HomeMy WebLinkAboutFORT COLLINS NISSAN-KIA - PDP210017 - SUBMITTAL DOCUMENTS - ROUND 4 - EROSION CONTROL LETTER/REPORTEROSION CONTROL REPORT (SWMP)
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F ORT C OLLINS N ISSAN -K IA
Fossil Creek Subdivision
Fort Collins, CO
Prepared for:
Fort Collins Nissan-Kia
5811 S College Ave
Fort Collins, CO 80526
Date:
June 15, 2022
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CITY OF FORT COLLINS – STORMWATER UTILITY
700 WOOD STREET
FORT COLLINS, CO 80521
RE: Fort Collins Nissan-Kia
Erosion Control Report
Fort Collins, Colorado
Project Number: U21004
Dear Staff:
United Civil Design Group, LLC. is pleased to submit this Erosion Control Report (SWMP) for the Fort Collins Nissan-Kia site in
Fort Collins, Colorado. This report outlines what control measures or Best Management Practices (BMPs) will be implemented
with the proposed construction, in order to minimize potential pollutants in stormwater discharges.
We have prepared this report to accompany the Colorado Department of Public Health and Environment General Permit for
Stormwater Discharges Associated with Construction Activity.
Please note that this document is intended to be a dynamic document which will be modified and updated through the course
of site construction to accurately reflect site conditions at all times. Pollutant sources will be continuously evaluated, BMPs
selected, documented, implemented, and pollutant sources re-evaluated. As such, this version of the SWMP was prepared
to facilitate initial plan approvals and permitting, but does not necessarily reflect the final version, or the transitions
throughout the construction process. It shall be the responsibility of the Qualified Stormwater Manager and/or the permit
holder (or applicant thereof) to ensure the plan is properly maintained and followed. The Qualified Stormwater Manager for
this project is:
If you should have any questions or comments as you review this report, please feel free to contact us at your convenience.
Sincerely,
United Civil Design Group, LLC
Jacob Stein, PE Sam Eliason, PE
Professional Engineer I Principal
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O WNER :
WWW P ROPERTIES LLC
J AY W EIBEL
A DDRESS :
1005 K EN P RATT B OULEVARD
P HONE : 970.394.3442
E MAIL : JEDWARDWEIBEL @ GMAIL .COM
Q UALIFIED S TORMWATER M ANAGER :
A DDRESS :
P HONE :
E MAIL :
C ONTRACTOR :
TCC C ORPORATION
E RNIE C ROWNOVER
A DDRESS :
609 G YRFALCON , U NIT D
W INDSOR , CO 80550
P HONE : 970.460.0583
E MAIL : ECROWNOVER @ TCCORP .NET
TO FILLED OUT BY QUALIFIED
STORMWATER MANAGER/CONTRACTOR
SWMP R EVISION DATES :
E STIMATED P ROJECT D ATES :
P ROJECT S TART D ATE : O CTOBER 2022
P ROJECT C OMPLETION D ATE : J ULY 2024
CDPHE P ROJECT OR P ERMIT T RACKING N UMBER :
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TABLE OF CONTENTS
I. General Location and Description ......................................................................................................................1
A. SWMP Objective........................................................................................................................... 1
B. Location and Project Description ................................................................................................. 2
C. Description of Development ........................................................................................................ 2
D. Floodplains ................................................................................................................................... 2
II. Site Description ..................................................................................................................................................3
A. Construction Activity Description ................................................................................................ 3
B. Proposed Sequence for Major Activities ...................................................................................... 3
C. Area Estimates ............................................................................................................................. 3
D. Soil Description ............................................................................................................................ 3
E. Existing Vegetation ....................................................................................................................... 3
F. Stream Crossings .......................................................................................................................... 3
G. Potential Pollution Sources .......................................................................................................... 3
H. Non-Stormwater Components of Discharge ................................................................................ 5
I. Receiving Waters .......................................................................................................................... 5
III. CMs and BMPs for Stormwater Pollution Prevention .......................................................................................5
A. Erosion and Sediment Controls .................................................................................................... 5
B. Erosion Control Sequencing ......................................................................................................... 8
C. Spill Prevention and Response Plan ............................................................................................. 9
D. Materials Handling ....................................................................................................................... 9
IV. Other Controls ................................................................................................................................................ 10
V. Final Stabilization and Long-term Stormwater Quality ................................................................................... 10
VI. Site Inspections ............................................................................................................................................... 10
VII. Maintenance Procedures ............................................................................................................................ 12
VIII. Record Keeping ............................................................................................................................................ 12
IX. References ...................................................................................................................................................... 13
APPENDICES
APPENDIX A – Inspection Forms
APPENDIX B – Permit Map, Reference Materials & Reference Plan Sheets
APPENDIX C – Contractor Inserts (Permit, Inspection Reports, Etc.)
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I. GENERAL LOCATION AND DESCRIPTION
A. EROSION CONTROL REPORT OBJECTIVE
The objective of this Erosion Control Report (SWMP) for the Fort Collins Nissan-Kia project is to identify the Control Measures
(CMs) and Best Management Practices (BMPs) which, when implemented, will meet the requirements of the Colorado
Department of Public Health & Environment, Water Quality Control Division. According to the State of Colorado Stormwater
Management plan Guidance document, the Erosion Control Report (SWMP) goal is:
“To identify possible pollutant sources at the construction site that may contribute pollutants to stormwater, and identify
control measures that, when implemented in accordance with good engineering, hydrologic, and pollution control practices,
will reduce or eliminate any possible water quality impacts. A stormwater management plan shall be developed for each
construction site covered by the Construction Stormwater Permit. The stormwater management plan must be completed and
implemented at the time the project breaks ground, and revised as construction proceeds, to accurately reflect the conditions
and practices on site.”
Pollutant sources should be continuously evaluated, BMPs selected, documented, implemented, and pollutant sources be re-
evaluated (and the process continued). A current copy of the SWMP shall be kept onsite at all times. A person familiar with
the SWMP and on-site construction activities and clean-up procedures should be designated as the Qualified Stormwater
Manager for the site. The Qualified Stormwater Manager will be responsible for, but not limited to, inspections and inspection
reports, personnel training, regulatory agency contact, SWMP implementation and revisions, field notebooks, and record
keeping of employee activities, contacts, and notifications.
References are found in the Appendix regarding some of the requirements, restrictions, and forms related to the SWMP.
FIGURE 1: SITE VICINITY MAP S College Ave Crestridge St Smokey St
Bueno Dr Venus Ave
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B. LOCATION AND PROJECT DESCRIPTION
The Fort Collins Nissan-Kia site (referred herein as “the site”) is located within the Fossil Creek Subdivision, situated in the
northeast quarter of Section 11, Township 6 North, Range 69 West of the 6th P.M., City of Fort Collins, Larimer County,
Colorado. The property, consisting of approximately 17.0 acres, is located immediately west of South College Ave, bisected
by Crestridge Drive and currently consists of a car dealership south of Crestridge Drive and vacant land to the north. The
proposed site improvements encompass 18.5 acres including the entirety of the subject property as well as adjacent drainage
improvements reaching northwest to Fossil Creek.
The northern, undeveloped portion of the site is bounded by Crestridge St to the south, S College Ave to the east, and
undeveloped land to the north and west. Stormwater on this portion of the site largely drains the northwest via overland
flow to Fossil Creek. A portion of the site adjacently north of Crestridge St drains to the south via overland flow. All on-site
runoff drains downstream within the City of Fort Collins Fossil Creek master drainage basin.
Storm sewer infrastructure exists on-site south of Crestridge St and drains to the off-site to the east. This storm pipe exists as
an irrigation bypass system. A City of Fort Collins Floodway and an Erosion Buffer are established with Fossil Creek and Lang
Gulch. Also, existing on-site is an underground irrigation pipe owned by North Louden Ditch Company. This irrigation pipe
drains from south to north through the site, ultimately to infrastructure that drains across S College Ave to the east. The on-
site portion of this ditch lateral is planned to be relocated; however, this relocation is unrelated to the drainage design of the
site.
An existing residential subdivision and small commercial property are constructed to drain runoff to Venus Ave, conveyed
through an existing wetland area west of Venus Ave to Lang Gulch and ultimately to Fossil Creek.
C. DESCRIPTION OF DEVELOPMENT
The improved site will ultimately consist of pavement, rooftop, and landscaped areas. The site has an approximate
imperviousness of approximately 69% in the proposed condition and is divided into several smaller basins as depicted on the
Overall Drainage Plan and Detailed Drainage Plans, which can be found in Appendix B. The planned development for the Fort
Collins Nissan-Kia site consists of the following improvements:
The demolition of the existing car dealership building and pavement.
The construction of the extension of Venus Ave.
The construction of utilities and storm drainage infrastructure.
The construction of two new car dealership buildings.
The construction of new drive lanes, parking, and inventory parking lot.
The construction of landscaping.
D. FLOODPLAINS
The proposed development is not in a FEMA designated floodplain. According to the FEMA Flood Insurance Rate Map Panel
(08069C1000F), the site is zoned in an area of minimal flood hazard. The FEMA FIRMette Map is included in the appendix.
West and Northwest of the site improvements exists a “High Risk – Floodway” boundary and erosion buffer along Lang Gulch
and Fossil Creek, established by the City of Fort Collins. The Nissan-Kia property boundaries exist within the City of Fort Collins
Floodway boundary and erosion buffer; however, the limits of grading are to be outside of this boundary. The City of Fort
Collins Floodway boundary is provided on the Drainage Plan (see Appendix B) and a City of Fort Collins floodplain map is
included in Appendix B. Should construction be required within the floodway, a Floodplain Use Permit with a No-Rise
Certification will be required and all work will be required to be in compliance with Chapter 10 of the City Municipal Code. If
work within the erosion buffer is required, an erosion buffer waiver will be required.
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II. SITE DESCRIPTION
A. CONSTRUCTION ACTIVITY DESCRIPTION
Construction activity includes installation of CMs and BMPs; demolition; site grading; utility installation; building construction;
concrete and asphalt pavement installation; and landscaping.
B. PROPOSED SEQUENCE FOR MAJOR ACTIVITIES
The estimated sequence for major construction activities is as follows:
• Installation of initial erosion control items
• Demolition of existing building and pavements
• Grading of the site
• Building construction
• Construction of concrete curb, gutter and sidewalk
• Construction of asphalt and concrete pavement
• Landscaping and site stabilization
Construction is estimated to begin during October 2022 and be completed by July 2024.
C. AREA ESTIMATES
The Fort Collins Nissan-Kia site is approximately 17.0 acres in size. The limits of disturbance for this Erosion Control Report is
contained is approximately 18.5 acres including the entirety of the subject site and drainage improvements adjacent to the
site reaching to Fossil Creek. This Erosion Control Report does not include additional offsite area (for staging, material storage,
overburden stockpiles of dirt, borrow areas, etc.) other than that mentioned above.
