HomeMy WebLinkAboutCROWNE AT OLD TOWNE NORTH - FDP - FDP170025 - SUBMITTAL DOCUMENTS - ROUND 2 - STORMWATER MANAGEMENT PLANStormwater Management Plan for
Crowne at Old Town
Fort Collins, Colorado
Prepared By
Aspen Engineering
November 29, 2017
Page 2 of 24
TABLE OF CONTENTS
DESCRIPTION PAGE
I. GENERAL LOCATION AND SITE DESCRIPTION
A. Location 3
B. Description of Property 3
C. Description of Construction Activity 5
D. Activity Sequence 5
E. Areas 6
F. Hydrologic Criteria 6
G. Existing Ground Cover & Soil Amendments 7
H. Potential Pollution Sources 7
I. Non-Stormwater Discharge 10
J. Receiving Water 11
II. SITE MAP 11
III. STORMWATER MANAGEMENT CONTROLS 11
A. Erosion and Sediment Controls 11
B. SWMP Administrator 13
C. Material Handling and Spill Prevention 13
IV. FINAL STABILIZATION AND LONGTERM STORMWATER MANAGEMENT 15
V. INSPECTION AND MAINTENANCE 15
VI. REFERENCES 17
APPENDIX A 18
DAILY STORMWATER MANAGEMENT PLAN LOG
VICINITY MAP
Erosion Control Plan (EC-01 - EC-03)
Erosion Control Notes & Details Sheet (EC-04 & EC-05)
Drainage Exhibit (C-011)
EROSION CONTROL ESCROW CALCULATION (Excerpt from Drainage Report)
Page 3 of 24
STORMWATER MANAGEMENT PLAN
FOR CROWNE AT OLD TOWN NORTH
FORT COLLINS, COLORADO
I. GENERAL LOCATION AND SITE DESCRIPTION
A. Location
The Crowne at Old Town North project is located approximately 450 feet east of
North College, along future Suniga Road. The property is bound to the west by a
portion of Dry Creek and Jax Outdoors. The property is bound to the north by
Conifer Street and to the south by future Suniga Road. The Aspen Heights
development bounds the property to the east.
The project site can also be described as situated in the southwest quarter of
Section 1, Township 7 North, Range 69 West of the 6th P.M., City of Fort
Collins, County of Larimer, State of Colorado. The site (property boundary)
comprises approximately 15.71 acres (see vicinity map Appendix A).
B. Description of Property
The proposed development consists of 289 apartment units housed in five
buildings, 15 townhome units housed in four buildings, a maintenance garage, a
community pool, and associated street, water, sanitary sewer, storm sewer, and
private infrastructure improvements, as well as intermittent green spaces and
outdoor spaces.
The project site currently is an existing 15.71-acre vacant field comprised of
primarily dirt with native weeds and grasses. The site was formerly used as a
materials staging area during the construction of the Aspen Heights development.
Dry Creek runs along the west boundary of the proposed site.
The majority of the existing site (east portion) has topography which generally
slopes from the northwest to the south-southeast at approximately 0.5%, with
varying slopes from 0.3% to 0.8%.
The Crowne at Old Town North project lies within the City of Fort Collins Dry
Creek Drainage Basin. The Dry Creek Drainage Basin generally flows from the
northwest to southeast and ultimately outlets into the Poudre River.
In speaking with the City of Fort Collins Stormwater Department, the proposed
development is not required to provide detention or water quality as both water
Page 4 of 24
quality and detention volume for the Crowne site is being provided in the NECCO
regional detention pond. The NECCO regional pond is scheduled to be
constructed at the beginning of 2018.
The development is part of the NECCO Master Plan. NECCO Storm Sewer C1
travels along the southern boundary of the site, adjacent to Suniga Road. The
storm sewer starts at the NECCO regional pond and heads west as a 66-in
reinforced concrete pipe (RCP). Per the current NECCO materplan, the storm
sewer is to transition to a 48-in storm sewer at the southeast corner of the site.
However, per the City Stormwater’s request, the 66” RCP shall be extended
further west and to the first private drive, that runs north-south, within the
southeast corner of the Crowne at Old Town North project. The 66” RCP will
transition down to a 48” RCP at the first private drive and will be extended west
to Crowne’s western property boundary.
It’s important to note that the NECCO masterplan improvements show the 48-in
storm sewer making a 90-degree bend at the southwest corner of the Crowne site
and traveling north along the existing Dry Creek alignment. Per discussions
with City Stormwater, the 48” extension to the north will not be required at this
time, as the intent of the 48” RCP is to serve the developed condition of properties
to the west and not the Crowne site.
Therefore, a storm sewer stub-out will be provided to the north (at Crowne’s
southwest corner) to allow for runoff, from properties to the west and northwest,
that flows in the existing open ditch (along Crowne’s western boundary) to be
conveyed into the NECCO 48” storm system that runs west-to-east along the
north side of Suniga Road. The flows from the attributable, adjacent, existing
properties and from the proposed project site will be conveyed east and into the
regional detention pond. The 66-in storm sewer was constructed with the Aspen
Heights development. The extension of the 66-inch storm sewer and the
transition to the 48-in storm sewer will be constructed with this project, as noted
above.
The proposed site was broken into four major basins and included into the Dry
Creek master plan model to insure that the proposed design would meet the
design intents of the master plan. Basin Crowne-West represents basins 18-23.
These basins will drain into the 48-in storm sewer at the southwest corner of the
property. Basin Crowne-Main represents the majority of the proposed
development (basins 1-17 and OS1). This basin discharges into the 66-in storm
sewer in the southeast quadrant of the site. The modeling demonstrated that the
proposed development can drain into the NECCO system at both design points.
The hydraulic grade line in the 48-in storm sewer is reduced slightly from the
master plan conditions.
The basins draining to Suniga Road were also adjusted in the master plan model
as well as the basins draining to Conifer Street. This was to insure that the minor
Page 5 of 24
change in basin area does not negatively impact the NECCO storm sewer system.
These basins are described in more detailed in sections below.
C. Description of Construction Activity
The proposed development is to transform a vacant field comprised of primarily
dirt with native weeds and grasses. Site infrastructure will be constructed in a
single phase, though the capital improvements to Suniga Road on the south
boarder of the site will be completed separate to this development and may be
completed concurrent to this development. In the event that construction is
concurrent, erosion control measures on site will need to be coordinated with the
SWMP manager for the Suniga Road capital improvements.
The initial construction activities will include demolition of existing
infrastructure, topsoil removal and stockpiling, overlot grading of the site, and
excavation for LID basins and utility construction.
Construction of public infrastructure improvements will include construction of
underground utilities, drainage structures, porous pavers, new roads and building
pad sites. Construction work includes trenching and installation of pipelines for
water, sanitary sewer, storm sewer, and roof drains; subgrade preparation;
construction of new curbs and sidewalks; paving for new streets; signage and
pavement striping; revegetation of disturbed areas; and excavation for building
pads. Erosion control measures will be implemented and revegetation of disturbed
areas provided to minimize erosion and the transport of sediment and pollutants
from the project site.
D. Activity Sequence
The major activity sequence for the project will be as follows:
1) Installation of the required initial erosion and sediment control measures;
2) Topsoil excavation and stockpiling on-site.
3) Demolition of curb and gutter, asphalt, clear and grubbing.
4) Overlot grading, including roadways, access drives, drive aisles, and
parking lot areas.
5) Excavation and grading of the swale areas.
6) The required erosion control measures will be installed for the stormwater
system, swales, and existing inlets.
7) Utility construction: trenching and installation of pipelines for water,
sanitary sewer, and storm sewer.
8) Roadway, Access Drives, Drive Aisles, sidewalks, and Parking Lot
construction: Street subgrades will be excavated and prepared. Paving of
roadways, drive aisles, parking lots, curb and gutter, and sidewalks to be
constructed based on weather and timing of building construction.
9) Lighting, and signage and striping will be installed.
Page 6 of 24
10) The required erosion control measures will be installed or updated, as may
be applicable.
11) Excavation for foundation(s).
12) Stabilization, permanent seeding, mulching, sod, and other landscaping
will be installed.
13) Perform routine maintenance and inspections of BMP's after storm events.
14) Removal of control measures.
Unloading and Loading of construction materials shall be completed in a manner
to mitigate disturbance to existing soils and prepared soils to the extent possible
and as allowed within the normal means of construction. The contractor is
encouraged to provide specific loading and unloading areas so as to minimize
heavy truck traffic disturbing prepared and existing soils, which could cause
additional erosion control measures being required for the site/project.
E. Areas
The project site currently is an existing 15.71-acre vacant field comprised of
primarily dirt with native weeds and grasses. The site was formerly used as a
materials staging area during the construction of the Aspen Heights development.
Dry Creek runs along the west boundary of the proposed site. The entire 15.71
acres will undergo topsoil removal, stockpiling and overlot grading. Areas
expected to be exposed for more than 30 days shall be temporarily revegetated to
minimize erosion potential.
The majority of the existing site (east portion) has topography which generally
slopes from the northwest to the south-southeast at approximately 0.5%, with
varying slopes from 0.3% to 0.8%.
The proposed development consists of 289 apartment units housed in five
buildings, 15 townhome units housed in four buildings, a maintenance garage,
community pool, and associated street, water, sanitary sewer, storm sewer, and
private infrastructure improvements, as well as intermittent green spaces and
outdoor spaces.
F. Hydrologic Criteria
The Final Drainage and Erosion Control Report for Crowne at Old Town North,
dated November 1
st
, 2017, is concurrently under review by the City of Fort
Collins. The report shall be followed and implemented. The project site’s current
use is as a naturally vegetated vacant lot with some gravel and two pavement
pads, which correlates to a runoff coefficient of 0.34. Development of the project
site includes the construction of roads, homes, and sidewalks, causing an increase
to overall imperviousness. The composite developed runoff coefficient for the
proposed site is 0.76.
