HomeMy WebLinkAboutCHOICE CENTER FILING 3 (FORMERLY 1721 S. COLLEGE TOWNHOMES) - PDP - PDP160042 - SUBMITTAL DOCUMENTS - ROUND 3 - EROSION CONTROL LETTER/REPORT (3)EROSION CONTROL REPORT: Choice Center Third Filing
S. College Avenue
Fort Collins, CO
Prepared by:
Kimley-Horn and Associates, Inc.
4582 South Ulster Street, Suite 1500
Denver, CO 80237
Contact: Bryce Christensen
Prepared on: 02/07/2017
Revised on: 05/02/2017
Choice Center Third Filing– Fort Collins, CO
May 2017 Page 1
TABLE OF CONTENTS
SWMP PREPARER CERTIFICATION 04
PERMITTEE / OPERATOR RESPONSIBILITIES 05
PERMITTEE CERTIFICATION 07
OPERATOR CERTIFICATION 08
CONTRACTOR CERTIFICATION 09
GENERAL REQUIREMENTS 10
INTRODUCTION AND PURPOSE 10
PERMIT COVERAGE AND APPLICATIONS 10
DEFINITIONS 10
SITE DESCRIPTION 11
GENERAL PROJECT DESCRIPTION 11
PROJECT CONTACTS 11
PROJECT LOCATION 12
VICINITY MAP 12
EXISTING SITE CONDITIONS 13
THREATENED AND EDANGERED SPECIES 13
WETLANDS 13
DRAINAGE CHARACTERISTICS 13
VEGETATION 13
SOILS 14
SITE AND DISTURBED AREAS 14
RAINFALL DATA 14
RECEIVING WATERS 14
PROPOSED SITE CONDITIONS 15
PROJECT DESCRIPTION 15
TOPOGRAPHY AND DRAINAGE CHARACTERISTICS 15
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PROPOSED CONSTRUCTION ACTIVITIES 15
EROSION CONTROL PLAN REQUIREMENTS 16
STORMWATER MANAGEMENT CONTROLS 17
SWMP ADMINISTRATOR 17
SITE SPECIFIC POLLUTION SOURCES 17
IDENTIFICATION OF POLLUTANT SOURCES 17
BEST MANAGEMENT PRACTICES FOR STORMWATER POLLUTION PREVENTION 19
FINAL STABILIZATION AND LONG TERM STORMWATER MANAGEMENT 21
INSPECTION REQUIREMENTS 22
INSPECTION SCHEDULE REQUIREMENTS 22
INSPECTION PROCEDURES 22
BMP MAINTENANCE / REPLACEMENT AND FAILED BMPS 24
CONCLUSIONS 24
REFERENCES 25
APPENDIX 26
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EXHIBITS
APPENDIX A – EROSION CONTROL PLANS
APPENDIX B – CITY OF FORT COLLINS PERMITS
APPENDIX C – USFWS ENDANGERED SPECIES LISTING
APPENDIX D – SOILS INFORMATION
APPENDIX E – IDENTIFICATION OF POLLUTANT SOURCES
APPENDIX F – BMP DETAILS
APPENDIX G –BMP INSTALLATION LOG
APPENDIX H – SWMP INSPECTION REPORTS
APPENDIX I – BMP CORRECTIVE ACTION LOG
APPENDIX J – SWMP AMENDMENT LOG
APPENDIX K – EROSION AND SEDIMENT CONTROL ESCROW/SECURITY CALCULATION
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CERTIFICATIONS
SWMP Preparer’s Certification
This Stormwater Management Plan (SWMP) has been prepared by me, or under my direct supervision, in
substantial accordance with the requirements of the City of Fort Collins (the City) Stormwater Criteria Manual.
_____________________________________________________________________
Signature Date
Name: Bryce Christensen
Title: Project Manager
Company Name: Kimley-Horn and Associates, Inc.
Address: 4582 South Ulster Street
City, State: Denver, CO 80237
Phone Number: 303-228-2300
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Permittee/Contractor Responsibilities
This Stormwater Management Plan (SWMP) is prepared for CORE Fort Collins 1751 College, LLC.
(the “Site Developer”) to fulfill the erosion control requirements for the City of Fort Collins (the “City”)
and the State of Colorado Department of Public Health and Environment (CDPHE) for the State on
Campus – Phase 2 Project (the “Project”). This narrative, in conjunction with the Erosion Control
Plans included in Appendix A, examines measures taken onsite to improve stormwater quality
leaving the site, and also addresses important erosion control measures implemented prior to and
during construction. A general overview of the procedures outlined in the SWMP which the Operator
(the “Contractor”) shall follow is provided below for reference.
Responsibility
Operator
1. Submit the applicable City and CDPHE Permit Applications,
copies of which is provided in the Appendices.
2. Complete the Permittee / Operator SWMP Certifications
provided within the SWMP Narrative.
3. Complete the Operator / SWMP Administrator Contact
Information identified in the SWMP Narrative.
4. Post the Site in accordance with the requirements identified
on the Erosion Control Plans included in the appendices of
this report.
5. Commence BMP installation and construction in accordance
with the Phased BMP Implementation.
6. Schedule and Complete a Stormwater Management Pre-
Construction Meeting.
7. Complete Land Disturbance / BMP / Site Stabilization Log, a
copy of which is included in the appendices of this report.
8. Complete Inspections in accordance with the SWMP
Inspection Schedule and Procedures outlined within the
SWMP Narrative.
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9. Complete field maintenance or field modifications to
Stormwater Management Practices based upon the results of
the Inspection.
10. Maintain current records of the SWMP Inspections in
accordance with the Inspection Record Keeping identified in
the SWMP Narrative.
11. Maintain current records of the Land Disturbance / BMP / Site
Stabilization Log, a copy of which is included in the
appendices of this report.
12. Maintain current records of the BMP Corrective Action Log, a
copy of which is included in the appendices of this report.
13. Maintain current records of the SWMP Amendment Log, a
copy which is included in the appendices of this report.
14. Achieve Final Stabilization in accordance with the Final
Stabilization practices outlined within the SWMP Narrative.
15. File the applicable City/CDPHE Construction Stormwater
Inactivation Notice.
This summary is provided for Permittee / Operator convenience only and shall not be considered all
inclusive with respect to stormwater management responsibilities. The Permittee / Operator shall
familiarize themselves with the City requirements and SWMP, and implement stormwater
management strategies based upon the recommendations identified herein and varying site
conditions.
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Permittee Certification Form
I certify under penalty of law that this document and all attachments were prepared under my direction
or supervision in accordance with a system designed to assure that qualified personnel properly
gather and evaluate the information submitted. Based on my inquiry of the person or persons who
manage the system, or those persons directly responsible for the gathering of information, the
information submitted is to the best of my knowledge and belief, true, accurate and complete. I am
aware that there are significant penalties for submitting false information, including the possibility of
fine and imprisonment for knowing violations.
_____________________________________
Signature Date
Company Name: __________________________________________________________________
Address: _________________________________________________________________________
City, State: _______________________________________________________________________
Phone Number: ___________________________________________________________________
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Operator Certification Form
I certify under penalty of law that a complete Stormwater Management Plan, has been prepared for
my activity. Based on inquiry of the person or persons who manage the system, or those persons
directly responsible for gathering the information, the Stormwater Management Plan is, to the best of
my knowledge and belief true, accurate, and complete. I am aware that there are significant penalties
for submitting false information, including the possibility of fine and imprisonment for knowing
violations.
_____________________________________
Signature Date
Company Name: __________________________________________________________________
Address: _________________________________________________________________________
City, State: _______________________________________________________________________
Phone Number: ___________________________________________________________________
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Contractor’s Certification Form
(to be duplicated and signed by each contractor or subcontractor)
I certify under penalty of law that a complete Stormwater Management Plan, has been prepared for
my activity. Based on inquiry of the person or persons who manage the system, or those persons
directly responsible for gathering the information, the Stormwater Management Plan is, to the best of
my knowledge and belief true, accurate, and complete. I am aware that there are significant penalties
for submitting false information, including the possibility of fine and imprisonment for knowing
violations.
_____________________________________
Signature Date
Contractor’s Agent: ______________________________________________________________
Agent’s Title: ___________________________________________________________________
Contractor Company Name: _______________________________________________________
Address: _______________________________________________________________________
City, State: _____________________________________________________________________
Phone Number: _________________________________________________________________
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GENERAL REQUIREMENTS
INTRODUCTION AND PURPOSE
This SWMP is provided to support the approval of the Stormwater Management Plan and the
issuance of an Excavation Permit through the City. This Report, in conjunction with the Stormwater
Management Plan Construction Drawings, provides a site and project understanding along with the
guidelines for implementation and maintenance of erosion, sediment and stormwater quality control
measures prior to and during construction of the Project.
The primary goal of pollution prevention efforts during the project construction is to control sediment
and pollutants that originate on the site and prevent them from flowing to surface waters. The purpose
of this SWMP is to provide guidelines for achieving that goal. A successful pollution prevention
program also relies upon careful inspection and adjustments during the construction process in order
to enhance its effectiveness.
This SWMP must be implemented before the construction begins on the site. It primarily addresses
the impact of storm rainfall and runoff on areas of the ground surface disturbed during the construction
process. In addition, there are recommendations for controlling other sources of pollution that could
accompany the major construction activities.
Applicability of this SWMP shall be terminated when disturbed areas are stabilized, permanent
erosion controls are removed, construction activities covered herein have ceased.
PERMIT COVERAGE AND APPLICATIONS
Based upon a Site Disturbance Area of less than one (1) acre and being part of a larger common
area (Choice Center), this site will require approval by the City and stormwater coverage with the
issuance of a Colorado Discharge Permit System (CDPS) - Stormwater Discharge Associated with
Construction Activities Application (the General Permit) through the CDPHE.
A copy of all applicable permits are included in Appendix B of this report.
DEFINITIONS
Operator – The group or individual that is responsible for day-to-day operations on the project site.
The Operator will be assigned the SWMP Administrator role and these terms are used
interchangeably in the SWMP.
Site Developer – Core Fort Collins, LLC.
SWMP – Construction Activities Stormwater Management Plan
SWMP Administrator – The specific individual(s), position or title that is responsible for developing,
implementing, maintaining and revising the SWMP. The activities and responsibilities of the
Administrator shall address all aspects of the facility’s SWMP. The Operator will be assigned the
SWMP Administrator role and these terms are used interchangeably in the SWMP.
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SITE DESCRIPTION
GENERAL PROJECT DESCRIPTION
Kimley-Horn and Associates, Inc., serves as the engineering consultant for Core Fort Collins, LLC.
They are proposing to construct a 10-unit multi-family development at 1721 S College Avenue in Fort
Collins, Colorado (Larimer County). The site work on the approximate 0.36 acre parcel includes
demolition, grading, stormwater management, water, sanitary sewer, paving installation, and
landscape improvements.
PROJECT CONTACTS
SWMP PREPARER
Company: Kimley-Horn and Associates, Inc.
Contact: Bryce Christensen, P.E.
Address: 4582 South Ulster Street – Suite 1500
Denver, CO 80237
Phone: (303) 228-2300
Email: Bryce.Christensen@kimley-horn.com
PERMITTEE
Company: _____________________________________________________
Contact: _____________________________________________________
Address: _____________________________________________________
_____________________________________________________
Phone: _____________________________________________________
Email: _____________________________________________________
SWMP ADMINISTRATOR
Company: _____________________________________________________
Contact: _____________________________________________________
Address: _____________________________________________________
_____________________________________________________
Phone: _____________________________________________________
Email: _____________________________________________________
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PROJECT LOCATION
The project is located in Choice Center on South College Avenue in Fort Collins, Colorado (the “Site”).