D. SOIL DESCRIPTION
The USDA’s Web Soil Survey shows that the site consists of “Type B”, “Type C”, and “Type D” soils. The Web Soil Survey
indicates the site is comprised of Kim Loam (5.0 to 9.0% slopes), Kim Thedalund Loams (3.0 to 15.0% slopes), Midway Clay
Loam (5.0% to 25.0% slopes) and Thedalund Loam (3.0% to 9.0% slopes). The on-site soils provide moderate infiltration and
are suitable for development.
E. EXISTING VEGETATION
The northern portion of the site exists as grass/weed landscape. The weed/grass cover is good (ie., heavy or dense cover with
nearly all ground surfaces protected by vegetation). The southern portion of the site is fully developed as consists largely of
impervious hardscaping.
F. STREAM CROSSINGS
No stream crossings exist with this site.
G. POTENTIAL POLLUTION SOURCES
Potential pollutant sources for this site include the following:
1. Disturbed and stored soils;
Soil disturbance is expected on the site from demolition activities, utility trenching, foundation excavations and general
earthwork phasing. Sediment transport from disturbed soil areas may be controlled utilizing a variety of CMs and
BMPs, including but not limited to, silt fence, inlet filters, sediment control logs, surface roughening, temporary seeding
and rock socks.
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It is also expected that there will be stockpiles of dirt on the site from earth disturbing activities. For this site, stockpiles
should be located in areas where silt fence or straw wattles may be placed around the individual stockpiles to contain
the runoff (i.e. landscaped or disturbed earth areas).
2. Vehicle tracking of sediments;
It is anticipated that the contractor will access the property from College Ave. A vehicle tracking control pad will be
required at each access location on-site during construction to reduce tracking sediment onto the adjacent streets.
Construction fencing should be used to limit access to the site as required.
At the end of each workday, the Contractor shall sweep or scrape College Ave of sediment that may have accumulated
during the workday.
3. Management of contaminated soils
There are no known contaminated soils on the site. However, if the contractor encounters contaminated soils during
the construction process, the contractor should stop construction immediately, notify appropriate government
authorities, and form a plan to properly contain, remove and remediate the contamination in accordance with all City,
County, State and Federal laws and regulations and in accordance with good construction safety and practice.
4. Loading and Unloading operations
Loading and unloading will take place on the site. These activities should be, where feasible, limited to paved surfaces
within the disturbed limits of the project to minimize contact with exposed soils. BMPs such as construction fence and
silt fence in non-paved areas and rock socks in paved areas should be placed to keep sediment from exiting the
disturbed area limits.
5. Outdoor storage activities (building materials, fertilizers, chemicals, etc.);
Storage of onsite materials including building materials, fertilizers, waterline, storm sewer, and sanitary sewer will be
covered and placed on pallets to prevent direct contact with the ground and potential surface runoff.
6. Vehicle and equipment maintenance;
Vehicle and equipment maintenance should be performed offsite where feasible. For onsite vehicle and equipment
maintenance, maintenance activities should be completed in designated areas away from adjacent public streets and
within in a contained area through the use of curbs or berms. At a minimum, all vehicle and equipment maintenance
shall be performed on hard surface or gravel areas at least 50’ from any stormwater feature (i.e. inlet, storm sewer,
concentrated runoff, swale, etc.). CMs should include drip pans, drop clothes and/or other containers under vehicles.
7. Significant dust or particulate generating processes;
The Contractor shall take appropriate actions to minimize atmospheric pollution and take reasonable precautions
which may include, but not be limited to:
1. The use of water for control of dusts for construction processes such as demolition, grading, or the clearing of
land.
2. Covering, at all times when in motion, open-bodied trucks transporting materials likely to give rise to airborne
dusts.
3. Require lower speeds for vehicles entering, exiting, and driving within the project limits to minimize the amount
of dust disturbed by moving vehicles.
8. Routine maintenance activities involving fertilizers, pesticides, detergents, fuels, solvents, oils, etc;
Chemicals, fuels, lubricants, and paints stored on-site will be in water-tight containers and covered as necessary and
stored in a bermed area, a storage building, or within a vehicle to act as secondary containment.
9. On-site waste management practices (waste piles, liquid wastes, dumpsters, etc.);
1. Waste piles should be located in designated areas and shall be covered or contained through the use of curbs or
berms. Liquid wastes should be collected and stored in covered containers and disposed of properly.
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2. Solid waste materials, including disposable materials incidental to the major construction activities, will be
collected in on site dumpsters. The containers will be emptied periodically and trucked away from the site.
Dumpsters should have covers.
10. Concrete truck / equipment washing, including the concrete truck chute and associated fixtures and equipment;
A dedicated concrete washout area is necessary for this project. The contractor shall clean out equipment within the
washout area so that runoff is not allowed to leave site and enter the public streets or neighboring properties.
11. Dedicated asphalt and concrete batch plants;
There will not be dedicated asphalt or concrete batch plants on this site.
12. Non-industrial waste sources such as worker trash and portable toilets;
Worker’s trash shall be disposed of in an onsite dumpster. The site should be free of trash at the end of each working
day.
Portable toilets shall be utilized by construction personnel and serviced regularly by a commercial operator. They shall
be located a minimum of 5 feet from the curb or 50 feet from inlets. If sanitary facilities are located on a paved surface,
toilets shall be equipped with a containment pan or a secondary containment BMP. Regardless of location all portable
toilets shall be anchored per manufacturer recommendations.
H. NON-STORMWATER COMPONENTS OF DISCHARGE
In the event that groundwater is encountered during trenching or excavation operations, a temporary sediment/retention
basin should be constructed to store pumped uncontaminated dewatering flows onsite. Note that the CDPHE may also
require a separate Construction Dewatering permit. For more information on construction dewatering refer to the
Stormwater Fact Sheet which can be found at https://www.colorado.gov/cdphe.
The other non-storm water components of discharge include, but are not limited to, water line flushing, irrigation to establish
seeding, washing out concrete trucks, and watering for dust mitigation, and compaction. It is important for the contractor to
manage the runoff from these items utilizing the CMs and BMPs mentioned in this report (i.e. sediment traps, silt fence, straw
wattles, concrete washout areas, surface roughening, etc.).
I. RECEIVING WATERS
The majority of developed runoff is designed to be collected and conveyed through proposed on-site detention ponds and
water quality improvements. Stormwater will ultimately reach the Cache la Poudre River via Fossil Creek and Lane Gulch upon
discharge from the site. It is not anticipated that any runoff from the site will impact drainage patterns or infrastructure on
adjacent properties.
III. CMS AND BMPS FOR STORMWATER POLLUTION PREVENTION
A. EROSION AND SEDIMENT CONTROLS
Once construction activity begins, Control Measures (CMs) and Best Management Practices (BMPs) intended to contain
sediment onsite must be constructed, inspected and repaired as necessary. Such controls must be functional before upslope
land disturbance takes place. The CMs and BMPs will be installed as shown on the enclosed Erosion Control and Stormwater
Management Plans. They must be supplemented as on-site experience proves necessary in order to control sediment,
pollutant discharge, and ensure public safety.
Erosion Control (SWMP) drawings are located in the Appendix that include the minimum required CMs and BMPs found on
the Erosion Control Plans. The Erosion Control (SWMP) drawings should be filled in with the appropriate CMs and BMPs as
they are constructed/placed within or removed from the project site.
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The following temporary and permanent CMs and BMPs will be installed and maintained to control on-site erosion and
prevent sediment and other pollutants from traveling off-site during construction. The descriptions below provide some
information about each CM or BMP, but further information can be found in Urban Storm Drainage Criteria Manual, Volume
3 – Best Management Practices by Urban Drainage and Flood Control District.
CM or BMP Type Abbreviation Description
Construction
Fence
Temporary CF The contractor is to place construction fencing around development as
needed to limit access by construction equipment and personal vehicles
to designated areas of ingress and egress.
Regular
Meetings
Temporary Regular meetings with on-site workers including builders, suppliers,
landscape personnel, etc. should be conducted so that they are kept up
to date with site standard operating procedures. Duration and frequency
of regular meetings is to be determined by the contractor.
Staging Areas Temporary SA Provided during the construction process at least 100’ from any
stormwater conveyance. Staging areas include locations for vehicle
fueling, concrete truck washout, material storage and transfer,
equipment maintenance and cleaning, and other construction activities.
These areas will be maintained as isolated locations that allow for
contaminants to be concentrated and removed from the site as
necessary. Concrete washout areas shall be designed such that washout
water cannot leave the location, nor shall storm water runoff wash
concrete from the locations. The location of the staging area shown on
the Erosion Control drawing is approximate.
Silt Fence Temporary SF Woven synthetic permeable fabric that filters runoff. Silt fence is installed
prior to earthmoving activities and is placed downstream of areas where
runoff from construction activities is expected to occur, especially along
the site perimeter to allow sediment to settle from runoff before water
leaves the construction site. Silt fences will be installed per
manufacturer’s recommendations. Silt fence encourages sheet flow and
is not intended to be used in areas of concentrated flow. If concentrated
flow is encountered during the placement of the fence, an alternative
BMP shall be used and the SWMP should be updated to reflect this
change.
Sediment
Control Logs
(Wattles)
Temporary SCL / WD Linear roll made of natural materials such as straw, coconut fiber, of
other fibrous material trenched into the ground and held with a wooden
stake. Sediment Control Logs are designed to act as a sediment barrier to
intercept sheet flow runoff from disturbed areas. They are often used as
check dams in drainage swales or small drainage ditches.
Inlet
Protection
Temporary IP/CS Helps prevent soil and debris from the site from entering the storm drain
inlets and usually consists of a sediment filter around or upstream of the
storm drain inlet. Inlet protection allows storm water to flow into the
drain but only after excess sediment has been filtered out. Inlet
protection will be used on existing and proposed storm inlets and will be
installed at such time as construction of the storm sewer system occurs.
Inlet protection for this site will consist of: Inlet Filters, which are
permeable barriers installed around curb or area inlets that filter runoff
and remove sediment prior to entering the inlet. For this project Dandy
products (or approved equal) will be installed per manufacturer’s
recommendations.
Rock Socks Temporary RS Constructed of gravel wrapped via wire mesh or geo textile to form an
elongated cylindrical filter. Rock Socks are designed to trap sediment
during construction on roadways during events that produce stormwater
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runoff. Rock Socks are typically utilized at the perimeter of disturbed
areas to control sediment loading. Rock Socks are used in inlet protection
application when construction of roadways is complete, and they are
directly connected to a receiving storm system.