Page 7 of 24
A subsurface soil investigation was performed by Terracon Geotechnical
Engineering, a qualified geotechnical consultant company, to determine the
existing soil characteristics. Please refer to the GeoReport for Crowne at Old
Town North, Fort Collins, Colorado, Project No. 20175033, dated May 1, 2017,
by Terracon, for specific details.
G. Existing Ground Cover & Soil Amendments
Currently the site is a vacant lot which is approximately 90% covered with native
grasses and weeds. The site is comprised of two pavement surfaces and vegetated
ground. The vegetation area consists of approximately 70% grass with weeds and
15% exposed bare ground with sparse vegetation of grass and weeds.
Soil Amendments:
Soil Amendments for the property are anticipated for the landscaping and planting
along and throughout green spaces/ open areas, lawns, parkways, and other
landscaped areas. Such soil amendment areas shall adhere to the approved
landscape plans and sections 12-130 through 12-132 of the City Code for such
soil amendments.
Sec. 12-132. Regulations (for Soil Amendments).
(a) Except as otherwise provided below, the holder of any building permit
shall, as a condition of the issuance of a certificate of occupancy, prepare
any area in which any plant materials, including but not limited to grass,
seed, flowers, shrubs or trees, are expected or intended to be installed,
prior to installation of any plant materials in that area, as follows:
(1) The soil in such areas shall be thoroughly loosened to a depth of not
less than eight (8) inches; and
(2) Soil amendments shall be thoroughly incorporated into the soil of such
areas to a depth of at least six (6) inches by tilling, discing or other
suitable method, at a rate of at least three (3) cubic yards of soil
amendment per one thousand (1,000) square feet of area to be planted,
unless at least four (4) inches of loose top soil has been placed on the area
after completion of construction activity on top of not less than four (4)
inches of loosened subgrade soils.
H. Potential Pollution Sources
The following potential pollution sources are identified below and measures are
suggested to protect stormwater quality and prevent contaminates from migrating off-site.
Refer to the SWMP exhibits for the location of BMP’s, stockpiled topsoil areas, staging
Page 8 of 24
areas, waste storage, portable toilets, and site trailer. These locations are provided for
guidance and may be repositioned based on site conditions or Contractor preferences.
1. Disturbed and Stockpiled Topsoil
Approximately 15.71 acres of land will undergo clearing, grubbing and topsoil
removal. Excavation will also be required for underground utility construction,
roadways, parking lots and building foundations. Excavated topsoil will be
placed in stockpiles not to exceed 10’ in height. Stockpiles must be a minimum
of 50 feet from storm sewer inlets and detention pond. Provide temporary seeding
and ample irrigation to establish vegetation on topsoil stockpiles and on disturbed
soil areas. Disturbed soil shall be maintained in a roughened surface condition
and graded with gentle slopes to enhance infiltration and prevent concentrated
runoff from occurring. Stockpiled soil shall be temporarily seeded if stored more
than 30 days. Installation of perimeter silt fence around stockpiles, property
boundaries and phase limits as necessary to prevent migration of soil. Other
BMP’s will include wattle check dams and wattle inlet filters in swales and at
storm inlets.
2. Vehicle Tracking of Sediments
Vehicle tracking pads constructed at the project entrances on Jerome, Lupine, and
Suniga are intended to reduce the tracking of soil onto public streets during
construction. Soil tracked off-site onto paved roads shall be scrapped, collected
and disposed of properly. If tracking of soils offsite persists, additional gravel
paving of parking areas delivery areas and/or access routes may be necessary to
reduce tracking.
3. Management of Contaminated Soils
No contaminated soils have been identified on the parcel. If contaminated soils
are identified during grading, the areas should be marked and the Owner
contacted so a remediation plan can be implemented.
4. Loading and Unloading Operations
Delivery of site materials has potential for impacting runoff quality. Designated
areas for deliveries shall be established to safely load and unload materials.
Hazardous material delivered to site shall be covered and in sealed containers.
Contractor staging areas may be established to drive in and deliver materials on
graved surfaces to minimizing tracking soils offsite.
5. Outdoor Storage Activities
Hazardous materials such as fuel, solvent or fertilizer used on site shall be in a
secure covered area. Ample sorbent material and containment shall be available
to contain a spill.
6. Vehicle and Equipment Maintenance and Fueling
Heavy machinery will be operated on the project site requiring the use of fuel
trucks. Re-fueling operations and equipment maintenance shall be done in dry
Page 9 of 24
weather conditions and on level ground to prevent and manage soil
contamination. Ample sorbent material and containment shall be available to
contain a spill. Day to day cleaning and maintenance of equipment has the
potential to impact stormwater quality. A designated area should be established
for refueling and maintenance with adequate separation from drainage paths and
ponds. Potential flow paths for spills shall be assessed prior to any fuel or
hazardous substance transfer. Secondary containment shall be implemented for
storage and transfer areas. Any storm drain conveyance within a containment area
shall be protected with berms or plugs. Washing of vehicles or equipment into the
storm drainage system is prohibited.
7. Significant Dust or Particulate Generating Processes
Provide regular watering operations to moisten soils and reduce fugitive dust
during dry conditions.
8. Routine Maintenance Activities
Stored fuel, solvent and fertilizer used on the site shall be in a secure covered
area. Fertilizers will be used to establish temporary and permanent vegetation
during and after construction. MSD sheets should be maintained on site and
posted. Storage bins, containers should be inspected regularly for evidence of
leakage or damage and measures take to fix or repair damage. Materials should
be securely transported when in use and applied or used as recommended by the
manufacturer.
9. On Site Waste Management Practices
Contractor staging areas, dumpsters, and waste receptacles shall be located at
least 50 feet from water courses and inlets, and on a level gravel surface to reduce
generating dust and erosion in these high traffic areas. Perform routine
maintenance and dispose of waste promptly and properly off-site.
10. Concrete Truck/Equipment washing
A concrete washout basin or potable washout unit shall be provided at least 50
feet from a water course or inlet, with such basin being determined by the
Contractor. The Contractor shall notify the Engineer and the City of Fort Collins
Erosion Control Inspector as to the location, size, and type of concrete washout
that will be utilized for the project. Wash fluids are to be contained with waste
product and disposed of properly off-site.
11. Dedicated Asphalt and Concrete Batch Plants
Concrete and asphalt batch plants will not be used on the project site. Premixed
paving materials will be delivered to the site and placed.
12. Non-Industrial Waste Sources
Portable toilets shall be located at least 50 feet from water courses and inlets, and
on a level gravel surface to reduce generating dust and erosion in these high
traffic areas. Perform routine maintenance and dispose of waste promptly and
Page 10 of 24
properly off-site. Locations for trash and portable toilets are identified on the
SWMP exhibit.
13. Dewatering Activities
A Colorado groundwater discharge permit will be required if dewatering becomes
necessary during construction. Contractor shall comply with State and Federal
regulations for discharging stormwater and groundwater.
Refer to Section III.C. Material Handling and Spill Prevention, for additional
details on controlling the potential pollution sources.
I. Non-Stormwater Discharge
Firefighting activities on the site will be managed with Poudre Fire Authority. As
these conditions are not under direct control of the SWMP Administrator they
should be exempt from this plan. However, erosion control measures shall be in
place and maintained as practical during and after a fire fighting event. All
underground water utilities, sewer and storm must be constructed, tested and
approved prior to initiating construction of any buildings. By that time the street
curb, gutter and pavement is expected to be constructed also. Fire trucks will
need to have a paved or all weather surface to support the fire fighting vehicles.
All surface erosion control measures must be installed and maintained during
construction. Inlet protection will be installed after the inlets are constructed to
protect them from sediment transport during firefighting activities or storm
events. Flow would be conveyed in swales, curb and gutter and the storm sewer
system directed to the constructed detention pond areas. Erosion control
measures such as inlet protection and straw wattles shall be maintained until the
site is stabilized and vegetation established.
Prior to installation and approval of underground water utilities, the site will be
bare earth. Fire hazards would include construction vehicles, refueling areas and
storage materials. Runoff from storm events or firefighting will be routed across
the surface to constructed swales and detention ponds with erosion control
measures in place.
Groundwater, as determined from the initial geotechnical drilling investigations,
was encountered at 5.2’-10.0’ during drilling, and located at 7.2’-7.6’ twelve days
later. Drilling occurred at a maximum depth of 34 feet below existing grade.
Observations represent groundwater conditions at the time of the field
exploration, and may not be indicative of other times or at other locations from
where test borings were taken. Therefore, groundwater may or may not be
encountered during construction. The contractor shall have a NPDES permit in
the event groundwater is encountered during construction. The permitting may
take 45 days to complete.
Page 11 of 24
J. Receiving Water
The Crowne at Old Town North project lies within the City of Fort Collins Dry
Creek Drainage Basin. The Dry Creek Drainage Basin generally flows from the
northwest to southeast and ultimately outlets into the Poudre River. The proposed
development is not required to provide detention or water quality as both water
quality and detention volume for the Crowne site is being provided in the NECCO
regional detention pond. The NECCO regional pond is scheduled to be constructed
at the beginning of 2018.
II. Site Map
Site maps for this SWMP are represented on the Erosion Control Plan (EC-01
through EC-03), and the Erosion Control Notes and Details (EC-04 and EC-05)
for site erosion controls. Please refer Appendix A for these maps.