More specifically, the Site consists of Lot 2, Choice Center, and Lot 1 Choice Center Filing situated
in the City of Fort Collins, County of Larimer, State of Colorado. The site is generally bounded by the
following:
• North: Commercial/Retail Center (Choice Center)
• East: South College Avenue
• South: Multi-family residential buildings (Choice Center)
• West: Multi-family residential buildings (Choice Center)
VICINITY MAP
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EXISTING SITE CONDITIONS
THREATENED AND ENDANGERED SPECIES
In accordance with the US Department of the Interior Fish and Wildlife Service, Ecological Services,
Colorado Field Offices list of Threatened, Endangered, Candidate and Proposed Species, printed
January 2017, known threatened or endangered species for the region are as follows:
• Sterna Antillarum – Endangered
• Strix Occidentalis Lucida – Threatened
• Charadius Melodus – Threatened
• Grus Americana – Endangered
• Oncorhynchus Clarki Stomias – Threatened
• Scaphirhynchus Albus – Endangered
• Gaura Neomexicana Var. Coloradensis – Threatened
• Phacelia Formosula – Endangered
• Spiranthes Diluvialis – Threatened
• Platanthera Praeclara – Threatened
• Arsapnia Arapahoe – Candidate
• Lynx Canadensis – Threatened
• Gulo Gulo Luscus – Proposed Threatened
• Zapus Hudsonius Preblei – Threatened
There are no known threatened or endangered species within the project area. The USFW
Endangered Species Listing is included in Appendix C of this report.
WETLANDS
There are no known wetlands/wetland channels within the project area. The property is located within
the City of Fort Collins Federal Emergency Management Agency (FEMA) Flood Insurance Rate Map
Number 08069C0979H, revised May 2, 2012. Although the current FEMA panel shows a portion of
the site within the foodplain (zones AE and AO), a LOMR for Choice Center has been approved
removing the site from the floodplain, effective date July 25, 2014.
DRAINAGE CHARACTERISTICS
Once the Site is completely graded, the topography will generally drain from west to east of the Site.
The site will also utilize an existing drainage flume located on site, that is to be improved. The
developed site will consist of the following:
• Highest Elevation: 4997.70’
• Lowest Elevation: 4986.50’
• Average Slopes: ±2%
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VEGETATION
The existing vegetation on site is minimal, with no grass areas. The composite imperviousness of the
existing site approximately is 95%. The only pervious surface areas are gravel. Once the Project
takes over control of the Site, the existing ground cover will consist of recently disturbed soils and
possible temporary seeding.
SOILS
According to the USDA National Resources Conservation Service (NRCS) Soil Survey, the soils were
found to consist primarily of Fort Collins loam and Altvan-Satanta loams. Onsite soils may be
classified as having a Hydrologic Soil Group of C and B, respectively. Soils of this nature allow for
minimal infiltration into the ground and hence cause increased runoff in storm events. Information
regarding the project site soils is included in Appendix D of this report.
SITE AND DISTURBED AREAS
Site and disturbance areas anticipated for the project construction activities are indicted below:
• Site Area: ±0.36 Acres
• Disturbance Area: ±0.60 Acres
These areas are as indicated on the Erosion Control Plan included in Appendix A.
RAINFALL DATA
Rainfall data was for the 24 hour rainfall was obtained from the Precipitation Frequency Data Server
using NOAA Atlass 14, Volume 8 for the City of Fort Collins and is shown in the following table.
Storm Frequency Rainfall Depth
(Inches)
2-year 1.98
5-year 2.51
10-year 3.04
25-year 3.93
50-year 4.72
100-year 5.61
RECEIVING WATERS
Receiving waters were determined using the City MS4 Permit.
• Immediate Receiving Waters – City of Fort Collins Spring Creek
• Ultimate Receiving Waters – Cache La Poudre River and Fossil Creek Reservoir
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Drainage from the site is directed towards a storm sewer in Choice Center Drive, via a drainage
channel at the west end of the site. The private storm sewer outfalls into a City of Fort Collins publc
sewer near Stuart Street, eventually reaching Spring Creek.
PROPOSED SITE CONDITIONS
PROJECT DESCRIPTION
The proposed project includes a 10-unit multi-family development with a new drive connection to
College Avenue and the adjacent parcel to the north. Runoff for the Site will primarily be directed to
the proposed pervious paver system located between the east and west multi-family buildings. Roof
drains for the proposed buildings will discharge on the surface, directing flow to the pervious pavers.
An underdrain is proposed for the pavers system, routing flow to an 8” storm sewer along the north
end of the site. This storm sewer will discharge flow into the drainage channel along the west property
line. Adequate provisions will also be made to pass a major storm event (100-year storm) through the
development. Since there is a net decrease in percent impervious from existing conditions to
proposed, detention will not be required for the development with respect to stormwater release.
TOPOGRAPHY AND DRAINAGE CHARACTERISTICS
The Site is being graded to direct flow offsite. The majority of runoff will be routed through a permable
paver system to the storm sewer at the south end of the site, discharging into an existing storm sewer
system within Choice Center Drive.
PROPOSED CONSTRUCTION ACTIVITIES
The operator shall utilize the following general construction practices which are required throughout
the project at locations shown on the SWMP or as dictated by construction activities.
· Materials handling and spill prevention
· Waste management and disposal
· Hazardous material storage and containment area
· Vehicle maintenance fueling and storage
· Solid waste containment facility
· Sanitary waste facility
· Street Sweeping (SS)
· SWMP Information Sign (S)
These practices shall remain active and operational throughout the duration of construction and be
identified on the SWMP. Due to any phasing required for the Project, it is understood that these BMPs
may be relocated as needed to facilitate construction operations. The Operator shall locate and
identify the original and current location of these BMPs on the SWMP throughout the construction of
the Project.
General construction sequencing and activities associated with this Project consist of the following:
1. Prepare and submit the City of Fort Collins Excavation Permit and the CDPHE Construction
Stormwater Discharge Permit as required. A copy of the permit(s) shall be provided to the
Site Developer upon receipt from the City/CDPHE.
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2. Install SWMP Information Sign (S) in accordance with applicable City, State, and Site
Developer requirements.
3. Install Vehicle Tracking Control (VTC).
4. Prepare Stabilized Staging Area (SSA). Contractor shall coordinate location with the Overall
Developer and note the actual size and location of this area.
5. Install and denote on the plan any of the following areas: trailer, parking, lay down, porta-
potty, wheel wash, concrete washout, mason's area, fuel and material storage containers,
solid waste containers, etc.
6. Install perimeter controls including Silt Fence (SF) and Rock Sock Perimeter Control (RS)
around limits as shown on plan. Ensure that the Limits of Construction (LOC) are defined as
necessary or known by all parties which will be responsible for construction on the Site.
Construction Fence (CF) shall also be installed and modified, if applicable, on the plan. Limits
of Construction may be located outside of this construction fence.
7. Install Curb Socks (CS) for existing stormwater conveyance facilities as indicated on the
Erosion Control Plans or as necessitated by field conditions.
8. Upon completion of the initial BMP installation the Operator shall schedule a Pre-Construction
Meeting with the City and Site Developer to confirm BMPs installed are adequate prior to
proceeding with additional land disturbing activities.
9. Install Concrete Washout Area (CWA) prior to construction of concrete improvements.
10. Install utilities, storm sewers, curb and gutters.
11. Begin fine grading the Site. Stockpile materials in accordance with the Soil Stockpile
Management (SP) BMP. Permanently stabilize areas to be vegetated as they are brought to
final grade.
12. Start construction of building pad and structures.
13. Complete grading and installation of Permanent Stabilization (PS) over all areas in
accordance with approved Landscape Plans.
14. Remove remaining BMPs once Permanent Stabilization has been achieved and accepted by
City Inspector. Repair and stabilize areas disturbed through BMP removal.
15. Notify the Site Developer of intent to file the Notice of Inactivation with the City/CDPHE and
receive Site Developer acceptance to proceed with stormwater management close-out.
16. Notify the City/CDPHE of the intent to file the Notice of Inactivation and receive City/CDPHE
acceptance prior to proceeding with filing the Notice of Inactivation.
17. Proceed with filing the Notice of Inactivation.
18. Provide the Site Developer with a copy of all stormwater documentation (permits, inspection
reports, logs, etc.) upon completion of project stormwater Notice of Inactivation.
EROSION CONTROL PLAN REQUIREMENTS
The Erosion Control Plans for this project is included within Appendix A of this report and meets the
following minimum requirements:
• Construction Site Boundaries
• Identification of Ground Surface Disturbance
• Areas of Cut / Fill
• Areas of Storage of Building Materials, Equipment, Soil or Waste
• Location of Dedicated Asphalt or Concrete Batch Plants
• Location of Structural BMPs
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• Location of Non-Structural BMPs
• Location of Springs, Streams, Wetlands or other Surface Waters (As Applicable)
STORMWATER MANAGEMENT CONTROLS
SWMP ADMINISTRATOR
The SWMP Administrator is the Operator selected for the project. The SWMP Administrator is
responsible for developing, implementing, maintaining and revising the SWMP. The activities and
responsibilities of the Administrator shall address all aspects of the facility’s SWMP.
SITE SPECIFIC POLLUTION SOURCES
Further identification of site specific pollutants that fall within the categories outlined in the next section
may be field noted using the corresponding log included in the appendices of this report. The logs
are intended to record site specific pollutants, the date of arrival on the site, the date removed from
the site, and the methods of treatment.
IDENTIFICATION OF POLLUTANT SOURCES
Evaluation of general sediment and non-sediment pollution sources associated with site construction
activities, as outlined within the State General Permit, consist of the following:
• Disturbed and Stored Soils – Earth disturbing activities (grading, excavation, etc.) will be
necessary for this project; therefore, the potential exists for disturbed site soils to contribute
sediment to stormwater discharges. Recommended BMPs are identified below:
o Silt Fence
o Temporary Seeding
o Permanent Stabilization
o Inlet Protection
o Rock Socks
o Street Sweeping
• Vehicle Tracking and Sediment – Construction traffic will be entering and exiting the Site;
therefore, the potential exists for vehicle tracking to contribute sediment to stormwater
discharges. Recommended BMPs are identified below:
o Rock Socks
o Street Sweeping
o Vehicle Tracking Control
o Stabilized Staging Area
o Stockpile Management
• Management of Contaminated Soils – Contaminated soils are not anticipated on this Site.
If encountered, the SWMP Administrator shall take appropriate containment and treatment
measures.
• Loading and Unloading Operations – Loading and unloading operations will be taking place
at the Site; therefore, the potential exists for these operations to introduce sediment and non-
sediment pollutants to stormwater discharges. Recommended BMPs are identified below:
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o Covering Outdoor Storage and Handling Areas
o Good Housekeeping Practices
• Outdoor Storage of Materials – Limited outdoor storage of materials is anticipated with
construction of this site; however, outdoor storage of chemicals, fertilizers, etc. is not
anticipated. Recommended BMPs are identified below:
o Covering Outdoor Storage and Handling Areas
o Good Housekeeping Practices
o Spill Prevention Containment and Control
• Vehicle and Equipment Maintenance and Fueling – Routine maintenance and fueling of
vehicles and equipment is anticipated with this Site; therefore, the potential exists for
pollutants associated with these activities to contribute pollutants to stormwater discharges.
Recommended BMPs are identified below:
o Vehicle Equipment Maintenance and Fueling
• Significant Dust or Particulate Generating Processes – Earth disturbing activities (grading,
excavation, etc.) will be necessary for this project; therefore, the potential exists for windblown
site soils to contribute sediment to stormwater discharges. Recommended BMPs are
identified below:
o Wind Erosion / Dust Control
• Routine Maintenance – Routine maintenance involving fertilizers, pesticides, detergents,
fuels, solvents, oils, etc., other than those identified within Vehicle and Equipment
Maintenance and Fueling are not anticipated with this project. If encountered, the SWMP
Administrator shall take appropriate containment and treatment measures. Recommended
BMPs are identified below:
o Preventative Maintenance
• Onsite Waste Management – Waste management consisting of solid waste piles, liquid
wastes, dumpsters, etc. are anticipated onsite; therefore, the potential exists for these
operations to introduce sediment and non-sediment pollutants to stormwater discharges.
