HomeMy WebLinkAboutBLOOM FILING FOUR - FDP240001 - SUBMITTAL DOCUMENTS - ROUND 1 - STORMWATER MANAGEMENT PLAN
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Stormwater Management Plan
(Erosion Control Report)
Bloom Multi-Family
Fort Collins, CO
Prepared for:
Hartford Acquisitions, LLC
4801 Goodman Road
Timnath, CO 80547
1/23/2024
SWMP
Bloom Multi-family
Fort Collins, CO
i C22026 - Bloom Multi Family Erosion Control Report FDP 1st Round.docx
January 23, 2024
Mr. Wes Lamarque
City of Fort Collins Engineer
4750 Signal Tree Drive
Timnath, CO 80547
RE: The Bloom Mult-Family Stormwater Management Plan (SWMP)
Project Number: C21029
To whom it May Concern:
CivilWorx, LLC is pleased to submit this Stormwater Management Plan (SWMP) for Bloom Mult-Family in
Fort Collins, Colorado. This report is intended to outline the best management practices (BMPs) to be
implemented with the proposed construction. The BMPS are a necessary part of the project, in order to
minimize potential pollutants in stormwater discharges. Note the report requires additional information
from the selected contractor and their construction plan administrator that are not available at this time.
We have prepared this report to accompany the Colorado Department of Public Health and Environment
General Permit for Stormwater Discharges Associated with Construction Activity. and the City of Fort
Collins Storm Drainage Design Criteria.
Please note that this document is intended to be a “living” document which should be modified and
updated through the course of site construction to accurately reflect site conditions at all times. Pollutant
sources should be continuously evaluated, BMP’s 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 Construction Site Operator and/or the permit
holder (or applicant thereof) to ensure the plan is properly maintained and followed.
The Construction Site Operator or SWMP Administrator for this project is: _____________________
and can be contacted at:
Address: ________________________________
Phone: ________________________________
If you should have any questions or comments as you review this report, please feel free to contact me.
Respectfully,
Kelly Hafner, PE ,
Senior Project Manager
CivilWorx, LLC
SWMP
Bloom Multi-family
Fort Collins, CO
ii C22026 - Bloom Multi Family Erosion Control Report FDP 1st Round.docx
TABLE OF CONTENTS
PAGE
I. Introduction .......................................................................................................................................................... 1
A. SWMP Objectives......................................................................................................................................... 1
II. Site Location and Description ............................................................................................................................... 2
A. Project Location ........................................................................................................................................... 2
B. Description of Property ............................................................................................................................... 2
III. Sediment/Erosion Control .................................................................................................................................... 3
A. Construction Activity Description ................................................................................................................ 4
B. Proposed Sequence for Major Activities ..................................................................................................... 4
C. Important Site Areas and Volumes .............................................................................................................. 5
D. Potential Pollutant Sources ......................................................................................................................... 5
E. Water Quality Treatment and LID Practices ................................................................................................ 7
F. Erosion and Sediment Controls ................................................................................................................... 7
G. Erosion Control Sequencing ....................................................................................................................... 10
H. Materials Handling and Spill Prevention .................................................................................................... 12
I. Other Controls ........................................................................................................................................... 13
J. Final Stabilization and Long-term Stormwater Quality.............................................................................. 14
K. Inspection and Maintenance Procedures .................................................................................................. 14
IV. References ......................................................................................................................................................... 15
List of Tables and FIgures
Figure 1. Vicinity Map .................................................................................................................................................... 2
Table 5. Phasing and Earthwork .................................................................................................................................... 5
APPENDICES
APPENDIX A – SWMP Maps, Plans, and Details
APPENDIX B – State of Colorado Permit
APPENDIX C – Stormwater Management Plan Inspection Reports
APPENDIX D – Contractor Inserts (as needed)
APPENDIX E – Escrow Computations
SWMP
Bloom Multi-family
Fort Collins, CO
1 C22026 - Bloom Multi Family Erosion Control Report FDP 1st Round.docx
I. Introduction
A. SWMP Objectives
The objective of this Stormwater Management Plan (SWMP) for Bloom Mult-Family, is to identify the Best
Management Practices (BMP’s) which, when implemented, will meet the requirements of the Colorado
Department of Public Health & Environment, Water Quality Control Division. According to Appendix A of
the State of Colorado General Permit Application and Stormwater Management Plan Guidance for
Stormwater Discharges Associated with Construction Activity (2019) and the City of Fort Collins Storm
Drainage Design Criteria, the SWMP goal is to, “describe appropriate controls and measures to improve
water quality by reducing pollutants in storm water discharges and ensure compliance with the
requirements of the storm water permit. 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 to accurately reflect site conditions at all times. Pollutant sources should be continuously
evaluated, BMP’s selected, documented, implemented, and pollutant sources 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.
SWMP
Bloom Multi-family
Fort Collins, CO
2 C22026 - Bloom Multi Family Erosion Control Report FDP 1st Round.docx
II. Site Location and Description
A. Project Location
The Bloom Development (referred herein as “the site”) is located north of State Highway 14 (Mulberry
Street) and just west of Interstate 25. The site is located within the southwest half of Section 9, Township
7 North, Range 68 West of the 6th Principal Meridian in the City of Fort Collins, County of Larimer, State of
Colorado. The site is located on the parcel of land # 8709300004 with coordinates of 40.587086, -
105.016334. A vicinity map is shown with Figure 1.
Figure 1. Vicinity Map
B. Description of Property
SWMP
Bloom Multi-family
Fort Collins, CO
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Currently, the property is undeveloped. There are no structures or significant infrastructure located on
the site. The current use of the property is agriculture and farming and thus the existing land can be
characterized as a tilled field. Below is a detailed summary of the existing conditions:
Ground Cover - The site is currently being used as crop land and therefore ground conditions can
be characterized as tillage/field with varying seasonal crops.
Grades – In general, the entire site drains to the south. These grades are generally less than 1%,
with a few localized areas that slope at approximately 2%.
Soil Type - According to the Natural Resources Conservation (NRCS) web soil survey and report, the
site consists of Garret loam and Ascalon sandy loam soils of hydrologic soils groups Type B and C.
Utilities – The site does not have an existing utilities on it its property. Domestic water, sanitary
sewer, and storm water utilities have been designed and are planned to be built under roads that
will abut the property. Natural gas, telephone, fiber, and electric are planned to be installed in
and around the site at a future time.
Storm Drainage / Irrigation Facilities – The site does not contain any storm drainage infrastructure
except for surface drainage. No irrigation facilities are present on the site.
The project site is located within the Cooper Slough Drainage Basin as shown Figure 2 above. The proposed
site area consists of approximately 15.8 acres. Four (4) proposed roads that will be constructed as part of
the Bloom 1st Filing Project and shown in the construction plans by Galloway engineering surround the
site property - Aria way on the west, Greenfields Drive on the east, International Boulevard to the north,
and Donella Drive to the south. The entire site drains to the south but the site is generally flat. The site
has localized areas that have grades of approximately 2%, but most grades are less than 1%. The nearest
receiving waters to the site are the Cooper slough drainage and wetlands (approximately 1,200 feet from
the site) that flow into the Boxelder Creek, which further transports water to the Poudre River.
