HomeMy WebLinkAboutPlans - Stormwater Management Plan - 10/01/2025Bloom Commercial
SWMP Report
PREPARED FOR:
Hartford Homes, LLC
4801 Goodman St.
Timnath, CO 80547
PREPARED BY:
Galloway & Company, Inc.
5235 Ronald Regan Blvd., Suite 200
Johnstown, CO 80534
Contact: James Prelog, PE
DATE:
October 1, 2025
BLOOM COMMERCIAL
Fort Collins, CO
STORMWATER MANAGEMENT PLAN
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Certification ................................................................................................................................................... 4
Engineer’s Statement ....................................................................................................................... 4
Developer’s Certification .................................................................................................................. 4
I. General Requirements .......................................................................................................................... 5
II. Narrative Site Description ..................................................................................................................... 5
Nature of Construction Activity ......................................................................................................... 5
Sequence of Major Activities ............................................................................................................ 6
Extent of Disturbance ....................................................................................................................... 7
Soils.................................................................................................................................................. 7
Pre-Project Vegetation ..................................................................................................................... 7
Potential Pollution Sources .............................................................................................................. 7
Non-Stormwater Discharges ............................................................................................................ 7
Receiving Waters ............................................................................................................................. 8
III. Site Map ................................................................................................................................................ 9
Vicinity Map ...................................................................................................................................... 9
IV. Stormwater Management Controls ..................................................................................................... 10
Qualified Stormwater Manager ...................................................................................................... 10
Other Permits ................................................................................................................................. 10
Potential Pollutant Sources ............................................................................................................ 10
Control Measures for Stormwater Pollution Prevention ................................................................. 16
Erosion Control .............................................................................................................................. 17
Materials Management................................................................................................................... 18
Sediment Control ........................................................................................................................... 19
Site Management and Other Practices .......................................................................................... 20
Offsite Control Measures ............................................................................................................... 21
Revising Control Measures and the SWMP................................................................................... 21
Permit Renewal .............................................................................................................................. 22
V. Final Stabilization & Long-Term Stormwater Management ................................................................ 22
Inactivation of Permit Coverage ..................................................................................................... 24
VI. Inspection & Maintenance Procedures ............................................................................................... 24
Inspection Schedules ..................................................................................................................... 25
Inspection Procedures ................................................................................................................... 26
Control Measure Maintenance/Replacement and Failed Control Measures ................................. 27
Record Keeping and Documentation ............................................................................................. 28
VII. Conclusion .......................................................................................................................................... 29
Conformance with Standards ......................................................................................................... 29
Drainage Concept .......................................................................................................................... 29
VIII. References .......................................................................................................................................... 29
TABLE OF CONTENTS
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NRCS Web Soil Survey Information Generate report from:
https://websoilsurvey.sc.egov.usda.gov/App/HomePage.htm ....................................................... 30
FEMA FIRMette Generate from: https://msc.fema.gov/portal/home ............................................. 30
CDPS Attachment A – SWMP Certification ................................................................................... 30
City of Anytown Grading and Erosion Control Permit .................................................................... 30
Appendix B – SWMP Site Maps and Calculations ...................................................................................... 31
SWMP Site Maps and Details ........................................................................................................ 31
Temporary Sediment Basin Capacity Calculations ........................................................................ 31
Appendix C – Training Documentation ....................................................................................................... 32
Appendix D – Inspection Report ................................................................................................................. 33
State Inspection Report Template ................................................................................................. 33
Appendix E – Spill and Prevention Control ................................................................................................. 34
Spill Prevention and Control Plan .................................................................................................. 34
Site Spill Log .................................................................................................................................. 34
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Certification
Engineer’s Statement
I hereby attest that this Stormwater Management Plan (SWMP) document for the Bloom Commercial
project has been prepared by me or under my direct supervision, and to the best of my knowledge and
ability has been prepared in accordance with requirements. The signature and stamp affixed hereon
certifies that this document was prepared in accordance with the required regulations and criteria;
however, the stamp and signature does not certify that or guarantee future performance of the execution
of the plan by the contractor. The contractor is responsible for the construction work according to the
information set forth in the plan in accordance with all applicable requirements.
________________________________ _________________
First Last Name Date
Registered Professional Engineer
State of Colorado No.
Developer’s Certification
Hartford Homes, LLC hereby certifies that the SWMP facilities for Bloom Commercial shall be installed
and maintained according to the design presented in this report.
This Erosion and Sediment Control Plan has been placed in the City of Fort Collins file for this project.
The Plan fulfills the Urban Drainage and Flood Control District’s technical criteria and the criteria for
erosion control and requirements of City of Fort Collins to the best of my knowledge. I understand that
additional erosion control measures may be needed if unforeseen erosion problems occur or if the
submitted Plan does not function as intended. The requirements of this Plan shall run with the land and
be the obligation of the land owner until such time as the plan is properly completed, modified, or voided.
________________________________ _________________
Authorized Signature Date
Hartford Homes, LLC
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I. General Requirements
This Stormwater Management Plan (SWMP) has been prepared for Hartford Homes, LLC, the developer
of the site, to fulfill the SWMP requirements of the State of Colorado. The SWMP identifies all potential
pollution sources which may be expected to affect stormwater quality and the initial (construction phase)
and final (after construction) erosion and sedimentation control requirements. It also specifies the use
and maintenance of control measures, designed in accordance with sound engineering and hydrologic
practices, to reduce pollutants and sediment in stormwater discharges associated with construction
activity. The control measures are presented in detail in the text of this report and are shown on the
Erosion and Sediment Control plans (Site Maps) included in the back of this report. This site must
implement the provisions of this SWMP as written and updated from commencement of construction
activity until final stabilization is complete. Both the owner and operator must apply as permittees, except
for instances where the duties of the owner and operator are managed by the owner. The permittee is
responsible for updating the SWMP as construction activity on the site dictates and documenting any
changes within this document. Additionally, this SWMP details control measures and processes for spill
prevention control and countermeasures which shall be adhered to on site.
II. Narrative Site Description
The project is located directly south of Donella Drive and north of East Mulberry Street, just west of I -25,
to the east of the Mosaic Subdivision in Fort Collins, Colorado . The project is located in the NW ¼ of
Section 9, Township 7 N, Range 66 West of the 6th P.M., City of Fort Collins, County of Larimer, State of
Colorado. A vicinity map is included in Section IV for reference.
Project Coordinate Location
• Longitude 105°07’02.4” W
• Latitude 40°35’00.6” N
The Bloom Commercial development encompasses ±35.6 acres and will include the development of
multi-family homes, commercial use, and associated streets, utilities, and open space.
Nature of Construction Activity
The project consists of the construction of utility and roadway infrastructure for the commercial
subdivision. Improvements will include cut/fill grading, underground utility mains and service extensions,
internal roadway installation, building foundation and vertical construction, installation of detention/water
quality facilities, and installation of associated landscaping, parking, drives, and site amenities.
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Sequence of Major Activities
The projected sequence of work is expected to occur in the following order, with some overlap and
adjustments as site conditions dictate:
• Install control measures
• Construct drainage swales
• Clear and grub
• Rough overlot grading
• Grade building pad
• Trench and install underground utilities
• Commence vertical construction
• Fine grade the remainder of the site
• Pavement installation
• Seed native areas and install permanent landscaping
• Remove final control measures upon establishment of vegetation
Construction is anticipated to begin in early 2026.
The major phases of construction and their associated control measures are listed in the following table.
Clearing
and
Grubbing
Rough
Grading
Utility
Installation
Building
Construction
Curb and
Gutter
Construction
Paving Fine
Grading
Permanent
Landscaping
Dust Control
Concrete and Masonry
Washout Area
Good Housekeeping
Silt Fence
Inlet Protection
Vehicle Tracking
Control
Stabilized Staging Area
Street Sweeping
Temporary Batch Plant
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Extent of Disturbance
The total area of the site is ±35.6 acres. Construction of this project will account for disturbed and
impervious areas as shown in the table below.
Total Disturbed Area (ac) 35.6
Pre-Construction Impervious Area (ac) 3.50
Post-Construction Impervious Area (ac) 31.5
Total new Impervious Area (ac) 28.0
Soils
The NRCS Web Soil Survey of Larimer County, Colorado indicates site soils to be Ascalon Sandy Loam,
and Garrett Loam Hydrologic Soil Type B. The soil texture on the site is predominantly loam. Refer to
Appendix A for the soil survey information. Group B soils are moderately susceptible to erosion.
Pre-Project Vegetation
In the pre-project condition, the site exists as vacant land with native grasses throughout (95% vegetative
cover). Vegetative cover was determined by visual site observation.
Potential Pollution Sources
During construction there is potential for pollution from grading, utility, roadway, and building construction
activities. These activities include ground disturbance, refueling and maintenance of equipment, washing
of equipment, concrete waste, and the on-site use of paints, solvents, and other chemicals required for
construction. Additionally, there is potential for pollution from the concrete and masonry washout area(s),
temporary batch plant, worker’s trash and portable toilets. Requirements for locations of potential
pollution sources are included in Section IV – Stormwater Management Controls. Locations of potential
pollution sources will be shown and updated on the Site Maps by the Qualified Stormwater Manager
(QSM). The QSM is also responsible for adhering to the Spill Prevention and Control Plan included in
Appendix E of this plan.
Non-Stormwater Discharges
Based on current information, the only non-stormwater discharges anticipated are landscape irrigation
return flow, emergency firefighting activities, discharge to the ground of concrete and masonry washout
water, and construction dewatering activities.
A designated contained concrete and masonry washout area is located on the Site Map; infiltration
discharge of concrete and masonry washout water from washing of tools and concrete and masonry
mixer chutes may be discharged on this construction site provided that control measures in accordance
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with Part I.B.1.a.ii.(b) of the Colorado General Permit for Stormwater Discharges Associated with
Construction Activity are installed to prevent pollution of groundwater and discharges do not leave the site
as surface runoff or reach receiving waters as defined by the Colorado General Permit for Stormwater
Discharges Associated with Construction Activity. On-site waste disposal of concrete is not authorized by
the Colorado General Permit for Stormwater Discharges Associated with Construction Activity .
If landscape irrigation is to be installed, then potential return flow from the irrigation system must be
documented.
Discharges from diversions of state waters within the permitted site.
Emergency firefighting activities that may occur on the site during active emergency response are
permissible under the Colorado General Permit for Stormwater Discharges Associated with Construction
Activity.
If low risk discharges including potable water monitoring devices, potable water snowmelt, or
uncontaminated groundwater to land occur, they must be discharged in accordance with the CDPHE Low
Risk Discharge policies.
The following discharges are NOT allowable discharges under the state permit . Permittees may seek
individual or alternate general permit coverage for these discharges, as appropriate and available.
• Water from external building washdown (regardless of whether soaps and/or solvents are used);
• Vehicle and equipment washing (regardless of whether soaps and/or solvents are used);
• Discharges from washout water that contain paints, oils, curing compounds, etc.;
• Discharges of fuels or and/or oils;
• Discharges from paved surfaces where High Polyaromatic Hydrocarbon (PAH) Sealant is applied;
• Discharges of reclaimed water approved for use in dust suppression ; and
• Chemical additions to water of any kind.
Receiving Waters
The project area will drain to three (3) detention ponds located on the property. From the detention ponds
the discharge generated by the site will be routed to the Cooper Slough and from there discharge into the
Cache La Poudre River which is the ultimate receiving water. The proposed detention ponds will provide
water quality and detention for the entire site.
The receiving water is not defined as a Colorado Outstanding Water.
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Because wetlands were not found on or around the site, construction is not anticipated to have any
negative affect on wetlands.
Since this property is currently zoned for commercial business district uses and has no historic
designations, historic properties will not be encountered and will not place additional restrictions on
stormwater.
III. Site Map
Vicinity Map
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IV. Stormwater Management Controls
Qualified Stormwater Manager
The Qualified Stormwater Manager (QSM) is an individual knowledgeable in the principles and practices
of erosion and sediment control and pollution prevention and has the skills to assess conditions at
construction sites that could impact stormwater quality and to assess the effectiveness of stormwater
controls implemented to meet the requirements of the CDPS General Permit. The Permittee(s) is
responsible for ensuring that the inspector is a qualified stormwater manager. The Permittee(s) shall
designate a QSM who will be the contact for all SWMP related issues and the person responsible for its
accuracy, completeness, and implementation. The QSM should be a person with authority to adequately
manage and direct day-to-day stormwater quality management activities at the site.
The QSM is responsible for holding a weekly stormwater meeting attended by the Permittee(s) with all
contractors and subcontractors involved in ground-disturbing activities to review the requirements of the
Permit(s), the SWMP, and address any problems that have arisen in implementing the SWMP or
maintaining the BMPs. The QSM shall maintain a log of all weekly meetings and document the issues
addressed in the meetings.
The name and contact information for the Qualified Stormwater Manager is:
Name: TBD Phone:
Other Permits
Other applicable permits include: N/A
Potential Pollutant Sources
Potential pollutant sources for this site include:
Disturbed and Stored Soils – The entire site will be grubbed and overlot graded prior to major utility and
roadway construction. This will be a one-time activity and should be completed relatively early in the
project timeline. The areas of grading that will not require additional disturbance shall receive final
landscaping within 7 days. Otherwise temporary seeding and mulching will be required within 7 days of
last disturbance if no further disturbance is anticipated for at least 14 days. Any soil stockpiles utilized
during construction will be covered with a tarpaulin when not in active use and will have silt fence installed
along the base of the slope.
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Construction Vehicle Entrance and Vehicle Tracking of Sediments – There is potential for tracking of
soils between the beginning of the grading process and the final stabilization of the site. Construction
vehicle entrances shall be minimized to reduce the potential for tracking of soils off -site and vehicle
tracking control shall be installed at each construction entrance. Vehicle tracking control is to be installed
prior to land disturbance activities and sweeping is to take place as needed. Vehicle access to the
exposed and disturbed subgrade will be limited primarily to roll on/off earthmoving equipment and heavy
materials delivery trucks. The QSM is responsible for ensuring that access to exposed subgrade is
limited, both in quantity and in timing relative to the tracking susceptibility of the soil as it relates to
moisture content. The QSM must keep the adjacent parking areas and public rights -of-way free from mud
and other tracked debris from the site.
Management of Contaminated Soils – Contaminated soils are not anticipated based on due diligence
conducted for the project site. If suspect soils are encountered construction activity shall immediately halt
and environmental professionals shall review the materials and provide recommendations on handling of
materials. All handling of materials shall be in accordance with State and Federal regulations. The
SWMP shall be updated and control measures installed to manage the potential new source of pollution.
Loading and Unloading Operations – Loading and unloading operations are expected during demolition
and during the delivery and staging of materials and equipment. Additionally, imported materials may be
necessary to achieve final grades. All loading and unloading operations of equipment shall be
accomplished in areas protected by erosion and sediment controls. It is recommended that all equipment
be cleaned on-site and within protected areas prior to exiting the site.
Outdoor Storage Activities – Outdoor storage is anticipated during construction activities including
delivery and staging of materials. Potential chemicals include paint, fuel, oil, form oil, hydraulic fluid,
plumbing glue, and fertilizer. Outdoor storage activities shall be limited to the designated stabilized
staging area. All stored chemicals require protection from the elements and must be stored off the
ground in some manner. An emergency spill kit is required to be in proximity of any stored chemicals and
hazardous materials. The kit at a minimum would have a broom, chemical absorbent, shovel, and turn
pallets. Good housekeeping practices shall be employed to prevent pollution associated with solid, liquid,
and hazardous construction-related materials and wastes. Secondary containment (or equivalent
protection) is required for individual containers 55 gallons or greater of petroleum products, chemicals, or
solvents to contain spills and reduce the likelihood of contamination of State Waters and Waters of the
United States. Spills and leaks must be minimized. Upon identification, spills and leaks must
immediately be contained and mitigated. The QSM shall show storage locations on the site maps and
update them as needed.
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Fueling of Vehicles and Equipment – Vehicle and equipment fueling shall occur within the stabilized
staging area. Fueling is expected to occur during all phases of construc tion activity. Under no
circumstances shall fueling take place within 200 feet of any State Waters or Waters of the United States
or within 50 feet of an inlet or ditch. Spill response kits shall be readily available an accessible at
locations where fueling takes place. Please refer to the Hazardous Material Management and Spill
Reporting Plan section for information on clean-up and disposal of spills.
Temporary on-site fuel tanks for construction vehicles shall meet all state and federal regulations. Tanks
shall have approved spill containment with the capacity required by the applicable regulations. From
NFPA 30: All tanks shall be provided with secondary containment (i.e. containment external to and
separate from primary containment). Secondary containment shall be constructed of materials of
sufficient thickness, density, and composition so as not to be structurally weakened as a result of contact
with the fuel stored and capable of containing discharged fuel for a period of time equal to or longer than
the maximum anticipated time sufficient to allow recovery of discharged fuel. It shall be capable of
containing 110% of the volume of the primary tank if a single tank is used, or in the case of multiple tanks,
150% of the largest tank or 10% of the aggregate, whichever is larger.
The tanks shall be in sound condition free of rust or other damage which might compromise containment.
Fuel storage areas will meet all EPA, OSHA and other regulatory requirements for signage, fire
extinguisher, etc. Hoses, valves, fittings, caps, filler nozzles, and associated hardware shall be
maintained in proper working condition at all times. The location of fuel tanks shall be shown on the Site
Maps and shall be located to minimize exposure to weather and surface water drainage features.
A Spill Prevention and Control (SPCP) Plan has been included in Appendix E.
Maintenance of Vehicles and Equipment – If equipment is to be maintained and stored in an open area
this area should not be within the drip line of trees and not be within 100 feet of a watercourse or wetland.
Runoff should be diverted away from watercourses and wetlands. Maintenance should be done on
impervious areas surrounded with impervious berms. Where this is not possible, use pads designed to
contain the pollutants which may leak or spill during maintenance operations. Impervious pads are
particularly important on sandy and other course soils where spilled materials can easily leach into the
groundwater. Equipment shall be checked before and after each use and, minimally, during the weekly
stormwater inspection if otherwise idle. Periodic checks of the equipment wash areas shall be performed
to ensure proper operation.
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Hazardous Material Management and Spill Reporting Plan – Any hazardous or potentially hazardous
material that is brought onto the construction site will be handled properly in order to reduce the potential
for storm water pollution. All materials used on this construction site will be properly stored including the
use of secondary containment measures, handled, dispensed and disposed of following all applicable
label directions. Flammable and combustible liquids will be stored and handled according to 29 CFR
1926.152. Only approved containers and portable tanks shall be used for storage and handling of
flammable and combustible liquids.
Material Safety Data Sheets (MSDS) information will be kept on site for any and all applicable materials.
In the event of an accidental spill, immediate action will be undertaken by the General Contractor to
contain and remove the spilled material. All hazardous materials will be disposed of by the Contractor in
the manner specified by federal, state and local regulations and by the manufacturer of such products.
As soon as possible, the spill will be reported to the appropriate agencies. As required under the
provisions of the Clean Water Act, any spill or discharge entering waters of the United States will be
properly reported. The General Contractor will prepare a written record of all spills and associated clean-
up and will provide also notify the City of Fort Collins (970-221-6605) and Larimer County (970-498-
7000). The General Contractor will provide notice to Owner immediately upon identification of a
reportable spill.
Any spills of petroleum products or hazardous materials in excess of Reportable Quantities as defined by
EPA or the state or local agency regulations, shall be immediately reported to the EPA National
Response Center (1-800-424-8802), the Colorado Department of Public Health and Environment
(CDPHE) (1-877-518-5608), the City of Fort Collins (970-221-6605) and Larimer County (970-498-7000).
The State reportable quantity for petroleum products is 25 gallons or more (or that cause a sheen on
nearby surface waters). Spills from regulated aboveground and underground fuel storage tanks must be
reported to the State Oil Inspector within 24 hours (after-hours contact CDPHE Emergency Spill
Reporting Line). This includes spills from fuel pumps. Spills or releases of hazardous substances from
regulated storage tanks in excess of the reportable quantity (40 CFR Part 302.6) must be reported to the
National Response Center, the local fire authority immediately, the State Oil Inspector, the City of Fort
Collins (970-221-6605) and Larimer County (970-498-7000). within 24 hours.
The reportable quantity for hazardous materials can be found in 40 CFR 302 at:
http://www.ecfr.gov/cgi-bin/text-idx?tpl=/ecfrbrowse/Title40/40cfr302_main_02.tpl
In order to minimize the potential for a spill of petroleum product or hazardous materials to come in
contact with storm water, the following steps will be implemented:
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a) All materials with hazardous properties (such as pesticides, petroleum products, fertilizers,
detergents, construction chemicals, acids, paints, paint solvents, additives for soil stabilization,
concrete, curing compounds and additives, etc.) will be stored including secondary containment
measures in a secure location, under cover, when not in use.
b) The minimum practical quantity of all such materials will be kept on the job site and scheduled for
delivery as close to time of use as practical.
c) A spill control and containment kit (containing for example, absorbent material such as kitty litter
or sawdust, acid neutralizing agent, brooms, dust pans, mops, rags, gloves, goggles, plastic and
metal trash containers, etc.) will be provided on the construction site and location(s) shown on
Site Maps. The kit should be inspected for completeness as a part of weekly stormwater
inspections.
d) All of the product in a container will be used before the container is disposed of. All such
containers will be triple rinsed with water prior to disposal. The rinse water used in these
containers will be disposed of in a manner in compliance with state and federal regulations and
will not be allowed to mix with storm water discharges.
e) All products will be stored in and used from the original container with the original product label.
f) All products will be used in strict compliance with instructions on the product label.
g) The disposal of excess or used products will be in strict compliance with instructions on the
products label and local regulations.
