HomeMy WebLinkAboutSNOW RIDGE APARTMENTS - FDP240003 - SUBMITTAL DOCUMENTS - ROUND 1 - Stormwater Management Plan
STORMWATER MANAGEMENT PLAN
SNOW RIDGE APARTMENTS
FORT COLLINS, COLORADO
APRIL 3, 2024
Project Number: 2047-001
NORTHERNENGINEERING.COM
970.221.4158
FORT COLLINS
GREELEY
NORTHERNENGINEERING.COM | 970.221.4158 SWMP: SNOW RIDGE APARTMENTS
FORT COLLINS | GREELEY
April 3, 2024
City of Fort Collins
Stormwater Development Review
700 Wood Street
Fort Collins, CO 80521
RE: STORMWATER MANAGEMENT PLAN
SNOW RIDGE APARTMENTS
To Whom It May Concern:
Northern Engineering Services, Inc. is pleased to submit this Stormwater Management Plan for the Snow Ridge
Apartments 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 Amanda Poincelot
Project Engineer Project Manager
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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 ............................................................................................4
3.1 OBJECTIVES ............................................................................................................................................. 4
3.2 SMWP AVAILABILITY................................................................................................................................. 4
3.3 DEFINITIONS ............................................................................................................................................ 4
3.4 ADDITIONAL PERMITTING ....................................................................................................................... 4
4.0 ENVIRONMENTAL IMPACT ............................................................................................4
5.0 POTENTIAL POLLUTION SOURCES .................................................................................5
5.1 DISTURBED AND STORED SOILS ............................................................................................................. 5
5.2 VEHICLE TRACKING OF SEDIMENT .......................................................................................................... 6
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 .................................................................... 20
9.0 REFERENCES ............................................................................................................ 21
FIGURES AND TABLES
FIGURE 1 – VICINITY MAP.................................................................................................................................... 1
TABLE 1 – PRELIMINARY PERMIT AND CONSTRUCTION SCHEDULE ............................................................... 17
TABLE 2 – CITY OF FORT COLLINS UPLAND 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
A replat of Tract A, Brookfield First Replat, located in the northeast Quarter of Section 4, Township 6
North, Range 68 West of the 6th Principal Meridian, City of Fort Collins, County of Larimer, State of
Colorado. More specifically it is 8.34-acres of land ¼ mile south of east Harmony Road, bound on the east
by Cinquefoil Lane, on the west by Brookfield Drive, and the south by Precision Drive.
1.2 NATURE OF CONSTRUCTION ACTIVITY
The project includes the construction of an 8-unit complex. Consisting of a conversion of the existing
residential structure to a 2-unit complex and the addition of (3) 2-unit interconnected structures. Other
proposed improvements include a new drive isle consisting of concrete and permeable pavers, new
sidewalks and new landscaping, a mailroom with bike storage, outdoor bike parking, trash enclosure,
and a patio common area. Standard water quality, LID, and all associated storm infrastructure will be
provided with this project. Detention will be provided on-site in the Pond on the east side of site. Utilities
will be installed with the construction of Snow Ridge Apartments.
Figure 1 – Vicinity Map
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1.3 SITE DISTURBANCE
The site disturbance will occur across roughly 10.29 acres. It is recommended that existing site condition
photos be taken prior to the demolition.
CALCULATIONS CHART
TOTAL DISTURBED PROJECT AREA 0.72 ACRES
TOTAL "ONSITE" AREA OF DISTURBANCE 0.67 ACRES
TOTAL "OFFSITE" AREA OF DISTURBANCE 0.05 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 ~35% DENSITY
EXISTING SOIL TYPE C
APPROX. GROUNDWATER DEPTH 17 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 5:2 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 PLS Corporation in July 2023.
A NRCS Custom Soil Resource Report of the property indicates that the soil on site is composed entirely
of Altvan-Satanta loams with slopes of 3 – 9 percent. Altvan-Satanta loam is considered well drained and
is hydrologic Soil Group B.
NRCS indicates a wind erodibility rating of 5 (of a scale of 1 to 8, 1 is most susceptible to erosion), and as
such this site does has a median to low 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 groundcover consists of grass with tree cover, a residential structure, and an asphalt
driveway. The existing on-site runoff of the western two thirds of the property generally drains from the
east-to-southwest where it sheet flows to the adjacent properties to the south and west. The existing on-
site runoff of the eastern third of the property generally drains from the west-to-east across moderately
flat grades (e.g., <6.00%) onto Shields Street. From there, the drainage continues to Prospect Road, and
is received by the New Mercer Canal.
