HomeMy WebLinkAboutCROWNE AT SUNIGA - FDP230023 - SUBMITTAL DOCUMENTS - ROUND 1 - STORMWATER MANAGEMENT PLAN
STORMWATER MANAGEMENT PLAN
THE CROWNE AT SUNIGA
FORT COLLINS, COLORADO
THURSDAY, NOVEMBER 16, 2023
Project Number: 1893-001
NORTHERNENGINEERING.COM
970.221.4158
FORT COLLINS
GREELEY
NORTHERNENGINEERING.COM | 970.221.4158 SWMP: THE CROWNE AT SUNIGA
FORT COLLINS | GREELEY
November 16, 2023
City of Fort Collins
Stormwater Development Review
700 Wood Street
Fort Collins, CO 80521
RE: STORMWATER MANAGEMENT PLAN
THE CROWNE AT SUNIGA
To Whom It May Concern:
Northern Engineering Services, Inc. is pleased to submit this Stormwater Management Plan for The Crowne at
Suniga project. This report outlines Best Management Practices (BMPs) to be implemented with the proposed
construction to minimize potential pollutants in stormwater discharges.
We have prepared this report to accompany the Colorado Department of Public Health and Environment
General Permit for Stormwater Discharge Associated with Construction Activities (aka, Stormwater Discharge
Permit or SDP). The General Permit No. for this SDP is (to be filled-in by permittee), and the Certification No. for
this SDP is (to be filled-in by permittee). The Permit Certification is effective beginning (to be filled-in by
permittee), and initial certification expires (to be filled-in by permittee). A copy of the issuance cover letter can
be found in Appendix D of this document (to be filled-in by permittee).
Please note this Stormwater Management plan (including the Site Maps) is not a static document. It is a dynamic
device that should be kept current and logged as construction occurs. As such, this version was prepared to
facilitate initial plan approvals and permits but does not necessarily reflect the final version or the transitions
throughout the construction process. As the site develops and changes, the contractor is expected and
encouraged to change the content, so the SWMP works as effectively and efficiently as possible. It shall be the
responsibility of the SWMP Administrator and/or the permit holder (or applicant thereof) to ensure the plan is
properly maintained and followed.
If you should have any questions or comments as you review this report, please feel free to contact us at your
convenience.
Sincerely,
NORTHERN ENGINEERING SERVICES, INC.
Jacob O’Banion, EI BLAINE MATHISEN, PE
Project Engineer Project Engineer
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TABLE OF CONTENTS
1.0 PROJECT DESCRIPTIONS AND NATURE OF CONSTRUCTION ..............................................1
1.1 EXISTING SITE DESCRIPTION .................................................................................................................. 1
1.2 NATURE OF CONSTRUCTION ACTIVITY ................................................................................................... 1
1.3 SITE DISTURBANCE ................................................................................................................................. 2
1.4 EXISTING TOPOGRAPHIC AND SOIL DATA .............................................................................................. 2
1.5 RECEIVING WATERS ................................................................................................................................. 3
1.6 EXISTING SITE CONDITIONS AND VEGETATION ...................................................................................... 3
1.7 EXISTING GROUNDWATER ....................................................................................................................... 3
1.8 EXISTING GROUND CONTAMINATION ..................................................................................................... 3
2.0 PROPOSED CONSTRUCTION ACTIVITIES .........................................................................3
2.1 SEQUENCE OF MAJOR ACTIVITIES .......................................................................................................... 3
3.0 GENERAL REQUIREMENTS ............................................................................................3
3.1 OBJECTIVES ............................................................................................................................................. 3
3.2 SMWP AVAILABILITY................................................................................................................................. 4
3.3 DEFINITIONS ............................................................................................................................................ 4
3.4 ADDITIONAL PERMITTING ....................................................................................................................... 4
4.0 ENVIRONMENTAL IMPACT ............................................................................................4
5.0 POTENTIAL POLLUTION SOURCES .................................................................................4
5.1 DISTURBED AND STORED SOILS ............................................................................................................. 5
5.2 VEHICLE TRACKING OF SEDIMENT .......................................................................................................... 5
5.3 MANAGEMENT OF CONTAMINATED SOILS .............................................................................................. 6
5.4 LOADING AND UNLOADING OPERATIONS............................................................................................... 6
5.5 OUTDOOR STORAGE OF CONSTRUCTION SITE MATERIALS, BUILDING MATERIALS, CHEMICALS, ETC.
.................................................................................................................................................................. 6
5.6 BULK STORAGE OF MATERIALS ............................................................................................................... 7
5.7 VEHICLE AND EQUIPMENT MAINTENANCE AND FUELING ...................................................................... 7
5.8 SIGNIFICANT DUST OR PARTICULATE GENERATING PROCESSES ......................................................... 7
5.9 ROUTING MAINTENANCE ACTIVITIES INVOLVING FERTILIZER, PESTICIDES, DETERGENTS, FUELS,
SOLVENTS, OILS ...................................................................................................................................... 7
5.10 ON-SITE WASTE MANAGEMENT PRACTICES ........................................................................................... 8
5.11 CONCRETE TRUCK/EQUIPMENT WASHING ............................................................................................ 8
5.12 DEDICATED ASPHALT AND CONCRETE BATCH PLANTS ......................................................................... 9
5.13 NON-INDUSTRIAL WASTE SOURCES SUCH AS WORKER TRASH AND PORTABLE TOILETS ................... 9
5.14 SAW CUTTING AND GRINDING ................................................................................................................. 9
5.15 MATERIAL HANDLING AND SPILL PREVENTION .................................................................................... 10
5.16 NON-STORMWATER DISCHARGES, INCLUDING CONSTRUCTION DEWATERING NOT COVERED
UNDER THE CONSTRUCTION DEWATERING DISCHARGES GENERAL PERMIT AND WASH WATER THAT
MAY CONTRIBUTE TO POLLUTANTS TO THE MS4 ................................................................................ 10
6.0 STORMWATER MANAGEMENT CONTROLS ..................................................................... 11
6.1 SWMP ADMINISTRATOR......................................................................................................................... 11
6.2 OWNER INFORMATION .......................................................................................................................... 11
6.3 BEST MANAGEMENT PRACTICES (BMPS) FOR STORMWATER POLLUTION PREVENTION ................... 11
6.4 STRUCTURAL PRACTICES FOR EROSION AND SEDIMENT CONTROL ................................................... 12
6.5 NON-STRUCTURAL PRACTICES FOR EROSION AND SEDIMENT CONTROL .......................................... 14
6.6 PHASED BMP INSTALLATION ................................................................................................................ 16
6.7 BMP INSPECTION ................................................................................................................................... 17
6.8 BMP MAINTENANCE ............................................................................................................................... 18
6.9 RECORD KEEPING .................................................................................................................................. 18
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TABLE OF CONTENTS
7.0 FINAL STABILIZATION AND LONG-TERM STORMWATER MANAGEMENT ............................. 19
7.1 FINAL STABILIZATION ............................................................................................................................ 19
7.2 LONG-TERM STORMWATER MANAGEMENT .......................................................................................... 20
8.0 ADDITIONAL SWMP AND BMP RESOURCES .................................................................... 21
9.0 REFERENCES ............................................................................................................ 21
FIGURES AND TABLES
FIGURE 1 – VICINITY MAP.................................................................................................................................... 1
TABLE 1 – CONSTRUCTION ACTIVITIES .................................................. ERROR! BOOKMARK NOT DEFINED.
TABLE 2 – PRELIMINARY PERMIT AND CONSTRUCTION SCHEDULE ............................................................... 16
TABLE 3 - NATIVE GRASS SEED MIX .................................................................................................................. 20
APPENDICES
APPENDIX A – SITE MAPS
APPENDIX B – EROSION CONTROL DETAILS
APPENDIX C – LANDSCAPE PLAN
APPENDIX D – COPIES OF PERMITS/APPLICATIONS
APPENDIX E – INSPECTION LOGS
APPENDIX F – CONTRACTOR INSERTS (AS NEEDED)
APPENDIX G – CONTRACTOR INSERTS (AS NEEDED)
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1.0 PROJECT DESCRIPTIONS AND NATURE OF CONSTRUCTION
1.1 EXISTING SITE DESCRIPTION
The Crowne at Suniga project site is located in the southwest quarter of Section 6, Township 7 North,
Range 68 West of the 6th Principal Meridian, City of Fort Collins, County of Larimer, State of Colorado.
More specifically it is ±11.07-acres of land, bound on the east by Lemay Avenue, on the west by
Lindenmeier Road, and the south by Suniga Road.
1.2 NATURE OF CONSTRUCTION ACTIVITY
The project includes the construction of 6 multi-family buildings containing a total of 260 units. A
clubhouse, concrete drive aisles, sidewalks, and landscaping will also be constructed as a part of the
project. Standard water quality, LID, and all associated storm infrastructure will be provided with this
project. Underground detention will be provided on-site. Utilities will be installed with the construction
of The Crowne at Suniga.
Figure 1 – Vicinity Map
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1.3 SITE DISTURBANCE
The site disturbance will occur across roughly 11.87 acres. It is recommended that existing site condition
photos be taken prior to the demolition.
CALCULATIONS CHART
TOTAL DISTURBED PROJECT AREA 11.87 ACRES
TOTAL "ONSITE" AREA OF DISTURBANCE 11.07 ACRES
TOTAL "OFFSITE" AREA OF DISTURBANCE 0.80 ACRES
TOTAL STORAGE/STAGING AREA N/A ACRES
TOTAL HAUL ROADS AREA N/A
CONSTRUCTION VEHICLE TRAFFIC AREA N/A
EST. PERCENT OF PROJECT AREA EXPOSED 100%
EST. PERCENT VEGETATIVE COVER ~2.5% DENSITY
EXISTING SOIL TYPE C
APPROX. GROUNDWATER DEPTH 7 FEET
NUMBER OF PHASES W/ PROJECT N/A
TOTAL VOLUME OF IMPORTED (+) / EXPORTED (-) MATERIALS CUB. YD.
TOTAL AREA OF STOCKPILING OF FILL OR BORROW AREAS OFF SITE SQ. FEET
STEEPEST SLOPE 4:01 H:V
DISTANCE FROM A RIPARIAN AREA OR SENSITIVE AREA N/A FEET
1.4 EXISTING TOPOGRAPHIC AND SOIL DATA
In order to complete the associated construction plans, a topographical survey of the site was
completed. This survey consisted of field measurements made by Majestic Surveying in October 2022.
A NRCS Custom Soil Resource Report of the property indicates that the soil on site is composed of
Loveland clay loam (0-1% slopes), Nunn clay loam (1-3% slopes), and Fort Collins loam (0-3% slopes). All
of which are considered somewhat poorly drained and belong to hydrologic Soil Group C.
NRCS indicates a wind erodibility rating of 6 (of a scale of 1 to 8, 1 is most susceptible to erosion), and as
such this site does not have a high potential for wind erosion. NRCS indicates an erosion factor, K, of
0.28 (range of 0.02-0.69, 0.69 being more susceptible to sheet and rill erosion). As such, this site has a
moderate susceptibility to sheet and rill erosion.
The existing on-site runoff generally drains from northwest to southeast across flat grades (e.g., <2.00%)
into either North Lemay Avenue or an area inlet located in the southeast corner of the site, along the
southern property boundary. Runoff leaving the east side of the site is routed to a 15’ Type R inlet on the
west side of North Lemay Avenue, just north of East Suniga Road. From there, runoff is then routed via a
24” RCP storm drain to the NECCO Backbone, Storm Line A1, which outfalls into the Vine De tention
Pond. Runoff leaving the southern side of the site is routed to an area inlet via a swale that runs west to
east along the north side of East Suniga Road. Runoff is then routed to the NECCO Backbone, Storm Line
A1, via an 18” RCP storm drain. Both the Vine Detention Pond and Storm Line A1 of the NECCO Backbone
are defined in the North East College Corridor Outfall (NECCO) Designing Report, dated August 2009.
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1.5 RECEIVING WATERS
The Crowne at Suniga will outfall into Storm Line A1 of the NECCO Backbone which outfalls into the Vine
Detention Pond.
1.6 EXISTING SITE CONDITIONS AND VEGETATION
The site is currently vacant with native grasses.
There is not a significant amount of grade change on the site.
The existing site vegetation consists of native grasses. It is highly recommended that pre-construction
photos be taken to clearly document vegetative conditions prior to any disturbance activities.
1.7 EXISTING GROUNDWATER
Groundwater depth was measured onsite in June of 2022 by Earth Engineering Consultants with the
borings at various locations spread throughout the property (see attached Subsurface Exploration
Report). At the time of measurement (June 1, 2022), groundwater was roughly between 8’ and 8 1/4'
below existing elevations.
1.8 EXISTING GROUND CONTAMINATION
No existing groundwater contamination has been identified at this time.
2.0 PROPOSED CONSTRUCTION ACTIVITIES
2.1 SEQUENCE OF MAJOR ACTIVITIES
To complete the project, many basic categories of construction activity will take place. The first part will
be the removal and replacement of the existing asphalt pavement along Lindenmeier Road. Additional
asphalt and concrete removal will occur along Lemay Avenue. Portions of sidewalk, curb and gutter are
to be replaced along Lemay with the construction of a raised median. Once the existing pavements
marked for demo have been removed and utilities have been tied into existing systems, the topsoil and
native grasses that are currently on-site will be removed. Following topsoil stripping, rough grading of
the proposed lot will commence. Next, utility installation including sanitary sewer, water main and
storm sewer with underground detention. Construction of the proposed buildings is expected to begin
once the storm sewer is in place. New curb/gutter, paving, and sidewalks on-site are expected to begin
after the foundations of the buildings are in place and will coincide with building construction. The final
stages of site construction will be fine grading of the areas mentioned above, and the installation of
landscaping/seeding throughout the project. The sequencing is an initial best guess and is subject to
change at the Contractor’s discretion.
This project is proposed to be built in one phase.
The import of earthwork is expected.