The contractor is responsible for the Spill Prevention and Control Plan (SPCP) included in Appendix D of
the SWMP. If the contractor elects to provide his own SPCP it must be included in Appendix D as a
replacement. A contractor provided SPCP shall clearly state measures to stop the source of a spill,
contain the spill, clean up the spill, dispose of contaminated materials, and train personnel to prevent and
control future spills. In addition, the SPCP must include contact and documentation requirements for
each of the Minor, Significant, and Hazardous spill magnitudes. Further requirements are listed below in
the equipment fueling section.
Significant Dust or Particulate Generating Processes – Dust and airborne particulates can be
expected during clearing and grubbing, site grading, saw cutting, and final stabilization activities. On
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areas of exposed soil, minimize dust through the appropriate application of water or other dust
suppression techniques. Water application must be conducted in a manner to prevent discharge offsite.
Dust mitigation shall be implemented as necessary.
Routine Maintenance Activities Involving Chemicals, Detergents, Fuels, Solvents, Oils, etc. – On-
site routine maintenance activities involving fertilizers, pesticides, detergents, fuels, solvents, oils, etc.
shall occur within the stabilized staging area when possible and shall be kept to a minimum. Routine
maintenance activities are expected to occur during all phases of construction activity. The QSM shall
show storage locations on the appropriate plan sheets and update them as needed. All chemicals are to
be protected from the elements. Spill response kits shall be readily available an accessible at locations
where maintenance takes place. Please refer to the Hazardous Material Management and Spill
Reporting Plan section for information on clean-up and disposal of spills.
On-Site Waste Management – Waste generation is expected as a result of construction activities. All
waste shall be properly stored and disposed of to minimize the potential for pollution of stormwater or
snowmelt runoff. Additionally, on-site waste should be stored such that wind will not transport refuse
away from the storage area. This may include the use of storage containers, dumpsters, fencing or
covers.
Concrete Truck/Equipment Washing (including truck chute and associated fixtures and
equipment) – Concrete washout area shall be installed prior to any concrete placement on site. Signs
shall be placed at the construction entrance(s), at the washout area, and elsewhere as necessary to
clearly indicate the location of the concrete washout area. The washout area shall be repaired and
enlarged or cleaned out as necessary to maintain capacity for wasted concrete. Concrete and concrete
wash water shall be removed from the site and disposed of at an accepted waste facility.
Dedicated Asphalt and Concrete Batch Plants – A small temporary batch plant may be installed to
allow on-site storage and mixing of concrete and masonry. This should be protected by sediment traps,
silt fence, drainage swales or other perimeter protection as appropriate to keep stockpiled material within
the plant area and located on the Site Maps by the QSM.
Non-Industrial Waste Management
• Worker’s Trash – The site shall be policed at the end of each work day to be kept free of trash
and debris resulting from workers day to day activities. If necessary, utilize clearly marked and
protected containers for trash and debris at convenient locations throughout the site. Burying of
waste on site is prohibited. Trash must be properly contained at the end of each day.
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• Waste Collection Areas – Locate waste collection areas such as dumpsters away from streets,
gutters, watercourses, and storm drains. Waste collection areas are best located near
construction site entrances to minimize traffic on disturbed soils. Consider secondary
containment around waste collection areas to minimize the likelihood of contaminated discharges.
• Portable Toilets – All personnel involved with construction activities must comply with state and
local sanitary or septic system regulations. Temporary sanitary facilities will be provided at the
site throughout the construction phase. They must be utilized by all construction personnel and
must be serviced weekly by a commercial operator. The location of sanitary facilities shall be
shown on the Site Maps. Portable toilets must be securely anchored a minimum of 10’ behind
curbs and are not allowed within 50’ of inlets or within 50’ of a water of the State or the municipal
storm drain system. Consider secondary containment around portable toilets to minimize the
likelihood of contaminated discharges.
• Concrete and Saw Cutting Waste – Concrete and asphalt cutting are expected during
demolition activities. The waste material from these operations will be fully contained and
cleaned up immediately by vacuum. Any remaining residue shall be cleaned by vacuum or street
sweeping.
Dewatering – Dewatering of excavations shall occur as permitted by a Water Quality Control Division
Low Risk Guidance Document. Any water from dewatering operations shall be uncontaminated and
discharge to a control measure and captured on-site for infiltration and/or evaporation. Under no
circumstances shall construction dewatering water be allowed to leave the site as surface runoff. If
contamination of groundwater is suspected, a separate construction dewatering permit will be required.
Control Measures for Stormwater Pollution Prevention
The following erosion control, sediment control, materials management, and site management measures
shall be utilized and/or installed as indicated on the site maps to reduce the potential of the sources
identified above to contribute pollutants to stormwater discharges.
The following structural control measures are anticipated to be implemented on this site:
BMP Quantity Unit
Temporary Seeding X AC
Concrete Washout Area X EA
Soil Stockpile X CY
Silt Fence X LF
Straw Wattle/Sediment Control Logs X LF
Storm Sewer Inlet Protection X EA
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Sediment Basin X EA
Construction Fence X LF
Vehicle Tracking Control X SY
Stabilized Staging Area X SY
Outlet Protection X EA
Wattle Dike X EA
Rough Cut Street Control X LF
Site maps and control details can be found in Appendix B of this document.
Erosion Control
Temporary and Permanent Seeding – All denuded areas that will be inactive for 14 days or more must
be stabilized temporarily with the use of fast-germinating annual grass/grain varieties appropriate for site
soil and climate conditions, straw/hay mulch, wood cellulose fibers, tackifiers, netting and/or blankets.
Stockpiles and drainage swales/berms must be stabilized to prevent erosion and dust issues. A native
seed mix shall be used. All areas at final grade must be seeded or sodded within 14 days after
completion of work in that area. Prepare soil and seed immediately after final grade is achieved. At the
completion of ground-disturbing activities the entire site must have permanent vegetative cover, meeting
vegetative cover requirements, or mulch per landscape plan, in all areas not covered by hardscape
(pavement, buildings, etc.). Except for small (<100 SF) level spots, seeded areas should be protected
with mulch, tackifier, or a rolled erosion control product. Mulch must be crimped by disc or other
machinery.
Temporary Outlet Protection – Permanent or temporary outlet protection helps to reduce erosion
immediately downstream of a pipe, culvert, slope drain, rundown or other conveyance with concentrated,
high-velocity flows. Typical outlet protection consists of an energy dissipater such as riprap or rock
aprons at the conveyance outlet. Their main purpose is to reduce the speed of concentrated flows to
prevent scour at conveyance outlets. Outlet protection shall be designed to handle runoff from the largest
drainage area that may be contributing runoff during construction. Rock shall be keyed to a minimum
depth of 6 inches for stability around the entire perimeter of the apron. Additional erosion control
measures such as vegetative lining, turf reinforcement mat, and/or other channel lining methods may be
required downstream of the outlet protection if the channel is susceptible to erosion. Outlet protection
shall be installed prior to the start of earth moving operations and remain in place until the conveyance no
longer poses a risk for erosion.
Rough Cut Street Control – Rough cut street controls are rock or earthen berms placed along dirt
roadways that are under construction or used for construction access. These temporary berms intercept
sheet flow and divert runoff from the roadway, and control erosion by minimizing concentration of flow
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and reducing runoff velocity. Rough cut street controls may be used on temporary dirt construction
roadways that have not received road base or roadways under construction that will not be paved within
14 days of final grading and that have not received road base. Barriers shall be installed perpendicular to
the longitudinal slope from the outer edge of the roadside swale to the crown of the road. Barriers shall
be positioned alternately from the right and left side of the road to allow construction traffic to pass in the
lane not barred. Rough cut street controls may be omitted for 400 feet from the entrance if congested
construction traffic is expected. Runoff from the controls should be directed to another stormwater control
measure such as a roadside with check dams once removed from the roadway. Rough cut street
controls shall be installed once dirt roadways are graded. They shall remain in place until adequate road
base and/or pavement is installed on the roadways.
Earth Dikes and Drainage Swales – Drainage swales are temporary storm conveyance channels
constructed either to divert runoff around slopes or to convey runoff to additional sediment control
measures prior to discharge of runoff from a site. Drainage swales must be lined using riprap, plastic or
erosion control blankets and are usually used in conjunction with check dams for slowing flow velocities.
Materials Management
Concrete and Masonry Washout Area – The concrete washout area shall be installed prior to any
concrete placement on site. Signs shall be placed at the construction entrance(s), at the washout area,
and elsewhere as necessary to clearly indicate the location of the concrete washout area. The washout
area shall be repaired and enlarged or cleaned out as necessary to maintain capacity for wasted
concrete. Concrete shall be removed from the site and disposed of at an accepted waste facility. The
concrete washout area shall be installed as shown on site maps prior to any concrete work. It shall
remain in place until all concrete work is complete. Discharges that may reach groundwater must flow
through soil that has buffering capacity prior to reaching groundwater, as necessary to meet the effluent
limits in the Colorado General Permit for Stormwater Discharges Associated with Construction . The
concrete washout area shall not be located in an area where shallow groundwater may be present, such
as near natural drainages, springs, or wetlands.
Stockpile Management – Stockpile management includes measures to minimize erosion and sediment
transport from soil stockpiles. Soil stockpiles shall be located away from all drainage system components
including inlets. When practical, choose stockpile locations that will remain undisturbed for the longest
period of time as the phases of construction progress. Place sediment control measures such as silt
fence, straw wattles, or rock socks around the perimeter of all stockpiles. For stockpiles in active use,
provide a stabilized designated access point on the upgradient side of the stockpile. Soils stockpiled for
more than 60 days should be seeded and mulched with a temporary grass cover. Soil stockpile
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management shall be installed when soil stockpiling begins. It shall remain in place until all soil has been
replaced or hauled off-site to a permanent location.
Good Housekeeping Practices – A clean and orderly work site reduces the possibility of accidental
spills and reduces safety hazards to employees and subcontractors. It will also help minimize potential
contamination of stormwater runoff. Housekeeping practices are to include providing waste
management, establishing proper building material staging areas, designating paint and concrete
washout areas, establishing proper equipment and vehicle fueling and maintenance practices, controlling
equipment and vehicle washing and allowable non-stormwater discharges, and developing a spill
prevention and response plan. Good housekeeping practices shall be employed throughout the duration
of construction.
Sediment Control
Silt Fence – Silt fence is a synthetic permeable woven or non-woven geotextile fabric incorporating
support stakes at intervals sufficient to support the fence (5-feet maximum distance between posts),
water, and sediment retained by the fence. The fence is designed to retain sediment -laden storm water
and allow settlement of suspended soils before the storm water flows through the fabric and discharges
off-site. Silt fence shall be located on the contour to capture overland, low -velocity sheet flows. Silt fence
shall be installed at the start of construction prior to any earth moving activities. Silt fence shall remain in
place until site construction has been completed to a point where other control measures can control the
remaining sediment concerns.
Straw Wattles or Sediment Control Logs – Straw waddles or sediment control logs consist of straw,
compost, excelsior, or coconut fiber and are staked to the ground to prevent sediment transfer. The
waddles are designed to retain sediment-laden storm water and allow settlement of suspended soils
before the storm water flows through the waddle and discharges off-site. Straw waddles shall be located
on the contour to capture overland, low-velocity sheet flows. Straw wattles shall be installed as needed
as construction proceeds to prevent sediment transport (e.g. at top back of curb and gutter, at edge of
sidewalk). Straw wattles shall remain in place until final stabilization.
Storm Sewer Inlet Protection – Inlet protection devices intercept and/or filter sediment before it can be
transported from a site into the storm drain system and discharged into a lake, river, stream, wetland, or
other body of water. These devices also keep sediment from filling or clogging storm drain pipes, ditches,
and downgradient sediment traps or ponds. Inlet protection may also include placement of a barrier to
create a bypass of an inlet transferring flow downstream to a sediment trap, basin, or o ther inlet
discharging to a non-critical area. The primary mechanism is to place controls in the path of flow
sufficient to slow the sediment-laden water to allow settlement of suspended soils before discharging into
Galloway & Company, Inc. Page 20 of 34
the storm sewer. It is possible that as construction progresses from storm sewer installation through to
paving that the inlet protection devices should change. All inlet protection devices create ponding of
storm water. This should be taken into consideration when deciding on which device or devices should
be used. Inlet protection shall be installed around all existing inlets at the start of construction prior to any
earth moving activities and around all proposed inlets as they are constructed. Inlet protection shall
remain in place until final stabilization (pavement and/or landscaping).
Sediment Basin – Sediment basins are temporary ponds built to capture storm runoff and sediment prior
to discharge from the site. These are designed to capture site runoff and slowly release it to allow time for
settling of sediment prior to discharge. Sediment basins shall be installed at the start of construction and
remain in place until it is converted to the permanent detention basin towards the end of site construction .
Design data for sediment basins are included in Appendix B of this report.
Site Management and Other Practices
Construction Phasing and Scheduling – Effective construction site management to minimize erosion
and sediment transport includes attention to construction phasing, scheduling, and sequencing of land
disturbing activities. On most construction projects, erosion and sediment controls will need to be
adjusted as the project progresses and should be documented in the SWMP. All construction projects
can benefit from upfront planning to phase and sequence construction activities to minimize the extent
and duration of disturbance. Larger projects and linear construction projects may benefit most from
construction sequencing or phasing, but even small projects can benefit from construction sequencing
that minimizes the duration of disturbance. Typically, erosion and sediment controls needed at a site will
change as a site progresses through the major phases of construction. Erosion and sediment control
practices corresponding to each phase of construction must be documented in the SWMP.
Vehicle Tracking Control – Vehicles leaving construction sites can track sediment onto adjoining
roadways. This sediment can create safety hazards and contribute significantly to sediment pollution in
waterways. The purpose of a vehicle tracking control measure is to prevent soil and mud on work
vehicles from being carried offsite and deposited on public roads, parking lots, and other areas. All points
closed to the general public and providing access into the construction site shall include a marked
construction exit with structural and nonstructural vehicle tracking controls. This may include tracking
pads, minimizing site access, wash racks, graveled parking areas, maintaining vehicle traffic to paved
areas, street sweeping, and sediment control measures . If a wheel wash system is installed, a sediment
trap control must be installed to treat the wash water before it discharges from the site. Discharge must
be directed to the sediment basin or sediment trap within the limits of construction as indicated. Vehicle
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tracking controls shall be installed at all construction access points at the start of construction prior to any
earth moving activities. They shall remain in place until permanent pavement is installed.
Stabilized Construction Roadway – A stabilized construction roadway is a temporary method to control
sediment runoff, vehicle tracking, and dust from roads during construction activities. When a construction
roadway is expected to have frequent construction traffic it is advisable to install a stabilized construction
roadway instead of rough-cut street controls. The road surface shall be stabilized with an aggregate base
course of 3-inch diameter granular material. Roadside ditches shall also be stabilized if applicable. Early
application of road base is typically suitable in place of the coarse aggregate specified above.
Stabilized Staging Area – This is a clearly designated area where construction equipment and vehicles,
stockpiles, waste bins, and other construction-related materials are stored. The stabilized storage area
consists of a stabilized surface, covered with 3-inch diameter aggregate or larger. The stabilized staging
area shall be installed as shown on the site maps at the start of construction prior to any earth moving
activities. It shall remain in place until permanent pavement is installed.
Temporary Batch Plant Management – Temporary batch plant management includes implementing
multiple control measures such as perimeter controls, concrete washout area, stabilized construction
access, good housekeeping, and other practices designed to reduce polluted runoff from the batch plant
area.
Offsite Control Measures
The SWMP must include a documented use agreement between the Permittee and the Owner or
Operator of any control measures located outside of the permitted area that are utilized by the Permittee’s
construction site for compliance with this permit, but are not under the direct control of the Permittee. The
Permittee is responsible for ensuring that all control measures located outside of their permitted area, that
are being utilized by the Permittee’s construction site, are properly maintained and in compliance with all
terms and conditions of the permit. No offsite control measures are anticipated with this development.
Revising Control Measures and the SWMP
Should there be changes to the implemented control measures the QSM shall be notified and the SWMP
modified to accurately reflect the field conditions. Examples include, but are not limited to, removal of
control measures, identification of new potential pollutant sources, addition of control measures,
modification of control measure installation and implementation criteria or maintenance procedures, and
changes in items included in the Site Map and/or description. SWMP revisions must be made prior to
changes in site conditions, except for Responsive SWMP Changes, as follows:
Galloway & Company, Inc. Page 22 of 34
• SWMP revisions must be made immediately after changes are made in the field to address
control measure installation and/or implementation issues; or
• SWMP revisions that require the development of supporting documentation (e.g. design of
sediment basin capacity) must be made as soon as practicable, but in no case more than 72
hours, after change(s) in control measure installation and/or implementation occur at the site.
Notation must be included in the plan that identifies:
• The date of the site change
• The control measure removed or modified
• The location(s) of those control measure(s)
• Any changes to the control measure(s)
This SWMP should be viewed as a “living document” that is to be continuously reviewed and modified as
part of the overall process of assessing and managing stormwater quality issues on-site.
Permit Renewal
The duration of the permit is for a fixed term not exceeding five (5) years. If the Permittee desires to
continue discharge beyond the original permit terms, a permit renewal application shall be submitted at
least one hundred eighty (180) calendar days before this permit expires. The permit’s duration may be
extended only through administrative extensions and not through interim modifications. Any
noncompliance with the original permit constitutes a violation of the Colorado Water Quality Control Act
and may be grounds for denial of a permit renewal application.
V. Final Stabilization & Long-Term Stormwater Management
Permanent stabilization of the site will include establishment of native seeded areas in the right-of-way
and overlot graded areas with a native seed mix, permanent landscaping areas, and pavement
placement. The Permittee shall minimize soil compaction in areas where infiltration control measures are
implemented or where final stabilization will be achieved through vegetative cover . Final site stabilization
is achieved when the following are complete:
• All construction activities are complete.
• Permanent stabilization methods are complete. Permanent stabilization methods include, but are
not limited to, permanent pavement or concrete, hardscape, xeriscape, stabilized driving
surfaces, vegetative cover, or equivalent alternative stabilization methods. Vegetative cover must
mee the following criteria:
Evenly distributed perennial vegetation, and
Galloway & Company, Inc. Page 23 of 34
Coverage, at a minimum, equal to 70% of what would have been provided by native
vegetation in a local, undisturbed are or adequate reference site.
• The permittee must ensure all temporary control measures are removed from the construction
site once final stabilization is achieved, except when the control measure specifications allow the
control measure to be left in place (e.g. biodegradable control measures , permanent sediment
basin).
• Reference the Bloom Filing 9 approved landscape plans for native seed mix and planting method
information
• Soil preparation for all areas requiring planting and seeding is to be in accordance with City of
Fort Collins Municipal code section 12-132:
Sec. 12-132. - Soil Loosening and Amendment Requirements.
(a)Applicability. The requirements of this Division shall apply to any property outside of a Natural
Habitat Buffer Zone defined in the Land Use Code that:
(1)Is included any development review process under the Land Use Code and has over one
thousand (1,000) square feet of area where plant materials will be installed; or
(2)Requires a building permit that is associated with a certificate of occupancy and has over one
thousand (1,000) square feet of area where plant materials will be installed.
(b)Soil Loosening Standards. Except as provided in this subsection (b) or pursuant to § 12-134, in
any location where plant materials are expected or intended to be installed, soils shall be
thoroughly loosened to a depth of at least eight (8) inches, except as follows:
(1)In areas where new tree plantings are expected or intended to occur, the soil shall be loosened
to the extent of, roughly two (2) to three (3) times the diameter of the planted root ball and
minimum of six (6) feet extending radially from the tree trunk and loosened to a depth equivalent
to the root ball;
(2)Soil shall not be loosened within a certain distance from the face of existing trees based on the
tree trunk's diameter at breast height as set forth in the following table; and
(3)In any areas where existing vegetation remains and was not compacted or disturbed from
construction or related activities, the soil shall only be loosened with an aeration or no -till method.
(c)Soil Amendment Standards.
(1)Except as provided in this subsection (c) or pursuant to § 12 -134, in any location where plant
materials are expected or intended to be installed, the soil shall be amended at a rate of at least
Galloway & Company, Inc. Page 24 of 34
three (3) cubic yards of soil amendment over one thousand (1,000) square feet, which shall be
well mixed into the top four (4) inches of the soil.
(2)Soils amendments shall not be required for the following:
a. In areas where new or existing trees are located, and no other vegetation will be under the tree
canopy;
b. In areas where Low Impact Development stormwater quality infrastructure is located; or
c. Existing soils that are topsoil, as proven by soil testing. Such topsoil may be stripped and
stored using Topsoil Stockpiling Practices for reapplication to the site. When reapplied, at least
four (4) inches of reclaimed topsoil shall be applied.
(Ord. No. 007, 2025, 2-4-25)
Inactivation of Permit Coverage
Once the criteria for final stabilization have been met, the Permittee shall make a request to terminate the
permit through the Colorado Environmental Online Services (CEOS) system . If final stabilization is
achieved in advance of the expiration date of the permit, the Division shall be promptly notified so the
permit can be terminated.
The QSM shall provide a completed SWMP binder to the owner at the conclusion of the project which will
include the original SWMP, all markups or other changes to the SWMP, and inspection and maintenance
records. The owner shall keep this document on file for a minimum of 3 years after construction
completion.