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1.5 RECEIVING WATERS
The Snow Ridge Apartments will have two outfall locations. The majority of the site will be released from
the detention pond on the east side of the site to the flow line of South Shields Street. A small portion of
flow will maintain existing flow patterns discharging southwest via sheet flow to the flow line of South
Shields Street. Another small portion of the site will discharge southwest of the site maintaining historic
drainage patterns. From there, the drainage continues to Prospect Road, and is received by the New
Mercer Canal.
1.6 EXISTING SITE CONDITIONS AND VEGETATION
The existing groundcover consists of grass with tree cover, a residential structure, and an asphalt
driveway. The remainder of the site is comprised of grass.
There is not a significant amount of grade change on the site.
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 September 2023 by Soillogic Inc. within various borings (see
attached Subsurface Exploration Report). At the time of measurement (September 14, 2023),
groundwater depth was approximately 17’ 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 of the existing asphalt pavement within the existing driveway, the removal of
approximately 530 sf of the existing residential building, the removal of a portion of the existing sidewalk
along South Shields Street, the removal of existing concrete around the existing residential building, and
the removal of some existing fence and trees on the site. Saw cuts will be made and asphalt will be
removed for utility tie ins on South Shields Street. 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 and
water quality pond will commence. Next, utility installation including sanitary sewer service, water
service, fire service, electric service, and storm sewer. Construction of the proposed buildings is
expected to begin once the storm sewer is in place. New curb/gutter, water quality pavers, drive paving,
and sidewalks 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.
Earthwork import is expected.
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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.
This report summarizes the Stormwater Management Plan for the construction activity that will occur
with Snow Ridge Apartments 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, as
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.
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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
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 0.72 acres of the site 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 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 stock pile 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).
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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 north side of the site
and east side of the site. Vehicle access will be limited on muddy days (site management 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
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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 connex 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.
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
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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
within the inside of the structure, where external use is concerned these materials will be stored in the
construction connex 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 connex 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 tradesmen) shall clean out equipment within the washout area so
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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).
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, materials 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 pan 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 trench 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.
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Collected slurry and cuttings shall be disposed of in a manner that does not violate groundwater or
surface water standards.
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 2023 by Soilslogic, Inc., ground water levels indicate
that it may be present during construction activities at approximately 17’ deep. If encountered,
dewatering activities may be required. Groundwater has in most excavations mixed with the dirt and as
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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
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: Matthew Deault
Company: MMD Built LLC
Phone: (303) 931-9295
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 actual 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.
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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
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 property boundary. Refer to the Erosion Control Plan
(Sheet EC1) 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 (Sheets EC1 – EC3) for additional
clarification.
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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 openings in
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.
During the initial and interim phases of Erosion Control the suggested location of the vehicle tracking
pad is at the east entrance of 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, sidewalk chases and upstream flared end sections shall have inlet protection.
Refer to the Erosion Control Plan (Sheets EC1 – EC3) for additional clarification.
Erosion Control Blankets (Phase II)
A temporary degradable rolled erosion control product composed of natural flexible fibers shall be used
on all seeded slopes 4:1 and greater (excluding mulched shrub bed areas). Erosion control blankets
should be utilized to provide erosion control and to facilitate vegetation establishment. During
installation, it is important to ensure that no gaps or voids exist under the material and that all corners of
the material are secured using stakes and trenching. Stakes should be made of materials that are
biodegradable. Continuous contact between the product and the soil is necessary to avoid failure.
Erosion Control Blankets should be inspected regularly for signs of erosion, including beneath the mat.
If voids are apparent, they should be filled with suitable soil. Inspections should also identify loose or
damaged stakes, as well as loose portions of the blanket. If deficiencies are found, they should be
repaired or replaced.
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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.
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 the proposed drive on the east side 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 will 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 Ripley Design. 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.
Trees that are to remain after construction is complete must be protected. Most tree roots grow within
the top 12”-18” of soil, and soil compaction is a significant threat to tree health. As such, particular care
should be taken to avoid activities within the drip-line of the tree. Direct equipment damage should also
be prevented. The most effective way to ensure the health of trees is to establish a protection zone at
the drip-line of the tree to prevent unintended activity in the area directly surrounding the tree.
