HomeMy WebLinkAboutPARKING AT 620 S. LEMAY AVE. - MJA/FDP - FDP150009 - SUBMITTAL DOCUMENTS - ROUND 1 - STORMWATER MANAGEMENT PLANSTORMWATER
MANAGEMENT PLAN (SWMP)
FOR
Parking at 620 S. Lemay Avenue
620 S. Lemay
Fort Collins, CO 80524
Prepared for:
CS Design, Inc.
2519 S. Shields St. #129
Fort Collins, CO 80526
Prepared by:
www.quality-engineering.com
1501 Academy Court, Suite 201
Fort Collins, Colorado 80524
(970) 416-7891
QE Project No: 1060-003
Date: March 11, 2015
Table of Contents
Introduction ..................................................................................................................................... 1
1.1 Stormwater Quality Statement ......................................................................................... 1
1.2 SWMP Objective.............................................................................................................. 1
1.3 Location ............................................................................................................................ 1
1.4 Project Description ........................................................................................................... 1
Site Description ............................................................................................................................... 2
2.1 Construction Activity Description ................................................................................... 2
2.2 Proposed Sequence for Major Activities .......................................................................... 2
2.3 Area Estimates.................................................................................................................. 2
2.4 Runoff Coefficient and Soil Description .......................................................................... 2
2.5 Existing Vegetation .......................................................................................................... 3
2.6 Location and Description of Other Potential Pollution Sources ...................................... 3
2.7 Non-Stormwater Components of Discharge .................................................................... 3
2.8 Minimization of Directly Connected Impervious Areas .................................................. 3
2.9 Receiving Waters ............................................................................................................. 3
BMPs for Stormwater Pollution Prevention ................................................................................... 3
3.1 Erosion and Sediment Controls ........................................................................................ 3
3.2 Erosion Control Sequencing............................................................................................. 5
3.3 Materials Handling and Spill Prevention ......................................................................... 6
Other Controls ................................................................................................................................. 7
Final Stabilization and Long-term Stormwater Quality.................................................................. 8
Inspection and Maintenance Procedures ......................................................................................... 8
References ....................................................................................................................................... 9
APPENDIX A ................................................................................................................................. 9
Introduction
1.1 Stormwater Quality Statement
Stormwater quality best management practices shall be implemented to minimize soil
erosion, sedimentation, increased pollutant loads and changed water flow characteristics
resulting from land disturbing activity, to the maximum extent practicable, so as to
minimize pollution of receiving waters.
1.2 SWMP Objective
The objective of this Stormwater Management Plan (SWMP) for the Parking at 620 S.
Lemay Avenue, is to identify the Best Management Practices (BMP’s) which, when
implemented, will meet the requirements of the City of Fort Collins SWMP Standards.
The SWMP goal is to, “Identify possible pollutant sources that may contribute pollutants
to stormwater, and identify BMP’s that, when implemented, will reduce or eliminate any
possible water quality impacts. The SWMP must be completed and implemented at the
time the project breaks ground, and revised if necessary as construction proceeds to
accurately reflect the conditions and practices at the site.”
The SWMP is a “living” document which should be modified and updated through the
course of site construction. Pollutant sources should be continuously evaluated, BMP’s
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 SWMP Administrator for the site. The SWMP Administrator 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.
1.3 Location
The subject site is being developed for the Parking at 620 S. Lemay Avenue. The proposed
site is located in the northwest quarter (NW ¼) of the northwest quarter (NW ¼) of Section
18, Township 7 North, Range 68 West of the 6th P.M. in Larimer County, Colorado.
Specifically, the property is located at the southeast corner of Poudre River Drive and
Hoffman Mill Road. More generally, the property is located at the northeast corner of
Lemay Avenue and Riverside Avenue.
1.4 Project Description
The property is parcel number 8718200035 of the Poudre River Business Park and is
currently 0.99 acres of undeveloped land surrounded by undeveloped property to the
north and east, medical offices to the northwest, Concentra Urgent Care to the west, and
East Laurel St. to the south. Hoffman Mill Road is located directly west of the property
and acts as its only access. Both existing Hoffman Mill Road and Poudre River Drive are
paved with curb, gutter, sidewalk, and utilities installed. Hoffman Mill Road to the
southwest and E. Laurel Street to the south of the property are unpaved, gravel roads. E.
Laurel Street is a private street.