3.0 GENERAL REQUIREMENTS
3.1 OBJECTIVES
The objective of a Stormwater Management Plan (SWMP) is to identify all potential sources of pollution
likely to occur as a result of construction activity associated with the site construction and to describe
the practices that will be used to reduce the pollutants in stormwater discharges from the site. The
SWMP must be completed and implemented at the time the project breaks ground and revised as
necessary as construction proceeds to accurately reflect the conditions and practices at the site.
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This report summarizes the Stormwater Management Plan for the construction activity that will occur
with The Crowne at Suniga in Fort Collins, CO. This plan has been prepared according to regulations of
the Colorado Department of Public Health and Environment (CDPHE), Water Quality Control Division.
This report has been provided to meet the requirements of the City of Fort Collins Municipal Code §26-
498 on water quality control.
3.2 SMWP AVAILABILITY
This report is intended to remain on the construction site to allow for maintenance and inspection
updates and for review during inspection.
3.3 DEFINITIONS
BMP – Best Management Practice encompassing a wide range of erosion and sediment control practices,
both structural and non-structural in nature, intended to reduce or eliminate any possible water quality
impacts from stormwater leaving a construction site.
Erosion Control BMPs – Practices that PREVENT the erosion of soil, such as minimizing the amount of
disturbed area through phasing, temporary stabilization, and preserving existing vegetation.
Sediment Control BMPs – Practices to REMOVE sediment from run-off, such as sediment basins, silt
fence, or inlet protection.
Non-structural BMPs – The implementation of methods, practices, and procedures to minimize water
quality impacts, such as the preservation of natural vegetation, preventive maintenance, and spill
response procedures.
Structural BMPs – Physical devices that prevent or minimize water quality impacts, such as sediment
basins, inlet protection, or silt fence.
3.4 ADDITIONAL PERMITTING
As mentioned above, this Stormwater Management Plan is associated with the Colorado Department of
Public Health and Environment Stormwater Permit that is issued by the Water Quality Control Division of
the CDPHE. Additional Environmental permitting not described in this report may be required as a part
of this project. An example is the Construction Dewatering Permit for groundwater. Another example is
the Air Pollution Emission Notice (APEN). The CDPHE website contains links to both of these permits, a s
well as many other potential permits. The Contractor is responsible for ensuring the proper permits are
acquired.
4.0 ENVIRONMENTAL IMPACT
There are no known environmental impacts to endangered species or other environmentally sensitive
features that have been identified in this project area.
5.0 POTENTIAL POLLUTION SOURCES
As is typical with most construction sites, there are several potential pollution sources that could affect
water quality. It is not possible for this report to identify all materials used or stored on the construction
site. It is the sole responsibility of the contractor to identify and properly handle all materials that are
potential pollution sources. Likely pollution sources are marked “YES,” unlikely pollution sources are
marked “NO.” Detailed descriptions of each source are also provided for additional reference. Please
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note that not all items with a detailed description are present in the project, and there could be
additional pollution sources that are not listed that must be addressed by the Contractor.
• YES - Disturbed and stored soils
• YES - Vehicle tracking of soils and sediment
• NO - Management of contaminated soils
• YES - Loading and unloading operations
• YES - Outdoor storage of construction site materials, building materials, fertilizers, chemicals, etc.
• NO - Bulk Storage of Materials
• YES - Vehicle and equipment maintenance and fueling
• YES - Significant dust or particulate generating processes
• YES - Routine maintenance activities involving fertilizers, pesticides, detergents, fuels, solvents,
oils, etc.
• YES - On-site waste management practices (waste piles, dumpsters, etc.)
• YES - Concrete truck/equipment washing
• NO - Dedicated asphalt and concrete batch plants
• YES - Non-industrial waste sources, such as worker trash and portable toilets
• YES - Saw Cutting and Grinding
• YES - Material Handling and Spill Prevention
• NO - Non-Stormwater Discharges including construction dewatering not covered under the
Construction Dewatering Discharges general permit and wash water that may contribute to
pollutants to the MS4
5.1 DISTURBED AND STORED SOILS
Approximately 11.87 acres of soil will be disturbed with the Construction Activities. Once soils have been
disturbed, they do not retain the same compaction as in their native state, therefore surface runoff can
cause more soil erosion than was historically observed. In the event that these erosion control practices
do not keep sediment on site a structural barrier (silt fence) will be used and is called out for on the
perimeter. If soil manages to migrate from the disturbed areas onto the hard surfaces, it will be swept or
scraped (street sweeping) to prevent the migration of sediment. In case that sediment is washed away
too quickly the curb inlets and Stormtech chambers will need protection (rock sock style inlet
protection).
Soil stockpiles are expected on this site. Stockpiles in the same respect do not retain the same
compaction and are more susceptible to soil erosion. Stockpiles on this site shall be placed in or near the
center of the site and away from any drainage swales to not require perimeter run off controls
(Materials/Site Management Control). The stockpile will be kept loose, not compacted, and watered as
needed to prevent dust issues (site watering). The stockpile will be monitored for signs of erosion
displacement and sediment accumulation and if conditions warrant it, the stockpile will be structurally
covered or if it is going to sit a long while will be reseeded (temporary seeding).
5.2 VEHICLE TRACKING OF SEDIMENT
Vehicle tracking of sediment may occur throughout the construction process and along all areas where
the pavement meets the disturbed dirt. This occurs most often after any melt off or rain conditions when
mud collects on vehicles tires and is tracked out onto the road consequently leaving site. This increases
the possibility of sediment discharging to the storm system. To prevent tracking, access to the site will
be limited to construction entrances (vehicle tracking pads to be installed) on the northeast side of the
site and northwest side of the site. Vehicle access will be limited on muddy days (site management
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control), in this case parking will be kept to the stabilized staging area. The tracking pad will be
monitored visually every day and if track-out becomes a significant problem a larger or more robust
tracking pad may be installed. Otherwise, all track-out that reaches the street will be scraped and swept
(street sweeping). Secondary controls at the closest affected inlets will have protection (inlet protection)
to capture sediment not swept up in a timely manner.
Additional measures can be taken to minimize and control sediment discharges from the site due to
vehicle tracking. These measures can include fencing around the site to control access points. The use of
gravel parking areas and wash racks can also be implemented to ensure minimal vehicle tracking from
the site.
5.3 MANAGEMENT OF CONTAMINATED SOILS
All data about the site shows that there is no known contamination on the site. If encountered, the
contractor will have the material stored in a covered area (materials management control) as to not mix
with the stormwater until the material can be identified and proper classification and disposal methods
can be determined in accordance with the various waste laws and with good construction safety and
practices.
5.4 LOADING AND UNLOADING OPERATIONS
There is not anticipated to be a significant amount of export leaving the site.
During this project there will be a diverse amount of loading and unloading. The foundation workers will
have to deliver forms to the site and deliver premixed concrete. Landscapers will have to pile the
materials on site to complete the landscape work. Though the loading and loading vehicles will be
contributing to the track out of materials, depending on the material being delivered to the site they may
have a significant spill potential. Where the trailers must access the site an attempt will be made to keep
the vehicle on the VTC or other stabilized storage areas. When loading and unloading is occurring,
depending on the materials, there may be an increased problem of containers being dropped,
punctured, or broken. These off-loading activities will be located away from storm drains and will have
nearby spill kits accessible. Spills on site will be addressed using spill prevention and response
procedures.
5.5 OUTDOOR STORAGE OF CONSTRUCTION SITE MATERIALS, BUILDING MATERIALS,
CHEMICALS, ETC.
It is anticipated that inert material like wood, tiles, and stone will be stored on site and outside in the
elements. It is also anticipated that materials that do not weather well (cement, mortar, etc.) will also be
located outside. Chemicals are not anticipated to be left outside. As the inert materials have a lower
potential to leave the site they will be monitored during inspection to make sure they are not being
impacted by the exposure to the elements (site management control). The materials that will need
added attention are the cements and mortars as they quickly mix with water and cause pollution issues.
These materials when not stored inside will be placed on pallets to get above potential surface runoff
and covered with tarps or plastic to prevent mixing with stormwater (materials management control).
Very small quantities of chemical are needed to contaminate stormwater so the fertilizers, paints, form
oils, petroleum products, and other typical chemicals, will be stored in the construction CONEX box,
trailers, vehicles, or the like out of contact with precipitation (materials management control). If not
stored in a location as described, secondary containment will be required. The contractor shall clearly
designate site areas for staging and storage of building materials.
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5.6 BULK STORAGE OF MATERIALS
This site is not expected to store bulk liquid chemicals of more than 55-gallon drums. If this site does
have the need to store liquid chemicals the following procedure should be followed.
These materials should be stored in an area that if a rupture would occur, it would be contained. The
area will need to be located away from the drainage areas and area inlets (site management / materials
management). The containers will be stored in secondary containment area with a fence so that if a spill
were to happen, it would pool in the bottom of the area and be contained.
5.7 VEHICLE AND EQUIPMENT MAINTENANCE AND FUELING
Based on the size of the site and the duration of activities vehicle fueling and vehicle maintenance is
highly likely. As fueling and equipment maintenance usually result in small spills of petroleum products
it is important to monitor these activities carefully. (site management control) Some grading companies
will employee a fuel truck to fill the heavy equipment on site or require the maintenance of a broken
machine. In those cases where the vehicle is not able to be maintained off site, these activities will be
done in the least detrimental way possible. The maintenance and fueling will be located as far from
stormwater features as possible and at least 50 feet from a stormwater feature (site
management/materials management). The fueling activity will have spill materials nearby and a bucket
or other container and shovel located nearby to hang a hose after filling to catch drips, and to scoop up
any dirt that inadvertently mixed with the soil (materials management). That container will have a lid
and be disposed of when the activity is completed. The maintenance work will be done on a tarp or other
material to prevent the residual oils and greases from mixing with the dirt (materials management). A
clearly designated on-site fueling and maintenance area is suggested.
5.8 SIGNIFICANT DUST OR PARTICULATE GENERATING PROCESSES
This project will result in earth moving activities, street sweeping, and track -out and carry out, bulk
materials transport, and saw cutting. As these activities will result in offsite transport of atmospheric
pollution reasonable precautions shall be taken. The project will follow all required “BMPs” articulated
in the Fugitive Dust Manual and a least one additional BMP included during each of the identified
activities in accordance with City Ordinance No. 044 2016. Also a copy of the Dust Control Manual will be
kept in the trailer during construction for reference. Such activities will include but not limited to
watering the site, covering trucks, slower site speeds and vehicle tracking mentioned above.
5.9 ROUTING MAINTENANCE ACTIVITIES INVOLVING FERTILIZER, PESTICIDES, DETERGENTS,
FUELS, SOLVENTS, OILS
Fertilizers and pesticides will be used during the later phases of the project when trying to establish a
healthy vegetation. These chemicals are highly water soluble and are easily and unnoticeably carried in
the stormwater. Proper application rates and recommended timing of application will be strictly
followed and not on days, or the next day, where the weather is calling for precipitation (materials
management control). As most of these types of chemicals will be brought on by the landscaper, they
will be required to keep these products in their vehicles until time of application and not be allowed to
leave these materials on the site (site management control). If these materials are stored on site, they
shall be kept inside or outside covered and above the ground to prevent the materials from mixing with
water and runoff (materials management control). Detergents, paints, acids, cement, grout, and solvents
will be prevalent in the interior work of the building (materials management). These materials also are
typically easily mixed with water yet are typically noticeable by discolored, cloudy, or sudsy water. As
such, the contractor will always keep an eye out for these types of differences in water around the site
(site management control). However, these materials are to be handled, operated, and cleaned up all
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within the inside of the structure, where external use is concerned these materials will be stored in the
construction CONEX box, trailers, vehicles, or the like out of contact with precipitation (materials
management). If not stored in a location as described secondary containment will be required (materials
management). Fuels and oils might be associated with the smaller equipment used on site, chainsaws,
pumps, generators, etc. As petroleum products are easily suspended in water and are spread across the
top of the water surface. These products when located in water have rainbow sheen on them. They are
also monitored during construction (site management controls). These products will be stored in the
construction CONEX box, trailers, vehicles, or similar structure that will minimize contact with
precipitation (materials maintenance controls). If not stored in a location as described secondary
containment will be required (materials maintenance). Any untreated runoff from these activities can be
detrimental to wildlife if not cleaned up.
5.10 ON-SITE WASTE MANAGEMENT PRACTICES
All large and heavy weighted waste piles (concrete chunks, excavated pipes, etc.) will be kept in a neatly
grouped pile until the material is to be disposed of properly. These piles will only be stored the shortest
duration possible and will be kept 50 feet from any drainage course or inlet (Administrative Control). All
dry wastes will be maintained through dumpsters and monthly hauler removal (hauler will be notified if
dumpster becomes full and hauled off as needed). Where available by the hauling company the
dumpster will be covered. If not practical or available by the haul company, an increased removal
schedule will be followed and the “Max fill line” on the dumpster will be strictly followed. Corners of the
dumpsters will be monitored for “Dumpster Juice” leaking into the soil in dry conditions and rain/melt
off conditions looking for it mixing with the runoff. Dumpsters, like the waste piles, will be located at
least 50 feet from any drainage course or inlet. Workers will be sent around at the end of the day to
collect trash to prevent trash being left out overnight. No construction debris (including broken
concrete) will be buried on site.
5.11 CONCRETE TRUCK/EQUIPMENT WASHING
Concrete will be a portion of this project. It is anticipated that it will be used with the joints around the
manholes, pour in place inlets, curb and gutter installation, sidewalks and culvert construction. Pre
mixed concrete trucks will be used in this process and will be delivered to the site and when pouring the
culvert components. Washing of the concrete equipment will be required to maintain the concrete
equipment. This concrete wash water has a high alkaline content which is hazardous material to
terrestrial and aquatic wildlife. A section of dirt near the entrance will be excavated and compacted
around the sides formed to retain the concrete wash water on site (as an acceptable practice by the
State) so long as the wash water is kept in the washout (concrete washout). There will be a rock pad for
the truck to park on while washing as to prevent tracking from this washout (VTC). The placement of this
washout will be located at least 50 feet from any drainage course or inlet. Later in the project after the
parking lots curb and gutter has been poured the use of a mobile washout facility will be used on site in a
similar location and after the ground has been leveled (concrete washout – mobile). The contractor
(including all masonry and concrete tradesme n) shall clean out equipment within the washout area so
that the runoff is not allowed to leave the washout. The only exception would be for them to wash in the
next day’s pour location. All concrete workers will be made aware of the where they are to wash (site
management controls & education). If there is a significant amount of spillage when the transfer from
concrete truck to pump truck occurs, a tarp or other ground cloth should be used to collect spillage
(ground cover control).