The developed Bloom project site area includes the construction of multi-family homes, parking areas,
landscaped areas and access roads. The Bloom multi-family subdivision project is part of the Cooper
Slough Basin whose ultimate outfall is the Boxelder Creek, located south of Colorado Highway 14
(Mulberry Street). Runoff from the Bloom-multifamily site will be captured using a combination of curb &
gutter and storm sewer pipe and conveyed to a proposed onsite detention facility. To address water
quality, a chambered underground detention facility is also included with the project. The proposed
detention pond will also include flows from adjacent property to the east, west and north as shown on
the Mulberry and Greenfields Master Drainage Plan by Galloway Engineering. Storm sewer stubouts are
connecting to the proposed detention pond for connection with this project.
III. Sediment/Erosion Control
The SWMP will be required to be updated by the Contractor at the time of development. The construction
plans for the Bloom Mult-Family development will also be updated to include the SWMP administrator
and contact information before construction begins.
SWMP
Bloom Multi-family
Fort Collins, CO
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The general construction activities and BMP implementation is outlined as follows:
A. Construction Activity Description
Construction activity (for all phases of construction) includes installation of BMP’s. Three primary phases
of construction include an initial clearing and grubbing, demolition, and overlot grading phase. This phase
will be followed by a utility and core (street) infrastructure phase. This will be followed with a stabilization
phase and building construction phase.
B. Proposed Sequence for Major Activities
Construction of the proposed Bloom site will take place over 2 phases (see Erosion Control/Phasing Map
in Appendix A). For both phases, initial construction activities will begin with clearing and grubbing as well
as topsoil removal and stockpiling. After the site has been cleared of existing vegetation and topsoil,
grading of phase 1 will begin, which will include the installation of temporary erosion control measures.
Once phase 1 has been graded, the proposed utilities will be installed. Proposed utilities will include the
installation of underground storm sewer systems (including pipe, manholes, inlets and water quality
control features and systems), sanitary sewer mains and services and water/fire line mains and services.
Following the completion of utility installation subgrade preparation will occur and installation of
hardscape areas will occur. Concrete curb and gutter as well as sidewalks will be installed followed by
paving of the parking areas and access roads. This process will take place in the same order for phase 2.
After infrastructure improvements are complete, all remaining disturbed areas of the site will be re-
seeded to minimize any erosion potential as well as to help eliminate the transport of sediment or
pollutants located on the property. Listed below, are the major aspects of construction in the anticipated
order for each phase of the project:
1.) Initial Erosion Control Measures Installed.
2.) Clearing and grubbing of the site.
3.) Topsoil removal and stockpile.
4.) Grading – includes grading of the proposed detention pond located on the southeast portion of
the site.
5.) Install additional erosion control measures for detention pond, maintenance of existing control
measures.
6.) Installation of utilities – open trenching and installation of proposed utility pipelines and
structures/junctions for storm sewer, sanitary sewer and water infrastructure located on the
site.
7.) Install additional erosion control measures for storm sewer facilities, maintenance of existing
control measures.
8.) Subgrade preparation / final grading of the site in preparation for building pads, and hard
surfaces.
9.) Installation of concrete curb and gutter, drainage pans, sidewalks, miscellaneous concrete pads
and walkways, asphalt paving, and building pads.
10.) Install additional erosion control measures based on these hard surface improvements and
changes in drainage paths, maintenance of existing control measures.
11.) Installation of project lighting as well as required hard surface striping.
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Bloom Multi-family
Fort Collins, CO
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12.) Revegetation efforts and stabilization of remaining disturbed areas on the site begins. Work
will include seeding, mulching, installation of sod, and installation of other natural landscape
features provided in the landscaping plan.
13.) Permanent erosion control measures installed; temporary control measures removed.
14.) Final site cleanup and punch list items addressed.
Infrastructure construction is estimated to begin in the late spring of 2024 and be completed by Summer
2025.
C. Important Site Areas and Volumes
The total area of the project is 15.83 acres which will be divided into two (2) construction phases.
Notable area for each phase and the project total can be seen in the table below.
Table 1. Phasing and Earthwork
Area Staging/Stockpiling
Area (Ac.)
Existing
Imperviousness
(%)
Topsoil
Volume
(CY)
Area of
Disturbance
(Ac.)
Net adjusted,
required import of
materials with
15% compaction
factor (CY)
Phase 1 11.78 0.50 2 6,350 11.78 105,000
Phase 2 4.05 Will be provided at
final submittal
2 2,200 4.05 50,000
Total 15.83 Will be provided at
final submittal
2 7,550 15.83 155,000
D. Potential Pollutant Sources
Listed below are potential pollutant sources that are expected on the site as well as means and methods
to contain and eliminate chances of these sources to be transported off site and to downstream
receiving waters.
1.) Disturbed and Stockpiled Topsoil:
Stockpiled soils generated from grading and utility excavation as well as topsoil stockpiles
will be stored in designated areas for each phase of the project. These stockpile piles shall
not exceed 10 feet in height and shall be located at minimum 50’ away from any proposed
or existing storm inlets or from the proposed-on site detention pond. If these stockpiled soil
piles are anticipated to remain for greater than 30 days, they shall be temporarily seeded.
Silt fence or straw waddles shall be installed around the perimeter of the stockpiles in order
to prevent rainfall events from transporting sediment away from the stockpiles. Disturbed
areas of the site shall be surface roughened to prevent heavy erosion. Locations for
proposed staging / stockpiling areas can be found in Appendix C as part of the interim
erosion control plan.
2.) Vehicle tracking of sediments:
SWMP
Bloom Multi-family
Fort Collins, CO
6 C22026 - Bloom Multi Family Erosion Control Report FDP 1st Round.docx
It is anticipated that the contractor will access the property from Lions Gate Drive. A Vehicle
tracking control pad will be required at this access location onsite during construction to
reduce tracking sediment onto the adjacent streets.
At the end of each workday, the Contractor shall sweep or scrape Lions Gate Drive of sediment
that may have accumulated during the workday.
3.) Management of contaminated soils:
There are not any known contaminated soils on the site. However, if the contractor encounters
contaminated soils during the construction process, they should stop construction immediately
and notify the appropriate government authorities in accordance with good construction safety
and practice.
4.) Loading and Unloading operations:
Loading and unloading will take place on the site. Truck access should be limited to the extent
possible to locations within the disturbed limits of the project. BMP’s such as silt fence in non-
paved areas and rock socks in paved areas should be placed to keep sediment from exiting the
disturbed area limits, primarily towards the East as this is the low side of the site.
5.) Outdoor storage activities (building materials, fertilizers, chemicals, etc.):
Storage of onsite materials including building materials, fertilizers, waterline, 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 or onsite within an area
surrounded by silt fence or straw wattles. Vehicle and equipment maintenance shall not happen
along the adjacent public streets. At a minimum, all vehicle and equipment maintenance shall be
performed on the hard surface or gravel areas at least 50’ from any stormwater feature (i.e. inlet,
storm sewer, concentrated runoff, swale, etc.)
