shall be
installed with the HDPE service, and shall extend up the curb stop. The curb stop shall be covered with a metal valve box and "water" lid per City
Water Detail 11A.
INFILL AND REDEVELOPMENT NOTE
A.Despite everyone's best efforts, it is impossible to fully display subsurface information prior to excavation. This is especially true in areas of infill and
redevelopment. Unknown subsurface conditions can have cost and schedule implications. Prior to finalizing contract terms, it is strongly
recommended that the Owner and General Contractor have a candid discussion to formulate a strategy for dealing with such circumstances when
they arise. The process and procures should be in place prior to excavation. Allowances and contingencies can address the cost implications, but
additional measures are required to deal with scheduling and factors impacting sequence of work. The Architect, Engineer(s), and Construction
Surveyor should be made aware of the protocol for dealing with such unknown subsurface conditions prior to starting work.
CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU
DIG, GRADE, OR EXCAVATE FOR THE MARKING OF
UNDERGROUND MEMBER UTILITIES.
CALL UTILITY NOTIFICATION CENTER OF
COLORADO
Know what'sbelow.
before you dig.Call
R
STSTCMCMEXXXX
X
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X X X
X X
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GREAT WESTERN
RAIL ROAD
RIPRAP
POUDRE RIVER 500-YR
FLOODPLAIN (PER RiskMAP)
AREA DRAIN AREA DRAIN AREA DRAIN AREA DRAIN
AREA DRAINAREA DRAINAREA DRAIN
AREA DRAIN
AREA DRAIN
RIPRAP
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EPALOMINO COURTGREAT WESTERN RAILROAD
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EC1EROSION CONTROL PLAN12
( IN FEET )
1 inch = ft.
Feet04040
40
80 120
CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU
DIG, GRADE, OR EXCAVATE FOR THE MARKING OF
UNDERGROUND MEMBER UTILITIES.
CALL UTILITY NOTIFICATION CENTER OF
COLORADO
Know what'sbelow.
before you dig.Call
R
SheetBUCKING HORSE PARKThese drawings areinstruments of serviceprovided by NorthernEngineering Services, Inc.and are not to be used forany type of constructionunless signed and sealed bya Professional Engineer inthe employ of NorthernEngineering Services, Inc.NOT FOR CONSTRUCTIONREVIEW SETENGINEERNGIEHTRONRNFORT COLLINS: 301 North Howes Street, Suite 100, 80521GREELEY: 820 8th Street, 80631970.221.4158northernengineering.comof 14
EROSION CONTROL NOTES:
1.IT SHOULD BE NOTED THAT ANY EROSION CONTROL PLAN SERVES ONLY AS A GUIDELINE TO THE
CONTRACTOR. STAGING AND/OR PHASING OF BEST MANAGEMENT PRACTICES (BMPs) IS EXPECTED.
ADDITIONAL AND/OR DIFFERENT BMPs FROM THOSE ORIGINALLY DEPICTED MAY BE NECESSARY
DURING CONSTRUCTION DUE TO CHANGING SITE CONDITIONS OR AS REQUIRED BY LOCAL
AUTHORITIES.
2.THIS EROSION CONTROL PLAN IS SCHEMATIC IN NATURE. AS SUCH, GRAPHICAL SYMBOLS MAY NOT
BE TO SCALE, NOR ARE THEY NECESSARILY SHOWN IN THEIR EXACT LOCATION.
3.THE CONTRACTOR SHALL BE RESPONSIBLE FOR ALL PERMITTING (CITY, STATE DISCHARGE PERMIT,
ETC.) AND COMPLIANCE WITH GOVERNING AUTHORITIES. IT SHALL BE THE RESPONSIBILITY OF THE
CONTRACTOR (OR PERMIT HOLDER) TO ENSURE EROSION CONTROL MEASURES ARE PROPERLY
MAINTAINED AND FOLLOWED.
4.CONTRACTOR SHALL IMPLEMENT THE APPROPRIATE EROSION CONTROL MEASURES ACCORDING
THE THE CONSTRUCTION SEQUENCING AND LEVEL OF SITE STABILIZATION.
5.CONTRACTOR SHALL IMPLEMENT APPROPRIATE INLET PROTECTION FOR ALL STORM DRAINS,
SWALES, UNTIL SITE IS FULLY STABILIZED.
6.CONTRACTOR SHALL IMPLEMENT APPROPRIATE INLET PROTECTION FOR DOWNSPOUT
CONNECTIONS, TO THE STORM DRAIN SYSTEM, UNTIL CONNECTION IS ESTABLISHED WITH
DOWNSPOUT.
7.INLET PROTECTION SHALL BE ADAPTED, AS NECESSARY, TO THE SURROUNDING SURFACE TYPE AND
CONDITION (i.e., STAKE-DRIVEN WATTLES FOR BARE SOIL, GRAVEL SOCKS FOR PAVEMENT, ETC.)
8.CONTRACTOR IS RESPONSIBLE FOR STABILIZING ALL SLOPES, PARTICULARLY THOSE STEEPER THAN
6:1. CRIMP MULCHING, HYDRO MULCHING, EROSION MATS, TEMPORARY IRRIGATION, AND
ADDITIONAL WATTLES OR SILT FENCING MAY BE NECESSARY TO ESTABLISH VEGETATIVE COVER
AND STABILIZE THE SLOPE.
9.CONTRACTOR IS RESPONSIBLE FOR PREVENTING SEDIMENT FROM UNSTABILIZED LANDSCAPE
AREAS FROM MIGRATING ONTO AND ENTERING THE PERMEABLE PAVER SYSTEMS UNTIL
UPGRADIENT TRIBUTARY AREAS ARE FULLY STABILIZED.
10.ADDITIONAL WATTLES, SILT FENCE, OR OTHER MEASURES, MAY BE NECESSARY TO ENSURE THAT
EACH BUILDING PAD IS STABILIZED THROUGHOUT CONSTRUCTION. WATTLES SHALL BE PROVIDED
AROUND BUILDING PAD SIDES TO ENSURE AT NO TIME SHALL SEDIMENT BE ALLOWED TO CROSS THE
PUBLIC SIDEWALKS.
11.CONTRACTOR SHALL IMPLEMENT APPROPRIATE PERIMETER PROTECTION FOR AREAS DIRECTING
DRAINAGE OFFSITE. PERIMETER PROTECTION SHALL BE ADAPTED, AS NECESSARY, TO THE
SURROUNDING SURFACE TYPE AND CONDITION (i.e., STAKE-DRIVEN SEDIMENT CONTROL LOGS OR
SILT FENCE FOR BARE SOIL, GRAVEL SOCKS FOR PAVEMENT, ETC.)
12.FUELING FACILITIES SHALL BE LOCATED AT LEAST ONE HUNDRED (100) FEET FROM NATURAL BODY
OF WATER, WETLAND, NATURAL DRAINAGE WAY OR MANMADE DRAINAGE WAY. THE FUEL TANKS
AND FUELING AREA MUST BE SET IN A CONTAINMENT AREA THAT WILL NOT ALLOW A FUEL SPILL TO
DIRECTLY FLOW, SEEP, RUN OFF, OR BE WASHED INTO A BODY OF WATER, WETLAND OR DRAINAGE
WAY.
13.CONSTRUCTION WASTE STORAGE (DUMPSTERS) AND PORTABLE SANITATION UNITS (CONSTRUCTION
TOILETS) SHALL BE LOCATED AT LEAST FIFTY (50) FEET FROM ANY STORMWATER INLET, WETLAND,
OR DRAINAGE WAY. SAID FACILITIES MUST BE SET IN A CONTAINMENT AREA THAT WILL NOT ALLOW
POLLUTANTS TO DIRECTLY FLOW, SEEP, RUN OFF, OR BE WASHED INTO A BODY OF WATER,
WETLAND OR DRAINAGE WAY. DUMPSTERS SHALL BE LOCATED ON FLAT, STABLE GROUND, AND
CONSTRUCTION TOILETS SHALL BE STAKED DOWN.
14.THE CONTRACTOR AND ALL SUBCONTRACTORS WILL COOPERATE WITH THE CITY'S CONSTRUCTION
INSPECTORS BY CEASING OPERATIONS WHEN WINDS ARE OF SUFFICIENT VELOCITY TO CREATE
BLOWING DUST WHICH, IN THE INSPECTOR'S OPINION, IS HAZARDOUS TO THE PUBLIC HEALTH AND
WELFARE.
15.WHERE SEASONAL CONSTRAINTS (E.G., DURING SUMMER AND WINTER MONTHS) INHIBIT PERMANENT
SEEDING OPERATIONS, DISTURBED AREAS WILL BE TREATED WITH MULCH AND MULCH TACKIFIER
OR OTHER MATERIALS APPROVED BY EROSION CONTROL STAFF TO PREVENT EROSION.
16.SEE LANDSCAPE PLANS FOR ADDITIONAL INFORMATION ON PLANTING, REVEGETATION, HARDSCAPE
AND OTHER PERMANENT SITE STABILIZATION METHODS.