Saw Cutting
Pollution
Prevention
Temporary Saw Cutting Pollution Prevention prevents dust and slurry from asphalt
and concrete saw cutting activities from migrating into the existing storm
drain system. Slurry and cuttings shall be vacuumed during cutting and
surface operations and shall not be allowed to remain on pavement
surface overnight. Collected slurry and cuttings shall be disposed of in a
manner that does not violate groundwater or surface water standards.
Temporary
Seeding
Temporary Establishment of a temporary vegetative cover on a graded area that will
be exposed for longer than 30 days. Temporary seeding can be used on
areas requiring temporary protection that will eventually need
permanent vegetation at the completion of the construction or it can be
used for areas that will be re-disturbed after a period of inactivity.
Vehicle
Tracking
Control
Temporary VTC Stabilized stone pad located at points of ingress and egress on a
construction site and acts as a temporary BMP. The stone pad is designed
to reduce the amount of mud transported onto public roads by
construction traffic by removing mud and sediment from the vehicle’s
wheels when it drives over the gravel pad. These areas are limited to the
minimum number necessary to provide functional construction access
and installed prior grading activities. Whenever the construction
entrance exists onto a public road, the road shall be cleaned at the end of
each day. Vehicle Tracking Control should also be used at the stockpile
area exit if it is adjacent to a paved roadway. Fractured rock is preferred
over rounded rock.
Concrete
Washout Area
Temporary CWA An area to washout concrete trucks shall be established and maintained
through the completion of the concrete work.
Wind Borne
Sediment and
Dust Control
Temporary Provided during the construction process to control wind borne
sediment. During grading activities, water will be applied to the disturbed
soils for the purpose of maintaining cohesion with clay type soils and also
to meet moisture requirements for compaction of disturbed soils. Other
measures of mitigation for wind erosion may include the timely
installation of seed and mulch following the establishment of final grade.
Open areas should be kept in a roughened condition (see Surface
Roughening above).
Stockpile
Management
Temporary SM Should be used when soils or other materials are stored on the
construction site.
Grass Lined
Swales
Permanent Landscaped channels constructed generally below grade to convey runoff
or channel water to a desired location. The grass-lined areas allow for
infiltration to occur as well as including a flow path across a vegetated
surface slowing the conveyance rate of storm water runoff.
Permanent
Seeding and
Planting
Permanent Establishment of a permanent perennial vegetation such as trees, shrubs,
vines, grasses/sod, or legumes on exposed areas for final permanent
stabilization in order to provide stabilization of the soil by holding soil
particles in place. It also reduces storm water runoff velocity, maintains
sheet flow, protects the soil surface from erosion, promotes infiltration of
runoff, and improves wildlife habitat.
Preservation
of Existing
Vegetation
Permanent Occur where no construction activity is expected to occur. Preservation
of natural vegetation is generally a permanent BMP and is applicable to
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construction sites with pre-existing vegetation. Only land needed for
building activities and vehicle traffic needs is to be cleared.
Storm Sewer
Outlet
Protection
Permanent OP Structurally lined aprons or other energy dissipating devices placed at the
outlets of pipes or paved channel sections. Outlet protection devices
prevent scour at storm water outlets and minimize the potential of
downstream erosion by reducing the velocity of storm water flows. Rip-
rap and grouted rip-rap, or scour protection matting (as shown on plans)
will be used downstream of storm sewer outfalls as pipe outlet
protection. Outlet Protection is installed with the storm sewer
construction and serves as a permanent structural BMP.
B. EROSION CONTROL SEQUENCING
Erosion Control Plans, located in the Appendix, include the minimum required CMs and BMPs for the project. These plans
should be filled in and/or revised with the appropriate CMs and BMPs as they are constructed/placed within or removed from
the project site.
The Erosion Control sequencing for construction is as follows:
CM or BMP Type Abbreviation Location and Notes
PRIOR TO CONSTRUCTION
Regular Meetings Temporary N/A
Preservation of
Existing Vegetation Permanent Areas not disturbed by construction activity.
Silt Fence Temporary SF As shown on Detailed Erosion Control Plan
Staging Areas Temporary SA N/A
Vehicle Tracking
Control Temporary VTC Two (2) located at access points along College Ave
Construction Fence Temporary CF N/A
DURING CONSTRUCTION
Regular Meetings Temporary N/A
Wind Borne
Sediment and Dust
Control
Temporary
N/A
Inlet Protection Temporary IP As shown on Detailed Erosion Control Plan
Rock Socks Temporary RS As shown on Detailed Erosion Control Plan
Sediment Control
Logs (Wattles) Temporary SCL / WD As shown on Detailed Erosion Control Plan
Street Sweeping and
Cleaning Temporary College Avenue and Venus Avenue
Concrete Washout
Area Temporary CWA As shown on Detailed Erosion Control Plan
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Saw Cutting
Pollution Prevention Temporary As required
Temporary Seeding Temporary As required
Grass Lined Swales Permanent As shown on Detailed Erosion Control Plan
Permanent Seeding
and Planting Permanent As shown on Detailed Erosion Control Plan or Landscaping Plans
POST CONSTRUCTION
All Control Measures All control measures shall be maintained until final site stabilization.
C. SPILL PREVENTION AND RESPONSE PLAN
In the event of a spill or accident, the spill shall be contained with a spill kit in order to prevent the contaminants from flowing
off-site or soaking into the soil. Site personnel should be briefed in regular meetings of the presence of the spill kit and how
the kit should be used in the event of a spill. Once contained, the contaminated materials shall be properly disposed of as
approved by the Qualified Stormwater Manager and local, state, and federal jurisdictions.
For fueling areas, an appropriate absorbent (e.g. absorbent pads, oil spill kits, etc.) shall be made available and site personnel
should be briefed in regular meetings of the presence of the absorbent and how the absorbent should be used in the event
of a spill. Containers shall be available for used absorbents.
Concrete washing of concrete trucks or other equipment shall be completed in a specified concrete washout area and in a
manner and location that does not allow materials or wash water to be discharged from the site or into a storm drain system
or stream.
Once construction is completed, or as required during the course of construction, concrete waste and contaminated soil shall
be disposed of properly.
The Qualified Stormwater Manager and City Inspector should be notified immediately in the event of spills. Depending on
the nature of the spill and the material involved, the CDPHE (24-hour spill reporting line 1– 877-518-5608), downstream water
users, or other agencies may also need to be notified. Specifically, a release of any chemical, oil, petroleum product, sewage,
etc., which may enter waters of the State of Colorado (which include surface water, ground water and dry gullies or storm
sewers leading to surface water) must be reported.
D. MATERIALS HANDLING
The site development will include the appropriate construction staging and stockpiling areas to be identified by the contractor
on the Erosion Control Plans. Stormwater runoff generated from the staging areas will be routed to a temporary
sedimentation area where runoff will be contained and filtered before being discharged off site. The staging/stockpile area(s)
may be moved to a location no closer than 100’ from a stormwater conveyance and the plans should be updated with the
actual location of the stockpile/staging area(s). If relocated, the Erosion Control Report should be updated with the actual
location of the stockpile/staging area(s).
Loading and unloading will take place on the site. These activities should be, where feasible, limited to paved surfaces within
the disturbed limits of the project to minimize contact with exposed soils. BMPs such as construction fence and silt fence in
non-paved areas and rock socks in paved areas should be placed to keep sediment from exiting the disturbed area limits.
Chemicals, fuels, lubricants, and paints typical with building construction stored on-site will be in water-tight containers and
covered as necessary and stored in a bermed area, a storage building, or within a vehicle to act as secondary containment.
E ROSION C ONTROL R EPORT
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10 U21004 - EC Report.docx
Storage of onsite materials including building materials, fertilizers, waterline, sanitary sewer, and storm sewer will be covered
and placed on pallets to prevent direct contact with the ground and potential surface runoff.
Other hazardous waste disposal (that is not typical to residential or commercial building construction) is not included within
this SWMP. Concrete and asphalt batch plants are not anticipated on this site and thus are not included in this SWMP.
IV. OTHER CONTROLS
The following includes other measures to control pollutants:
Solid waste materials, including disposable materials incidental to the major construction activities, will be collected
in containers. The containers will be emptied periodically and trucked away from the site. Dumpsters should have
covers.
Water used to establish and maintain grass, for dust control, and for other purposes during the construction phase
must originate from a public water supply or private well approved by the Colorado Department of Public Health
and Environment unless otherwise approved.
Sanitary facilities shall be provided at the site throughout construction activities. They shall be utilized by
construction personnel and serviced regularly by a commercial operator. They shall be located a minimum of 5 feet
from the curb or 50 feet from inlets and must be anchored. If sanitary facilities are located on a paved surface, a
secondary containment CM will need to be constructed.
Access from paved roads should be limited.
CMs such as tarps and drip pans should be used for painting, stucco, dry-wall etc. operations.
Super-chlorinated water used for flushing water distribution systems will be de-chlorinated prior to discharging
from the site by aeration, retention, dissipation, or chemical treatment.
V. FINAL STABILIZATION AND LONG-TERM STORMWATER QUALITY
Final stabilization is reached when all soil disturbing activities at the site have been completed and vegetative cover has been
established with a density of at least 70 percent of pre-disturbance levels or when equivalent permanent erosion reduction
methods have been utilized. Upon final stabilization, temporary CMs and BMPs may be removed, unless they are required to
remain in place for future phasing.
Water quality will be provided through the use of several methods around the site including bioretention, underground water
quality, and extended detention. Two bioretention ponds are proposed to convey and treat stormwater prior to release to
downstream proposed detention facilities and ultimately Fossil Creek. An underground water quality facility is proposed near
the north of the site and is designed to divert runoff during the water quality events and treat flows through infiltration prior
to being collected within an underdrain system. Water quality is included via extended detention proposed Pond A1, which
is sufficiently sized to provide water quality capture volume in addition to the necessary detention volume.
VI. SITE INSPECTIONS
Regular inspections, testing of equipment, timely maintenance of the equipment, and complete records of the maintenance
and inspections of the equipment shall be conducted by the Qualified Stormwater Manager and are essential to the
effectiveness of the Erosion Control Report. The maintenance and inspection records will be kept on site and made available
to any local, state, or federal officials upon request.
Inspections must include the observation of the construction site perimeter, runoff discharge points, disturbed areas,
designated haul routes, material and waste storage areas exposed to precipitation, locations where vehicles exit the site,
staging areas (including concrete washout areas and fueling areas), erosion and sediment control measures identified in this
SWMP, and any other structural CMs or BMPs that may require maintenance. Per the CDPHE, the inspection must include
the following requirements:
E ROSION C ONTROL R EPORT
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11 U21004 - EC Report.docx
Visually verify whether all implemented control measures are in effective operational condition and are working
as designed in their specifications to minimize pollutant discharges.
Determine if there are new potential sources of pollutants.
Assess the adequacy of control measures at the site to identify areas requiring new or modified control
measures to minimize pollutant discharges.