7.) Significant dust or particulate generating processes:
The Contractor shall comply with applicable air pollution control requirements of the Town of
Winter Park. The Contractor shall take appropriate actions to minimize atmospheric pollution and
take reasonable precautions which shall 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, always 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 watertight containers and covered
as necessary and stored in a bermed area, a storage building, or within a vehicle to act as
secondary containment.
SWMP
Bloom Multi-family
Fort Collins, CO
7 C22026 - Bloom Multi Family Erosion Control Report FDP 1st Round.docx
9.) On-site waste management practices (waste piles, liquid wastes, dumpsters, etc.);
1. Waste piles should be covered or surrounded by silt fence or straw wattles. Liquid wastes
should be collected and stored in covered containers and disposed of properly.
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.
13.) Saw cutting and Grinding:
Cutting of pavement or concrete and milling of asphalt is expected to occur during the
project for tie in locations of proposed access roads and utilities. These are not on the
project property and will be part of city ROW. Nevertheless, water suppression shall be
used to reduce transport of dust during operations. Loose material shall be removed and
disposed of off-site at a proper facility.
14.) Non-Storm Water Discharge:
Other non-storm water components of discharge include, but are not limited to, water line
flushing, irrigation to establish seeding. It is important for the contractor to manage the runoff
from these items utilizing the BMP’s mentioned in this report (i.e. silt fence, straw waddles,
concrete washout areas, surface roughening, etc.).
E. Water Quality Treatment and LID Practices
Water quality for the site will be included with an underground chamber infiltration system and detention
area water quality capture volume for other areas not tributary to the chamber system. The inclusion of
these two approaches is presented as a long-term viable water quality/ LID design for the project.
F. 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
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Fort Collins, CO
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before upslope land disturbance takes place. The BMP’s will be installed as shown on the SWMP Map
shown in Appendix A. They must be supplemented as on-site experience proves necessary in order to
control sediment, pollutant discharge, and ensure 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 Control Measures (BMPs)
• Inlet Protection is a temporary BMP that 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:
• Regular Meetings are a temporary and non-structural BMP. 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.
• Silt Fence is a woven synthetic permeable fabric that filters runoff. Silt fence is a temporary
barrier that 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.
• Staging Areas will be provided during the construction process at least 100’ from any storm
water 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.
• Straw Wattles are a temporary BMP that are used for a variety of purposes. They are used for
inlet protection, curbside check dams, swale protection, at the bottom of slopes, or the limits of
property boundaries. They are easy to install and are increasingly being used for Small Site
SWMP’s. The straw wattles, which are meshed netting “tubes,” filled with straw, excelsior, or
coconut fiber. Wattles for swale protection should be installed following rough grading of
channel areas. Wattles require proper installation and maintenance to ensure their
performance.
• Rock Socks are a temporary BMP that are used for a variety of purposes. They are used for inlet
protection, curbside check dams, or at the limits of property boundaries. Rock socks are wire
meshed “tubes” filled with rocks. Rock Socks require proper installation and maintenance to
ensure their performance.
• Check Dams are a temporary BMP that are used as grade control structures in drainage channels
to limit the erosive nature of stormwater by reducing flow velocity. Check dams are typically
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Fort Collins, CO
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constructed from rock or gravel. Check dams require proper installation and maintenance to
ensure their performance.
• Street Sweeping and Vacuuming removes sediment that has been tracked onto roadways to
reduce sediment transport into storm drain systems or a surface waterway. This practice should
be used on the adjacent paved road to the construction site. Paved roads should be inspected
on a daily basis and more frequently as needed.
• 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.
• Surface Roughening is provided following grading activities to slow the effects of wind erosion.
Roughening can be used as a temporary BMP and is a technique used for creating unevenness
on bare soil through the construction of furrows (groove cuts) running across a slope or by
utilization of construction equipment to track the soil surface. The primary function of surface
roughening is to reduce erosion potential by decreasing runoff velocities, reducing the length of
sheet flow trapping sediment, and increasing infiltration of water into the soil.
• 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. The
seed mix 100% smooth brome at a minimum application rate of 30 pls/lbs/acre. Fertilizer and
Mulch shall be included as specified on the plans.
• Temporary Erosion Control Fabric is comprised of a temporary degradable erosion control
blanket designed to provide immediate erosion protection and vegetation establishment
assistance on moderate slopes and low to medium-flow channels where bare-ground seeding
and loose mulches often fail. Temporary erosion control blankets are being recommended
moderate slopes that do not require permanent turf reinforcement matting.
• Vehicle Tracking Control 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 are installed prior to
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 will also be used on this site at any
stockpile area exits.
• Wattle Sediment Protection is a temporary BMP that are typically used as check structures in
areas of concentrated water flow such as swales, grassed waterways, and down drains. They
can be installed in combination with any type of rolled erosion control blanket or channel liner
and function by slowing water velocity, settling out sediment, and preventing undermining of
the channel lining material. Wattles for swale protection should be installed following rough
grading of channel areas. Sizing and spacing shall be per manufacturer’s recommendation.
• 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
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Fort Collins, CO
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of final grade, and the timely installation of pavement following completion of utility trenching
operations and curb construction. Open areas should be kept in a roughened condition (see
Surface Roughening above).
Permanent Control Measures (BMPs)
• Grass-Lined Swales (included as part of permanent seeding or other permanently stabilized
swales) are 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 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. The site
specific re-vegetative seed mix is listed in the table below. Sow seeds at 2-3 lbs, per 1,000
square feet. The application method is hand broadcast spreading and rake in mechanically or by
hand. Slopes over 3:1 should be hayed and tackified or netted with biodegrabale erosion
blankets. Soil Amendments shall be incorporated in all landscape areas to a depth of 6” at a rate
of 3 cubic yards per 1000 square feet of area unless 4” of loose topsoil have been imported onto
the site over 4” of loosened subgrade soils. Permanent Landscaping 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 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 is to be cleared.
• Storm Sewer Outlet Protection devices are 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. Turf reinforcement matting 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.
G. Erosion Control Sequencing
This project will have three distinct erosion control phases. The initial phase will be installing
erosion control items prior to any construction on the site. After the initial erosion control items
have been installed, the next phase will consist of site demolition, grading activities and construction
of the infrastructure (utilities, storm sewer, and development of landscaped areas). The final stage
will include the construction of the site hard surfaces including roads, parking areas, curb and gutter,
concrete sidewalk and island areas and finally ending in stabilization of all remaining disturbed areas
of the site. Each of the phases is described below, including necessary erosion control items.
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Bloom Multi-family
Fort Collins, CO
11 C22026 - Bloom Multi Family Erosion Control Report FDP 1st Round.docx
A SWMP drawing is located in the Appendix that includes the minimum required BMP’s found on
the Sediment and Erosion Control Plans. It should be filled in with the appropriate BMP’s as they
are constructed/placed within the project site.