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5.12 DEDICATED ASPHALT AND CONCRETE BATCH PLANTS
There will be no dedicated asphalt or concrete batch plants erected onsite for this project. Premixed
concrete and paving materials will be delivered to the site and placed.
In the event that a plant is needed, the Contractor should be aware that additional permitting will be
required. In particular, an Air Pollutant Emission Notice (APEN) will need to be obtained from the
CDPHE.
5.13 NON-INDUSTRIAL WASTE SOURCES SUCH AS WORKER TRASH AND PORTABLE TOILETS
Since facilities are not located nearby for workers to use, trash and sanitary facilities will be required on
the site.
Worker trash will be comingled with the industrial trash and will follow the same controls with the caveat
that a trashcan will be located near the entrance of the site as the contractor will need to dump their
trash from lunch, etc. and this will be emptied weekly or more frequently, if needed. Designate trash and
bulk waste collection areas on-site. Dumpsters should be located near site entrances to minimize traffic
on disturbed soils, and they should be placed on a level soil surface. When possible, m aterials should be
recycled. Hazardous material waste should be segregated from other solid waste.
If tipped over and when being cleaned, portable toilet facilities become a potential discharge if not
cleaned up. If human waste is spilled, it will need to be treated as a biological hazard of untreated
sewage and will need to be cleaned up in accordance with Larimer County Health Department Guidance.
The toilets will be staked in a way to prevent tipping on a dirt surface and located at least 50 feet from a
drainage course or inlet. If the site cannot accommodate a portable toilet on dirt, a containment p an or
other secondary containment will be provided. They will also be anchored prevent from tipping. All
materials shall be properly disposed of in accordance with the law.
5.14 SAW CUTTING AND GRINDING
The concrete work and street connections will require cutting into the City street. This project will need
the use of hardened saws. These saws generate a significant amount of dust. Watering the cutting
surface to prevent airborne particulates (BMP in the City’s Fugitive Dust Manual) is required. The cutting
slurry has a high content of fine particulates (Silica Dust, Metals, etc.) that is not allowed to discharge as
runoff from the site. To prevent slurry from discharging offsite, contractors will use the minimum
amount of water needed to prevent dust and blades from overheating (site management control).
Cutting slurry will be collected via vacuum or allowed to dry out and be scraped and swept up after the
cutting has finished (saw cutting).
The following protocol is recommended to prevent 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 surfacing operations
• Slurry and cuttings shall not remain on permanent concrete or asphalt pavement overnight
• Slurry and cuttings shall not drain to any natural or constructed drainage conveyance
• Collected slurry and cuttings shall be disposed of in a manner that does not violate groundwater or
surface water standards
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5.15 MATERIAL HANDLING AND SPILL PREVENTION
Potential pollution sources, as discussed in earlier sections, are to be identified by the contractor. Spill
prevention procedures are to be determined and put in place before construction by the contractor. A
spill and flooding response procedure must also be determined and put in place before construction by
the contractor. Additionally, steps should be taken to reduce the potential for leaks and spills to come in
contact with stormwater run-off, such as storing and handling toxic materials in covered areas or storing
chemicals within berms or other secondary containment devices.
A notification procedure must be put in place by the contractor, by which workers would first notify the
site construction superintendent, who would then notify the SWMP Administrator. Depending on the
severity of the spill, the site construction superintendent and SWMP Administrator would possibly notify
the Colorado Department of Public Health and Environment - Water Quality Control Division,
downstream water users, or other appropriate agencies. The release of any chemical, oil, petroleum
product, sewage, etc., which enter waters of the State of Colorado (which include surface water,
groundwater, and dry gullies or storm sewers leading to surface water) must be reported
immediately to the Division’s emergency spill reporting line at (877) 518-5608. All spills requiring
cleanup, even if the spill is minor and does not need to be reported to the State, should still be reported
to the City of Fort Collins Utilities office at 970-221-6700.
It will be the responsibility of the Contractor to designate a fueling area and take the necessary
precautions to ensure that no stormwater pollution occurs in the event that a fueling area is needed.
Fueling areas shall be located a minimum 100 feet from all drainage courses. A 12-inch high compacted
earthen ridge capable of retaining potential spills shall enclose fueling areas. Other secondary
containment devices can be used instead of the earthen ridge. The area shall be covered with a non -
porous lining to prevent soil contamination. Printed instructions for cleanup procedures shall be posted
in the fueling area and appropriate fuel absorbents shall be available along with containers for used
absorbents within the fueling area.
5.16 NON-STORMWATER DISCHARGES, INCLUDING CONSTRUCTION DEWATERING NOT
COVERED UNDER THE CONSTRUCTION DEWATERING DISCHARGES GENERAL PERMIT AND
WASH WATER THAT MAY CONTRIBUTE TO POLLUTANTS TO THE MS4
The Stormwater Construction Permit only covers discharges composed entirely of stormwater. The
discharge of pumped stormwater, ONLY, from excavations, ponds, depressions, etc. to surface waters, or
to a municipal storm sewer system is allowed by the Stormwater Construction Permit, as long as the
dewatering activity and associated BMPs are identified in the Stormwater Management Plan (SWMP) and
are implemented in accordance with the SWMP.
Aside from the exceptions noted above, non-stormwater discharges must be addressed in a separate
permit issued for that discharge. If groundwater is encountered, and dewatering is required, a
Construction Dewatering Permit must be acquired from the Colorado Department of Public Health and
Environment.
Based upon a subsurface exploration report done in 2022 by Earth Engineering Consultants LLC, ground
water levels indicate that it may be present during construction of underground utilities. If encountered,
dewatering activities may be required. Groundwater has in most excavations mixed with the dirt and as
they are pumped, they will add an increased velocity coming out of the out-flow end contributing to
erosion and speeding the transport of the suspended sediment particles. Also, construction dewatering
activities must be identified in the Erosion Control Report if they are to be infiltrated on site. If the
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material is anticipated to be pumped to a stormwater conveyance the proper Construction Dewatering
Permit must be pulled from the State of Colorado. If pumping activities are to occur on the site, the use
of rock packs on the intake end of the pump will be used and a silt bag will be used on the outflow end of
the pump to reduce the silt and sediment from leaving the activity (dewatering Control Measure). If this
will be under a Dewatering Permit water samples will be collected in accordance with that permit.
6.0 STORMWATER MANAGEMENT CONTROLS
6.1 SWMP ADMINISTRATOR
A SWMP Administrator must be designated in conjunction with the Stormwater Permit. This person shall
be responsible for developing, implementing, maintaining, and revising the SWMP. The SWMP
Administrator will also be the contact for all SWMP-related issues and will be the person responsible for
the accuracy, completeness, and implementation of the SWMP. The Administrator should be a person
with the authority to adequately manage and direct day-to-day stormwater quality management
activities at the site.
The SWMP Administrator for this site is:
Name: (to be filled in by permittee)
Company: (to be filled in by permittee)
Phone: (to be filled in by permittee)
E-mail: (to be filled in by permittee)
6.2 OWNER INFORMATION
Name: Alan Engel
Company: Crowne Partners, Inc.
Phone:
E-mail:
6.3 BEST MANAGEMENT PRACTICES (BMPS) FOR STORMWATER POLLUTION PREVENTION
Beginning from mobilization, and throughout the entire construction of the project, erosion control
devices shall be installed to ensure minimal pollutant migration. These erosion control devices may be
installed in phases, or not at all, depending on act ual conditions encountered at the site. It is the
responsibility of the Contractor to make the determination as to what practices should be employed and
when. In the event that a review agency deems BMPs to be insufficient, it shall be the responsibility of
the contractor to implement modifications as directed.
Best Management Practices (BMPs) are loosely defined as a method, activity, maintenance procedure, or
other management practice for reducing the amount of pollution entering a water body. The term
originated from rules and regulations in Section 208 of the Clean Water Act.
Details for Structural and Non-Structural BMPs have been included in Appendix B. These details should
be used for additional information on installation and maintenance of BMPs specified in this report. It is
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also intended to serve as a resource for additional BMPs that may be appropriate for the site that have
not specifically been mentioned in the report.
6.4 STRUCTURAL PRACTICES FOR EROSION AND SEDIMENT CONTROL
Structural BMPs are physical devices that are implemented to prevent erosion from happening or to limit
erosion once it occurs. These devices can be temporary or permanent, and installation of individual
components will vary depending on the stage of construction.
A table depicting construction sequence and BMP application/removal has been placed on the “Dynamic
Site Plan” to help document the implementation of these BMPs. Refer to the Stormwater Management
Plan Static Site Plan in the Appendix for the assumed location of all BMPs. Construction Details for
Temporary BMPs are located in the Appendix for reference.
Again, the final determination for which BMP’s will be installed, where they will be located, and when
they will be installed shall be made by the Contractor, along with all documentation throughout the
construction process.
Silt Fencing (Phase I)
Silt fencing shall be provided to prevent migration of sediment off-site or into adjacent properties. All
silt fencing shall be installed prior to any land disturbing activity (demolition, stockpiling, stripping,
grading, etc.). Silt fencing is to be installed prior to site excavation or earthwork activities.
Inspections of the silt fence should identify tears or holes in the material and should check for slumping
fence or undercut areas that allow flows to bypass the fencing. Damaged sections of the silt fence
should be removed to maintain BMP effectiveness, typically before it reaches a depth of 6 inches.
It is suggested that silt fencing be located along the perimeter of the site. Refer to the Erosion Control
Plan (Sheets EC1-EC2) for additional clarification.
Sediment Control Log – aka “Straw Wattles” (Phase I)
A Sediment Control Log is a linear roll made of natural materials, such as straw, coconut fiber, or other
fibrous material trenched into the ground and held with a wooden stake. Sediment Control Logs can be
used in many instances. Examples include perimeter control for stockpiles, as part of inlet protection
designs, as check dams in small drainage ways, on disturbed slopes to shorten flow lengths, or in lieu of
silt fencing (where appropriate).
Sediment Control Logs should be inspected for excess sediment accumulation. Sediment should be
removed prior to reaching half the height of the log.
At a minimum, Sediment Control Logs should be used around soil stockpiles (including landscape
material) and at all stormwater discharge locations other than inlets. All proposed landscape swales,
including ones discharging into detention ponds shall have a straw wattle installed perpendicular to flow
every 4” of elevation difference. Refer to the Erosion Control Plan (Sheet EC1) for additional clarification.
Vehicle Tracking Control Pads (Phase I)
Vehicle tracking control pads shall be provided to minimize tracking of mud and sediment onto paved
surfaces and neighboring roadways. All vehicle tracking control pads shall be installed prior to any land
disturbing activity (demolition – as necessary, stockpiling, stripping, grading, etc.). Location of vehicle
tracking control pads will be located at any and all existing and future vehicle accesses being used
during any of the construction phases. These locations will primarily be dictated by gates or o penings in
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the temporary construction fencing that is expected to be installed. Vehicle tracking control pads are to
be installed prior to demolition (as appropriate), site excavation or earthwork activities.
Vehicle tracking pads should be inspected for degradation and aggregate material should be replaced as
needed. If the area becomes clogged with water, excess sediment should be removed. Aggregate
material should remain rough, and at no point should aggregate be allowed to compact in a manner that
causes the tracking pad to stop working as intended.
Suggested locations for vehicle tracking pads are at the proposed access northwest side of the site at the
Lindenmeier Road entrance, and on the northeast side of the site at the Lemay Avenue entrance . During
initial and interim phases of Erosion Control the suggested locations of vehicle tracking pads are at the
west and east entrances to the project site. Refer to the Erosion Control Plan (Sheets EC1 – EC2) for
additional clarification.
Inlet Protection (Phase I & II)
Inlet protection shall be provided for existing inlets to prevent sediment transport from adjacent
earthwork disturbance. Installation of these filters shall occur before adjacent earth disturbing activities
(Phase I implementation). Wattle type filters are to be implemented for new and existing inlets where
asphalt does not exist. For these inlets, if pavement is constructed adjacent to the structure or if the area
adjacent to the inlet is changed such that the wattle type filter is no longer effective, it shall be the
responsibility of the Contractor to ensure that an appropriate method is used instead. For example, the
wattle filter could be reused, or a gravel-block inlet filter may be installed. It will be left to the discretion
of the Contractor as to whether replacement of any inlet filter is necessary.
Inlet protection should be inspected regularly for tears that can result in sediment entering an inlet.
Inlet protection should also be inspected for sediment accumulation upstream of the inlet, and sediment
should be removed when the less than half of the capacity is available, or per manufacturer
specifications.
All proposed curb inlets along proposed roadways and upstream flared end sections shall have inlet
protection. In addition, any inlets or openings discharging into the Stormtech chambers shall have inlet
protection or appropriate BMP’s to prevent sediments from accumulating within the Stormtech
chambers. Refer to the Erosion Control Plan (Sheets EC1 – EC2) for additional clarification.
Concrete Washout Area (Phase II)
A concrete washout should be provided on the site. The washout can be lined or unlined excavated pits
in the ground, commercially manufactured prefabricated containers, or aboveground holding areas.
The concrete washout must be located a minimum of 400 feet from any natural drainage way or body of
water, and at least 1000 feet from any wells or drinking water sources. Washout areas should not be
located in an area where shallow groundwater may be present. Contractor shall clearly show the desired
location and access to the Concrete Washout Area on the Stormwater Management Plan - Dynamic Site
Plan. Contractor shall place a Vehicle Tracking Pad if the selected location for the Concrete Washout
Area is detached from pavement. Clear signage identifying the concrete washout should also be
provided.