Identify all areas of non–compliance with the Construction Stormwater Permit requirements and, if necessary,
implement corrective action as described below.
Routine inspections must be conducted in accordance with one of the following schedules:
1. At least one inspection every 7 calendar days or
2. At least one inspection every 14 calendar days and within 24 hours after the end of any precipitation or
snowmelt event that causes surface erosion.
o Note that post-storm inspections may be used to fulfill the 14-day routine inspection requirement.
Inspections may be conducted on either the 7-day or 14-day schedule and the inspection schedule must be noted on
the inspection reports.
When site conditions make the required schedule impractical, the permittee may petition the City of Fort Collins or
CDPHE to grant an alternate inspection schedule. The alternative inspection schedule may not be implemented prior to
written approval by the City and/or CDPHE and incorporation into the plan.
Site inspections must be conducted at least once every 7 calendar days for sites that discharge to a water body
designated as an Outstanding Water by the Water Quality Control Commission.
The CDPHE does allow for reduced inspection frequencies under the following conditions:
Post-Storm Inspections at Temporarily Idle Sites
o For permittees choosing to combine 14-day inspections and post-storm-event inspections, if no construction
activities will occur following a storm event, post-storm event inspections must be conducted prior to re-
commencing construction activities, but no later than 72 hours following the storm event. The delay of any
post-storm event inspection must be documented in the inspection record. Routine inspections must still be
conducted at least every 14 calendar days.
Inspections at Completed Sites/Areas
o When the site, or portions of a site are awaiting establishment of a vegetative ground cover and final
stabilization, the permittee must conduct a site inspection at least once every 30 days.
o Post-storm event inspections are not required.
o This reduced inspection schedule is allowed if all of the following criteria are met:
All construction activities resulting in ground disturbance are complete;
All activities required for final stabilization, in accordance with the plan, have been completed, with the
exception of the application of seed that has not occurred due to seasonal conditions or the necessity for
additional seed application to augment previous efforts; and
The plan has been amended to locate those areas to be inspected on a reduced schedule.
Winter Conditions Inspections Exclusion
o Inspections are not required for sites that meet all of the following conditions:
Construction activities are temporarily halted,
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12 U21004 - EC Report.docx
Snow cover exists over the entire site for an extended period, and
Melting conditions posing a risk of surface erosion do not exist.
o When this inspection exclusion is implemented, the following information must be documented in the
inspection reports:
Dates when snow cover existed;
Date when construction activities ceased; and
Date melting conditions began.
VII. MAINTENANCE PROCEDURES
Upon completion of each phase of construction, appropriate measures shall be taken to inspect and maintain existing erosion
control features, as described herein or per manufacturers specifications (whichever is more stringent) and install new
erosion control elements associated with each phase of construction.
Preventative maintenance also involves the regular inspection and testing of equipment, timely maintenance of the
equipment, and complete records of the maintenance and inspections of the equipment. The maintenance and inspection
records will be kept on site and made available to local, state, or federal officials upon request.
The following includes some maintenance procedures:
Erosion and sediment control measures determined, upon inspection, to be in need of repair shall be maintained before
the next anticipated storm event or as necessary to maintain continued effectiveness of erosion and sediment control
measures. If it is impractical to maintain erosion and sediment control measures before the next storm event,
maintenance should be accomplished as soon as practical.
Locations where vehicles enter or exit the site shall be inspected for evidence of sediment being tracked off-site by
construction traffic. Such sediment shall be removed before it can be conveyed to the receiving storm drains or creeks.
Seeded areas will be checked to see that grass coverage is maintained. Areas will be watered, fertilized and reseeded as
needed.
It is the responsibility of the Operator to maintain effective pollutant discharge controls. Actual physical site conditions
or contractor practices could make it necessary to install more control than are shown on the Erosion Control Plan. For
example, localized concentrations of surface runoff or unusually steep areas could require additional erosion control
devices. Assessing the need for and implementing additional controls will be a continuing aspect of the SWMP until final
stabilization. This plan intends to control water-borne and liquid pollutant discharges by some combination of
interception, filtration, and containment. Parties implementing this plan must remain alert to the need to periodically
refine and update the plan in order to accomplish the intended goals.
Sediment that has escaped the construction site must be removed at a frequency sufficient to minimize off-site impacts.
VIII. RECORD KEEPING
Records should include complete inspection reports for each inspection, maintenance, and/or repair. A record-keeping
system is recommended in managing inspection and maintenance reports and should include all maintenance records, spill
response, weather conditions, training, correspondence, etc. At a minimum, the following record keeping for the project
should include:
1. The permittee must retain a hardcopy of the SWMP at the construction site throughout the life of the project.
2. The SWMP should be considered a "living document" that will be continuously reviewed and modified, including
but not limited to: additions, deletions, and changing locations of control measures. These changes will be marked
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13 U21004 - EC Report.docx
in the plans, dated and initialed at time of occurrence.
3. All inspection and maintenance activities or other repairs will be documented and the records kept for review upon
request. A blank copy of the CDPHE Stormwater Inspection Report Template is provided in Appendix A.
4. Records of spills, leaks or overflows that result in the discharge of pollutants must be documented and maintained.
Information that should be recorded for all occurrences include the time and date, weather conditions, reasons for
spill, etc. A release of any chemical, oil, petroleum product, sewage, etc., which may enter state waters must be
reported immediately to the City inspector and the State of Colorado Spill Hotline at 1-877-518-5608.
5. Incidents of noncompliance, such as uncontrolled releases of pollutants including mud, muddy water or
measurable quantities of sediment found off-site will be noted, along with a brief explanation as to measures taken
to prevent future violations and measures taken to clean up sediment that has left the site.
IX. REFERENCES
1. Fort Collins Nissan-Kia Final Drainage Report, United Civil Design Group, LLC., June 2022.
2. Larimer County Urban Area Street Standards, Larimer County, Colorado, Repealed and Reenacted, Effective August 1,
2021.
3. Natural Resources Conservation Service Web Soil Survey at www.websoilsurvey.nrcs.usda.gov/app.
4. Urban Storm Drainage Criteria Manual, Urban Drainage and Flood Control District, Wright Water Engineers, Inc., Denver,
Colorado 2002.
5. Fort Collins Stormwater Criteria Manual, City of Fort Collins, adopted in 2011, revised in December 2018.
6. State of Colorado, Stormwater Discharges Associated with Construction Activity, Stormwater Management Plan
Preparation Guides, www.colorado.gov.
A PPENDIX A
I NSPECTION F ORMS
31 |
Appendix D: Stormwater Inspection Report Template
Facility Name Permittee
Date of Inspection Weather Conditions
Permit Certification # Disturbed Acreage
Phase of Construction Inspector Title
Inspector Name
Is the above inspector a qualified stormwater manager?
(permittee is responsible for ensuring that the inspector is a qualified stormwater manager)
YES NO
INSPECTION FREQUENCY
Check the box that describes the minimum inspection frequency utilized when conducting each inspection
At least one inspection every 7 calendar days
At least one inspection every 14 calendar days, with post-storm event inspections conducted within
24 hours after the end of any precipitation or snowmelt event that causes surface erosions
This is this a post-storm event inspection. Event Date: _____________________
Reduced inspection frequency - Include site conditions that warrant reduced inspection frequency
Post-storm inspections at temporarily idle sites
Inspections at completed sites/area
Winter conditions exclusion
Have there been any deviations from the minimum inspection schedule?
If yes, describe below.
YES NO
INSPECTION REQUIREMENTS*
i. Visually verify all implemented control measures are in effective operational condition and are working as
designed in the specifications
ii. Determine if there are new potential sources of pollutants
iii. Assess the adequacy of control measures at the site to identify areas requiring new or modified control measures
to minimize pollutant discharges
iv. Identify all areas of non-compliance with the permit requirements, and if necessary, implement corrective action
*Use the attached Control Measures Requiring Routine Maintenance and Inadequate Control Measures
Requiring Corrective Action forms to document results of this assessment that trigger either maintenance or
corrective actions
AREAS TO BE INSPECTED
Is there evidence of, or the potential for, pollutants leaving the construction site boundaries, entering the stormwater
drainage system or discharging to state waters at the following locations?
NO YES
If "YES” describe discharge or potential for discharge below.
Document related maintenance, inadequate control measures
and corrective actions Inadequate Control Measures
Requiring Corrective Action form
Construction site perimeter
All disturbed areas
Designated haul routes
Material and waste storage areas
exposed to precipitation
Locations where stormwater has the
potential to discharge offsite
Locations where vehicles exit the site
Other: ____________________
CONTROL MEASURES REQUIRING ROUTINE MAINTENANCE
Definition: Any control measure that is still operating in accordance with its design and the requirements of the permit, but requires maintenance to prevent a
breach of the control measure. These items are not subject to the corrective action requirements as specified in Part I.B.1.c of the permit.
Are there control measures requiring maintenance? NO YES
If “YES” document below
Date
Observed Location Control Measure Maintenance Required Date
Completed
INADEQUATE CONTROL MEASURES REQUIRING CORRECTIVE ACTION
Definition: Any control measure that is not designed or implemented in accordance with the requirements of the permit and/or any control measure that is not
implemented to operate in accordance with its design. This includes control measures that have not been implemented for pollutant sources. If it is infeasible
to install or repair the control measure immediately after discovering the deficiency the reason must be documented and a schedule included to return the
control measure to effective operating condition as possible.
Are there inadequate control measures requiring corrective action?
NO YES
If “YES” document
below
Are there additional control measures needed that were not in place at the time of
inspection?
NO YES
If “YES” document
below
Date
Discovered Location Description of Inadequate
Control Measure Description of Corrective Action
Was deficiency corrected when
discovered? YES/NO
if “NO” provide reason and schedule to correct
Date
Corrected
REPORTING REQUIREMENTS
The permittee shall report the following circumstances orally within twenty-four (24) hours from the time the permittee becomes aware of the circumstances,
and shall mail to the division a written report containing the information requested within five (5) working days after becoming aware of the following
circumstances. The division may waive the written report required if the oral report has been received within 24 hours.
All Noncompliance Requiring 24-Hour Notification per Part II.L.6 of the Permit
a. Endangerment to Health or the Environment
Circumstances leading to any noncompliance which may endanger health or the environment regardless of the cause of the incident (See Part II.L.6.a
of the Permit)
This category would primarily result from the discharge of pollutants in violation of the permit
b. Numeric Effluent Limit Violations
o Circumstances leading to any unanticipated bypass which exceeds any effluent limitations (See Part II.L.6.b of the Permit)
o Circumstances leading to any upset which causes an exceedance of any effluent limitation (See Part II.L.6.c of the Permit)
o Daily maximum violations (See Part II.L.6.d of the Permit)
Numeric effluent limits are very uncommon in certifications under the COR400000 general permit. This category of noncompliance only applies if
numeric effluent limits are included in a permit certification.