The proposed development will consist of the construction of a 37 spot parking lot that
will act as overflow parking for the Concentra Urgent Care directly across Hoffman Mill
Road. The parking lot will be paved asphalt with curb and gutter. Parking stalls will
consist of pervious pavers. A rain garden will be installed on the northwest corner of the
proposed site.
Site Description
2.1 Construction Activity Description
Construction activity includes installation of BMP’s, grading, utility (storm, sanitary sewer
and waterline) construction, driveway/parking lot construction, drainage conveyance
(swale and pan) construction, drainage detention (rain garden) construction, and building
construction.
2.2 Proposed Sequence for Major Activities
The sequence for major construction activities includes the installation of BMP’s, overlot
grading including drainage conveyance construction, installation of utilities (underground
storm water, water and sanitary sewar), final grading of the lot and parking lot construction,
and landscaping.
Construction is expected to occur in one phase. Construction is estimated to begin July 1,
2015 and be completed in December, 2015.
2.3 Area Estimates
The entire site area, 0.99 acres will be disturbed and will be referred to as the, “Limit of
disturbance.”
2.4 Runoff Coefficient and Soil Description
According to the NRCS Web Soil Survey maps, the majority of the site consists of:
Name Soil Type Erosion
Satanta Loam, 0 to 1 Percent Slope B Light
The soil erosion potential for this soil type B is light.
2.5 Existing Vegetation
The site is lightly wooded with trunk diameters around six to eight inches. There are
moderately dense natural long grasses on the site as well. The existing ground cover is
conducive to very little erosion but can easily wash contaminants into the drainage system.
There are no existing major open channels or other drainage facilities within the site. There
are no existing irrigation ditches within the site.
2.6 Location and Description of Other Potential Pollution Sources
Potential pollutant sources include sediment, uncovered soil, fuel, concrete washouts,
building materials, and fertilizers. Reference the Erosion Control Plan in the Appendix for
the location of the staging area. The staging/stockpile area(s) may be moved to a location
no closer than 100’ from a stormwater conveyance.
2.7 Non-Stormwater Components of Discharge
Site disturbance will not exceed five feet below the existing grade, therefore having no
impact on the groundwater at lower depths.
2.8 Minimization of Directly Connected Impervious Areas
Directly connected impervious layers are surfaces which do not have infiltration
characteristics and do not flow into or through a pervious areas. The site specific
impervious layers include the asphalt parking and the concrete sidewalks. To mitigate
these DCIA’s, the asphalt drive aisle and concrete sidewalk has been designed to drain
through permeable pavement (pavers) and sub-drain into the proposed rain garden where
infiltration will occur. The design has fully restricted DCIA’s allowing for all impervious
areas to, at some point, flow through Receiving Pervious Areas (RPA).
2.9 Receiving Waters
It appears that onsite flows pond and infiltrate, without leaving the site. Existing Hoffman
Mill Road drains north to the existing inlet, where it is conveyed to the Poudre River.
Existing Poudre River Drive drains east towards the existing storm inlet, where it joins
flows from Hoffman Mill Road. Once in the existing storm, runoff is conveyed to the
Poudre River.
BMPs for Stormwater Pollution Prevention
3.1 Erosion and Sediment Controls
Once construction activity begins, Best Management Practices (BMP’s) 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 BMP’s will
be installed as shown on the enclosed Erosion Control Plans. They must be supplemented
as on-site experience proves necessary in order to control sediment, pollutant discharge,
and insure public safety. The following temporary and permanent BMP’s will be installed
and maintained to control on-site erosion and prevent sediment from traveling off-site
during construction:
Temporary BMP’s
Temporary Seeding is the establishment of a temporary vegetative cover on a graded
area that will be exposed for longer 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 (shown as VTC on the Erosion Control Plan) is a 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 to overlot grading activities. Whenever the construction entrance exists onto a
public road, the road shall be cleaned at the end of each day.
Silt Fence (shown as SF on the Erosion Control Plan) is a temporary BMP that is
typically used as filter structures in areas of sheet water flow such as landscape slopes.
A silt fence is a geotextile fabric attached to wooden posts and trenched into the ground.
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, and at the perimeter
of a construction site.
Concrete Washout Area (shown as CWA on the Erosion Control Plan) is a designated
area 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, that acts
as a temporary BMP. 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. 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.