Sequence 1 – Initial, Prior to Construction
• Silt Fence – Before construction commencement, silt fence will be placed
downstream of areas where runoff from construction activities is expected to occur.
• Staging Area – A concrete wash out area, fueling area, and other staging areas will
be provided during the construction process at least 100’ from any storm water
conveyance. A staging area is to be shown on the SWMP drawing when its location
is identified.
• Vehicle Tracking Control – Before commencement of construction, vehicle tracking
control shall be placed at the location shown west of Overland Trail along West
Elizabeth Street. Any other points of ingress and egress planned by the contractor
and approved by the owner shall also receive suitable vehicle tracking control
BMP's.
• Construction Fence – Before commencement of construction, construction fence
shall be placed at the contractor’s discretion (or as shown in the plans) to limit
access by construction equipment and personal vehicles to designated areas of
ingress and egress.
• Stage/stockpiles – Designate stockpile/staging location per erosion control initial
sequence map included in appendix A. Strip topsoil and store at this location and be
sure to surround the stockpile (s) with silt fence or straw wattles.
Sequence 2 – Site Demolition, Site Grading, and Infrastructure Construction
The items installed in sequence 1 shall be in place, functional, and maintained during
and following the site demolition and site grading operations. In addition to those
items, the following BMP’s shall be installed.
• Wind Borne Sediment and Dust Control – Wind borne sediment and dust control
measures should be implemented during grading activities. This will be particularly
important to consider prior to the establishment of seeding.
• Inlet Protection – Wattles will be placed at curb inlets and area inlets located
throughout the site immediately after the inlet is constructed / installed. Existing
inlets shall be protected prior to heavy equipment staging, demolition, or
commencement of construction activities.
• Swale Protection – Straw wattles and check dams will be placed within the swales
immediately following rough grading. Wattles and check dams shall be placed
across the swale for every 2’ of drop in swale elevation or every 300'.
SWMP
Bloom Multi-family
Fort Collins, CO
12 C22026 - Bloom Multi Family Erosion Control Report FDP 1st Round.docx
• Slope Protection – Surface roughening and contour furrows shall occur after rough
grading.
• Temporary Seeding – The majority of the landscaped areas will be permanently
seeded or planted. However, if disturbed areas are left without permanent
stabilization 30 days after grading, temporary seeding will be required.
• Outlet Protection– Riprap and/or permanent turf reinforcement matting will be
placed immediately downstream of storm sewer outfalls.
• Concrete Washout Area – Concrete washout areas will be placed prior to, and
maintained during, the completion of concrete work.
• Inlet Protection – Wattles will be placed at curb inlets and area inlets located
throughout the site immediately after the inlet is constructed / installed. Existing
inlets shall be protected prior to heavy equipment staging, demolition, or
commencement of construction activities.
• Rock Socks – Rock socks will be placed to replace other inlet protection devices as
required after paving operations have been completed.
Sequence 3 - Building and roadway construction
This sequence will likely begin before the seeding has been established throughout the
site, so it is expected that majority of the BMP’s shown in Phase 1 and Phase 2 will be in
place at the beginning of this phase. As roads are paved and seeding is established
there will be previously placed BMP's such as vehicle tracking control devices and some
sections of silt fence that may be removed. There are other items such as inlet
protection, silt fence, and swale protection that may only be removed after all
construction is complete and upstream areas are established.
• Permanent Seeding – Permanent seeding or landscaping shall be placed
immediately in areas that are final graded and where little future disturbance is
expected.
• Rock Socks – Rock socks will be placed to replace other inlet protection devices as
required after paving operations have been completed.
H. Materials Handling and Spill Prevention
The site development includes appropriate construction staging and stockpile areas
identified on the SWMP Plans shown in Appendix A. 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 downstream. The staging/stockpile
area(s) may be moved to a location no closer than 100’ from a storm water conveyance.
Vehicle tracking control should be placed at the stockpile area entrance/exit and silt
fence should surround it. If relocated, the SWMP should be updated with the actual
location of the stockpile/staging area(s).
SWMP
Bloom Multi-family
Fort Collins, CO
13 C22026 - Bloom Multi Family Erosion Control Report FDP 1st Round.docx
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. 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.
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.
Reporting Spills: Any spill or discharge of any pollutant, including but not limited to oil,
paints, fuels, hazardous liquids, sediment, or super-chlorinated water that reaches
storm drains or enters “Waters of the State” must be reported to the CDPHE
Emergency Spill Reporting line at 1-877-518-5608.
If a spill or leak is of a hazardous substance that exceeds 1 pint or is of an unknown
substance of any amount, call 911 and notify the Colorado Department Public Health
and Environment (CDPHE) 24-hour emergency spill notification hotline at 1- 877-518-
5608, immediately. If the spill is more than 25 gallons of a petroleum product from a
regulated storage tank or delivery truck or any amount that causes a sheen on nearby
surface water, it must be reported to the Division of Oil and Public Safety at the
Colorado Department of Labor and Employment within 24 hours at (303) 318-8547 or to
CDPHE Emergency Spill Reporting line at 1-877-518-5608 – if after normal business
hours. If cleanup cannot be accomplished within 24 hours, the Division of Oil and Public
Safety must be notified immediately. For non-emergency spills, call 970-674-2490. Spills
shall also be reported to the onsite supervisor.
I. 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 shall 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
SWMP
Bloom Multi-family
Fort Collins, CO
14 C22026 - Bloom Multi Family Erosion Control Report FDP 1st Round.docx
50 feet from inlets and must be anchored. If sanitary facilities are located on a
paved surface, a secondary containment BMP will need to be constructed.
• Access off paved roads should be limited.
J. 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 BMP’s may be removed, unless they are required to remain in place for
future phasing.
Water quality enhancements are provided with underground chambered detention system. A
more detailed description of these features is outlined in Appendix C.
In areas where grass-lined swales are provided for storm water conveyance. The soft
bottom/overbank 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.
Temporary and Permanent seeding will be implemented on the site as well as other plantings that
will be implemented based off the landscape architectural plan as required by the local
jurisdiction where the site exists (City of Fort Collins).
K. Inspection and 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.
The temporary control measures will be inspected and documented at a minimum of once every
14 days and 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/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.
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
SWMP
Bloom Multi-family
Fort Collins, CO
15 C22026 - Bloom Multi Family Erosion Control Report FDP 1st Round.docx
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 list includes some recommended 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.
IV. References
1. City of Fort Collins Stormwater Criteria Manual, As adopted by the City Council of the City of
Fort Collins, as referenced in Section 26-500 of the Code of the City of Fort Collins, Revised
December 2018.
2. Urban Storm Drainage Criteria Manuals 2 and 3, Urban Drainage and Flood Control District,
Denver, Colorado, November 2010 as currently (Feb 2018) amended.
3. State of Colorado, Stormwater Discharges Associated with Construction Activity, Stormwater
Management Plan Preparation Guides, www.colorado.com.