The Concrete Washout Area should be inspected regularly. Particular attention should be paid to
signage to ensure that the area is clearly marked. Confirmation that the washout is being used should
also be noted to ensure that other undesignated areas of the site are not being used incorrectly as a
concrete washout.
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It is suggested the Contractor build a concrete wash out pit for this project. It is recommended that the
concrete wash out pit be placed adjacent to either entrance of the site. This location is to ensure
minimum distance from wash out to exiting the site. This location is only a suggestion and can be
relocated at the discretion of the Contractor.
Permanent/Established Vegetation (Phase IV)
Permanent or established vegetation and landscaping is considered a permanent form of sediment and
erosion control for common open spaces, steep slopes and areas not exposed to prolonged scour
velocities, or acute incipient motion bed shear stresses that w ill create soil erosion, rill formation and
subsequent sediment transport. Areas where the previous conditions apply will contain sufficient
permanent BMPs, such as riprap or cobble mulch. Permanent vegetation shall conform to the approved
Landscape Plan prepared by Vignette Studios LLC. Permanent/Established vegetation and hardscape
defines Phase IV of development.
6.5 NON-STRUCTURAL PRACTICES FOR EROSION AND SEDIMENT CONTROL
Non-Structural BMPs are practices or activities that are implemented to prevent erosion from happening
or to limit erosion once it occurs. These BMPs can be a practice resulting in physical change to the site,
such as mulching or slope stabilization. They can also result in behavioral changes on the site, such as
changes to construction phasing to minimize exposure to weather elements, or increased employee
awareness gained through training.
Protection of Existing Vegetation (Phases I-IV)
Protection of existing vegetation on a construction site can be accomplished through installation of a
construction fence around the area requiring protection. In cases where up-gradient areas are
disturbed, it may also be necessary to install perimeter controls to minimize sediment loading to
sensitive areas such as wetlands.
Stockpile Management (Phases I-III)
Stockpile management should be utilized to minimize erosion and sediment transport from soil
stockpiles. In general, soil stockpiles should be located a minimum of 100 feet from any drainage way
and 50 feet from any storm sewer inlets. Where practical, choose a stockpile location that will remain
undisturbed for the longest period of time as the phases of construction progress. Sediment control
BMPs should be placed around the perimeter of the stockpile, and a designated access point on the
upstream side of the stockpile should be identified. BMPs such as surface roughening, temporary
seeding, mulching, erosion control blankets, or soil binders should be used to stabilize the stockpile
surface.
As a part of stockpile management, regular inspections of the perimeter controls should be completed.
If BMPs have been utilized to stabilize the surface of the stockpile, they should be inspected and repaired
as needed.
While soil stockpiles are not expected with this project, it is possible that foundation excavation or the
delivery landscaping material may generate temporary stockpiles. The location of any such stockpiles
shall be the responsibility of the SWMP Administrator.
Mulching (Phase I-III)
Mulching helps reduce erosion by protecting bare soil from rainfall impact, increasing infiltration, and
reducing runoff. Although often applied in conjunction with temporary or permanent seeding, it can
also be used for temporary stabilization of areas that cannot be reseeded due to seasonal constraints.
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The most common type of mulch used is hay or grass that is crimped into the soil to keep it secure.
However, crimping may not be practical on slopes steeper than three to one (3H:1V).
The Contractor shall mulch all planted areas within twenty -four (24) hours after planting. Only weed-
free and seed-free straw mulch may be used. Straw mulch should be applied at two (2) tons per acre,
and shall be adequately secured by crimping, tackifier, netting or blankets. Hydraulic mulching may also
be used on steep slopes or where access is limited. In the case that hydraulic mulching is utilized, the
Contractor shall use wood cellulose fibers mixed with water at two thousands to two thousand five
hundred (2,000-2,500) pounds per acre and organic tackifier at one hundred to four hundred (100 -400)
pounds per acre.
The Contractor is responsible in applying wood chip mulch to all planted trees and shrubs as shown on
the Landscape Plan prepared by Vignette Studios LLC.
Wind Erosion/Dust Control (Phase I-IV)
Wind Erosion and Dust Control BMP’s help to keep soil particles from entering the air as a result of land
disturbing construction activities. Attached at the end of the Appendix B is the Fort Collins Dust
Prevention and Control Manual. The purpose of this manual is to establish minimum requirements
consistent with nationally recognize BMP’s for controlling fugitive dust emissions and to describe
applicable best management practices to prevent, minimize, and mitigate off-property transport or off-
vehicle transport of fugitive dust emissions pursuant to Chapter 12, Article X of the Fort Collins City Code
(§12-150 et. seq) for specific dust generating activities and sources. Examples include use of a water
truck or irrigation/sprinkler system to wet the top layer of disturbed soil, seeding and mulching, soil
binders, or wind fences.
Please refer to the last three pages of Appendix B for the Dust Control Plan. A Dust Control Plan is
required for all development projects or construction sites with greater than five (5) acres in size.
Street Sweeping (Phases I -IV)
Street sweeping should be used to remove sediment that has been tracked onto adjacent roadways.
Roadways should be inspected at least once a day, and sediment should be removed as needed. A check
of the area inlet protection should be completed after sweeping to ensure nothing was displaced during
sweeping operations. Street sweeping can reduce the sediment washed into the existing storm drain
system. Street sweeping may be necessary on the existing hardscape areas which receive runoff from the
disturbed areas.
Good Housekeeping Practices (All phases)
Good housekeeping practices that will prevent pollution associated with solid, liquid, and hazardous
construction-related materials and wastes should be implemented throughout the project. Examples of
good housekeeping include providing an appropriate location for waste management containers,
establishing proper building material staging areas, designating paint and concrete washout areas,
establishing proper equipment/vehicle fueling and maintenance practices. Development of a spill
prevention and response plan is another example of Good Housekeeping practices that should be used
on the project. The following items are detailed examples of some of the good housekeeping practices
that should be utilized throughout the project. It should be noted that a complete list of practices and
detailed discussion regarding good housekeeping has been included within the Potential Pollution
Sources section of this report.
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Street Sweeping and Vacuuming – Street sweeping and vacuuming should be used to remove sediment
that has been tracked onto adjacent roadways. Roadways should be inspected at least once a day, and
sediment should be removed as needed. A check of inlet protection should be completed a fter sweeping
to ensure nothing was displaced during sweeping operations.
Waste Management – Designate trash and bulk waste collection areas on-site. When possible, materials
should be recycled. Hazardous material waste should be segregated from other solid waste. Waste
collection areas should be located away from streets, gutters, watercourses, and storm drains.
Dumpsters should be located near site entrances to minimize traffic on disturbed soils, and they should
be placed on a level soil surface.
Establish Proper Building Material Handling and Staging areas – Clearly designate site areas for staging
and storage of building materials. Provide appropriate BMPs to ensure that spills or leaks are contained.
Establish Proper Equipment/Vehicle Fueling and Maintenance Practices – If needed, create a clearly
designated on-site fueling and maintenance area that is clean and dry. Provide appropriate BMPs to
ensure that spills or leaks are contained.
6.6 PHASED BMP INSTALLATION
It is important to recognize the four (4) major Development Phases as defined by the State of Colorado’s
Stormwater Discharge Permit (SDP). These four development phases (referred to as Sequencing by the
City of Fort Collins) have been distinguished to aid in the appropriate timing of installation/
implementation of BMPs at different stages of the construction process. These phases are described as
follows:
Phase I – Demolition Stage; BMPs for initial installation of perimeter controls
Phase II – Infrastructure Stage; BMPs for utility, paving, and curb installation
Phase III – Vertical Construction Stage; BMPs for individual building construction.
Phase IV – Permanent BMPs and final site stabilization.
The following is a rough estimate of the anticipated construction sequence for site improvements. The
schedule outlined below is subject to change as the project progresses and as determined by the General
Contractor.
Table 2 – Preliminary Permit and Construction Schedule
Included in the back map pockets are two Site Plans: a “Static” Site Plan and a “Dynamic” Site Plan. The
“Static” plan serves to display the overall management plan all at once. However, proper
implementation of BMPs does not occur at once, and certain BMPs may move location in the
TASK BEGINNING
DATE ENDING DATE "BMP-PHASE OF
DEVELOPMENT"
Development Construction Permit
Issued by City of Fort Collins March 2024 April 2024 I
Overlot Grading (Demolition) March 2024
April 2024
I
Utility Installation April 2024
June 2024 II
Road Construction April 2024 August 2024 III
Final Stabilization August 2024 October 2024 IV
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construction process; therefore, the “Dynamic” Site Plan is intended for the contractor to write in the
BMP symbols to document the location and time the BMPs are installed and maintained throughout the
entire construction process.
6.7 BMP INSPECTION
All temporary erosion control facilities shall be inspected at a minimum of once every two (2) weeks and
after each significant storm event or snowmelt. Repairs or reconstruction of BMPs, as necessary, shall
occur as soon as possible to ensure the continued performance of their intended function. It is the
responsibility of the SWMP Administrator to conduct bi-weekly inspections, maintain BMPs if needed,
keep records of site conditions and inspections, and update the SWMP as necessary.
The construction site perimeter, disturbed areas, all applicable/installed erosion and sediment control
measures, and areas used for material storage exposed to precipitation shall be inspected for evidence
of, or the potential for, pollutants entering the drainage system. Erosion and sediment control measures
identified in the SWMP shall be observed to ensure they are operating correctly. Attention should be paid
to areas with a significant potential for stormwater pollution, such as demolition areas, concrete
washout locations, and vehicle entries to the site. The inspection must be documented to ensure
compliance with the permit requirements.
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6.8 BMP MAINTENANCE
Any BMPs not operating in accordance with the SWMP must be addressed as soon as possible,
immediately in most cases, to prevent the discharge of pollutants. If modifications are necessary, such
modifications shall be documented so that the SWMP accurately reflects on-site conditions. The SWMP
needs to accurately represent field conditions at all times.
Uncontrolled releases of mud, muddy water, or measurable amounts of sediment found offsite will be
recorded with a brief explanation of the measures taken to clean up the sediment that has left the site,
as well as the measures are taken to prevent future releases. This record shall be made available to the
appropriate public agencies (Colorado Department of Public Health and Environment, Water Quality
Control Division; Environmental Protection Agency; City of Fort Collins; etc.) upon request.
Preventative maintenance of all temporary and permanent erosion control BMPs shall be provided to
ensure the continued performance of their intended function. Temporary erosion control measures are
to be removed after the site has been sufficiently stabilized, as determined by the City of Fort Collins.
Maintenance activities and actions to correct problems shall be noted and recorded during inspections.
Inspection and maintenance procedures specific to each BMP identified with this SWMP are discussed in
Section 3. Details have also been included in Appendix B.
6.9 RECORD KEEPING
Documentation of site inspections must be maintained. The following items are to be recorded and kept
with the SWMP:
• Date of Inspection
• Name(s) and title(s) of personnel making the inspection
• Location(s) of sediment discharges or other pollutants from the site
• Location(s) of BMPs that need to be maintained
• Location(s) of BMPs that failed to operate as designed or proved inadequate
• Locations(s) where additional BMPs are needed that were not in place at the time of inspection
• Deviations from the minimum inspection schedule
• Descriptions of corrective action taken to remedy deficiencies that have been identified
• 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 after corrective actions have been taken.
Provided within Appendix E of this SWMP is an Example Inspection Log to aid in the record keeping of
BMP inspections and maintenance. Photographs, field notebooks, drawings, and maps should be
included by the SWMP Administrator when appropriate.
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In addition to the Inspection Log, records should be kept documenting:
• BMP maintenance and operation
• Stormwater contamination
• Contacts with suppliers
• Notes on the need for and performance of preventive maintenance and other repairs
• Implementation of specific items in the SWMP
• Training events (given or attended)
• Events involving materials handling and storage
• Contacts with regulatory agencies and personnel
• Notes of employee activities, contact, notifications, etc.
Records of spills, leaks, or overflows that result in the discharge of pollutants must be documented and
maintained. A record of other spills responded to, even if they do not result in a discharge of pollutants,
should be made. Information that should be recorded for all occurrences includes the time and date,
weather conditions, reasons for the spill, etc. Some spills may need to be reported to authorities
immediately. Specifically, a release of any chemical, oil, petroleum product, sewage, etc., which may
enter waters of the State of Colorado (which include surface water, groundwater, and dry gullies or
storm sewers leading to surface water) must be reported to the CDPHE.
Additionally, the “Dynamic Site Plan” is intended to be a “living” document where the SWMP
Administrator can handwrite the location of BMPs as they are installed to appropriately reflect the
current site conditions. Also, on the “Dynamic Site Plan” is a “Table of Construction Sequence and BMP
Application/Removal” the SWMP Administrator can use to document when BMPs were installed or
removed in conjunction with construction activities. These items have been included as an aid to the
SWMP Administrator, and other methods of record keeping are at his or her discretion.
This Stormwater Management Plan (both the text and map) is not a static document. It is a
dynamic device intended to be kept current and logged as construction occurs. It shall be the
responsibility of the SWMP Administrator and/or the permit holder (or applicant thereof) to ensure
the plan is properly maintained and followed. Diligent administration is critical, including
processing the Notice to Proceed and noting on the Stormwater Management Plan the dates that
various construction activities occur and respective BMPs are installed and/or removed.
7.0 FINAL STABILIZATION AND LONG-TERM STORMWATER MANAGEMENT
7.1 FINAL STABILIZATION
Final stabilization of the site will be achieved by either leaving a gravel surface in place of the existing
asphalt roadway or by reseeding. If reseeding is to be used, all disturbed areas will be seeded, crimped ,
and mulched within 24 hours of seeding per the FCDCM Chapter 2 Section 6.1.4.9.
Soil amendments such as compost, peat, aged manure, or other similar materials shall also be utilized.
Soil amendments shall be tilled into the soil to a minimum depth of 6” and should comply with the
requirements found in City Code Section 12-132 (also refer to Land Use Code 3.8.21).
Per the Landscaping Plans, the City of Fort Collins Upland Mix is specified everywhere other than around
the detention ponds. Per the Landscaping Plans, the City of Fort Collins Detention Basin Mix is specified.