Rock Sock (shown as RS on the Erosion Control Plan) is a temporary BMP that is
constructed of gravel that has been wrapped by wire mesh or geotextile to form an
elongated cylindrical filter. Rock socks are typically used either as a perimeter control
or as part of inlet protection. When placed at angles in the curb line, rock socks are
typically referred to as curb socks. Rock socks are intended to trap sediment from
stormwater runoff that flows onto roadways as a result of construction activities. Rock
socks can be used at the perimeter of a disturbed area or along small concentrated flow
paths to control localized sediment loading.
Wind Borne Sediment and Dust Control measures will be 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, and the timely installation
of pavement following completion of utility trenching operations and curb
construction.
Permanent BMP’s
Permanent Seeding and Planting is the 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 stormwater runoff velocity, maintains sheet flow,
protects the soil surface from erosion, promotes infiltration of runoff, and improves
wildlife habitat. The landscape plans for the site show the permanent seeding and
plantings.
Preservation of Existing Vegetation should occur where no construction activity is
expected to occur. Preservation of natural vegetation is generally a permanent BMP
and is applicable to construction sites with pre-existing vegetation. Only land needed
for building activities and vehicle traffic needs to be cleared. For this site, the existing
trees will be preserved, while the rest of the existing vegetation will be removed.
Rain Garden is a permanent Low Impact Development (LID) BMP that utilizes
multiple treatment processes to remove pollutants, including sedimentation, filtering,
adsorption, evapotranspiration and biological uptake of constituents. It also can act as
both the WQCV as well as the 100-Year detention volume, economizing the site. The
rain garden is shown on the landscape plans for the site.
Permeable Pavement (Pavers) is a permanent Low Impact Development (LID) BMP
that provides water quality treatment in an area that serves more than one purpose.
They are typically located downstream from impervious areas and are designed to
capture flow from those impervious areas, while acting as a suitable working surface.
3.2 Erosion Control Sequencing
The following is the proposed erosion control sequencing:
Prior to Construction
Preserve Existing Vegetation – Before construction commencement, areas that are not
disturbed by construction activity should be preserved as needed with construction fencing,
silt fencing, or other means to keep vehicular traffic out of the area to be left undisturbed.
For this site, the existing trees and bushes will be preserved as noted on the engineering
and landscape plans.
Inlet/Gutter Protection/Rock Socks – Rock socks will be placed at curb inlets and gutters
located adjacent to the site immediately prior to earth disturbing activities, if applicable.
Silt Fence – Before earth disturbing activities, silt fence will be placed downstream of areas
where runoff from construction activities are expected to occur. In particular for this site,
silt fence will be place downstream of the proposed stockpile area (if applicable). Silt fence
will be placed near the curb on the east side of the site.
Vehicle Tracking Control – Before construction commencement but after a portion of
asphalt demolition, vehicle tracking control shall be placed at points of ingress and egress.
It should also be placed at the stockpile area exits (if applicable).
During Construction
Wind Borne Sediment and Dust Control – Wind borne sediment and dust control measures
should be implemented during grading activities.
Slope Protection – Surface roughening, and contour furrows shall occur after rough
grading. For this site, the majority of steeper slopes that may require surface roughening
are shown on the grading and erosion control plans.
Permanent Seeding – Permanent seeding or landscaping shall be placed immediately in
areas that are final graded and where little future disturbance is expected. In particular,
permanent seeding should be included in the landscaped areas, and other areas that are not
to be disturbed as part of construction.
Temporary Seeding – The majority of the landscaped areas will be permanently
seeded/planted. However, if the roadways/parking lots do not have base course placed on
them or the lots are left disturbed without permanent stabilization 30 days after grading,
temporary seeding will be required.
Post Construction
Refer to Final Stabilization and Long-term Stormwater Quality below.
3.3 Materials Handling and Spill Prevention
The site development will include the appropriate construction staging areas. 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. Reference the
Erosion Control Plan in the Appendix for the location of the staging area (as applicable).
The staging/stockpile area(s) may be moved to a location no closer than 100’ from a
stormwater conveyance. Vehicle tracking control should be placed at the stockpile area
entrance/exit and silt fence should surround it. If the stockpile/staging area(s) is moved, the
SWMP should be updated.
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. 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 commercial building construction) is
not included within this SWMP. OSHA standards shall be followed. Concrete and asphalt
batch plants are not anticipated on this site and thus are not included in this SWMP
In the event of a spill or accident, it shall be contained and disposed of so that it will not
flow from the site or soak into the soil. Once construction is completed, concrete waste and
contaminated soil will be disposed of properly. The SWMP Administrator should be
notified of spills.