Has there been an incident of noncompliance requiring 24-hour notification?
NO YES
If “YES” document
below
Date and
Time of
Incident
Location Description of
Noncompliance Description of Corrective Action
Date and Time of
24 Hour Oral
Notification
Date of 5 Day Written
Notification *
*Attach copy of 5 day written notification to report. Indicate if written notification was waived, including the name of the division personnel who granted waiver.
After adequate corrective action(s) and maintenance have been taken, or where a
report does not identify any incidents requiring corrective action or maintenance, the
individual(s) designated as the Qualified Stormwater Manager, shall sign and certify the
below statement:
“I verify that, to the best of my knowledge and belief, all corrective action and
maintenance items identified during the inspection are complete, and the site is
currently in compliance with the permit.”
_________________________________ ____________________________________
Name of Qualified Stormwater Manager Title of Qualified Stormwater Manager
_________________________________ _____________________________________
Signature of Qualified Stormwater Manager Date
Notes/Comments
A PPENDIX B
P ERMIT M AP & R EFERENCE P LAN S HEETS
LIMITS OF OVERALL
PROJECT DISTURBANCE
(18.5 ACRES)
SKYWAY DRIVE COLLEGE AVESATURN DRIVE
TRILBY ROADBNSF RAILWAYFOSSI
L
CREEK
PARKWAY
0'1000'2000'
SCALE: 1" = 1000'
500'C:\UNITED CIVIL DROPBOX\PROJECTS\U21004 - NISSAN DEALERSHIP\CADD\ET\CDPHE DISCHARGE MAP.DWGCDPHE DISCHARGE MAPPATH:DRAWING NAME:SHEET SIZE: 8.5 x 11FORT COLLINS NISSAN
CDPHE DISCHARGE MAP
JOB NUMBER:U21004 NOTE:THIS EXHIBIT WAS PREPARED FOR INFORMATION ONLY AND THE ENGINEER PREPARING THESE PLANS WILL NOT BE RESPONSIBLE FOR UNAUTHORIZED USE OF THEM.DATE:June 8, 2022 PREPARED FOR:TCC CORPORATION SHEET OF1 1NORTH19 OLD TOWN SQUARE #238 | FORT COLLINS, CO 80524 | (970) 530-4044 | www.unitedcivil.com
UNITED CIVIL
Design Group
4.2:15.8:1 3.9:14.0:14.0:14.0:14.0:1NISSAN DEALERSHIPBUILDINGFFE = 5020.00COLLEGE AVE (HWY 287)FOSSIL CREEK
TRA
IL
FOSSIL CREEKFLOODPLAIN/FLOODWAYEROSION BUFFER LIMITSEXISTING WETLANDSV
E
NU
S
A
V
E
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U
ETRACT CTRACT DLOT 1BLOCK 1TURF REINFORCEMENT MAT ORSCOURSTOP TO BE PLACED WITHIN CHANNELUNDERGROUNDDETENTION AREA(SEE E.C. NOTE 12)STRUCTURAL RETAINING WALLSUNDERGROUND WQAREA (SEE E.C. NOTE 12)1" = 40'1" = N/A6/14/2022 9:03:23 AMC:\UNITED CIVIL DROPBOX\PROJECTS\U21004 - NISSAN DEALERSHIP\CADD\CP\C4.3X - DETAILED EROSION CONTROL PLANS.DWGC4.3X - DETAILED EROSION CONTROL PLANS####C4.3069DETAILED EROSION CONTROL PLAN - NORTH
PREPARED FOR:JOB NUMBERSHEET NUMBERSHEETSOFDATE SUBMITTED:VERTICAL:HORIZONTAL:SCALEPRELIMINARYPLANSNOT FOR CONSTRUCTIONPROJ. MGR:DRAWING NAME:PATH:DESIGNER:DATE:TIME:
The engineer preparing these plans will not be responsible for, or liable for, unauthorized
changes to or uses of these plans. All changes to the plans must be in writing and must
be approved by the preparer of these plans.
NO.BY DATE
CAUTIONREVISIONS:CIVIL ENGINEERING & CONSULTINGUNITED CIVILDesign Group19 OLD TOWN SQUARE #238FORT COLLINS, CO 80524(970) 530-4044www.unitedcivil.comTCC CORPORATION
FORT COLLINS NISSAN-KIA
6/15/2022U2100427SWALE FLOWLINEINLETPROTECTIONROCK SOCKSEDIMENTCONTROL LOGRIPRAPCONCRETEWASHOUT AREASILT FENCEPROPOSED MAJOR CONTOURPROPOSED MINOR CONTOURLEGEND1.EXISTING UNDERGROUND AND OVERHEAD PUBLIC AND PRIVATEUTILITIES AS SHOWN ARE INDICATED ACCORDING TO THE BESTINFORMATION AVAILABLE TO THE ENGINEER. THE ENGINEER DOESNOT GUARANTEE THE ACCURACY OF SUCH INFORMATION.EXISTING UTILITY MAINS AND SERVICES MAY NOT BE STRAIGHTLINES OR AS INDICATED ON THESE DRAWINGS. THE CONTRACTORSHALL BE RESPONSIBLE TO CALL ALL UTILITY COMPANIES (PUBLICAND PRIVATE) PRIOR TO ANY CONSTRUCTION TO VERIFY EXACTUTILITY LOCATION.2.THE CONTRACTOR SHALL PROTECT ALL EXISTING FEATURES THATARE NOT TO BE REMOVED ADJACENT TO THE CONSTRUCTION AREAINCLUDING, BUT NOT LIMITED TO, PAVEMENT, PRIVATE FENCES,ABOVE GROUND OR UNDERGROUND UTILITIES, STRUCTURES, ANDUNDERGROUND FOUNDATIONS. THE CONTRACTOR SHALL BERESPONSIBLE FOR ANY DAMAGE THAT SHOULD OCCUR TO ANYON-SITE, OFF-SITE, PUBLIC OR PRIVATE FACILITY OR FEATURE AS ARESULT OF THE CONSTRUCTION PROCESS FOR THIS PROJECT.3.THE CONTRACTOR SHALL COORDINATE ALL CONSTRUCTION ITEMSIMPACTING ADJACENT PROPERTIES WITH THE PROPERTY OWNERSPRIOR TO BEGINNING ANY CONSTRUCTION ACTIVITIES.4.REFER TO SHEETS C4.10-C4.11 FOR DETAILED GRADING PLANS.NOTESEXISTING MAJOR CONTOUREXISTING MINOR CONTOUREXISTING PROPERTY BOUNDARYRIGHT OF WAYEROSION CONTROL NOTESVEHICLETRACKINGCONTROLSLOPE PROTECTION(SEE EROSIONCONTROL NOTE 5)COLLEGE AVE (HWY 287)VENUS AVENUEMILKY WAY DRIVENKEYMAP1.TOTAL DISTURBED AREA = 808,500 SF (18.56 ACRES).2.THE SITE WILL BE LANDSCAPED TO FINAL STABILIZATION. SEEFINAL LANDSCAPE PLAN FOR DETAILS.3.REFER TO SHEET C0.02 FOR STANDARD EROSION AND SEDIMENTCONTROL CONSTRUCTION PLAN NOTES.4.EROSION CONTROL PRACTICES, SITE PROTECTION, ANDREVEGETATION METHODS SHALL FOLLOW CITY REGULATIONS.5.CONTRACTOR TO TERRACE SLOPES USING A "TRACKED" VEHICLE,RUN PERPENDICULAR TO SLOPE TO INHIBIT RILL/GULLEY EROSION.CONTRACTOR MAY USE OTHER WINDROW-TYPE METHODS ASAPPROVED BY ENGINEER. TYPICAL ALL SLOPES, REPEAT ASNECESSARY UNTIL LANDSCAPING IS INSTALLED.6.PERMANENT SITE STABILIZATION SHALL BE DONE IN ACCORDANCEWITH THE APPROVED LANDSCAPE PLAN FOR THIS DEVELOPMENT.7.ANY AREAS USED FOR STOCKPILING AND/OR STAGING SHOULDALSO HAVE SEDIMENT AND EROSION CONTROL MEASURES ASNECESSARY. THESE AREAS SHOULD BE LOCATED AT LEAST 100'AWAY FROM DRAINAGE WAYS. THE ITEMS MAY INCLUDE BUT ARENOT LIMITED TO VEHICLE TRACKING CONTROL, SILT FENCE,CONSTRUCTION FENCE, CONCRETE WASHOUT, AND SEDIMENTTRAP.8.SOIL AMENDMENTS SHALL BE INCORPORATED IN ALL LANDSCAPEAREAS TO A DEPTH OF 6" AT A RATE OF 3 CUBIC YARDS PER 1000SQUARE FEET OF AREA -OR- 4" OF LOOSE TOPSOIL IMPORTEDONTO THE SITE OVER 4" OF LOOSENED SUBGRADE SOILS. REFERTO CITY OF FORT COLLINS CODE SECTIONS 12-130 THROUGH12-132.9.TEMPORARY SEEDING SHALL BE UTILIZED IN THE EVENT THAT AGRADED AREA IS EXPOSED LONGER THAN 30 DAYS. THE SITESHALL BE SEEDED WITH THE APPROPRIATE SEED MIX ANDINSTALLATION METHOD AS SPECIFIED ON THE APPROVEDLANDSACPE PLANS.10.A COMMERCIAL FERTILIZER WITH THE FOLLOWING SPECS SHALLBE USED:11.DOWNSPOUTS DESIGNED TO DISCHARGE RUNOFF AT GROUNDSURFACE ARE TO BE PROVIDED WITH A SPLASH GUARD.12.ALL LID AND INFILTRATION PRACTICES SHALL BE BUILT AS PART OFTHE FINAL CONSTRUCTION SEQUENCE TO MINIMIZE THEPOTENTIAL FOR THESE TO BE CLOGGED WITH SEDIMENT DUE TOCONSTRUCTION ACTIVITIES ON THE SITE.INGREDIENT% AVAILABLEBY WEIGHTAPPLICATIONRATE INLBS/ACRENORTH040'80'SCALE: 1" = 40'20'PROJECT:FORT COLLINS NISSAN-KIABEST MANAGEMENT PRACTICE ITEM:PRESERVE EXISTING VEGETATIONSILT FENCEVEHICLE TRACKING CONTROLSTAGING AREAS (if applicable)CONSTRUCTION FENCE (if applicable)ROCK SOCKSCONCRETE WASHOUT AREA(if applicable)TEMPORARY SEEDINGINLET PROTECTION (EXIST. & PROP.)1.COLUMNS SHOWN BELOW FOR TEMPORARY EROSION CONTROL ITEMS REPRESENT PHASE OFCONSTRUCTION INCREMENTS, NOT SPECIFIC TIME DURATIONS.2.CONTRACTOR IS RESPONSIBLE FOR REGULAR MAINTENANCE OF ALL BMPs.MOBILIZATIONDEMOLITIONUTILITYINSTALLATIONBUILDINGCONSTRUCTIONSITE GRADING& PAVINGFINAL LANDSCAPING& STABILIZATIONPHASE OF CONSTRUCTIONEROSION CONTROL SEQUENCING
6.1:1 4.1:111.9%4.0:14.0:14.2:15.8:1
2.4%5.1:1NISSAN DEALERSHIPBUILDINGFFE = 5020.00KIA DEALERSHIPBUILDINGFFE = 5022.255011.000BIORETENTION POND A2DETENTION POND A1VENUS AVENUECOLLEGE AVE (HWY 287)LOT 2BLOCK 1TRACT ATRACT BLOT 1BLOCK 2LOT 1BLOCK 1PROPOSED WETLAND CHANNEL(SEE NOTE 12)4.0:16.9:14.2:1CONCRETE FOREBAYPROPOSED WALLSEDIMENT SHALL BE PREVENTED FROMENTERING CONSTRUCTED WETLANDS BYUSE OF SILT FENCE OR STRAW WATTLESUNTIL LANDSCAPING IS ESTABLISHED(ALSO REFER TO NOTE 12)BIORETENTIONPOND A3DETENTIONPOND A15.8:1CONCRETE FOREBAYLEVLE SPREADERCONCRETE FOREBAYCONCRETE FOREBAY1" = 40'1" = N/A6/14/2022 9:03:31 AMC:\UNITED CIVIL DROPBOX\PROJECTS\U21004 - NISSAN DEALERSHIP\CADD\CP\C4.3X - DETAILED EROSION CONTROL PLANS.DWGC4.3X - DETAILED EROSION CONTROL PLANS####C4.3169DETAILED EROSION CONTROL PLAN - SOUTH
PREPARED FOR:JOB NUMBERSHEET NUMBERSHEETSOFDATE SUBMITTED:VERTICAL:HORIZONTAL:SCALEPRELIMINARYPLANSNOT FOR CONSTRUCTIONPROJ. MGR:DRAWING NAME:PATH:DESIGNER:DATE:TIME:
The engineer preparing these plans will not be responsible for, or liable for, unauthorized
changes to or uses of these plans. All changes to the plans must be in writing and must
be approved by the preparer of these plans.