Please refer to the landscaping plans for a more information.
`
NORTHERNENGINEERING.COM | 970.221.4158 SWMP: THE CROWNE AT SUNIGA
FORT COLLINS | GREELEY 20 | 19
Table 3 – City Of Fort Collins Upland Mix
*If broadcast method is used, rates shall be doubled
Non-seed stabilization is expected to be completed soon after hardscape construction is complete.
Seeded areas will require more time to establish and may need to be irrigated to establish growth.
As defined by the Colorado Department of Public Health and Environment (CDPHE) in the General Permit
Application for Stormwater Discharges, “Final stabilization is reached when all soil disturbing activities
at the site have been completed, and uniform vegetative cover has been established with a density of at
least 70 percent of pre-disturbance levels or equivalent permanent, physical erosion reduction methods
have been employed.” Establishment of 70 percent is required for a determination for project closure by
the City of Fort Collins.
7.2 LONG-TERM STORMWATER MANAGEMENT
The primary method of long-term stormwater management will be the Stormtech chamber isolator
rows. The isolator rows will remove suspended sediment and pollutants from developed run-off before
entering drainage facilities downstream of the site. The isolator rows will require annual inspections
and periodic maintenance by the owner per the Stormtech manufacturer’s recommendations.
After stabilization, before project closure, all sediment shall be removed from storm piping per FCDCM
Chapter 2 Section 6.1.4.9. City of Fort Collins may require removal of sediment from Stormtech
chambers prior to final approval.
All disturbed areas will receive permanent paving or be vegetated per the Landscape Plan. Low Impact
Development (LID) treatment will provide significant water quality enhancement and will serve the long-
term stormwater management goals for this project.
COMMON NAME PLS/ACRE
PLAINS COREOPSIS 0.17
ROCKY MTN PENSTEMON 0.35
PURPLE PRAIRIE CLOVER 0.81
INDIAIN BLANKETFLOWER 1.85
MEXICAN HAT 0.2
INDIAN RICEGRASS 1.13
SIDEOATS GRAMA 1.15
BUFFALOGRASS 3.27
BLUE GRAMA 0.25
BOTTLEBRUSH SQUIRRELTAIL 0.95
PRAIRIE JUNEGRASS 0.08
GREEN NEDDLEGRASS 1.01
SWITCHGRASS 0.71
WESTERN WHEAT 1.61
SAND DROPSEED 0.04
TOTAL 13.58
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NORTHERNENGINEERING.COM | 970.221.4158 SWMP: THE CROWNE AT SUNIGA
FORT COLLINS | GREELEY 21 | 19
8.0 ADDITIONAL SWMP AND BMP RESOURCES
Mile High Flood District
Urban Storm Drainage Criteria Manual - Volume 3 “Best Management Practices”
Colorado Department of Transportation
Erosion Control and Stormwater Quality Guide
BMP Field Academy
EPA Menu of BMPs
Construction Site Storm Water Runoff Control
International Stormwater Best Management (BMP) Database
Rocky Mountain Education Center
Rocky Mountain Education Center
Red Rocks Community College, Lakewood
Keep It Clean Partnership
Boulder
9.0 REFERENCES
1. Drainage Report for The Crowne at Suniga, Northern Engineering, November 16, 2023 (NE Project No.
1893-001).
2. Geotechnical Subsurface Exploration Report Proposed Apartment Complex Development – Graham
Property Northeast Corner of 9th Street and Suniga Road, Earth Engineering Consultants, Windsor,
Colorado, June 2022.
3. North East College Corridor Outfall (NECCO) Design Report, Ayres Associates, Fort Collins, Colorado,
August 2009.
4. City of Fort Collins Landscape Design Guidelines for Stormwater and Detention Facilities , November 5,
2009, BHA Design, Inc. with City of Fort Collins Utility Services.
5. Fort Collins Stormwater Criteria Manual, City of Fort Collins, Colorado, adopted by Ordinance No. 174,
2011, and referenced in Section 26-500 (c) of the City of Fort Collins Municipal Code
6. Larimer County Urban Area Street Standards, Adopted January 2, 2001, Repealed and Reenacted,
Effective October 1, 2002, Repealed and Reenacted, Effective April 1, 2007
7. Soil Resource Report for Larimer County Area, Colorado, Natural Resources Conservation Service,
United States Department of Agriculture.
8. Urban Storm Drainage Criteria Manual, Volumes 1-3, Mile High Flood Control District, Wright-
McLaughlin Engineers, Denver, Colorado, Revised April 2008.
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NORTHERNENGINEERING.COM | 970.221.4158 SWMP: THE CROWNE AT SUNIGA
FORT COLLINS | GREELEY APPENDIX
APPENDIX A
SITE MAPS
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DFC NORTH FIELD LLC
981 LINDENMEIER ROAD
SUNIGA ROAD
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GRAHAM JOHN C / GINGER L
1100 E VINE DRIVE
EXISTING NECCO
STORM LINE A4
EXISTING
STORM INLET
EXISTING STORM
MANHOLE
EXISTING MANHOLE RISER A3
EXISTING
STORM INLET
EXISTING
STORM INLET
EXISTING
STORM INLET
EXISTING NECCO
BACKBONE STORM LINE A1
500-YEAR
FLOODPLAIN
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125'
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±2854 LF SILT FENCE
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48
CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU
DIG, GRADE, OR EXCAVATE FOR THE MARKING OF
UNDERGROUND MEMBER UTILITIES.
CALL UTILITY NOTIFICATION CENTER OF
COLORADO
Know what'sbelow.
before you dig.Call
R
NORTH
( IN FEET )
0
1 INCH = 50 FEET
50 50 100 150
TABLE OF CONSTRUCTION SEQUENCE AND BMP APPLICATION
Project: THE SAVOY
CONSTRUCTION PHASE MOBILIZATION DEMOLITION GRADING
BEST MANAGEMENT PRACTICES (BMPS)
STRUCTURAL "INSTALLATION"
Silt Fence Barriers *
Flow Barriers (Wattles) *
Inlet Filter Bags *
Vegetative
Temporary Seeding Planting
Mulching / Sealant
Permanent Seeding Planting
Sod Installation
Rolled Products : Netting / Blankets / Mats
Contour Furrows (Ripping / Disking)
Rock Bags *
UTILITIES
INSTALLATION
FLAT WORK
INSTALLATION LANDSCAPE DEMOBILIZATION
Vehicle Tracking Pad *
* All Temporary BMPs to be Removed once Construction is Complete
Any prior inlets that could use protecting
Any prior inlets that could use protecting
Anytime the site will sit dormant longer than 30 Days
Anytime the site will sit dormant longer than 30 Days
Anytime the site will sit dormant longer than 30 Days
Riprap
1.IT SHOULD BE NOTED THAT ANY EROSION CONTROL PLAN SERVES ONLY AS A
GUIDELINE TO THE CONTRACTOR. STAGING AND/OR PHASING OF BEST
MANAGEMENT PRACTICES (BMPs) IS EXPECTED. ADDITIONAL AND/OR DIFFERENT
BMPs FROM THOSE ORIGINALLY DEPICTED MAY BE NECESSARY DURING
CONSTRUCTION DUE TO CHANGING SITE CONDITIONS OR AS REQUIRED BY LOCAL
AUTHORITIES.
2.THIS EROSION CONTROL PLAN IS SCHEMATIC IN NATURE. AS SUCH, GRAPHICAL
SYMBOLS MAY NOT BE TO SCALE, NOR ARE THEY NECESSARILY SHOWN IN THEIR
EXACT LOCATION.
3.THE CONTRACTOR SHALL BE RESPONSIBLE FOR ALL PERMITTING (CITY, STATE
DISCHARGE PERMIT, ETC.) AND COMPLIANCE WITH GOVERNING AUTHORITIES. IT
SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR (OR PERMIT HOLDER) TO
ENSURE EROSION CONTROL MEASURES ARE PROPERLY MAINTAINED AND
FOLLOWED.
4.CONTRACTOR SHALL IMPLEMENT THE APPROPRIATE EROSION CONTROL
MEASURES ACCORDING THE CONSTRUCTION SEQUENCING AND LEVEL OF SITE
STABILIZATION.
5.CONTRACTOR SHALL IMPLEMENT APPROPRIATE INLET PROTECTION FOR ALL
STORM DRAINS, SWALES, UNTIL SITE IS FULLY STABILIZED.
6.INLET PROTECTION SHALL BE ADAPTED, AS NECESSARY, TO THE SURROUNDING
SURFACE TYPE AND CONDITION (i.e., STAKE-DRIVEN WATTLES FOR BARE SOIL,
GRAVEL SOCKS FOR PAVEMENT, ETC.)
7.CONTRACTOR IS RESPONSIBLE FOR STABILIZING ALL SLOPES, PARTICULARLY
THOSE STEEPER THAN 6:1. CRIMP MULCHING, HYDRO MULCHING, EROSION MATS,
TEMPORARY IRRIGATION, AND ADDITIONAL WATTLES OR SILT FENCING MAY BE
NECESSARY TO ESTABLISH VEGETATIVE COVER AND STABILIZE THE SLOPE.
8.CONTRACTOR IS RESPONSIBLE FOR PREVENTING SEDIMENT FROM UNSTABILIZED
LANDSCAPE AREAS FROM MIGRATING ONTO AND ENTERING THE PERMEABLE
PAVER SYSTEMS UNTIL UPGRADIENT TRIBUTARY AREAS ARE FULLY STABILIZED.
9.CONTRACTOR SHALL IMPLEMENT APPROPRIATE PERIMETER PROTECTION FOR
AREAS DIRECTING DRAINAGE OFFSITE. PERIMETER PROTECTION SHALL BE
ADAPTED, AS NECESSARY, TO THE SURROUNDING SURFACE TYPE AND CONDITION
(i.e., STAKE-DRIVEN SEDIMENT CONTROL LOGS OR SILT FENCE FOR BARE SOIL,
GRAVEL SOCKS FOR PAVEMENT, ETC.)
10.FUELING FACILITIES SHALL BE LOCATED AT LEAST ONE HUNDRED (100) FEET FROM
NATURAL BODY OF WATER, WETLAND, NATURAL DRAINAGE WAY OR MANMADE
DRAINAGE WAY. THE FUEL TANKS AND FUELING AREA MUST BE SET IN A
CONTAINMENT AREA THAT WILL NOT ALLOW A FUEL SPILL TO DIRECTLY FLOW,
SEEP, RUN OFF, OR BE WASHED INTO A BODY OF WATER, WETLAND OR DRAINAGE
WAY.
11.CONSTRUCTION WASTE STORAGE (DUMPSTERS) AND PORTABLE SANITATION
UNITS (CONSTRUCTION TOILETS) SHALL BE LOCATED AT LEAST FIFTY (50) FEET
FROM ANY STORMWATER INLET, WETLAND, OR DRAINAGE WAY. SAID FACILITIES
MUST BE SET IN A CONTAINMENT AREA THAT WILL NOT ALLOW POLLUTANTS TO
DIRECTLY FLOW, SEEP, RUN OFF, OR BE WASHED INTO A BODY OF WATER,
WETLAND OR DRAINAGE WAY. DUMPSTERS SHALL BE LOCATED ON FLAT, STABLE
GROUND, AND CONSTRUCTION TOILETS SHALL BE STAKED DOWN.
12.THE CONTRACTOR AND ALL SUBCONTRACTORS WILL COOPERATE WITH THE CITY'S
CONSTRUCTION INSPECTORS BY CEASING OPERATIONS WHEN WINDS ARE OF
SUFFICIENT VELOCITY TO CREATE BLOWING DUST WHICH, IN THE INSPECTOR'S
OPINION, IS HAZARDOUS TO THE PUBLIC HEALTH AND WELFARE.
13.WHERE SEASONAL CONSTRAINTS (E.G., DURING SUMMER AND WINTER MONTHS)
INHIBIT PERMANENT SEEDING OPERATIONS, DISTURBED AREAS WILL BE TREATED
WITH MULCH AND MULCH TACKIFIER OR OTHER MATERIALS APPROVED BY
EROSION CONTROL STAFF TO PREVENT EROSION.
14.SEE LANDSCAPE PLANS FOR ADDITIONAL INFORMATION ON PLANTING,
REVEGETATION, HARDSCAPE AND OTHER PERMANENT SITE STABILIZATION
METHODS.
15.DIRT AND DEBRIS FROM CONSTRUCTION ACTIVITIES TRACKED ON CITY STREETS
SHALL BE KEPT TO A MINIMUM AND CLEANED IMMEDIATELY OR AT THE
SUGGESTION OF THE CITY'S EROSION CONTROL INSPECTOR.
16.CONTRACTOR SHALL KEEP CONSTRUCTION VEHICLES ENTERING AND EXITING SITE
TO A MINIMUM.
17.THE CONTRACTOR SHALL, AT ALL TIMES DURING AND AFTER SYSTEM
INSTALLATION, PREVENT SEDIMENT, DEBRIS, AND DIRT FROM ANY SOURCE FROM
ENTERING THE RAIN GARDEN SYSTEM OR THE SUBSURFACE TREATMENT SYSTEM.
LOOSE MATERIALS SHALL NOT BE STORED ON THE RAIN GARDEN AREA. MUD AND
SEDIMENT-LADEN RUNOFF SHOULD BE KEPT AWAY FROM THE RAIN GARDEN AREA.
TEMPORARILY DIVERT RUNOFF OR INSTALL SEDIMENT CONTROL MEASURES AS
NECESSARY TO REDUCE THE AMOUNT OF SEDIMENT RUN-ON TO THE RAIN
GARDEN SYSTEM.
PROPOSED CONTOUR
PROPOSED STORM SEWER
PROPOSED SWALE
EXISTING CONTOUR
PROPOSED CURB & GUTTER
PROPERTY BOUNDARY
SILT FENCE
ROCK SOCK
RIPRAP
1.CONTRACTOR SHALL IMMEDIATELY STABILIZE ALL DISTURBED SLOPES BY
CRIMP MULCHING OR SIMILAR METHODS.