Other Controls
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.
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.
Loading and Unloading Operations: Steps should be taken to minimize the movement of soil
from the site. Contractors and laborers shall park along the street near the site as opposed to on
the lot itself to prevent unwanted tracking of soil from the site. When loading/unloading equipment
from vehicles, load/unload at the driveway or along the street near the site, to minimize the
movement of soil from the site.
Vehicle and Equipment Maintenance and Fueling: All vehicles and equipment will be fuelled
offsite, before arriving to the site. Maintenance and repair of vehicles and equipment will also
occur offsite.
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. Final stabilization
shall be performed in accordance with the City of Fort Collins Stormwater Standards Manual.
Upon final stabilization, temporary BMP’s may be removed, unless they are required to remain in
place for future phasing.
It is anticipated that the future Parking at 620 S. Lemay Avenue will produce minor sediment and
debris that previously did not exist in the undeveloped condition. To account for this, water quality
enhancements are provided in the rain garden. Runoff from the asphalt drive aisle and concrete
sidewalks is conveyed to the permeable pavers where sediment settles and debris is intercepted.
Inspection and Maintenance Procedures
The temporary BMP’s will be inspected and documented at a minimum of once every 14 days and
within 24 hours after each precipitation or snowmelt event. The SWMP will be kept up-to-date
with inspection records, maintenance procedures, and changes. Records should include complete
inspection reports for each inspection, maintenance and repair reports as a result of the inspections,
and records of maintenance as indicated in the City of Fort Collins Stormwater Standards Manual,
manufacturer’s specifications, or other acceptable sources. 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.
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 should be kept on site and made available
upon request.
Inspections must include the observation of the construction site perimeter, runoff discharge
points, disturbed areas, staging areas (including concrete washout areas and fueling areas), erosion
and sediment control measures identified in this SWMP, and any other structural BMP’s that may
require maintenance. The inspection must determine if there is evidence of or potential for
pollutants to enter the drainage system and if they should be modified, replaced, or added to.
The following includes some maintenance procedures:
Erosion and sediment control measures determined, upon inspection, to be in need of
repair shall be maintained as soon as possible on items or areas identified in the
inspection report. Most repairs should be completed within 24 to 48 hours.
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.
Rock at inlet protection will be checked regularly for sediment buildup which will
prevent drainage. If the rock is clogged with silt, it will be removed and cleaned or
replaced.
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.
References
“City of Fort Collins Stormwater Criteria Manual”, City of Fort Collins, Adopted December
2011
Natural Resources Conservation Service Web Soil Survey at websoilsurvey.nrcs.usda.gov/app
Urban Storm Drainage Criteria Manual, Volumes 1, 2, and 3, Urban Drainage and Flood Control
District, April 2008
APPENDIX A
Erosion and Sediment Control Escrow/Security Calculation for The City of Fort Collins
Erosion Control Plan
Erosion Control Details
Project: Disturbed Acres: 0.99
EROSION CONTROL BMPs Units
Estimated
Quantity
Unit
Price
Total
Price
Ea. 13 $150.00 $1,950.00
Ea. 1 $100.00 $100.00
Ea. 1 $928.00 $928.00
Ea. 1 $1,750.00 $1,750.00
Ea. 2 $150.00 $300.00
Sub-Total: $4,728.00
1.5 x Sub-Total: $7,092.00
Amount of security: $7,092.00
Total Acres x Price/acre: $218.00
$1,090.00 Sub-Total: $218.00
1.5 x Sub-Total: $327.00
Amount to Re-seed: $327.00
Minimum escrow amount: $3,000.00
Erosion Control Escrow: $7,092.00
Miniumum Escrow Amount
Parking at 620 S. Lemay
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”
Rock Sock (Curb)
Concrete Washout Area
Final Escrow Amount
Waddle Dike
Erosion and Sediment Control Escrow/Security Calculation
for The City of Fort Collins
BMP Amount
Vehical Tracking Pad
Reseeding Amount
Inlet Protection
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(1.) THE EROSION CONTROL INSPECTOR MUST BE NOTIFIED AT LEAST TWENTY-FOUR (24) HOURS PRIOR TO
ANY CONSTRUCTION ON THIS SITE.
(2.) THERE SHALL BE NO EARTH-DISTURBING ACTIVITY OUTSIDE THE LIMITS DESIGNATED ON THE ACCEPTED
PLANS.