VI. Inspection & Maintenance Procedures
The contractor must keep the approved SWMP on site at all times. The person(s) inspecting the site may
be on the Permittee’s staff or a third party hired to conduct stormwater inspections under the direction of
the Permittee. The Permittee is responsible for ensuring that the inspector is a qualified stormwater
manager. All regulatory authorities may inspect the land or site covered by the SWMP at any time, without
prior notice, for compliance with the SWMP. If site conditions indicate that the objectives of this section
are not being met, the operator shall make appropriate modifications to the SWMP. Any modification
must be recorded on the owner’s copy of the SWMP and the QSM notified. The Permittee must maintain
inspection records on site with the SWMP and such records must be provided to the regulatory agencies
for review upon request. At a minimum, the inspection report must include:
i. The inspection date
ii. Name(s) and title(s) of personnel conducting the inspection
iii. Weather conditions at the time of inspection
iv. Phase of construction at the time of inspection
v. Estimated acreage of disturbance at the time of inspection
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vi. Location(s) of and identification of control measures requiring routine maintenance
vii. Location(s) of and identification of discharges of sediment or other pollutants from the site
viii. Location(s) and identification of inadequate control measures
ix. Location(s) and identification of additional control measures needed that were not in place at the
time of inspection.
x. Description of corrective action(s) for items vii, viii, and ix above, dates corrective action(s) were
completed, including requisite changes to the SMP, as necessary.
xi. Description of the minimum inspection frequency (either in accordance with Part I.D.2., I.D.3. or
I.D.4.) utilized when conducting each inspection.
xii. Deviations from the minimum inspection schedule as required in Part I.D.2.
xiii. After adequate corrective action(s) and maintenance have been taken, or where a report does not
identify incidents requiring corrective action or maintenance, the report shall contain a statement
as required in Part I.A.3.f.
The State Construction Stormwater Site Inspection Report template has been included in Appendix D.
The Permittee may provide their own inspection report if desired but must ensure it meets the
requirements above. Any person(s) signing inspection documents required for compliance must make the
following statement and provide the date of the statement:
“I verify that, to the best of my knowledge and belief, that if any corrective action items were identified
during the inspection, those corrective actions are complete, and the site is currently in compliance with
the permit.”
Inspection Schedules
Between the time this SWMP is implemented and final Inactivation Notice or Termination Application has
been submitted, all disturbed areas and pollutant controls must be inspected with one of the following
minimum frequencies:
• At least one inspection every 7 calendar days
• At least one inspection every 14 calendar days, plus post-storm event inspections conducted
within 24 hours after the end of any precipitation or snowmelt event that causes surface erosion.
If more frequent inspections are required to ensure that control measures are properly maintained and
operated, the inspection schedule must be modified to meet this need. The first site inspection must
occur within 7 calendar days of the commencement of construction activities on site. The contractor and
QSM shall adhere to the maintenance schedules listed in the details for each control measure.
Permittees must conduct site inspections at least once every 7 calendar days for sites that discharge to a
water body designated as an Outstanding Water by the Water Quality Control Commission. Preventative
maintenance shall be coupled with periodic inspections.
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Inspection Procedures
The purpose of site inspections is to assess performance of pollutant controls. Based on these
inspections the contractor, in consultation with the QSM (if different) will decide whether it is necessary to
modify this SWMP, add or relocate controls, or revise or implement additional control measures in order
to prevent pollutants from leaving the site via stormwater runoff. The contractor has the duty to cause
pollutant control measures to be repaired, modified, supplemented, or take additional steps as necessary
in order to achieve effective pollutant control. Note: If a control measure is covered by snow, mark the
control measure as not applicable and document the reason the control measure cannot be inspected on
the daily report.
The inspection must include observation of:
• The construction site perimeter and discharge points, including discharges into a storm sewer
system
• All disturbed areas
• Areas used for material/waste storage that are exposed to precipitation
• Areas determined to have a significant potential for stormwater pollution, such as demolition
areas, concrete washout areas, or construction vehicle entrances
• All erosion and sediment control measures identified in the SWMP
• Structural control measures that may require maintenance, such as secondary containment
around fuel tanks or the condition of spill response kits
Examples of specific items to evaluate during site inspections are listed below. This list is not intended to
be comprehensive. During each inspection, the inspector must evaluate overall pollutant control system
performance as well as particular details of individual system components. Additional factors should be
considered as appropriate to the circumstances. Additional information on maintenance requirements
can be found in the BMP Fact Sheets in Volume 3 of the Urban Storm Drainage Criteria Manual by the
Urban Drainage and Flood Control District.
• Construction Exit and Track Out – Locations where vehicles enter and exit the site must be
inspected for evidence of off-site sediment tracking. A stabilized construction exit shall be
constructed where vehicles enter and exit. Exits shall be maintained or supplemented as
necessary to prevent the release of sediment from vehicles leaving the site. Any sediment
deposited on the roadway shall be swept as necessary throughout the day or at the end of every
day and disposed of in an appropriate manner. Sediment shall NOT be washed into storm sewer
systems.
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• Erosion Control Devices – Rolled erosion control products (nets, blankets, turf reinforcement
mats) and marginally vegetated areas (areas not meeting required vegetative densities for final
stabilization) must be inspected weekly. Rilling, rutting and other signs of erosion indicate the
erosion control device is not functioning properly and additional erosion control devices are
warranted.
• Material Storage Areas – Material storage areas should be located to minimize exposure to
weather. Inspections shall evaluate disturbed areas and areas used for storing materials that are
exposed to rainfall for evidence of, or the potential for, pollutants entering the drainage system or
discharging from the site. If necessary, the materials must be covered or original covers must be
repaired or supplemented. Also, protective berms must be constructed, if needed, in order to
contain runoff from material storage areas. All state and local regulations pertaining to material
storage areas will be adhered to.
• Discharge Points – All discharge points must be inspected to determine whether erosion and
sediment control measures are effective in preventing discharge of sediment from the site or
impacts to receiving waters. Stormwater discharges, including both peak flow rates and total
stormwater discharge, shall be controlled to minimize channel and streambank erosion and scour
in the immediate vicinity of discharge points.
Control Measure Maintenance/Replacement and Failed Control Measures
The Colorado General Permit for Stormwater Discharges Associated with Construction Activity requires
that all erosion and sediment control practices and other protective measures identified in the SWMP be
maintained in effective operating condition and in accordance with good engineering, hydrologic and
pollution control practices. Sediment that has been collected by sediment controls, such as silt fence and
inlet protection, shall be removed when observed to prevent failure of control measures, and remove the
potential of that sediment from being discharged from the site if the control measure did fail. Removed
sediment shall be properly disposed of on-site. Maintenance activities to correct problems noted during
inspections must be documented as discussed in the documentation section below. The inspection
process must also include procedures to ensure that, when needed, control measures are replaced or
new control measures added to adequately manage the pollutant sources at the site. The permittee must
take all necessary steps to minimize or prevent the discharge of pollutants from the permitted area and
manage any stormwater run-on onto the site until a control measure is implemented and made
operational and/or an inadequate control measure is replaced or corrected and returned to effective
operating condition in compliance with the Colorado General Permit for Stormwater Discharges
Associated with Construction Activity. This procedure is part of the ongoing process of revising the control
measures and the SWMP as discussed above, and any changes to control measures must be recorded
in the SWMP. The SWMP must be modified as soon as practicable to reflect current conditions. Control
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measures that have failed or have the potential to fail without maintenance or modifications must be
addressed as soon as possible, immediately in most cases, to prevent the discharge of pollutants. If it is
infeasible to install or repair a control measure immediately after discovering the deficiency, the following
information must be documented and kept on record:
1) Describe why it is infeasible to initiate the installation or repair immediately; and
2) Provide a schedule for installing or repairing the control measure and returning it to an effective
operating condition as soon as possible.
If applicable, the Permittee must remove and properly dispose of any unauthorized release or discharge
within and from the permitted area (e.g. discharge of non-stormwater, untreated stormwater containing
pollutants, spill or leak not authorized by the Construction Stormwater Permit). The Permittee must also
clean up any contaminated surfaces, if feasible to minimize discharges of the material in subsequent
storm events, including water remaining form the response that contains pollutants after active
emergency firefighting response is complete.
Record Keeping and Documentation
All erosion control measures and stabilizations shall be inspected weekly and after each precipitation or
snow melt event. The Permittee must document inspection results and maintain a record of the results for
a period of 3 years following closing of permit coverage. These records must be made available to the
Owner, the City & County, the State, or the EPA upon request. The following items must be documented
as part of the site inspections:
• The inspection date
• Name(s) and title(s) of personnel making the inspection
• Location(s) of discharges of sediment or other pollutants from the site
• Location(s) of control measures that need to be maintained
• Location(s) of control measures that failed to operate as designed or proved inadequate for a
particular location
• Location(s) where additional control measures are needed that were not in place at the time of
inspection
• Deviations from the minimum inspection schedule as indicated above
• Description and dates of corrective actions taken including requisite changes to the SWMP
After adequate corrective action(s) has been taken, or where a report does not identify any incidents
requiring corrective action, 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.
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Record of spills, leaks, or overflows that result in the discharge of pollutants must be documented and
maintained. Information that should be recorded for all occurrences includes the time and date, weather
conditions, reasons for the spill, who the spill was reported to, etc.
A complete copy of the SWMP shall be kept with the inspection and maintenance records for the
aforementioned 3-year period.
VII. Conclusion
Conformance with Standards
The Stormwater Management report for Project at Bloom Commercial, was prepared in compliance with
the City of Fort Collins Engineering Code of Standards and Specifications and the Colorado General
Permit for Stormwater Discharges Associated with Construction Activity.
Drainage Concept
The proposed erosion and sediment control measures do not alter the existing and proposed drainage
patterns, volumes, or control points from the submitted Bloom Commercial Drainage Report applicable to
this development.
VIII. References
1. City of Fort Collins Stormwater Criterial Manual – December 2018 Edition, City of Fort
Collins.
2. Urban Storm Drainage Criteria Manual, Volume 3, Urban Drainage and Flood Control District,
revised March 2024.
3. General Permit Application and Stormwater Management Plan Preparation Guidance,
Colorado Department of Public Health and Environment, Revised July 2024.
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Appendix A – Reference Information
NRCS Web Soil Survey Information
FEMA FIRMette
CDPS Attachment A – SWMP Certification
City of Anytown Grading and Erosion Control Permit
Hydrologic Soil Group—Larimer County Area, Colorado
(HFH073 | Bloom Commercial)
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
7/13/2025
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Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS84
0 200 400 800 1200
Feet
0 50 100 200 300
Meters
Map Scale: 1:4,880 if printed on A portrait (8.5" x 11") sheet.
Soil Map may not be valid at this scale.
MAP LEGEND MAP INFORMATION
Area of Interest (AOI)
Area of Interest (AOI)
Soils
Soil Rating Polygons
A
A/D
B
B/D
C
C/D
D
Not rated or not available
Soil Rating Lines
A
A/D
B
B/D
C
C/D
D
Not rated or not available
Soil Rating Points
A
A/D
B
B/D
C
C/D
D
Not rated or not available
Water Features
Streams and Canals
Transportation
Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background
Aerial Photography
The soil surveys that comprise your AOI were mapped at
1:24,000.
Warning: Soil Map may not be valid at this scale.
Enlargement of maps beyond the scale of mapping can cause
misunderstanding of the detail of mapping and accuracy of soil
line placement. The maps do not show the small areas of
contrasting soils that could have been shown at a more detailed
scale.
Please rely on the bar scale on each map sheet for map
measurements.
Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:
Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator
projection, which preserves direction and shape but distorts
distance and area. A projection that preserves area, such as the
Albers equal-area conic projection, should be used if more
accurate calculations of distance or area are required.
This product is generated from the USDA-NRCS certified data as
of the version date(s) listed below.
Soil Survey Area: Larimer County Area, Colorado
Survey Area Data: Version 19, Aug 29, 2024
Soil map units are labeled (as space allows) for map scales
1:50,000 or larger.
Date(s) aerial images were photographed: Jul 2, 2021—Aug 25,
2021
The orthophoto or other base map on which the soil lines were
compiled and digitized probably differs from the background
imagery displayed on these maps. As a result, some minor
shifting of map unit boundaries may be evident.
Hydrologic Soil Group—Larimer County Area, Colorado
(HFH073 | Bloom Commercial)
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
7/13/2025
Page 2 of 4
Hydrologic Soil Group
Map unit symbol Map unit name Rating Acres in AOI Percent of AOI
7 Ascalon sandy loam, 0
to 3 percent slopes
B 25.1 28.8%
35 Fort Collins loam, 0 to 3
percent slopes
C 0.0 0.0%
40 Garrett loam, 0 to 1
percent slopes
B 59.4 68.2%
73 Nunn clay loam, 0 to 1
percent slopes
C 0.0 0.0%
76 Nunn clay loam, wet, 1
to 3 percent slopes
C 1.8 2.1%
94 Satanta loam, 0 to 1
percent slopes
C 0.7 0.8%
Totals for Area of Interest 87.1 100.0%
Hydrologic Soil Group—Larimer County Area, Colorado HFH073 | Bloom Commercial
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
7/13/2025
Page 3 of 4
Description
Hydrologic soil groups are based on estimates of runoff potential. Soils are
assigned to one of four groups according to the rate of water infiltration when the
soils are not protected by vegetation, are thoroughly wet, and receive
precipitation from long-duration storms.
The soils in the United States are assigned to four groups (A, B, C, and D) and
three dual classes (A/D, B/D, and C/D). The groups are defined as follows:
Group A. Soils having a high infiltration rate (low runoff potential) when
thoroughly wet. These consist mainly of deep, well drained to excessively
drained sands or gravelly sands. These soils have a high rate of water
transmission.
Group B. Soils having a moderate infiltration rate when thoroughly wet. These
consist chiefly of moderately deep or deep, moderately well drained or well
drained soils that have moderately fine texture to moderately coarse texture.
These soils have a moderate rate of water transmission.
Group C. Soils having a slow infiltration rate when thoroughly wet. These consist
chiefly of soils having a layer that impedes the downward movement of water or
soils of moderately fine texture or fine texture. These soils have a slow rate of
water transmission.
Group D. Soils having a very slow infiltration rate (high runoff potential) when
thoroughly wet. These consist chiefly of clays that have a high shrink-swell
potential, soils that have a high water table, soils that have a claypan or clay
layer at or near the surface, and soils that are shallow over nearly impervious
material. These soils have a very slow rate of water transmission.
If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is
for drained areas and the second is for undrained areas. Only the soils that in
their natural condition are in group D are assigned to dual classes.
Rating Options
Aggregation Method: Dominant Condition
Component Percent Cutoff: None Specified
Tie-break Rule: Higher
Hydrologic Soil Group—Larimer County Area, Colorado HFH073 | Bloom Commercial
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
7/13/2025
Page 4 of 4
National Flood Hazard Layer FIRMette
0 500 1,000 1,500 2,000250
Feet
Ü
SEE FIS REPORT FOR DETAILED LEGEND AND INDEX MAP FOR FIRM PANEL LAYOUT
SPECIAL FLOOD
HAZARD AREAS
Without Base Flood Elevation (BFE)
Zone A, V, A99
With BFE or Depth Zone AE, AO, AH, VE, AR
Regulatory Floodway
0.2% Annual Chance Flood Hazard, Areas
of 1% annual chance flood with average
depth less than one foot or with drainage
areas of less than one square mile Zone X
Future Conditions 1% Annual
Chance Flood Hazard Zone X
Area with Reduced Flood Risk due to
Levee. See Notes.Zone X
Area with Flood Risk due to Levee Zone D
NO SCREEN Area of Minimal Flood Hazard Zone X
Area of Undetermined Flood Hazard Zone D
Channel, Culvert, or Storm Sewer
Levee, Dike, or Floodwall
Cross Sections with 1% Annual Chance
17.5 Water Surface Elevation
Coastal Transect
Coastal Transect Baseline
Profile Baseline
Hydrographic Feature
Base Flood Elevation Line (BFE)
Effective LOMRs
Limit of Study
Jurisdiction Boundary
Digital Data Available
No Digital Data Available
Unmapped
This map complies with FEMA's standards for the use of
digital flood maps if it is not void as described below.
The basemap shown complies with FEMA's basemap
accuracy standards
The flood hazard information is derived directly from the
authoritative NFHL web services provided by FEMA. This map
was exported on 7/13/2025 at 4:08 PM and does not
reflect changes or amendments subsequent to this date and
time. The NFHL and effective information may change or
become superseded by new data over time.
This map image is void if the one or more of the following map
elements do not appear: basemap imagery, flood zone labels,
legend, scale bar, map creation date, community identifiers,
FIRM panel number, and FIRM effective date. Map images for
unmapped and unmodernized areas cannot be used for
regulatory purposes.
Legend
OTHER AREAS OF
FLOOD HAZARD
OTHER AREAS
GENERAL
STRUCTURES
OTHER
FEATURES
MAP PANELS
8
B 20.2
The pin displayed on the map is an approximate
point selected by the user and does not represent
an authoritative property location.
1:6,000
105°1'21"W 40°35'12"N
105°0'43"W 40°34'45"N
Basemap Imagery Source: USGS National Map 2023
4,514
752.3
HFH073 | Bloom Commercial
This map is a user generated static output from the City of Fort Collins FCMaps
Internet mapping site and is for reference only. Data layers that appear on this
map may or may not be accurate, current, or otherwise reliable.
City of Fort Collins - GIS
572.0
1:
WGS_1984_Web_Mercator_Auxiliary_Sphere
Feet572.00286.00
Notes
Legend
3,430
Street Names
FEMA Floodplain
FEMA High Risk - Floodway
FEMA High Risk - 100 Year
FEMA Moderate Risk - 100 / 500 Year
City Floodplains
City High Risk - Floodway
City High Risk - 100 Year
City Moderate Risk - 100 Year
City Limits
Project: Disturbed Acres*:10.00
EROSION CONTROL BMPs Units
Estimated
Quantity
Unit
Price
Total
Price
L.F.5523 $1.85 $10,217.55
each 14 $75.00 $1,050.00
Outlet Protection each 5 $40.00 $200.00
each 1 $200.00 $200.00
each 4 $700.00 $2,800.00
Sub-Total:$14,467.55
1.5 x Sub-Total:$21,701.33
Amount of security:$21,701.33
Total Acres x Price/acre:$13,500.00
$1,350.00 Sub-Total:$13,500.00
1.5 x Sub-Total:$20,250.00
Amount to Re-seed:$20,250.00
**Pond bottom cost estimate will be provided by Aloterra
Minimum escrow amount:$3,000.00
Erosion Control Escrow:$21,701.33
User Input Fields in BLUE should be amended for this project.
Erosion and Sediment Control Escrow/Security Calculation
Bloom Commercial
BMP Amount
Silt Fence
Curb Inlet Protection
Concrete Washout
Final Escrow Amount
“The amount of the security must be based on one and one-half times the estimate of the cost to install the approved measures, or one
and one-half times the cost to re-vegetate the disturbed land to dry land grasses based upon unit cost determined by the City's Annual
Revegetation and Stabilization Bid, whichever is greater. In no instance, will the amount of security be less than one thousand five
hundred dollars ($1,500) for residential development or three thousand dollars ($3,000) for commercial development”
Vehicle Tracking Control (VTC)
(add all other BMPs for the site in this list)
Re-seeding Amount
Unit Price of Seeding per acre**:
Miniumum Escrow Amount
Galloway & Company, Inc. Page 30 of 33
Appendix B – SWMP Site Maps and Calculations
SWMP Site Maps and Details
Temporary Sediment Basin Capacity Calculations
5235 Ronald Reagan Blvd., Suite 200
Johnstown, CO 80534
970.800.3300 • GallowayUS.com
BLOOM COMMERCIAL
VICINITY MAP
NOT TO SCALE
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BLOOM
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before you dig.
PGS
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OVERALL GRADING PLAN
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AND ARE THE PROPERTY OF GALLOWAY, AND MAY
NOT BE DUPLICATED, DISCLOSED, OR REPRODUCED
WITHOUT THE WRITTEN CONSENT OF GALLOWAY.
COPYRIGHTS AND INFRINGEMENTS WILL BE
ENFORCED AND PROSECUTED.
COPYRIGHT
5235 Ronald Reagan Blvd., Suite 200
Johnstown, CO 80534
970.800.3300
GallowayUS.com
NOT
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#Date Issue / Description Init.
Project No:
Drawn By:
Checked By:
Date:
HFH000073.20
10/01/2025
Sheet of 68
CITY OF GREELEY
Know what's
before you dig.
PGS
JEP
GRADING PLAN
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NOT BE DUPLICATED, DISCLOSED, OR REPRODUCED
WITHOUT THE WRITTEN CONSENT OF GALLOWAY.
COPYRIGHTS AND INFRINGEMENTS WILL BE
ENFORCED AND PROSECUTED.
COPYRIGHT
5235 Ronald Reagan Blvd., Suite 200
Johnstown, CO 80534
970.800.3300
GallowayUS.com
NOT
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#Date Issue / Description Init.
Project No:
Drawn By:
Checked By:
Date:
HFH000073.20
10/01/2025
Sheet of 68
CITY OF GREELEY
Know what's
before you dig.
PGS
JEP
GRADING PLAN
17
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THESE PLANS ARE AN INSTRUMENT OF SERVICE
AND ARE THE PROPERTY OF GALLOWAY, AND MAY
NOT BE DUPLICATED, DISCLOSED, OR REPRODUCED
WITHOUT THE WRITTEN CONSENT OF GALLOWAY.
COPYRIGHTS AND INFRINGEMENTS WILL BE
ENFORCED AND PROSECUTED.
COPYRIGHT
5235 Ronald Reagan Blvd., Suite 200
Johnstown, CO 80534
970.800.3300
GallowayUS.com
NOT
F
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#Date Issue / Description Init.
Project No:
Drawn By:
Checked By:
Date:
HFH000073.20
10/01/2025
Sheet of 68
Know what's
before you dig.
PGS
JEP
GRADING PLAN
18
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THESE PLANS ARE AN INSTRUMENT OF SERVICE
AND ARE THE PROPERTY OF GALLOWAY, AND MAY
NOT BE DUPLICATED, DISCLOSED, OR REPRODUCED
WITHOUT THE WRITTEN CONSENT OF GALLOWAY.
COPYRIGHTS AND INFRINGEMENTS WILL BE
ENFORCED AND PROSECUTED.
COPYRIGHT
5235 Ronald Reagan Blvd., Suite 200
Johnstown, CO 80534
970.800.3300
GallowayUS.com
NOT
F
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CON
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#Date Issue / Description Init.
Project No:
Drawn By:
Checked By:
Date:
HFH000073.20
10/01/2025
Sheet of 68
Know what's
before you dig.