Recommended BMPs are identified below:
o Good Housekeeping
• Concrete Truck / Equipment Washing – Concrete truck and equipment washing are
anticipated with this project. The SWMP Administrator shall take appropriate containment
and treatment measures. Recommended BMPs are identified below:
o Concrete Washout Area
• Dedicated Asphalt and Concrete Batch Plants – Dedicated asphalt and/or concrete batch
plants are not anticipated with this project. If encountered, the SWMP Administrator shall take
appropriate containment and treatment measures and document as necessary.
• Non-Industrial Waste Sources – Non-Industrial waste sources limited to portable sanitary
facilities are anticipated with this project. Recommended BMPs are identified below:
o Good Housekeeping
• Additional Pollutant Sources – Additional areas or procedures where potential spills could
occur are not anticipated with this project.
Logs for the identification of pollutant sources are included in Appendix E for reference and use.
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Based on the following, the potential to contribute pollutants to stormwater discharges is not
significant for most of the pollutants identified above:
• Relatively Low Frequency of the Activities
• The Ability to Schedule Activities During Dry Weather
• Existing Site Topography
• The Ability to Implement Primary and Secondary Containment for Product Storage
• The Ability to Locate Activities Away from Drainage Ways
BEST MANAGEMENT PRACTICES FOR STORMWATER POLLUTION PREVENTION
STRUCTURAL PRACTICES FOR EROSION AND SEDIMENT CONTROL
Structural BMPs shall be implemented onsite to minimize erosion and sediment transport.
Recommended BMPs based upon a limited site review may be seen within the Erosion Control Plan
included in the appendices of this report. Additional BMPs shall be implemented by the SWMP
Administrator if necessary to prevent sediment laden runoff from leaving the project site. The SWMP
and Erosion Control Plan shall be updated to reflect any changes or revisions enacted in the field.
Details of the BMPs proposed for the Site are included in Appendix F.
NON-STRUCTURAL PRACTICES FOR EROSION AND SEDIMENT CONTROL
Non-Structural BMPs shall be implemented onsite to minimize erosion and sediment transport.
Recommended BMPs based upon a limited site review may be seen within the Erosion Control Plan
included in the appendices of this report. Additional BMPs shall be implemented by the SWMP
Administrator if necessary to prevent sediment laden runoff from leaving the project site. The SWMP
and Erosion Control Plan shall be updated to reflect any changes or revisions enacted in the field.
Details of the BMPs proposed for the Site are included in Appendix F.
PHASED BMP IMPLEMENTATION
Since the existing site is in an undeveloped condition, construction of the identified improvements will
take place under one phase of construction as identified within the construction sequencing included
within this report.
A Land Disturbance, BMP Installation, and Stabilization Log is provided in Appendix G and shall be
filled out accordingly during BMP implementation.
MATERIALS HANDLING AND SPILL PREVENTION
Any hazardous or potentially hazardous material that is brought onto the construction site shall be
handled properly in order to reduce the potential for stormwater pollution. In an effort to minimize the
potential for a spill of petroleum product or hazardous materials to come in contact with stormwater,
the following steps shall be implemented:
• Material Safety Data Sheets (MSDS) information shall be kept on site for any and all
applicable materials.
• All materials with hazardous properties (such as pesticides, petroleum products, fertilizers,
detergents, construction chemicals, acids, paints, paint solvents, additives for soil
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stabilization, concrete, curing compounds and additives, etc.) shall be stored in a secure
location, under cover and in appropriate, tightly sealed containers when not in use.
• The minimum practical quantity of all such materials shall be kept on the job site and
scheduled for delivery as close to time of use as practical.
• A spill control and containment kit shall be provided on the construction site and location(s)
shown on the Erosion Control Plan.
• All of the product in a container shall be used before the container is disposed of. All such
containers shall be triple rinsed, with water prior to disposal. The rinse water used in these
containers shall be disposed of in a manner in compliance with State and Federal regulations
and shall not be allowed to mix with stormwater discharges.
• All products shall be stored in and used from the original container with the original product
label and used in strict compliance with the instructions on the product label.
• The disposal of excess or used products shall be in strict compliance with instructions on the
product label.
If utilized, temporary onsite 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.
The tanks shall be in sound condition free of rust or other damage which might compromise
containment. Fuel storage areas shall meet all Environmental Protection Agency (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 Erosion Control Plan and shall be located to minimize
exposure to weather and surface water drainage features.
The Operator shall develop and implement a Materials Handling and Spill Prevention Plan (MHSPP)
in accordance with the EPA and State of Colorado requirements. In the event of an accidental spill,
immediate action shall be undertaken by the Operator to contain and remove the spilled material. All
hazardous materials, including contaminated soil, shall be disposed of by the Operator in the manner
specified by federal, state and local regulations and by the manufacturer of such products. As soon
as possible, the spill shall 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 shall be properly
reported. The Operator shall prepare a written record of any spill and associated clean-up activities
of petroleum products or hazardous materials in excess of 1 gallon or reportable quantities, whichever
is less.
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 Colorado
Department of Public Health and Environment spill reporting lines. CDPHE Environmental Release
and Incident Reporting Line (877) 518-5608. For reference, a bulletin on Environmental Spill
Reporting published by the CDPHE, has been included in Appendix H of this report.
Choice Center Third Filing– Fort Collins, CO
May 2017 Page 21
VEHICLE TRACKING AND DUST CONTROL
Vehicle Tracking Control BMPs (structural and non-structural) shall be implemented in order to control
potential sediment discharges from vehicle tracking. Practices shall be implemented for all areas of
potential vehicle tracking which include, but are not limited to reduced site access and utilization of
designated haul routes.
Areas of soil that are denuded of vegetation and have little protection from particles being picked up
and carried by wind should be protected with a temporary cover or kept under control with water or
other soil adhering products to limit wind transported particles exiting the site perimeter.
WASTE MANAGEMENT AND DISPOSAL
An effective first step towards preventing pollution in stormwater from work sites involves using a
common sense approach to improve the facility’s basic housekeeping methods. Poor housekeeping
practices result in increased waste and potential for stormwater contamination.
No solid materials are allowed to be discharged from the site with stormwater. All solid waste,
including disposable materials incidental to the construction activities, must be collected and placed
in containers. Secure covers for the containers shall be provided at all times to meet state and local
requirements. The location of solid waste receptacles shall be identified on the Erosion Control Plan
by the Operator.
Concrete waste is anticipated with this project; and therefore, a dedicated concrete washout is
required. The SWMP Administrator shall take appropriate containment and treatment measures and
document as necessary.
GROUNDWATER AND STORMWATER DEWATERING
Except as noted below, all discharges covered by this permit shall be composed entirely of
stormwater associated with construction activity.
• Emergency Fire Fighting Activities
• Uncontaminated Spring Water
• Landscape Irrigation Return Flow
Groundwater dewatering is not anticipated. If encountered, the operator shall file for appropriate
permits with the CDPHE.
FINAL STABILIZATION AND LONG TERM STORMWATER MANAGEMENT
In the natural condition, the site soil is stabilized by means of vegetation and pavement/gravel.
Therefore, the final stabilization technique to be used at this project for stabilizing soils shall be to
provide a protective cover of vegetation, gravel road base, and granular stabilization material.
Seeding should be conducted after final grade is achieved and soils are prepared to take advantage
of soil moisture and seed germination. The SWMP Administrator should evaluate the short and long-
term forecasts prior to applying permanent seed.
Choice Center Third Filing– Fort Collins, CO
May 2017 Page 22
Native Seed Information: Short Grass Mix by Applewood Seed Company (Or Equal)
Seeding Rate: 3 LBS/ACRE
Scientific Name Common Name
Bouteloua Gracilis Blue Grama
Bouteloua Curtipendula Sideoats Grama
Sporobolus Cryptandrus Sand Dropseed
Koeleria Macrantha Prairie Junegrass
Final site stabilization is achieved when vegetative cover provides permanent stabilization with a
density greater than 70 percent of the pre-disturbance levels, or equivalent permanent, physical
erosion reduction methods have been employed over the entire area to be stabilized by vegetative
cover. This area is exclusive of areas that are covered with rock (crushed granite, gravel, etc.) or
landscape mulch, paved or have a building or other permanent structure on them.
INSPECTION REQUIREMENTS
INSPECTION SCHEDULE REQUIREMENTS
A thorough inspection of the stormwater management system shall be performed and documented
at least every 14 days and within after each runoff event. If more frequent inspections are required to
ensure that BMPs are properly maintained and operated, the inspection schedule shall be modified
to meet this need.
INSPECTION PROCEDURES
A thorough inspection of the stormwater management system shall be performed and documented
at least every 14 days and within after each runoff event. If more frequent inspections are required to
ensure that BMPs are properly maintained and operated, the inspection schedule shall be modified
to meet this need.
The inspection shall include observations of:
• The Construction Site Perimeter and Discharge Points;
• All Disturbed Areas;
• Areas Used for Material / Waste Storage That are Exposed to Precipitation;
• Other Areas Determined to Have a Significant Potential for Stormwater Pollution;
• Erosion and Sediment Control Measures Identified in the SWMP; and
• Any Other Structural BMPs That May Require Maintenance.
The inspection must determine if there is evidence of, or the potential for, pollutants entering the
drainage system. BMPs should be reviewed to determine if they still meet the design intent and
operational criteria in the SWMP and if they continue to adequately control pollutants at the site. Any
BMPs not operating in accordance with the SWMP must be addressed as soon as possible,
immediately in most cases, to minimize the discharge of pollutants and the SWMP must be updated
and inspections must be documented.
Choice Center Third Filing– Fort Collins, CO
May 2017 Page 23
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 shall 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.
• Vehicle Tracking Control - Locations where vehicles enter and exit the site shall be
inspected for evidence of offsite sediment tracking. Exits shall be maintained as necessary
to prevent the release of sediment from vehicles leaving the site. Any sediment deposited on
the adjacent roadway shall be removed 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.
• 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 frequently. Rilling, rutting and other signs of erosion
indicate the erosion control device is not functioning properly and additional erosion control
devices are warranted.
• Sediment Control Devices - Sediment barriers (silt fence, sediment control logs, etc.), traps
and basins must be inspected and they must be cleaned out at such time as their original
capacity has been reduced by 50 percent. All material excavated from behind sediment
barriers or in traps and basins shall be incorporated into onsite soils or spread out on an
upland portion of the site and stabilized. To minimize the potential for sediment releases from
the Project, site perimeter control devices shall be inspected with consideration given to
changing up-gradient conditions.
• 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 shall be adhered to.
• Vegetation - Seed/Sod shall be free of weedy species and appropriate for site soils and
regional climate. Seeding, sodding, tacking, and mulching shall be completed, in accordance
with the requirements outlined within the Project Manual and locations identified within the
plans, immediately after topsoil is applied and final grade is reached. Grassed areas shall be
inspected to confirm that a healthy stand of grass is maintained. Rip-rap, mulch, gravel,
decomposed granite or other equivalent permanent stabilization measures may be employed
in lieu of vegetation based on site-specific conditions and Site Developer approval.
• 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.
Choice Center Third Filing– Fort Collins, CO
May 2017 Page 24
All necessary maintenance and repair shall be completed immediately. The inspection reports must
be completed after each inspection. An important aspect of the inspection report is the description
of additional measures that need to be taken to enhance plan effectiveness. The inspection report
must identify whether the site was in compliance with the SWMP at the time of inspection and
specifically identify all incidents of non-compliance.
The SWMP Administrator shall ensure that, at a minimum, the following is recorded for each
inspection and kept onsite for reference:
• Inspection Date
• Name(s) and Title(s) of Inspection Personnel
• Location(s) of Discharges of Sediment and Other Pollutants from the Site
• Location(s) of BMPs Requiring Maintenance
• Location(s) of Failed BMPs
• Location(s) of Additional Required BMPs
• Deviations from the Minimum Inspections Schedule (If Applicable)
• Description of Corrective Actions
• Certification of SWMP Compliance after adequate corrective action(s) taken, or where a report
does not identify any incidents requiring corrective action, this certification shall be made by
the inspector indicating compliance with the permit
The use and maintenance of log books, photographs, field notebooks, drawings or maps should also
be included in the SWMP records when appropriate. Copies of the Inspection Form and BMP
Corrective Action Log have been included in Appendix I and Appendix J for reference and use.