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Fencing should be inspected and repaired when needed. If damage occurs to a tree, an arborist should
be consulted on how to care for the tree. If a tree is damage beyond repair, the City Forester should be
consulted on remediation measures.
At a minimum, protection to all trees identified for retention on the plans by Ripley Design.
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.
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 thousand 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 for applying wood chip mulch to all planted trees and shrubs as shown on
the Landscape Plan prepared by Ripley Design.
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
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truck or irrigation/sprinkler system to wet the top layer of disturbed soil, seeding and mulching, soil
binders, or wind fences.
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.
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 after 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
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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 1 – 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
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.
TASK BEGINNING
DATE ENDING DATE "BMP-PHASE OF
DEVELOPMENT"
Development Construction Permit
Issued by City of Fort Collins Jul. 2024 Aug. 2024 I
Overlot Grading (Demolition)Jul. 2024 Aug. 2024
I
Utility Installation Aug. 2024
Sept. 2024 II
Paving and Vertical Construction Sept. 2024 April 2025 III
Final Stabilization April 2025 June 2025 IV
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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: SNOW RIDGE APARTMENTS
FORT COLLINS | GREELEY 20 | 21
Table 2 – 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 bio-retention basins. The bio-
retention basins will remove suspended sediment and pollutants from developed run-off before entering
drainage facilities downstream of the site.
After stabilization, before project closure, all sediment shall be removed from storm piping per FCDCM
Chapter 2 Section 6.1.4.9.
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.
8.0 ADDITIONAL SWMP AND BMP RESOURCES
Mile High Flood District
Urban Storm Drainage Criteria Manual - Volume 3 “Best Management Practices”
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
`
NORTHERNENGINEERING.COM | 970.221.4158 SWMP: SNOW RIDGE APARTMENTS
FORT COLLINS | GREELEY 21 | 21
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 Snow Ridge Apartments, Northern Engineering, April 3rd, 2024 (NE Project No.
2047-001)
2. 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.
3. 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
4. Larimer County Urban Area Street Standards, Adopted January 2, 2001, Repealed and Reenacted,
Effective October 1, 2002, Repealed and Reenacted, Effective April 1, 2007
5. Soil Resource Report for Larimer County Area, Colorado, Natural Resources Conservation Service,
United States Department of Agriculture.
6. Urban Storm Drainage Criteria Manual, Volumes 1-3, Mile High Flood Control District, Wright-
McLaughlin Engineers, Denver, Colorado, Revised April 2008.
`
NORTHERNENGINEERING.COM | 970.221.4158 SWMP: SNOW RIDGE APARTMENTS
FORT COLLINS | GREELEY APPENDIX
APPENDIX A
SITE MAPS
MBMBMB
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/ / / / / / / // / / / / / / /
XXXX
/ / / / / / / /
/ / / / / / / // / / / / / / // / / / / / / /
XXXXXXXXX
X
X
X
X
H Y D
LOD LOD
LO
D
LODLOD
LO
D
LOD
LOD LOD
LO
D
LODLOD
LO
D
LO
D
LOD
LO
D
LODLODLODLODLODLODLODLODLODLODLODLODLODLOD
LO
D
LO
D
LO
D
LO
D
LO
D
LOD LOD LOD LOD LOD LOD LOD LOD LOD LOD LOD LOD LOD LOD LOD
LO
D
LOD
LO
D
LODLO
D
SFSFSFSFSFSFSFSFSFSFSFSFSFSF
SF
SF
SF
SF
SF
SF SF SF SF SF SF SF SF SF SF SF SF SF SF
SF
SF
SF
SF
SF
± 775 LF SILT FENCE
SO
U
T
H
S
H
I
E
L
D
S
S
T
R
E
E
T
LIMITS OF
CONVENTIONAL
TOPO (TYP.)
OFFSITE CONTOURS PROVIDED
FOR REFERENCE ONLY
SO
U
T
H
S
H
I
E
L
D
S
S
T
R
E
E
T
LIMITS OF
CONVENTIONAL
TOPO (TYP.)
OFFSITE CONTOURS PROVIDED
FOR REFERENCE ONLY
Sheet
SN
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8
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 )
1 inch = ft.
Feet02020
20
40 60
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.NO MUD OR DEBRIS IS ALLOWED ON CITY STREETS. IF ANY DOES OCCUR,
CONTRACTOR SHALL SWEEP AND CLEAN IMMEDIATELY.