PGS
JEP
GRADING PLAN
19
C3.4
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THESE PLANS ARE AN INSTRUMENT OF SERVICE
AND ARE THE PROPERTY OF GALLOWAY, AND MAY
NOT BE DUPLICATED, DISCLOSED, OR REPRODUCED
WITHOUT THE WRITTEN CONSENT OF GALLOWAY.
COPYRIGHTS AND INFRINGEMENTS WILL BE
ENFORCED AND PROSECUTED.
COPYRIGHT
5235 Ronald Reagan Blvd., Suite 200
Johnstown, CO 80534
970.800.3300
GallowayUS.com
NOT
F
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CON
S
T
R
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I
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N
#Date Issue / Description Init.
Project No:
Drawn By:
Checked By:
Date:
HFH000073.20
10/01/2025
Sheet of 68
Know what's
before you dig.
PGS
JEP
OVERALL EROSION
CONTROL PLAN
20
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THESE PLANS ARE AN INSTRUMENT OF SERVICE
AND ARE THE PROPERTY OF GALLOWAY, AND MAY
NOT BE DUPLICATED, DISCLOSED, OR REPRODUCED
WITHOUT THE WRITTEN CONSENT OF GALLOWAY.
COPYRIGHTS AND INFRINGEMENTS WILL BE
ENFORCED AND PROSECUTED.
COPYRIGHT
5235 Ronald Reagan Blvd., Suite 200
Johnstown, CO 80534
970.800.3300
GallowayUS.com
NOT
F
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R
CON
S
T
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N
#Date Issue / Description Init.
Project No:
Drawn By:
Checked By:
Date:
HFH000073.20
10/01/2025
Sheet of 68
CITY OF GREELEY
LOC
LOC
LOC
CF
CF
CF
SF
SF
SF
Know what's
before you dig.
PGS
JEP
INITIAL EROSION CONTROL
PLAN
21
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V
E
L
O
P
M
E
N
T
P
L
A
N
FO
R
T
C
O
L
L
I
N
S
,
C
O
THESE PLANS ARE AN INSTRUMENT OF SERVICE
AND ARE THE PROPERTY OF GALLOWAY, AND MAY
NOT BE DUPLICATED, DISCLOSED, OR REPRODUCED
WITHOUT THE WRITTEN CONSENT OF GALLOWAY.
COPYRIGHTS AND INFRINGEMENTS WILL BE
ENFORCED AND PROSECUTED.
COPYRIGHT
5235 Ronald Reagan Blvd., Suite 200
Johnstown, CO 80534
970.800.3300
GallowayUS.com
NOT
F
O
R
CON
S
T
R
U
C
T
I
O
N
#Date Issue / Description Init.
Project No:
Drawn By:
Checked By:
Date:
HFH000073.20
10/01/2025
Sheet of 68
CF SF
LOC
LOC
CF
SF
Know what's
before you dig.
PGS
JEP
INITIAL EROSION CONTROL
PLAN
22
C4.2
-
-
-
-
-
-
-
-
-
-
-
-
-
-
H:
\
H
\
H
a
r
t
f
o
r
d
H
o
m
e
s
\
C
O
F
o
r
t
C
o
l
l
i
n
s
H
F
H
7
3
-
B
l
o
o
m
C
o
m
m
e
r
c
i
a
l
\
0
C
I
V
\
3
-
C
D
\
F
D
P
\
H
F
H
0
7
3
_
C
4
.
0
-
I
n
i
t
i
a
l
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r
o
s
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n
C
o
n
t
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o
l
P
l
a
n
F
D
P
.
d
w
g
-
RJ
B
a
r
n
e
s
-
10
/
1
/
2
0
2
5
BL
O
O
M
F
I
L
I
N
G
N
I
N
E
FI
N
A
L
D
E
V
E
L
O
P
M
E
N
T
P
L
A
N
FO
R
T
C
O
L
L
I
N
S
,
C
O
THESE PLANS ARE AN INSTRUMENT OF SERVICE
AND ARE THE PROPERTY OF GALLOWAY, AND MAY
NOT BE DUPLICATED, DISCLOSED, OR REPRODUCED
WITHOUT THE WRITTEN CONSENT OF GALLOWAY.
COPYRIGHTS AND INFRINGEMENTS WILL BE
ENFORCED AND PROSECUTED.
COPYRIGHT
5235 Ronald Reagan Blvd., Suite 200
Johnstown, CO 80534
970.800.3300
GallowayUS.com
NOT
F
O
R
CON
S
T
R
U
C
T
I
O
N
#Date Issue / Description Init.
Project No:
Drawn By:
Checked By:
Date:
HFH000073.20
10/01/2025
Sheet of 68
LOC
LOC
CF
CF
SF
SF
LOC
CF
SF
Know what's
before you dig.
PGS
JEP
INITIAL EROSION CONTROL
PLAN
23
C4.3
-
-
-
-
-
-
-
-
-
-
-
-
-
-
H:
\
H
\
H
a
r
t
f
o
r
d
H
o
m
e
s
\
C
O
F
o
r
t
C
o
l
l
i
n
s
H
F
H
7
3
-
B
l
o
o
m
C
o
m
m
e
r
c
i
a
l
\
0
C
I
V
\
3
-
C
D
\
F
D
P
\
H
F
H
0
7
3
_
C
4
.
0
-
I
n
i
t
i
a
l
E
r
o
s
i
o
n
C
o
n
t
r
o
l
P
l
a
n
F
D
P
.
d
w
g
-
RJ
B
a
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n
e
s
-
10
/
1
/
2
0
2
5
BL
O
O
M
F
I
L
I
N
G
N
I
N
E
FI
N
A
L
D
E
V
E
L
O
P
M
E
N
T
P
L
A
N
FO
R
T
C
O
L
L
I
N
S
,
C
O
THESE PLANS ARE AN INSTRUMENT OF SERVICE
AND ARE THE PROPERTY OF GALLOWAY, AND MAY
NOT BE DUPLICATED, DISCLOSED, OR REPRODUCED
WITHOUT THE WRITTEN CONSENT OF GALLOWAY.
COPYRIGHTS AND INFRINGEMENTS WILL BE
ENFORCED AND PROSECUTED.
COPYRIGHT
5235 Ronald Reagan Blvd., Suite 200
Johnstown, CO 80534
970.800.3300
GallowayUS.com
NOT
F
O
R
CON
S
T
R
U
C
T
I
O
N
#Date Issue / Description Init.
Project No:
Drawn By:
Checked By:
Date:
HFH000073.20
10/01/2025
Sheet of 68
LOC
LOCLOC
CF
CFCF
SF
SFSF
LOC
CF
SF
Know what's
before you dig.
PGS
JEP
INITIAL EROSION CONTROL
PLAN
24
C4.4
-
-
-
-
-
-
-
-
-
-
-
-
-
-
H:
\
H
\
H
a
r
t
f
o
r
d
H
o
m
e
s
\
C
O
F
o
r
t
C
o
l
l
i
n
s
H
F
H
7
3
-
B
l
o
o
m
C
o
m
m
e
r
c
i
a
l
\
0
C
I
V
\
3
-
C
D
\
F
D
P
\
H
F
H
0
7
3
_
C
4
.
0
-
I
n
i
t
i
a
l
E
r
o
s
i
o
n
C
o
n
t
r
o
l
P
l
a
n
F
D
P
.
d
w
g
-
RJ
B
a
r
n
e
s
-
10
/
1
/
2
0
2
5
BL
O
O
M
F
I
L
I
N
G
N
I
N
E
FI
N
A
L
D
E
V
E
L
O
P
M
E
N
T
P
L
A
N
FO
R
T
C
O
L
L
I
N
S
,
C
O
THESE PLANS ARE AN INSTRUMENT OF SERVICE
AND ARE THE PROPERTY OF GALLOWAY, AND MAY
NOT BE DUPLICATED, DISCLOSED, OR REPRODUCED
WITHOUT THE WRITTEN CONSENT OF GALLOWAY.
COPYRIGHTS AND INFRINGEMENTS WILL BE
ENFORCED AND PROSECUTED.
COPYRIGHT
5235 Ronald Reagan Blvd., Suite 200
Johnstown, CO 80534
970.800.3300
GallowayUS.com
NOT
F
O
R
CON
S
T
R
U
C
T
I
O
N
#Date Issue / Description Init.
Project No:
Drawn By:
Checked By:
Date:
HFH000073.20
10/01/2025
Sheet of 68
SSAPT
CWA
SP
VTC
VTC
LOC
LOC
LOC
CF
CF
CF
SF
SF
SF
IP
IP
IP
IP
IP OP
OP
IP
IP
IP
Know what's
before you dig.
PGS
JEP
INTERIM EROSION
CONTROL PLAN
25
C4.5
-
-
-
-
-
-
-
-
-
-
-
-
-
-
H:
\
H
\
H
a
r
t
f
o
r
d
H
o
m
e
s
\
C
O
F
o
r
t
C
o
l
l
i
n
s
H
F
H
7
3
-
B
l
o
o
m
C
o
m
m
e
r
c
i
a
l
\
0
C
I
V
\
3
-
C
D
\
F
D
P
\
H
F
H
0
7
3
_
C
4
.
0
-
I
n
t
e
r
i
m
E
r
o
s
i
o
n
C
o
n
t
r
o
l
P
l
a
n
F
D
P
.
d
w
g
-
RJ
B
a
r
n
e
s
-
10
/
1
/
2
0
2
5
BL
O
O
M
F
I
L
I
N
G
N
I
N
E
FI
N
A
L
D
E
V
E
L
O
P
M
E
N
T
P
L
A
N
FO
R
T
C
O
L
L
I
N
S
,
C
O
THESE PLANS ARE AN INSTRUMENT OF SERVICE
AND ARE THE PROPERTY OF GALLOWAY, AND MAY
NOT BE DUPLICATED, DISCLOSED, OR REPRODUCED
WITHOUT THE WRITTEN CONSENT OF GALLOWAY.
COPYRIGHTS AND INFRINGEMENTS WILL BE
ENFORCED AND PROSECUTED.
COPYRIGHT
5235 Ronald Reagan Blvd., Suite 200
Johnstown, CO 80534
970.800.3300
GallowayUS.com
NOT
F
O
R
CON
S
T
R
U
C
T
I
O
N
#Date Issue / Description Init.
Project No:
Drawn By:
Checked By:
Date:
HFH000073.20
10/01/2025
Sheet of 68
VTC
VTC
POST
CF SF
LOC
LOC
CF
SF
IP
IP
IP
IP
IP
IP
IP
OP
Know what's
before you dig.
PGS
JEP
INTERIM EROSION
CONTROL PLAN
26
C4.6
-
-
-
-
-
-
-
-
-
-
-
-
-
-
H:
\
H
\
H
a
r
t
f
o
r
d
H
o
m
e
s
\
C
O
F
o
r
t
C
o
l
l
i
n
s
H
F
H
7
3
-
B
l
o
o
m
C
o
m
m
e
r
c
i
a
l
\
0
C
I
V
\
3
-
C
D
\
F
D
P
\
H
F
H
0
7
3
_
C
4
.
0
-
I
n
t
e
r
i
m
E
r
o
s
i
o
n
C
o
n
t
r
o
l
P
l
a
n
F
D
P
.
d
w
g
-
RJ
B
a
r
n
e
s
-
10
/
1
/
2
0
2
5
BL
O
O
M
F
I
L
I
N
G
N
I
N
E
FI
N
A
L
D
E
V
E
L
O
P
M
E
N
T
P
L
A
N
FO
R
T
C
O
L
L
I
N
S
,
C
O
THESE PLANS ARE AN INSTRUMENT OF SERVICE
AND ARE THE PROPERTY OF GALLOWAY, AND MAY
NOT BE DUPLICATED, DISCLOSED, OR REPRODUCED
WITHOUT THE WRITTEN CONSENT OF GALLOWAY.
COPYRIGHTS AND INFRINGEMENTS WILL BE
ENFORCED AND PROSECUTED.
COPYRIGHT
5235 Ronald Reagan Blvd., Suite 200
Johnstown, CO 80534
970.800.3300
GallowayUS.com
NOT
F
O
R
CON
S
T
R
U
C
T
I
O
N
#Date Issue / Description Init.
Project No:
Drawn By:
Checked By:
Date:
HFH000073.20
10/01/2025
Sheet of 68
LOC
LOC
LOC
SEED
SEED
SEED
SEED
Know what's
before you dig.
PGS
JEP
FINAL EROSION CONTROL
PLAN
29
C4.9
-
-
-
-
-
-
-
-
-
-
-
-
-
-
H:
\
H
\
H
a
r
t
f
o
r
d
H
o
m
e
s
\
C
O
F
o
r
t
C
o
l
l
i
n
s
H
F
H
7
3
-
B
l
o
o
m
C
o
m
m
e
r
c
i
a
l
\
0
C
I
V
\
3
-
C
D
\
F
D
P
\
H
F
H
0
7
3
_
C
4
.
0
-
F
i
n
a
l
E
r
o
s
i
o
n
C
o
n
t
r
o
l
P
l
a
n
F
D
P
.
d
w
g
-
RJ
B
a
r
n
e
s
-
10
/
1
/
2
0
2
5
BL
O
O
M
F
I
L
I
N
G
N
I
N
E
FI
N
A
L
D
E
V
E
L
O
P
M
E
N
T
P
L
A
N
FO
R
T
C
O
L
L
I
N
S
,
C
O
THESE PLANS ARE AN INSTRUMENT OF SERVICE
AND ARE THE PROPERTY OF GALLOWAY, AND MAY
NOT BE DUPLICATED, DISCLOSED, OR REPRODUCED
WITHOUT THE WRITTEN CONSENT OF GALLOWAY.
COPYRIGHTS AND INFRINGEMENTS WILL BE
ENFORCED AND PROSECUTED.
COPYRIGHT
5235 Ronald Reagan Blvd., Suite 200
Johnstown, CO 80534
970.800.3300
GallowayUS.com
NOT
F
O
R
CON
S
T
R
U
C
T
I
O
N
#Date Issue / Description Init.
Project No:
Drawn By:
Checked By:
Date:
HFH000073.20
10/01/2025
Sheet of 68
LOC
LOC
LOC
SEED
SEED
SEED
Know what's
before you dig.
PGS
JEP
FINAL EROSION CONTROL
PLAN
30
C4.10
-
-
-
-
-
-
-
-
-
-
-
-
-
-
H:
\
H
\
H
a
r
t
f
o
r
d
H
o
m
e
s
\
C
O
F
o
r
t
C
o
l
l
i
n
s
H
F
H
7
3
-
B
l
o
o
m
C
o
m
m
e
r
c
i
a
l
\
0
C
I
V
\
3
-
C
D
\
F
D
P
\
H
F
H
0
7
3
_
C
4
.
0
-
F
i
n
a
l
E
r
o
s
i
o
n
C
o
n
t
r
o
l
P
l
a
n
F
D
P
.
d
w
g
-
RJ
B
a
r
n
e
s
-
10
/
1
/
2
0
2
5
BL
O
O
M
F
I
L
I
N
G
N
I
N
E
FI
N
A
L
D
E
V
E
L
O
P
M
E
N
T
P
L
A
N
FO
R
T
C
O
L
L
I
N
S
,
C
O
THESE PLANS ARE AN INSTRUMENT OF SERVICE
AND ARE THE PROPERTY OF GALLOWAY, AND MAY
NOT BE DUPLICATED, DISCLOSED, OR REPRODUCED
WITHOUT THE WRITTEN CONSENT OF GALLOWAY.
COPYRIGHTS AND INFRINGEMENTS WILL BE
ENFORCED AND PROSECUTED.
COPYRIGHT
5235 Ronald Reagan Blvd., Suite 200
Johnstown, CO 80534
970.800.3300
GallowayUS.com
NOT
F
O
R
CON
S
T
R
U
C
T
I
O
N
#Date Issue / Description Init.
Project No:
Drawn By:
Checked By:
Date:
HFH000073.20
10/01/2025
Sheet of 68
LOC
LOC
SEED
SEED
Know what's
before you dig.
PGS
JEP
FINAL EROSION CONTROL
PLAN
31
C4.11
-
-
-
-
-
-
-
-
-
-
-
-
-
-
H:
\
H
\
H
a
r
t
f
o
r
d
H
o
m
e
s
\
C
O
F
o
r
t
C
o
l
l
i
n
s
H
F
H
7
3
-
B
l
o
o
m
C
o
m
m
e
r
c
i
a
l
\
0
C
I
V
\
3
-
C
D
\
F
D
P
\
H
F
H
0
7
3
_
C
4
.
0
-
F
i
n
a
l
E
r
o
s
i
o
n
C
o
n
t
r
o
l
P
l
a
n
F
D
P
.
d
w
g
-
RJ
B
a
r
n
e
s
-
10
/
1
/
2
0
2
5
BL
O
O
M
F
I
L
I
N
G
N
I
N
E
FI
N
A
L
D
E
V
E
L
O
P
M
E
N
T
P
L
A
N
FO
R
T
C
O
L
L
I
N
S
,
C
O
THESE PLANS ARE AN INSTRUMENT OF SERVICE
AND ARE THE PROPERTY OF GALLOWAY, AND MAY
NOT BE DUPLICATED, DISCLOSED, OR REPRODUCED
WITHOUT THE WRITTEN CONSENT OF GALLOWAY.
COPYRIGHTS AND INFRINGEMENTS WILL BE
ENFORCED AND PROSECUTED.
COPYRIGHT
5235 Ronald Reagan Blvd., Suite 200
Johnstown, CO 80534
970.800.3300
GallowayUS.com
NOT
F
O
R
CON
S
T
R
U
C
T
I
O
N
#Date Issue / Description Init.
Project No:
Drawn By:
Checked By:
Date:
HFH000073.20
10/01/2025
Sheet of 68
LOC
LOC
LOC
LOC
SEED
SEED
SEED
Know what's
before you dig.
PGS
JEP
FINAL EROSION CONTROL
PLAN
32
C4.12
-
-
-
-
-
-
-
-
-
-
-
-
-
-
H:
\
H
\
H
a
r
t
f
o
r
d
H
o
m
e
s
\
C
O
F
o
r
t
C
o
l
l
i
n
s
H
F
H
7
3
-
B
l
o
o
m
C
o
m
m
e
r
c
i
a
l
\
0
C
I
V
\
3
-
C
D
\
F
D
P
\
H
F
H
0
7
3
_
C
4
.
0
-
F
i
n
a
l
E
r
o
s
i
o
n
C
o
n
t
r
o
l
P
l
a
n
F
D
P
.
d
w
g
-
RJ
B
a
r
n
e
s
-
10
/
1
/
2
0
2
5
BL
O
O
M
F
I
L
I
N
G
N
I
N
E
FI
N
A
L
D
E
V
E
L
O
P
M
E
N
T
P
L
A
N
FO
R
T
C
O
L
L
I
N
S
,
C
O
THESE PLANS ARE AN INSTRUMENT OF SERVICE
AND ARE THE PROPERTY OF GALLOWAY, AND MAY
NOT BE DUPLICATED, DISCLOSED, OR REPRODUCED
WITHOUT THE WRITTEN CONSENT OF GALLOWAY.
COPYRIGHTS AND INFRINGEMENTS WILL BE
ENFORCED AND PROSECUTED.
COPYRIGHT
5235 Ronald Reagan Blvd., Suite 200
Johnstown, CO 80534
970.800.3300
GallowayUS.com
NOT
F
O
R
CON
S
T
R
U
C
T
I
O
N
#Date Issue / Description Init.
Project No:
Drawn By:
Checked By:
Date:
HFH000073.20
10/01/2025
Sheet of 68
PGS
JEP
EROSION CONTROL
DETAILS
33
C4.13
-
-
-
-
-
-
-
-
-
-
-
-
-
-
H:
\
H
\
H
a
r
t
f
o
r
d
H
o
m
e
s
\
C
O
F
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COPYRIGHTS AND INFRINGEMENTS WILL BE
ENFORCED AND PROSECUTED.
COPYRIGHT
5235 Ronald Reagan Blvd., Suite 200
Johnstown, CO 80534
970.800.3300
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10/01/2025
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NOT BE DUPLICATED, DISCLOSED, OR REPRODUCED
WITHOUT THE WRITTEN CONSENT OF GALLOWAY.
COPYRIGHTS AND INFRINGEMENTS WILL BE
ENFORCED AND PROSECUTED.
COPYRIGHT
5235 Ronald Reagan Blvd., Suite 200
Johnstown, CO 80534
970.800.3300
GallowayUS.com
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WITHOUT THE WRITTEN CONSENT OF GALLOWAY.
COPYRIGHTS AND INFRINGEMENTS WILL BE
ENFORCED AND PROSECUTED.
COPYRIGHT
5235 Ronald Reagan Blvd., Suite 200
Johnstown, CO 80534
970.800.3300
GallowayUS.com
NOT
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HFH000073.20
10/01/2025
Sheet of 68
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DETAILS
36
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COPYRIGHTS AND INFRINGEMENTS WILL BE
ENFORCED AND PROSECUTED.
COPYRIGHT
5235 Ronald Reagan Blvd., Suite 200
Johnstown, CO 80534
970.800.3300
GallowayUS.com
NOT
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#Date Issue / Description Init.