BMP MAINTENANCE / REPLACEMENT AND FAILED BMPS
Site inspection procedures noted above must address maintenance of BMPs that are found to no
longer function as needed and designed, as well as preventive measures to proactively ensure
continued operation.
The SWMP Administrator shall implement a preventative maintenance program to ensure that BMP
breakdowns and failures are handled proactively. Site inspections should uncover any conditions
which could result in the discharge of pollutants to storm sewers and surface waters and shall be
rectified. For example, sediment shall be removed from silt fences on a regular basis to prevent
failure of the BMP. Sediment shall be removed to an appropriate location so that it will not become
an additional pollutant source.
The inspection process must also include replacement of BMPs when needed or the addition of new
BMPs in order to adequately manage the pollutant sources at the site. Any BMP deficiencies,
replacement or additional BMPs that may be required shall be documented on the Erosion Control
Plans and on the appropriate Inspection Form. If amendments to the SWMP are required, these
amendments shall be documented on the SWMP Amendment Log included in Appendix J for
reference and use.
Choice Center Third Filing– Fort Collins, CO
May 2017 Page 25
CONCLUSIONS
Temporary erosion control measures and BMPs will enhance stormwater quality within the project
area by capturing and detaining sediment-laden runoff prior to discharging off-site.
REFERENCES
City of Fort Collins Amendments to the Urban Drainage and Flood Control District Criteria Manual –
As referenced in Section 26-500 (c) of the Code of the City of Fort Collins; Revised
Colorado Discharge Permit System (CDPS) – Stormwater Discharge Associated with Construction
Activities Application - Prepared by Water Quality Control Division, Colorado Department of Public
Health and Environment; Revised April 2011.
NRCS Web Soil Survey - Website: https://websoilsurvey.nrcs.usda.gov/app/WebSoilSurvey.aspx.
Precipitation-Frequency Atlas of the Western United States - NOAA ATLAS 14, Volume VIII, Version
2-Fort Collins, Colorado, USA. Prepared by the US Department of Commerce, National Oceanic and
Atmospheric Administration and National Weather Service.
Stormwater Discharges Associated with Construction Activity – Stormwater Management Plan
Preparation Guidance - Prepared by Water Quality Control Division, Colorado Department of Public
Health and Environment; Revised April 2011.
Threatened, Endangered, Candidate and Proposed Species - Prepared by US Department of the
Interior, Fish and Wildlife Services, Ecological Services, Colorado Field Offices; printed January
2017.
Urban Storm Drainage Criteria Manual – Volume 3 – Prepared by the Urban Drainage and Flood
Control District; Current Revision November 2010.
Choice Center Third Filing– Fort Collins, CO
May 2017 Page 26
APPENDIX
APPENDIX A – EROSION CONTROL PLANS
APPENDIX B – CITY OF FORT COLLINS PERMITS
APPENDIX C – USFWS ENDANGERED SPECIES LISTING
APPENDIX D – SOILS INFORMATION
APPENDIX E – IDENTIFICATION OF POLLUTANT SOURCES
APPENDIX F – BMP DETAILS
APPENDIX G –BMP INSTALLATION LOG
APPENDIX H – SWMP INSPECTION REPORTS
APPENDIX I – BMP CORRECTIVE ACTION LOG
APPENDIX J – SWMP AMENDMENT LOG
APPENDIX K – EROSION AND SEDIMENT CONTROL ESCROW/SECURITY CALCULATION
Exhibit A – Erosion Control Plan & Details
UNIT 102
COLLEGE AVENUE
CHOICE CENTER DRIVE
UNIT 101
UNIT 105
UNIT 103
UNIT 106
UNIT 104
BUILDING A
CHOICE CENTER
THIRD FILING
FORT COLLINS, CO 80525
CHOICE CENTER THIRD FILING
EROSION CONTROL LEGEND
EROSION CONTROL SCHEDULE AND SEQUENCING:
Know what's below.
Call before you dig.
NORTH
4 OF 12
EROSION CONTROL
PLAN
CHOICE CENTER
THIRD FILING
FORT COLLINS, CO 80525
CHOICE CENTER THIRD FILING
5 OF 12
EROSION CONTROL
NOTES & DETAILS
Mobilization Demolition Grading
Utilities
Installation
Flat work
Installation
Vertical
Installation Landscape Demobilization (Construction Phases)
Best Management Practices (BMPs)
Structural "Installation"
Silt Fence Barriers*
Contour Furrows (Ripping / Disking)
Sediment Trap / Filter
Vehicle Tracking Pad*
Flow Barriers (Wattles)*
Inlet Filter Bags*
Any prior inlets
that could use
protecting
Rock Bags*
Any prior inlets
that could use
protecting
Terracing
Stream Flow Diversion*
Rip Rap
Collecting Asphalt / Concrete Saw Cutting Waste
*All BMPs to be Removed once Construction is Complete.
Vegetative
Temporary Seeding Planting
Any time the
site will sit
dorment
longer than
30 Days.
Mulching/Sealant
Any time the
site will sit
dorment
longer than
30 Days.
Permanent Seeding Planting
Sod Installation
Rolled Products : Netting/Blankets/Mats
Any time the
site will sit
dorment
longer than
30 Days.
Other:
EROSION CONTROL NOTES
CITY OF FORT COLLINS EROSION CONTROL NOTES
Exhibit B – Colorado Department of Public
Health and Environment Permit
STORMWATER DISCHARGE ASSOCIATED WITH CONSTRUCTION ACTIVITIES APPLICATION
COLORADO DISCHARGE PERMIT SYSTEM (CDPS)
PHOTO COPIES, FAXED COPIES, PDF COPIES OR EMAILS WILL NOT BE ACCEPTED.
For Applications submitted on paper - Please print or type. Original signatures are required.
All items must be completed accurately and in their entirety for the application to be deemed complete. Incomplete applications will not be processed
until all information is received which will ultimately delay the issuance of a permit. If more space is required to answer any question, please attach
additional sheets to the application form. Applications or signature pages for the application may be submitted by mail or hand delivered to:
Colorado Department of Public Health and Environment, 4300 Cherry Creek Drive South, WQCD-P-B2, Denver, CO 80246-1530
For Applications submitted electronically
Please note that you can ONLY complete the feedback form by downloading it to a PC or Mac/Apple computer and opening the Application with Adobe
Reader or a similar PDF reader. The form will NOT work with web browsers, Google preview, Mac preview software or on mobile devices using iOS or
Android operating systems.
If application is submitted electronically, processing of the application will begin at that time and not be delayed for receipt of the signed document.
Any additional information that you would like the Division to consider in developing the permit should be provided with the application. Examples
include effluent data and/or modeling and planned pollutant removal strategies.
Beginning July 1, 2016, invoices will be based on acres disturbed.
DO NOT PAY THE FEES NOW – Invoices will be sent after the receipt of the application.
Disturbed Acreage for this application (see page 4)
Less than 1 acre ($83 initial fee, $165 annual fee)
1-30 acres ($175 initial fee, $350 annual fee)
Greater than 30 acres ($270 initial fee, $540 annual fee)
Responsible Person (Title):
PERMIT INFORMATION
Reason for Application: NEW CERT
RENEW CERT EXISTING CERT#
Applicant is: Property Owner
Contractor/Operator
A. CONTACT INFORMATION - *indicates required
* PERMITTED ORGANIZATION FORMAL NAME:
1) * PERMIT OPERATOR - the party that has operational control over day to day activities - may be the same as owner.
Currently Held By (Person): FirstName: LastName:
Telephone: Email Address:
Organization:
Mailing Address:
City: State: Zip Code:
Per Regulation 61 : All reports required by permits, and other information requested by the Division shall be signed by the permittee or by a duly
authorized representative of that person. A person is a duly authorized representative only if:
(i) The authorization is made in writing by the permittee
(ii) The authorization specifies either an individual or a position having responsibility for the overall operation of the regulated facility or
activity such as the position of plant manager, operator of a well or a well field, superintendent, position of equivalent responsibility, or
an individual or position having overall responsibility for environmental matters for the company. (A duly authorized representative
may thus be either a named individual or any individual occupying a named position); and
(iii) The written authorization is submitted to the Division
SW Construction Application for: page 1 of 5
ASSIGNED PERMIT NUMBER
_____________________________
Date Received _____/_____/_____
MM DD YYYY
Revised: 3-2016
✔
✔
✔
Core Fort Collins LLC
Senior Development Manager
Mark Goehausen
(773) 969-5748 markg@corespaces.com
Core Fort Collins LLC
2234 W. North Avenue
Chicago IL 60647
Core Fort Collins LLC
Responsible Person (Title):
2) OWNER - party has ownership or long term lease of property - may be the same as the operator.
Currently Held By (Person): FirstName: LastName:
Telephone: Email Address:
Organization:
Mailing Address:
City: State: Zip Code:
Same as 1) Permit Operator
Per Regulation 61 : All reports required by permits, and other information requested by the Division shall be signed by the permittee or by a duly
authorized representative of that person. A person is a duly authorized representative only if:
i. The authorization is made in writing by the permittee.
ii. The authorization specifies either an individual or a position having responsibility for the overall operation of the regulated facility or
activity such as the position of plant manager, operator of a well or a well field, superintendent, position of equivalent responsibility, or an
individual or position having overall responsibility for environmental matters for the company. (A duly authorized representative may thus
be either a named individual or any individual occupying a named position); and
iii. The written authorization is submitted to the Division.
Responsible Person (Title):
Currently Held By (Person): FirstName: LastName:
Telephone: Email Address:
Organization:
Mailing Address:
City: State: Zip Code:
Same as 1) Permit Operator
4) *BILLING CONTACT if different than the permittee.
3) *SITE CONTACT local contact for questions relating to the facility & discharge authorized by this permit for the facility
Responsible Person (Title):
Currently Held By (Person): FirstName: LastName:
Telephone: Email Address:
Organization:
Mailing Address:
City: State: Zip Code:
Same as 1) Permit Operator
SW Construction Application for: page 2 of 5
Responsible Person (Title):
5) OTHER CONTACT TYPES (check below) Add pages if necessary:
Currently Held By (Person): FirstName: LastName:
Telephone: Email Address:
Organization:
Mailing Address:
City: State: Zip Code:
Environmental Contact
Inspection Facility Contact
Consultant
Compliance Contact
Stormwater MS4 Responsible Person
Stormwater Authorized Representative
✔
Senior Development Manager
Mark Goehausen
(773) 969-5748 markg@corespaces.com
Core Fort Collins LLC
2234 W. North Avenue
Chicago IL 60647
Civil Engineering Consultant - Project Manager
Lesley Netzer
(630) 487-5555 lesley.netzer@kimley-horn.com
Kimley-Horn and Associates, Inc.
1001 Warrenville Road, Suite 350
Lisle IL 60532
Civil Engineering Consultant - Professional Engineer
B) PERMITTED PROJECT/FACILITY INFORMATION
Latitude
Project/Facility Name
Street Address or Cross Streets
(e.g., Park St and 5 Ave; CR 21 and Hwy 10; 44 Ave and Clear Creek) ; A street name without an address, intersection, mile marker, or other
identifying information describing the location of the project is not adequate. For linear projects, the route of the project should be described as
best as possible using the starting point for the address and latitude and longitude – more clearly defined in the required map )
Facility Latitude/Longitude - List the latitude and longitude of the excavation(s) resulting in the discharge(s). If the exact soil disturbing location(s)
are not known, list the latitude and longitude of the center point of the construction project. If using the center point, be sure to specify that it is
the center point of construction activity. The preferred method is GPS and Decimal Degrees.
. Longitude
Decimal Degrees (to 5 decimal places)
.