17.DIRT AND DEBRIS FROM CONSTRUCTION ACTIVITIES TRACKED ON CITY STREETS SHALL BE KEPT TO
A MINIMUM AND CLEANED IMMEDIATELY OR AT THE SUGGESTION OF THE CITY'S EROSION CONTROL
INSPECTOR.
18.CONTRACTOR SHALL KEEP CONSTRUCTION VEHICLES ENTERING AND EXITING SITE TO A MINIMUM.
19.THE CONTRACTOR SHALL, AT ALL TIMES DURING AND AFTER SYSTEM INSTALLATION, PREVENT
SEDIMENT, DEBRIS, AND DIRT FROM ANY SOURCE FROM ENTERING THE PERMEABLE PAVEMENT
SYSTEM. LOOSE MATERIALS SHALL NOT BE STORED ON THE PERMEABLE PAVEMENT AREA. MUD AND
SEDIMENT-LADEN RUNOFF SHOULD BE KEPT AWAY FROM THE PAVEMENT AREA. TEMPORARILY
DIVERT RUNOFF OR INSTALL SEDIMENT CONTROL MEASURES AS NECESSARY TO REDUCE THE
AMOUNT OF SEDIMENT RUN-ON TO THE PAVEMENT. SURFACE PROTECTION COULD INCLUDE
COVERING AREAS OF THE PAVEMENT, PROVIDING ALTERNATIVE CONSTRUCTION VEHICLE ACCESS,
AND PROVIDING EDUCATION TO ALL PARTIES WORKING ONSITE.
PROPOSED CONTOUR
PROPOSED STORM SEWER
PROPOSED SWALE
EXISTING CONTOUR
PROPOSED CURB & GUTTER
PROPERTY BOUNDARY
BENCHMARK/BASIS OF BEARING:
PROJECT DATUM: NAVD88
CITY OF FORT COLLINS BENCHMARK 2-94 EAST DRAKE AND
ENVIRONMENTAL DRIVE, APPROX. 110 FEET EAST OF SOUTH
ENTRANCE TO WATER TREATMENT PLANT #2, ON TOP OF THE
SECTION CORNER MONUMENT DATED 1989 IN RANGE BOX, 12
FEET WEST OF TOP OF DITCH BANK, 25 FEET NORTH OF THE
RAILROAD TRACKS, AND 27 FEET SOUTH OF LARGE
COTTONWOOD TREE.
ELEVATION = 4881.57
PLEASE NOTE: THIS PLAN SET IS USING NAVD88 FOR A
VERTICAL DATUM. SURROUNDING DEVELOPMENTS HAVE
USED NGVD29 UNADJUSTED DATUM (PRIOR CITY OF FORT
COLLINS DATUM) FOR THEIR VERTICAL DATUMS.
IF NGVD29 UNADJUSTED DATUM (PRIOR CITY OF FORT
COLLINS DATUM) IS REQUIRED FOR ANY PURPOSE, THE
FOLLOWING EQUATION SHOULD BE USED:
NGVD29 UNADJUSTED DATUM (PRIOR CITY OF FORT
COLLINS DATUM) = NAVD88 DATUM - 3.19'
BASIS OF BEARINGS
ASSUMING THE NORTH LINE OF THE NORTHWEST
QUARTER OF SECTION 28, TOWNSHIP 7 NORTH, RANGE 68
WEST, AS BEARING SOUTH 88°42'05" EAST AS SHOWN ON
THE PLAT.
SILT FENCE
ROCK SOCK
RIPRAP
1.CONTRACTOR SHALL IMMEDIATELY STABILIZE ALL DISTURBED SLOPES BY
CRIMP MULCHING OR SIMILAR METHODS.
2.SWMP ADMINISTRATOR:
Contact ________________________________
Company ________________________________
Address ________________________________
Phone________________________________
3.CONTRACTOR TO PROVIDE VEHICLE TRACKING CONTROL FOR CONCRETE
WASHOUT AREA IF ACCESS IS OFF PAVEMENT.
4.REFER TO THE Drainage and Erosion Control Report for Bucking Horse Park dated
Jan. 26 2022 BY NORTHERN ENGINEERING FOR ADDITIONAL INFORMATION.
GENERAL NOTES:
WATTLE DIKE
CONCRETE WASH AREA
LEGEND:
INLET PROTECTION
VEHICLE TRACKING CONTROL PAD
SF
NORTH
TABLE OF CONSTRUCTION SEQUENCE AND BMP APPLICATION
Project: BUCKING HORSE PARK
CONSTRUCTION PHASE MOBILIZATION DEMOLITION GRADING
BEST MANAGEMENT PRACTICES (BMPS)
Structural "Installation"
Flow Barriers (Bales, Wattles, etc.) (RS)
UTILITIES
INSTALLATION
FLAT WORK
INSTALLATION
Concrete Washout Area (CWA)
* All Temporary BMPs to be Removed once Construction is Complete
Vehicle Tracking Pad * (VTC)
Construction Fence (CF)
SheetBUCKING HORSE PARKThese drawings areinstruments of serviceprovided by NorthernEngineering Services, Inc.and are not to be used forany type of constructionunless signed and sealed bya Professional Engineer inthe employ of NorthernEngineering Services, Inc.NOT FOR CONSTRUCTIONREVIEW SETENGINEERNGIEHTRONRNFORT COLLINS: 301 North Howes Street, Suite 100, 80521GREELEY: 820 8th Street, 80631970.221.4158northernengineering.comof 14
EC2EROSION CONTROL DETAILS13
VTC
ROCK SOCK SECTION ROCK SOCK PLAN
ROCK SOCK JOINTING
GRADATION TABLE
SIEVE SIZE
MASS PERCENT
PASSING SQUARE
MESH SIEVES
NO. 4
2"100
1-1/2"90-100
1"20-55
3/4"0-15
3/8"0-5
MATCHES SPECIFICATIONS FOR NO. 4 COARSE AGGREGATE FOR
CONCRETE PER AASHTO M43. ALL ROCK SHALL BE FRACTURED FACE,
ALL SIDES
RS
001 CONCRETE WASHOUT AREA 002 ROCK SOCK 003 VEHICLE TRACKING PAD 004 SILT FENCE
SF
CWA
005 CURB INLET PROTECTION
IP
POSTS
PREASSEMBLED SILT FENCE POSTS SHALL OVERLAP
AT JOINTS SO THAT NO
GAPS EXIST IN SILT FENCE.
NOTE:
THICKNESS OF GEOTEXTILE
HAS BEEN EXAGGERATED.POST SHALL BE JOINED AS SHOWN, THEN
ROTATED 180° IN DIRECTION SHOWN AND
DRIVEN INTO THE GROUND.
SILT FENCE JOINTS
DRIVE POSTS VERTICALLY INTO THE GROUND TO A MINIMUM DEPTH OF 18".
EXCAVATE A TRENCH APPROXIMATELY 4" WIDE AND 4" DEEP ALONG THE
LINE OF POSTS AND UPSLOPE FROM THE BARRIER.
ANCHOR TRENCH SHALL BE EXCAVATED BY HAND, WITH TRENCHER, OR
WITH SILT FENCE INSTALLATION MACHINE. NO ROAD GRADERS, BACKHOES,
ETC. SHALL BE USED.
NOT LESS THAN THE BOTTOM 1' OF THE SILT FENCE FABRIC SHALL BE
BURIED IN THE TRENCH.
THE TRENCH SHALL BE COMPACTED BY HAND, WITH "JUMPING JACK" OR BY
WHEEL ROLLING. COMPACTION SHALL BE SUCH THAT THE SILT FENCE
RESISTS BEING PULLED OUT OF ANCHOR TRENCH BY HAND.
SILT FENCE INDICATED IN THE PLANS SHALL BE INSTALLED PRIOR TO ANY
LAND-DISTURBING ACTIVITIES.
USE WOOD POSTS OR OTHER MATERIAL AS ACCEPTED BY THE CITY.
INSTALLATION NOTES:
1.
2.
3.
4.
5.
6.
7.
THE CONTRACTOR SHALL INSPECT SILT FENCE EVERY TWO WEEKS AND
AFTER SIGNIFICANT STORM EVENTS AND MAKE REPAIRS OR CLEAN OUT
UPSTREAM SEDIMENT AS NECESSARY.
SEDIMENT ACCUMULATED UPSTREAM OF SILT FENCE SHALL BE REMOVED
WHEN THE UPSTREAM SEDIMENT REACHES A DEPTH OF 6".
SILT FENCE SHALL BE REMOVED WHEN THE UPSTREAM DISTURBED AREA IS
STABILIZED AND GRASS COVER IS ACCEPTED BY THE CITY. IF ANY
DISTURBED AREA EXISTS AFTER REMOVAL, IT SHALL BE SEEDED AND
MULCHED OR OTHERWISE STABILIZED IN A MANNER ACCEPTED BY THE CITY.
MAINTENANCE NOTES:
1.
2.
3.
4" MIN.
4" MIN.