NO.BY DATE
CAUTIONREVISIONS:CIVIL ENGINEERING & CONSULTINGUNITED CIVILDesign Group19 OLD TOWN SQUARE #238FORT COLLINS, CO 80524(970) 530-4044www.unitedcivil.comTCC CORPORATION
FORT COLLINS NISSAN-KIA
6/15/2022U2100428SWALE FLOWLINEINLETPROTECTIONROCK SOCKSEDIMENTCONTROL LOGRIPRAPCONCRETEWASHOUT AREASILT FENCEPROPOSED MAJOR CONTOURPROPOSED MINOR CONTOURLEGEND1.EXISTING UNDERGROUND AND OVERHEAD PUBLIC AND PRIVATEUTILITIES AS SHOWN ARE INDICATED ACCORDING TO THE BESTINFORMATION AVAILABLE TO THE ENGINEER. THE ENGINEER DOESNOT GUARANTEE THE ACCURACY OF SUCH INFORMATION.EXISTING UTILITY MAINS AND SERVICES MAY NOT BE STRAIGHTLINES OR AS INDICATED ON THESE DRAWINGS. THE CONTRACTORSHALL BE RESPONSIBLE TO CALL ALL UTILITY COMPANIES (PUBLICAND PRIVATE) PRIOR TO ANY CONSTRUCTION TO VERIFY EXACTUTILITY LOCATION.2.THE CONTRACTOR SHALL PROTECT ALL EXISTING FEATURES THATARE NOT TO BE REMOVED ADJACENT TO THE CONSTRUCTION AREAINCLUDING, BUT NOT LIMITED TO, PAVEMENT, PRIVATE FENCES,ABOVE GROUND OR UNDERGROUND UTILITIES, STRUCTURES, ANDUNDERGROUND FOUNDATIONS. THE CONTRACTOR SHALL BERESPONSIBLE FOR ANY DAMAGE THAT SHOULD OCCUR TO ANYON-SITE, OFF-SITE, PUBLIC OR PRIVATE FACILITY OR FEATURE AS ARESULT OF THE CONSTRUCTION PROCESS FOR THIS PROJECT.3.THE CONTRACTOR SHALL COORDINATE ALL CONSTRUCTION ITEMSIMPACTING ADJACENT PROPERTIES WITH THE PROPERTY OWNERSPRIOR TO BEGINNING ANY CONSTRUCTION ACTIVITIES.4.REFER TO SHEETS C4.10-C4.11 FOR DETAILED GRADING PLANS.NOTESEXISTING MAJOR CONTOUREXISTING MINOR CONTOUREXISTING PROPERTY BOUNDARYRIGHT OF WAYEROSION CONTROL NOTESVEHICLETRACKINGCONTROLSLOPE PROTECTION(SEE EROSIONCONTROL NOTE 5)COLLEGE AVE (HWY 287)VENUS AVENUEMILKY WAY DRIVENKEYMAP1.TOTAL DISTURBED AREA = 808,500 SF (18.56 ACRES).2.THE SITE WILL BE LANDSCAPED TO FINAL STABILIZATION. SEEFINAL LANDSCAPE PLAN FOR DETAILS.3.REFER TO SHEET C0.02 FOR STANDARD EROSION AND SEDIMENTCONTROL CONSTRUCTION PLAN NOTES.4.EROSION CONTROL PRACTICES, SITE PROTECTION, ANDREVEGETATION METHODS SHALL FOLLOW CITY REGULATIONS.5.CONTRACTOR TO TERRACE SLOPES USING A "TRACKED" VEHICLE,RUN PERPENDICULAR TO SLOPE TO INHIBIT RILL/GULLEY EROSION.CONTRACTOR MAY USE OTHER WINDROW-TYPE METHODS ASAPPROVED BY ENGINEER. TYPICAL ALL SLOPES, REPEAT ASNECESSARY UNTIL LANDSCAPING IS INSTALLED.6.PERMANENT SITE STABILIZATION SHALL BE DONE IN ACCORDANCEWITH THE APPROVED LANDSCAPE PLAN FOR THIS DEVELOPMENT.7.ANY AREAS USED FOR STOCKPILING AND/OR STAGING SHOULDALSO HAVE SEDIMENT AND EROSION CONTROL MEASURES ASNECESSARY. THESE AREAS SHOULD BE LOCATED AT LEAST 100'AWAY FROM DRAINAGE WAYS. THE ITEMS MAY INCLUDE BUT ARENOT LIMITED TO VEHICLE TRACKING CONTROL, SILT FENCE,CONSTRUCTION FENCE, CONCRETE WASHOUT, AND SEDIMENTTRAP.8.SOIL AMENDMENTS SHALL BE INCORPORATED IN ALL LANDSCAPEAREAS TO A DEPTH OF 6" AT A RATE OF 3 CUBIC YARDS PER 1000SQUARE FEET OF AREA -OR- 4" OF LOOSE TOPSOIL IMPORTEDONTO THE SITE OVER 4" OF LOOSENED SUBGRADE SOILS. REFERTO CITY OF FORT COLLINS CODE SECTIONS 12-130 THROUGH12-132.9.TEMPORARY SEEDING SHALL BE UTILIZED IN THE EVENT THAT AGRADED AREA IS EXPOSED LONGER THAN 30 DAYS. THE SITESHALL BE SEEDED WITH THE APPROPRIATE SEED MIX ANDINSTALLATION METHOD AS SPECIFIED ON THE APPROVEDLANDSACPE PLANS.10.A COMMERCIAL FERTILIZER WITH THE FOLLOWING SPECS SHALLBE USED:11.DOWNSPOUTS DESIGNED TO DISCHARGE RUNOFF AT GROUNDSURFACE ARE TO BE PROVIDED WITH A SPLASH GUARD.12.ALL LID AND INFILTRATION PRACTICES SHALL BE BUILT AS PART OFTHE FINAL CONSTRUCTION SEQUENCE TO MINIMIZE THEPOTENTIAL FOR THESE TO BE CLOGGED WITH SEDIMENT DUE TOCONSTRUCTION ACTIVITIES ON THE SITE.INGREDIENT% AVAILABLEBY WEIGHTAPPLICATIONRATE INLBS/ACRENORTH040'80'SCALE: 1" = 40'20'PROJECT:FORT COLLINS NISSAN-KIABEST MANAGEMENT PRACTICE ITEM:PRESERVE EXISTING VEGETATIONSILT FENCEVEHICLE TRACKING CONTROLSTAGING AREAS (if applicable)CONSTRUCTION FENCE (if applicable)ROCK SOCKSCONCRETE WASHOUT AREA(if applicable)TEMPORARY SEEDINGINLET PROTECTION (EXIST. & PROP.)1.COLUMNS SHOWN BELOW FOR TEMPORARY EROSION CONTROL ITEMS REPRESENT PHASE OFCONSTRUCTION INCREMENTS, NOT SPECIFIC TIME DURATIONS.2.CONTRACTOR IS RESPONSIBLE FOR REGULAR MAINTENANCE OF ALL BMPs.MOBILIZATIONDEMOLITIONUTILITYINSTALLATIONBUILDINGCONSTRUCTIONSITE GRADING& PAVINGFINAL LANDSCAPING& STABILIZATIONPHASE OF CONSTRUCTIONEROSION CONTROL SEQUENCING
SMOKEYDRIVECOLLEGE AVE (HWY 287)
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KIA DEALERSHIP BUILDINGEXISTINGBUILDINGROCK OUTCROPPING LIMITSOS13.27FOSSIL CREEKFLOODPLAIN/FLOODWAYFOSSIL CREEKFLOODPLAIN/FLOODWAYEROSION BUFFER LIMITSEXISTING WETLANDSEXISTING WETLANDSFLOODPLAIN
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FLOODPLAIN CROSS SECTION #2000100-YEAR FLOOD ELEVATION -4983.4 (NGVD 29)4986.6 (NAVD 88)LOT 23LOT 24LOT 25LOT 26LOT 27LOT 28LOT 31LOT 29LOT 32LOT 1LOT 2LOT 30MILKY WAY DRIVEMARS DRIVE
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LOT 1BLOCK 1LOT 2BLOCK 1LOT 1BLOCK 2TRACT ATRACT BTRACT CTRACT DFLOODPLAIN CROSS SECTION #31957100-YEAR FLOOD ELEVATION -4956.0 (NGVD 29)4959.2 (NAVD 88)OS26.36FOSSIL CREEK TRAIL CULVERTEXISTING Q100 = 31.7 CFSPROPOSED Q100 = 23.7 CFSEXISTING Q10 = 12.4 CFSPROPOSED Q10 = 9.6 CFSEXISTING Q2 = 7.3 CFSPROPOSED Q2 = 5.8 CFSWETLANDS RESTORATION AREA0.070 ACRES AT BOTTOM OF PONDBIORETENTIONPOND A3EROSION BUFFER LIMITSFLOODPLAIN CROSS SECTION
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FLOODPLAIN CROSS SECTION #32498100-YEAR FLOOD ELEVATION -4958.6 (NGVD 29)4961.8 (NAVD 88)FLOODPLAIN CROSS SECTION #1145100-YEAR FLOOD ELEVATION -4983.4 (NGVD 29)4986.6 (NAVD 88)FLOODPLAIN CROSS SECTION #2304100-YEAR FLOOD ELEVATION -4983.4 (NGVD 29)4986.6 (NAVD 88) TURF REINFORCEMENT MATTINGUNDERGROUNDWQ (POND C2)PROPOSED STORM SEWER (TYP.)LANG GULCH OUTFALLPOND A1 RELEASE = 2.67 CFS30' DRAINAGE EASEMENTFFE=5020.00FFE=5022.25U210041" = 80'1" = N/ANORTH
6/14/2022 9:05:28 AMC:\UNITED CIVIL DROPBOX\PROJECTS\U21004 - NISSAN DEALERSHIP\CADD\CP\C6.00 - OVERALL DRAINAGE PLAN.DWGC6.00 - OVERALL DRAINAGE PLANKRB JRS
OVERALL DRAINAGE PLAN080'160'SCALE: 1" = 80'40'PREPARED FOR:JOB NUMBERSHEET NUMBERSHEETSOFDATE SUBMITTED:VERTICAL:HORIZONTAL:SCALEPRELIMINARYP
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The engineer preparing these plans will not be responsible for, or liable for, unauthorized
changes to or uses of these plans. All changes to the plans must be in writing and must
be approved by the preparer of these plans.