Decimal Degrees (to 5 decimal places)
(e.g., 39.70312°, 104.93348°)
This information may be obtained from a variety of sources, including:
Surveyors or engineers for the project should have, or be able to calculate, this information.
U.S. Geological Survey topographical map(s), available at area map stores.
Using a Global Positioning System (GPS) unit to obtain a direct reading.
Google - enter address in search engine, select the map, right click on location, and select “what’s here”.
Note: the latitude/longitude required above is not the directional degrees, minutes, and seconds provided on a site legal description to define
property boundaries.
C) MAP (Attachment) If no map is submitted, the application cannot be submitted.
Map: Attach a map that indicates the site location and that CLEARLY shows the boundaries of the area that will be disturbed. A vicinity map is not
adequate for this purpose.
Legal description: If subdivided, provide the legal description below, or indicate that it is not applicable (do not supply Township/Range/Section
or metes and bounds description of site)
Subdivision(s): Lot(s):
Block(s)
OR
Not applicable (site has not been subdivided)
SW Construction Application for: page 3 of 5
City: County: Zip Code:
D) LEGAL DESCRIPTION - only for Subdivisions
Total area of project disturbance site (acres):
E) AREA OF CONSTRUCTION SITE - SEE PAGE 1 - WILL DETERMINE FEE
Note: aside from clearing, grading and excavation activities, disturbed areas also include areas receiving overburden (e.g., stockpiles), demolition areas, and areas
with heavy equipment/vehicle traffic and storage that disturb existing vegetative cover.
Part of Larger Common Plan of Development or Sale, (i.e., total, including all phases, filings, lots, and infrastructure not covered by this application)
Provide both the total area of the construction site, and the area that will undergo disturbance, in acres.
Commercial Development
Non-structural and other development (i.e. parks, trails, stream realignment, bank stabilization, demolition, etc.)
F) NATURE OF CONSTRUCTION ACTIVITY
Check the appropriate box(es) or provide a brief description that indicates the general nature of the construction activities. (The full description of activities must be
included in the Stormwater Management Plan.)
Residential Development
Highway and Transportation Development
Pipeline and Utilities (including natural gas, electricity, water, and communications)
Oil and Gas Exploration and Well Pad Development
Choice Center Third Filing
1751 S. College Avenue
Fort Collins Larimer 80525
40 56422 -105 07751
✔
0.60
✔
Core Fort Collins LLC
SW Construction Application for: page 4 of 5
G) ANTICIPATED CONSTRUCTION SCHEDULE
Construction Start Date: Final Stabilization Date:
Construction Start Date - This is the day you expect to begin ground disturbing activities, including grubbing, stockpiling, excavating, demolition,
and grading activities.
Final Stabilization Date - in terms of permit coverage, this is when the site is finally stabilized. This means that all ground surface disturbing
activities at the site have been completed, and all disturbed areas have been either built on, paved, or a uniform vegetative cover has been
established with an individual plant density of at least 70 percent of pre-disturbance levels. Permit coverage must be maintained until the site is
finally stabilized. Even if you are only doing one part of the project, the estimated final stabilization date must be for the overall project.
If permit coverage is still required once your part is completed, the permit certification may be transferred or reassigned to a new responsible
entity(s).
H) RECEIVING WATERS (If discharge is to a ditch or storm sewer, include the name of the ultimate receiving waters)
Immediate Receiving Water(s):
Ultimate Receiving Water(s):
Identify the receiving water of the stormwater from your site. Receiving waters are any waters of the State of Colorado. This includes all water courses, even if they
are usually dry. If stormwater from the construction site enters a ditch or storm sewer system, identify that system and indicate the ultimate receiving water for the
ditch or storm sewer. Note: a stormwater discharge permit does not allow a discharge into a ditch or storm sewer system without the approval of the owner/
operator of that system.
April 1, 2018 September 1, 2018
Spring Creek
Cache La Poudre River
Core Fort Collins LLC
I) SIGNATURE PAGE
STORMWATER MANAGEMENT PLAN CERTIFICATION
Ink Signature
For Docusign
Electronic Signature
1. You may print and sign this document and mail the hard copy to the State along with required documents (address on page one).
2. Electronic Submission Signature
You may choose to submit your application electronically, along with required attachments. To do so, click the SUBMIT button below which will direct you, via
e-mail , to sign the document electronically using the DocuSign Electronic Signature process. Once complete, you will receive via e-mail, an electronically
stamped Adobe pdf of this application. Print the signature page from the electronically stamped pdf, sign it and mail it to the WQCD Permits Section to complete
the application process (address is on page one of the application).
The Division encourages use of the electronic submission of the application and electronic signature. This method meets signature requirements as
required by the State of Colorado.
The ink signed copy of the electronically stamped pdf signature page is also required to meet Federal EPA Requirements.
Processing of the application will begin with the receipt of the valid electronic signature.
By checking this box “I certify under penalty of law that a complete Stormwater Management Plan, as described in Appendix B of this application, has been pre-
pared for my activity. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information,
the Stormwater Management Plan is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for
falsely certifying the completion of said SWMP, including the possibility of fine and imprisonment for knowing violations.”
Date:
Signature of Legally Responsible Person or Authorized Agent (submission must include original signature)
Name (printed) Title
"I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to
assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or
those persons directly responsible for gathering the information, the information submitted is to the best of my knowledge and belief, true, accurate and complete.
I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations."
“I understand that submittal of this application is for coverage under the State of Colorado General Permit for Stormwater Discharges Associated with Construction
Activity for the entirety of the construction site/project described and applied for, until such time as the application is amended or the certification is
transferred, inactivated, or expired.” [Reg 61.4(1)(h)]
DO NOT INCLUDE A COPY OF THE STORMWATER MANAGEMENT PLAN
DO NOT INCLUDE PAYMENT—AN INVOICE WILL BE SENT AFTER THE CERTIFICATION IS ISSUED.
Signature: The applicant must be either the owner and operator of the construction site. Refer to Part B of the instructions for additional information.
The application must be signed by the applicant to be considered complete. In all cases, it shall be signed as follows:
(Regulation 61.4 (1ei)
a) In the case of corporations, by the responsible corporate officer is responsible for the overall operation of the facility from which the discharge described in
the form originates
b) In the case of a partnership, by a general partner.
c) In the case of a sole proprietorship, by the proprietor.
d) In the case of a municipal, state, or other public facility, by either a principal executive officer, ranking elected official, (a principal executive officer has
responsibility for the overall operation of the facility from which the discharge originates).
SW Construction Application for: page 5 of 5
3rd Party Preparer: If this form was prepared by an authorized agent on behalf of the Permittee, please complete the field below.
Preparer Name (printed) Email Address
✔
Mark Goehausen Senior Development Manager
Bryce Christensen bryce.christensen@kimley-horn.com
K:\CHS_LDEV\168450002_CORE_FortCollins_CO_(College)\6 Permits & Apps\State of Colorado\Aerial Map\AERIAL MAP.pdf
Core Fort Collins LLC
Attach Map
Attach File
Attach File
Attach File
Attach File
Submit
PROJECT
LOCATION
COLLEGE AVENUE
AERIAL MAP
(N.T.S.)
SHEET NUMBER
1 OF 1
NORTH
CHOICE CENTER THIRD FILING
1751 S. COLLEGE AVENUE
FORT COLLINS, CO 80525
Exhibit C – USFWS Endangered Species
Listing
IPaC resource list
Project information
NAME
CORE - Fort Collins_College Avenue
LOCATION
Larimer County, Colorado
DESCRIPTION
Choice
Center Filing
Local office
Colorado Ecological Services Field Office
(303) 236-4773
(303) 236-4005
MAILING ADDRESS
Denver Federal Center
P.o. Box 25486
Denver, CO 80225-0486
IPaC U.S. Fish & Wildlife Service
IPaC: Resources Page 1 of 11
https://ecos.fws.gov/ipac/project/TXNIR4OKHJFDJJBW3HK7GOO4DE/resources 1/30/2017
PHYSICAL ADDRESS
134 Union Boulevard, Suite 670
Lakewood, CO 80228-1807
http://www.fws.gov/coloradoES
http://www.fws.gov/platteriver
Endangered species
This resource list is for informational purposes only and should not be used for
planning or analyzing project level impacts.
Section 7 of the Endangered Species Act requires Federal agencies to “request of
the Secretary information whether any species which is listed or proposed to be
listed may be present in the area of such proposed action” for any project that is
conducted, permitted, funded, or licensed by any Federal agency.
A letter from the local office and a species list which fulfills this requirement
can only be obtained by requesting an official species list either from the
Regulatory Review section in IPaC or from the local field office directly.
For project evaluations that require USFWS concurrence/review, please return to
the IPaC website and request an official species list by creating a project and
making a request from the Regulatory Review section.
Listed species
are managed by the Endangered Species Program of the U.S. Fish and Wildlife
Service.
1. Species listed under the Endangered Species Act are threatened or endangered;
IPaC also shows species that are candidates, or proposed, for listing. See the listing
status page for more information.
The following species are potentially affected by activities in this location:
1
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Birds
Fishes
NAME STATUS
Least Tern Sterna antillarum
No critical habitat has been designated for this species.
http://ecos.fws.gov/ecp/species/8505
Endangered
Mexican Spotted Owl Strix occidentalis lucida
There is a final critical habitat designated for this species.
Your location is outside the designated critical habitat.
http://ecos.fws.gov/ecp/species/8196
Threatened
Piping Plover Charadrius melodus
There is a final critical habitat designated for this species.
Your location is outside the designated critical habitat.
http://ecos.fws.gov/ecp/species/6039
Threatened
Whooping Crane Grus americana
There is a final critical habitat designated for this species.
Your location is outside the designated critical habitat.
http://ecos.fws.gov/ecp/species/758
Endangered
NAME STATUS
Greenback Cutthroat Trout Oncorhynchus clarki
stomias
No critical habitat has been designated for this species.
http://ecos.fws.gov/ecp/species/2775
Threatened
Pallid Sturgeon Scaphirhynchus albus
No critical habitat has been designated for this species.
http://ecos.fws.gov/ecp/species/7162
Endangered
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Flowering Plants
Insects
Mammals
NAME STATUS
Colorado Butterfly Plant Gaura neomexicana var.
coloradensis
There is a final critical habitat designated for this species.
Your location is outside the designated critical habitat.
http://ecos.fws.gov/ecp/species/6110
Threatened
North Park Phacelia Phacelia formosula
No critical habitat has been designated for this species.
http://ecos.fws.gov/ecp/species/123
Endangered
Ute Ladies'-tresses Spiranthes diluvialis
No critical habitat has been designated for this species.
http://ecos.fws.gov/ecp/species/2159
Threatened
Western Prairie Fringed Orchid Platanthera praeclara
No critical habitat has been designated for this species.
http://ecos.fws.gov/ecp/species/1669
Threatened
NAME STATUS
Arapahoe Snowfly Arsapnia arapahoe
No critical habitat has been designated for this species.
http://ecos.fws.gov/ecp/species/9141
Candidate
NAME STATUS
Canada Lynx Lynx canadensis
There is a final critical habitat designated for this species.
Your location is outside the designated critical habitat.
http://ecos.fws.gov/ecp/species/3652
Threatened
North American Wolverine Gulo gulo luscus
No critical habitat has been designated for this species.
http://ecos.fws.gov/ecp/species/5123
Proposed Threatened
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Critical habitats
Potential effects to critical habitat(s) in this location must be analyzed along with
the endangered species themselves.
THERE ARE NO CRITICAL HABITATS AT THIS LOCATION.
Migratory birds
Preble's Meadow Jumping Mouse Zapus hudsonius
preblei
There is a final critical habitat designated for this species.
Your location is outside the designated critical habitat.
http://ecos.fws.gov/ecp/species/4090
Threatened
Birds are protected under the Migratory Bird Treaty Act
and the Bald and Golden Eagle Protection Act .