III. Stormwater Management Controls
A. Erosion and Sediment Controls
This project will implement various Best Management Practices (BMP's) for the
treatment of storm water runoff as outlined below. The location of BMPs are represented
on the Site Map exhibits, with the following being implemented for the project:
Structural Practices
Silt fence
Straw wattle check dams
Diversion ditches and drainage swales
Gravel inlet filters and wattles and rock socks
Erosion control fabric
Vehicle tracking pad
Riprap
Non-Structural Practices
Roughened overlot grading with gentle slopes
Preservation of existing vegetation
Temporary and permanent seeding, sod, and crimped straw mulch
Pre-Sedimentation Basins
Water application to suppress dust control
Page 12 of 24
The potential exists for erosion problems during construction, but should be minimal
after completion of Crowne at Old Town North development. Silt fence has been
installed along the north, south, east, and west sides of the site to prevent sediment from
leaving the site and prevent relocated prairie dogs from re-entering the site. Silt fence
will need to maintained and modified as needed throughout construction practices.
Tracking pads will also be placed at entrances/exits to the site. Straw wattle inlet filters
will be placed around area inlets in green spaces. Wattle inlet filters will be placed at the
opening of the proposed Type R inlets and area inlets located in the paved areas. During
the construction of Crowne at Old Town North, disturbed areas will be permanently
landscaped or temporarily seeded and mulched within 30 days of initial disturbance.
Prior to grading operations and construction, the structural erosion controls must be
installed and vehicle tracking pads constructed at the project entrances on Jerome,
Lupine, and Suniga. If construction of Suniga is initiated by City of Fort Collins the
tracking pad will be the responsibility of the City of Fort Collins. Tracking pads will
reduce tracking of soil onto public roads during construction. Existing silt fence shall be
inspected and maintained around the perimeter of the disturbed property.
Immediately after storm sewer improvements are constructed, erosion control measures
shall be installed and maintained. Drainage swales constructed on the project site will be
protected with installation of wattle check dams and runoff will be conveyed to the
proposed drainage structures and detention ponds across the site. Erosion control fabric
shall be installed in drainage areas and the slopes identified on the Erosion Control Plan.
Fabric shall be installed in accordance with manufactures guidelines and
recommendations. Structural practices such as temporary wattle inlet filters will be
provided at proposed inlets. Wattle filters will also be installed at the curb cut locations.
Temporary wattle inlet filters will also be installed at existing inlet locations.
Any disturbed land should be revegetated with seed or sod or crimp mulched as soon
after grading as weather permits. This will provide the opportunity for pollutants to settle
out of the storm water runoff.
The surface of overlot graded terrain should be kept in a roughened condition until final
preparation for foundations or landscaping. Existing vegetation should be preserved as
much as possible. Soil stockpiles shall not exceed 10 feet in height and shall receive
temporary grass seeding to establish vegetated cover. Temporary and permanent grass
seeding must be initiated in construction lasting 30 days or more to vegetate disturbed
areas, as called for in the approved drainage and erosion control report and erosion
sheets, as well as the approved landscape plans for the project.
Sediment and debris deposition on the upstream side of silt fence must be removed
following significant storm events and as needed to allow the erosion control structures to
function effectively. Damaged fence must be replaced or repaired as evident during
regular inspections. Erosion and sediment controls must be maintained until the site has
uniform cover equivalent to 70% of the original site condition. Cover may include
vegetation in the interim condition.
Page 13 of 24
Disturbed areas not in a roadway or greenbelt area shall have temporary vegetation seed
applied within 30 days of initial disturbance. After seeding, a hay or straw mulch shall be
applied over the seed at a rate of 1.5-tons/acre minimum, and the mulch shall be
adequately anchored, tacked, or crimped into the soil. Those roads that are to be paved as
part of the Crowne at Old Town North development must have a 1-inch layer of gravel
mulch applied at a rate of at least 135 tons/acre immediately after overlot grading is
completed. The pavement structure shall be applied within 30 days after the utilities have
been installed.
If the disturbed areas will not be constructed upon within one growing season, a
permanent seed shall be applied. After seeding, a hay or straw mulch shall be applied
over the seed at a minimum rate of 1.5 tons/acre, and the mulch shall be adequately
anchored, tacked or crimped into the soil. In the event a portion of the roadway
pavement surface and utilities will not be constructed for an extended period of time after
overlot grading, a temporary vegetation seed and mulch shall also be applied to the
roadway areas as previously discussed. Please refer to the approved landscape plans for
the seed, plant, shrub, and mulch types, as well as irrigation needs for the project.
B. SWMP Administrator
The Storm Water Management Plan (SWMP) shall be developed, implemented,
maintained, and revised under the direction of a single individual identified as the SWMP
Administrator for the project site. This contact will be available throughout the project as
the authority for management of the site stormwater quality.
SWMP Administrator: William Dover-Project Superintendent
Crowne Partners, Inc.
505 N 20th Street, Suite 1015
Birmingham, AL 35203
(205) 630-9311 Cell
(205) 328-3120 Office
This SWMP may require modification to accurately reflect the actual field conditions.
Recommendations for changes shall be documented in the SWMP inspection reports.
SWMP revisions shall be made immediately after field changes. Revisions shall be made
as soon as possible, but within 72 hours after installation of new BMP's, materials or
methods of installation are made.
C. Material Handling and Spill Prevention
Upon confirmation from the Contractor of the desired locations for fuel, equipment, and
materials storage, the SWMP Administrator shall record the location of potential
Page 14 of 24
pollutants on the site map. Descriptions of the potential pollutants shall be added to the
SWMP log book.
The Contractor shall provide a Spill Prevention, Control, and Countermeasure Plan
(SPCC) for any petroleum product, chemicals, solvents, or other hazardous materials in
use, or in storage, at the work site. Work shall not be started until the plan has been
submitted to and approved by the Local Entity Engineer, Fire Department, State
Jurisdictional Entities, and the EPA, as applicable.
Spill Prevention, Control and Countermeasure Plan shall be developed and implemented
to establish operating procedures and the necessary employee training to minimize the
accidental releases of pollutants that can contaminate stormwater runoff.
The Spill Prevention, Control, and Countermeasure Plan shall contain the following
information:
1. Identification and contact information of the ECS and the Contractor and
2. CDOT spill cleanup coordinators.
3. Locations of areas on project site where equipment fueling and servicing
operations are permitted.
4. Location of cleanup kits.
5. Quantities of chemicals and locations stored on site.
6. Label system for chemicals and Materials Safety Data Sheets (MSDS) for
products.
7. Clean up procedures to be implemented in the event of a spill that does not enter
state waters or ground water.
8. Procedures for spills of any size that enter surface waters or groundwater, or have
the potential to do so.
9. CDOT’s Erosion Control and Stormwater Quality Guide (current edition)
contains Spill notification contacts and phone numbers required in the SPCC
10. A summary of the employee training provided. Information in items 1 through 8
shall be updated when it changes.
Measures should be undertaken to control building materials, waste, and disposal of
excess asphalt and concrete to ensure these materials do not enter waterways. Asphalt,
concrete, building materials, waste and cleanup by-products shall not be allowed to enter
the on-site curb inlets and storm sewer systems nor shall they be allowed to enter the
detention ponds. Measures shall be undertaken to remove excess waste products from the
site and dispose of these waste materials off-site in an appropriate manner.
The Contractor shall inspect equipment and stored materials daily for leaks or spills and
take corrective action to repair such conditions. Pre-approved absorbent material and/or
containers shall be provided as preventative measures to avoid contact with soils or
pavement.
Any periodic refueling of earthmoving equipment on site shall be carefully controlled to
ensure these materials are not spilled on the site and will not enter the existing detention
Page 15 of 24
pond. In the event of a spill from the site into an on-site curb inlet or storm sewer
system, appropriate measures shall be undertaken immediately to contain spilled
pollutants and properly remove the spilled materials along with all contaminated soils and
prevent future spills from occurring. In addition, measures shall be undertaken to limit
off-site soil tracking of mud and debris spillage from vehicles leaving the site. Mud and
debris shall not be tracked along roadways nor allowed to enter any non-protected
drainage path.
The pollutant sources and suggested BMP measures are identified in Section H of this
plan, to protect stormwater quality and prevent contaminates from migrating off-site.
In the event of a spill, spill prevention procedures should be implemented and posted on
site. The Stormwater Management Plan Administrator is responsible for coordination
efforts and to serve as contact for reporting spills. Spills shall be reported to the
Stormwater Management Plan Administrator who will determine if the Colorado
Department of Public Health and Environment (24-hour spill reporting 877-518-5608)
or downstream water users need to be contacted. Training for cleanup procedures,
location of spill kits, and use of materials shall be provided, as well as posted locations
and procedures for properly washing out concrete trucks and equipment to prevent
discharges from the site.
IV. FINAL STABILIZATION AND LONGTERM STORMWATER MANAGEMENT
Following site construction, the goal is to achieve a stabilized cover condition to provide
long-term stormwater protection. Stabilization is quantified by achieving uniform cover
equal to 70% of the pre-disturbance condition. The post-construction condition of the site
will be that the majority of the site will be surfaced with concrete walkways, concrete
curbs, gutters and asphalt pavement. Stabilization should be fulfilled as it relates to
stability of soil because the hard surfaces constructed and the permanent landscaping
features will virtually eliminate erosion from the site. Vehicle tracking pads are to be
removed as final pavement is placed. Permanent seeding with mulching shall be installed
over the remaining disturbed ground. Drainage ditches, pans, and culverts must be
cleaned of debris and sediment. Sediment and debris on paved surfaces shall be removed
and the surfaces swept clean. Eroded slopes or drainage paths shall be repaired by
backfilling. Remove all silt fences following establishment of permanent stable
vegetation to the satisfaction of the City of Fort Collins inspector.