Project No:
Drawn By:
Checked By:
Date:
HFH000073.20
10/01/2025
Sheet of 68
Sediment Basin G1 Tributary Area Required
(Ac) Volume (CF)
11.00 39600
POND ELEV AREA VOLUME VOLUMEsum VOLUMEsum
DESIGN (ft2) (ft3) (ft3)(Ac-ft)
4928.00 7,700.0 0 0 0.00
4929.00 8,700.0 8,195 8,195 0.19
4930.00 9,900.0 9,294 17,488 0.40
4931.00 11,200.0 10,543 28,032 0.64
4932.00 12,500.0 11,844 39,876 0.92
Prismoidal Method
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1
Sediment Basin H Tributary Area Required
(Ac) Volume (CF)
10.70 38520
POND ELEV AREA VOLUME VOLUMEsum VOLUMEsum
DESIGN (ft2) (ft3) (ft3)(Ac-ft)
4924.00 7,600.0 0 0 0.00
4925.00 8,600.0 8,095 8,095 0.19
4926.00 9,800.0 9,193 17,288 0.40
4927.00 11,000.0 10,394 27,683 0.64
4928.00 12,000.0 11,496 39,179 0.90
Prismoidal Method
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Sediment Basin J Tributary Area Required
(Ac) Volume (CF)
6.90 24840
POND ELEV AREA VOLUME VOLUMEsum VOLUMEsum
DESIGN (ft2) (ft3) (ft3)(Ac-ft)
4925.00 4,500.0 0 0 0.00
4926.00 5,600.0 5,040 5,040 0.12
4927.00 6,700.0 6,142 11,182 0.26
4928.00 7,700.0 7,194 18,376 0.42
4929.00 8,700.0 8,195 26,571 0.61
Prismoidal Method
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J
Galloway & Company, Inc. Page 31 of 33
Appendix C – Training Documentation
Silt Fence (SF) SC-1
November 2010 Urban Drainage and Flood Control District SF-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph SF-1. Silt fence creates a sediment barrier, forcing
sheet flow runoff to evaporate or infiltrate.
Description
A silt fence is a woven geotextile fabric
attached to wooden posts and trenched
into the ground. It is designed as a
sediment barrier to intercept sheet flow
runoff from disturbed areas.
Appropriate Uses
A silt fence can be used where runoff is
conveyed from a disturbed area as sheet
flow. Silt fence is not designed to
receive concentrated flow or to be used
as a filter fabric. Typical uses include:
Down slope of a disturbed area to
accept sheet flow.
Along the perimeter of a receiving
water such as a stream, pond or
wetland.
At the perimeter of a construction site.
Design and Installation
Silt fence should be installed along the contour of slopes so that it intercepts sheet flow. The maximum
recommended tributary drainage area per 100 lineal feet of silt fence, installed along the contour, is
approximately 0.25 acres with a disturbed slope length of up to 150 feet and a tributary slope gradient no
steeper than 3:1. Longer and steeper slopes require additional measures. This recommendation only
applies to silt fence installed along the contour. Silt fence installed for other uses, such as perimeter
control, should be installed in a way that will not produce concentrated flows. For example, a "J-hook"
installation may be appropriate to force runoff to pond and evaporate or infiltrate in multiple areas rather
than concentrate and cause erosive conditions parallel to the silt fence.
See Detail SF-1 for proper silt fence installation, which involves proper trenching, staking, securing the
fabric to the stakes, and backfilling the silt fence. Properly installed silt fence should not be easily pulled
out by hand and there should be no gaps between the ground and the fabric.
Silt fence must meet the minimum allowable strength requirements, depth of installation requirement, and
other specifications in the design details. Improper installation
of silt fence is a common reason for silt fence failure; however,
when properly installed and used for the appropriate purposes, it
can be highly effective.
Silt Fence
Functions
Erosion Control No
Sediment Control Yes
Site/Material Management No
SC-1 Silt Fence (SF)
SF-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Photograph SF-2. When silt fence is not installed along
the contour, a "J-hook" installation may be appropriate
to ensure that the BMP does not create concentrated
flow parallel to the silt fence. Photo courtesy of Tom
Gore.
Maintenance and Removal
Inspection of silt fence includes observing the
material for tears or holes and checking for slumping
fence and undercut areas bypassing flows. Repair of
silt fence typically involves replacing the damaged
section with a new section. Sediment accumulated
behind silt fence should be removed, as needed to
maintain BMP effectiveness, typically before it
reaches a depth of 6 inches.
Silt fence may be removed when the upstream area
has reached final stabilization.
Silt Fence (SF) SC-1
November 2010 Urban Drainage and Flood Control District SF-3
Urban Storm Drainage Criteria Manual Volume 3
SC-1 Silt Fence (SF)
SF-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Construction Fence (CF) SM-3
November 2010 Urban Drainage and Flood Control District CF-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph CF-1.
existing vegetation is being protected. Photo courtesy of Douglas
County.
Description
A construction fence restricts site access
to designated entrances and exits,
delineates construction site boundaries,
and keeps construction out of sensitive
areas such as natural areas to be
preserved as open space, wetlands and
riparian areas.
Appropriate Uses
A construction fence can be used to
delineate the site perimeter and locations
within the site where access is restricted
to protect natural resources such as
wetlands, waterbodies, trees, and other
natural areas of the site that should not be
disturbed.
If natural resource protection is an objective, then the construction fencing should be used in combination
with other perimeter control BMPs such as silt fence, sediment control logs or similar measures.
Design and Installation
Construction fencing may be chain link or plastic mesh and should be installed following manufacturer’s
recommendations. See Detail CF-1 for typical installations.
Do not place construction fencing in areas within work limits of machinery.
Maintenance and Removal
Inspect fences for damage; repair or replace as necessary.
Fencing should be tight and any areas with slumping or fallen posts should be reinstalled.
Fencing should be removed once construction is complete.
Construction Fence
Erosion Control No
SM-3 Construction Fence (CF)
CF-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Construction Fence (CF) SM-3
November 2010 Urban Drainage and Flood Control District CF-3
Urban Storm Drainage Criteria Manual Volume 3
Good Housekeeping Practices (GH) MM-3
November 2010 Urban Drainage and Flood Control District GH-1
Urban Storm Drainage Criteria Manual Volume 3
Photographs GH-1 and GH-2.
storage and secondary containment for fuel tanks
are important good housekeeping practices. Photos
courtesy of CDOT and City of Aurora.
Description
Implement construction site good housekeeping practices to
prevent pollution associated with solid, liquid and hazardous
construction-related materials and wastes. Stormwater
Management Plans (SWMPs) should clearly specify BMPs
including these good housekeeping practices:
Provide for waste management.
Establish proper building material staging areas.
Designate paint and concrete washout areas.
Establish proper equipment/vehicle fueling and
maintenance practices.
Control equipment/vehicle washing and allowable non-
stormwater discharges.
Develop a spill prevention and response plan.
Acknowledgement: This Fact Sheet is based directly on
EPA guidance provided in Developing Your Stormwater
Pollution Prevent Plan (EPA 2007).
Appropriate Uses
Good housekeeping practices are necessary at all construction sites.
Design and Installation
The following principles and actions should be addressed in SWMPs:
Provide for Waste Management. Implement management procedures and practices to prevent or
reduce the exposure and transport of pollutants in stormwater from solid, liquid and sanitary wastes
that will be generated at the site. Practices such as trash disposal, recycling, proper material handling,
and cleanup measures can reduce the potential for stormwater runoff to pick up construction site
wastes and discharge them to surface waters. Implement a comprehensive set of waste-management
practices for hazardous or toxic materials, such as paints, solvents, petroleum products, pesticides,
wood preservatives, acids, roofing tar, and other materials. Practices should include storage,
handling, inventory, and cleanup procedures, in case of spills. Specific practices that should be
considered include:
Solid or Construction Waste
o Designate trash and bulk waste-collection areas on-
site.
Good Housekeeping
Functions
Erosion Control No
Sediment Control No
Yes
MM-3 Good Housekeeping Practices (GH)
GH-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Photograph GH-3.
surfaces away from waterways and storm drains. Photo
o Recycle materials whenever possible (e.g., paper, wood, concrete, oil).
o Segregate and provide proper disposal options for hazardous material wastes.
o Clean up litter and debris from the construction site daily.
o Locate waste-collection areas away from streets, gutters, watercourses, and storm drains. Waste-
collection areas (dumpsters, and such) are often best located near construction site entrances to
minimize traffic on disturbed soils. Consider secondary containment around waste collection
areas to minimize the likelihood of contaminated discharges.
o Empty waste containers before they are full and overflowing.
Sanitary and Septic Waste
o Provide convenient, well-maintained, and properly located toilet facilities on-site.
o Locate toilet facilities away from storm drain inlets and waterways to prevent accidental spills
and contamination of stormwater.
o Maintain clean restroom facilities and empty portable toilets regularly.
o Where possible, provide secondary containment pans under portable toilets.
o Provide tie-downs or stake-downs for portable toilets.
o Educate employees, subcontractors, and suppliers on locations of facilities.
o Treat or dispose of sanitary and septic waste in accordance with state or local regulations. Do not
discharge or bury wastewater at the construction site.
o Inspect facilities for leaks. If found, repair or replace immediately.
o Special care is necessary during maintenance (pump out) to ensure that waste and/or biocide are
not spilled on the ground.
Hazardous Materials and Wastes
o Develop and implement employee and
subcontractor education, as needed, on
hazardous and toxic waste handling,
storage, disposal, and cleanup.
o Designate hazardous waste-collection
areas on-site.
o Place all hazardous and toxic material
wastes in secondary containment.
Good Housekeeping Practices (GH) MM-3
November 2010 Urban Drainage and Flood Control District GH-3
Urban Storm Drainage Criteria Manual Volume 3
o Hazardous waste containers should be inspected to ensure that all containers are labeled properly
and that no leaks are present.
Establish Proper Building Material Handling and Staging Areas. The SWMP should include
comprehensive handling and management procedures for building materials, especially those that are
hazardous or toxic. Paints, solvents, pesticides, fuels and oils, other hazardous materials or building
materials that have the potential to contaminate stormwater should be stored indoors or under cover
whenever possible or in areas with secondary containment. Secondary containment measures prevent
a spill from spreading across the site and may include dikes, berms, curbing, or other containment
methods. Secondary containment techniques should also ensure the protection of groundwater.
Designate staging areas for activities such as fueling vehicles, mixing paints, plaster, mortar, and
other potential pollutants. Designated staging areas enable easier monitoring of the use of materials
and clean up of spills. Training employees and subcontractors is essential to the success of this
pollution prevention principle. Consider the following specific materials handling and staging
practices:
o Train employees and subcontractors in proper handling and storage practices.
o Clearly designate site areas for staging and storage with signs and on construction drawings.
Staging areas should be located in areas central to the construction site. Segment the staging area
into sub-areas designated for vehicles, equipment, or stockpiles. Construction entrances and exits
should be clearly marked so that delivery vehicles enter/exit through stabilized areas with vehicle
tracking controls (See Vehicle Tracking Control Fact Sheet).
o Provide storage in accordance with Spill Protection, Control and Countermeasures (SPCC)
requirements and plans and provide cover and impermeable perimeter control, as necessary, for
hazardous materials and contaminated soils that must be stored on site.
o Ensure that storage containers are regularly inspected for leaks, corrosion, support or foundation
failure, or other signs of deterioration and tested for soundness.
o Reuse and recycle construction materials when possible.
Designate Concrete Washout Areas. Concrete contractors should be encouraged to use the washout
facilities at their own plants or dispatch facilities when feasible; however, concrete washout
commonly occurs on construction sites. If it is necessary to provide for concrete washout areas on-
site, designate specific washout areas and design facilities to handle anticipated washout water.
Washout areas should also be provided for paint and stucco operations. Because washout areas can
be a source of pollutants from leaks or spills, care must be taken with regard to their placement and
proper use. See the Concrete Washout Area Fact Sheet for detailed guidance.
Both self-constructed and prefabricated washout containers can fill up quickly when concrete, paint,
and stucco work are occurring on large portions of the site. Be sure to check for evidence that
contractors are using the washout areas and not dumping materials onto the ground or into drainage
facilities. If the washout areas are not being used regularly, consider posting additional signage,
relocating the facilities to more convenient locations, or providing training to workers and
contractors.
When concrete, paint, or stucco is part of the construction process, consider these practices which will
help prevent contamination of stormwater. Include the locations of these areas and the maintenance
and inspection procedures in the SWMP.
MM-3 Good Housekeeping Practices (GH)
GH-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
o Do not washout concrete trucks or equipment into storm drains, streets, gutters, uncontained
areas, or streams. Only use designated washout areas.
o Establish washout areas and advertise their locations with signs. Ensure that signage remains in
good repair.
o Provide adequate containment for the amount of wash water that will be used.
o Inspect washout structures daily to detect leaks or tears and to identify when materials need to be
removed.
o Dispose of materials properly. The preferred method is to allow the water to evaporate and to
recycle the hardened concrete. Full service companies may provide dewatering services and
should dispose of wastewater properly. Concrete wash water can be highly polluted. It should
not be discharged to any surface water, storm sewer system, or allowed to infiltrate into the
ground in the vicinity of waterbodies. Washwater should not be discharged to a sanitary sewer
system without first receiving written permission from the system operator.
Establish Proper Equipment/Vehicle Fueling and Maintenance Practices. Create a clearly
designated on-site fueling and maintenance area that is clean and dry. The on-site fueling area should
have a spill kit, and staff should know how to use it. If possible, conduct vehicle fueling and
maintenance activities in a covered area. Consider the following practices to help prevent the
discharge of pollutants to stormwater from equipment/vehicle fueling and maintenance. Include the
locations of designated fueling and maintenance areas and inspection and maintenance procedures in
the SWMP.
o Train employees and subcontractors in proper fueling procedures (stay with vehicles during
fueling, proper use of pumps, emergency shutoff valves, etc.).
o Inspect on-site vehicles and equipment regularly for leaks, equipment damage, and other service
problems.
o Clearly designate vehicle/equipment service areas away from drainage facilities and watercourses
to prevent stormwater run-on and runoff.
o Use drip pans, drip cloths, or absorbent pads when replacing spent fluids.
o Collect all spent fluids, store in appropriate labeled containers in the proper storage areas, and
recycle fluids whenever possible.
Control Equipment/Vehicle Washing and Allowable Non-Stormwater Discharges. Implement
practices to prevent contamination of surface and groundwater from equipment and vehicle wash
water. Representative practices include:
o Educate employees and subcontractors on proper washing procedures.
o Use off-site washing facilities, when available.
o Clearly mark the washing areas and inform workers that all washing must occur in this area.
o Contain wash water and treat it using BMPs. Infiltrate washwater when possible, but maintain
separation from drainage paths and waterbodies.
Good Housekeeping Practices (GH) MM-3
November 2010 Urban Drainage and Flood Control District GH-5
Urban Storm Drainage Criteria Manual Volume 3
o Use high-pressure water spray at vehicle washing facilities without detergents. Water alone can
remove most dirt adequately.
o Do not conduct other activities, such as vehicle repairs, in the wash area.
o Include the location of the washing facilities and the inspection and maintenance procedures in
the SWMP.
Develop a Spill Prevention and Response Plan. Spill prevention and response procedures must be
identified in the SWMP. Representative procedures include identifying ways to reduce the chance of
spills, stop the source of spills, contain and clean up spills, dispose of materials contaminated by
spills, and train personnel responsible for spill prevention and response. The plan should also specify
material handling procedures and storage requirements and ensure that clear and concise spill cleanup
procedures are provided and posted for areas in which spills may potentially occur. When developing
a spill prevention plan, include the following:
o Note the locations of chemical storage areas, storm drains, tributary drainage areas, surface
waterbodies on or near the site, and measures to stop spills from leaving the site.
o Provide proper handling and safety procedures for each type of waste. Keep Material Safety Data
Sheets (MSDSs) for chemical used on site with the SWMP.
o Establish an education program for employees and subcontractors on the potential hazards to
humans and the environment from spills and leaks.
o Specify how to notify appropriate authorities, such as police and fire departments, hospitals, or
municipal sewage treatment facilities to request assistance. Emergency procedures and contact
numbers should be provided in the SWMP and posted at storage locations.
o Describe the procedures, equipment and materials for immediate cleanup of spills and proper
disposal.
o Identify personnel responsible for implementing the plan in the event of a spill. Update the spill
prevention plan and clean up materials as changes occur to the types of chemicals stored and used
at the facility.
MM-3 Good Housekeeping Practices (GH)
GH-6 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Spill Prevention, Control, and Countermeasure (SPCC) Plan
Construction sites may be subject to 40 CFR Part 112 regulations that require the preparation and
implementation of a SPCC Plan to prevent oil spills from aboveground and underground storage tanks.
The facility is subject to this rule if it is a non-transportation-related facility that:
Has a total storage capacity greater than 1,320 gallons or a completely buried storage capacity
greater than 42,000 gallons.
Could reasonably be expected to discharge oil in quantities that may be harmful to navigable waters
of the United States and adjoining shorelines.
Furthermore, if the facility is subject to 40 CFR Part 112, the SWMP should reference the SPCC Plan.
To find out more about SPCC Plans, see EPA's website on SPPC at www.epa.gov/oilspill/spcc.htm.
Reporting Oil Spills
In the event of an oil spill, contact the National Response Center toll free at 1-800-424- 8802 for
assistance, or for more details, visit their website: www.nrc.uscg.mil.
Maintenance and Removal
Effective implementation of good housekeeping practices is dependent on clear designation of personnel
responsible for supervising and implementing good housekeeping programs, such as site cleanup and
disposal of trash and debris, hazardous material management and disposal, vehicle and equipment
maintenance, and other practices. Emergency response "drills" may aid in emergency preparedness.
Checklists may be helpful in good housekeeping efforts.
Staging and storage areas require permanent stabilization when the areas are no longer being used for
construction-related activities.
Construction-related materials, debris and waste must be removed from the construction site once
construction is complete.
Design Details
See the following Fact Sheets for related Design Details:
MM-1 Concrete Washout Area
MM-2 Stockpile Management
SM-4 Vehicle Tracking Control
Design details are not necessary for other good housekeeping practices; however, be sure to designate
where specific practices will occur on the appropriate construction drawings.
Sediment Control Log (SCL) SC-2
November 2015 Urban Drainage and Flood Control District SCL-1
Urban Storm Drainage Criteria Manual Volume 3
Photographs SCL-1 and SCL-2. Sediment control logs used as 1) a
perimeter control around a soil stockpile; and, 2) as a "J-hook"
perimeter control at the corner of a construction site.
Description
A sediment control log is a linear roll
made of natural materials such as
straw, coconut fiber, or compost. The
most common type of sediment control
log has straw filling and is often
referred to as a "straw wattle." All
sediment control logs are used as a
sediment barrier to intercept sheet flow
runoff from disturbed areas.
Appropriate Uses
Sediment control logs can be used in
the following applications to trap
sediment:
As perimeter control for stockpiles
and the site.
As part of inlet protection designs.
As check dams in small drainage
ditches. (Sediment control logs
are not intended for use in
channels with high flow
velocities.)
On disturbed slopes to shorten flow
lengths (as an erosion control).
As part of multi-layered perimeter control along a receiving water such as a stream, pond or wetland.
Sediment control logs work well in combination with other layers of erosion and sediment controls.
Design and Installation
Sediment control logs should be installed along the contour to avoid concentrating flows. The maximum
allowable tributary drainage area per 100 lineal feet of sediment control log, installed along the contour, is
approximately 0.25 acres with a disturbed slope length of up to 150 feet and a tributary slope gradient no
steeper than 3:1. Longer and steeper slopes require additional measures. This recommendation only
applies to sediment control logs installed along the contour. When installed for other uses, such as
perimeter control, it should be installed in a way that will not
produce concentrated flows. For example, a "J-hook"
installation may be appropriate to force runoff to pond and
evaporate or infiltrate in multiple areas rather than concentrate
and cause erosive conditions parallel to the BMP.
Sediment Control Log
Functions
Erosion Control Moderate
Sediment Control Yes
Site/Material Management No
SC-2 Sediment Control Log (SCL)
SCL-2 Urban Drainage and Flood Control District November 2015
Urban Storm Drainage Criteria Manual Volume 3
Although sediment control logs initially allow runoff to flow through the BMP, they can quickly become
a barrier and should be installed as if they are impermeable.
Design details and notes for sediment control logs are provided in the following details. Sediment logs
must be properly installed per the detail to prevent undercutting, bypassing and displacement. When
installed on slopes, sediment control logs should be installed along the contours (i.e., perpendicular to
flow).
Improper installation can lead to poor performance. Be sure that sediment control logs are properly
trenched (if lighter than 8 lb/foot), anchored and tightly jointed.
Maintenance and Removal
Be aware that sediment control logs will eventually degrade. Remove accumulated sediment before the
depth is one-half the height of the sediment log and repair damage to the sediment log, typically by
replacing the damaged section.
Once the upstream area is stabilized, remove and properly dispose of the logs. Areas disturbed beneath
the logs may need to be seeded and mulched. Sediment control logs that are biodegradable may
occasionally be left in place (e.g., when logs are used in conjunction with erosion control blankets as
permanent slope breaks). However, removal of sediment control logs after final stabilization is typically
appropriate when used in perimeter control, inlet protection and check dam applications. Compost from
compost sediment control logs may be spread over the area and seeded as long as this does not cover
newly established vegetation.
Sediment Control Log (SCL) SC-2
November 2015 Urban Drainage and Flood Control District SCL-3
Urban Storm Drainage Criteria Manual Volume 3
SC-2 Sediment Control Log (SCL)
SCL-4 Urban Drainage and Flood Control District November 2015
Urban Storm Drainage Criteria Manual Volume 3
Sediment Control Log (SCL) SC-2
November 2015 Urban Drainage and Flood Control District SCL-5
Urban Storm Drainage Criteria Manual Volume 3
SC-2 Sediment Control Log (SCL)
SCL-6 Urban Drainage and Flood Control District November 2015
Urban Storm Drainage Criteria Manual Volume 3
Vehicle Tracking Control (VTC) SM-4
November 2010 Urban Drainage and Flood Control District VTC-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph VTC-1. A vehicle tracking control pad constructed with
properly sized rock reduces off-site sediment tracking.
Description
Vehicle tracking controls provide
stabilized construction site access where
vehicles exit the site onto paved public
roads. An effective vehicle tracking
control helps remove sediment (mud or
dirt) from vehicles, reducing tracking onto
the paved surface.
Appropriate Uses
Implement a stabilized construction
entrance or vehicle tracking control where
frequent heavy vehicle traffic exits the
construction site onto a paved roadway. An
effective vehicle tracking control is
particularly important during the following conditions:
Wet weather periods when mud is easily tracked off site.