Any activity that results in the take (to harass, harm, pursue, hunt, shoot, wound, kill,
trap, capture, or collect, or to attempt to engage in any such conduct) of migratory
birds or eagles is prohibited unless authorized by the U.S. Fish and Wildlife Service
. There are no provisions for allowing the take of migratory birds that are
unintentionally killed or injured.
Any person or organization who plans or conducts activities that may result in the
take of migratory birds is responsible for complying with the appropriate regulations
and implementing appropriate conservation measures.
1. The Migratory Birds Treaty Act of 1918.
2. The Bald and Golden Eagle Protection Act of 1940.
3. 50 C.F.R. Sec. 10.12 and 16 U.S.C. Sec. 668(a)
Additional information can be found using the following links:
• Birds of Conservation Concern http://www.fws.gov/birds/management/managed-
species/
birds-of-conservation-concern.php
1 2
3
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The migratory birds species listed below are species of particular conservation
concern (e.g. Birds of Conservation Concern) that may be potentially affected by
activities in this location, not a list of every bird species you may find in this location.
Although it is important to try to avoid and minimize impacts to all birds, special
attention should be made to avoid and minimize impacts to birds of priority concern.
To view available data on other bird species that may occur in your project area,
please visit the AKN Histogram Tools and Other Bird Data Resources.
• Conservation measures for birds http://www.fws.gov/birds/management/project-
assessment-tools-and-guidance/
conservation-measures.php
• Year-round bird occurrence data
http://www.birdscanada.org/birdmon/default/datasummaries.jsp
NAME SEASON(S)
American Bittern Botaurus lentiginosus
http://ecos.fws.gov/ecp/species/6582
Breeding
Bald Eagle Haliaeetus leucocephalus
http://ecos.fws.gov/ecp/species/1626
Year-round
Black Rosy-finch Leucosticte atrata
http://ecos.fws.gov/ecp/species/9460
Year-round
Black Swift Cypseloides niger
http://ecos.fws.gov/ecp/species/8878
Breeding
Brewer's Sparrow Spizella breweri
http://ecos.fws.gov/ecp/species/9291
Breeding
Burrowing Owl Athene cunicularia
http://ecos.fws.gov/ecp/species/9737
Breeding
Cassin's Finch Carpodacus cassinii
http://ecos.fws.gov/ecp/species/9462
Year-round
Dickcissel Spiza americana Breeding
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Ferruginous Hawk Buteo regalis
http://ecos.fws.gov/ecp/species/6038
Year-round
Flammulated Owl Otus flammeolus
http://ecos.fws.gov/ecp/species/7728
Breeding
Golden Eagle Aquila chrysaetos
http://ecos.fws.gov/ecp/species/1680
Year-round
Lark Bunting Calamospiza melanocorys Breeding
Lewis's Woodpecker Melanerpes lewis
http://ecos.fws.gov/ecp/species/9408
Breeding
Loggerhead Shrike Lanius ludovicianus
http://ecos.fws.gov/ecp/species/8833
Breeding
Long-billed Curlew Numenius americanus
http://ecos.fws.gov/ecp/species/5511
Breeding
Mccown's Longspur Calcarius mccownii
http://ecos.fws.gov/ecp/species/9292
Breeding
Mountain Plover Charadrius montanus
http://ecos.fws.gov/ecp/species/3638
Breeding
Peregrine Falcon Falco peregrinus
http://ecos.fws.gov/ecp/species/8831
Breeding
Prairie Falcon Falco mexicanus
http://ecos.fws.gov/ecp/species/4736
Year-round
Red-headed Woodpecker Melanerpes erythrocephalus Breeding
Sage Thrasher Oreoscoptes montanus
http://ecos.fws.gov/ecp/species/9433
Breeding
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What does IPaC use to generate the list of migratory bird species potentially occurring in my
specified location?
Landbirds:
Migratory birds that are displayed on the IPaC species list are based on ranges in the latest edition
of the National Geographic Guide, Birds of North America (6th Edition, 2011 by Jon L. Dunn, and
Jonathan Alderfer). Although these ranges are coarse in nature, a number of U.S. Fish and Wildlife
Service migratory bird biologists agree that these maps are some of the best range maps to date.
These ranges were clipped to a specific Bird Conservation Region (BCR) or USFWS Region/Regions,
if it was indicated in the 2008 list of Birds of Conservation Concern (BCC) that a species was a BCC
species only in a particular Region/Regions. Additional modifications have been made to some
ranges based on more local or refined range information and/or information provided by U.S. Fish
and Wildlife Service biologists with species expertise. All migratory birds that show in areas on land
in IPaC are those that appear in the 2008 Birds of Conservation Concern report.
Atlantic Seabirds:
Ranges in IPaC for birds off the Atlantic coast are derived from species distribution models
developed by the National Oceanic and Atmospheric Association (NOAA) National Centers for
Coastal Ocean Science (NCCOS) using the best available seabird survey data for the offshore
Atlantic Coastal region to date. NOAANCCOS assisted USFWS in developing seasonal species
ranges from their models for specific use in IPaC. Some of these birds are not BCC species but
were of interest for inclusion because they may occur in high abundance off the coast at different
times throughout the year, which potentially makes them more susceptible to certain types of
Short-eared Owl Asio flammeus
http://ecos.fws.gov/ecp/species/9295
Wintering
Swainson's Hawk Buteo swainsoni
http://ecos.fws.gov/ecp/species/1098
Breeding
Virginia's Warbler Vermivora virginiae
http://ecos.fws.gov/ecp/species/9441
Breeding
Western Grebe aechmophorus occidentalis
http://ecos.fws.gov/ecp/species/6743
Breeding
Williamson's Sapsucker Sphyrapicus thyroideus
http://ecos.fws.gov/ecp/species/8832
Breeding
Willow Flycatcher Empidonax traillii
http://ecos.fws.gov/ecp/species/3482
Breeding
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development and activities taking place in that area. For more refined details about the abundance
and richness of bird species within your project area off the Atlantic Coast, see the Northeast
Ocean Data Portal. The Portal also offers data and information about other types of taxa that may
be helpful in your project review.
About the NOAANCCOS models: the models were developed as part of the NOAANCCOS project:
Integrative Statistical Modeling and Predictive Mapping of Marine Bird Distributions and
Abundance on the Atlantic Outer Continental Shelf. The models resulting from this project are
being used in a number of decision-support/mapping products in order to help guide decision-
making on activities off the Atlantic Coast with the goal of reducing impacts to migratory birds. One
such product is the Northeast Ocean Data Portal, which can be used to explore details about the
relative occurrence and abundance of bird species in a particular area off the Atlantic Coast.
All migratory bird range maps within IPaC are continuously being updated as new and better
information becomes available.
Can I get additional information about the levels of occurrence in my project area of specific
birds or groups of birds listed in IPaC?
Landbirds:
The Avian Knowledge Network (AKN) provides a tool currently called the "Histogram Tool", which
draws from the data within the AKN (latest,survey, point count, citizen science datasets) to create a
view of relative abundance of species within a particular location over the course of the year. The
results of the tool depict the frequency of detection of a species in survey events, averaged
between multiple datasets within AKN in a particular week of the year. You may access the
histogram tools through the Migratory Bird Programs AKN Histogram Tools webpage.
The tool is currently available for 4 regions (California, Northeast U.S., Southeast U.S. and Midwest),
which encompasses the following 32 states: Alabama, Arkansas, California, Connecticut, Delaware,
Florida, Georgia, Illinois, Indiana, Iowa, Kentucky, Louisiana, Maine, Maryland, Massachusetts,
Michigan, Minnesota, Mississippi, Missouri, New Hampshire, New Jersey, New York, North,
Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Vermont, Virginia, West
Virginia, and Wisconsin.
In the near future, there are plans to expand this tool nationwide within the AKN, and allow the
graphs produced to appear with the list of trust resources generated by IPaC, providing you with
an additional level of detail about the level of occurrence of the species of particular concern
potentially occurring in your project area throughout the course of the year.
Atlantic Seabirds:
For additional details about the relative occurrence and abundance of both individual bird species
and groups of bird species within your project area off the Atlantic Coast, please visit the Northeast
Ocean Data Portal. The Portal also offers data and information about other taxa besides birds that
may be helpful to you in your project review. Alternately, you may download the bird model results
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files underlying the portal maps through the NOAANCCOS Integrative Statistical Modeling and
Predictive Mapping of Marine Bird Distributions and Abundance on the Atlantic Outer Continental
Shelf project webpage.
Facilities
Wildlife refuges and fish hatcheries
REFUGE AND FISH HATCHERY INFORMATION IS NOT AVAILABLE AT THIS TIME
Wetlands in the National Wetlands
Inventory
Impacts to NWI wetlands and other aquatic habitats may be subject to regulation
under Section 404 of the Clean Water Act, or other State/Federal statutes.
For more information please contact the Regulatory Program of the local
U.S. Army Corps of Engineers District.
WETLAND INFORMATION IS NOT AVAILABLE AT THIS TIME
Data limitations
The Service's objective of mapping wetlands and deepwater habitats is to produce reconnaissance
level information on the location, type and size of these resources. The maps are prepared from
the analysis of high altitude imagery. Wetlands are identified based on vegetation, visible
hydrology and geography. A margin of error is inherent in the use of imagery; thus, detailed on-
the-ground inspection of any particular site may result in revision of the wetland boundaries or
classification established through image analysis.
The accuracy of image interpretation depends on the quality of the imagery, the experience of the
image analysts, the amount and quality of the collateral data and the amount of ground truth
verification work conducted. Metadata should be consulted to determine the date of the source
imagery used and any mapping problems.
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Wetlands or other mapped features may have changed since the date of the imagery or field work.
There may be occasional differences in polygon boundaries or classifications between the
information depicted on the map and the actual conditions on site.
Data exclusions
Certain wetland habitats are excluded from the National mapping program because of the
limitations of aerial imagery as the primary data source used to detect wetlands. These habitats
include seagrasses or submerged aquatic vegetation that are found in the intertidal and subtidal
zones of estuaries and nearshore coastal waters. Some deepwater reef communities (coral or
tuberficid worm reefs) have also been excluded from the inventory. These habitats, because of
their depth, go undetected by aerial imagery.
Data precautions
Federal, state, and local regulatory agencies with jurisdiction over wetlands may define and
describe wetlands in a different manner than that used in this inventory. There is no attempt, in
either the design or products of this inventory, to define the limits of proprietary jurisdiction of any
Federal, state, or local government or to establish the geographical scope of the regulatory
programs of government agencies. Persons intending to engage in activities involving
modifications within or adjacent to wetland areas should seek the advice of appropriate federal,
state, or local agencies concerning specified agency regulatory programs and proprietary
jurisdictions that may affect such activities.
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Exhibit D – Soils Information
Hydrologic Soil Group—Larimer County Area, Colorado
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
12/6/2016
Page 1 of 4
4490330 4490340 4490350 4490360 4490370 4490380 4490390 4490400 4490410 4490420 4490430 4490440
4490330 4490340 4490350 4490360 4490370 4490380 4490390 4490400 4490410 4490420 4490430 4490440
493400 493410 493420 493430 493440 493450 493460 493470 493480
493400 493410 493420 493430 493440 493450 493460 493470 493480
40° 33' 53'' N
105° 4' 40'' W
40° 33' 53'' N
105° 4' 37'' W
40° 33' 49'' N
105° 4' 40'' W
40° 33' 49'' N
105° 4' 37'' W
N
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 13N WGS84
0 25 50 100 150
Feet
0 5 10 20 30
Meters
Map Scale: 1:563 if printed on A portrait (8.5" x 11") sheet.