2.SWMP ADMINISTRATOR:
Contact ________________________________
Company ________________________________
Address ________________________________
Phone________________________________
3.CONTRACTOR TO PROVIDE VEHICLE TRACKING CONTROL FOR CONCRETE
WASHOUT AREA IF ACCESS IS OFF PAVEMENT.
4.REFER TO THE PRELIMINARY DRAINAGE REPORT, DATED AUGUST 31, 2023 BY
NORTHERN ENGINEERING FOR ADDITIONAL INFORMATION.
5.REFER TO INLET SCHEDULE ON SHEET XX FOR CLARIFICATION FOR INLET AND
BASIN TYPES. SOME BASINS HAVE SOLID COVERS THEREFORE THEY DON'T
NEED INLET PROTECTION.
GENERAL NOTES:
WATTLE DIKE
CONCRETE WASH AREA
BALE INLET PROTECTION
SLOPE DRAIN
EROSION CONTROL FABRIC
LEGEND:
BALE OUTLET PROTECTION
INLET PROTECTION
VEHICLE TRACKING CONTROL PAD
SF
LIMIT OF DISTURBANCE LOD
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DFC NORTH FIELD LLC
981 LINDENMEIER ROAD
GRAHAM JOHN C / GINGER L
1100 E VINE DRIVE
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4' CONCRETE CULVERT
RUNDOWN
STORMTECH
MC-7200
SYSTEM
BUILDING 1000
BUILDING 2000
BUILDING 3000
BUILDING 4000
BUILDING 5000
BUILDING 6000
WATER QUALITY
BASIN w/ WEIR
WATER QUALITY
BASIN w/ WEIR
WATER QUALITY
BASIN w/ WEIR
TRACT A
D, U, EA
INLET TYPE R
(TYP.)
LANDSCAPE
DRAIN (TYP.)
AREA INLET (TYP.)
AREA INLET WITH
VEGETATED BUFFER
TREATMENT TRAIN
(BY OTHERS)
STORM DRAIN LINE A
SEE SHEET ST1
STORM DRAIN LINE C
SEE SHEET ST12
STORM MANHOLE
(TYP.)
NYOPLAST SOLID
GRATE COVER (TYP.)
±2854 LF SILT FENCE
Sheet
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49
CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU
DIG, GRADE, OR EXCAVATE FOR THE MARKING OF
UNDERGROUND MEMBER UTILITIES.
CALL UTILITY NOTIFICATION CENTER OF
COLORADO
Know what'sbelow.
before you dig.Call
R
NORTH
( IN FEET )
0
1 INCH = 50 FEET
50 50 100 150
TABLE OF CONSTRUCTION SEQUENCE AND BMP APPLICATION
Project: THE SAVOY
CONSTRUCTION PHASE MOBILIZATION DEMOLITION GRADING
BEST MANAGEMENT PRACTICES (BMPS)
STRUCTURAL "INSTALLATION"
Silt Fence Barriers *
Flow Barriers (Wattles) *
Inlet Filter Bags *
Vegetative
Temporary Seeding Planting
Mulching / Sealant
Permanent Seeding Planting
Sod Installation
Rolled Products : Netting / Blankets / Mats
Contour Furrows (Ripping / Disking)
Rock Bags *
UTILITIES
INSTALLATION
FLAT WORK
INSTALLATION LANDSCAPE DEMOBILIZATION
Vehicle Tracking Pad *
* All Temporary BMPs to be Removed once Construction is Complete
Any prior inlets that could use protecting
Any prior inlets that could use protecting
Anytime the site will sit dormant longer than 30 Days
Anytime the site will sit dormant longer than 30 Days
Anytime the site will sit dormant longer than 30 Days
Riprap
1.IT SHOULD BE NOTED THAT ANY EROSION CONTROL PLAN SERVES ONLY AS A
GUIDELINE TO THE CONTRACTOR. STAGING AND/OR PHASING OF BEST
MANAGEMENT PRACTICES (BMPs) IS EXPECTED. ADDITIONAL AND/OR DIFFERENT
BMPs FROM THOSE ORIGINALLY DEPICTED MAY BE NECESSARY DURING
CONSTRUCTION DUE TO CHANGING SITE CONDITIONS OR AS REQUIRED BY LOCAL
AUTHORITIES.
2.THIS EROSION CONTROL PLAN IS SCHEMATIC IN NATURE. AS SUCH, GRAPHICAL
SYMBOLS MAY NOT BE TO SCALE, NOR ARE THEY NECESSARILY SHOWN IN THEIR
EXACT LOCATION.
3.THE CONTRACTOR SHALL BE RESPONSIBLE FOR ALL PERMITTING (CITY, STATE
DISCHARGE PERMIT, ETC.) AND COMPLIANCE WITH GOVERNING AUTHORITIES. IT
SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR (OR PERMIT HOLDER) TO
ENSURE EROSION CONTROL MEASURES ARE PROPERLY MAINTAINED AND
FOLLOWED.
4.CONTRACTOR SHALL IMPLEMENT THE APPROPRIATE EROSION CONTROL
MEASURES ACCORDING THE CONSTRUCTION SEQUENCING AND LEVEL OF SITE
STABILIZATION.
5.CONTRACTOR SHALL IMPLEMENT APPROPRIATE INLET PROTECTION FOR ALL
STORM DRAINS, SWALES, UNTIL SITE IS FULLY STABILIZED.
6.INLET PROTECTION SHALL BE ADAPTED, AS NECESSARY, TO THE SURROUNDING
SURFACE TYPE AND CONDITION (i.e., STAKE-DRIVEN WATTLES FOR BARE SOIL,
GRAVEL SOCKS FOR PAVEMENT, ETC.)
7.CONTRACTOR IS RESPONSIBLE FOR STABILIZING ALL SLOPES, PARTICULARLY
THOSE STEEPER THAN 6:1. CRIMP MULCHING, HYDRO MULCHING, EROSION MATS,
TEMPORARY IRRIGATION, AND ADDITIONAL WATTLES OR SILT FENCING MAY BE
NECESSARY TO ESTABLISH VEGETATIVE COVER AND STABILIZE THE SLOPE.
8.CONTRACTOR IS RESPONSIBLE FOR PREVENTING SEDIMENT FROM UNSTABILIZED
LANDSCAPE AREAS FROM MIGRATING ONTO AND ENTERING THE PERMEABLE
PAVER SYSTEMS UNTIL UPGRADIENT TRIBUTARY AREAS ARE FULLY STABILIZED.
9.CONTRACTOR SHALL IMPLEMENT APPROPRIATE PERIMETER PROTECTION FOR
AREAS DIRECTING DRAINAGE OFFSITE. PERIMETER PROTECTION SHALL BE
ADAPTED, AS NECESSARY, TO THE SURROUNDING SURFACE TYPE AND CONDITION
(i.e., STAKE-DRIVEN SEDIMENT CONTROL LOGS OR SILT FENCE FOR BARE SOIL,
GRAVEL SOCKS FOR PAVEMENT, ETC.)
10.FUELING FACILITIES SHALL BE LOCATED AT LEAST ONE HUNDRED (100) FEET FROM
NATURAL BODY OF WATER, WETLAND, NATURAL DRAINAGE WAY OR MANMADE
DRAINAGE WAY. THE FUEL TANKS AND FUELING AREA MUST BE SET IN A
CONTAINMENT AREA THAT WILL NOT ALLOW A FUEL SPILL TO DIRECTLY FLOW,
SEEP, RUN OFF, OR BE WASHED INTO A BODY OF WATER, WETLAND OR DRAINAGE
WAY.
11.CONSTRUCTION WASTE STORAGE (DUMPSTERS) AND PORTABLE SANITATION
UNITS (CONSTRUCTION TOILETS) SHALL BE LOCATED AT LEAST FIFTY (50) FEET
FROM ANY STORMWATER INLET, WETLAND, OR DRAINAGE WAY. SAID FACILITIES
MUST BE SET IN A CONTAINMENT AREA THAT WILL NOT ALLOW POLLUTANTS TO
DIRECTLY FLOW, SEEP, RUN OFF, OR BE WASHED INTO A BODY OF WATER,
WETLAND OR DRAINAGE WAY. DUMPSTERS SHALL BE LOCATED ON FLAT, STABLE
GROUND, AND CONSTRUCTION TOILETS SHALL BE STAKED DOWN.
12.THE CONTRACTOR AND ALL SUBCONTRACTORS WILL COOPERATE WITH THE CITY'S
CONSTRUCTION INSPECTORS BY CEASING OPERATIONS WHEN WINDS ARE OF
SUFFICIENT VELOCITY TO CREATE BLOWING DUST WHICH, IN THE INSPECTOR'S
OPINION, IS HAZARDOUS TO THE PUBLIC HEALTH AND WELFARE.
13.WHERE SEASONAL CONSTRAINTS (E.G., DURING SUMMER AND WINTER MONTHS)
INHIBIT PERMANENT SEEDING OPERATIONS, DISTURBED AREAS WILL BE TREATED
WITH MULCH AND MULCH TACKIFIER OR OTHER MATERIALS APPROVED BY
EROSION CONTROL STAFF TO PREVENT EROSION.
14.SEE LANDSCAPE PLANS FOR ADDITIONAL INFORMATION ON PLANTING,
REVEGETATION, HARDSCAPE AND OTHER PERMANENT SITE STABILIZATION
METHODS.
15.DIRT AND DEBRIS FROM CONSTRUCTION ACTIVITIES TRACKED ON CITY STREETS
SHALL BE KEPT TO A MINIMUM AND CLEANED IMMEDIATELY OR AT THE
SUGGESTION OF THE CITY'S EROSION CONTROL INSPECTOR.
16.CONTRACTOR SHALL KEEP CONSTRUCTION VEHICLES ENTERING AND EXITING SITE
TO A MINIMUM.
17.THE CONTRACTOR SHALL, AT ALL TIMES DURING AND AFTER SYSTEM
INSTALLATION, PREVENT SEDIMENT, DEBRIS, AND DIRT FROM ANY SOURCE FROM
ENTERING THE RAIN GARDEN SYSTEM OR THE SUBSURFACE TREATMENT SYSTEM.
LOOSE MATERIALS SHALL NOT BE STORED ON THE RAIN GARDEN AREA. MUD AND
SEDIMENT-LADEN RUNOFF SHOULD BE KEPT AWAY FROM THE RAIN GARDEN AREA.
TEMPORARILY DIVERT RUNOFF OR INSTALL SEDIMENT CONTROL MEASURES AS
NECESSARY TO REDUCE THE AMOUNT OF SEDIMENT RUN-ON TO THE RAIN
GARDEN SYSTEM.
PROPOSED CONTOUR
PROPOSED STORM SEWER
PROPOSED SWALE
EXISTING CONTOUR
PROPOSED CURB & GUTTER
PROPERTY BOUNDARY
SILT FENCE
ROCK SOCK
RIPRAP
1.CONTRACTOR SHALL IMMEDIATELY STABILIZE ALL DISTURBED SLOPES BY
CRIMP MULCHING OR SIMILAR METHODS.
2.SWMP ADMINISTRATOR:
Contact ________________________________
Company ________________________________
Address ________________________________
Phone________________________________
3.CONTRACTOR TO PROVIDE VEHICLE TRACKING CONTROL FOR CONCRETE
WASHOUT AREA IF ACCESS IS OFF PAVEMENT.
4.REFER TO THE PRELIMINARY DRAINAGE REPORT, DATED AUGUST 31, 2023 BY
NORTHERN ENGINEERING FOR ADDITIONAL INFORMATION.
5.REFER TO INLET SCHEDULE ON SHEET XX FOR CLARIFICATION FOR INLET AND
BASIN TYPES. SOME BASINS HAVE SOLID COVERS THEREFORE THEY DON'T
NEED INLET PROTECTION.
GENERAL NOTES:
WATTLE DIKE
CONCRETE WASH AREA
BALE INLET PROTECTION
SLOPE DRAIN
EROSION CONTROL FABRIC
LEGEND:
BALE OUTLET PROTECTION
INLET PROTECTION
VEHICLE TRACKING CONTROL PAD
SF
LIMIT OF DISTURBANCE LOD
PROPOSED STORM INLETS
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DFC NORTH FIELD LLC
981 LINDENMEIER ROAD
GRAHAM JOHN C / GINGER L
1100 E VINE DRIVE
E
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4' CONCRETE CULVERT
RUNDOWN
STORMTECH
MC-7200
SYSTEM
BUILDING 1000
BUILDING 2000
BUILDING 3000
BUILDING 4000
BUILDING 5000
BUILDING 6000
WATER QUALITY
BASIN w/ WEIR
WATER QUALITY
BASIN w/ WEIR
WATER QUALITY
BASIN w/ WEIR
TRACT A
D, U, EA
INLET TYPE R
(TYP.)
LANDSCAPE
DRAIN (TYP.)
AREA INLET (TYP.)
AREA INLET WITH
VEGETATED BUFFER
TREATMENT TRAIN
(BY OTHERS)
STORM DRAIN LINE A
SEE SHEET ST1
STORM DRAIN LINE C
SEE SHEET ST12
STORM MANHOLE
(TYP.)
NYOPLAST SOLID
GRATE COVER (TYP.)
LI
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CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU
DIG, GRADE, OR EXCAVATE FOR THE MARKING OF
UNDERGROUND MEMBER UTILITIES.