During dry weather periods where dust is a concern.
When poorly drained, clayey soils are present on site.
Although wheel washes are not required in designs of vehicle tracking controls, they may be needed at
particularly muddy sites.
Design and Installation
Construct the vehicle tracking control on a level surface. Where feasible, grade the tracking control
towards the construction site to reduce off-site runoff. Place signage, as needed, to direct construction
vehicles to the designated exit through the vehicle tracking control. There are several different types of
stabilized construction entrances including:
VTC-1. Aggregate Vehicle Tracking Control. This is a coarse-aggregate surfaced pad underlain by a
geotextile. This is the most common vehicle tracking control, and when properly maintained can be
effective at removing sediment from vehicle tires.
VTC-2. Vehicle Tracking Control with Construction Mat or Turf Reinforcement Mat. This type of
control may be appropriate for site access at very small construction sites with low traffic volume over
vegetated areas. Although this application does not typically remove sediment from vehicles, it helps
protect existing vegetation and provides a stabilized entrance.
Vehicle Tracking Control
Functions
Erosion Control Moderate
Sediment Control Yes
Site/Material Management Yes
SM-4 Vehicle Tracking Control (VTC)
VTC-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Photograph VTC-2. A vehicle tracking control pad with wheel wash
facility. Photo courtesy of Tom Gore.
VTC-3. Stabilized Construction Entrance/Exit with Wheel Wash. This is an aggregate pad, similar
to VTC-1, but includes equipment for tire washing. The wheel wash equipment may be as simple as
hand-held power washing equipment to more advance proprietary systems. When a wheel wash is
provided, it is important to direct wash water to a sediment trap prior to discharge from the site.
Vehicle tracking controls are sometimes installed in combination with a sediment trap to treat runoff.
Maintenance and Removal
Inspect the area for degradation and
replace aggregate or material used for a
stabilized entrance/exit as needed. If the
area becomes clogged and ponds water,
remove and dispose of excess sediment
or replace material with a fresh layer of
aggregate as necessary.
With aggregate vehicle tracking controls,
ensure rock and debris from this area do
not enter the public right-of-way.
Remove sediment that is tracked onto the
public right of way daily or more
frequently as needed. Excess sediment
in the roadway indicates that the
stabilized construction entrance needs
maintenance.
Ensure that drainage ditches at the
entrance/exit area remain clear.
A stabilized entrance should be removed only when there is no longer the potential for vehicle tracking to
occur. This is typically after the site has been stabilized.
When wheel wash equipment is used, be sure that the wash water is discharged to a sediment trap prior to
discharge. Also inspect channels conveying the water from the wash area to the sediment trap and
stabilize areas that may be eroding.
When a construction entrance/exit is removed, excess sediment from the aggregate should be removed
and disposed of appropriately. The entrance should be promptly stabilized with a permanent surface
following removal, typically by paving.
Vehicle Tracking Control (VTC) SM-4
November 2010 Urban Drainage and Flood Control District VTC-3
Urban Storm Drainage Criteria Manual Volume 3
SM-4 Vehicle Tracking Control (VTC)
VTC-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Vehicle Tracking Control (VTC) SM-4
November 2010 Urban Drainage and Flood Control District VTC-5
Urban Storm Drainage Criteria Manual Volume 3
SM-4 Vehicle Tracking Control (VTC)
VTC-6 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Inlet Protection (IP) SC-6
August 2013 Urban Drainage and Flood Control District IP-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph IP-1. Inlet protection for a curb opening inlet.
Description
Inlet protection consists of permeable
barriers installed around an inlet to
filter runoff and remove sediment prior
to entering a storm drain inlet. Inlet
protection can be constructed from rock
socks, sediment control logs, silt fence,
block and rock socks, or other materials
approved by the local jurisdiction.
Area inlets can also be protected by
over-excavating around the inlet to
form a sediment trap.
Appropriate Uses
Install protection at storm sewer inlets
that are operable during construction.
Consider the potential for tracked-out
sediment or temporary stockpile areas to contribute sediment to inlets when determining which inlets
must be protected. This may include inlets in the general proximity of the construction area, not limited
to downgradient inlets. Inlet protection is not a stand-alone BMP and should be used in conjunction with
other upgradient BMPs.
Design and Installation
To function effectively, inlet protection measures must be installed to ensure that flows do not bypass the
inlet protection and enter the storm drain without treatment. However, designs must also enable the inlet
to function without completely blocking flows into the inlet in a manner that causes localized flooding.
When selecting the type of inlet protection, consider factors such as type of inlet (e.g., curb or area, sump
or on-grade conditions), traffic, anticipated flows, ability to secure the BMP properly, safety and other
site-specific conditions. For example, block and rock socks will be better suited to a curb and gutter
along a roadway, as opposed to silt fence or sediment control logs, which cannot be properly secured in a
curb and gutter setting, but are effective area inlet protection measures.
Several inlet protection designs are provided in the Design Details. Additionally, a variety of proprietary
products are available for inlet protection that may be approved for use by local governments. If
proprietary products are used, design details and installation procedures from the manufacturer must be
followed. Regardless of the type of inlet protection selected, inlet protection is most effective when
combined with other BMPs such as curb socks and check dams. Inlet protection is often the last barrier
before runoff enters the storm sewer or receiving water.
Design details with notes are provided for these forms of inlet
protection:
IP-1. Block and Rock Sock Inlet Protection for Sump or On-grade
Inlets
IP-2. Curb (Rock) Socks Upstream of Inlet Protection, On-grade
Inlets
Inlet Protection
(various forms)
Functions
Erosion Control No
Sediment Control Yes
Site/Material Management No
SC-6 Inlet Protection (IP)
IP-2 Urban Drainage and Flood Control District August 2013
Urban Storm Drainage Criteria Manual Volume 3
IP-3. Rock Sock Inlet Protection for Sump/Area Inlet
IP-4. Silt Fence Inlet Protection for Sump/Area Inlet
IP-5. Over-excavation Inlet Protection
IP-6. Straw Bale Inlet Protection for Sump/Area Inlet
CIP-1. Culvert Inlet Protection
Propriety inlet protection devices should be installed in accordance with manufacturer specifications.
More information is provided below on selecting inlet protection for sump and on-grade locations.
Inlets Located in a Sump
When applying inlet protection in sump conditions, it is important that the inlet continue to function
during larger runoff events. For curb inlets, the maximum height of the protective barrier should be lower
than the top of the curb opening to allow overflow into the inlet during larger storms without excessive
localized flooding. If the inlet protection height is greater than the curb elevation, particularly if the filter
becomes clogged with sediment, runoff will not enter the inlet and may bypass it, possibly causing
localized flooding, public safety issues, and downstream erosion and damage from bypassed flows.
Area inlets located in a sump setting can be protected through the use of silt fence, concrete block and
rock socks (on paved surfaces), sediment control logs/straw wattles embedded in the adjacent soil and
stacked around the area inlet (on pervious surfaces), over-excavation around the inlet, and proprietary
products providing equivalent functions.
Inlets Located on a Slope
For curb and gutter inlets on paved sloping streets, block and rock sock inlet protection is recommended
in conjunction with curb socks in the gutter leading to the inlet. For inlets located along unpaved roads,
also see the Check Dam Fact Sheet.
Maintenance and Removal
Inspect inlet protection frequently. Inspection and maintenance guidance includes:
Inspect for tears that can result in sediment directly entering the inlet, as well as result in the contents
of the BMP (e.g., gravel) washing into the inlet.
Check for improper installation resulting in untreated flows bypassing the BMP and directly entering
the inlet or bypassing to an unprotected downstream inlet. For example, silt fence that has not been
properly trenched around the inlet can result in flows under the silt fence and directly into the inlet.
Look for displaced BMPs that are no longer protecting the inlet. Displacement may occur following
larger storm events that wash away or reposition the inlet protection. Traffic or equipment may also
crush or displace the BMP.
Monitor sediment accumulation upgradient of the inlet protection.
Inlet Protection (IP) SC-6
August 2013 Urban Drainage and Flood Control District IP-3
Urban Storm Drainage Criteria Manual Volume 3
Remove sediment accumulation from the area upstream of the inlet protection, as needed to maintain
BMP effectiveness, typically when it reaches no more than half the storage capacity of the inlet
protection. For silt fence, remove sediment when it accumulates to a depth of no more than 6 inches.
Remove sediment accumulation from the area upstream of the inlet protection as needed to maintain
the functionality of the BMP.
Propriety inlet protection devices should be inspected and maintained in accordance with
manufacturer specifications. If proprietary inlet insert devices are used, sediment should be removed
in a timely manner to prevent devices from breaking and spilling sediment into the storm drain.
Inlet protection must be removed and properly disposed of when the drainage area for the inlet has
reached final stabilization.
SC-6 Inlet Protection (IP)
IP-4 Urban Drainage and Flood Control District August 2013
Urban Storm Drainage Criteria Manual Volume 3
Inlet Protection (IP) SC-6
August 2013 Urban Drainage and Flood Control District IP-5
Urban Storm Drainage Criteria Manual Volume 3
SC-6 Inlet Protection (IP)
IP-6 Urban Drainage and Flood Control District August 2013
Urban Storm Drainage Criteria Manual Volume 3
Inlet Protection (IP) SC-6
August 2013 Urban Drainage and Flood Control District IP-7
Urban Storm Drainage Criteria Manual Volume 3
SC-6 Inlet Protection (IP)
IP-8 Urban Drainage and Flood Control District August 2013
Urban Storm Drainage Criteria Manual Volume 3
Temporary Outlet Protection (TOP) EC-8
November 2010 Urban Drainage and Flood Control District TOP-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph TOP-1. Riprap outlet protection.
Description
Outlet protection helps to reduce erosion
immediately downstream of a pipe,
culvert, slope drain, rundown or other
conveyance with concentrated, high-
velocity flows. Typical outlet protection
consists of riprap or rock aprons at the
conveyance outlet.
Appropriate Uses
Outlet protection should be used when a
conveyance discharges onto a disturbed
area where there is potential for accelerated
erosion due to concentrated flow. Outlet
protection should be provided where the velocity at the culvert outlet exceeds the maximum permissible
velocity of the material in the receiving channel.
Note: This Fact Sheet and detail are for temporary outlet protection, outlets that are intended to be used
for less than 2 years. For permanent, long-term outlet protection, see the Major Drainage chapter of
Volume 1.
Design and Installation
Design outlet protection to handle runoff from the largest drainage area that may be contributing runoff
during construction (the drainage area may change as a result of grading). Key in rock, around the entire
perimeter of the apron, to a minimum depth of 6 inches for stability. Extend riprap to the height of the
culvert or the normal flow depth of the downstream channel, whichever is less. Additional erosion
control measures such as vegetative lining, turf reinforcement mat and/or other channel lining methods
may be required downstream of the outlet protection if the channel is susceptible to erosion. See Design
Detail OP-1 for additional information.
Maintenance and Removal
Inspect apron for damage and displaced rocks. If rocks are missing or significantly displaced, repair or
replace as necessary. If rocks are continuously missing or displaced, consider increasing the size of the
riprap or deeper keying of the perimeter.
Remove sediment accumulated at the outlet before the outlet protection becomes buried and ineffective.
When sediment accumulation is noted, check that upgradient BMPs, including inlet protection, are in
effective operating condition.
Outlet protection may be removed once the pipe is no longer
draining an upstream area, or once the downstream area has
been sufficiently stabilized. If the drainage pipe is
permanent, outlet protection can be left in place; however,
permanent outlet protection should be designed and
constructed in accordance with the requirements of the
Major Drainage chapter of Volume 2.
Outlet Protection
Functions
Erosion Control Yes
Sediment Control Moderate
Site/Material Management No
EC-8 Temporary Outlet Protection (TOP)
TOP-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Temporary Outlet Protection (TOP) EC-8
November 2010 Urban Drainage and Flood Control District TOP-3
Urban Storm Drainage Criteria Manual Volume 3
Rough Cut Street Control (RCS) EC-9
November 2010 Urban Drainage and Flood Control District RCS-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph RCS-1.
Description
Rough cut street controls are rock or
earthen berms placed along dirt roadways
that are under construction or used for
construction access. These temporary
berms intercept sheet flow and divert
runoff from the roadway, and control
erosion by minimizing concentration of
flow and reducing runoff velocity.
Appropriate Uses
Appropriate uses include:
Temporary dirt construction roadways
that have not received roadbase.
Roadways under construction that will not be paved within 14 days of final grading, and that have not
yet received roadbase.
Design and Installation
Rough cut street controls are designed to redirect sheet flow off the dirt roadway to prevent water from
concentrating and eroding the soil. These controls consist of runoff barriers that are constructed at
intervals along the road. These barriers are installed perpendicular to the longitudinal slope from the
outer edge of the roadside swale to the crown of the road. The barriers are positioned alternately from the
right and left side of the road to allow construction traffic to pass in the lane not barred. If construction
traffic is expected to be congested and a vehicle tracking control has been constructed, rough-cut street
controls may be omitted for 400 feet from the entrance. Runoff from the controls should be directed to
another stormwater BMP such as a roadside swale with check dams once removed from the roadway. See
Detail RCS-1 for additional information.
Maintenance and Removal
Inspect street controls for erosion and stability. If rills are forming in the roadway or cutting through the
control berms, place the street controls at shorter intervals. If earthen berms are used, periodic
recompaction may be necessary. When rock berms are used,
repair and/or replace as necessary when damaged. Street
controls may be removed 14 days prior to road surfacing and
paving.
Rough Cut Street Control
Functions Erosion Control Yes
Sediment Control Moderate
EC-9 Rough Cut Street Control (RCS)
RCS-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Rough Cut Street Control (RCS) EC-9
November 2010 Urban Drainage and Flood Control District RCS-3
Urban Storm Drainage Criteria Manual Volume 3
Rolled Erosion Control Products (RECP) EC-6
November 2010 Urban Drainage and Flood Control District RECP-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph RECP-1.
erosion and providing favorable conditions for revegetation.
Description
Rolled Erosion Control Products
(RECPs) include a variety of
temporary or permanently installed
manufactured products designed to
control erosion and enhance vegetation
establishment and survivability,
particularly on slopes and in channels.
For applications where natural
vegetation alone will provide sufficient
permanent erosion protection,
temporary products such as netting,
open weave textiles and a variety of
erosion control blankets (ECBs) made
of biodegradable natural materials
(e.g., straw, coconut fiber) can be used.
For applications where natural
vegetation alone will not be sustainable under expected flow conditions, permanent rolled erosion control
products such as turf reinforcement mats (TRMs) can be used. In particular, turf reinforcement mats are
designed for discharges that exert velocities and sheer stresses that exceed the typical limits of mature
natural vegetation.
Appropriate Uses
RECPs can be used to control erosion in conjunction with revegetation efforts, providing seedbed
protection from wind and water erosion. These products are often used on disturbed areas on steep
slopes, in areas with highly erosive soils, or as part of drainageway stabilization. In order to select the
appropriate RECP for site conditions, it is important to have a general understanding of the general types
of these products, their expected longevity, and general characteristics.
The Erosion Control Technology Council (ECTC 2005) characterizes rolled erosion control products
according to these categories:
Mulch control netting: A planar woven natural fiber or extruded geosynthetic mesh used as a
temporary degradable rolled erosion control product to anchor loose fiber mulches.
Open weave textile: A temporary degradable rolled erosion control product composed of processed
natural or polymer yarns woven into a matrix, used to provide erosion control and facilitate
vegetation establishment.
Erosion control blanket (ECB): A temporary
degradable rolled erosion control product composed of
processed natural or polymer fibers which are
mechanically, structurally or chemically bound together
to form a continuous matrix to provide erosion control
and facilitate vegetation establishment. ECBs can be
further differentiated into rapidly degrading single-net
and double-net types or slowly degrading types.
Rolled Erosion Control Products
Erosion Control Yes
EC-6 Rolled Erosion Control Products (RECP)
RECP-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Turf Reinforcement Mat (TRM): A rolled erosion control product composed of non-degradable
synthetic fibers, filaments, nets, wire mesh, and/or other elements, processed into a permanent, three-
dimensional matrix of sufficient thickness. TRMs, which may be supplemented with degradable
components, are designed to impart immediate erosion protection, enhance vegetation establishment
and provide long-term functionality by permanently reinforcing vegetation during and after
maturation. Note: TRMs are typically used in hydraulic applications, such as high flow ditches and
channels, steep slopes, stream banks, and shorelines, where erosive forces may exceed the limits of
natural, unreinforced vegetation or in areas where limited vegetation establishment is anticipated.
Tables RECP-1 and RECP-2 provide guidelines for selecting rolled erosion control products appropriate
to site conditions and desired longevity. Table RECP-1 is for conditions where natural vegetation alone
will provide permanent erosion control, whereas Table RECP-2 is for conditions where vegetation alone
will not be adequately stable to provide long-term erosion protection due to flow or other conditions.
Rolled Erosion Control Products (RECP) EC-6
November 2010 Urban Drainage and Flood Control District RECP-3
Urban Storm Drainage Criteria Manual Volume 3
Table RECP-1. ECTC Standard Specification for Temporary Rolled Erosion Control Products
(Adapted from Erosion Control Technology Council 2005)
Product Description Slope
Applications*
Channel
Applications* Tensile
1
Longevity
Maximum
Gradient C Factor2,5 3,4,6
Mulch Control Nets 5:1 (H:V) ≤
Up to 12
months
Erosion Control 4:1 (H:V) ≤0.10 @
4:1
0.5 lbs/ft2
(24 Pa)
5 lbs/ft
(0.073 kN/m)
Control Blankets & 3:1 (H:V) ≤0.15 @
3:1
1.5 lbs/ft2
(72 Pa)
50 lbs/ft
(0.73 kN/m)
Control Blankets 2:1 (H:V) ≤
2:1 (84 Pa) (1.09 kN/m)
Mulch Control Nets 5:1 (H:V) ≤
5:1 (12 Pa) (0.36 kN/m) 24 months
Blankets & Open
Weave Textiles 1.5:1 (H:V) ≤0.25 @
1.5:1
2.00 lbs/ft2
(96 Pa)
100 lbs/ft
(1.45 kN/m) 24 months
Blankets & Open
Weave Textiles
1:1 (H:V) ≤0.25 @
1:1
2.25 lbs/ft2
(108 Pa)
125 lbs/ft
(1.82 kN/m) 36 months
* C Factor and shear stress for mulch control nettings must be obtained with netting used in conjunction
with pre-applied mulch material. (See Section 5.3 of Chapter 7 Construction BMPs for more information
on the C Factor.)
1 Minimum Average Roll Values, Machine direction using ECTC Mod. ASTM D 5035.
2 C Factor calculated as ratio of soil loss from RECP protected slope (tested at specified or greater
gradient, H:V) to ratio of soil loss from unprotected (control) plot in large-scale testing.
3 Required minimum shear stress RECP (unvegetated) can sustain without physical damage or excess
erosion (> 12.7 mm (0.5 in) soil loss) during a 30-minute flow event in large-scale testing.
4 The permissible shear stress levels established for each performance category are based on historical
experience with products characterized by Manning's roughness coefficients in the range of 0.01 - 0.05.
5 Acceptable large-scale test methods may include ASTM D 6459, or other independent testing deemed
acceptable by the engineer.
6 Per the engineer’s discretion. Recommended acceptable large-scale testing protocol may include ASTM
D 6460, or other independent testing deemed acceptable by the engineer.
EC-6 Rolled Erosion Control Products (RECP)
RECP-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Table RECP-2. ECTC Standard Specification for Permanent1 Rolled Erosion Control Products
(Adapted from: Erosion Control Technology Council 2005)
Product Type Channel Applications
TRMs with a minimum thickness of
0.25 inches (6.35 mm) per ASTM D
6525 and UV stability of 80% per
ASTM D 4355 (500 hours
exposure).
Maximum
Gradient
Maximum
Shear Stress4,5 Tensile
2,3
0.5:1 (H:V) 6.0 lbs/ft2 (288 Pa) 125 lbs/ft (1.82
kN/m)
0.5:1 (H:V) 8.0 lbs/ft2 (384 Pa) 150 lbs/ft (2.19
kN/m)
0.5:1 (H:V) 10.0 lbs/ft2 (480 Pa) 175 lbs/ft (2.55
kN/m)
1 For TRMs containing degradable components, all property values must be obtained on the non-
degradable portion of the matting alone.
2 Minimum Average Roll Values, machine direction only for tensile strength determination using ASTM
D 6818 (Supersedes Mod. ASTM D 5035 for RECPs)
3 Field conditions with high loading and/or high survivability requirements may warrant the use of a TRM
with a tensile strength of 44 kN/m (3,000 lb/ft) or greater.
4 Required minimum shear stress TRM (fully vegetated) can sustain without physical damage or excess
erosion (> 12.7 mm (0.5 in.) soil loss) during a 30-minute flow event in large scale testing.
5 Acceptable large-scale testing protocols may include ASTM D 6460, or other independent testing
deemed acceptable by the engineer.
Design and Installation
RECPs should be installed according to manufacturer’s specifications and guidelines. Regardless of the
type of product used, it is important to ensure no gaps or voids exist under the material and that all
corners of the material are secured using stakes and trenching. Continuous contact between the product
and the soil is necessary to avoid failure. Never use metal stakes to secure temporary erosion control
products. Often wooden stakes are used to anchor RECPs; however, wood stakes may present installation
and maintenance challenges and generally take a long time to biodegrade. Some local jurisdictions have
had favorable experiences using biodegradable stakes.
This BMP Fact Sheet provides design details for several commonly used ECB applications, including:
ECB-1 Pipe Outlet to Drainageway
ECB-2 Small Ditch or Drainageway
ECB-3 Outside of Drainageway
Rolled Erosion Control Products (RECP) EC-6
November 2010 Urban Drainage and Flood Control District RECP-5
Urban Storm Drainage Criteria Manual Volume 3
Staking patterns are also provided in the design details according to these factors:
ECB type
Slope or channel type
For other types of RECPs including TRMs, these design details are intended to serve as general
guidelines for design and installation; however, engineers should adhere to manufacturer’s installation
recommendations.