5.REFER TO THE FINAL DRAINAGE REPORT, DATED APRIL 3, 2023 BY NORTHERN
ENGINEERING FOR ADDITIONAL INFORMATION.
6.PAVER SYSTEM IS TO BE CONSTRUCTED AS PART OF THE LAST SEQUENCE OF
CONSTRUCTION TO MINIMIZE POTENTIAL FOR SEDIMENTATION.
7.FINAL STABILIZATION TO BE DONE IN ACCORDANCE WITH THE FINAL
LANDSCAPE PLAN.
GENERAL NOTES:
WATTLE DIKE
CONCRETE WASH AREA
SEDIMENT TRAP
BALE INLET PROTECTION
SLOPE DRAIN
EROSION CONTROL FABRIC
LEGEND:
BALE OUTLET PROTECTION
INLET PROTECTION
VEHICLE TRACKING CONTROL PAD
SF
LIMIT OF DISTURBANCE LOD
CITY OF FORT COLLINS UPLAND MIX SEED
CALCULATIONS CHART
TOTAL DISTURBED PROJECT AREA 0.72 ACRES
TOTAL "ONSITE" AREA OF DISTURBANCE 0.67 ACRES
TOTAL "OFFSITE" AREA OF DISTURBANCE 0.05 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 ~35%DENSITY
EXISTING SOIL TYPE C
APPROX. GROUNDWATER DEPTH 20 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 5:2 H:V
DISTANCE FROM A RIPARIAN AREA OR SENSITIVE AREA N/A FEET
MBMBMB
FO
FO
FO
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
X OHU OHU OHU
G
FO
FO
FO
X
X
X
X
X
X
G
G
G
G
G
G
G
E
E
E
E
E
15
"
S
S
15
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S
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15
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15
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S
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S
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15
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S
S
12
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12
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W
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12
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12
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12
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W
UD UD UD UD
UD
H Y D
LOD LOD
LO
D
LODLOD
LO
D
LOD
LOD LOD
LO
D
LODLOD
LO
D
LO
D
LOD
LO
D
LODLODLODLODLODLODLODLODLODLODLODLODLODLOD
LO
D
LO
D
LO
D
LO
D
LO
D
LOD LOD LOD LOD LOD LOD LOD LOD LOD LOD LOD LOD LOD LOD LOD
LO
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LOD
LO
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LODLO
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SFSFSFSFSFSFSFSFSFSFSFSFSFSF
SF
SF
SF
SF
SF
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SF
SF
SF
SF
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DETENTION POND 1
± 775 LF SILT FENCE
± 1,400 SF EROSION
CONTROL FABRIC
PROPOSED EMERGENCY
SPILLWAY LOCATION
PROPOSED POND
OUTLET STRUCTURE
PAVER 1
PROPOSED PERMEABLE
INTERLOCKING PAVERS
PAVER 2
PROPOSED PERMEABLE
INTERLOCKING PAVERS
PROPOSED SIDEWALK CHASE
PROPOSED SIDEWALK CHASE
PROPOSED SIDEWALK CHASE
PROPOSED 8'
CONCRETE PAN
PROPERTY BOUNDARY (TYP.)
PROPOSED 2'
CONCRETE PAN
LIMITS OF
CONVENTIONAL
TOPO (TYP.)
OFFSITE CONTOURS PROVIDED
FOR REFERENCE ONLY
PROPOSED UNDERDRAIN OUTFALL
WITH UPTURNED ELBOW
PROPOSED 2' U-CHANNEL
100-YR WSEL100-YR WSEL STORM DRAIN LINE B
SEE SHEET ST1
STORM DRAIN LINE A
SEE SHEET ST1
Sheet
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9
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 )
1 inch = ft.
Feet02020
20
40 60
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.NO MUD OR DEBRIS IS ALLOWED ON CITY STREETS. IF ANY DOES OCCUR,
CONTRACTOR SHALL SWEEP AND CLEAN IMMEDIATELY.
5.REFER TO THE FINAL DRAINAGE REPORT, DATED APRIL 3, 2023 BY NORTHERN
ENGINEERING FOR ADDITIONAL INFORMATION.
6.PAVER SYSTEM IS TO BE CONSTRUCTED AS PART OF THE LAST SEQUENCE OF
CONSTRUCTION TO MINIMIZE POTENTIAL FOR SEDIMENTATION.