SWMP
Bloom Multi-family
Fort Collins, CO
A C22026 - Bloom Multi Family Erosion Control Report FDP 1st Round.docx
APPENDIX A
SWMP Maps, Plans, Details
• EC01-EC03 – Drainage and Erosion Control Plan
•
IP
SFSFSF
SF
SF
SF
SF
SFVTC
A
SF
VTC
PROJECT LIMITS OF DISTURBANCE
PHASE 1: 12.78 ACRES
PHASE 2: 3.72 ACRES
TOTAL: 16.50 ACRES
CWA
RS
A
A
ER
O
S
I
O
N
C
O
N
T
R
O
L
P
L
A
N
-
I
N
I
T
I
A
L
1" = 60'
1" = 60'
17
EC01
PR
E
P
A
R
E
D
F
O
R
:
JOB NUMBER
SHEET NUMBER
SHEETSOF
DA
T
E
S
U
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M
I
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E
D
:
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CAUTION
RE
V
I
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I
O
N
S
:
VERTICAL:
HORIZONTAL:
SCALE
4025 Automation Way
Suite B2
Fort Collins, CO 80525
(970) 698-6046
CivilWorxeng.com
BL
O
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M
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C22026
HA
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T
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08
/
0
1
/
2
0
2
3
42
PRELIMINARY
NOT FOR
CONSTRUCTION
POTTER DRIVE (PRIVATE STREET)
BELLAMY LANE (PRIVATE STREET)
00 60'120'
SCALE: 1" = 60'
30'
PHASE 2
TOTAL PROJECT
DISTURBED AREA 16.50 ACRES
TOTAL "ONSITE" AREA
OF DISTURBANCE 15.91 ACRES
TOTAL "OFFSITE" AREA
OF DISTURBANCE 0.59 ACRES
TOTAL
STORAGE/STAGING
AREA
0.5000 ACRES
TOTAL HAUL ROADS
AREA N/A
CONSTRUCTION
VEHICLE TRAFFIC AREA N/A
ESTIMATED PERCENT
OF PROJECT AREA
EXPOSED
100%
ESTIMATED PERCENT
VEGETATIVE COVER ~95%DENSITY
EXISTING SOIL TYPE TYPE B & C SANDY/LOAM
GROUNDWATER DEPTH FEET
NUMBER OF PHASES
W/PROJECT 2
TOTAL VOUME OF
IMPORTED (+) /
EXPORTED (-)
MATERIALS
(+) 155,000 CUBIC YARDS
TOTAL AREA OF
STOCKPILING OF FILL
OR BORROW AREAS OFF
SITE
SQUARE FEET
STEEPEST SLOPE 4 H:V
DISTANCE FROM A
RIPARIAN AREA OF
SENSITIVE AREA
1,200 FEET
KEYMAP
NTS
LEGEND
MAPPING / SITE
PROPERTY BOUNDARY
RIGHT-OF-WAY
LOT LINES
CENTER LINE
CURB AND GUTTER
PHASING LINE
EROSION CONTROL
VEHICLE TRACKING
CONTROL PAD
WATTLE DIKE
TEMPORARY SEDIMENT
INLET PROTECTION
TURF REINFORCEMENT MAT
SILT FENCE
STOCKPILE MANAGEMENT
SURFACE ROUGHENING
CONCRETE WASHOUT
STRUCTURE
PERMANENT SEEDING
SILT FENCE TO BE REMOVED
PERIMETER PROTECTION
DURING BUILDING
CONSTRUCTION
NOTES
1.THE CONTRACTOR IS RESPONSIBLE FOR
VERIFYING THE FIELD CONDITIONS ARE AS
SHOWN IN THE DRAWINGS. IF THE
CONTRACTOR FINDS DISCREPANCIES THE
CONTRACTOR SHALL CONTACT THE
ENGINEER.
2.ALL DISTURBED AREAS SHALL BE
REVEGETATED.
3.EROSION CONTROL PRACTICES, SITE
PROTECTION, AND REVEGETATION
METHODS SHALL FOLLOW CITY
REGULATIONS.
4.IN ADDITION TO THE EROSION CONTROL
MEASURES SHOWN ON THIS DRAWING, THE
CONTRACTOR SHALL COMPLETE,
COORDINATE WITH, AND UPDATE AS
REQUIRED, THE STORMWATER POLLUTION
PREVENTION PLAN (SWPP) FOR THIS
PROJECT.
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 AS
APPROVED BY ENGINEER. TYPICAL ALL
SLOPES, REPEAT AS NECESSARY UNTIL
LANDSCAPING IS INSTALLED.
6.ANY AREAS USED FOR STOCKPILING
AND/OR STAGING SHOULD ALSO HAVE
SEDIMENT AND EROSION CONTROL
MEASURES AS NECESSARY. THESE AREAS
SHOULD BE LOCATED AT LEAST 100' AWAY
FROM DRAINAGE WAYS. THE SWMP
SHOULD BE UPDATED TO SHOW THESE
AREAS AND SEDIMENT AND EROSION
CONTROL ITEMS. THE ITEMS MAY INCLUDE
BUT ARE NOT LIMITED TO VEHICLE
TRACKING CONTROL, SILT FENCE,
CONSTRUCTION FENCE, CONCRETE
WASHOUT, AND SEDIMENT TRAP.
7.TEMPORARY SEEDING OR TACKIFER
PLACEMENT SHALL BE UTILIZED IN THE
EVENT THAT A GRADED AREA IS EXPOSED
LONGER THAN 14 DAYS WITH NO
CONSTRUCTION ACTIVITY.
8.TURF REINFORCEMENT MAT SHALL BE
PYRAMAT OR APPROVED EQUAL.
9.CONTRACTOR SHALL REMOVE ALL
SEDIMENT, MUD, CONSTRUCTION DEBRIS,
OR OTHER POTENTIAL POLLUTANTS THAT
MAY HAVE BEEN DISCHARGED TO OR,
ACCUMULATE IN, THE FLOW LINES AND
PUBLIC RIGHTS-OF-WAY OF THE CITY, AS A
RESULT OF CONSTRUCTION ACTIVITIES
ASSOCIATED WITH THIS DEVELOPMENT OR
CONSTRUCTION PROJECT. SAID REMOVAL
SHALL BE CONDUCTED DAILY, AS MAY BE
REQUIRED. SUCH MATERIALS SHALL BE
PREVENTED FROM ENTERING THE STORM
SEWER.
10.THE PROJECT LANDSCAPE PLAN WILL
CONTAIN THE DETAILED INFORMATION
REGARDING REQUIRED SEED TYPES/MIXES.
11.SEE THE GENERAL NOTES SHEETS FOR ALL
OF THE CITY OF FORT COLLINS EROSION
CONTROL NOTES.
VTC
WD
TS
IP
TRM
SF
LIMITS OF DISTURBANCE
RIP RAP
FLOW DIRECTION
SF
SRSR
CWA
PSPS
A
B
BBBB
B B
B
B
PHASE 1
PHASE 1 STOCKPILE
Implementation Timeline: Initial Overlot Grading Prior to Utility Construction
PO
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(
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BE
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(
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)
IP
IP
IP
IP
IP
IP
SFSFSF
SF
SF
A
SF
SFVTC
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4.8:1
4.1:1
4.