1 12" x 1 12" WOODEN FENCE POSTS
SF
006 SWALE WATTLE DIKE
007 AREA INLET INLET PROTECTION
IP2
STORMWATER MANAGEMENT PLAN (SWMP)
BUCKING HORSE PARK
Fort Collins, CO
January 26, 2022
Prepared for:
City of Fort Collins
Attn; Matt Schaefer
PO Box 580
Fort Collins, CO 80522
Prepared by:
301 North Howes Street, Suite 100
Fort Collins, Colorado 80521
Phone: 970.221.4158 Fax: 970.221.4159
www.northernengineering.com
Project Number: 1748-002
This Drainage Report is consciously provided as a PDF.
Please consider the environment before printing this document in its entirety.
When a hard copy is absolutely necessary, we recommend double-sided printing.
January 26, 2022
City of Fort Collins
Attn; Matt Schaefer
PO Box 580
Fort Collins, CO 80522
RE: Stormwater Management Plan
Bucking Horse Park
To Whom It May Concern:
Northern Engineering Services, Inc. is pleased to submit this Stormwater Management Plan for the
Bucking Horse Park project. This report outlines Best Management Practices (BMPs) to be
implemented with the proposed construction in order to minimize potential pollutants in stormwater
discharges.
We have prepared this report to accompany the Colorado Department of Public Health and
Environment General Permit for Stormwater Discharge Associated with Construction Activities (aka,
Stormwater Discharge Permit or SDP). The General Permit No. for this SDP is (to be filled-in by
permittee) and the Certification No. for this SDP is (to be filled-in by permittee). The Permit
Certification is Effective beginning (to be filled-in by permittee), and initial certification expires (to be
filled-in by permittee). A copy of the issuance cover letter can be found in the Appendix D of this
document (to be provided by permittee).
Please note: this Stormwater Management plan (including the Site Maps) is not a static document.
It is a dynamic device that should be kept current and logged as construction takes place. As such,
this version was prepared to facilitate initial plan approvals and permitting, but does not necessarily
reflect the final version, or the transitions throughout the construction process. As the site develops
and changes, the Contractor is expected and encouraged to make changes to what is contained
herein so that the SWMP works as effectively and efficiently as possible. It shall be the
responsibility of the SWMP Administrator and/or the permit holder (or applicant thereof) to ensure
the plan is properly maintained and followed.
If you should have any questions or comments as you review this report, please feel free to contact
us at your convenience.
Sincerely,
NORTHERN ENGINEERING SERVICES, INC.
Carlos Ortiz García
Bucking Horse Park
Stormwater Management Plan
TABLE OF CONTENTS
Vicinity Map
1.0 Project Descriptions and Nature of Construction ........................................................... 1
1.1 Existing Site Description .............................................................................................. 1
1.2 Nature of Construction Activity ..................................................................................... 1
1.3 Site Disturbance ......................................................................................................... 1
1.4 Existing Topographic and Soil Data ............................................................................... 1
1.5 Receiving Waters ........................................................................................................ 1
1.6 Existing Site Conditions and Vegetation ......................................................................... 1
1.7 Existing Groundwater .................................................................................................. 2
1.8 Existing Ground Contamination ..................................................................................... 2
2.0 Proposed Construction Activities .................................................................................. 2
2.1 Sequence of Major Activities ......................................................................................... 2
3.0 General Requirements ................................................................................................ 2
3.1 Objectives .................................................................................................................. 2
3.2 SMWP Availability ...................................................................................................... 2
3.3 Definitions.................................................................................................................. 2
3.4 Additional Permitting ................................................................................................... 3
4.0 Potential Pollution Sources ......................................................................................... 3
4.1 Disturbed and Stored Soils – YES .................................................................................. 4
4.2 Vehicle Tracking of Sediment – YES .............................................................................. 4
4.3 Management of Contaminated Soils – NO ..................................................................... 4
4.4 Loading and Unloading Operations – NO ...................................................................... 5
4.5 Outdoor Storage of Construction Site Materials, Building Materials, Chemicals etc – YES.... 5
4.6 Bulk Storage of Materials – NO .................................................................................... 5
4.7 Vehicle and Equipment Maintenance and fueling – NO ................................................... 5
4.8 Significant Dust or Particulate Generating Processes – YES ............................................. 6
4.9 Routing Maintenance Activities involving Fertilizer, Pesticides, Detergents, Fuels, Solvents,
Oils – YES 6
4.10 On-Site Waste Management Practices – YES ................................................................. 7
4.11 Concrete Truck/Equipment Washing – YES .................................................................... 7
4.12 Dedicated Asphalt and Concrete Batch Plants – NO ....................................................... 7
4.13 Non-Industrial Waste Sources such as Worker Trash and Portable Toilets – YES ............... 8
4.14 Sawcutting and Grinding – YES ................................................................................... 8
4.15 Material Handling and Spill Prevention – NO .................................................................. 8
4.16 Non-Stormwater Discharges including construction dewatering not covered under the
Construction Dewatering Discharges general permit and wash water that may contribute to pollutants to
the MS4 – NO................................................................................................................................ 9
5.0 Stormwater Management Control Measures ................................................................ 10
5.1 SWMP Administrator ................................................................................................. 10
Bucking Horse Park
Stormwater Management Plan
5.2 Best Management Practices (BMP’s) for Stormwater Pollution Prevention........................ 10
5.3 Structural Practices for Erosion and Sediment Control ................................................... 10
5.4 Non-Structural Practices for Erosion and Sediment Control ............................................ 13
5.5 Phased BMP Installation ............................................................................................ 15
5.6 BMP Inspection ........................................................................................................ 16
5.7 BMP Maintenance .................................................................................................... 16
5.8 Record Keeping ........................................................................................................ 16
6.0 Final Stabilization and Long-Term Stormwater Management ........................................ 17
6.1 Final Stabilization ..................................................................................................... 17
6.2 Long-Term Stormwater Management ........................................................................... 18
7.0 Additional SWMP and BMP Resources ....................................................................... 19
LIST OF TABLES:
Table 1 – Preliminary Permit and Construction Schedule ........................................................ 15
APPENDICES:
APPENDIX A – Site Maps
APPENDIX B – Erosion Control Details
APPENDIX C – Landscape Plan
APPENDIX D – Copies of Permits/Applications
APPENDIX E – Inspection Logs
APPENDIX F – Contractor Inserts (as needed)
APPENDIX G – Contractor Inserts (as needed)
Bucking Horse Park
Stormwater Management Plan 1
1.0 Project Descriptions and Nature of Construction
1.1 Existing Site Description
The project is located in the Southeast ¼ of Section 20, Township 7 North, Range 68 West of the
6th Principal Meridian, City of Fort Collins, County of Larimer, State of Colorado. It is generally
bound to the northwest by single family homes, the east\northeast by the Great Western Railroad,
the southwest by Miles Horse Avenue, and the southeast by a daycare facility and Detention Pond
215.
1.2 Nature of Construction Activity
The proposed project site plan is composed of one small restroom building, numerous park
amenities, and open spaces. The project is also proposing a series of storm lines and grass buffer as
a LID technique.
1.3 Site Disturbance
The site disturbance will occur across roughly 7.54 acres. It is recommended that existing site
condition photos be taken prior to the demolition.
1.4 Existing Topographic and Soil Data
In order to complete the associated construction plans, a topographical survey of the site was
completed. This survey consisted of field measurements made by the City of Fort Collins in August
2019.
A NRCS Custom Soil Resource Report of the lots indicates that the soil on site is composed of
100% Caruso clay loam. Caruso clay loam is considered poorly drained hydrologic Soil Group D
according to NRCS.
NRCS indicates a wind erodibility rating of 6 (of a scale of 1 to 8, 1 is most susceptible to erosion).
As such this site does not have a high potential for wind erosion. NRCS indicates an erosion factor,
K, of 0.32 (range of 0.02-0.69, 0.69 being more susceptible to sheet and rill erosion). As such,
this site has a moderate susceptibility to sheet and rill erosion.
1.5 Receiving Waters
The property historically drains via overland flow at moderate grades (1%–3%) from the southwest
to the northeast, towards an existing channel that runs along the east boundary of the site parallel
to the railroad right-of-way, conveying stormwater from the surrounding area to Detention Pond
215. Offsite flows through the project area are minimal.
1.6 Existing Site Conditions and Vegetation
The existing site vegetation consists of native grasses and invasive weeds. The site has extensive
existing site is vegetated. The composite percent of impervious is 2%. It is highly recommended
that pre-construction photos be taken to clearly document vegetative conditions prior any
disturbance activities.
Bucking Horse Park
Stormwater Management Plan 2
1.7 Existing Groundwater
CTL Thompson, INC. performed Bore Tests in May of 2020 and groundwater was measured at 8.5
to 12 feet during drilling on site.
1.8 Existing Ground Contamination
No existing ground contamination has been identified at this time.