V. INSPECTION AND MAINTENANCE
Inspection and maintenance shall be undertaken at least every 14 days and within 24
hours of a precipitation event or snow melt, which may cause runoff to occur. Routine
maintenance inspections shall be conducted to ensure proper function of BMP's and to
identify areas in need of additional protection or maintenance. The inspection shall
include observation of the construction site perimeter and discharge points (including into
Page 16 of 24
a storm sewer system), all disturbed areas, any areas used for material storage that are
exposed to precipitation, any areas used for washing of machinery, the vehicle tracking
pad, concrete washout, and any other erosion and sediment control measures, as well as
the inspection all silt fence, wattles, gravel inlet filters, and check dams. Structures shall
be reset or repaired, as needed, and any excess sediment deposits removed.
Hazardous materials such as fuel, solvent or fertilizer, used on site, shall be in a secure
covered area. An inspection log shall be kept up to date to record inspections, repairs,
maintenance and recommendations for updates to the SWMP. Additionally, any spills
shall be fully documented and include: (1) what the spill material was; (2) reason for
spill; (3) date, time of start and finish of spill, quantity, and location of spill, weather
conditions, and who was contacted, and how the spill was cleaned; (4) impact to
environment, and method of disposal of cleanup materials. A sample of the inspection
log is provided as an attachment to this plan.
All construction activities shall comply with the State of Colorado permitting process for
Stormwater Discharges Associated with Construction Activity. A Colorado Department
of Public Health and Environment (CDPHE) Permit will be required before any
construction grading can begin.
THIS SWMP MUST BE AMENDED TO REFLECT SITE CHANGES THAT
IMPACT THE EFFECTIVENESS OF BMP’S OR CHANGES IN THE TYPE OF
BMP’S USED. THE SWMP SITE MAP SHALL ALSO BE AMENDED AS
NEEDED TO REFLECT CHANGES WHICH INCLUDE BMP’S, STOCKPILES
LOCATIONS, ETC.
Page 17 of 24
VII. REFERENCES
1. GeoReport, Crowne at Old Town North, Fort Collins, Colorado, by Terracon
Geotechnical Engineering, May 1, 2007.
2. Final Drainage and Erosion Control Report for Crowne at Old Town North, Fort
Collins, Colorado, dated November 29, 2017, by Aspen Engineering.
3. SWMP Guidance Preparing a Stormwater Management Plan (SWMP), Stormwater
Construction General Permit, Water Quality Control Division, CDPHE, revised June,
2011.
Page 18 of 24
APPENDIX A
Page 19 of 24
STORM WATER MANAGEMENT PLAN FIELD INSPECTION
Project: Crowne at Old Town North
SWMP Administrator: ______________________________________________
Inspector: _______________________ Date:____________ Time: _________
Title: __________________________
Weather: ________________________________
REASON FOR INSPECTION
___ Routine Inspection (14 day minimum)
___ Runoff Response Storm Start______ End_______ Duration ______
___ Snow Melt
SWMP MANAGEMENT
Estimated area of disturbance at time of inspection: ______acres or ________%
Is SWMP notebook located on site?_____
Are changes to the SWMP documents noted and approved? _______
Are the inspection reports retained in the SWMP notebook: _______
Are corrective actions from the last inspection completed? _______
Is a list of potential pollutants retained at the site? _______
BMP AND EROSION CONTROL INSPECTION ITEMS
For each item indicate: “Y” = In Use or “N” = Not used
EROSION CONTROL SEDIMENT CONTROL
______Straw Bale Dike ______Inlets Filters
______Pond Outlet ______Silt Fence
______ Erosion Control Fabric ______Vehicle Tracking Pad
______ Riprap Structures ______ Pond Sediment
______ Storm Pipe Outlets ______ Perimeter Control
______ Drainage Pans
______ Seeding
______ Mulching
______ Disturbed Surface/Roughening
MATERIAL HANDLING, SPILL PREVENTION, WASTE
MANAGEMENT AND GENERAL POLLUTION PREVENTION
______ Storage Areas
______ Stockpiled Materials
______ Concrete Washout
______ Sanitary Facilities
______ Street Sweeping
______ Waste Management
Page 20 of 24
CONSTRUCTION SITE ASSESSMENT AND CORRECTION ACTIONS
All erosion and sediment control practices identified in the SWMP shall be evaluated to
ensure that they are maintained and operating correctly. Identify the condition of the
BMP, using more than one letter if necessary: (I) Incorrect Installation; (M) Maintenance
is needed; (F) BMP failed to operate; (A) Additional BMP is needed; (R) Remove BMP.
Additional copies of this form may be used for additional items.
Location BMP Condition Corrective Action and
Preventative Measure Taken
Date
Complete
& Initials
CONSTRUCTION SITE ASSESSMENT
Provide Yes or No response for the following questions below.
Is there evidence of discharge of sediment or other pollutants from the site?
_________________
Has sediment or other pollutants discharging from the site reached state waters?
_____________
Describe the location of sediment/pollutants discharge
________________________________________________________________________
________________________________________________________________________
GENERAL NOTES
Page 21 of 24
INSPECTION CERTIFICATION
I certify under penalty of law that based on my inspection and observations documented
above, 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 Title Date
COMPLIANCE CERTIFICATION
Corrective action(s) has been taken, or where a report doesn't identify any incidents
requiring corrective action, the report shall contain a signed statement indicating the site
is in compliance with the permit to the best of the signer's knowledge and belief.
__________________________ ____________________ ________________
Inspector Signature Title Date
NOTE: Modifications to the SWMP must be updated immediately to reflect the
field conditions. SWMP Field Inspection forms shall be completed for each
inspection event. Changes noted on the Erosion Control Plan and/or Erosion
Control Notes and Details sheets shall be kept with the respective inspection form.
All inspection documentation and spill reports shall be filed on site and available for
review at any time.
Page 22 of 24
MATERIALS HANDLING
Item Delivered: Date:
Actions Taken:
________________________________________________________________________
SPILL REPORTING
Material Spilled:
________________________________________________________________________
Why Material was Spilled:
____________________________________________________________
Quantity: __________________________________________________________
Location: _______________________________________________________
Weather Conditions: ________________________________________________
Spill Start Time: ________________ Spill Stop Time: _____________________
Cleanup Method: ___________________________________________________
Disposal Method: ___________________________________________________
Enter N/A if item is not applicable to the site Stormwater Management Plan
Page 23 of 24
CONTACT INFORMATION/RESPONSIBLE PARTIES
Owner/Developer
Crowne Partners, Inc.
505 N. 20th Street, Suite 1015
Birmingham, AL 35203
Phone: (205) 328-3120
SWMP Administrator
Crowne Partners, Inc.
505 N. 20th Street, Suite 1015
Birmingham, AL 35203 Phone: (205) 328-3120 office
William Dover Phone: (404) 630-9311 cell
email: odover@crownepartners.com
This SWMP Prepared by
Aspen Engineering
19 Old Town Square
Suite 238 Phone: (970) 419-4344
Fort Collins, CO 80524 email: johng@Aspen-Engineer.com
Civil Engineer
Aspen Engineering
John Gooch
19 Old Town Square
Suite 238 Phone: (970) 420-5345
Fort Collins, CO 80524 email: johng@Aspen-Engineer.com
Emergency Contacts
Poudre Fire Authority Emergency: 911
Administration Non-Emergency Phone: (970) 416-2891
102 Remington Street Fax: (970) 416-2809
Fort Collins, CO 80524
Permitting Agency
Colorado Department of Public Health and Environment (CDPHE)
Water Quality Control Division
WQCD-Permits P-B2 Phone: (303)692-2000
4300 Cherry Creek Drive South www.cdphe.state.co.us
Denver, CO 80246 24-hour spill reporting 1-877-518-5608
Page 24 of 24
Site Contractor
Company: __________________________________
Contact: _____________________ Phone: ________________________
Street: ______________________ Fax: ________________________
City, State Zip________________________________________________
email: ______________________________________________________
Site Sub-Contractor
Company: __________________________________
Contact: _____________________ Phone: ________________________
Street: ______________________ Fax: ________________________
City, State Zip________________________________________________
email: ______________________________________________________
Site Sub-Contractor
Company: __________________________________
Contact: _____________________ Phone: ________________________
Street: ______________________ Fax: ________________________
City, State Zip________________________________________________
email: ______________________________________________________
Site Sub-Contractor
Company: __________________________________
Contact: _____________________ Phone: ________________________
Street: ______________________ Fax: ________________________
City, State Zip________________________________________________
email: ______________________________________________________
Site Sub-Contractor
Company: __________________________________
Contact: _____________________ Phone: ________________________
Street: ______________________ Fax: ________________________
City, State Zip________________________________________________
email: ______________________________________________________
SUNIGA ROAD
LUPINE
DRIVE
BLONDEL STREET
SUNIGA ROAD
LUPINE DRIVE
CONIFER STREET
PROPERTY BOUNDARY
PROPERTY BOUNDARY
PROPERTY BOUNDARY
PROPERTY
BOUNDARY/ROW
PROPERTY BOUNDARY
PROPERTY BOUNDARY
EX 40' WATERLINE
EASEMENT
EXISTING
STORM INLET
INSTALL GRAVEL
INLET FILTER
EXISTING
STORM INLET
INSTALL GRAVEL
INLET FILTER
EXISTING
STORM INLET
INSTALL GRAVEL
INLET FILTER
EXISTING
STORM INLET
INSTALL GRAVEL
INLET FILTER
EXISTING
STORM INLET
INSTALL
GRAVEL
INLET FILTER
EXISTING
STORM INLET
INSTALL
GRAVEL
INLET FILTER
EXISTING 66" RCP
STORM SEWER
EX 40' WATERLINE
EASEMENT
PROPERTY
BOUNDARY/ PROP
ROW
INSTALL VEHICLE
TRACKING PAD
(46' WIDE x 50' LONG)
INSTALL VEHICLE
TRACKING PAD
(32' WIDE x 50' LONG)
INSTALL VEHICLE
TRACKING PAD
(79' WIDE x 50' LONG)
EX SILT FENCE ALONG
THE WEST BOUNDARY
VAN
VAN
DS
DS DS
DS
DS
DS
DS
DS
DS
DS
RD
RD
RD
DS
DS
DS
RD
DS
DS
DS
DS DS
DS
DS
DS
DS
DS
DS
DS
RD
RD
RD
DS
DS
DS
RD
DS
DS
DS
DS
DS
DS
DS
RD
RD
RD
DS
DS
DS
DS DS
DS
DS
DS
DS
DS
DS
DS DS
DS
DS
DS
VAN
VAN
DS
DS DS
DS
DS
DS
DS
DS
DS
DS
RD
RD
RD
DS
DS
DS
RD
DS
DS
DS
DS DS
DS
DS
DS
DS
DS
DS
DS
RD
RD
RD
DS
DS
DS
RD
DS
DS
DS
DS
DS
DS
DS
RD
RD
RD
DS
DS
DS
DS DS
DS
DS
DS
DS
DS
DS
DS DS
DS
DS
DS
EROSION CONTROL NOTES AND DETAILS
EC-04
J.Gooch
J.Gooch
A.Willkomm
4
FOR THE MARKING OF UNDERGROUND
BEFORE YOU DIG, GRADE, OR EXCAVATE
CALL 2 BUSINESS DAYS IN ADVANCE
CENTER OF COLORADO
CALL UTILITY NOTIFICATION
1-800-922-1987
MEMBER UTILITIES.