0
:
1
5
.
2
:
1
7.6:1
4.
7
:
1
5.2:
1
5.5:1
4.8
:
1
6.
0
:
1
SF
SF
VTC
SR
SR
SR
SR
SR
SR
PROJECT LIMITS OF DISTURBANCE
PHASE 1: 12.78 ACRES
PHASE 2: 3.72 ACRES
TOTAL: 16.50 ACRES
CWA
WD
WDWD
WD
WD
WD
WD
WD WDWD
WD
WD
WD
WD
WD
WD WD
WD
WD
WD
WD
WD
WD
WD
WD
WD
WD
WD
WD
WDWD
WD
WD
WD
SR SR
SR SR
SRSRSR SR
SR
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IP
A
WDIP
WD
IP
WD
WD
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-
I
N
T
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R
I
M
1" = 60'
1" = 60'
18
EC02
PR
E
P
A
R
E
D
F
O
R
:
JOB NUMBER
SHEET NUMBER
SHEETSOF
DA
T
E
S
U
B
M
I
T
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E
D
:
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.
NO
.
BY
DA
T
E
CAUTION
RE
V
I
S
I
O
N
S
:
VERTICAL:
HORIZONTAL:
SCALE
4025 Automation Way
Suite B2
Fort Collins, CO 80525
(970) 698-6046
CivilWorxeng.com
BL
O
O
M
M
U
L
T
I
-
F
A
M
I
L
Y
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L
O
P
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C22026
HA
R
T
F
O
R
D
H
O
M
E
S
08
/
0
1
/
2
0
2
3
42
PRELIMINARY
NOT FOR
CONSTRUCTION
POTTER DRIVE (PRIVATE STREET)
BELLAMY LANE (PRIVATE STREET)
00 60'120'
SCALE: 1" = 60'
30'
PHASE 2
TOTAL PROJECT DISTURBED AREA 16.50 ACRES
TOTAL "ONSITE" AREA OF
DISTURBANCE 15.91 ACRES
TOTAL "OFFSITE" AREA OF
DISTURBANCE 0.59 ACRES
TOTAL STORAGE/STAGING AREA 0.5000 ACRES
TOTAL HAUL ROADS AREA N/A
CONSTRUCTION VEHICLE TRAFFIC
AREA N/A
ESTIMATED PERCENT OF PROJECT
AREA EXPOSED 100%
ESTIMATED PERCENT VEGETATIVE
COVER ~95%DENSITY
EXISTING SOIL TYPE TYPE B & C SANDY/LOAM
GROUNDWATER DEPTH FEET
NUMBER OF PHASES W/PROJECT 2
TOTAL VOUME OF IMPORTED (+) /
EXPORTED (-) MATERIALS (+) 155,000 CUBIC YARDS
TOTAL AREA OF STOCKPILING OF FILL
OR BORROW AREAS OFF SITE SQUARE FEET
STEEPEST SLOPE 4 H:V
DISTANCE FROM A RIPARIAN AREA OF
SENSITIVE AREA 1,200 FEET
KEYMAP
NTS
LEGEND
MAPPING / SITE
PROPERTY BOUNDARY
RIGHT-OF-WAY
LOT LINES
CENTER LINE
CURB AND GUTTER
PHASING LINE
EROSION CONTROL
VEHICLE TRACKING
CONTROL PAD
WATTLE DIKE
TEMPORARY SEDIMENT
INLET PROTECTION
TURF REINFORCEMENT MAT
SILT FENCE
STOCKPILE MANAGEMENT
SURFACE ROUGHENING
CONCRETE WASHOUT
STRUCTURE
PERMANENT SEEDING
SILT FENCE TO BE REMOVED
PERIMETER PROTECTION
DURING BUILDING
CONSTRUCTION
NOTES
1.THE CONTRACTOR IS RESPONSIBLE FOR
VERIFYING THE FIELD CONDITIONS ARE AS
SHOWN IN THE DRAWINGS. IF THE
CONTRACTOR FINDS DISCREPANCIES THE
CONTRACTOR SHALL CONTACT THE
ENGINEER.
2.ALL DISTURBED AREAS SHALL BE
REVEGETATED.
3.EROSION CONTROL PRACTICES, SITE
PROTECTION, AND REVEGETATION
METHODS SHALL FOLLOW CITY
REGULATIONS.
4.IN ADDITION TO THE EROSION CONTROL
MEASURES SHOWN ON THIS DRAWING, THE
CONTRACTOR SHALL COMPLETE,
COORDINATE WITH, AND UPDATE AS
REQUIRED, THE STORMWATER POLLUTION
PREVENTION PLAN (SWPP) FOR THIS
PROJECT.
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 AS
APPROVED BY ENGINEER. TYPICAL ALL
SLOPES, REPEAT AS NECESSARY UNTIL
LANDSCAPING IS INSTALLED.
6.ANY AREAS USED FOR STOCKPILING
AND/OR STAGING SHOULD ALSO HAVE
SEDIMENT AND EROSION CONTROL
MEASURES AS NECESSARY. THESE AREAS
SHOULD BE LOCATED AT LEAST 100' AWAY
FROM DRAINAGE WAYS. THE SWMP
SHOULD BE UPDATED TO SHOW THESE
AREAS AND SEDIMENT AND EROSION
CONTROL ITEMS. THE ITEMS MAY INCLUDE
BUT ARE NOT LIMITED TO VEHICLE
TRACKING CONTROL, SILT FENCE,
CONSTRUCTION FENCE, CONCRETE
WASHOUT, AND SEDIMENT TRAP.
7.TEMPORARY SEEDING OR TACKIFER
PLACEMENT SHALL BE UTILIZED IN THE
EVENT THAT A GRADED AREA IS EXPOSED
LONGER THAN 14 DAYS WITH NO
CONSTRUCTION ACTIVITY.
8.TURF REINFORCEMENT MAT SHALL BE
PYRAMAT OR APPROVED EQUAL.
9.CONTRACTOR SHALL REMOVE ALL
SEDIMENT, MUD, CONSTRUCTION DEBRIS,
OR OTHER POTENTIAL POLLUTANTS THAT
MAY HAVE BEEN DISCHARGED TO OR,
ACCUMULATE IN, THE FLOW LINES AND
PUBLIC RIGHTS-OF-WAY OF THE CITY, AS A
RESULT OF CONSTRUCTION ACTIVITIES
ASSOCIATED WITH THIS DEVELOPMENT OR
CONSTRUCTION PROJECT. SAID REMOVAL
SHALL BE CONDUCTED DAILY, AS MAY BE
REQUIRED. SUCH MATERIALS SHALL BE
PREVENTED FROM ENTERING THE STORM
SEWER.
10.THE PROJECT LANDSCAPE PLAN WILL
CONTAIN THE DETAILED INFORMATION
REGARDING REQUIRED SEED TYPES/MIXES.