2.0 Proposed Construction Activities
2.1 Sequence of Major Activities
To complete the project, many basic categories of construction activity will take place. The first
part will be the removal of topsoil and native grasses that are currently on-site followed by overlot
grading. Next, utility installation and foundation excavation will begin. Vertical construction of the
building will commence after foundation and underground work is complete. New curb/gutter,
paving, and sidewalks are expected to begin after the storm sewer is in place. The final stages of
site construction will be fine grading of the areas around the building, and the installation of
landscaping throughout the project. The aforementioned sequencing is an initial best guess and is
subject to change at the Contractor’s discretion.
This project is proposed to be built in one phase.
Earthwork export and import to the site is expected to be minimal.
3.0 General Requirements
3.1 Objectives
The objective of a Stormwater Management Plan (SWMP) is to identify all potential sources of
pollution likely to occur as a result of construction activity associated with the site construction, and
to describe the practices that will be used to reduce the pollutants in stormwater discharges from
the site. The SWMP must be completed and implemented at the time the project breaks ground,
and revised as necessary as construction proceeds to accurately reflect the conditions and practices
at the site.
This report summarizes the Stormwater Management Plan for the construction activity that will
occur with Bucking Horse Park in Fort Collins, CO. This plan has been prepared according to
regulations of the Colorado Department of Public Health and Environment (CDPHE), Water Quality
Control Division. This report has been provided to meet the requirements of the City of Fort Collins
Municipal Code §26-498 on water quality control.
3.2 SMWP Availability
This report is intended to remain on the aforementioned construction site to allow for maintenance
and inspection updates, and for review during inspection.
3.3 Definitions
BMP – Best Management Practice encompassing a wide range of erosion and sediment control
Bucking Horse Park
Stormwater Management Plan 3
practices, both structural and non-structural in nature, which are intended to reduce or eliminate
any possible water quality impacts from stormwater leaving a construction site.
Erosion Control BMPs – Practices that PREVENT the erosion of soil, such as minimizing the amount
of disturbed area through phasing, temporary stabilization, and preserving existing vegetation.
Sediment Control BMP’s – Practices to REMOVE sediment from runoff, such as sediment basins,
silt fence, or inlet protection.
Non-structural BMP’s – The implementation of methods, practices, and procedures to minimize
water quality impacts, such as the preservation of natural vegetation, preventive maintenance and
spill response procedures.
Structural BMP’s – Physical devices that prevent or minimize water quality impacts, such as
sediment basins, inlet protection, or silt fence.
3.4 Additional Permitting
As mentioned above, this Stormwater Management Plan is associated with the Colorado
Department of Public Health and Environment Stormwater Permit that is issued by the Water
Quality Control Division of the CDPHE. Additional Environmental permitting not described in this
report may be required as a part of this project. An example is the Construction Dewatering Permit
for groundwater. Another example is the Air Pollution Emission Notice (APEN). The CDPHE
website contains links to both of these permits, as well as many other potential permits. The
Contractor is responsible for ensuring the proper permits are acquired.
4.0 Potential Pollution Sources
As is typical with most construction sites, there are a number of potential pollution sources which
could affect water quality. It is not possible for this report to identify all materials that will be used
or stored on the construction site. It is the sole responsibility of the Contractor to identify and
properly handle all materials that are potential pollution sources. Likely pollution sources are
marked “YES”, unlikely pollution sources are marked “NO”. The following are some common
examples of potential pollution sources:
Disturbed and stored soils
Vehicle tracking of soils and sediment
Management of contaminated soils
Loading and unloading operations
Outdoor storage of construction site materials, building materials, fertilizers, chemicals, etc.
Bulk Storage of Materials
Vehicle and equipment maintenance and fueling
Significant dust or particulate generating processes
Routine maintenance activities involving fertilizers, pesticides, detergents, fuels, solvents, oils,
etc.
On-site waste management practices (waste piles, dumpsters, etc.)
Concrete truck/equipment washing
Dedicated asphalt and concrete batch plants
Non-industrial waste sources, such as worker trash and portable toilets
Saw Cutting and Grinding
Other non-stormwater discharges including construction dewatering not covered under the
Construction Dewatering Discharges general permit and wash water that may contribute
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pollutants to the MS4
4.1 Disturbed and Stored Soils – YES
Approximately 5.0 acres of the site will be disturbed with the Construction Activities. Once soils
have been disturbed they do not retain the same compaction as in their native state, therefore
surface runoff can cause more soil erosion than was historically observed. In the event that
these erosion control practices do not keep sediment on site a structural barrier (silt fence) will
be used and is called out for on the perimeter. If soil manages to migrate from the disturbed
areas onto the hard surfaces it will be swept or scraped (street sweeping) to prevent the
migration of sediment. In case that sediment is washed away too quickly the curb inlets will
need protection (rock sock style inlet protection).
No major stockpiles are expected on this site. Stockpiles in the same respect do not retain the
same compaction and are more susceptible to soil erosion. Stockpiles on this site shall be
placed in or near the center of the site and away from any drainage swales to not require
perimeter run off controls (Materials/Site Management Control). The stock pile will be kept
loose, not compacted, and watered as needed to prevent dust issues (site watering). The
stockpile will be monitored for signs of erosion displacement and sediment accumulation and if
conditions warrant it, the stockpile will be structurally covered or if it is going to sit a long while
will be reseeded (temporary seeding).
4.2 Vehicle Tracking of Sediment – YES
Vehicle tracking of sediment may occur throughout the construction process and along all areas
where the pavement meets the disturbed dirt. This occurs most often after any melt off or rain
conditions when mud collects on vehicles tires and is tracked out onto the road consequently
leaving site. This increases the possibility of sediment discharging to the storm system. To
prevent tracking, access to the site will be limited to construction entrances (vehicle tracking
pads to be installed) on the south side of the site. Vehicle access will be limited on muddy days
(site management control), in this case parking will be kept to the street. The tracking pad will
be monitored visually every day and if track-out becomes a significant problem a larger or more
robust tracking pad may be installed. Otherwise, all track-out that reaches the street will be
scraped and swept (street sweeping). Secondary controls at the closest affected inlets will have
protection (inlet protection) to capture sediment not swept up in a timely manner.
Additional measures can be taken to minimize and control sediment discharges from the site
due to vehicle tracking. These measures can include fencing around the site to control access
points. The use of gravel parking areas and wash racks can also be implemented to ensure
minimal vehicle tracking from the site.
4.3 Management of Contaminated Soils – NO
All data about the site shows that there is no known contamination on the site. If encountered,
the contractor will have the material stored in a covered area (materials management control) as
to not mix with the stormwater until the material can be identified and proper classification and
disposal methods can be determined in accordance with the various waste laws and with good
construction safety and practices.
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4.4 Loading and Unloading Operations – NO
There is not anticipated to be a significant amount of export leaving the site.
During this project there will be a diverse amount of loading and unloading. The foundation
workers will have to deliver forms to the site and deliver premixed concrete. Building materials
will have to be staged around the site and landscapers will have to pile the materials on site to
complete the landscape work. Though the loading and loading vehicles will be contributing to
the track out of materials, depending on the material being delivered to the site they may have a
significant spill potential. Where the trailers must access the site an attempt will be made to
keep the vehicle on the VTC or other stabilized storage areas. When loading and unloading is
occurring, depending on the materials, there may be an increased problem of containers being
dropped, punctured, or broken. These off-loading activities will be located away from storm
drains and will have nearby spill kits accessible. Spills on site will be addressed using spill
prevention and response procedures.
4.5 Outdoor Storage of Construction Site Materials, Building Materials, Chemicals etc – YES
It is anticipated that inert material like wood, shingles, tiles, siding insulation and stone will be
stored on site and outside in the elements. It is also anticipated that materials that do not
weather well (cement, mortar, etc.) will also be located outside. Chemicals are not anticipated
to be left outside. As the inert materials have a lower potential to leave the site they will be
monitored during inspection to make sure they are not being impacted by the exposure to the
elements. (site management control) The materials that will need added attention are the
cements and mortars as they quickly mix with water and cause pollution issues. These materials
when not stored inside will be placed on pallets to get above potential surface runoff and
covered with tarps or plastic to prevent mixing with stormwater (materials management control).
Very small quantities of chemical are needed to contaminate stormwater so the fertilizers,
paints, form oils, petroleum products, and other typical chemicals, will be stored in the
construction connex box, trailers, vehicles, or the like out of contact with precipitation (materials
management control). If not stored in a location as described, secondary containment will be
required. The contractor shall clearly designate site areas for staging and storage of building
materials.
4.6 Bulk Storage of Materials – NO
This site is not expected to store bulk liquid chemicals of more than 55 gallon drums. If this
site does have the need to store liquid chemicals the following procedure should be followed.
These materials should be stored in an area that if a rupture would occur, it would be
contained. The area will need to be located away from the drainage areas and area inlets (site
management / materials management). The containers will be stored in secondary containment
area with a fence so that if a spill were to happen, it would pool in the bottom of the area and
be contained.