UTILITY PLAN APPROVAL
City of Fort Collins, Colorado
www.herefordnrcd.com/Straw_Wattles.pdf) AND PER DETAILS AND INSTALLATION INSTRUCTIONS CALLED FOR ON THIS SHEET.
2. IF GRAVEL INLET FILTERS ARE USED, REFER TO "CURB INLET GRAVEL FILTER" DETAIL, THIS SHEET.
SHEET No:
CROWNE AT OLD TOWN NORTH
FORT COLLINS, COLORADO
PROJECT/ LOCATION:
DRAWING:
OF 5
CHECKED BY:
DESIGNED BY:
DRAWN BY:
REV. # DESCRIPTION OF REVISION: DATE: REVISED BY: APPROVED BY:
1
2
3
4
5
6
7
PRELIMINARY
NOT FOR CONSTRUCTION
project no: 501-003
date: 11/01/17
STRAW
WATTLE/ROCK
SOCK CHECK
DAM
www.herefordnrcd.com/Straw_Wattles.pdf
WOODEN
STAKE
STRAW (TYP)
WATTLE WOODEN
STAKE
(TYP)
EMBED
WATTLE/ROCK
SOCK FILTERS
3" TO 5" INTO
SOIL
EMBED
WATTLE/ROCK
SOCK 3" TO 5"
INTO SOIL
EROSION CONTROL NOTES AND DETAILS
EC-05
J.Gooch
J.Gooch
A.Willkomm
5
FOR THE MARKING OF UNDERGROUND
BEFORE YOU DIG, GRADE, OR EXCAVATE
CALL 2 BUSINESS DAYS IN ADVANCE
CENTER OF COLORADO
CALL UTILITY NOTIFICATION
1-800-922-1987
MEMBER UTILITIES.
UTILITY PLAN APPROVAL
City of Fort Collins, Colorado
SHEET No:
CROWNE AT OLD TOWN NORTH
FORT COLLINS, COLORADO
PROJECT/ LOCATION:
DRAWING:
OF 5
CHECKED BY:
DESIGNED BY:
DRAWN BY:
REV. # DESCRIPTION OF REVISION: DATE: REVISED BY: APPROVED BY:
1
2
3
4
5
6
7
PRELIMINARY
NOT FOR CONSTRUCTION
project no: 501-003
date: 11/01/17
SLOPE
INSTALLATION
DETAIL
Drawing Not To Scale
1. Prepare soil before installing rolled
erosion control products (RECPs),
including any necessary
application of lime, fertilizer, and
seed.
2. Begin at the top of the slope by
anchoring the RECPs in a
6"(15cm) deep X 6"(15cm) wide
trench with approximately 12"
(30cm) of RECPs extended beyond
the up-slope portion of the trench.
Anchor the RECPs with a row of
staples/stakes approximately 12"
(30cm) apart in the bottom of the
trench. Backfill and compact the
trench after stapling. Apply seed to
the compacted soil and fold the
remaining 12"(30cm) portion of
RECPs back over the seed and
compacted soil. Secure RECPs
4970
4968
4969
4968
4969
4970
4971
4972
4972
4972
4970
4969
4970
4969
4967
4968
4967
4968
4968
4969
4969
4967
4967
4968
4968
4969
4968
4968
4969
4969
4969
4970
4970
4971
4970
4971
4972
4972
4970
4970
4971
4970
4969
4968
4969
4967
4968
4970
4969
4969
4971
4971
4971
4971
4972
4971
4970
4968
4969
4966
Project: CROWNE AT OLD TOWN NORTH 501-003
Prepared By: CAS Date: 11/29/2017
CITY RESEEDING COST
Unit Total
Method Quantity Unit Cost Cost Notes
Reseed/mulch 14.63 ac $723 $10,577.49
Subtotal $10,577
Contingency 50% $5,289
Total $15,866
Notes: 1. A<=5 ac=$655/ac; A>5 ac=$615/ac.
EROSION CONTROL MEASURES
Unit Total
Number Method Quantity Unit Cost Cost Notes
Vehicle Tracking Mat 145 CY $30 $4,350
6 Gravel Filter 69 ea $300 $20,700
5 Straw Wattle Barrier 4 ea $150 $600
8 Silt Fence Barrier 5907 LF $2 $11,814
39 Hay or Straw Dry Mulch (1-5% slope) 14.63 ac $500 $7,315
Gravel Filter Rock Sock Filter 1896 LF $4 $7,584
Gravel Curb Check Bags 9 ea $40 $360
Subtotal $52,723
Contingency 50% $26,362
Total $79,085
Total Security $79,085
EROSION CONTROL COST ESTIMATE
4967
VAN
VAN
DS
DS DS
DS
DS
DS
DS
DS
DS
DS
RD
RD
RD
DS
DS
DS
RD
DS
DS
DS
DS DS
DS
DS
DS
DS
DS
DS
DS
RD
RD
RD
DS
DS
DS
RD
DS
DS
DS
DS
DS
DS
DS
RD
RD
RD
DS
DS
DS
DS DS
DS
DS
DS
DS
DS
DS
DS DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS DS DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS DS DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
RD
RD
RD
RD
RD
RD
DS
DS
DS
RD
RD
DS
DS
DS
DS
DS
DS
DS
DS
RD
RD RD
RD
RD
RD
DS
RD
DS
DS
DS
DS
RD
DS
DS
DS
DS
DS
DS
DS DS
DS
DS
DS
DS
DS
DS DS
FDC
FDC
FDC
FDC
FDC
FDC
FDC
FDC
FDC
OS1
0.26 0.97
OS1
OS2
0.12 1.00
OS2
OS4
0.44 1.00
OS6
0.57 1.00
1
2
2
3 4
5
7
8
9
10
12
13
11
14
15
16
17
18
19
20
21
22
23
OS3
0.62 0.96
OS5
0.96 0.88
24
25
26
27
28
OS3
OS4
OS5
OS6
14
0.65 1.00
3
0.79 1.00
26
0.02 0.90
25
0.02 0.84
1
0.52 0.88
2
0.07 0.73
4
0.76 1.00
5
0.14 0.49
27
0.11 0.63
7
0.65 0.80
8
0.69 0.86
9
0.19 0.68
10
1.12 1.00
11
0.25 1.00
12
0.74 0.93
13
0.86 0.97
15
1.84 0.82
16
1.02 0.98
17
0.14 0.63
18
0.27 1.00
19
0.37 0.85
20
0.39 1.00
21
0.21 0.78
22
0.18 1.00
23
0.18 0.40
24
0.03 0.54
6
0.40 1.00
6
28
0.48 0.76
PROP LID BASIN
PROP
LID BASIN
PROP
LID BASIN
PROP
LID BASIN
PROP
LID BASIN
CONIFER STREET
LUPINE
DRIVE
BLONDEL STREET
LUPINE DRIVE
JEROME STREET
LUPINE DRIVE
JEROME STREET
SUNIGA ROAD
SUNIGA ROAD
LEGEND
EXISTING CONTOURS
69 NEW INTERMEDIATE CONTOURS
70 NEW INDEX CONTOURS
PROPOSED FLOWLINE
EX RIGHT-OF-WAY/ PROPERTY BOUNDARY
0' 50' 100'
SCALE: 1" = 50'
ASPEN
PROPOSED DRAINAGE BASIN BOUNDARY
LINE
PROPOSED DRAINAGE BASIN ID
ACRES / 'C 100' VALUE
PROPOSED DRAINAGE DESIGN POINT
S
PROPOSED DRAINAGE BASIN SUMMARY TABLE:
DRAINAGE
BASIN
DESIGN
POINT
DRAINAGE
BASIN #
AREA
(acres)
'C100'
VALUE Q2 (cfs) Q100 (cfs)
0.52
0.07
0.79
0.76
0.14
0.40
0.65
0.69
0.19
1.12
0.25
0.74
0.86
0.65
1.84
1.02
0.14
0.27
0.37
0.39
0.21
0.18
0.18
0.03
0.02
0.02
0.11
0.48
0.26
0.12
0.62
0.44
0.96
0.57
DRAINAGE FLOW DIRECTION
PROPOSED STORM PIPE
EXISTING STORM PIPE & MANHOLE
1) THE DRAINAGE BASINS SHOWN ON THIS EXHIBIT WILL
BE CONVEYED TO THE NECCO STORM SEWER SYSTEM
AND ULTIMATELY TO THE NECCO REGIONAL DETENTION
POND. THE DEVELOPED SITE RUNOFF IS CONVEYED
TO THE THE NECCO STORM SEWER SYSTEM VIA
OVERLAND FLOW, PIPE AND INLET SYSTEMS, AND VIA
PROPOSED SWALE SYSTEMS. DRAINAGE DESIGN FOR
THE PROPOSED SITE IS IN ACCORDANCE WITH THE
AMENDMENT TO THE MASTER DEVELOPMENT
DRAINAGE PLAN FOR THE DRY CREEK BASIN. WATER
QUALITY AND DETENTION IS BEING PROVIDED IN THE
NECCO REGIONAL DETENTION POND.