CALL UTILITY NOTIFICATION CENTER OF
COLORADO
Know what'sbelow.
before you dig.Call
R
NORTH
( IN FEET )
0
1 INCH = 50 FEET
50 50 100 150
TABLE OF CONSTRUCTION SEQUENCE AND BMP APPLICATION
Project: THE SAVOY
CONSTRUCTION PHASE MOBILIZATION DEMOLITION GRADING
BEST MANAGEMENT PRACTICES (BMPS)
STRUCTURAL "INSTALLATION"
Silt Fence Barriers *
Flow Barriers (Wattles) *
Inlet Filter Bags *
Vegetative
Temporary Seeding Planting
Mulching / Sealant
Permanent Seeding Planting
Sod Installation
Rolled Products : Netting / Blankets / Mats
Contour Furrows (Ripping / Disking)
Rock Bags *
UTILITIES
INSTALLATION
FLAT WORK
INSTALLATION LANDSCAPE DEMOBILIZATION
Vehicle Tracking Pad *
* All Temporary BMPs to be Removed once Construction is Complete
Any prior inlets that could use protecting
Any prior inlets that could use protecting
Anytime the site will sit dormant longer than 30 Days
Anytime the site will sit dormant longer than 30 Days
Anytime the site will sit dormant longer than 30 Days
Riprap
1.IT SHOULD BE NOTED THAT ANY EROSION CONTROL PLAN SERVES ONLY AS A
GUIDELINE TO THE CONTRACTOR. STAGING AND/OR PHASING OF BEST
MANAGEMENT PRACTICES (BMPs) IS EXPECTED. ADDITIONAL AND/OR DIFFERENT
BMPs FROM THOSE ORIGINALLY DEPICTED MAY BE NECESSARY DURING
CONSTRUCTION DUE TO CHANGING SITE CONDITIONS OR AS REQUIRED BY LOCAL
AUTHORITIES.
2.THIS EROSION CONTROL PLAN IS SCHEMATIC IN NATURE. AS SUCH, GRAPHICAL
SYMBOLS MAY NOT BE TO SCALE, NOR ARE THEY NECESSARILY SHOWN IN THEIR
EXACT LOCATION.
3.THE CONTRACTOR SHALL BE RESPONSIBLE FOR ALL PERMITTING (CITY, STATE
DISCHARGE PERMIT, ETC.) AND COMPLIANCE WITH GOVERNING AUTHORITIES. IT
SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR (OR PERMIT HOLDER) TO
ENSURE EROSION CONTROL MEASURES ARE PROPERLY MAINTAINED AND
FOLLOWED.
4.CONTRACTOR SHALL IMPLEMENT THE APPROPRIATE EROSION CONTROL
MEASURES ACCORDING THE CONSTRUCTION SEQUENCING AND LEVEL OF SITE
STABILIZATION.
5.CONTRACTOR SHALL IMPLEMENT APPROPRIATE INLET PROTECTION FOR ALL
STORM DRAINS, SWALES, UNTIL SITE IS FULLY STABILIZED.
6.INLET PROTECTION SHALL BE ADAPTED, AS NECESSARY, TO THE SURROUNDING
SURFACE TYPE AND CONDITION (i.e., STAKE-DRIVEN WATTLES FOR BARE SOIL,
GRAVEL SOCKS FOR PAVEMENT, ETC.)
7.CONTRACTOR IS RESPONSIBLE FOR STABILIZING ALL SLOPES, PARTICULARLY
THOSE STEEPER THAN 6:1. CRIMP MULCHING, HYDRO MULCHING, EROSION MATS,
TEMPORARY IRRIGATION, AND ADDITIONAL WATTLES OR SILT FENCING MAY BE
NECESSARY TO ESTABLISH VEGETATIVE COVER AND STABILIZE THE SLOPE.
8.CONTRACTOR IS RESPONSIBLE FOR PREVENTING SEDIMENT FROM UNSTABILIZED
LANDSCAPE AREAS FROM MIGRATING ONTO AND ENTERING THE PERMEABLE
PAVER SYSTEMS UNTIL UPGRADIENT TRIBUTARY AREAS ARE FULLY STABILIZED.
9.CONTRACTOR SHALL IMPLEMENT APPROPRIATE PERIMETER PROTECTION FOR
AREAS DIRECTING DRAINAGE OFFSITE. PERIMETER PROTECTION SHALL BE
ADAPTED, AS NECESSARY, TO THE SURROUNDING SURFACE TYPE AND CONDITION
(i.e., STAKE-DRIVEN SEDIMENT CONTROL LOGS OR SILT FENCE FOR BARE SOIL,
GRAVEL SOCKS FOR PAVEMENT, ETC.)
10.FUELING FACILITIES SHALL BE LOCATED AT LEAST ONE HUNDRED (100) FEET FROM
NATURAL BODY OF WATER, WETLAND, NATURAL DRAINAGE WAY OR MANMADE
DRAINAGE WAY. THE FUEL TANKS AND FUELING AREA MUST BE SET IN A
CONTAINMENT AREA THAT WILL NOT ALLOW A FUEL SPILL TO DIRECTLY FLOW,
SEEP, RUN OFF, OR BE WASHED INTO A BODY OF WATER, WETLAND OR DRAINAGE
WAY.
11.CONSTRUCTION WASTE STORAGE (DUMPSTERS) AND PORTABLE SANITATION
UNITS (CONSTRUCTION TOILETS) SHALL BE LOCATED AT LEAST FIFTY (50) FEET
FROM ANY STORMWATER INLET, WETLAND, OR DRAINAGE WAY. SAID FACILITIES
MUST BE SET IN A CONTAINMENT AREA THAT WILL NOT ALLOW POLLUTANTS TO
DIRECTLY FLOW, SEEP, RUN OFF, OR BE WASHED INTO A BODY OF WATER,
WETLAND OR DRAINAGE WAY. DUMPSTERS SHALL BE LOCATED ON FLAT, STABLE
GROUND, AND CONSTRUCTION TOILETS SHALL BE STAKED DOWN.
12.THE CONTRACTOR AND ALL SUBCONTRACTORS WILL COOPERATE WITH THE CITY'S
CONSTRUCTION INSPECTORS BY CEASING OPERATIONS WHEN WINDS ARE OF
SUFFICIENT VELOCITY TO CREATE BLOWING DUST WHICH, IN THE INSPECTOR'S
OPINION, IS HAZARDOUS TO THE PUBLIC HEALTH AND WELFARE.
13.WHERE SEASONAL CONSTRAINTS (E.G., DURING SUMMER AND WINTER MONTHS)
INHIBIT PERMANENT SEEDING OPERATIONS, DISTURBED AREAS WILL BE TREATED
WITH MULCH AND MULCH TACKIFIER OR OTHER MATERIALS APPROVED BY
EROSION CONTROL STAFF TO PREVENT EROSION.
14.SEE LANDSCAPE PLANS FOR ADDITIONAL INFORMATION ON PLANTING,
REVEGETATION, HARDSCAPE AND OTHER PERMANENT SITE STABILIZATION
METHODS.
15.DIRT AND DEBRIS FROM CONSTRUCTION ACTIVITIES TRACKED ON CITY STREETS
SHALL BE KEPT TO A MINIMUM AND CLEANED IMMEDIATELY OR AT THE
SUGGESTION OF THE CITY'S EROSION CONTROL INSPECTOR.
16.CONTRACTOR SHALL KEEP CONSTRUCTION VEHICLES ENTERING AND EXITING SITE
TO A MINIMUM.
17.THE CONTRACTOR SHALL, AT ALL TIMES DURING AND AFTER SYSTEM
INSTALLATION, PREVENT SEDIMENT, DEBRIS, AND DIRT FROM ANY SOURCE FROM
ENTERING THE RAIN GARDEN SYSTEM OR THE SUBSURFACE TREATMENT SYSTEM.
LOOSE MATERIALS SHALL NOT BE STORED ON THE RAIN GARDEN AREA. MUD AND
SEDIMENT-LADEN RUNOFF SHOULD BE KEPT AWAY FROM THE RAIN GARDEN AREA.
TEMPORARILY DIVERT RUNOFF OR INSTALL SEDIMENT CONTROL MEASURES AS
NECESSARY TO REDUCE THE AMOUNT OF SEDIMENT RUN-ON TO THE RAIN
GARDEN SYSTEM.
PROPOSED CONTOUR
PROPOSED STORM SEWER
PROPOSED SWALE
EXISTING CONTOUR
PROPOSED CURB & GUTTER
PROPERTY BOUNDARY
SILT FENCE
ROCK SOCK
RIPRAP
1.CONTRACTOR SHALL IMMEDIATELY STABILIZE ALL DISTURBED SLOPES BY
CRIMP MULCHING OR SIMILAR METHODS.
2.SWMP ADMINISTRATOR:
Contact ________________________________
Company ________________________________
Address ________________________________
Phone________________________________
3.CONTRACTOR TO PROVIDE VEHICLE TRACKING CONTROL FOR CONCRETE
WASHOUT AREA IF ACCESS IS OFF PAVEMENT.
4.REFER TO THE PRELIMINARY DRAINAGE REPORT, DATED AUGUST 31, 2023 BY
NORTHERN ENGINEERING FOR ADDITIONAL INFORMATION.
5.REFER TO INLET SCHEDULE ON SHEET XX FOR CLARIFICATION FOR INLET AND
BASIN TYPES. SOME BASINS HAVE SOLID COVERS THEREFORE THEY DON'T
NEED INLET PROTECTION.
GENERAL NOTES:
WATTLE DIKE
CONCRETE WASH AREA
BALE INLET PROTECTION
SLOPE DRAIN
EROSION CONTROL FABRIC
LEGEND:
BALE OUTLET PROTECTION
INLET PROTECTION
VEHICLE TRACKING CONTROL PAD
SF
LIMIT OF DISTURBANCE LOD
PROPOSED STORM INLETS
EXISTING STORM SEWER
TSALPOLYN
D
D D
ONOTPOLLTE
UCTILEIRON RAINSTOWATERWAYS
U
PROPOSED STORM MANHOLE
PROPOSED NYOPLAST SOLID GRATE COVER
EROSION CONTROL NOTES:
`
NORTHERNENGINEERING.COM | 970.221.4158 SWMP: THE CROWNE AT SUNIGA
FORT COLLINS | GREELEY APPENDIX
APPENDIX B
EROSION CONTROL DETAILS
EC4
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VTC
ROCK SOCK SECTION ROCK SOCK PLAN
ROCK SOCK JOINTING
GRADATION TABLE
SIEVE SIZE
MASS PERCENT
PASSING SQUARE
MESH SIEVES
NO. 4
2"100
1-1/2"90-100
1"20-55
3/4"0-15
3/8"0-5
MATCHES SPECIFICATIONS FOR NO. 4 COARSE AGGREGATE FOR
CONCRETE PER AASHTO M43. ALL ROCK SHALL BE FRACTURED FACE,
ALL SIDES
RS
001 CONCRETE WASHOUT AREA 002 ROCK SOCK 003 VEHICLE TRACKING PAD
004 SILT FENCE
SF
CWA
005 CURB INLET PROTECTION
IP
POSTS
PREASSEMBLED SILT FENCE POSTS SHALL OVERLAP
AT JOINTS SO THAT NO
GAPS EXIST IN SILT FENCE.
NOTE:
THICKNESS OF GEOTEXTILE
HAS BEEN EXAGGERATED.POST SHALL BE JOINED AS SHOWN, THEN
ROTATED 180° IN DIRECTION SHOWN AND
DRIVEN INTO THE GROUND.
SILT FENCE JOINTS
DRIVE POSTS VERTICALLY INTO THE GROUND TO A MINIMUM DEPTH OF 18".
EXCAVATE A TRENCH APPROXIMATELY 4" WIDE AND 4" DEEP ALONG THE
LINE OF POSTS AND UPSLOPE FROM THE BARRIER.
ANCHOR TRENCH SHALL BE EXCAVATED BY HAND, WITH TRENCHER, OR
WITH SILT FENCE INSTALLATION MACHINE. NO ROAD GRADERS, BACKHOES,
ETC. SHALL BE USED.
NOT LESS THAN THE BOTTOM 1' OF THE SILT FENCE FABRIC SHALL BE
BURIED IN THE TRENCH.
THE TRENCH SHALL BE COMPACTED BY HAND, WITH "JUMPING JACK" OR BY
WHEEL ROLLING. COMPACTION SHALL BE SUCH THAT THE SILT FENCE
RESISTS BEING PULLED OUT OF ANCHOR TRENCH BY HAND.
SILT FENCE INDICATED IN THE PLANS SHALL BE INSTALLED PRIOR TO ANY
LAND-DISTURBING ACTIVITIES.
USE WOOD POSTS OR OTHER MATERIAL AS ACCEPTED BY THE CITY.
INSTALLATION NOTES:
1.
2.
3.
4.
5.
6.
7.
THE CONTRACTOR SHALL INSPECT SILT FENCE EVERY TWO WEEKS AND
AFTER SIGNIFICANT STORM EVENTS AND MAKE REPAIRS OR CLEAN OUT
UPSTREAM SEDIMENT AS NECESSARY.
SEDIMENT ACCUMULATED UPSTREAM OF SILT FENCE SHALL BE REMOVED
WHEN THE UPSTREAM SEDIMENT REACHES A DEPTH OF 6".
SILT FENCE SHALL BE REMOVED WHEN THE UPSTREAM DISTURBED AREA IS
STABILIZED AND GRASS COVER IS ACCEPTED BY THE CITY. IF ANY
DISTURBED AREA EXISTS AFTER REMOVAL, IT SHALL BE SEEDED AND
MULCHED OR OTHERWISE STABILIZED IN A MANNER ACCEPTED BY THE CITY.
MAINTENANCE NOTES:
1.
2.
3.
4" MIN.
4" MIN.
1 12" x 1 12" WOODEN FENCE POSTS
SF
006 SWALE WATTLE DIKE
CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU
DIG, GRADE, OR EXCAVATE FOR THE MARKING OF
UNDERGROUND MEMBER UTILITIES.