4.7 Vehicle and Equipment Maintenance and fueling – NO
Based on the size of the site and the short window of activities vehicle fueling and vehicle
maintenance is highly unlikely. As fueling and equipment maintenance usually result in small
spills of petroleum products it is important to monitor these activities carefully. (site
management control) Some grading companies will employee a fuel truck to fill the heavy
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equipment on site or require the maintenance of a broken machine. In those cases where the
vehicle is not able to be maintained off site, these activities will be done in the least detrimental
way possible. The maintenance and fueling will be located as far from stormwater features as
possible and at least 50 feet from a stormwater feature (site management/materials
management). The fueling activity will have spill materials nearby and a bucket or other
container and shovel located nearby to hang a hose after filling to catch drips, and to scoop up
any dirt that inadvertently mixed with the soil (materials management). That container will have
a lid and be disposed of when the activity is completed. The maintenance work will be done on
a tarp or other material to prevent the residual oils and greases from mixing with the dirt
(materials management). A clearly designated on-site fueling and maintenance area is
suggested
4.8 Significant Dust or Particulate Generating Processes – YES
This project will result in earth moving activities, street sweeping, and track-out and carry out,
bulk materials transport, and saw cutting. As these activities will result in offsite transport of
atmospheric pollution reasonable precautions shall be taken. The project will follow all required
“BMPs” articulated in the Fugitive Dust Manual and a least one additional BMP included during
each of the identified activities in accordance with City Ordinance No. 044 2016. Also, a copy
of the Dust Control Manual will be kept in the trailer during construction for reference. Such
activities will include but not limited to watering the site, covering trucks, slower site speeds
and vehicle tracking mentioned above.
4.9 Routing Maintenance Activities involving Fertilizer, Pesticides, Detergents, Fuels, Solvents,
Oils – YES
Fertilizers and Pesticides will be used during the later phases of the project when trying to
establish a healthy vegetation. These chemicals are highly water soluble and are easily and
unnoticeably carried in the stormwater. Proper application rates and recommended timing of
application will be strictly followed and not on days, or the next day, where the weather is
calling for precipitation (materials management control). As most of these types of chemicals
will be brought on by the landscaper they will be required to keep these products in their
vehicles until time of application and not be allowed to leave these materials on the site (site
management control). If these materials are stored on site they shall be kept inside or outside
covered and above the ground to prevent the materials from mixing with water and runoff
(materials management control). Detergents, paints, acids, cement, grout, and solvents will be
prevalent in the interior work of the building (materials management). These materials also are
typically easily mixed with water yet are typically noticeable by discolored, cloudy, or sudsy
water. As such, the contractor will always keep an eye out for these types of differences in water
around the site (site management control). However these materials are to be handled,
operated, and cleaned up all within the inside of the structure, where external use is concerned
these materials will be stored in the construction connex box, trailers, vehicles, or the like out of
contact with precipitation (materials management). If not stored in a location as described
secondary containment will be required (materials management). Fuels and oils might be
associated with the smaller equipment used on site, chainsaws, pumps, generators, etc. As
petroleum products are easily suspended in water and are spread across the top of the water
surface. These products when located in water have rainbow sheen on them. They are also
monitored during construction (site management controls). These products will be stored in the
construction connex box, trailers, vehicles, or similar structure that will minimize contact with
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precipitation (materials maintenance controls). If not stored in a location as described secondary
containment will be required (materials maintenance). Any untreated runoff from these activities
can be detrimental to wildlife if not cleaned up.
4.10 On-Site Waste Management Practices – YES
All large and heavy weighted waste piles (concrete chunks, excavated pipes, etc.) will be kept in
a neatly grouped pile until the material is to be disposed of properly. These piles will only be
stored the shortest duration possible and will be kept 50 feet from any drainage course or inlet
(Administrative Control). All dry wastes will be maintained through dumpsters and monthly
hauler removal (hauler will be notified if dumpster becomes full and hauled off as needed).
Where available by the hauling company the dumpster will be covered. If not practical or
available by the haul company, an increased removal schedule will be followed and the “Max fill
line” on the dumpster will be strictly followed. Corners of the dumpsters will be monitored for
“Dumpster Juice” leaking into the soil in dry conditions and rain/melt off conditions looking for it
mixing with the runoff. Dumpsters, like the waste piles, will be located at least 50 feet from any
drainage course or inlet. Workers will be sent around at the end of the day to collect trash to
prevent trash being left out overnight. No construction debris (including broken concrete) will be
buried on site.
4.11 Concrete Truck/Equipment Washing – YES
Concrete will be a portion of this project. It is anticipated that it will be used with the joints
around the manholes, pour in place inlets, curb and gutter installation, sidewalks, and
foundations. Pre mixed concrete trucks will be used in this process and will be delivered to the
site and when pouring the foundation. Washing of the concrete equipment will be required to
maintain the concrete equipment. This concrete wash water has a high alkaline content which
is hazardous material to terrestrial and aquatic wildlife. A section of dirt near the entrance will
be excavated and compacted around the sides formed to retain the concrete wash water on site
(as an acceptable practice by the State) so long as the wash water is kept in the washout
(concrete washout). There will be a rock pad for the truck to park on while washing as to
prevent tracking from this washout (VTC). The placement of this washout will be located at
least 50 feet from any drainage course or inlet. Later in the project after the parking lots curb
and gutter has been poured the use of a mobile washout facility will be used on site in a similar
location and after the ground has been leveled (concrete washout – mobile). The contractor
(including all masonry and concrete tradesmen) shall clean out equipment within the washout
area so that the runoff is not allowed to leave the washout. The only exception would be for
them to wash in the next day’s pour location. All concrete workers will be made aware of the
where they are to wash (site management controls & education). If there is a significant amount
of spillage when the transfer from concrete truck to pump truck occurs, a tarp or other ground
cloth should be used to collect spillage. (ground cover control).
4.12 Dedicated Asphalt and Concrete Batch Plants – NO
There will be no dedicated asphalt or concrete batch plants erected onsite for this project.
Premixed concrete and paving materials will be delivered to the site and placed.
In the event that a plant is needed, the Contractor should be aware that additional permitting
will be required. In particular, an Air Pollutant Emission Notice (APEN) will need to be obtained
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from the CDPHE.
4.13 Non-Industrial Waste Sources such as Worker Trash and Portable Toilets – YES
Since facilities are not located nearby for workers to use, trash and sanitary facilities will be
required on the site.
Worker trash will be comingled with the industrial trash and will follow the same controls with
the caveat that a trashcan will be located near the entrance of the site as the contractor will
need to dump their trash from lunch, etc. and this will be emptied weekly or more frequently, if
needed. Designate trash and bulk waste collection areas on-site. Dumpsters should be located
near site entrances to minimize traffic on disturbed soils, and they should be placed on a level
soil surface. When possible, materials should be recycled. Hazardous material waste should be
segregated from other solid waste.
If tipped over and when being cleaned, portable toilet facilities become a potential discharge if
not cleaned up. If human waste is spilled, it will need to be treated as a biological hazard of
untreated sewage and will need to be cleaned up in accordance with Larimer County Health
Department Guidance. The toilets will be staked in a way to prevent tipping on a dirt surface
and located at least 50 feet from a drainage course or inlet. If the site cannot accommodate a
portable toilet on dirt, a containment pan or other secondary containment will be provided. They
will also be anchored prevent from tipping. All materials shall be properly disposed of in
accordance with the law.
4.14 Sawcutting and Grinding – YES
The trench work will require cutting into the City street and some of the landscape rocks will be
specially cut. This project will need the use of hardened saws. These saws generate a significant
amount of dust. Watering the cutting surface to prevent airborne particulates (BMP in the City’s
Fugitive Dust Manual) is required. The cutting slurry has a high content of fine particulates
(Silica Dust, Metals, etc.) that is not allowed to discharge as runoff from the site. To prevent
slurry from discharging offsite, contractors will use the minimum amount of water needed to
prevent dust and blades from overheating (site management control). Cutting slurry will be
collected via vacuum or allowed to dry out and be scraped and swept up after the cutting has
finished (saw cutting).
The following protocol is recommended to prevent dust and slurry from asphalt and concrete
saw cutting activities from migrating into the existing storm drain system.
Slurry and cuttings shall be vacuumed during cutting and surfacing operations
Slurry and cuttings shall not remain on permanent concrete or asphalt pavement overnight
Slurry and cuttings shall not drain to any natural or constructed drainage conveyance
Collected slurry and cuttings shall be disposed of in a manner that does not violate
groundwater or surface water standards
4.15 Material Handling and Spill Prevention – NO
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Potential pollution sources, as discussed in earlier sections, are to be to be identified by the
Contractor. Spill prevention procedures are to be determined and put in place prior to
construction by the Contractor. A spill and flooding response procedure must also be
determined and put in place prior to construction by the Contractor. Additionally, steps should
be taken to reduce the potential for leaks and spills to come in contact with stormwater runoff,
such as storing and handling toxic materials in covered areas or by storing chemicals within
berms or other secondary containment devices.
A notification procedure must be put in place by the Contractor, by which workers would first
notify the site construction superintendent, who would then notify the SWMP Administrator.