2) PLEASE REFER TO THE RATIONAL METHOD
CALCULATIONS FOR COMBINED/ ATTENUATED FLOW
FROM COMBINED BASINS.
3) 12" OF CDOT CLASS 'A' BEDDING MATERIAL SHALL BE
PLACED UNDER ALL RIPRAP SHOWN.
4) ROOF DRAINS MAY DISCHARGE TO SURFACE AND/OR
TO UNDERGROUND STORM PIPES. THE LOCATION OF
ROOF DRAINS ARE DETAILED ON THE ROOF DRAIN
PLANS.
5) RUNOFF FROM THE SITE WILL DRAIN TO LOW
POINTS/INLETS, AND PASS THROUGH CURB CUTS,
SIDEWALK CHASES, AND SWALES BEFORE ENTERING
STORM PIPES, WHICH ULTIMATELY DISCHARGE TO THE
NECCO REGIONAL POND. POROUS PAVEMENT, LID
BASINS, AND RIPRAP AND GRASS LINED DRAINAGE
CHANNELS WILL ENHANCE INFILTRATION WITHIN THE
SITE LIMITS. SITE BMP'S WILL BE IMPLEMENTED TO
REDUCE SEDIMENT TRANSPORT OFFSITE AS SHOWN ON
THE FINAL EROSION CONTROL EXHIBIT.
6) ALL PROPOSED STORM DRAINAGE PIPES AND
STRUCTURES (OUTSIDE OF PLATTED ROW) WILL BE
PRIVATELY OWNED AND MAINTAINED BY THE OWNER
(CROWNE PARTNERS). THE NECCO STORM SEWER
SYSTEM AND STORM SEWER WITHIN PUBLIC ROW WILL
OWNED AND MAINTAINED BY THE CITY OF FORT
COLLINS.
7) OFFSITE BASINS OS3 - OS6 DRAIN OFFSITE TO THE
NECCO STORM SEWER SYSTEM. THE CAPACITY OF THE
SYSTEM TO CONVEY THE SITE FLOWS WAS VERIFIED IN
THE DRY CREEK MASTER PLAN EPA SWMM MODEL.
0.88
1
0.52
1
12
DRAINAGE BASIN EXHIBIT
C-012
NOTES:
RD
PROPOSED ROOF DRAIN AND STORM PIPE
UTILITY PLAN APPROVAL
City of Fort Collins, Colorado
0.88
0.73
1.00
1.00
0.49
1.00
0.80
0.86
0.68
1.00
1.00
0.93
0.97
1.00
0.82
0.98
0.63
1.00
0.85
1.00
0.78
1.00
0.40
0.54
0.84
0.90
0.63
0.76
0.97
1.00
0.96
1.00
0.88
1.00
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
OS1
OS2
OS3
OS4
OS5
OS6
1.03
0.11
1.99
2.04
0.16
1.06
1.15
1.3
0.28
2.99
0.66
1.56
1.91
1.69
2.86
1.89
0.20
0.68
0.71
0.91
0.38
0.43
0.14
0.04
0.04
0.05
0.16
0.83
0.52
0.28
1.29
1.05
1.67
1.32
4.51
0.47
7.88
7.60
0.70
3.99
5.21
5.90
1.25
11.11
2.48
6.81
8.32
6.51
14.07
9.14
0.87
2.64
3.12
3.92
1.64
1.80
0.65
0.15
0.18
0.21
0.71
3.63
2.46
1.18
5.97
4.36
8.15
5.72
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
OS1
OS2
OS3
OS4
OS5
OS6
J.Gooch
J.Gooch
J.Gooch
SHEET No:
CROWNE AT OLD TOWN NORTH
FORT COLLINS, COLORADO
PROJECT/ LOCATION:
DRAWING:
OF 41
CHECKED BY:
DESIGNED BY:
DRAWN BY:
REV. # DESCRIPTION OF REVISION: DATE: REVISED BY: APPROVED BY:
1
2
3
4
5
6
7
PRELIMINARY
NOT FOR CONSTRUCTION
project no: 501-003
date: 11/29/17
LID BASIN WITH UNDERDRAIN
POROUS PAVERS
over compacted soil with a row
of staples/stakes spaced
approximately 12"(30cm) apart
across the width of the RECPs.
3. Roll the RECPs (A) down or (B)
horizontally across the slope.
RECPs will unroll with appropriate
side against the soil surface. All
RECPs must be securely fastened
to soil surface by placing
staples/stakes in appropriate
locations as shown in the staple
pattern guide.
4. The edges of parallel RECPs must
be stapled with approximately 2" -
5" (5-12.5cm) overlap depending
on the RECPs type.
5. Consecutive RECPs spliced down
the slope must be end over end
(Shingle style) with an approximate
3"(7.5cm) overlap. Staple through
overlapped area, approximately
12"(30cm) apart across entire
RECPs width.
Drawn on: 5-4-17
Disclaimer:
The information presented herein is general design information only. For specific applications,
consult an independent professional for further design guidance.
2"-5"
(5-12.5cm)
3B
4
2
5
1
3A
12"(30cm)
6"
(15cm)
6"
(15cm)
*NOTE:
In loose soil conditions, the use of
staple or stake lengths greater than
6"(15cm) may be necessary to
properly secure the RECP's.
3"(7.5cm)
5401 St. Wendel - Cynthiana Rd.
Poseyville, IN 47633
PH: 800-772-2040
www.nagreen.com
CHANNEL
INSTALLATION
DETAIL
Drawing Not To Scale
1. Prepare soil before installing rolled
erosion control products (RECPs),
including any necessary application of
lime, fertilizer, and seed.
2. Begin at the top of the channel by
anchoring the RECPs in a 6"(15cm)
deep X 6"(15cm) wide trench with
approximately 12"(30cm) of RECPs
extended beyond the up-slope portion
of the trench. Use ShoreMax mat at the
channel/culvert outlet as supplemental
scour protection as needed. Anchor the
RECPs with a row of staples/stakes
approximately 12"(30cm) apart in the
bottom of the trench. Backfill and
compact the trench after stapling. Apply
seed to the compacted soil and fold the
remaining 12"(30cm) portion of RECPs
back over the seed and compacted soil.
Secure RECPs over compacted soil
with a row of staples/stakes spaced
approximately 12" apart across the
width of the RECPs.
3. Roll center RECPs in direction of water
flow in bottom of channel. RECPs will
unroll with appropriate side against the
soil surface. All RECPs must be
securely fastened to soil surface by
placing staples/stakes in appropriate
locations as shown in the staple pattern
guide.
4. Place consecutive RECPs end-over-end
(Shingle style) with a 4"-6" overlap. Use
a double row of staples staggered 4"
apart and 4" on center to secure
RECPs.
5. Full length edge of RECPs at top of side
slopes must be anchored with a row of
staples/stakes approximately 12"(30cm)
apart in a 6"(15cm) deep X 6"(15cm)
wide trench. Backfill and compact the
trench after stapling.
6. Adjacent RECPs must be overlapped
approximately 2"-5" (5-12.5cm)
(Depending on RECPs type) and
stapled.
7. In high flow channel applications a
staple check slot is recommended at 30
to 40 foot (9 -12m) intervals. Use a
double row of staples staggered
4"(10cm) apart and 4"(10cm) on center
over entire width of the channel.
8. The terminal end of the RECPs must be
anchored with a row of staples/stakes
approximately 12" (30cm) apart in a
6"(15cm) deep X 6"(15cm) wide trench.
Backfill and compact the trench after
stapling.
Drawn on: 5-4-17
Disclaimer:
The information presented herein is general design information only. For specific applications,
consult an independent professional for further design guidance.
2"-5"
(5-12.5cm)
6
2
4
12"(30cm)
6"
(15cm)
6"
(15cm)
4"-6"
(10-15cm)
8
6"
(15cm)
5 7
4"(10cm)
3
1
A
B
C
A
B C
NOTES:
*Horizontal staple spacing should be
altered if necessary to allow staples to
secure the critical points along the channel
surface.
**In loose soil conditions, the use of staple
or stake lengths greater than 6"(15cm) may
be necessary to properly secure the
RECP's.
