HomeMy WebLinkAboutSPOONS-LIGHTFIELD ENTERPRISES, INC. - PDP/FDP - FDP150003 - SUBMITTAL DOCUMENTS - ROUND 1 - STORMWATER MANAGEMENT PLANSTORMWATER
MANAGEMENT PLAN (SWMP)
FOR
Lightfield Enterprises, Inc.
2600 Midpoint Drive
Fort Collins, CO 80525
Prepared for:
SDP Architecture
633 Agate Court
Fort Collins, CO 80525
Prepared by:
www.quality-engineering.com
1501 Academy Court, Suite 201
Fort Collins, Colorado 80524
(970) 416-7891
QE Project No: 7025-002
Date: January 21, 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 ................................................................................... 4
3.1 Erosion and Sediment Controls ........................................................................................ 4
3.2 Erosion Control Sequencing............................................................................................. 6
3.3 Materials Handling and Spill Prevention ......................................................................... 7
Other Controls ................................................................................................................................. 7
Final Stabilization and Long-term Stormwater Quality.................................................................. 8
Inspection and Maintenance Procedures ......................................................................................... 8
References ....................................................................................................................................... 9
APPENDIX A ............................................................................................................................... 10
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 Vogel Concrete, 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 Vogel Concrete Project. It is located in the southeast
quarter (SE ¼) of the northwest quarter (NW ¼) of Section 20, Township 7 North, Range
68 West of the 6th P.M. in Larimer County, Colorado. Specifically, the property is located
on the north side of Midpoint Drive, about halfway between South Timberline Road and
Sharp Point Drive. More generally, southeast of South Timberline Road and East Prospect
Road. The property address is 2600 Midpoint Drive, Fort Collins, Colorado, 80525.
1.4 Project Description
The Vogel Concrete site (referred herein as “the site” or “this site”) contains
approximately 0.86 acres of disturbed area. The proposed development will consist of
the construction of two buildings that will act as office and storage space. The two
buildings (4,900 and 2,218) S.F. will be connected via a sister wall and will act as one
(7,118) S.F. building. A drive aisle will be constructed and will include asphalt and
impervious pavers. The northern portion of the site will be a gravel road-base surface
and will act as site storage.
Historically, the majority of the site slopes to the southeast at approximately 0.5% towards
Midpoint Drive.
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/detention pond)
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 (swale and pan) construction, installation of
utilities (underground storm water and sanitary sewer), final grading of the lot and building
pads, building construction, and landscaping.
Construction is expected to occur in one phase. Construction is estimated to begin March
1, 2015 and be completed in July, 2015.
2.3 Area Estimates
The entire site area, 0.86 acres will be disturbed and will be referred to as the, “Limit of
disturbance.”
2.4 Runoff Coefficient and Soil Description
On January 6, 2015, Earth Engineering Consultants, LLC completed the geotechnical and
groundwater investigations for the project site and presented the results of this work in the
Geotechnnical Subsurface Exploration Report Lot 17 Midpoint Development, report
#1142088B. According to this report, site soils consist of brown clayey sand underlain by
poorly graded sands and gravels.
According to the NRCS Web Soil Survey maps, the majority of the site consists of:
Name Soil Type Erosion
Caruso Clay Loam, 0 to 1 Percent Slope D Light
The soil erosion potential for this soil type D is light.
2.5 Existing Vegetation
The existing site consists of overlot grading/reseeding which has led to growth of natural
long grasses. 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
According to Earth Engineering Consultants, LLC, groundwater was encountered at the
time of drilling at depths of approximately 9 to 10 feet below existing grades. 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 unit roofs, the asphalt drive aisle and the concrete sidewalks.
To mitigate these DCIA’s, the roofs have been designed to drain into a swale on the west
side, directly into pervious pavers on the east side and into the southwest detention pond
on the south side. Additionally, the asphalt drive aisle and concrete sidewalk has been
designed to drain through permeable pavement (pavers) and sub-drain into the proposed
rain garden/detention pond 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
The site discharges to the existing streets and is carried southeast on Midpoint Drive until
it reaches the inlet at the northeast corner of Midpoint Drive and Sharp Point Drive. The
flows is eventually carried via storm pipe to the Poudre River, approximately 0.24 miles.
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.
Soft Pans is a permanent Low Impact Development (LID) BMP landscaped channel,
constructed generally below grade to convey runoff or channel water to a desired
location. The soft pan areas allow for infiltration to occur as well as including a flow
path across a vegetated surface slowing the conveyance rate of stormwater runoff.
These areas are shown on the landscape plans for the site.
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 Vogel Concrete facility 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 areas where soft pans are located for stormwater conveyance. The
soft bottom/overbank and bioretention media areas allow for infiltration to occur as well as
including a flow path across a vegetated surface, slowing the conveyance rate of stormwater runoff.
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
Geotechnical subsurface Exploration Report, Lot 17 Midpoint Development #1142088B, Earth
Engineering Consultants, LLC, Windsor Colorado, January 6, 2015.
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: 0.89
EROSION CONTROL BMPs Units
Estimated
Quantity
Unit
Price
Total
Price
L.F. 718 $2.50 $1,795.00
Ea. 8 $150.00 $1,200.00
Ea. 1 $928.00 $928.00
Ea. 1 $1,750.00 $1,750.00
Sub-Total: $5,673.00
1.5 x Sub-Total: $8,509.50
Amount of security: $8,509.50
Total Acres x Price/acre: $970.10
$1,090.00 Sub-Total: $970.10
1.5 x Sub-Total: $1,455.15
Amount to Re-seed: $1,455.15
Minimum escrow amount: $3,000.00
Erosion Control Escrow: $8,509.50
Miniumum Escrow Amount
Vogel Concrete: 2600 Midpoint Drive, Fort Collins
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
Concrete Washout Area
(add all other BMPs for the site in this list)
Final Escrow Amount
Erosion and Sediment Control Escrow/Security Calculation
for The City of Fort Collins
BMP Amount
Silt Fence
Vehical Tracking Pad
Reseeding Amount
1/16/2015 4:39 PM T:\Projects\7000 Commercial\7025 SPD Associates\7025-001_002\002 Vogel\SWMP\SWPM Escrow
(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
LIGHTFIELD ENTERPRISES, INC
2600 MIDPOINT DRIVE
FORT COLLINS, CO
C7.6
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.
LIGHTFIELD ENTERPRISES, INC
2600 MIDPOINT DRIVE
FORT COLLINS, CO
EROSION CONTROL PLAN
00 10' 20' 40'
1"=20'
C6.0
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