Depending on the severity of the spill, the site construction superintendent and SWMP
Administrator would possibly notify the Colorado Department of Public Health and Environment
- Water Quality Control Division, downstream water users, or other appropriate agencies. The
release of any chemical, oil, petroleum product, sewage, etc., which enter waters of the State
of Colorado (which include surface water, ground water, and dry gullies or storm sewers
leading to surface water) must be reported immediately to the Division’s emergency spill
reporting line at (877) 518-5608. All spills that will require cleanup, even if the spill is minor
and does not need to be reported to the state, should still be reported to the City of Fort Collins
Utilities office at 970-221-6700.
While not expected with this project, it will be the responsibility of the Contractor to designate a
fueling area and take the necessary precautions to ensure that no stormwater pollution occurs in
the event that a fueling area is needed. Fueling areas shall be located a minimum 100 feet
from all drainage courses. A 12-inch high compacted earthen ridge capable of retaining
potential spills shall enclose fueling areas. Other secondary containment devices can be used
instead of the earthen ridge. The area shall be covered with a non-porous lining to prevent soil
contamination. Printed instructions for cleanup procedures shall be posted in the fueling area
and appropriate fuel absorbents shall be available along with containers for used absorbents
within the fueling area.
4.16 Non-Stormwater Discharges including construction dewatering not covered under the
Construction Dewatering Discharges general permit and wash water that may contribute to
pollutants to the MS4 – NO
The Stormwater Construction Permit only covers discharges composed entirely of stormwater.
The discharge of pumped stormwater, ONLY, from excavations, ponds, depressions, etc. to
surface waters, or to a municipal storm sewer system is allowed by the Stormwater Construction
Permit, as long as the dewatering activity and associated BMPs are identified in the Stormwater
Management Plan (SWMP) and are implemented in accordance with the SWMP.
Aside from the exceptions noted above, non-stormwater discharges must be addressed in a
separate permit issued for that discharge. If groundwater is encountered, and dewatering is
required, a Construction Dewatering Permit must be acquired from the Colorado Department of
Public Health and Environment.
Based upon the geotechnical data, ground water levels indicate that it will be significantly lower
(about 3 feet) than the bottom of the deepest excavation. However, if encountered, dewatering
activities may be required. Groundwater has in most excavations mixed with the dirt and as they
are pumped they will add an increased velocity coming out of the out flow end contributing to
erosion and speeding the transport of the suspended sediment particles. Also, construction
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dewatering activities must be identified in the Erosion Control Report if they are to be infiltrated
on site. If the material is anticipated to be pumped to a stormwater conveyance the proper
Construction Dewatering Permit must be pulled from the State of Colorado. If pumping activities
are to occur on the site, the use of rock packs on the intake end of the pump will be used and a
silt bag will be used on the outflow end of the pump to reduce the silt and sediment from
leaving the activity (dewatering Control Measure). If this will be under a Dewatering Permit
water samples will be collected in accordance with that permit.
5.0 Stormwater Management Control Measures
5.1 SWMP Administrator
A SWMP Administrator must be designated in conjunction with the Stormwater Permit. This person
shall be responsible for developing, implementing, maintaining, and revising the SWMP. The
SWMP Administrator will also be the contact for all SWMP-related issues and will be the person
responsible for the accuracy, completeness, and implementation of the SWMP. The Administrator
should be a person with authority to adequately manage and direct day-to-day stormwater quality
management activities at the site.
The SWMP Administrator for this site is:
Name: (to be filled-in by permittee)
Company: (to be filled-in by permittee)
Phone: (to be filled-in by permittee)
E-mail: (to be filled-in by permittee)
5.2 Best Management Practices (BMP’s) for Stormwater Pollution Prevention
Beginning from mobilization, and throughout the entire construction of the project, erosion control
devices shall be installed to ensure minimal pollutant migration. These erosion control devices may
be installed in phases, or not at all, depending on actual conditions encountered at the site. It is
the responsibility of the Contractor to make the determination as to what practices should be
employed and when. In the event that a review agency deems BMPs to be insufficient, it shall be
the responsibility of the contractor to implement modifications as directed.
Best Management Practices (BMPs) are loosely defined as a method, activity, maintenance
procedure, or other management practice for reducing the amount of pollution entering a water
body. The term originated from rules and regulations in Section 208 of the Clean Water Act.
Details for Structural and Non-Structural BMPs have been included in Appendix B. These details
should be used for additional information on installation and maintenance of BMPs specified in this
report. It is also intended to serve as a resource for additional BMPs that may be appropriate for
the site that have not specifically been mentioned in the report.
5.3 Structural Practices for Erosion and Sediment Control
Structural BMPs are physical devices that are implemented to prevent erosion from happening or to
limit erosion once it occurs. These devices can be temporary or permanent, and installation of
individual components will vary depending on the stage of construction.
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A table depicting construction sequence and BMP application/removal has been placed on the
“Dynamic Site Plan” to help document the implementation of these BMPs. Refer to the Stormwater
Management Plan Static Site Plan in the Appendix for the assumed location of all BMPs.
Construction Details for Temporary BMPs are located in the Appendix for reference.
Again, the final determination for which BMP’s will be installed, where they will be located, and
when they will be installed shall be made by the Contractor, along with all documentation
throughout the construction process.
Silt Fencing (Phase I)
Silt fencing shall be provided to prevent migration of sediment off-site or into adjacent properties.
All silt fencing shall be installed prior to any land disturbing activity (demolition, stockpiling,
stripping, grading, etc.). Silt fencing is to be installed prior to site excavation or earthwork
activities.
Inspections of the silt fence should identify tears or holes in the material, and should check for
slumping fence or undercut areas that allow flows to bypass the fencing. Damaged sections of the
silt fence should be removed to maintain BMP effectiveness, typically before it reaches a depth of 6
inches.
It is suggested that silt fencing be located along the entire project boundary except at the entrance
to the site off Miles House Avenue. Refer to the Erosion Control Plan (Sheet EC1) for additional
clarification.
Sediment Control Log – aka “Straw Wattles” (Phase I)
A Sediment Control Log is a linear roll made of natural materials, such as straw, coconut fiber, or
other fibrous material trenched into the ground and held with a wooden stake. Sediment Control
Logs can be used in many instances. Examples include perimeter control for stockpiles, as part of
inlet protection designs, as check dams in small drainage ways, on disturbed slopes to shorten flow
lengths, or in lieu of silt fencing (where appropriate).
Sediment Control Logs should be inspected for excess sediment accumulation. Sediment should be
removed prior to reaching half the height of the log.
At a minimum, Sediment Control Logs should be used around soil stockpiles (including landscape
material). There are several swales within and near the project site that should have several straw
wattles. It should be noted that the larger swale that borders the north side of the site should have
several straw wattles to ensure downstream infrastructure is not impacted by construction activities.
Refer to the Erosion Control Plan (EROS1) for additional clarification.
Vehicle Tracking Control Pads (Phase I)
Vehicle tracking control pads shall be provided to minimize tracking of mud and sediment onto
paved surfaces and neighboring roadways. All vehicle tracking control pads shall be installed prior
to any land disturbing activity (demolition – as necessary, stockpiling, stripping, grading, etc.).
Location of vehicle tracking control pads will be located at any and all existing and future vehicle
accesses being used during any of the construction phases. These locations will primarily be
dictated by gates or openings in the temporary construction fencing that is expected to be installed.
Vehicle tracking control pads are to be installed prior to demolition (as appropriate), site excavation
or earthwork activities.
Vehicle tracking pads should be inspected for degradation and aggregate material should be
replaced as needed. If the area becomes clogged with water, excess sediment should be removed.
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Aggregate material should remain rough, and at no point should aggregate be allowed to compact in
a manner that causes the tracking pad to stop working as intended.
Suggested location for vehicle tracking pad is at the designated entrance into the site off Miles
House Avenue.
Inlet Protection (Phase I & II)
Inlet protection shall be provided for existing inlets to prevent sediment transport from adjacent
earthwork disturbance. Installation of these filters shall occur before adjacent earth disturbing
activities (Phase I implementation). Wattle type filters are to be implemented for new and existing
inlets where asphalt does not exist. For these inlets, if pavement is constructed adjacent to the
structure or if the area adjacent to the inlet is changed such that the wattle type filter is no longer
effective, it shall be the responsibility of the Contractor to ensure that an appropriate method is
used instead. For example, the wattle filter could be reused, or a gravel-block inlet filter may be
installed. It will be left to the discretion of the Contractor as to whether replacement of any inlet
filter is necessary.
Inlet protection should be inspected regularly for tears that can result in sediment entering an inlet.
Inlet protection should also be inspected for sediment accumulation upstream of the inlet, and
sediment should be removed when the less than half of the capacity is available, or per
manufacturer specifications.
All proposed Nyloplast Inlets need inlet protection after installation to protect the storm lines and
downstream infrastructure. There are two existing curb inlets along Miles House Avenue, within the
property that will also need to be protected via Inlet Protection. Refer to the Erosion Control Plan
(Sheet EROS1) for additional clarification.
Erosion Control Blankets (Phase II)
A temporary degradable rolled erosion control product composed of natural flexible fibers shall be
used on all seeded slopes 3:1 and greater (excluding mulched shrub bed areas). Erosion control
blankets should be utilized to provide erosion control and to facilitate vegetation establishment.