CALL UTILITY NOTIFICATION CENTER OF
COLORADO
Know what'sbelow.
before you dig.Call
R
Sheet
CR
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`
NORTHERNENGINEERING.COM | 970.221.4158 SWMP: THE CROWNE AT SUNIGA
FORT COLLINS | GREELEY APPENDIX
APPENDIX C
LANDSCAPE PLAN
`
NORTHERNENGINEERING.COM | 970.221.4158 SWMP: THE CROWNE AT SUNIGA
FORT COLLINS | GREELEY APPENDIX
APPENDIX D
PERMITS / APPLICATIONS
`
NORTHERNENGINEERING.COM | 970.221.4158 SWMP: THE CROWNE AT SUNIGA
FORT COLLINS | GREELEY APPENDIX
APPENDIX E
INSPECTION LOGS
`
NORTHERNENGINEERING.COM | 970.221.4158 SWMP: THE CROWNE AT SUNIGA
FORT COLLINS | GREELEY APPENDIX
APPENDIX F
CONTRACTOR INSERTS
T
12
'
'
W
12
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'
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12
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'
W
12
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'
W
12
'
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D
D
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D
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DFC NORTH FIELD LLC
981 LINDENMEIER ROAD
GRAHAM JOHN C / GINGER L
1100 E VINE DRIVE
E
E
E
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XXXXX
FD
C
DSDSDS
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
GAS METERS
GAS ME
T
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FDC
DS
DS
DS DS
DS
DSDS
DS
DSDSDSDS
DS
DS
DSDSDS
DSDS
DSDS
DS
DS
DS
DS
DS
DS
DSDS
DS
DS
DS
DS
DS
DS
DS
DS
DS
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DS
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DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
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DS
DS
DS
DS
DS
DS
DS
DS
GAS ME
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DS
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DSDS
DS
DS
DSDS
DS
DS
FD
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DSDS
DS
DS
DS
DS
DSDS
DS
DS
DS
DS
GAS METER
GAS METER
DS DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DSDSDS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DS
DSDS
DS
DS
DSDS
DS
DS
DS DS
DS
DS
DS
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DS
DS
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DS
DS
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DS
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DS
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G
G
SUNIGA ROAD
L
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M
A
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A
V
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N
U
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EXISTING NECCO
STORM LINE A4
EXISTING
STORM INLET
EXISTING STORM
MANHOLE
EXISTING
STORM INLET
EXISTING
STORM INLET
125'
ROW
EXISTING NECCO
BACKBONE STORM LINE A1
EXISTING STORM
MANHOLE
EXISTING
STORM INLET
EXISTING STORM
MANHOLE
UD UD UD UD UD UD UD UD UD UD UD UDMONITO
R
I
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W
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TRAFFIC R
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D
TF
TF
TF
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D
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U
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D D
ONOTPOLLTEUCTILEIRONRAINSTOWATERWAYS
U
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D D
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U
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D D
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U
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ONOTPOLLTEUCTILEIRONRAINSTOWATERWAYS
U
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D D
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U
TSALPOLYND
D D
ONOTPOLLTEUCTILEIRONRAINSTOWATERWAYS
U
TSALPOLYND
D D
ONOTPOLLTEUCTILEIRONRAINSTOWATERWAYS
U
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D D
ONOTPOLLTE
UCTILEIRONRAINSTOWATERWAYS
U
TSALPOLYND
D D
ONOTPOLLTEUCTILEIRONRAINSTOWATERWAYS
U
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D D
ONOTPOLLTE
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U
TSALPOLYND
D D
ONOTPOLLTE
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U
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D D
ONOTPOLLTEUCTILEIRONRAINSTOWATERWAYS
U
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D D
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U
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TSALPOLYND
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U
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U
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4' CONCRETE CULVERT
RUNDOWN
STORMTECH
MC-7200
SYSTEM
BUILDING 1000
BUILDING 2000
BUILDING 3000
BUILDING 4000
BUILDING 5000
BUILDING 6000
WATER QUALITY
BASIN w/ WEIR
WATER QUALITY
BASIN w/ WEIR
WATER QUALITY
BASIN w/ WEIR
TRACT A
D, U, EA
INLET TYPE R
(TYP.)
LANDSCAPE
DRAIN (TYP.)
AREA INLET (TYP.)
AREA INLET WITH
VEGETATED BUFFER
TREATMENT TRAIN
(BY OTHERS)
STORM DRAIN LINE A
SEE SHEET xx
STORM DRAIN LINE C
SEE SHEET xx
STORM MANHOLE
(TYP.)
NYOPLAST SOLID
GRATE COVER (TYP.)
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CALL 2 BUSINESS DAYS IN ADVANCE BEFORE YOU
DIG, GRADE, OR EXCAVATE FOR THE MARKING OF
UNDERGROUND MEMBER UTILITIES.
CALL UTILITY NOTIFICATION CENTER OF
COLORADO
Know what'sbelow.
before you dig.Call
R
NORTH
( IN FEET )
0
1 INCH = 50 FEET
50 50 100 150
TABLE OF CONSTRUCTION SEQUENCE AND BMP APPLICATION
Project: THE SAVOY
CONSTRUCTION PHASE MOBILIZATION DEMOLITION GRADING
BEST MANAGEMENT PRACTICES (BMPS)
STRUCTURAL "INSTALLATION"
Silt Fence Barriers *
Flow Barriers (Wattles) *
Inlet Filter Bags *
Vegetative
Temporary Seeding Planting
Mulching / Sealant
Permanent Seeding Planting
Sod Installation
Rolled Products : Netting / Blankets / Mats
Contour Furrows (Ripping / Disking)
Rock Bags *
UTILITIES
INSTALLATION
FLAT WORK
INSTALLATION LANDSCAPE DEMOBILIZATION
Vehicle Tracking Pad *
* All Temporary BMPs to be Removed once Construction is Complete
Any prior inlets that could use protecting
Any prior inlets that could use protecting
Anytime the site will sit dormant longer than 30 Days
Anytime the site will sit dormant longer than 30 Days
Anytime the site will sit dormant longer than 30 Days
Riprap
1.IT SHOULD BE NOTED THAT ANY EROSION CONTROL PLAN SERVES ONLY AS A
GUIDELINE TO THE CONTRACTOR. STAGING AND/OR PHASING OF BEST
MANAGEMENT PRACTICES (BMPs) IS EXPECTED. ADDITIONAL AND/OR DIFFERENT
BMPs FROM THOSE ORIGINALLY DEPICTED MAY BE NECESSARY DURING
CONSTRUCTION DUE TO CHANGING SITE CONDITIONS OR AS REQUIRED BY LOCAL
AUTHORITIES.
2.THIS EROSION CONTROL PLAN IS SCHEMATIC IN NATURE. AS SUCH, GRAPHICAL
SYMBOLS MAY NOT BE TO SCALE, NOR ARE THEY NECESSARILY SHOWN IN THEIR
EXACT LOCATION.
3.THE CONTRACTOR SHALL BE RESPONSIBLE FOR ALL PERMITTING (CITY, STATE
DISCHARGE PERMIT, ETC.) AND COMPLIANCE WITH GOVERNING AUTHORITIES. IT
SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR (OR PERMIT HOLDER) TO
ENSURE EROSION CONTROL MEASURES ARE PROPERLY MAINTAINED AND
FOLLOWED.
4.CONTRACTOR SHALL IMPLEMENT THE APPROPRIATE EROSION CONTROL
MEASURES ACCORDING THE CONSTRUCTION SEQUENCING AND LEVEL OF SITE
STABILIZATION.
5.CONTRACTOR SHALL IMPLEMENT APPROPRIATE INLET PROTECTION FOR ALL
STORM DRAINS, SWALES, UNTIL SITE IS FULLY STABILIZED.
6.INLET PROTECTION SHALL BE ADAPTED, AS NECESSARY, TO THE SURROUNDING
SURFACE TYPE AND CONDITION (i.e., STAKE-DRIVEN WATTLES FOR BARE SOIL,
GRAVEL SOCKS FOR PAVEMENT, ETC.)
7.CONTRACTOR IS RESPONSIBLE FOR STABILIZING ALL SLOPES, PARTICULARLY
THOSE STEEPER THAN 6:1. CRIMP MULCHING, HYDRO MULCHING, EROSION MATS,
TEMPORARY IRRIGATION, AND ADDITIONAL WATTLES OR SILT FENCING MAY BE
NECESSARY TO ESTABLISH VEGETATIVE COVER AND STABILIZE THE SLOPE.
8.CONTRACTOR IS RESPONSIBLE FOR PREVENTING SEDIMENT FROM UNSTABILIZED
LANDSCAPE AREAS FROM MIGRATING ONTO AND ENTERING THE PERMEABLE
PAVER SYSTEMS UNTIL UPGRADIENT TRIBUTARY AREAS ARE FULLY STABILIZED.
9.CONTRACTOR SHALL IMPLEMENT APPROPRIATE PERIMETER PROTECTION FOR
AREAS DIRECTING DRAINAGE OFFSITE. PERIMETER PROTECTION SHALL BE
ADAPTED, AS NECESSARY, TO THE SURROUNDING SURFACE TYPE AND CONDITION
(i.e., STAKE-DRIVEN SEDIMENT CONTROL LOGS OR SILT FENCE FOR BARE SOIL,
GRAVEL SOCKS FOR PAVEMENT, ETC.)
10.FUELING FACILITIES SHALL BE LOCATED AT LEAST ONE HUNDRED (100) FEET FROM
NATURAL BODY OF WATER, WETLAND, NATURAL DRAINAGE WAY OR MANMADE
DRAINAGE WAY. THE FUEL TANKS AND FUELING AREA MUST BE SET IN A
CONTAINMENT AREA THAT WILL NOT ALLOW A FUEL SPILL TO DIRECTLY FLOW,
SEEP, RUN OFF, OR BE WASHED INTO A BODY OF WATER, WETLAND OR DRAINAGE
WAY.
11.CONSTRUCTION WASTE STORAGE (DUMPSTERS) AND PORTABLE SANITATION
UNITS (CONSTRUCTION TOILETS) SHALL BE LOCATED AT LEAST FIFTY (50) FEET
FROM ANY STORMWATER INLET, WETLAND, OR DRAINAGE WAY. SAID FACILITIES
MUST BE SET IN A CONTAINMENT AREA THAT WILL NOT ALLOW POLLUTANTS TO
DIRECTLY FLOW, SEEP, RUN OFF, OR BE WASHED INTO A BODY OF WATER,
WETLAND OR DRAINAGE WAY. DUMPSTERS SHALL BE LOCATED ON FLAT, STABLE
GROUND, AND CONSTRUCTION TOILETS SHALL BE STAKED DOWN.
12.THE CONTRACTOR AND ALL SUBCONTRACTORS WILL COOPERATE WITH THE CITY'S
CONSTRUCTION INSPECTORS BY CEASING OPERATIONS WHEN WINDS ARE OF
SUFFICIENT VELOCITY TO CREATE BLOWING DUST WHICH, IN THE INSPECTOR'S
OPINION, IS HAZARDOUS TO THE PUBLIC HEALTH AND WELFARE.
13.WHERE SEASONAL CONSTRAINTS (E.G., DURING SUMMER AND WINTER MONTHS)
INHIBIT PERMANENT SEEDING OPERATIONS, DISTURBED AREAS WILL BE TREATED
WITH MULCH AND MULCH TACKIFIER OR OTHER MATERIALS APPROVED BY
EROSION CONTROL STAFF TO PREVENT EROSION.
14.SEE LANDSCAPE PLANS FOR ADDITIONAL INFORMATION ON PLANTING,
REVEGETATION, HARDSCAPE AND OTHER PERMANENT SITE STABILIZATION
METHODS.
15.DIRT AND DEBRIS FROM CONSTRUCTION ACTIVITIES TRACKED ON CITY STREETS
SHALL BE KEPT TO A MINIMUM AND CLEANED IMMEDIATELY OR AT THE
SUGGESTION OF THE CITY'S EROSION CONTROL INSPECTOR.
16.CONTRACTOR SHALL KEEP CONSTRUCTION VEHICLES ENTERING AND EXITING SITE
TO A MINIMUM.
17.THE CONTRACTOR SHALL, AT ALL TIMES DURING AND AFTER SYSTEM
INSTALLATION, PREVENT SEDIMENT, DEBRIS, AND DIRT FROM ANY SOURCE FROM
ENTERING THE RAIN GARDEN SYSTEM OR THE SUBSURFACE TREATMENT SYSTEM.
LOOSE MATERIALS SHALL NOT BE STORED ON THE RAIN GARDEN AREA. MUD AND
SEDIMENT-LADEN RUNOFF SHOULD BE KEPT AWAY FROM THE RAIN GARDEN AREA.
TEMPORARILY DIVERT RUNOFF OR INSTALL SEDIMENT CONTROL MEASURES AS
NECESSARY TO REDUCE THE AMOUNT OF SEDIMENT RUN-ON TO THE RAIN
GARDEN SYSTEM.
EROSION CONTROL NOTES:
PROPOSED CONTOUR
PROPOSED STORM SEWER
PROPOSED SWALE
EXISTING CONTOUR
PROPOSED CURB & GUTTER
PROPERTY BOUNDARY
SILT FENCE
ROCK SOCK
RIPRAP
1.CONTRACTOR SHALL IMMEDIATELY STABILIZE ALL DISTURBED SLOPES BY
CRIMP MULCHING OR SIMILAR METHODS.
2.SWMP ADMINISTRATOR:
Contact ________________________________
Company ________________________________
Address ________________________________
Phone________________________________
3.CONTRACTOR TO PROVIDE VEHICLE TRACKING CONTROL FOR CONCRETE
WASHOUT AREA IF ACCESS IS OFF PAVEMENT.
4.REFER TO THE PRELIMINARY DRAINAGE REPORT, DATED AUGUST 31, 2023 BY
NORTHERN ENGINEERING FOR ADDITIONAL INFORMATION.
5.REFER TO INLET SCHEDULE ON SHEET XX FOR CLARIFICATION FOR INLET AND
BASIN TYPES. SOME BASINS HAVE SOLID COVERS THEREFORE THEY DON'T
NEED INLET PROTECTION.
GENERAL NOTES:
WATTLE DIKE
CONCRETE WASH AREA
BALE INLET PROTECTION
SLOPE DRAIN
EROSION CONTROL FABRIC
LEGEND:
BALE OUTLET PROTECTION
INLET PROTECTION
VEHICLE TRACKING CONTROL PAD
SF
LIMIT OF DISTURBANCE LOD
PROPOSED STORM INLETS
EXISTING STORM SEWER
TSALPOLYN
D
D D
ONOTPOLLTE
UCTILEIRON
RAINSTOWATERWAYS
U
PROPOSED STORM MANHOLE
PROPOSED NYOPLAST SOLID GRATE COVER