CRITICAL POINTS
A. Overlaps and Seams
B. Projected Water Line
C. Channel Bottom/Side Slope Vertices
4"(10cm)
6"
(15cm)
5401 St. Wendel - Cynthiana Rd.
Poseyville, IN 47633
PH: 800-722-2040
www.nagreen.com
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS DS DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS DS DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
RD
RD
RD
RD
RD
RD
DS
DS
DS
RD
RD
DS
DS
DS
DS
DS
DS
DS
DS
RD
RD RD
RD
RD
RD
DS
RD
DS
DS
DS
DS
RD
DS
DS
DS
DS
DS
DS
DS DS
DS
DS
DS
DS
DS
DS DS
T
T
T
T
T
T
T
T
E E E E
E E E
E
E
E
E
E
E E E E
E E E
E
E
E E
E
E
E
E
E
E E
E
E
E
E
E
E E
E
E
E
E
E
E
E
E
E E
E E E E E
E
E
E
E
E E
E
E
E
E
E
E
E E E E
E E
E
E
E
E
E
E E E E
E
E
E E E
E
E
E
E
E
E E E
E
E
E
E
E
E
E
E
E E E E
E
E
E
E E
E
E
E
E E E
E
E E
E E
E E
E
E
E
E E E
E
E
E E
E E
E
E E
E E
E
E
E
E
E E E
E
E
E
E
E
E
E
E
T
E
E
E
E
E E
E E E E E
E
E
E
E
E
E
E
E E
E E E E
E
E
E
E E E
E E E
E E E E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E E E
E
T
E E
E
E E
E
E
E
E E E E
E
E
E
E
E
E
E
E
E E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
G
G G G
G
G G
G G
G
G
G
G
G
G
G
G
G
G G
G G
G
G
G
G
G
G
G
G G
G
G
G G
G
G
G
G
G G
G
G G
G
G
G
G
G
G
G G
G
G
G G
G
G
G
G
G G
G G
G
G
G
G
G G G G G G
G
G
G
G
G
G G
G
G
G
G
G G
G
SUNIGA ROAD
LUPINE
DRIVE
BLONDEL STREET
SUNIGA ROAD
LUPINE DRIVE
JEROME STREET
LUPINE DRIVE
JEROME STREET
PROPOSED BUILDING 4
PROPOSED
BUILDING 2
PROPOSED
BUILDING 1
PROPOSED
BUILDING 5
PROPOSED
BUILDING 3
PROPOSED
BUILDING 7
PROPOSED
BUILDING 8 PROPOSED
BUILDING 9
PROPOSED
BUILDING 6
CONIFER STREET
PROPERTY BOUNDARY
PROPERTY BOUNDARY
PROPERTY BOUNDARY
PROPERTY
BOUNDARY/ROW
PROPERTY BOUNDARY
PROPERTY BOUNDARY
EX 40' WATERLINE
EASEMENT
EXISTING 66" RCP
STORM SEWER
EX 40' WATERLINE
EASEMENT
PROPERTY
BOUNDARY/ PROP
ROW
PROPOSED
POROUS
PAVEMENT
PROPOSED
POROUS
PAVEMENT
PROPOSED
POROUS
PAVEMENT
PROPOSED
POROUS
PAVEMENT
8' x6.5'
EX SILT FENCE ALONG
THE WEST BOUNDARY
(1,276 LF)
INSTALL D50=12"
RIPRAP
PROTECTION
6' x8'
8' x5'
6' x15'
8' x5'
6' x6.5'
6' x5'
6' x5'
6' x5'
6' x5'
6' x6'
6' x4'
6' x4'
6' x5'
PROPOSED
POROUS
PAVEMENT
PROPOSED
POROUS
PAVEMENT
PROPOSED
POROUS
PAVEMENT
PROPOSED
POROUS
PAVEMENT
PROPOSED
POROUS
PAVEMENT
PROPOSED
POROUS
PAVEMENT
0' 50' 100'
SCALE: 1" = 50'
ASPEN
FINAL EROSION CONTROL PLAN
EC-03
J.Gooch
J.Gooch
C. Schwartz
3
FOR THE MARKING OF UNDERGROUND
BEFORE YOU DIG, GRADE, OR EXCAVATE
CALL 2 BUSINESS DAYS IN ADVANCE
CENTER OF COLORADO
1-CALL 800-UTILITY NOTIFICATION 922-1987
MEMBER UTILITIES.
UTILITY PLAN APPROVAL
City of Fort Collins, Colorado
NOTES
1) CONTRACTOR HAS PREVIOUSLY INSTALLED SILT FENCE FOR PRAIRIE DOG MITIGATION EFFORTS. EX SILT FENCE
SHALL BE MAINTAINED THROUGHOUT CONSTRUCTION ACTIVITIES. APPROXIMATE TOTAL LENGTH OF SILT FENCE:
EXISTING PERIMTER SILT FENCE AROUND SITE = 3,716 LF
PERIMETER SILT FENCE AROUND BUILDINGS = 5,783 LF
PERIMETER SILT FENCE AROUND LIDS = 596 LF
2) ALL DISTURBED AREAS ARE TO BE SEEDED AND MULCHED.
3) LID BASINS SHALL BE INSTALLED WHERE SHOWN AND WILL PROMOTE INFILTRATION, AS REQUIRED BY THE CITY OF
FORT COLLINS.
4) STOCK PILES SHALL NOT TO EXCEED 10' IN HEIGHT.
5) ALL OFFSITE AREAS DISTURBED DURING CONSTRUCTION ARE TO BE RE-VEGETATED AND RETURNED TO HISTORIC
CONDITION. STRAW WATTLES OR GRAVEL INLET FILTERS MAY BE INSTALLED (IF NECESSARY AND AS REQUIRED) ON
EXISTING, OFFSITE/DOWNSTREAM INLETS.
6) VEHICLE TRACKING PAD(S) LOCATIONS SHALL BE DETERMINED BY THE CONTRACTOR AND PRIOR TO CONSTRUCTION,
AND SHALL BE INSTALLED ACCORDINGLY.
7) SEE SHEET C-008 FOR EROSION CONTROL NOTES AND DETAILS.
SHEET No:
CROWNE AT OLD TOWN NORTH
FORT COLLINS, COLORADO
PROJECT/ LOCATION:
DRAWING:
OF 41
CHECKED BY:
DESIGNED BY:
DRAWN BY:
REV. # DESCRIPTION OF REVISION: DATE: REVISED BY: APPROVED BY:
1
2
3
4
5
6
7
PRELIMINARY
NOT FOR CONSTRUCTION
project no: 501-003
date: 11/29/17
LEGEND .
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS DS DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS DS DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
RD
RD
RD
RD
RD
RD
DS
DS
DS
RD
RD
DS
DS
DS
DS
DS
DS
DS
DS
RD
RD RD
RD
RD
RD
DS
RD
DS
DS
DS
DS
RD
DS
DS
DS
DS
DS
DS
DS DS
DS
DS
DS
DS
DS
DS DS
SUNIGA ROAD
LUPINE
DRIVE
BLONDEL STREET
SUNIGA ROAD
LUPINE DRIVE
JEROME STREET
LUPINE DRIVE
JEROME STREET
PROPOSED BUILDING 4
PROPOSED
BUILDING 2
PROPOSED
BUILDING 1
PROPOSED
BUILDING 5
PROPOSED
BUILDING 3
PROPOSED
BUILDING 7
PROPOSED
BUILDING 8 PROPOSED
BUILDING 9
PROPOSED
BUILDING 6
T
T
T
T
T
T
T
T
E E E E
E E E
E
E
E
E
E
E E E E
E E E
E
E
E E
E
E
E
E
E
E E
E
E
E
E
E
E E
E
E
E
E
E
E
E
E
E E
E E E E E
E
E
E
E
E E
E
E
E
E
E
E
E E E E
E E
E
E
E
E
E
E E E E
E
E
E E E
E
E
E
E
E
E E E
E
E
E
E
E
E
E
E
E E E E
E
E
E
E E
E
E
E
E E E
E
E E
E E
E E
E
E
E
E E E
E
E
E E
E E
E
E E
E E
E
E
E
E
E E E
E
E
E
E
E
E
E
E
T
E
E
E
E
E E
E E E E E
E
E
E
E
E
E
E
E E
E E E E
E
E
E
E E E
E E E
E E E E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E E E
E
T
E E
E
E E
E
E
E
E E E E
E
E
E
E
E
E
E
E
E E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
G
G G G
G
G G
G G
G
G
G
G
G
G
G
G
G
G G
G G
G
G
G
G
G
G
G
G G
G
G
G G
G
G
G
G
G G
G
G G
G
G
G
G
G
G
G G
G
G
G G
G
G
G
G
G G
G G
G
G
G
G
G G G G G G
G
G
G
G
G
G G
G
G
G
G
G G
G
CONIFER STREET
PROPERTY BOUNDARY
PROPERTY BOUNDARY
PROPERTY BOUNDARY
PROP PROPERTY
BOUNDARY/ROW
PROPERTY BOUNDARY
PROPERTY BOUNDARY
EXISTING
STORM INLET
INSTALL GRAVEL
INLET FILTER
EXISTING
STORM INLET
INSTALL GRAVEL
INLET FILTER
EXISTING
STORM INLET
INSTALL GRAVEL
INLET FILTER
EXISTING
STORM INLET
INSTALL GRAVEL
INLET FILTER
EXISTING
STORM INLET
INSTALL
GRAVEL
INLET FILTER
EXISTING
STORM INLET
INSTALL
GRAVEL
INLET FILTER
EXISTING 66" RCP
STORM SEWER
EX 40' WATERLINE
EASEMENT
PROPERTY
BOUNDARY/ PROP
ROW
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTERS
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL VEHICLE
TRACKING PAD
(46' WIDE x 50' LONG)
INSTALL VEHICLE
TRACKING PAD
(32' WIDE x 50' LONG)
INSTALL VEHICLE
TRACKING PAD
(79' WIDE x 50' LONG)
PROPOSED
POROUS
PAVEMENT
PROPOSED
POROUS
PAVEMENT
PROPOSED
POROUS
PAVEMENT
PROPOSED
POROUS
PAVEMENT
PROPOSED
POROUS
PAVEMENT
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
8' x6.5'
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
PROPOSED
STORM INLET
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL 18" STRAW
WATTLE CHECK DAMS
EX SILT FENCE ALONG
THE WEST BOUNDARY
(1,276 LF)
EX SILT FENCE ALONG
THE EAST BOUNDARY
(558 LF, WHERE
APPLICABLE)
INSTALL PROP SILT FENCE
ALONG THE SOUTH
BOUNDARY (952 LF)
EX SILT FENCE ALONG
THE NORTH BOUNDARY
(485 LF)
EXISTING STORM
INLET 355 FT EAST OF
TRACKING PAD
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
CURB CHECK BAGS
INSTALL GRAVEL CURB
CHECK BAGS
EACH SIDE OF STREET
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
CURB CHECK BAGS
IN EXISTING CURB
EXISTING STORM
INLETS ON LUPINE
DRIVE, 500 FT EAST
OF TRACKING PAD
INSTALL GRAVEL
INLET FILTERS
INSTALL GRAVEL
CURB CHECK BAGS
IN EXISTING CURB
150FT SPACING
PROPOSED
STORM INLET
INSTALL GRAVEL
INLET FILTER
PROPOSED
STORM INLET
INSTALL GRAVEL
INLET FILTER
PROPOSED
STORM INLET
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
ROCK SOCK (260 LF)
INSTALL GRAVEL ROCK
SOCK (194 LF)
INSTALL GRAVEL ROCK
SOCK (204 LF)
INSTALL GRAVEL ROCK
SOCK (222 LF)
INSTALL GRAVEL ROCK
SOCK (222 LF)
INSTALL GRAVEL ROCK
SOCK (222 LF)
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
EX SILT FENCE ALONG
THE EAST BOUNDARY
(387 LF, WHERE
APPLICABLE)
INSTALL D50=12"
RIPRAP
PROTECTION
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
ROCK SOCK (270 LF)
INSTALL GRAVEL
INLET FILTER
6' x8'
8' x5'
6' x15'
8' x5'
6' x6.5'
6' x5'
6' x5'
6' x5'
6' x5'
6' x6'
6' x4'
6' x4'
EX 40' WATERLINE
EASEMENT NOTE: VEHICLE TRACKING PAD
MAY NEED TO BE INSTALLED AT
PROPOSED SOUTH ENTRANCES
IF CITY OF FORT COLLINS IS
INSTALLING SUNIGA
IMPROVEMENTS PRIOR TO SITE
WORK.