During installation, it is important to ensure that no gaps or voids exist under the material and that
all corners of the material are secured using stakes and trenching. Stakes should be made of
materials that are biodegradable. Continuous contact between the product and the soil is necessary
to avoid failure.
Erosion Control Blankets should be inspected regularly for signs of erosion, including beneath the
mat. If voids are apparent, they should be filled with suitable soil. Inspections should also identify
loose or damaged stakes, as well as loose portions of the blanket. If deficiencies are found, they
should be repaired or replaced.
Concrete Washout Area (Phase II)
A concrete washout should be provided on the site. The washout can be lined or unlined excavated
pits in the ground, commercially manufactured prefabricated containers, or aboveground holding
areas. The concrete washout must be located a minimum of 400 feet from any natural drainage
way or body of water, and at least 1000 feet from any wells or drinking water sources. Washout
areas should not be located in an area where shallow groundwater may be present. Contractor
shall clearly show the desired location and access to the Concrete Washout Area on the Stormwater
Management Plan - Dynamic Site Plan. Contractor shall place a Vehicle Tracking Pad if the
selected location for the Concrete Washout Area is detached from pavement. Clear signage
identifying the concrete washout should also be provided.
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The Concrete Washout Area should be inspected regularly. Particular attention should be paid to
signage to ensure that the area is clearly marked. Confirmation that the washout is being used
should also be noted to ensure that other undesignated areas of the site are not being used
incorrectly as a concrete washout.
It is suggested the Contractor build a concrete wash out pit for this project near the vehicle tracking
pads. Refer to the Erosion Control Plan (Sheet EROS1) for additional clarification.
Permanent/Established Vegetation (Phase IV)
Permanent or established vegetation and landscaping is considered a permanent form of sediment
and erosion control for common open spaces, steep slopes and areas not exposed to prolonged
scour velocities, or acute incipient motion bed shear stresses that will create soil erosion, rill
formation and subsequent sediment transport. Areas where the previous conditions apply will
contain sufficient permanent BMPs, such as riprap or cobble mulch. Permanent vegetation shall
conform to the approved Landscape Plan prepared by City of Fort Collins. Permanent/Established
vegetation and hardscape defines Phase IV of development.
5.4 Non-Structural Practices for Erosion and Sediment Control
Non-Structural BMPs are practices or activities that are implemented to prevent erosion from
happening or to limit erosion once it occurs. These BMPs can be a practice resulting in physical
change to the site, such as mulching or slope stabilization. They can also result in behavioral
changes on the site, such as changes to construction phasing to minimize exposure to weather
elements, or increased employee awareness gained through training.
Protection of Existing Vegetation (Phases I-IV)
Protection of existing vegetation on a construction site can be accomplished through installation of a
construction fence around the area requiring protection. In cases where up-gradient areas are
disturbed, it may also be necessary to install perimeter controls to minimize sediment loading to
sensitive areas such as wetlands.
Trees that are to remain after construction is complete must be protected. Most tree roots grow
within the top 12”-18” of soil, and soil compaction is a significant threat to tree health. As such,
particular care should be taken to avoid activities within the drip-line of the tree. Direct equipment
damage should also be prevented. The most effective way to ensure the health of trees is to
establish a protection zone at the drip-line of the tree to prevent unintended activity in the area
directly surrounding the tree.
Fencing should be inspected and repaired when needed. If damage occurs to a tree, an arborist
should be consulted on how to care for the tree. If a tree is damage beyond repair, the City Forester
should be consulted on remediation measures.
At a minimum, protection to all trees identified for retention on the plans by The City of Fort Collins
Stockpile Management (Phases I-III)
Stockpile management should be utilized to minimize erosion and sediment transport from soil
stockpiles. In general, soil stockpiles should be located a minimum of 100 feet from any drainage
way and 50 feet from any storm sewer inlets. Where practical, choose a stockpile location that will
remain undisturbed for the longest period of time as the phases of construction progress. Sediment
control BMPs should be placed around the perimeter of the stockpile, and a designated access point
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Stormwater Management Plan 14
on the upstream side of the stockpile should be identified. BMPs such as surface roughening,
temporary seeding, mulching, erosion control blankets, or soil binders should be used to stabilize
the stockpile surface.
As a part of stockpile management, regular inspections of the perimeter controls should be
completed. If BMPs have been utilized to stabilize the surface of the stockpile, they should be
inspected and repaired as needed.
While soil stockpiles are not expected with this project, it is possible that foundation excavation or
the delivery landscaping material may generate temporary stockpiles. The location of any such
stockpiles shall be the responsibility of the SWMP Administrator.
Mulching (Phase I-III)
Mulching helps reduce erosion by protecting bare soil from rainfall impact, increasing infiltration,
and reducing runoff. Although often applied in conjunction with temporary or permanent seeding, it
can also be used for temporary stabilization of areas that cannot be reseeded due to seasonal
constraints. The most common type of mulch used is hay or grass that is crimped into the soil to
keep it secure. However, crimping may not be practical on slopes steeper than three to one
(3H:1V).
The Contractor shall mulch all planted areas within twenty-four (24) hours after planting. Only
weed-free and seed-free straw mulch may be used. Straw mulch should be applied at two (2) tons
per acre, and shall be adequately secured by crimping, tackifier, netting or blankets. Hydraulic
mulching may also be used on steep slopes or where access is limited. In the case that hydraulic
mulching is utilized, the Contractor shall use wood cellulose fibers mixed with water at two
thousands to two thousand five hundred (2,000-2,500) pounds per acre and organic tackifier at
one hundred to four hundred (100-400) pounds per acre.
The Contractor is responsible in applying wood chip mulch to all planted trees and shrubs as shown
on the Landscape Plan prepared by City of Fort Collins.
Wind Erosion/Dust Control (Phase I-IV)
Wind Erosion and Dust Control BMP’s help to keep soil particles from entering the air as a result of
land disturbing construction activities. Attached at the end of the Appendix B is the Fort Collins
Dust Prevention and Control Manual. The purpose of this manual is to establish minimum
requirements consistent with nationally recognize BMP’s for controlling fugitive dust emissions and
to describe applicable best management practices to prevent, minimize, and mitigate off-property
transport or off-vehicle transport of fugitive dust emissions pursuant to Chapter 12, Article X of the
Fort Collins City Code (§12-150 et. seq) for specific dust generating activities and sources.
Examples include use of a water truck or irrigation/sprinkler system to wet the top layer of disturbed
soil, seeding and mulching, soil binders, or wind fences.
Please refer to the last three pages of Appendix B for the Dust Control Plan. A Dust Control Plan is
required for all development projects or construction sites with greater than five (5) acres in size.
Street Sweeping (Phases I -IV)
Street sweeping should be used to remove sediment that has been tracked onto adjacent roadways.
Roadways should be inspected at least once a day, and sediment should be removed as needed. A
check of the area inlet protection should be completed after sweeping to ensure nothing was
displaced during sweeping operations. Street sweeping can reduce the sediment washed into the
existing storm drain system. Street sweeping may be necessary on the existing hardscape areas
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which receive runoff from the disturbed areas.
Good Housekeeping Practices (All phases)
Good housekeeping practices that will prevent pollution associated with solid, liquid, and hazardous
construction-related materials and wastes should be implemented throughout the project.
Examples of good housekeeping include providing an appropriate location for waste management
containers, establishing proper building material staging areas, designating paint and concrete
washout areas, establishing proper equipment/vehicle fueling and maintenance practices.
Development of a spill prevention and response plan is another example of Good Housekeeping
practices that should be used on the project. The following items are detailed examples of some of
the good housekeeping practices that should be utilized throughout the project. It should be noted
that a complete list of practices and detailed discussion regarding good housekeeping has been
included within the Potential Pollution Sources section of this report.
5.5 Phased BMP Installation
It is important to recognize the four (4) major Development Phases as defined by the State of
Colorado’s Stormwater Discharge Permit (SDP). These four development phases (referred to as
Sequencing by the City of Fort Collins) have been distinguished to aid in the appropriate timing of
installation/implementation of BMPs at different stages of the construction process. These phases
are described as follows:
Phase I – Grading Stage; BMPs for initial installation of perimeter controls
Phase II – Infrastructure Stage; BMPs for utility, paving and curb installation
Phase III – Vertical Construction Stage; BMPs for individual building construction.
Phase IV – Permanent BMPs and final site stabilization.
The following is a rough estimate of the anticipated construction sequence for site improvements.
The schedule outlined below is subject to change as the project progresses and as determined by
the General Contractor.