Maintenance and Removal
Inspection of erosion control blankets and other RECPs includes:
Check for general signs of erosion, including voids beneath the mat. If voids are apparent, fill the
void with suitable soil and replace the erosion control blanket, following the appropriate staking
pattern.
Check for damaged or loose stakes and secure loose portions of the blanket.
Erosion control blankets and other RECPs that are biodegradable typically do not need to be removed
after construction. If they must be removed, then an alternate soil stabilization method should be installed
promptly following removal.
Turf reinforcement mats, although generally resistant to biodegradation, are typically left in place as a
dense vegetated cover grows in through the mat matrix. The turf reinforcement mat provides long-term
stability and helps the established vegetation resist erosive forces.
EC-6 Rolled Erosion Control Products (RECP)
RECP-6 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Rolled Erosion Control Products (RECP) EC-6
November 2010 Urban Drainage and Flood Control District RECP-7
Urban Storm Drainage Criteria Manual Volume 3
EC-6 Rolled Erosion Control Products (RECP)
RECP-8 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Rolled Erosion Control Products (RECP) EC-6
November 2010 Urban Drainage and Flood Control District RECP-9
Urban Storm Drainage Criteria Manual Volume 3
PAGE 1 OF 2
1. DESCRIPTION:
Temporary Berms are temporary control measure
barriers made of compacted subsoil or other
approved materials such as embankment or sand
bags. Their function is to intercept and divert
sheet surface runoff away from areas not yet
stabilized, prevent erosion, manage sheet flow,
and reduce sediment transport.
2. CONTROL MEASURE USES
☒ Erosion Control
☒ Sediment Control
☐ Site/Materials Management
3. RELEVANT SPECIFICATION SECTIONS
Section 208 – Erosion Control
a) 208.05 (d) – Construction BMPS
b) 208.11 – Method of Measurement
4. RELEVANT M-STANDARD DETAILS
M-208-1, Sheet 7 of 11 (Grading Applications)
5. BASIS OF PAYMENT
Pay item Description Pay Unit
208-00300 Temporary Berm LF
6. APPLICATIONS
• May be constructed across roadways
(transverse berm) at a slight angle with
respect to the centerline.
• May be constructed along the top edge of
fill slopes or below the toe of exposed and
erodible slopes (upslope or downslope side
of a construction area). They can also be
used at storm drain inlets (when approved)
and across minor swales and ditches.
• May be used to construct Rough Cut Street
Control measures.
• May be used to divert surface sheet flows
from areas where flows may damage
property or interfere with establishment
of vegetation.
• May be used to divert surface runoff to
other control measures like Sediment
Traps.
Temporary Berm along access road
• May be used on relatively flat slopes to
capture surface runoff to shorten the
overall slope length before it has a chance
to concentrate and cause rill and gully
erosion
7. LIMITATIONS
• Only to be used as a temporary measure
on flat areas with slopes less than 2H:1V.
• Must use a secondary erosion control
measure device when sediment control is
an objective.
• Susceptible to erosion when intercepted
concentrated flows have high velocities.
8. SOILS TRIANGLE
PAGE 2 OF 2
9. SWMP ADMINISTRATOR FOR DESIGN CRITERIA
• Temporary Berm:
o Berm must be at least 18 inches tall or high enough to prevent overtopping.
o Berm must have a minimum of 4- to 6-foot base.
o Gradient of all receiving area above berm must be less than 2:1, or flatter.
o Berms must be designed so that flow line of water is at a gradient of less than 3 percent.
Greater than 3 percent may require the use of Check Dams in the flow line behind the
berm.
o Outlets of anticipated flow from captured water behind berms must be designed with
additional control measures suitable to control concentrated flow. Maximum drainage area
for each outlet must be limited to 2 acres.
o Berms installed taller than 2 feet require additional control measures at the toe opposite
of the conveyance side.
10. INSTALLATION CRITERIA
• Construct Temporary Berm using native subsoil materials that can be compacted. Topsoil may
not be used to construct these structures.
• Temporary Berm must be compacted manually or by mechanical means.
• The berms shall be constructed at regular intervals along the road and shall be perpendicular
to the longitudinal slope from the outer edge of the swale to the crown of the road.
11. MAINTENANCE AND REMOVAL
• When upstream area is stabilized, Temporary Berms may be removed. Disturbed area around
control measure must be cleared of any debris or sediment, receive subgrade soil preparation,
and be seeded and mulched.
• Removed material for Temporary Berms may be distributed on-site at a location approved by
the Engineer.
•
Whenever erosion is spotted, replace lost material and recompact berm to match original
conditions.
• If intensive maintenance is necessary to keep this control measure functional, consider using a
different control measure device (see Silt Dike [fact sheet No. 19] or Erosion Logs [fact sheet
Concrete Washout Area (CWA) MM-1
November 2010 Urban Drainage and Flood Control District CWA-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph CWA-1. Example of concrete washout area. Note gravel
tracking pad for access and sign.
Description
Concrete waste management involves
designating and properly managing a
specific area of the construction site as a
concrete washout area. A concrete
washout area can be created using one of
several approaches designed to receive
wash water from washing of tools and
concrete mixer chutes, liquid concrete
waste from dump trucks, mobile batch
mixers, or pump trucks. Three basic
approaches are available: excavation of a
pit in the ground, use of an above ground
storage area, or use of prefabricated haul-
away concrete washout containers.
Surface discharges of concrete washout
water from construction sites are prohibited.
Appropriate Uses
Concrete washout areas must be designated on all sites that will generate concrete wash water or liquid
concrete waste from onsite concrete mixing or concrete delivery.
Because pH is a pollutant of concern for washout activities, when unlined pits are used for concrete
washout, the soil must have adequate buffering capacity to result in protection of state groundwater
standards; otherwise, a liner/containment must be used. The following management practices are
recommended to prevent an impact from unlined pits to groundwater:
The use of the washout site should be temporary (less than 1 year), and
The washout site should be not be located in an area where shallow groundwater may be present, such
as near natural drainages, springs, or wetlands.
Design and Installation
Concrete washout activities must be conducted in a manner that does not contribute pollutants to surface
waters or stormwater runoff. Concrete washout areas may be lined or unlined excavated pits in the
ground, commercially manufactured prefabricated washout containers, or aboveground holding areas
constructed of berms, sandbags or straw bales with a plastic liner.
Although unlined washout areas may be used, lined pits may be required to protect groundwater under
certain conditions.
Do not locate an unlined washout area within 400 feet
of any natural drainage pathway or waterbody or
within 1,000 feet of any wells or drinking water
sources. Even for lined concrete washouts, it is
advisable to locate the facility away from waterbodies
and drainage paths. If site constraints make these
Concrete Washout Area
Functions
Erosion Control No
Sediment Control No
Site/Material Management Yes
MM-1 Concrete Washout Area (CWA)
CWA-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
setbacks infeasible or if highly permeable soils exist in the area, then the pit must be installed with an
impermeable liner (16 mil minimum thickness) or surface storage alternatives using prefabricated
concrete washout devices or a lined aboveground storage area should be used.
Design details with notes are provided in Detail CWA-1 for pits and CWA-2 for aboveground storage
areas. Pre-fabricated concrete washout container information can be obtained from vendors.
Maintenance and Removal
A key consideration for concrete washout areas is to ensure that adequate signage is in place identifying
the location of the washout area. Part of inspecting and maintaining washout areas is ensuring that
adequate signage is provided and in good repair and that the washout area is being used, as opposed to
washout in non-designated areas of the site.
Remove concrete waste in the washout area, as needed to maintain BMP function (typically when filled to
about two-thirds of its capacity). Collect concrete waste and deliver offsite to a designated disposal
location.
Upon termination of use of the washout site, accumulated solid waste, including concrete waste and any
contaminated soils, must be removed from the site to prevent on-site disposal of solid waste. If the wash
water is allowed to evaporate and the concrete hardens, it may be recycled.
Photograph CWA-3. Earthen concrete washout. Photo
courtesy of CDOT.
Photograph CWA-2. Prefabricated concrete washout. Photo
courtesy of CDOT.
Concrete Washout Area (CWA) MM-1
November 2010 Urban Drainage and Flood Control District CWA-3
Urban Storm Drainage Criteria Manual Volume 3
MM-1 Concrete Washout Area (CWA)
CWA-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Temporary and Permanent Seeding (TS/PS) EC-2
June 2012 Urban Drainage and Flood Control District TS/PS-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph TS/PS -1. Equipment used to drill seed. Photo courtesy of
Douglas County.
Description
Temporary seeding can be used to
stabilize disturbed areas that will be
inactive for an extended period.
Permanent seeding should be used to
stabilize areas at final grade that will not
be otherwise stabilized. Effective seeding
includes preparation of a seedbed,
selection of an appropriate seed mixture,
proper planting techniques, and protection
of the seeded area with mulch, geotextiles,
or other appropriate measures.
Appropriate Uses
When the soil surface is disturbed and
will remain inactive for an extended
period (typically 30 days or longer),
proactive stabilization measures should be implemented. If the inactive period is short-lived (on the order
of two weeks), techniques such as surface roughening may be appropriate. For longer periods of
inactivity, temporary seeding and mulching can provide effective erosion control. Permanent seeding
should be used on finished areas that have not been otherwise stabilized.
Typically, local governments have their own seed mixes and timelines for seeding. Check jurisdictional
requirements for seeding and temporary stabilization.
Design and Installation
Effective seeding requires proper seedbed preparation, selection of an appropriate seed mixture, use of
appropriate seeding equipment to ensure proper coverage and density, and protection with mulch or fabric
until plants are established.
The USDCM Volume 2 Revegetation Chapter contains detailed seed mix, soil preparations, and seeding
and mulching recommendations that may be referenced to supplement this Fact Sheet.
Drill seeding is the preferred seeding method. Hydroseeding is not recommended except in areas where
steep slopes prevent use of drill seeding equipment, and even in these instances it is preferable to hand
seed and mulch. Some jurisdictions do not allow hydroseeding or hydromulching.
Seedbed Preparation
Prior to seeding, ensure that areas to be revegetated have
soil conditions capable of supporting vegetation. Overlot
grading can result in loss of topsoil, resulting in poor quality
subsoils at the ground surface that have low nutrient value,
little organic matter content, few soil microorganisms,
rooting restrictions, and conditions less conducive to
infiltration of precipitation. As a result, it is typically
necessary to provide stockpiled topsoil, compost, or other
Temporary and Permanent Seeding
Functions
Erosion Control Yes
Sediment Control No
Site/Material Management No
EC-2 Temporary and Permanent Seeding (TS/PS)
TS/PS-2 Urban Drainage and Flood Control District June 2012
Urban Storm Drainage Criteria Manual Volume 3
soil amendments and rototill them into the soil to a depth of 6 inches or more.
Topsoil should be salvaged during grading operations for use and spread on areas to be revegetated later.
Topsoil should be viewed as an important resource to be utilized for vegetation establishment, due to its
water-holding capacity, structure, texture, organic matter content, biological activity, and nutrient content.
The rooting depth of most native grasses in the semi-arid Denver metropolitan area is 6 to 18 inches. At a
minimum, the upper 6 inches of topsoil should be stripped, stockpiled, and ultimately respread across
areas that will be revegetated.
Where topsoil is not available, subsoils should be amended to provide an appropriate plant-growth
medium. Organic matter, such as well digested compost, can be added to improve soil characteristics
conducive to plant growth. Other treatments can be used to adjust soil pH conditions when needed. Soil
testing, which is typically inexpensive, should be completed to determine and optimize the types and
amounts of amendments that are required.
If the disturbed ground surface is compacted, rip or rototill the surface prior to placing topsoil. If adding
compost to the existing soil surface, rototilling is necessary. Surface roughening will assist in placement
of a stable topsoil layer on steeper slopes, and allow infiltration and root penetration to greater depth.
Prior to seeding, the soil surface should be rough and the seedbed should be firm, but neither too loose
nor compacted. The upper layer of soil should be in a condition suitable for seeding at the proper depth
and conducive to plant growth. Seed-to-soil contact is the key to good germination.
Seed Mix for Temporary Vegetation
To provide temporary vegetative cover on disturbed areas which will not be paved, built upon, or fully
landscaped or worked for an extended period (typically 30 days or more), plant an annual grass
appropriate for the time of planting and mulch the planted areas. Annual grasses suitable for the Denver
metropolitan area are listed in Table TS/PS-1. These are to be considered only as general
recommendations when specific design guidance for a particular site is not available. Local governments
typically specify seed mixes appropriate for their jurisdiction.
Seed Mix for Permanent Revegetation
To provide vegetative cover on disturbed areas that have reached final grade, a perennial grass mix should
be established. Permanent seeding should be performed promptly (typically within 14 days) after
reaching final grade. Each site will have different characteristics and a landscape professional or the local
jurisdiction should be contacted to determine the most suitable seed mix for a specific site. In lieu of a
specific recommendation, one of the perennial grass mixes appropriate for site conditions and growth
season listed in Table TS/PS-2 can be used. The pure live seed (PLS) rates of application recommended
in these tables are considered to be absolute minimum rates for seed applied using proper drill-seeding
equipment.
If desired for wildlife habitat or landscape diversity, shrubs such as rubber rabbitbrush (Chrysothamnus
nauseosus), fourwing saltbush (Atriplex canescens) and skunkbrush sumac (Rhus trilobata) could be
added to the upland seedmixes at 0.25, 0.5 and 1 pound PLS/acre, respectively. In riparian zones,
planting root stock of such species as American plum (Prunus americana), woods rose (Rosa woodsii),
plains cottonwood (Populus sargentii), and willow (Populus spp.) may be considered. On non-topsoiled
upland sites, a legume such as Ladak alfalfa at 1 pound PLS/acre can be included as a source of nitrogen
for perennial grasses.
Temporary and Permanent Seeding (TS/PS) EC-2
June 2012 Urban Drainage and Flood Control District TS/PS-3
Urban Storm Drainage Criteria Manual Volume 3
Seeding dates for the highest success probability of perennial species along the Front Range are generally
in the spring from April through early May and in the fall after the first of September until the ground
freezes. If the area is irrigated, seeding may occur in summer months, as well. See Table TS/PS-3 for
appropriate seeding dates.
Table TS/PS-1. Minimum Drill Seeding Rates for Various Temporary Annual Grasses
Speciesa
(Common name)
Growth
Seasonb
Pounds of
Pure Live Seed
(PLS)/acrec
Planting
Depth
(inches)
1. Oats Cool 35 - 50 1 - 2
2. Spring wheat Cool 25 - 35 1 - 2
3. Spring barley Cool 25 - 35 1 - 2
4. Annual ryegrass Cool 10 - 15 ½
5. Millet Warm 3 - 15 ½ - ¾
6. Sudangrass Warm 5–10 ½ - ¾
7. Sorghum Warm 5–10 ½ - ¾
8. Winter wheat Cool 20–35 1 - 2
9. Winter barley Cool 20–35 1 - 2
10. Winter rye Cool 20–35 1 - 2
11. Triticale Cool 25–40 1 - 2
a Successful seeding of annual grass resulting in adequate plant growth will
usually produce enough dead-plant residue to provide protection from
wind and water erosion for an additional year. This assumes that the cover
is not disturbed or mowed closer than 8 inches.
Hydraulic seeding may be substituted for drilling only where slopes are
steeper than 3:1 or where access limitations exist. When hydraulic
seeding is used, hydraulic mulching should be applied as a separate
operation, when practical, to prevent the seeds from being encapsulated in
the mulch.
b See Table TS/PS-3 for seeding dates. Irrigation, if consistently applied,
may extend the use of cool season species during the summer months.
c Seeding rates should be doubled if seed is broadcast, or increased by 50
percent if done using a Brillion Drill or by hydraulic seeding.
EC-2 Temporary and Permanent Seeding (TS/PS)
TS/PS-4 Urban Drainage and Flood Control District June 2012
Urban Storm Drainage Criteria Manual Volume 3
Table TS/PS-2. Minimum Drill Seeding Rates for Perennial Grasses
Commona
Name
Botanical
Name
Growth
Seasonb
Growth
Form
Seeds/
Pound
Pounds of
PLS/acre
Alakali Soil Seed Mix
Alkali sacaton Sporobolus airoides Cool Bunch 1,750,000 0.25
Basin wildrye Elymus cinereus Cool Bunch 165,000 2.5
Sodar streambank wheatgrass Agropyron riparium 'Sodar' Cool Sod 170,000 2.5
Jose tall wheatgrass Agropyron elongatum 'Jose' Cool Bunch 79,000 7.0
Arriba western wheatgrass Agropyron smithii 'Arriba' Cool Sod 110,000 5.5
Total 17.75
Fertile Loamy Soil Seed Mix
Ephriam crested wheatgrass Agropyron cristatum
'Ephriam' Cool Sod 175,000 2.0
Dural hard fescue Festuca ovina 'duriuscula' Cool Bunch 565,000 1.0
Lincoln smooth brome Bromus inermis leyss
'Lincoln' Cool Sod 130,000 3.0
Sodar streambank wheatgrass Agropyron riparium 'Sodar' Cool Sod 170,000 2.5
Arriba western wheatgrass Agropyron smithii 'Arriba' Cool Sod 110,000 7.0
Total 15.5
High Water Table Soil Seed Mix
Meadow foxtail Alopecurus pratensis Cool Sod 900,000 0.5
Redtop Agrostis alba Warm Open sod 5,000,000 0.25
Reed canarygrass Phalaris arundinacea Cool Sod 68,000 0.5
Lincoln smooth brome Bromus inermis leyss
'Lincoln' Cool Sod 130,000 3.0
Pathfinder switchgrass Panicum virgatum
'Pathfinder' Warm Sod 389,000 1.0
Alkar tall wheatgrass Agropyron elongatum
'Alkar' Cool Bunch 79,000 5.5
Total 10.75
Transition Turf Seed Mixc
Ruebens Canadian bluegrass Poa compressa 'Ruebens' Cool Sod 2,500,000 0.5
Dural hard fescue Festuca ovina 'duriuscula' Cool Bunch 565,000 1.0
Citation perennial ryegrass Lolium perenne 'Citation' Cool Sod 247,000 3.0
Lincoln smooth brome Bromus inermis leyss
'Lincoln' Cool Sod 130,000 3.0
Total 7.5
Temporary and Permanent Seeding (TS/PS) EC-2
June 2012 Urban Drainage and Flood Control District TS/PS-5
Urban Storm Drainage Criteria Manual Volume 3
Table TS/PS-2. Minimum Drill Seeding Rates for Perennial Grasses (cont.)
Common
Name
Botanical
Name
Growth
Seasonb
Growth
Form
Seeds/
Pound
Pounds of
PLS/acre
Sandy Soil Seed Mix
Blue grama Bouteloua gracilis Warm Sod-forming
bunchgrass 825,000 0.5
Camper little bluestem Schizachyrium scoparium
'Camper' Warm Bunch 240,000 1.0
Prairie sandreed Calamovilfa longifolia Warm Open sod 274,000 1.0
Sand dropseed Sporobolus cryptandrus Cool Bunch 5,298,000 0.25
Vaughn sideoats grama Bouteloua curtipendula
'Vaughn' Warm Sod 191,000 2.0
Arriba western wheatgrass Agropyron smithii 'Arriba' Cool Sod 110,000 5.5
Total 10.25
Heavy Clay, Rocky Foothill Seed Mix
Ephriam crested wheatgrassd Agropyron cristatum
'Ephriam' Cool Sod 175,000 1.5
Oahe Intermediate wheatgrass Agropyron intermedium
'Oahe' Cool Sod 115,000 5.5
Vaughn sideoats gramae Bouteloua curtipendula
'Vaughn' Warm Sod 191,000 2.0
Lincoln smooth brome Bromus inermis leyss
'Lincoln' Cool Sod 130,000 3.0
Arriba western wheatgrass Agropyron smithii 'Arriba' Cool Sod 110,000 5.5
Total 17.5
a All of the above seeding mixes and rates are based on drill seeding followed by crimped straw mulch. These rates should be
doubled if seed is broadcast and should be increased by 50 percent if the seeding is done using a Brillion Drill or is applied
through hydraulic seeding. Hydraulic seeding may be substituted for drilling only where slopes are steeper than 3:1. If
hydraulic seeding is used, hydraulic mulching should be done as a separate operation.
b See Table TS/PS-3 for seeding dates.
c If site is to be irrigated, the transition turf seed rates should be doubled.
d Crested wheatgrass should not be used on slopes steeper than 6H to 1V.
e Can substitute 0.5 lbs PLS of blue grama for the 2.0 lbs PLS of Vaughn sideoats grama.
EC-2 Temporary and Permanent Seeding (TS/PS)
TS/PS-6 Urban Drainage and Flood Control District June 2012
Urban Storm Drainage Criteria Manual Volume 3
Table TS/PS-3. Seeding Dates for Annual and Perennial Grasses
Annual Grasses
(Numbers in table reference
species in Table TS/PS-1)
Perennial Grasses
Seeding Dates Warm Cool Warm Cool
January 1–March 15
March 16–April 30 4 1,2,3
May 1–May 15 4
May 16–June 30 4,5,6,7
July 1–July 15 5,6,7
July 16–August 31
September 1–September 30 8,9,10,11
October 1–December 31
Mulch
Cover seeded areas with mulch or an appropriate rolled erosion control product to promote establishment
of vegetation. Anchor mulch by crimping, netting or use of a non-toxic tackifier. See the Mulching BMP
Fact Sheet for additional guidance.
Maintenance and Removal
Monitor and observe seeded areas to identify areas of poor growth or areas that fail to germinate. Reseed
and mulch these areas, as needed.