7.FINAL STABILIZATION TO BE DONE IN ACCORDANCE WITH THE FINAL
LANDSCAPE PLAN.
GENERAL NOTES:
WATTLE DIKE
CONCRETE WASH AREA
SEDIMENT TRAP
BALE INLET PROTECTION
SLOPE DRAIN
EROSION CONTROL FABRIC
LEGEND:
BALE OUTLET PROTECTION
INLET PROTECTION
VEHICLE TRACKING CONTROL PAD
SF
LIMIT OF DISTURBANCE LOD
CITY OF FORT COLLINS UPLAND MIX SEED
CALCULATIONS CHART
TOTAL DISTURBED PROJECT AREA 0.72 ACRES
TOTAL "ONSITE" AREA OF DISTURBANCE 0.67 ACRES
TOTAL "OFFSITE" AREA OF DISTURBANCE 0.05 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 ~35%DENSITY
EXISTING SOIL TYPE C
APPROX. GROUNDWATER DEPTH 20 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 5:2 H:V
DISTANCE FROM A RIPARIAN AREA OR SENSITIVE AREA N/A FEET
MBMBMB
FO
FO
FO
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U
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U
X OHU OHU OHU
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FO
FO
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X
X
X
X
X
G
G
G
G
G
G
G
E
E
E
E
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15
"
S
S
15
"
S
S
15
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S
S
15
"
S
S
15
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S
S
15
"
S
S
12
"
W
12
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W
12
"
W
12
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W
12
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W
12
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W
UD UD UD UD
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SO
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DETENTION POND 1
LOD LOD
LODLODLOD
LO
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LOD LOD
LO
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LODLOD
LO
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LO
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LO
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LO
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LO
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LO
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LO
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LO
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LO
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LOD LOD LOD LOD LOD LOD LOD LOD LOD LOD LOD LOD LOD LOD
LO
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LOD
LO
D
LOD
LO
D
PROPOSED EMERGENCY
SPILLWAY LOCATION
PROPOSED POND
OUTLET STRUCTURE
PAVER 1
PROPOSED PERMEABLE
INTERLOCKING PAVERS
PAVER 2
PROPOSED PERMEABLE
INTERLOCKING PAVERS
PROPOSED SIDEWALK CHASE
PROPOSED SIDEWALK CHASE
PROPOSED SIDEWALK CHASE
PROPOSED 8'
CONCRETE PAN
PROPERTY BOUNDARY (TYP.)
PROPOSED 2'
CONCRETE PAN
LIMITS OF
CONVENTIONAL
TOPO (TYP.)
OFFSITE CONTOURS PROVIDED
FOR REFERENCE ONLY
PROPOSED UNDERDRAIN OUTFALL
WITH UPTURNED ELBOW
PROPOSED 2' U-CHANNEL
100-YR WSEL100-YR WSEL STORM DRAIN LINE B
SEE SHEET ST1
STORM DRAIN LINE A
SEE SHEET ST1
Sheet
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10
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 )
1 inch = ft.
Feet02020
20
40 60
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.NO MUD OR DEBRIS IS ALLOWED ON CITY STREETS. IF ANY DOES OCCUR,
CONTRACTOR SHALL SWEEP AND CLEAN IMMEDIATELY.
5.REFER TO THE FINAL DRAINAGE REPORT, DATED APRIL 3, 2023 BY NORTHERN
ENGINEERING FOR ADDITIONAL INFORMATION.
6.PAVER SYSTEM IS TO BE CONSTRUCTED AS PART OF THE LAST SEQUENCE OF
CONSTRUCTION TO MINIMIZE POTENTIAL FOR SEDIMENTATION.
7.FINAL STABILIZATION TO BE DONE IN ACCORDANCE WITH THE FINAL
LANDSCAPE PLAN.