PROP RIGHT OF WAY
PROPERTY
BOUNDARY/ PROP
ROW
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
PROPOSED
POROUS
PAVEMENT
INSTALL GRAVEL
INLET FILTER
PROPOSED
POROUS
PAVEMENT
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL ROCK
SOCK (82 LF)
INSTALL GRAVEL ROCK
SOCK (68 LF)
INSTALL GRAVEL ROCK
SOCK (132 LF)
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
INLET FILTER
INSTALL 18" STRAW
WATTLE CHECK DAM
INSTALL 18" STRAW
WATTLE CHECK DAM
LIMITS OF
DISTURBANCE
LIMITS OF
DISTURBANCE
LIMITS OF
DISTURBANCE
LIMITS OF
DISTURBANCE
0' 50' 100'
SCALE: 1" = 50'
ASPEN
INTERIM EROSION CONTROL PLAN
ec-02
J.Gooch
J.Gooch
T.Willkomm
2
FOR THE MARKING OF UNDERGROUND
BEFORE YOU DIG, GRADE, OR EXCAVATE
CALL 2 BUSINESS DAYS IN ADVANCE
CENTER OF COLORADO
1-CALL 800-UTILITY NOTIFICATION 922-1987
MEMBER UTILITIES.
UTILITY PLAN APPROVAL
City of Fort Collins, Colorado
NOTES
1) CONTRACTOR HAS PREVIOUSLY INSTALLED SILT FENCE FOR PRAIRIE DOG MITIGATION EFFORTS. EX SILT FENCE
SHALL BE MAINTAINED THROUGHOUT CONSTRUCTION ACTIVITIES. APPROXIMATE TOTAL LENGTH OF SILT FENCE:
EXISTING PERIMTER SILT FENCE AROUND SITE = 3,314 LF
PERIMETER SILT FENCE AROUND BUILDINGS = 5,741 LF
PERIMETER SILT FENCE AROUND LID = 166 LF
2) ALL DISTURBED AREAS ARE TO BE SEEDED AND MULCHED.
3) LID BASINS SHALL BE INSTALLED WHERE SHOWN AND WILL PROMOTE INFILTRATION, AS REQUIRED BY THE CITY OF
FORT COLLINS.
4) STOCK PILES SHALL NOT TO EXCEED 10' IN HEIGHT.
5) ALL OFFSITE AREAS DISTURBED DURING CONSTRUCTION ARE TO BE RE-VEGETATED AND RETURNED TO HISTORIC
CONDITION. STRAW WATTLES OR GRAVEL INLET FILTERS MAY BE INSTALLED (IF NECESSARY AND AS REQUIRED) ON
EXISTING, OFFSITE/DOWNSTREAM INLETS.
6) VEHICLE TRACKING PAD(S) LOCATIONS SHALL BE DETERMINED BY THE CONTRACTOR AND PRIOR TO CONSTRUCTION,
AND SHALL BE INSTALLED ACCORDINGLY.
7) SEE SHEET C-008 & C-009 FOR EROSION CONTROL NOTES AND DETAILS.
SHEET No:
CROWNE AT OLD TOWN NORTH
FORT COLLINS, COLORADO
PROJECT/ LOCATION:
DRAWING:
OF 5
CHECKED BY:
DESIGNED BY:
DRAWN BY:
REV. # DESCRIPTION OF REVISION: DATE: REVISED BY: APPROVED BY:
1
2
3
4
5
6
7
PRELIMINARY
NOT FOR CONSTRUCTION
project no: 501-003
date: 11/01/17
O/C TRAIL.
LEGEND .
O/C TRAIL.
(1,276 LF)
EX SILT FENCE ALONG
THE EAST BOUNDARY
(558 LF, WHERE
APPLICABLE)
INSTALL PROP SILT FENCE
ALONG THE SOUTH
BOUNDARY (769 LF)
EX SILT FENCE ALONG
THE NORTH BOUNDARY
(485 LF)
EXISTING STORM
INLET 355 FT EAST OF
TRACKING PAD
INSTALL GRAVEL
INLET FILTER
INSTALL GRAVEL
CURB CHECK BAGS
INSTALL GRAVEL CURB
CHECK BAGS
EACH SIDE OF STREET
INSTALL GRAVEL
CURB CHECK BAGS
IN EXISTING CURB
EXISTING STORM
INLETS ON LUPINE
DRIVE, 500 FT EAST
OF TRACKING PAD
INSTALL GRAVEL
INLET FILTERS
INSTALL GRAVEL
CURB CHECK BAGS
IN EXISTING CURB
150FT SPACING
EX SILT FENCE ALONG
THE EAST BOUNDARY
(387 LF, WHERE
APPLICABLE)
NOTE: VEHICLE TRACKING PAD
MAY NEED TO BE INSTALLED AT
PROPOSED SOUTH ENTRANCES
IF CITY OF FORT COLLINS IS
INSTALLING SUNIGA
IMPROVEMENTS PRIOR TO SITE
WORK.
EX SILT FENCE ALONG
THE WEST BOUNDARY
(1,276 LF)
0' 50' 100'
SCALE: 1" = 50'
ASPEN
INITIAL EROSION CONTROL PLAN
EC-01
J.Gooch
J.Gooch
C. Schwartz
1
FOR THE MARKING OF UNDERGROUND
BEFORE YOU DIG, GRADE, OR EXCAVATE
CALL 2 BUSINESS DAYS IN ADVANCE
CENTER OF COLORADO
1-CALL 800-UTILITY NOTIFICATION 922-1987
MEMBER UTILITIES.
UTILITY PLAN APPROVAL
City of Fort Collins, Colorado
NOTES
1) CONTRACTOR HAS PREVIOUSLY INSTALLED SILT FENCE FOR PRAIRIE DOG MITIGATION EFFORTS. EX SILT FENCE
SHALL BE MAINTAINED THROUGHOUT CONSTRUCTION ACTIVITIES. APPROXIMATE TOTAL LENGTH OF SILT FENCE:
EXISTING PERIMTER SILT FENCE AROUND SITE = 3,716 LF
PERIMETER SILT FENCE AROUND BUILDINGS = 5,783 LF
PERIMETER SILT FENCE AROUND LIDS = 596 LF
2) STOCK PILES SHALL NOT TO EXCEED 10' IN HEIGHT.
3) ALL OFFSITE AREAS DISTURBED DURING CONSTRUCTION ARE TO BE RE-VEGETATED AND RETURNED TO HISTORIC
CONDITION. STRAW WATTLES OR GRAVEL INLET FILTERS MAY BE INSTALLED (IF NECESSARY AND AS REQUIRED) ON
EXISTING, OFFSITE/DOWNSTREAM INLETS.
4) VEHICLE TRACKING PAD(S) LOCATIONS SHALL BE DETERMINED BY THE CONTRACTOR AND PRIOR TO CONSTRUCTION,
AND SHALL BE INSTALLED ACCORDINGLY.
5) SEE SHEET EC-04 FOR EROSION CONTROL NOTES AND DETAILS.
LEGEND .
SHEET No:
CROWNE AT OLD TOWN NORTH
FORT COLLINS, COLORADO
PROJECT/ LOCATION:
DRAWING:
OF 5
CHECKED BY:
DESIGNED BY:
DRAWN BY:
REV. # DESCRIPTION OF REVISION: DATE: REVISED BY: APPROVED BY:
1
2
3
4
5
6
7
PRELIMINARY
NOT FOR CONSTRUCTION
project no: 501-003
date: 11/01/17
O/C TRAIL.
O/C TRAIL.