An area that has been permanently seeded should have a good stand of vegetation within one growing
season if irrigated and within three growing seasons without irrigation in Colorado. Reseed portions of
the site that fail to germinate or remain bare after the first growing season.
Seeded areas may require irrigation, particularly during extended dry periods. Targeted weed control may
also be necessary.
Protect seeded areas from construction equipment and vehicle access.
Stabilized Staging Area (SSA) SM-6
November 2010 Urban Drainage and Flood Control District SSA-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph SSA-1. Example of a staging area with a gravel surface to
prevent mud tracking and reduce runoff. Photo courtesy of Douglas
County.
Description
A stabilized staging area is a clearly
designated area where construction
equipment and vehicles, stockpiles, waste
bins, and other construction-related
materials are stored. The contractor
office trailer may also be located in this
area. Depending on the size of the
construction site, more than one staging
area may be necessary.
Appropriate Uses
Most construction sites will require a
staging area, which should be clearly
designated in SWMP drawings. The layout
of the staging area may vary depending on
the type of construction activity. Staging areas located in roadways due to space constraints require
special measures to avoid materials being washed into storm inlets.
Design and Installation
Stabilized staging areas should be completed prior to other construction activities beginning on the site.
Major components of a stabilized staging area include:
Appropriate space to contain storage and provide for loading/unloading operations, as well as parking
if necessary.
A stabilized surface, either paved or covered, with 3-inch diameter aggregate or larger.
Perimeter controls such as silt fence, sediment control logs, or other measures.
Construction fencing to prevent unauthorized access to construction materials.
Provisions for Good Housekeeping practices related to materials storage and disposal, as described in
the Good Housekeeping BMP Fact Sheet.
A stabilized construction entrance/exit, as described in the Vehicle Tracking Control BMP Fact Sheet,
to accommodate traffic associated with material delivery and waste disposal vehicles.
Over-sizing the stabilized staging area may result in disturbance of existing vegetation in excess of that
required for the project. This increases costs, as well as
requirements for long-term stabilization following the
construction period. When designing the stabilized staging area,
minimize the area of disturbance to the extent practical.
Stabilized Staging Area
Functions
Erosion Control Yes
Sediment Control Moderate
Site/Material
Yes
SM-6 Stabilized Staging Area (SSA)
SSA-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
See Detail SSA-1 for a typical stabilized staging area and SSA-2 for a stabilized staging area when
materials staging in roadways is required.
Maintenance and Removal
Maintenance of stabilized staging areas includes maintaining a stable surface cover of gravel, repairing
perimeter controls, and following good housekeeping practices.
When construction is complete, debris, unused stockpiles and materials should be recycled or properly
disposed. In some cases, this will require disposal of contaminated soil from equipment leaks in an
appropriate landfill. Staging areas should then be permanently stabilized with vegetation or other surface
cover planned for the development.
Minimizing Long-Term Stabilization Requirements
Utilize off-site parking and restrict vehicle access to the site.
Use construction mats in lieu of rock when staging is provided in an area that will not be disturbed
otherwise.
Consider use of a bermed contained area for materials and equipment that do not require a
stabilized surface.
Consider phasing of staging areas to avoid disturbance in an area that will not be otherwise
disturbed.
Stabilized Staging Area (SSA) SM-6
November 2010 Urban Drainage and Flood Control District SSA-3
Urban Storm Drainage Criteria Manual Volume 3
SM-6 Stabilized Staging Area (SSA)
SSA-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Stockpile Management (SP) MM-2
November 2010 Urban Drainage and Flood Control District SP-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph SP-1. A topsoil stockpile that has been partially
revegetated and is protected by silt fence perimeter control.
Description
Stockpile management includes
measures to minimize erosion and
sediment transport from soil stockpiles.
Appropriate Uses
Stockpile management should be used
when soils or other erodible materials
are stored at the construction site.
Special attention should be given to
stockpiles in close proximity to natural
or manmade storm systems.
Design and Installation
Locate stockpiles away from all drainage system components including storm sewer inlets. Where
practical, choose stockpile locations that that will remain undisturbed for the longest period of time as the
phases of construction progress. Place sediment control BMPs around the perimeter of the stockpile, such
as sediment control logs, rock socks, silt fence, straw bales and sand bags. See Detail SP-1 for guidance
on proper establishment of perimeter controls around a stockpile. For stockpiles in active use, provide a
stabilized designated access point on the upgradient side of the stockpile.
Stabilize the stockpile surface with surface roughening, temporary seeding and mulching, erosion control
blankets, or soil binders. Soils stockpiled for an extended period (typically for more than 60 days) should
be seeded and mulched with a temporary grass cover once the stockpile is placed (typically within 14
days). Use of mulch only or a soil binder is acceptable if the stockpile will be in place for a more limited
time period (typically 30-60 days). Timeframes for stabilization of stockpiles noted in this fact sheet are
"typical" guidelines. Check permit requirements for specific federal, state, and/or local requirements that
may be more prescriptive.
Stockpiles should not be placed in streets or paved areas unless no other practical alternative exists. See
the Stabilized Staging Area Fact Sheet for guidance when staging in roadways is unavoidable due to
space or right-of-way constraints. For paved areas, rock socks must be used for perimeter control and all
inlets with the potential to receive sediment from the stockpile (even from vehicle tracking) must be
protected.
Maintenance and Removal
Inspect perimeter controls and inlet protection in accordance with their respective BMP Fact Sheets.
Where seeding, mulch and/or soil binders are used, reseeding or reapplication of soil binder may be
necessary.
When temporary removal of a perimeter BMP is necessary
to access a stockpile, ensure BMPs are reinstalled in
accordance with their respective design detail section.
Stockpile Management
Functions
Erosion Control Yes
Sediment Control Yes
Site/Material Management Yes
MM-2 Stockpile Management (SM)
SP-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
When the stockpile is no longer needed, properly dispose of excess materials and revegetate or otherwise
stabilize the ground surface where the stockpile was located.
Stockpile Management (SP) MM-2
November 2010 Urban Drainage and Flood Control District SP-3
Urban Storm Drainage Criteria Manual Volume 3
MM-2 Stockpile Management (SM)
SP-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Stockpile Management (SP) MM-2
November 2010 Urban Drainage and Flood Control District SP-5
Urban Storm Drainage Criteria Manual Volume 3
MM-2 Stockpile Management (SM)
SP-6 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Rock Sock (RS) SC-5
November 2010 Urban Drainage and Flood Control District RS-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph RS-1. Rock socks placed at regular intervals in a curb
line can help reduce sediment loading to storm sewer inlets. Rock
socks can also be used as perimeter controls.
Description
A rock sock is constructed of gravel
that has been wrapped by wire mesh or
a geotextile to form an elongated
cylindrical filter. Rock socks are
typically used either as a perimeter
control or as part of inlet protection.
When placed at angles in the curb line,
rock socks are typically referred to as
curb socks. Rock socks are intended to
trap sediment from stormwater runoff
that flows onto roadways as a result of
construction activities.
Appropriate Uses
Rock socks can be used at the perimeter
of a disturbed area to control localized
sediment loading. A benefit of rock
socks as opposed to other perimeter controls is that they do not have to be trenched or staked into the
ground; therefore, they are often used on roadway construction projects where paved surfaces are present.
Use rock socks in inlet protection applications when the construction of a roadway is substantially
complete and the roadway has been directly connected to a receiving storm system.
Design and Installation
When rock socks are used as perimeter controls, the maximum recommended tributary drainage area per
100 lineal feet of rock socks is approximately 0.25 acres with disturbed slope length of up to 150 feet and
a tributary slope gradient no steeper than 3:1. A rock sock design detail and notes are provided in Detail
RS-1. Also see the Inlet Protection Fact Sheet for design and installation guidance when rock socks are
used for inlet protection and in the curb line.
When placed in the gutter adjacent to a curb, rock socks should protrude no more than two feet from the
curb in order for traffic to pass safely. If located in a high traffic area, place construction markers to alert
drivers and street maintenance workers of their presence.
Maintenance and Removal
Rock socks are susceptible to displacement and breaking due to vehicle traffic. Inspect rock socks for
damage and repair or replace as necessary. Remove sediment by sweeping or vacuuming as needed to
maintain the functionality of the BMP, typically when sediment
has accumulated behind the rock sock to one-half of the sock's
height.
Once upstream stabilization is complete, rock socks and
accumulated sediment should be removed and properly disposed.
Rock Sock
Functions
Erosion Control No
Sediment Control Yes
Site/Material Management No
SC-5 Rock Sock (RS)
RS-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Rock Sock (RS) SC-5
November 2010 Urban Drainage and Flood Control District RS-3
Urban Storm Drainage Criteria Manual Volume 3
Galloway & Company, Inc. Page 32 of 33
Appendix D – Inspection Report
State Inspection Report Template
Galloway & Company, Inc. Page 33 of 33
Appendix E – Spill and Prevention Control
Spill Prevention and Control Plan
Site Spill Log
Galloway & Company, Inc. Page 1 of 5
5500 Greenwood Plaza Blvd., Suite 200
Greenwood Village, CO 80111
303.770.8884 • GallowayUS.com
SPILL PREVENTION AND CONTROL PLAN
Whenever significant quantities of fuels, materials, vehicle fluids, or other pollutants are to be used on
site, specific procedures for material containment and spill prevention shall be developed and
implemented.
Introduction
The following Spill Prevention and Response Plan shall be implemented during the construction of
improvements at Bloom Commercial and associated thereto. This plan will be implemented to meet the
requirements of the City of Fort Collins (COFC) and the State of Colorado.
Materials On-Site
Spill control procedures will be implemented when materials are stockpiled or when chemicals and/or
fluids are used in the construction area.
Stockpiles of Dry Materials
The following spill prevention procedures shall be implemented:
All materials shall be stockpiled in designated areas, with control measures used to reduce and minimize
the runoff of contaminants. Control measures such as silt fence and sediment control logs will be
installed according to COFC criteria using the details shown on the SWMP plans. Loading and unloading
operations shall be performed in a manner to limit materials from being spilled. Any spilled materials
shall be swept up immediately after the operations are performed.
Vehicle Fueling
The following spill prevention procedures shall be implemented:
All vehicle fueling will be done off-site as much as possible. All on-site fueling operations will be
performed in designated areas. Measures will be taken where necessary to reduce and minimize spills
during vehicle fueling operations. These measures may include the placement of a temporary berm
around the fueling area, covering the fueling area under a temporary portable structure, and/or the
placement of drip pans under valves and tank openings. Berms will be constructed around all fueling
areas. An adequate supply of absorbents will also be stockpiled at each fueling area.
Routine Vehicle and Equipment Maintenance
The following spill prevention procedures shall be implemented:
All vehicle maintenance will be performed off-site when possible. However, there may be occasions
where construction equipment and vehicles may break down at the site and on-site repairs are more
feasible. On-site vehicle and equipment maintenance, if needed, will be performed in designated areas,
where practical, and enclosed by earthen berms. All maintenance areas will maintain an adequate supply
of drip pans. These pans will be placed underneath vehicles as needed and absorbents will be used in
the event of a minor spill or leak.
SPILL RESPONSE
Galloway & Company, Inc. Page 2 of 5
NOTE: IN CASE OF FIRE, EVACUATE ALL PERSONNEL FROM THE IMMEDIATE AREA, RENDER
FIRST AID TO ANYONE WHO IS INJURED, AND DIAL 911 IMMEDIATELY. TAKE APPROPRIATE
STEPS TO PROTECT HUMAN LIFE AND TO CONTROL FIRES FIRST. SPILL CONTROL IS A
SECONDARY CONCERN.
Cleanup and Removal Procedures
• Upon detection of any spill, the first action to be taken is to ensure personal safety. All possible
ignition sources, including running engines, electrical equipment (including cellular
telephones, etc.), or other hazards will be immediately turned off or removed from the area.
The extent of the spill and the nature of the spilled material will be evaluated to determine if
remedial actions could result in any health hazards, escalation of the spill, or further damage
that would intensify the problem. If such conditions exist, a designated employee will oversee
the area of the spill and the construction supervisor will be notified immediately.
• The source of the spill will be identified and if possible the flow of pollutants stopped if it can
be done safely. However, no employee will attend to the source or begin cleanup of the spill
until ALL emergency priorities (fire, injuries, etc.) have been addressed.
Small Spills
Small spills (usually <5 gallons) consist of minor quantities of gasoline, oil, anti-freeze, or other materials
that can be cleaned up by a single employee using readily available materials.
The following procedures shall be used for clean up of small spills:
1. Ensure personal safety, evaluate the spill, and if possible, stop the flow of pollutants.
2. Contain the spread of the spill using absorbents, portable berms, sandbags, or other available
measures.
3. Spread absorbent materials on the area to soak up as much of the liquid as possible and to
prevent or minimize infiltration into the soil.
4. Once the liquids have been absorbed, remove all absorbents from the spill and place the
materials in a suitable storage container. On paved areas, wipe any remaining liquids from the
surface and place the materials in a storage container. Do not spray or wash down the area
using water. For open soil areas, excavate any contaminated soil as soon as possible and place
the soil in a suitable storage container. All materials will then be transported off-site for disposal.
5. If immediate transfer and storage of the contaminated soil is not practical, excavate and place
the contaminated soil on a double thickness sheet of 3-mil or higher polyethylene film. In
addition, a small berm should be formed around the outer edges of the soil stockpile, underneath
the polyethylene film, to ensure that contaminants are not washed from the site during
precipitation events and that materials do not seep through the berm.
6. Record all significant facts and information about the spill, including the following:
• Type of pollutant
• Location
• Apparent source
• Estimated volume
• Time of discovery
• Actions taken to clean up spill
Galloway & Company, Inc. Page 3 of 5
7. Notify the supervisor of the spill and provide the information from Item #6. The supervisor will
then contact the City of Fort Collins and Larimer County.
Medium to Large Spills
Medium to large spills consist of larger quantities of materials (usually >5 - 25 gallons) that are used on
site that cannot be controlled by a single employee. Generally, a number of facility personnel will be
needed to control the spill and a response may require the suspension of other facility activities.
The following procedure shall be used for the cleanup of medium to large spills:
1. Ensure personal safety, evaluate the spill, and if possible, stop the flow of pollutants.
2. Immediately dispatch a front-end loader or similar equipment to the spill and construct a berm
or berms down gradient of the spill to minimize the spread of potential pollutants. On paved
surfaces, portable berms, sandbags, booms, or other measures will be used to control the lateral
spread of the pollutants.
3. When the spread of the spill has been laterally contained, contact the supervisor or
designated facility employee and provide them information on the location, type, and amount of
spilled material, and a briefing on the extent of the spread and measures undertaken to contain
the contaminants.
4. Depending on the nature of the spill, mobilize additional resources as needed to contain the
contaminants.
5. Cleanup will commence when the lateral spread has been contained and the notification to
the supervisor has been made.
6. Freestanding liquid will be bailed or pumped into 55-gallon storage drums, steel tanks, or
other suitable storage containers. When all the liquid has been removed from the pavement or
soil layer, absorbents will be applied to the surface and transferred to the storage containers
when they have soaked up as much of the spill as possible.
7. On paved surfaces, the remaining contaminants will be removed to the extent possible, with
rags, sweeping, or similar measures. The area of the spill will not be sprayed or washed down
using water. Any contaminant soaked materials will be placed into the storage containers with
the other absorbents.
8. The remaining contaminated soils will be excavated and loaded into a dump truck(s) for
disposal off-site at a designated facility. If transport off-site is not immediately available, the
remaining soils will be stockpiled on a double thickness sheet of 3-mil or higher polyethylene
film. In addition, a small berm will be formed around the outer edges of the soil stockpile,
underneath the polyethylene film, to ensure that contaminants are not washed from the site
during precipitation and do not seep through the berm.
9. Record all significant facts and information about the spill, including the following:
• Type of pollutant
• Location
• Apparent source
• Estimated volume
• Time of discovery
• Actions taken to clean up spill
10. Provide the supervisor (or designated employee) with the information from Item #9. The
supervisor will then contact the City of Fort Collins and Larimer County.
Galloway & Company, Inc. Page 4 of 5
NOTIFICATION
Notification to the Colorado Department of Public Health & Environment (CDPHE) is required if there is
any release or suspected release of any substance, including oil or other substances that spill into or
threaten State waters. Unless otherwise noted, notifications are to be made by the supervisor and only
after emergency responses related to the release have been implemented. This will prevent
misinformation and assures that notifications are properly conducted.
The notification requirements are as follows:
1. Spills into/or Threatens State Waters: Immediate notification is required for releases that
occur beneath the surface of the land or impact or threaten waters of the State of threaten the
public health and welfare. Notifications that will be made are:
a. For any substance, regardless of quantity, contact CDPHE at 1-877-518¬5608. State as
follows:
a) Give you name.
b) Give location of spill (name of city).
c) Describe the nature of the spill, type of products, and estimate size of spill.
d) Describe type of action taken thus far, type of assistance or equipment needed.
b. For any quantity of oil or other fluids, call the National Response Center at 1-800-424-8802.
State as follows:
a) Give your name.
b) Give location of spill (name of city and state).
c) Describe the nature of the spill, type of product, and estimate size of spill.
d) Describe type of action taken thus far, type of assistance or equipment needed.
2. Reportable Quantity Spill on Land Surface: Immediate notification is required of a release
upon the land surface of an oil in quantity that exceeds 25 gallons, or of a hazardous substance
that equals or exceeds 10 pounds or its reportable quantity under Section 101(14) of the
Comprehensive Environmental Response, Compensation Liability Act (CERCLA) of 1980 as
amended (40 CFR Part 302) and Section 329c(F3)of the Emergency Planning and Community
Right to Know Act of 1986 (40 CFR Part 355) whichever is less. This requirement does apply at
a minimum to the substances listed in Table A below.
TABLE A
Substances Requiring Notification
SUBSTANCE REPORTABLE QUANTITY
Motor Oil 25 Gallons
Hydraulic Oil 25 Gallons
Gasoline/Diesel Fuel 25 Gallons
The notification procedures to be followed are:
a) Give your name.
b) Give location of spill (name of city and state).
c) Describe nature of the spill, type of product, and estimate size of spill.
d) Describe type of action taken thus far, type of assistance or equipment needed.
e) Give name of land owner
f) Specify department responsible for any facilities that may be impacted
3. Notification is not required for release of oil upon the land surface of 25 gallons or less - that
will not constitute a threat to public health and welfare, the environmental or a threat of entering
the waters of the State.
Galloway & Company, Inc. Page 5 of 5
4. Notification, as required in paragraphs 1 and 2 above, will be made to the CDPHE using the
24-hour telephone number to report environmental spills. All information known about the
release at the time of discovery is to be included, such as the time of occurrence, quantity and
type of material, location and any corrective or clean-up actions presently being taken. Table B
lists these phone numbers.
SPILL RESPONSE CONTACTS
TABLE B
Emergency Notification Contacts
Name/Agency Number
Fort Collins Fire Department 911
Fort Collins Police Department 911
Ambulance 911
Hospital 911
National Response Center 1-800-424-8802
CDPHE - Report Environmental Spills (24
hrs/day)
1-877-518-5608
Colorado Emergency Planning Committee 303-273-1622
Anytown County Sheriff’s Office 970-416-1985
City of Fort Collins 970-221-6505
It is the responsibility of the supervisor to contact the City of Fort Collins, Larimer County, CDPHE, and/or
the National Response Center.
• The National Response Center is to be contacted when a release containing a hazardous
substance or oil in an amount equal to or in excess of a reportable quantity established under
either 40 CFR 110, 4- DFR 117, or 40CFR 302 occurs during a 24-hour period.
• Notification to the CDPHE is required if there is any release or suspected release of any material,
including oil or hazardous substances that spill into or threaten state waters.
REPORTS
The CDPHE requires written notification of a spill or discharge of oil or other substance that may cause
pollution of the waters of the State of Colorado. A written report must be submitted to the Water Quality
Control District (WQCD) within five days after becoming aware of the spill or discharge.
The CDPHE requires a written final report within five days for all releases of an oil or hazardous
substance that require implementation of a contingency plan. The CDPHE may also require additional
reports on the status of the clean up until any required remedial action has been complete.
Written notification of reports must contain at a minimum:
1. Date, time, and duration of the release.
2. Location of the release.
3. Person or persons causing and responsible for the release.
4. Type and amount of oil or substance released.
5. Cause of the release.
6. Environmental damage caused by the release.
7. Actions taken to respond, contain, and clean up the release.
8. Location and method of ultimate disposal of the oil or other fluids.
9. Actions taken to prevent a reoccurrence of the release.
10. Any known or anticipated acute or chronic health risks associated with the release.
11. When appropriate advice regarding medical attention necessary for exposed individuals.
Site Spill Log
Site Location: _________________ ____________________
General Contractor: __________ ________________________________
Any site spill must be reported to the appropriate authorities in accordance with all applicable laws
and regulations. Spills must also be reported to the owner’s representative immediately, but no
later than 24 hours of occurrence.
Date / Time of Spill:____________________________________________________________________
Name / Title: _________________________________________________________________________
Material Spilled and Approximate Quantity: _________________________________________________
_____________________________________________________________________________________
Weather Conditions: __________________________________________________________________
Phase of Construction: ________________________ (Clearing, Rough Grading, Building, Paving, Etc.)
Contractor(s) Representatives Present:
_____________________________________________________________________________________
_____________________________________________________________________________________
Containment Actions Taken and Authorities Notified:
_____________________________________________________________________________________
_____________________________________________________________________________________
Date / Time of Spill:____________________________________________________________________
Name / Title: _________________________________________________________________________
Material Spilled and Approximate Quantity:
_____________________________________________________________________________________
_____________________________________________________________________________________
Weather Conditions: __________________________________________________________________
Phase of Construction: ________________________ (Clearing, Rough Grading, Building, Paving, Etc.)
Contractor(s) Representatives Present:
_____________________________________________________________________________________
_____________________________________________________________________________________
Containment Actions Taken and Authorities Notified:
_____________________________________________________________________________________
_____________________________________________________________________________________
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