NO.BY DATE
CAUTIONREVISIONS:CIVIL ENGINEERING & CONSULTINGUNITED CIVILDesign Group19 OLD TOWN SQUARE #238FORT COLLINS, CO 80524(970) 530-4044www.unitedcivil.comTCC CORPORATION
FORT COLLINS NISSAN-KIA
6/15/2022U21004 PROPOSED MAJOR CONTOURPROPOSED MINOR CONTOURLEGENDEXISTING MAJOR CONTOUREXISTING MINOR CONTOUREXISTING PROPERTY BOUNDARYRIGHT OF WAYXX.XXBASIN DESIGNATIONBASIN AREA (ACRE)PROPOSED BASINPROPOSED BASIN LINE1.REFER TO SHEETS C6.01-C6.02 FOR DETAILED DRAINAGE PLANS.NOTES1.THE DEVELOPER SHALL OBTAIN A FLOODPLAIN USE PERMIT FROMTHE CITY OF FORT COLLINS AND PAY ALL APPLICABLEFLOODPLAIN USE PERMIT FEES PRIOR TO COMMENCING ANYCONSTRUCTION ACTIVITY (BUILDING OF STRUCTURES, GRADING,FILL, DETENTION PONDS, BIKE PATHS, PARKING LOTS, UTILITIES,LANDSCAPED AREAS, FLOOD CONTROL CHANNELS, ETC.) WITHINTHE FOSSIL CREEK FLOODPLAIN/FLOODWAY AND EROSIONBUFFER LIMITS. ALL ACTIVITIES WITHIN THE FLOODPLAIN ANDEROSION BUFFER ARE SUBJECT TO THE REQUIREMENTS OFCHAPTER 10 OF THE FORT COLLINS MUNICIPAL CODE.2.CONSTRUCTION OF NEW STRUCTURES, HARD SURFACE PATHS,WALKWAYS, DRIVEWAYS, WALLS, AND PARKING AREAS ISPROHIBITED IN THE FLOODWAY UNLESS NO-RISE CONDITIONS AREMET, PER SECTION 10-45 OF CITY CODE. ANY CONSTRUCTIONACTIVITIES IN THE REGULATORY FLOODWAY MUST ALSO INCLUDEA NO-RISE CERTIFICATION PREPARED BY A PROFESSIONALENGINEER LICENSED IN COLORADO.3.STORAGE OF EQUIPMENT AND MATERIALS (TEMPORARY ORPERMANENT) IS NOT ALLOWED IN THE FLOODWAY.4.ANY ITEMS IN THE FLOODWAY THAT CAN FLOAT SUCH AS BIKERACKS, PICNIC TABLES, ETC. MUST BE ANCHORED.5.A STABILITY STUDY MAY BE REQUIRED FOR WORK WITHIN THEEROSION BUFFER.6.THE NATURAL HABITAT BUFFER ZONE IS INTENDED TO BEMAINTAINED IN A NATIVE LANDSCAPE. PLEASE SEE SECTION 3.4.1OF THE LAND USE CODE FOR ALLOWABLE USES WITHIN THENATURAL HABITAT BUFFER ZONE.FLOODPLAIN NOTESC6.006933
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EA50.400.891.00A110.310.790.99A130.940.951.00B40.380.891.00B60.220.680.85B70.300.790.98C10.610.841.00C20.900.650.81C31.560.911.00C60.040.951.00E12.120.790.99FLOODPLAIN CROSS SECTION #31323100-YEAR FLOOD ELEVATION -4952.2 (NGVD 29)4955.4 (NAVD 88)FLOODPLAIN CROSS SECTION #31957100-YEAR FLOOD ELEVATION -4956.0 (NGVD 29)4959.2 (NAVD 88)TRACT CTRACT DLOT 1BLOCK 2LOT 1BLOCK 1OS26.360.250.31FOSSIL CREEK TRAIL CULVERTEXISTING Q100 = 31.74 CFSPROPOSED Q100 = 24.32 CFSEXISTING Q10 = 12.4 CFSPROPOSED Q10 = 9.6 CFSEXISTING Q2 = 7.3 CFSPROPOSED Q2 = 5.8 CFSCCUNDERGROUNDPOND C1FOSSIL CREEK
UNDERGROUND WATERQUALITY TREATMENT POND C2(SEE DRAINAGE REPORT)NISSAN DEALERSHIPBUILDINGFFE=5020.00C50.200.881.00C40.650.881.001" = 40'1" = N/A6/14/2022 9:08:22 AMC:\UNITED CIVIL DROPBOX\PROJECTS\U21004 - NISSAN DEALERSHIP\CADD\CP\C6.0X - DETAILED DRAINAGE PLANS.DWGC6.0X - DETAILED DRAINAGE PLANS####C6.0169DETAILED DRAINAGE PLAN - NORTH
PREPARED FOR:JOB NUMBERSHEET NUMBERSHEETSOFDATE SUBMITTED:VERTICAL:HORIZONTAL:SCALEPRELIMINARYPLANSNOT FOR CONSTRUCTIONPROJ. MGR:DRAWING NAME:PATH:DESIGNER:DATE:TIME:
The engineer preparing these plans will not be responsible for, or liable for, unauthorized
changes to or uses of these plans. All changes to the plans must be in writing and must
be approved by the preparer of these plans.
NO.BY DATE
CAUTIONREVISIONS:CIVIL ENGINEERING & CONSULTINGUNITED CIVILDesign Group19 OLD TOWN SQUARE #238FORT COLLINS, CO 80524(970) 530-4044www.unitedcivil.comTCC CORPORATION
FORT COLLINS NISSAN-KIA
6/15/2022U2100434X.XXX.XXXX.XXBASIN DESIGNATIONBASIN AREA (ACRE)5 - YR RUNOFF COEFF.100 - YR RUNOFF COEFF.DESIGN POINTFLOW DIRECTIONDPD1LEGENDCOLLEGE AVE (HWY 287)VENUS AVENUEMILKY WAY DRIVENKEYMAP1.REFER TO SHEET C6.00 FOR THE OVERALL DRAINAGE PLAN.NOTES1.THE DEVELOPER SHALL OBTAIN A FLOODPLAIN USE PERMIT FROMTHE CITY OF FORT COLLINS AND PAY ALL APPLICABLEFLOODPLAIN USE PERMIT FEES PRIOR TO COMMENCING ANYCONSTRUCTION ACTIVITY (BUILDING OF STRUCTURES, GRADING,FILL, DETENTION PONDS, BIKE PATHS, PARKING LOTS, UTILITIES,LANDSCAPED AREAS, FLOOD CONTROL CHANNELS, ETC.) WITHINTHE FOSSIL CREEK FLOODPLAIN/FLOODWAY AND EROSIONBUFFER LIMITS. ALL ACTIVITIES WITHIN THE FLOODPLAIN ANDEROSION BUFFER ARE SUBJECT TO THE REQUIREMENTS OFCHAPTER 10 OF THE FORT COLLINS MUNICIPAL CODE.2.CONSTRUCTION OF NEW STRUCTURES, HARD SURFACE PATHS,WALKWAYS, DRIVEWAYS, WALLS, AND PARKING AREAS ISPROHIBITED IN THE FLOODWAY UNLESS NO-RISE CONDITIONS AREMET, PER SECTION 10-45 OF CITY CODE. ANY CONSTRUCTIONACTIVITIES IN THE REGULATORY FLOODWAY MUST ALSO INCLUDEA NO-RISE CERTIFICATION PREPARED BY A PROFESSIONALENGINEER LICENSED IN COLORADO.3.STORAGE OF EQUIPMENT AND MATERIALS (TEMPORARY ORPERMANENT) IS NOT ALLOWED IN THE FLOODWAY.4.ANY ITEMS IN THE FLOODWAY THAT CAN FLOAT SUCH AS BIKERACKS, PICNIC TABLES, ETC. MUST BE ANCHORED.5.A STABILITY STUDY MAY BE REQUIRED FOR WORK WITHIN THEEROSION BUFFER.6.THE NATURAL HABITAT BUFFER ZONE IS INTENDED TO BEMAINTAINED IN A NATIVE LANDSCAPE. PLEASE SEE SECTION 3.4.1OF THE LAND USE CODE FOR ALLOWABLE USES WITHIN THENATURAL HABITAT BUFFER ZONE.FLOODPLAIN NOTES
BIORETENTION POND A2DETENTION POND A1BIORETENTIONVENUS AVENUECOLLEGE AVE (HWY 287)MILKY WAY DRIVEMARS DRIVE
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#5817EXISTING#224EXISTING#230EXISTINGLOT 1RISING SONMANORSUBDIVISIONA10.950.250.31A20.570.250.31A30.490.760.95A40.600.690.86A50.400.891.00A60.200.710.88A70.390.851.00A80.110.951.00A90.140.951.00A100.680.780.98A110.310.790.99A120.560.811.00A130.940.951.00A140.440.790.99A150.860.881.00A160.770.951.00B10.460.250.31B31.100.740.93B50.540.851.00B60.220.680.85B70.300.790.98OS13.270.550.69D10.490.720.90POND A3LOT 2BLOCK 1TRACT ATRACT BLOT 1BLOCK 2DETENTIONPOND A1B20.480.250.31KIA DEALERSHIPBUILDINGWSEL = 5010.00WQ WSEL = 5010.00WQ WSEL = 5007.40WSEL = 5010.00FFE=5022.251" = 40'1" = N/A6/14/2022 9:08:31 AMC:\UNITED CIVIL DROPBOX\PROJECTS\U21004 - NISSAN DEALERSHIP\CADD\CP\C6.0X - DETAILED DRAINAGE PLANS.DWGC6.0X - DETAILED DRAINAGE PLANS####C6.0269DETAILED DRAINAGE PLAN - SOUTH
PREPARED FOR:JOB NUMBERSHEET NUMBERSHEETSOFDATE SUBMITTED:VERTICAL:HORIZONTAL:SCALEPRELIMINARYP
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The engineer preparing these plans will not be responsible for, or liable for, unauthorized
changes to or uses of these plans. All changes to the plans must be in writing and must
be approved by the preparer of these plans.