Warning: 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: http://websoilsurvey.nrcs.usda.gov
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
Hydrologic Soil Group
Hydrologic Soil Group— Summary by Map Unit — Larimer County Area, Colorado (CO644)
Map unit symbol Map unit name Rating Acres in AOI Percent of AOI
4 Altvan-Satanta loams, 3
to 9 percent slopes
B 0.4 24.5%
35 Fort Collins loam, 0 to 3
percent slopes
C 1.2 75.5%
Totals for Area of Interest 1.6 100.0%
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
Hydrologic Soil Group—Larimer County Area, Colorado
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
12/6/2016
Page 3 of 4
Component Percent Cutoff: None Specified
Tie-break Rule: Higher
Hydrologic Soil Group—Larimer County Area, Colorado
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
12/6/2016
Page 4 of 4
Exhibit E – Identification of Pollutant Sources
Choice Center Third Filing – Fort Collins, CO
March 2017
OUTDOOR STORAGE OF MATERIALS LOG
IDENTIFICATION OF
POLLUTANT
DATE ONSITE
DATE
REMOVED
CONTAINMENT
METHOD
Choice Center Third Filing – Fort Collins, CO
March 2017
VEHICLE EQUIPMENT MAINTENANCE & FUELING LOG
IDENTIFICATION OF
POLLUTANT
DATE ONSITE
DATE
REMOVED
CONTAINMENT
METHOD
Choice Center Third Filing – Fort Collins, CO
March 2017
ROUTINE MAINTENANCE LOG
IDENTIFICATION OF
POLLUTANT
DATE ONSITE
DATE
REMOVED
CONTAINMENT
METHOD
Choice Center Third Filing – Fort Collins, CO
March 2017
ONSITE WASTE MANAGEMENT LOG
IDENTIFICATION OF
POLLUTANT
DATE ONSITE
DATE
REMOVED
CONTAINMENT
METHOD
Choice Center Third Filing – Fort Collins, CO
March 2017
NON-INDUSTRIAL WASTE SOURCES LOG
IDENTIFICATION OF
POLLUTANT
DATE ONSITE
DATE
REMOVED
CONTAINMENT
METHOD
Choice Center Third Filing – Fort Collins, CO
March 2017
ADDITIONAL POLLUTANT SOURCES LOG
IDENTIFICATION OF
POLLUTANT
DATE ONSITE
DATE
REMOVED
CONTAINMENT
METHOD
Exhibit F – BMP Details
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
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
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
Construction Phasing/Sequencing (CP) SM-1
November 2010 Urban Drainage and Flood Control District CP-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph CP-1. Construction phasing to avoid disturbing the
entire area at one time. Photo courtesy of WWE.
Description
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.
Construction phasing refers to
disturbing only part of a site at a time to
limit the potential for erosion from
dormant parts of a site. Grading
activities and construction are completed
and soils are effectively stabilized on one
part of a site before grading and
construction begins on another portion of the site.
Construction sequencing or scheduling refers to a specified work schedule that coordinates the timing of
land disturbing activities and the installation of erosion and sediment control practices.
Appropriate Uses
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.
Design and Installation
BMPs appropriate to the major phases of development should be identified on construction drawings. In
some cases, it will be necessary to provide several drawings showing construction-phase BMPs placed
according to stages of development (e.g., clearing and grading, utility installation, active construction,
final stabilization). Some municipalities in the Denver area set maximum sizes for disturbed area
associated with phases of a construction project. Additionally, requirements for phased construction
drawings vary among local governments within the UDFCD boundary. Some local governments require
separate erosion and sediment control drawings for initial
BMPs, interim conditions (in active construction), and final
stabilization.
Construction Scheduling
Functions
Erosion Control Moderate
Sediment Control Moderate
Site/Material Management Yes
SM-1 Construction Phasing/Sequencing (CP)
CP-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Typical construction phasing BMPs include:
Limit the amount of disturbed area at any given time on a site to the extent practical. For example, a
100-acre subdivision might be constructed in five phases of 20 acres each.
If there is carryover of stockpiled material from one phase to the next, position carryover material in a
location easily accessible for the pending phase that will not require disturbance of stabilized areas to
access the stockpile. Particularly with regard to efforts to balance cut and fill at a site, careful
planning for location of stockpiles is important.
Typical construction sequencing BMPs include:
Sequence construction activities to minimize duration of soil disturbance and exposure. For example,
when multiple utilities will occupy the same trench, schedule installation so that the trench does not
have to be closed and opened multiple times.
Schedule site stabilization activities (e.g., landscaping, seeding and mulching, installation of erosion
control blankets) as soon as feasible following grading.
Install initial erosion and sediment control practices before construction begins. Promptly install
additional BMPs for inlet protection, stabilization, etc., as construction activities are completed.
Table CP-1 provides typical sequencing of construction activities and associated BMPs.
Maintenance and Removal
When the construction schedule is altered, erosion and sediment control measures in the SWMP and
construction drawings should be appropriately adjusted to reflect actual "on the ground" conditions at the
construction site. Be aware that changes in construction schedules can have significant implications for
site stabilization, particularly with regard to establishment of vegetative cover.
Construction Phasing/Sequencing (CP) SM-1
November 2010 Urban Drainage and Flood Control District CP-3
Urban Storm Drainage Criteria Manual Volume 3
Table CP-1. Typical Phased BMP Installation for Construction Projects
Project
Phase BMPs
Pre-
disturbance,
Site Access
Install sediment controls downgradient of access point (on paved streets this may consist
of inlet protection).
Establish vehicle tracking control at entrances to paved streets. Fence as needed.
Use construction fencing to define the boundaries of the project and limit access to areas of
the site that are not to be disturbed.
Note: it may be necessary to protect inlets in the general vicinity of the site, even if not
downgradient, if there is a possibility that sediment tracked from the site could contribute
to the inlets.
Site Clearing
and Grubbing
Install perimeter controls as needed on downgradient perimeter of site (silt fence, wattles,
etc).
Limit disturbance to those areas planned for disturbance and protect undisturbed areas
within the site (construction fence, flagging, etc).
Preserve vegetative buffer at site perimeter.
Create stabilized staging area.
Locate portable toilets on flat surfaces away from drainage paths. Stake in areas
susceptible to high winds.
Construct concrete washout area and provide signage.
Establish waste disposal areas.
Install sediment basins.
Create dirt perimeter berms and/or brush barriers during grubbing and clearing.
Separate and stockpile topsoil, leave roughened and/or cover.
Protect stockpiles with perimeter control BMPs. Stockpiles should be located away from
drainage paths and should be accessed from the upgradient side so that perimeter controls
can remain in place on the downgradient side. Use erosion control blankets, temporary
seeding, and/or mulch for stockpiles that will be inactive for an extended period.
Leave disturbed area of site in a roughened condition to limit erosion. Consider temporary
revegetation for areas of the site that have been disturbed but that will be inactive for an
extended period.
Water to minimize dust but not to the point that watering creates runoff.
SM-1 Construction Phasing/Sequencing (CP)
CP-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Project
Phase BMPs
Utility And
Infrastructure
Installation
In Addition to the Above BMPs:
Close trench as soon as possible (generally at the end of the day).
Use rough-cut street control or apply road base for streets that will not be promptly paved.
Provide inlet protection as streets are paved and inlets are constructed.
Protect and repair BMPs, as necessary.
Perform street sweeping as needed.
Building
Construction
In Addition to the Above BMPs:
Implement materials management and good housekeeping practices for home building
activities.
Use perimeter controls for temporary stockpiles from foundation excavations.
For lots adjacent to streets, lot-line perimeter controls may be necessary at the back of
curb.
Final Grading
In Addition to the Above BMPs:
Remove excess or waste materials.
Remove stored materials.
Final
Stabilization
In Addition to the Above BMPs:
Seed and mulch/tackify.
Seed and install blankets on steep slopes.
Remove all temporary BMPs when site has reached final stabilization.
Protection of Existing Vegetation (PV) SM-2
November 2010 Urban Drainage and Flood Control District PV-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph PV-1. Protection of existing vegetation and a sensitive
area. Photo courtesy of CDOT.
Description
Protection of existing vegetation on a
construction site can be accomplished
through installation of a construction
fence around the area requiring protection.
In cases where upgradient areas are
disturbed, it may also be necessary to
install perimeter controls to minimize
sediment loading to sensitive areas such as
wetlands. Existing vegetation may be
designated for protection to maintain a
stable surface cover as part of construction
phasing, or vegetation may be protected in
areas designated to remain in natural
condition under post-development
conditions (e.g., wetlands, mature trees,
riparian areas, open space).
Appropriate Uses
Existing vegetation should be preserved for the maximum practical duration on a construction site
through the use of effective construction phasing. Preserving vegetation helps to minimize erosion and
can reduce revegetation costs following construction.
Protection of wetland areas is required under the Clean Water Act, unless a permit has been obtained from
the U.S. Army Corps of Engineers (USACE) allowing impacts in limited areas.
If trees are to be protected as part of post-development landscaping, care must be taken to avoid several
types of damage, some of which may not be apparent at the time of injury. Potential sources of injury
include soil compaction during grading or due to construction traffic, direct equipment-related injury such
as bark removal, branch breakage, surface grading and trenching, and soil cut and fill. In order to
minimize injuries that may lead to immediate or later death of the tree, tree protection zones should be
developed during site design, implemented at the beginning of a construction project, as well as continued
during active construction.
Design and Installation
General
Once an area has been designated as a preservation area, there should be no construction activity allowed
within a set distance of the area. Clearly mark the area with construction fencing. Do not allow
stockpiles, equipment, trailers or parking within the
protected area. Guidelines to protect various types of
existing vegetation follow.
Protection of Existing Vegetation
Functions
Erosion Control Yes
Sediment Control Moderate
Site/Material Management Yes
SM-2 Protection of Existing Vegetation (PV)
PV-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Surface Cover During Phased Construction
Install construction fencing or other perimeter controls around areas to be protected from clearing and
grading as part of construction phasing.
Maintaining surface cover on steep slopes for the maximum practical duration during construction is
recommended.
Open Space Preservation
Where natural open space areas will be preserved as part of a development, it is important to install
construction fencing around these areas to protect them from compaction. This is particularly important
when areas with soils with high infiltration rates are preserved as part of LID designs. Preserved open
space areas should not be used for staging and equipment storage.
Wetlands and Riparian Areas
Install a construction fence around the perimeter of the wetland or riparian (streamside vegetation) area to
prevent access by equipment. In areas downgradient of disturbed areas, install a perimeter control such as
silt fence, sediment control logs, or similar measure to minimize sediment loading to the wetland.
Tree Protection
1
Before beginning construction operations, establish a tree protection zone around trees to be
preserved by installing construction fences. Allow enough space from the trunk to protect the root
zone from soil compaction and mechanical damage, and the branches from mechanical damage (see
Table PV-1). If low branches will be kept, place the fence outside of the drip line. Where this is not
possible, place fencing as far away from the trunk as possible. In order to maintain a healthy tree, be
aware that about 60 percent of the tree's root zone extends beyond the drip line.
Table PV-1
Guidelines for Determining the Tree Protection Zone
(Source: Matheny and Clark, 1998; as cited in GreenCO and WWE 2008)
Distance from Trunk (ft) per inch of DBH
Species Tolerance to Damage Young Mature Over mature
Good 0.5' 0.75' 1.0'
Moderate 0.75' 1.0' 1.25'
Poor 1.0' 1.25' 1.5'
Notes: DBH = diameter at breast height (4.5 ft above grade); Young = <20% of
life expectancy; Mature = 20%-80% of life expectancy; Over mature =>80% of
life expectancy
Most tree roots grow within the top 12 to 18 inches of soil. Grade changes within the tree protection
zone should be avoided where possible because seemingly minor grade changes can either smother
1 Tree Protection guidelines adapted from GreenCO and WWE (2008). Green Industry Best Management Practices (BMPs) for
the Conservation and Protection of Water Resources in Colorado: Moving Toward Sustainability, Third Release. See
www.greenco.org for more detailed guidance on tree preservation.
Protection of Existing Vegetation (PV) SM-2
November 2010 Urban Drainage and Flood Control District PV-3
Urban Storm Drainage Criteria Manual Volume 3
roots (in fill situations) or damage roots (in cut situations). Consider small walls where needed to
avoid grade changes in the tree protection zone.