(3.) ALL REQUIRED PERIMETER SILT AND CONSTRUCTION FENCING SHALL BE INSTALLED PRIOR TO ANY LAND
DISTURBING ACTIVITY (STOCKPILING, STRIPPING, GRADING, ETC). ALL OTHER REQUIRED EROSION
CONTROL MEASURES SHALL BE INSTALLED AT THE APPROPRIATE TIME IN THE CONSTRUCTION SEQUENCE
AS INDICATED IN THE APPROVED PROJECT SCHEDULE, CONSTRUCTION PLANS, AND EROSION CONTROL
REPORT.
(4.) AT ALL TIMES DURING CONSTRUCTION, THE DEVELOPER SHALL BE RESPONSIBLE FOR PREVENTING AND
CONTROLLING ON-SITE EROSION INCLUDING KEEPING THE PROPERTY SUFFICIENTLY WATERED SO AS TO
MINIMIZE WIND BLOWN SEDIMENT. THE DEVELOPER SHALL ALSO BE RESPONSIBLE FOR INSTALLING AND
MAINTAINING ALL EROSION CONTROL FACILITIES SHOWN HEREIN.
(5.) PRE-DISTURBANCE VEGETATION SHALL BE PROTECTED AND RETAINED WHEREVER POSSIBLE. REMOVAL
OR DISTURBANCE OF EXISTING VEGETATION SHALL BE LIMITED TO THE AREA(S) REQUIRED FOR
IMMEDIATE CONSTRUCTION OPERATIONS, AND FOR THE SHORTEST PRACTICAL PERIOD OF TIME.
(6.) ALL SOILS EXPOSED DURING LAND DISTURBING ACTIVITY (STRIPPING, GRADING, UTILITY INSTALLATIONS,
STOCKPILING, FILLING, ETC.) SHALL BE KEPT IN A ROUGHENED CONDITION BY RIPPING OR DISKING ALONG
LAND CONTOURS UNTIL MULCH, VEGETATION, OR OTHER PERMANENT EROSION CONTROL BMPS ARE
INSTALLED. NO SOILS IN AREAS OUTSIDE PROJECT STREET RIGHTS-OF-WAY SHALL REMAIN EXPOSED BY
LAND DISTURBING ACTIVITY FOR MORE THAN THIRTY (30) DAYS BEFORE REQUIRED TEMPORARY OR
PERMANENT EROSION CONTROL (E.G. SEED/MULCH, LANDSCAPING, ETC.) IS INSTALLED, UNLESS
OTHERWISE APPROVED BY THE CITY/COUNTY.
(7.) IN ORDER TO MINIMIZE EROSION POTENTIAL, ALL TEMPORARY (STRUCTURAL) EROSION CONTROL
MEASURES SHALL:
(A.) BE INSPECTED AT A MINIMUM OF ONCE EVERY TWO (2) WEEKS AND AFTER EACH SIGNIFICANT STORM
EVENT AND REPAIRED OR RECONSTRUCTED AS NECESSARY IN ORDER TO ENSURE THE CONTINUED
PERFORMANCE OF THEIR INTENDED FUNCTION.
(B.) REMAIN IN PLACE UNTIL SUCH TIME AS ALL THE SURROUNDING DISTURBED AREAS ARE SUFFICIENTLY
STABILIZED AS DETERMINED BY THE EROSION CONTROL INSPECTOR.
(C.) BE REMOVED AFTER THE SITE HAS BEEN SUFFICIENTLY STABILIZED AS DETERMINED BY THE
EROSION CONTROL INSPECTOR.
(8.) WHEN TEMPORARY EROSION CONTROL MEASURES ARE REMOVED, THE DEVELOPER SHALL BE
RESPONSIBLE FOR THE CLEAN UP AND REMOVAL OF ALL SEDIMENT AND DEBRIS FROM ALL DRAINAGE
INFRASTRUCTURE AND OTHER PUBLIC FACILITIES.
(9.) THE CONTRACTOR SHALL IMMEDIATELY CLEAN UP ANY CONSTRUCTION MATERIALS INADVERTENTLY
DEPOSITED ON EXISTING STREETS, SIDEWALKS, OR OTHER PUBLIC RIGHTS OF WAY, AND MAKE SURE
STREETS AND WALKWAYS ARE CLEANED AT THE END OF EACH WORKING DAY.