NO.BY DATE
CAUTIONREVISIONS:CIVIL ENGINEERING & CONSULTINGUNITED CIVILDesign Group19 OLD TOWN SQUARE #238FORT COLLINS, CO 80524(970) 530-4044www.unitedcivil.comTCC CORPORATION
FORT COLLINS NISSAN-KIA
6/15/2022U2100435X.XXX.XXXX.XXBASIN DESIGNATIONBASIN AREA (ACRE)5 - YR RUNOFF COEFF.100 - YR RUNOFF COEFF.DESIGN POINTFLOW DIRECTIONDPD1LEGENDCOLLEGE AVE (HWY 287)VENUS AVENUEMILKY WAY DRIVENKEYMAP1.REFER TO SHEET C6.00 FOR THE OVERALL DRAINAGE PLAN.NOTES1.THE DEVELOPER SHALL OBTAIN A FLOODPLAIN USE PERMIT FROMTHE CITY OF FORT COLLINS AND PAY ALL APPLICABLEFLOODPLAIN USE PERMIT FEES PRIOR TO COMMENCING ANYCONSTRUCTION ACTIVITY (BUILDING OF STRUCTURES, GRADING,FILL, DETENTION PONDS, BIKE PATHS, PARKING LOTS, UTILITIES,LANDSCAPED AREAS, FLOOD CONTROL CHANNELS, ETC.) WITHINTHE FOSSIL CREEK FLOODPLAIN/FLOODWAY AND EROSIONBUFFER LIMITS. ALL ACTIVITIES WITHIN THE FLOODPLAIN ANDEROSION BUFFER ARE SUBJECT TO THE REQUIREMENTS OFCHAPTER 10 OF THE FORT COLLINS MUNICIPAL CODE.2.CONSTRUCTION OF NEW STRUCTURES, HARD SURFACE PATHS,WALKWAYS, DRIVEWAYS, WALLS, AND PARKING AREAS ISPROHIBITED IN THE FLOODWAY UNLESS NO-RISE CONDITIONS AREMET, PER SECTION 10-45 OF CITY CODE. ANY CONSTRUCTIONACTIVITIES IN THE REGULATORY FLOODWAY MUST ALSO INCLUDEA NO-RISE CERTIFICATION PREPARED BY A PROFESSIONALENGINEER LICENSED IN COLORADO.3.STORAGE OF EQUIPMENT AND MATERIALS (TEMPORARY ORPERMANENT) IS NOT ALLOWED IN THE FLOODWAY.4.ANY ITEMS IN THE FLOODWAY THAT CAN FLOAT SUCH AS BIKERACKS, PICNIC TABLES, ETC. MUST BE ANCHORED.5.A STABILITY STUDY MAY BE REQUIRED FOR WORK WITHIN THEEROSION BUFFER.6.THE NATURAL HABITAT BUFFER ZONE IS INTENDED TO BEMAINTAINED IN A NATIVE LANDSCAPE. PLEASE SEE SECTION 3.4.1OF THE LAND USE CODE FOR ALLOWABLE USES WITHIN THENATURAL HABITAT BUFFER ZONE.FLOODPLAIN NOTES
1" = N/A1" = N/A6/14/2022 4:06:06 PMC:\UNITED CIVIL DROPBOX\PROJECTS\U21004 - NISSAN DEALERSHIP\CADD\CP\C7.0X - CONSTRUCTION DETAILS.DWGC7.0X - CONSTRUCTION DETAILS####C7.3071EROSION CONTROL CONSTRUCTION DETAILS
PREPARED FOR:JOB NUMBERSHEET NUMBERSHEETSOFDATE SUBMITTED:VERTICAL:HORIZONTAL:SCALEPRELIMINARYPLANSNOT FOR CONSTRUCTIONPROJ. MGR:DRAWING NAME:PATH:DESIGNER:DATE:TIME:
The engineer preparing these plans will not be responsible for, or liable for, unauthorized
changes to or uses of these plans. All changes to the plans must be in writing and must
be approved by the preparer of these plans.
NO.BY DATE
CAUTIONREVISIONS:CIVIL ENGINEERING & CONSULTINGUNITED CIVILDesign Group19 OLD TOWN SQUARE #238FORT COLLINS, CO 80524(970) 530-4044www.unitedcivil.comTCC CORPORATION
FORT COLLINS NISSAN-KIA
6/15/2022U2100470
1" = N/A1" = N/A6/14/2022 4:06:14 PMC:\UNITED CIVIL DROPBOX\PROJECTS\U21004 - NISSAN DEALERSHIP\CADD\CP\C7.0X - CONSTRUCTION DETAILS.DWGC7.0X - CONSTRUCTION DETAILS####C7.3171EROSION CONTROL CONSTRUCTION DETAILS
PREPARED FOR:JOB NUMBERSHEET NUMBERSHEETSOFDATE SUBMITTED:VERTICAL:HORIZONTAL:SCALEP
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The engineer preparing these plans will not be responsible for, or liable for, unauthorized
changes to or uses of these plans. All changes to the plans must be in writing and must
be approved by the preparer of these plans.
NO.BY DATE
CAUTIONREVISIONS:CIVIL ENGINEERING & CONSULTINGUNITED CIVILDesign Group19 OLD TOWN SQUARE #238FORT COLLINS, CO 80524(970) 530-4044www.unitedcivil.comTCC CORPORATION
FORT COLLINS NISSAN-KIA
6/15/2022U2100471CWAVTCDANDY CURB BAGOVERFLOWGAPCURB ANDGUTTER INLETCURBFILTERLOW PROFILE WITHGUTTER FOR SAFETYAND CURB APPEALLIFTINGSTRAPSSTORM SEWERGRATE COMPLETELYCOVERED BYHI-FLOW FABRICDANDY BAGVELCROCLOSURELIFT STRAPSUSED FOR EASYMOVEMENT ANDINSPECTION OFUNITSTORMSEWERGRATEDANDY BAGSTORMSEWERGRATEDANDY CURBMANHOLECURB OPENINGWITHOUT GRATECURB FILTEROVERFLOWGAPAGGREGATEPOUCHINLET FILTER DETAILSCOMBINATION INLET FILTER - DP1TYPE R INLET FILTER - DP2AREA INLET FILTER - DP3NOTES:1.INLET FILTERS SHALL BE DANDY PRODUCTS AS SHOWN OR APPROVED EQUAL. PLAN VIEWREFERS TO DANDY PRODUCTS AS "DP-#" AS DESIGNATED ON THIS DETAIL.1
4,514
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FCMaps
This map is a user generated static output from the City of Fort Collins FCMaps
Internet mapping site and is for reference only. Data layers that appear on this
map may or may not be accurate, current, or otherwise reliable.
City of Fort Collins - GIS
572.0
1:
WGS_1984_Web_Mercator_Auxiliary_Sphere
Feet572.00286.00
Notes
Legend
3,430
FEMA Floodplain
FEMA High Risk - Floodway
FEMA High Risk - 100 Year
FEMA Moderate Risk - 100 / 500 Year
City Floodplains
City High Risk - Floodway
City High Risk - 100 Year
City Moderate Risk - 100 Year
City Limits
National Flood Hazard Layer FIRMette
0 500 1,000 1,500 2,000250
Feet
Ü
SEE FIS REPORT FOR DETAILED LEGEND AND INDEX MAP FOR FIRM PANEL LAYOUT
SPECIAL FLOOD
HAZARD AREAS
Without Base Flood Elevation (BFE)
Zone A, V, A99
With BFE or DepthZone AE, AO, AH, VE, AR
Regulatory Floodway
0.2% Annual Chance Flood Hazard, Areas
of 1% annual chance flood with average
depth less than one foot or with drainage
areas of less than one square mileZone X
Future Conditions 1% Annual
Chance Flood HazardZone X
Area with Reduced Flood Risk due to
Levee. See Notes.Zone X
Area with Flood Risk due to LeveeZone D
NO SCREEN Area of Minimal Flood Hazard Zone X
Area of Undetermined Flood HazardZone D
Channel, Culvert, or Storm Sewer
Levee, Dike, or Floodwall
Cross Sections with 1% Annual Chance
17.5 Water Surface Elevation
Coastal Transect
Coastal Transect Baseline
Profile Baseline
Hydrographic Feature
Base Flood Elevation Line (BFE)
Effective LOMRs
Limit of Study
Jurisdiction Boundary
Digital Data Available
No Digital Data Available
Unmapped
This map complies with FEMA's standards for the use of
digital flood maps if it is not void as described below.
The basemap shown complies with FEMA's basemap
accuracy standards
The flood hazard information is derived directly from the
authoritative NFHL web services provided by FEMA. This map
was exported on 3/4/2021 at 3:31 PM and does not
reflect changes or amendments subsequent to this date and
time. The NFHL and effective information may change or
become superseded by new data over time.
This map image is void if the one or more of the following map
elements do not appear: basemap imagery, flood zone labels,
legend, scale bar, map creation date, community identifiers,
FIRM panel number, and FIRM effective date. Map images for
unmapped and unmodernized areas cannot be used for
regulatory purposes.
Legend
OTHER AREAS OF
FLOOD HAZARD
OTHER AREAS
GENERAL
STRUCTURES
OTHER
FEATURES
MAP PANELS
8
B 20.2
The pin displayed on the map is an approximate
point selected by the user and does not represent
an authoritative property location.
1:6,000
105°5'1"W 40°30'39"N
105°4'24"W 40°30'11"N
Basemap: USGS National Map: Orthoimagery: Data refreshed October, 2020
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C ONTRACTOR I NSERTS (P ERMIT , I NSPECTION R EPORTS , ETC .)