Place and maintain a layer of mulch 4 to 6-inch thick from the tree trunk to the fencing, keeping a
6-inch space between the mulch and the trunk. Mulch helps to preserve moisture and decrease soil
compaction if construction traffic is unavoidable. When planting operations are completed, the mulch
may be reused throughout planting areas.
Limit access, if needed at all, and appoint one route as the main entrance and exit to the tree
protection zone. Within the tree protection zone, do not allow any equipment to be stored, chemicals
to be dumped, or construction activities to take place except fine grading, irrigation system
installation, and planting operations. These activities should be conducted in consultation with a
landscaping professional, following Green Industry BMPs.
Be aware that soil compaction can cause extreme damage to tree health that may appear gradually
over a period of years. Soil compaction is easier to prevent than repair.
Maintenance and Removal
Repair or replace damaged or displaced fencing or other protective barriers around the vegetated area.
If damage occurs to a tree, consult an arborist for guidance on how to care for the tree. If a tree in a
designated preservation area is damaged beyond repair, remove and replace with a 2-inch diameter tree of
the same or similar species.
Construction equipment must not enter a wetland area, except as permitted by the U.S. Army Corps of
Engineers (USACE). Inadvertent placement of fill in a wetland is a 404 permit violation and will require
notification of the USACE.
If damage to vegetation occurs in a protected area, reseed the area with the same or similar species,
following the recommendations in the USDCM Revegetation chapter.
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. A construction fence helps delineate areas where
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
Functions
Erosion Control No
Sediment Control No
Site/Material Management Yes
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
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
Paving and Grinding Operations (PGO) SM-12
November 2010 Urban Drainage and Flood Control District PGO-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph PGO-1. Paving operations on a Colorado highway. Photo
courtesy of CDOT.
Description
Manage runoff from paving and grinding
operations to reduce pollutants entering
storm drainage systems and natural
drainageways.
Appropriate Uses
Use runoff management practices during
all paving and grinding operations such
as surfacing, resurfacing, and saw
cutting.
Design and Installation
There are a variety of management
strategies that can be used to manage runoff from paving and grinding operations:
Establish inlet protection for all inlets that could potentially receive runoff.
Schedule paving operations when dry weather is forecasted.
Keep spill kits onsite for equipment spills and keep drip pans onsite for stored equipment.
Install perimeter controls when asphalt material is used on embankments or shoulders near
waterways, drainages, or inlets.
Do not wash any paved surface into receiving storm drain inlets or natural drainageways. Instead,
loose material should be swept or vacuumed following paving and grinding operations.
Store materials away from drainages or waterways.
Recycle asphalt and pavement material when feasible. Material that cannot be recycled must be
disposed of in accordance with applicable regulations.
See BMP Fact Sheets for Inlet Protection, Silt Fence and other perimeter controls selected for use during
paving and grinding operations.
Maintenance and Removal
Perform maintenance and removal of inlet protection and perimeter controls in accordance with their
respective fact sheets.
Promptly respond to spills in accordance with the spill
prevention and control plan.
Paving and Grinding Operations
Functions
Erosion Control No
Sediment Control No
Site/Material Management Yes
Exhibit G – BMP Installation Log
Choice Center Third Filing – Fort Collins, CO
March 2017
BMP INSTALLATION LOG
Project: Choice Center Third Filing
Location:
1721 S. College Avenue
Fort Collins, CO 80525
BMP
Name
Date
Installed
Description of BMP Installed Responsible Party
Exhibit H – SWMP Inspection Reports
EPA SWPPP Inspection Report, Version 1.1, September 17, 2007 1
Sample Inspection Report
Instructions
This sample inspection report has been developed as a helpful tool to aid you in completing your
site inspections. This sample inspection report was created consistent with EPA’s Developing
Your Stormwater Pollution Prevention Plan. You can find both the guide and the sample
inspection report (formatted in Microsoft Word) at www.epa.gov/npdes/swpppguide
This inspection report is provided in Microsoft Word format to allow you to easily customize it
for your use and the conditions at your site. You should also customize this form to help you
meet the requirements in your construction general permit related to inspections. If your
permitting authority provides you with an inspection report, please use that form.
For more information on inspections, please see Developing Your Stormwater Pollution Plan
Chapters 6 and 8.
Using the Inspection Report
This inspection report is designed to be customized according to the BMPs and conditions at
your site. For ease of use, you should take a copy of your site plan and number all of the
stormwater BMPs and areas of your site that will be inspected. A brief description of the BMP
or area should then be listed in the site-specific section of the inspection report. For example,
specific structural BMPs such as construction site entrances, sediment ponds, or specific areas
with silt fence (e.g., silt fence along Main Street; silt fence along slope in NW corner, etc.)
should be numbered and listed. You should also number specific non-structural BMPs or areas
that will be inspected (such as trash areas, material storage areas, temporary sanitary waste areas,
etc).
You can complete the items in the “General Information” section that will remain constant, such
as the project name, NPDES tracking number, and inspector (if you only use one inspector).
Print out multiple copies of this customized inspection report to use during your inspections.
When conducting the inspection, walk the site by following your site map and numbered
BMPs/areas for inspection. Also note whether the overall site issues have been addressed
(customize this list according to the conditions at your site). Note any required corrective actions
and the date and responsible person for the correction in the Corrective Action Log.
EPA SWPPP Inspection Report, Version 1.1, September 17, 2007 2
Stormwater Construction Site Inspection Report
General Information
Project Name
NPDES Tracking No. Location
Date of Inspection Start/End Time
Inspector’s Name(s)
Inspector’s Title(s)
Inspector’s Contact Information
Inspector’s Qualifications
Describe present phase of
construction
Type of Inspection:
Regular Pre-storm event During storm event Post-storm event
Weather Information
Has there been a storm event since the last inspection? Yes No
If yes, provide:
Storm Start Date & Time: Storm Duration (hrs): Approximate Amount of Precipitation (in):
Weather at time of this inspection?
Clear Cloudy Rain Sleet Fog Snowing High Winds
Other: Temperature:
Have any discharges occurred since the last inspection? Yes No
If yes, describe:
Are there any discharges at the time of inspection? Yes No
If yes, describe:
Site-specific BMPs
Number the structural and non-structural BMPs identified in your SWPPP on your site map and list them
below (add as many BMPs as necessary). Carry a copy of the numbered site map with you during your
inspections. This list will ensure that you are inspecting all required BMPs at your site.
Describe corrective actions initiated, date completed, and note the person that completed the work in the
Corrective Action Log.
BMP BMP
Installed?
BMP
Maintenance
Required?
Corrective Action Needed and Notes
1 Yes No Yes No
2 Yes No Yes No
3 Yes No Yes No
4 Yes No Yes No
5 Yes No Yes No
6 Yes No Yes No
7 Yes No Yes No
8 Yes No Yes No
9 Yes No Yes No
10 Yes No Yes No
11 Yes No Yes No
12 Yes No Yes No
13 Yes No Yes No
EPA SWPPP Inspection Report, Version 1.1, September 17, 2007 3
BMP BMP
Installed?
BMP
Maintenance
Required?
Corrective Action Needed and Notes
14 Yes No Yes No
15 Yes No Yes No
16 Yes No Yes No
17 Yes No Yes No
18 Yes No Yes No
19 Yes No Yes No
20 Yes No Yes No
Overall Site Issues
Below are some general site issues that should be assessed during inspections. Customize this list as needed for
conditions at your site.
BMP/activity Implemented? Maintenance
Required?
Corrective Action Needed and Notes
1 Are all slopes and
disturbed areas not
actively being worked
properly stabilized?
Yes No Yes No
2 Are natural resource
areas (e.g., streams,
wetlands, mature trees,
etc.) protected with
barriers or similar
BMPs?
Yes No Yes No
3 Are perimeter controls
and sediment barriers
adequately installed
(keyed into substrate)
and maintained?
Yes No Yes No
4 Are discharge points and
receiving waters free of
any sediment deposits?
Yes No Yes No
5 Are storm drain inlets
properly protected?
Yes No Yes No
6 Is the construction exit
preventing sediment
from being tracked into
the street?
Yes No Yes No
7 Is trash/litter from work
areas collected and
placed in covered
dumpsters?
Yes No Yes No
8 Are washout facilities
(e.g., paint, stucco,
concrete) available,
clearly marked, and
maintained?
EPA SWPPP Inspection Report, Version 1.1, September 17, 2007 4
BMP/activity Implemented? Maintenance
Required?
Corrective Action Needed and Notes
9 Are vehicle and
equipment fueling,
cleaning, and
maintenance areas free
of spills, leaks, or any
other deleterious
material?
Yes No Yes No
10 Are materials that are
potential stormwater
contaminants stored
inside or under cover?
Yes No Yes No
11 Are non-stormwater
discharges (e.g., wash
water, dewatering)
properly controlled?
Yes No Yes No
12 (Other)
Yes No Yes No
Non-Compliance
Describe any incidents of non-compliance not described above:
CERTIFICATION STATEMENT
“I certify under penalty of law that this document and all attachments were prepared under my direction or
supervision in accordance with a system designed to assure that qualified personnel properly gathered and evaluated
the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons
directly responsible for gathering the information, the information submitted is, to the best of my knowledge and
belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information,
including the possibility of fine and imprisonment for knowing violations.”
Print name and title: ___________________________________________________________________________
Signature:_________________________________________________________ Date:_____________________
Exhibit I – BMP Corrective Action Log
Choice Center Third Filing – Fort Collins, CO
March 2017
BMP CORRECTIVE ACTION LOG
Project: Choice Center Third Filing
Location:
1721 S. College Avenue
Fort Collins, CO 80525
Date
Identified
Inspector Description of BMP Deficiency Corrective Action Taken
Date
Completed
Exhibit J – SWMP Amendment Log
Choice Center Third Filing – Fort Collins, CO
March 2017
SWMP AMENDMENT LOG
Project: Choice Center Third Filing
Location:
1721 S. College Avenue
Fort Collins, CO 80525
Amendment No. Date Description of Amendment
Exhibit K – Erosion and Sediment Control
Escrow/Security Calculation
Project: Disturbed Acres: 0.58
EROSION CONTROL BMPs Units
Estimated
Quantity
Unit
Price
Total
Price
LF 179 $2.50 $447.50
EA 4 $500.00 $2,000.00
EA 1 $500.00 $500.00
EA 1 $1,250.00 $1,250.00
LF 10 $3.00 $30.00
SY 69 $0.50 $34.50
Sub-Total: $4,262.00
1.5 x Sub-Total: $6,393.00
Amount of security: $6,393.00
AC 0.58 $1,090.00 $632.20
$1,090.00 Sub-Total: $632.20
1.5 x Sub-Total: $948.30
Amount to Re-seed: $948.30
Minimum escrow amount: $3,000.00
Erosion Control Escrow: $6,393.00
Erosion and Sediment Control Escrow/Security Calculation
for The City of Fort Collins
BMP Amount
Silt Fence (SF)
Vehicle Tracking Control (VTC)
Erosion Control Blanket (EB)
Reseeding Amount
Curb Rock Sock
Miniumum Escrow Amount
Choice Center Third Filing
Unit Price of Seeding per acre:
“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”
Inlet Protection (IP)
Concrete Washout (CW)
Final Escrow Amount
4/28/2017 12:58 PM K:\CHS_LDEV\168450002_CORE_FortCollins_CO_(College)\4 Bid & Construction Admin\Cost Estimates (EOPCC)\2017-0427 Erosion Control Escrow_Calculation.xls
Yes No Yes No
Survey Area Data: Version 11, Sep 23, 2016
Soil map units are labeled (as space allows) for map scales 1:50,000
or larger.
Date(s) aerial images were photographed: Apr 22, 2011—Apr 28,
2011
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
Natural Resources
Conservation Service
Web Soil Survey
National Cooperative Soil Survey
12/6/2016
Page 2 of 4
Bryce Christensen
(303) 228-2300 bryce.christensen@kimley-horn.com
Kimley-Horn and Associates, Inc.
4582 South Ulster Street
Denver CO 80237
✔
Core Fort Collins LLC