(10.) ALL RETAINED SEDIMENTS, PARTICULARLY THOSE ON PAVED ROADWAY SURFACES, SHALL BE REMOVED
AND DISPOSED OF IN A MANNER AND LOCATION SO AS NOT TO CAUSE THEIR RELEASE INTO ANY WATERS
OF THE UNITED STATES.
(11.) NO SOIL STOCKPILE SHALL EXCEED TEN (10) FEET IN HEIGHT. ALL SOIL STOCKPILES SHALL BE
PROTECTED FROM SEDIMENT TRANSPORT BY SURFACE ROUGHENING, WATERING, AND PERIMETER SILT
FENCING. ANY SOIL STOCKPILE REMAINING AFTER THIRTY (30) DAYS SHALL BE SEEDED AND MULCHED.
(12.) THE STORMWATER VOLUME CAPACITY OF DETENTION PONDS WILL BE RESTORED AND STORM SEWER
LINES WILL BE CLEANED UPON COMPLETION OF THE PROJECT AND BEFORE TURNING THE MAINTENANCE
OVER TO THE CITY/COUNTY OR HOMEOWNERS ASSOCIATION (HOA).
(13.) CITY ORDINANCE AND COLORADO DISCHARGE PERMIT SYSTEM (CDPS) REQUIREMENTS MAKE IT
UNLAWFUL TO DISCHARGE OR ALLOW THE DISCHARGE OF ANY POLLUTANT OR CONTAMINATED WATER
FROM CONSTRUCTION SITES. POLLUTANTS INCLUDE, BUT ARE NOT LIMITED TO DISCARDED BUILDING
MATERIALS, CONCRETE TRUCK WASHOUT, CHEMICALS, OIL AND GAS PRODUCTS, LITTER, AND SANITARY
WASTE. THE DEVELOPER SHALL AT ALL TIMES TAKE WHATEVER MEASURES ARE NECESSARY TO ASSURE
THE PROPER CONTAINMENT AND DISPOSAL OF POLLUTANTS ON THE SITE IN ACCORDANCE WITH ANY AND
ALL APPLICABLE LOCAL, STATE, AND FEDERAL REGULATIONS.
(14.) A DESIGNATED AREA SHALL BE PROVIDED ON SITE FOR CONCRETE TRUCK CHUTE WASHOUT. THE AREA
SHALL BE CONSTRUCTED SO AS TO CONTAIN WASHOUT MATERIAL AND LOCATED AT LEAST FIFTY (50)
FEET AWAY FROM ANY WATERWAY DURING CONSTRUCTION. UPON COMPLETION OF CONSTRUCTION
ACTIVITIES THE CONCRETE WASHOUT MATERIAL WILL BE REMOVED AND PROPERLY DISPOSED OF PRIOR
TO THE AREA BEING RESTORED.
(15.) TO ENSURE THAT SEDIMENT DOES NOT MOVE OFF OF INDIVIDUAL LOTS ONE OR MORE OF THE
C7.5
PARKING AT 620 S. LEMAY AVE.
620 S. LEMAY AVENUE
FORT COLLINS, CO 80524
POUDRE RIVER BUSINESS PARK, FOURTH FILING
FOLLOWING SEDIMENT/EROSION CONTROL BMPS SHALL BE INSTALLED AND MAINTAINED UNTIL THE LOTS
ARE SUFFICIENTLY STABILIZED, AS DETERMINED BY THE EROSION CONTROL INSPECTOR.
(A.) ALONG LOT PERIMETER.
(B.) OTHER LOCATIONS, IF NEEDED.
(16.) CONDITIONS IN THE FIELD MAY WARRANT EROSION CONTROL MEASURES IN ADDITION TO WHAT IS
SHOWN ON THESE PLANS. THE DEVELOPER SHALL IMPLEMENT WHATEVER MEASURES ARE DETERMINED
NECESSARY, AS DIRECTED BY THE CITY/COUNTY.
EROSION CONTROL PLAN
00 10' 20' 40'
1"=20' C5.0
FOR BURIED UTILITY INFORMATION
THREE (3) BUSINESS DAYS
BEFORE YOU DIG
CALL 811
(OR 1-800-922-1987)
UTILITY NOTIFICATION
CENTER OF COLORADO (UNCC)
WWW.UNCC.ORG
R
CITY OF FORT COLLINS, COLORADO
UTILITY PLAN APPROVAL
PARKING AT 620 S. LEMAY AVE.
620 S. LEMAY AVENUE
FORT COLLINS, CO 80524
POUDRE RIVER BUSINESS PARK, FOURTH FILING