11.SEE THE GENERAL NOTES SHEETS FOR ALL
OF THE CITY OF FORT COLLINS EROSION
CONTROL NOTES.
VTC
WD
TS
IP
TRM
SF
LIMITS OF DISTURBANCE
RIP RAP
FLOW DIRECTION
SF
SRSR
CWA
PSPS
A
B
BBBB
B B
B
B
PHASE 1
PHASE 1 STOCKPILE
Implementation Timeline: Utility Installation and Building Construction
PO
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1
PROJECT LIMITS OF DISTURBANCE
PHASE 1: 12.78 ACRES
PHASE 2: 3.72 ACRES
TOTAL: 16.50 ACRES
PS
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:
VERTICAL:
HORIZONTAL:
SCALE
4025 Automation Way
Suite B2
Fort Collins, CO 80525
(970) 698-6046
CivilWorxeng.com
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C22026
HA
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3
42
PRELIMINARY
NOT FOR
CONSTRUCTION
POTTER DRIVE (PRIVATE STREET)
BELLAMY LANE (PRIVATE STREET)
00 60'120'
SCALE: 1" = 60'
30'
PHASE 2
TOTAL PROJECT
DISTURBED AREA 16.50 ACRES
TOTAL "ONSITE" AREA
OF DISTURBANCE 15.91 ACRES
TOTAL "OFFSITE" AREA
OF DISTURBANCE 0.59 ACRES
TOTAL
STORAGE/STAGING
AREA
0.5000 ACRES
TOTAL HAUL ROADS
AREA N/A
CONSTRUCTION
VEHICLE TRAFFIC AREA N/A
ESTIMATED PERCENT
OF PROJECT AREA
EXPOSED
100%
ESTIMATED PERCENT
VEGETATIVE COVER ~95%DENSITY
EXISTING SOIL TYPE TYPE B & C SANDY/LOAM
GROUNDWATER DEPTH FEET
NUMBER OF PHASES
W/PROJECT 2
TOTAL VOUME OF
IMPORTED (+) /
EXPORTED (-)
MATERIALS
(+) 155,000 CUBIC YARDS
TOTAL AREA OF
STOCKPILING OF FILL
OR BORROW AREAS OFF
SITE
SQUARE FEET
STEEPEST SLOPE 4 H:V
DISTANCE FROM A
RIPARIAN AREA OF
SENSITIVE AREA
1,200 FEET
KEYMAP
NTS
LEGEND
MAPPING / SITE
PROPERTY BOUNDARY
RIGHT-OF-WAY
LOT LINES
CENTER LINE
CURB AND GUTTER
PHASING LINE
EROSION CONTROL
VEHICLE TRACKING
CONTROL PAD
WATTLE DIKE
TEMPORARY SEDIMENT
INLET PROTECTION
TURF REINFORCEMENT MAT
SILT FENCE
STOCKPILE MANAGEMENT
SURFACE ROUGHENING
CONCRETE WASHOUT
STRUCTURE
PERMANENT SEEDING
SILT FENCE TO BE REMOVED
PERIMETER PROTECTION
DURING BUILDING
CONSTRUCTION
NOTES
1.THE CONTRACTOR IS RESPONSIBLE FOR
VERIFYING THE FIELD CONDITIONS ARE AS
SHOWN IN THE DRAWINGS. IF THE
CONTRACTOR FINDS DISCREPANCIES THE
CONTRACTOR SHALL CONTACT THE
ENGINEER.
2.ALL DISTURBED AREAS SHALL BE
REVEGETATED.
3.EROSION CONTROL PRACTICES, SITE
PROTECTION, AND REVEGETATION
METHODS SHALL FOLLOW CITY
REGULATIONS.
4.IN ADDITION TO THE EROSION CONTROL
MEASURES SHOWN ON THIS DRAWING, THE
CONTRACTOR SHALL COMPLETE,
COORDINATE WITH, AND UPDATE AS
REQUIRED, THE STORMWATER POLLUTION
PREVENTION PLAN (SWPP) FOR THIS
PROJECT.
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 AS
APPROVED BY ENGINEER. TYPICAL ALL
SLOPES, REPEAT AS NECESSARY UNTIL
LANDSCAPING IS INSTALLED.
6.ANY AREAS USED FOR STOCKPILING
AND/OR STAGING SHOULD ALSO HAVE
SEDIMENT AND EROSION CONTROL
MEASURES AS NECESSARY. THESE AREAS
SHOULD BE LOCATED AT LEAST 100' AWAY
FROM DRAINAGE WAYS. THE SWMP
SHOULD BE UPDATED TO SHOW THESE
AREAS AND SEDIMENT AND EROSION
CONTROL ITEMS. THE ITEMS MAY INCLUDE
BUT ARE NOT LIMITED TO VEHICLE
TRACKING CONTROL, SILT FENCE,
CONSTRUCTION FENCE, CONCRETE
WASHOUT, AND SEDIMENT TRAP.
7.TEMPORARY SEEDING OR TACKIFER
PLACEMENT SHALL BE UTILIZED IN THE
EVENT THAT A GRADED AREA IS EXPOSED
LONGER THAN 14 DAYS WITH NO
CONSTRUCTION ACTIVITY.
8.TURF REINFORCEMENT MAT SHALL BE
PYRAMAT OR APPROVED EQUAL.
9.CONTRACTOR SHALL REMOVE ALL
SEDIMENT, MUD, CONSTRUCTION DEBRIS,
OR OTHER POTENTIAL POLLUTANTS THAT
MAY HAVE BEEN DISCHARGED TO OR,
ACCUMULATE IN, THE FLOW LINES AND
PUBLIC RIGHTS-OF-WAY OF THE CITY, AS A
RESULT OF CONSTRUCTION ACTIVITIES
ASSOCIATED WITH THIS DEVELOPMENT OR
CONSTRUCTION PROJECT. SAID REMOVAL
SHALL BE CONDUCTED DAILY, AS MAY BE
REQUIRED. SUCH MATERIALS SHALL BE
PREVENTED FROM ENTERING THE STORM
SEWER.
10.THE PROJECT LANDSCAPE PLAN WILL
CONTAIN THE DETAILED INFORMATION
REGARDING REQUIRED SEED TYPES/MIXES.
11.SEE THE GENERAL NOTES SHEETS FOR ALL
OF THE CITY OF FORT COLLINS EROSION
CONTROL NOTES.