Table 1 – Preliminary Permit and Construction Schedule
TASK BEGINNING
DATE ENDING DATE "BMP-PHASE OF
DEVELOPMENT"
Development Construction
Permit Issued by City of Fort
Collins
March 2022 March 2022 I
Overlot Grading (Demolition) March 2022 March 2022 I
Utility Installation March 2022 April 2022 II
Building Construction April 2022 December 2022 III
Final Stabilization November 2022 December 2022 IV
Included in the back map pockets are two Site Plans: a “Static” Site Plan and a “Dynamic” Site
Plan. The “Static” plan serves to display the overall management plan all at once. However,
proper implementation of BMPs does not occur at once, and certain BMPs may move location in
the construction process; therefore, the “Dynamic” Site Plan is intended for the Contractor to write
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in the BMP symbols to document the location and time the BMPs are installed and maintained
throughout the entire construction process.
5.6 BMP Inspection
All temporary erosion control facilities shall be inspected at a minimum of once every two (2) weeks
and after each significant storm event or snowmelt. Repairs or reconstruction of BMPs, as
necessary, shall occur as soon as possible in order to ensure the continued performance of their
intended function. It is the responsibility of the SWMP Administrator to conduct bi-weekly
inspections, maintain BMPs if needed, to keep records of site conditions and inspections, and to
update the SWMP as necessary.
The construction site perimeter, disturbed areas, all applicable/installed erosion and sediment
control measures, and areas used for material storage that are exposed to precipitation shall be
inspected for evidence of, or the potential for, pollutants entering the drainage system. Erosion and
sediment control measures identified in the SWMP shall be observed to ensure that they are
operating correctly. Attention should be paid to areas that have a significant potential for
stormwater pollution, such as demolition areas, concrete washout locations, and vehicle entries to
the site. The inspection must be documented to ensure compliance with the permit requirements.
5.7 BMP Maintenance
Any BMP’s not operating in accordance with the SWMP must be addressed as soon as possible,
immediately in most cases, to prevent the discharge of pollutants. If modifications are necessary,
such modifications shall be documented so that the SWMP accurately reflects on-site conditions.
The SWMP needs to accurately represent field conditions at all times .
Uncontrolled releases of mud, muddy water, or measurable amounts of sediment found off-site will
be recorded with a brief explanation of the measures taken to clean-up the sediment that has left
the site, as well as the measures taken to prevent future releases. This record shall be made
available to the appropriate public agencies (Colorado Department of Public Health and
Environment, Water Quality Control Division; Environmental Protection Agency; City of Fort Collins;
etc.) upon request.
Preventative maintenance of all temporary and permanent erosion control BMPs shall be provided
in order to ensure the continued performance of their intended function. Temporary erosion control
measures are to be removed after the site has been sufficiently stabilized as determined by the City
of Fort Collins. Maintenance activities and actions to correct problems shall be noted and recorded
during inspections.
Inspection and maintenance procedures specific to each BMP identified with this SWMP are
discussed in Section 3. Details have also been included with Appendix B.
5.8 Record Keeping
Documentation of site inspections must be maintained. The following items are to be recorded and
kept with the SWMP:
Date of Inspection
Name(s) and title(s) of personnel making the inspection
Location(s) of sediment discharges or other pollutants from the site
Location(s) of BMP’s that need to be maintained
Location(s) of BMP’s that failed to operate as designed or proved inadequate
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Stormwater Management Plan 17
Locations(s) where additional BMP’s are needed that were not in place at the time of inspection
Deviations from the minimum inspection schedule
Descriptions of corrective action taken to remedy deficiencies that have been identified
The report shall contain a signed statement indicating the site is in compliance with the permit to the
best of the signer’s knowledge and belief after corrective actions have been taken.
Provided within Appendix E of this SWMP is an Example Inspection Log to aid in the record keeping
of BMP inspections and maintenance. Photographs, field notebooks, drawings and maps should be
included by the SWMP Administrator when appropriate.
In addition to the Inspection Log, records should be kept documenting:
BMP maintenance and operation
Stormwater contamination
Contacts with suppliers
Notes on the need for and performance of preventive maintenance and other repairs
Implementation of specific items in the SWMP
Training events (given or attended)
Events involving materials handling and storage
Contacts with regulatory agencies and personnel
Notes of employee activities, contact, notifications, etc.
Records of spills, leaks, or overflows that result in the discharge of pollutants must be documented
and maintained. A record of other spills that are responded to, even if they do not result in a
discharge of pollutants, should be made. Information that should be recorded for all occurrences
includes the time and date, weather conditions, reasons for the spill, etc. Some spills may need to
be reported to authorities immediately. Specifically, a release of any chemical, oil, petroleum
product, sewage, etc., which may enter waters of the State of Colorado (which include surface
water, ground water and dry gullies or storm sewers leading to surface water) must be reported to
the CDPHE.
Additionally, the “Dynamic Site Plan” is intended to be a “living” document where the SWMP
Administrator can hand write the location of BMPs as they are installed to appropriately reflect the
current site conditions. Also on the “Dynamic Site Plan” is a “Table of Construction Sequence and
BMP Application/Removal” that the SWMP Administrator can use to document when BMPs were
installed or removed in conjunction with construction activities. These items have been included as
an aid to the SWMP Administrator, and other methods of record keeping are at his or her discretion.
This Stormwater Management Plan (both the text and map) is not a static document. It
is a dynamic device intended to be kept current and logged as construction takes place.
It shall be the responsibility of the SWMP Administrator and/or the permit holder (or
applicant thereof) to ensure the plan is properly maintained and followed. Diligent
administration is critical, including processing the Notice to Proceed and noting on the
Stormwater Management Plan the dates that various construction activities occur and
respective BMPs are installed and/or removed.
6.0 Final Stabilization and Long-Term Stormwater Management
6.1 Final Stabilization
Final stabilization of the site will mostly be achieved through hardscape and landscape. Native
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seed is proposed in the detention areas. Landscaped areas are shown to be irrigated turf and rain
garden seed mix.
All disturbed areas will be seeded, crimped and mulched within 24 hours of seeding per the
FCDCM Chapter 2 Section 6.1.4.9. Seeding shall be drilled to a depth of soil amendments such as
compost, peat, aged manure, or other similar materials, shall also be utilized. Soil amendments
shall be tilled into the soil to a minimum depth of 6”, and should comply with the requirements
found in City Code Section 12-132 (refer also to Land Use Code 3.8.21).
Native seed shall be installed per the Landscape plan seed mix and installation instructions. In the
case that a seed mix is not specified, a Fort Collins approved seed mix shall be used. Seed shall be
drill seeded to a depth as specified by the manufacturer. Please see the approved landscape plans
for additional details.
Non-seed stabilization is expected to be completed soon after hardscape construction is complete.
Seeded area will require more time to establish and will be irrigated as necessary to establish
growth.
As defined by the Colorado Department of Public Health and Environment (CDPHE) in the General
Permit Application for Stormwater Discharges, “Final stabilization is reached when all soil disturbing
activities at the site have been completed, and uniform vegetative cover has been established with a
density of at least 70 percent of pre-disturbance levels or equivalent permanent, physical erosion
reduction methods have been employed.” Establishment of 70 percent is required for a
determination for project closure by the City of Fort Collins.
6.2 Long-Term Stormwater Management
The primary method of long-term stormwater management will be the use of bio-retention basins.
The bio-retention basins will remove suspended sediment and pollutants from developed runoff prior
to entering drainage facilities downstream of the site.
After stabilization, prior to project closure, all sediment shall be removed from storm piping per
FCDCM Chapter 2 Section 6.1.4.9.
All disturbed areas will receive permanent paving or will be vegetated per the Landscape Plan.Bio-
retention treatment will provide significant water quality enhancement, and will serve the long-term
stormwater management goals for this project.
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7.0 Additional SWMP and BMP Resources
Mile High Flood District
Urban Storm Drainage Criteria Manual - Volume 3 “Best Management Practices”
Colorado Department of Transportation
Erosion Control and Stormwater Quality Guide
BMP Field Academy
EPA Menu of BMP’s
Construction Site Storm Water Runoff Control
International Stormwater Best Management (BMP) Database
Rocky Mountain Education Center
Rocky Mountain Education Center
Red Rocks Community College, Lakewood
Keep It Clean Partnership
Boulder
Project Number:1748-002 Location:Fort Collins, CO
Date:January 24, 2022 Total Acres:7.54
EROSION CONTROL MEASURE Units
Estimated
Quantity
Unit
Price
Total
Price
each 9 $100.00 $900.00
L.F.1887 $1.10 $2,075.70
each 10 $80.00 $800.00
each 4 $125.00 $500.00
each 1 $300.00 $300.00
each 1 $200.00 $200.00
acre 5 $1,000.00 $5,000.00
TOTAL =$9,775.70
TOTAL =$14,663.55
TOTAL =$11,310.00
REQUIRED AMOUNT OF SECURITY =$14,663.55
NOTE: 'Total Acres' does not represent total disturbed area. Total disturbed area is 7.54 acres.
Concrete Washout Area
Silt Fence
- OR -
Straw Wattles
COST TO VEGETATE: TOTAL ACRES x ($1000/acre) x 1.5
(WHICHEVER IS GREATER)
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Erosion Control Cost Estimate
Vehicle Tracking Control Pads
AMOUNT OF SECURITY = 1.5 x $9,775.70
Vegetate Landscaped Areas
Inlet Protection
Rock Socks
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