VTC
WD
TS
IP
TRM
SF
LIMITS OF DISTURBANCE
RIP RAP
FLOW DIRECTION
SF
SRSR
CWA
PSPS
A
B
BBBB
B B
B
B
PHASE 1
Implementation Timeline: Paving to Final Restoration
BBB
B B
B
B
B
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:
VERTICAL:
HORIZONTAL:
SCALE
4025 Automation Way
Suite B2
Fort Collins, CO 80525
(970) 698-6046
CivilWorxeng.com
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PRELIMINARY
NOT FOR
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36
DT05
PR
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SHEET NUMBER
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I
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:
VERTICAL:
HORIZONTAL:
SCALE
4025 Automation Way
Suite B2
Fort Collins, CO 80525
(970) 698-6046
CivilWorxeng.com
BL
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HA
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08
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1
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42
PRELIMINARY
NOT FOR
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CO
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41
DT06
SWMP
Bloom Multi-family
Fort Collins, CO
B C22026 - Bloom Multi Family Erosion Control Report FDP 1st Round.docx
APPENDIX B
State of Colorado Permit
• Permit <pending receipt>
SWMP
Bloom Multi-family
Fort Collins, CO
C C22026 - Bloom Multi Family Erosion Control Report FDP 1st Round.docx
APPENDIX C
Stormwater Management Plan Inspection Reports
• Inspection Report Template
No.
1
2
3
4
5
6
7
Yes No Yes No Yes No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified
personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for
gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for
submitting false information, including the possibility of fine and imprisonment for knowing violations.
Inspector (Signature)____________________________(Printed)________________________________________
Agency: __________________________________________________________Date: _______________________
Other
Other
Wattles
Material/Equipment Storage
Vehicle Tracking Control Pad
Sediment Trap/Basin
Seed/Crimp/Mulch/Sod
Silt Fence
Slope Protection/Terracing
Staging Area
Street Sweeping
Surface Roughening
Erosion & Sediment Control Measures
No.
Grading
Excavation
Utility Construction
Foundations
Outfall Protection
BMPs Practice Used To Be Constructed Requires
Check Dams/Dikes
Concrete Washout
Diversion Swale/Berm
Erosion Control Blankets
Good Housekeeping
Inlet Protection
Construction Sequence
Today Planned for this Week Planned for Next Week
Inspection Date: ______________ Time: ___________ __ a.m. __ p.m.
Temp: ____° F. Weather Conditions (rain, snow, cloudy, windy, etc.):
______________________________________________________________________
Type of Activity
____ Other (describe below)
___________________________________
___________________________________
___________________________________
Reason for Inspection (check one):
____ Water Running Across Site
____ Complaint
____ High Winds
____ Routine WYPDES Discharge Permit No.:
Comments (If needed, use Page 2 for
additional comments and notes)
Structural Work
Asphalt Paving
Landscaping
Construction Activities
EROSION AND SEDIMENT CONTROL INSPECTION FORM
The Contractor or Agent shall inspect all BMPs at a minimum once every two (2) weeks and after each Significant Storm Event.
Subdivision, Project or Site Name: Bloom Multi-Family
Needs Replacement (Not Functional)
SWMP
Bloom Multi-family
Fort Collins, CO
D C22026 - Bloom Multi Family Erosion Control Report FDP 1st Round.docx
APPENDIX D
Contractor Inserts
• <pending>
SWMP
Bloom Multi-family
Fort Collins, CO
E C22026 - Bloom Multi Family Erosion Control Report FDP 1st Round.docx
APPENDIX D
Erosion Control Escrow Account
• Computations
Project: Disturbed Acres:3.72
EROSION CONTROL BMPs Units
Estimated
Quantity
Unit
Price
Total
Price
L.F. 850 $2.50 $2,125.00
EA 2 $750.00 $1,500.00
EA 1 $1,500.00 $1,500.00
EA 1 $5,000.00 $5,000.00
L.F. 70 $10.00 $700.00
E.A 7 $200.00 $1,400.00
A.C 0.5 $6,000.00 $3,000.00
Sub-Total: $15,225.00
1.5 x Sub-Total: $22,837.50
Amount of security: $22,837.50
Total Acres x Price/acre: $5,580.00
$1,500.00 Sub-Total: $5,580.00
1.5 x Sub-Total: $8,370.00
Amount to Re-seed: $8,370.00
Minimum escrow amount: $3,000.00
Erosion Control Escrow:$22,837.50
Unit Price of Seeding per acre:
Miniumum Escrow Amount
Final Escrow Amount
“The amount of the security must be based on one and one-half times the estimate of the cost to install the approved measures, or one and one-half times
the cost to re-vegetate the disturbed land to dry land grasses based upon unit cost determined by the City's Annual Revegetation and Stabilization Bid,
whichever is greater. In no instance, will the amount of security be less than one thousand five hundred dollars ($1,500) for residential development or three
thousand dollars ($3,000) for commercial development”
Rock Sock (rs)
Vehicle Tracking Control (VTC)
Straw WattLe (WD)
Surface Roughening (SR)
Reseeding Amount
Erosion and Sediment Control Escrow/Security Calculation
for The City of Fort Collins
Bloom Multi-Family Development - Phase 2
BMP Amount
Silt Fence (SF)
Inlet Protection (IP)
Concrete Washout (CW)
6/6/2023 4:08 PMD:\Civilworx\CivilWorx Dropbox\CivilWorx\Projects\2022\C22026 - Bloom Multi Family\06_Design\Reports\Drainage\Appendices\APPENDIX B - BLOOM EROSION CONTROL ESCROW.pdf.xls
Project: Disturbed Acres:12.78
EROSION CONTROL BMPs Units
Estimated
Quantity
Unit
Price
Total
Price
L.F. 3450 $2.50 $8,625.00
EA 5 $750.00 $3,750.00
EA 1 $1,500.00 $1,500.00
EA 1 $5,000.00 $5,000.00
L.F. 350 $10.00 $3,500.00
E.A 35 $200.00 $7,000.00
A.C 2 $6,000.00 $12,000.00
Sub-Total: $41,375.00
1.5 x Sub-Total: $62,062.50
Amount of security: $62,062.50
Total Acres x Price/acre: $19,170.00
$1,500.00 Sub-Total: $19,170.00
1.5 x Sub-Total: $28,755.00
Amount to Re-seed: $28,755.00
Minimum escrow amount: $3,000.00
Erosion Control Escrow:$62,062.50
Erosion and Sediment Control Escrow/Security Calculation
for The City of Fort Collins
BMP Amount
Silt Fence (SF)
Vehicle Tracking Control (VTC)
Straw Wattle (WD)
Reseeding Amount
Rock Sock (rs)
Miniumum Escrow Amount
Bloom Multi-Family Development - Phase 1
Unit Price of Seeding per acre:
“The amount of the security must be based on one and one-half times the estimate of the cost to install the approved measures, or one and one-half times
the cost to re-vegetate the disturbed land to dry land grasses based upon unit cost determined by the City's Annual Revegetation and Stabilization Bid,
whichever is greater. In no instance, will the amount of security be less than one thousand five hundred dollars ($1,500) for residential development or three
thousand dollars ($3,000) for commercial development”
Inlet Protection (IP)
Concrete Washout (CW)
Surface Roughening (SR)
Final Escrow Amount
6/6/2023 4:08 PMD:\Civilworx\CivilWorx Dropbox\CivilWorx\Projects\2022\C22026 - Bloom Multi Family\06_Design\Reports\Drainage\Appendices\APPENDIX B - BLOOM EROSION CONTROL ESCROW.pdf.xls