GENERAL NOTES:
WATTLE DIKE
CONCRETE WASH AREA
SEDIMENT TRAP
BALE INLET PROTECTION
SLOPE DRAIN
EROSION CONTROL FABRIC
LEGEND:
BALE OUTLET PROTECTION
INLET PROTECTION
VEHICLE TRACKING CONTROL PAD
SF
LIMIT OF DISTURBANCE LOD
CITY OF FORT COLLINS UPLAND MIX SEED
CALCULATIONS CHART
TOTAL DISTURBED PROJECT AREA 0.72 ACRES
TOTAL "ONSITE" AREA OF DISTURBANCE 0.67 ACRES
TOTAL "OFFSITE" AREA OF DISTURBANCE 0.05 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 ~35%DENSITY
EXISTING SOIL TYPE C
APPROX. GROUNDWATER DEPTH 17 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 5:2 H:V
DISTANCE FROM A RIPARIAN AREA OR SENSITIVE AREA N/A FEET
MBMBMB
FO
FO
FO
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"
S
S
15
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15
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15
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S
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15
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S
S
15
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S
S
12
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W
12
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W
12
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12
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LOD LOD
LODLODLOD
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LOD LOD LOD LOD LOD LOD LOD LOD LOD LOD LOD LOD LOD LOD
LO
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LOD
LO
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LOD
LO
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PROPOSED EMERGENCY
SPILLWAY LOCATION
PROPOSED POND
OUTLET STRUCTURE
PAVER 1
PROPOSED PERMEABLE
INTERLOCKING PAVERS
PAVER 2
PROPOSED PERMEABLE
INTERLOCKING PAVERS
PROPOSED SIDEWALK CHASE
PROPOSED SIDEWALK CHASE
PROPOSED SIDEWALK CHASE
PROPOSED 8'
CONCRETE PAN
PROPERTY BOUNDARY (TYP.)
PROPOSED 2'
CONCRETE PAN
LIMITS OF
CONVENTIONAL
TOPO (TYP.)
OFFSITE CONTOURS PROVIDED
FOR REFERENCE ONLY
PROPOSED UNDERDRAIN OUTFALL
WITH UPTURNED ELBOW
PROPOSED 2' U-CHANNEL
100-YR WSEL100-YR WSEL STORM DRAIN LINE B
SEE SHEET ST1
STORM DRAIN LINE A
SEE SHEET ST1
Sheet
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10
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 )
1 inch = ft.
Feet02020
20
40 60
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.NO MUD OR DEBRIS IS ALLOWED ON CITY STREETS. IF ANY DOES OCCUR,
CONTRACTOR SHALL SWEEP AND CLEAN IMMEDIATELY.
5.REFER TO THE FINAL DRAINAGE REPORT, DATED APRIL 3, 2023 BY NORTHERN
ENGINEERING FOR ADDITIONAL INFORMATION.
6.PAVER SYSTEM IS TO BE CONSTRUCTED AS PART OF THE LAST SEQUENCE OF
CONSTRUCTION TO MINIMIZE POTENTIAL FOR SEDIMENTATION.
7.FINAL STABILIZATION TO BE DONE IN ACCORDANCE WITH THE FINAL
LANDSCAPE PLAN.
GENERAL NOTES:
WATTLE DIKE
CONCRETE WASH AREA
SEDIMENT TRAP
BALE INLET PROTECTION
SLOPE DRAIN
EROSION CONTROL FABRIC
LEGEND:
BALE OUTLET PROTECTION
INLET PROTECTION
VEHICLE TRACKING CONTROL PAD
SF
LIMIT OF DISTURBANCE LOD
CITY OF FORT COLLINS UPLAND MIX SEED
CALCULATIONS CHART
TOTAL DISTURBED PROJECT AREA 0.72 ACRES
TOTAL "ONSITE" AREA OF DISTURBANCE 0.67 ACRES
TOTAL "OFFSITE" AREA OF DISTURBANCE 0.05 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 ~35%DENSITY
EXISTING SOIL TYPE C
APPROX. GROUNDWATER DEPTH 17 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 5:2 H:V
DISTANCE FROM A RIPARIAN AREA OR SENSITIVE AREA N/A FEET
`
NORTHERNENGINEERING.COM | 970.221.4158 SWMP: SNOW RIDGE APARTMENTS
FORT COLLINS | GREELEY APPENDIX
APPENDIX B
EROSION CONTROL DETAILS
EC4
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11
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
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
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
005
SECTION G-G
G
PLAN
G
BOP
BALE OUTLET PROTECTION
Sheet
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3'-4'
ADJACENT ROLLS SHALL
TIGHTLY ABUT
W1 NOTES:
INSTALLATION:
WHEN INSTALLING RUNNING LENGTHS OF WATTLES, BUTT THE SECOND
WATTLE TIGHTLY AGAINST THE FIRST, DO NOT OVERLAP THE ENDS. STAKE
THE WATTLES AT EACH END AND FOUR FOOT ON CENTER. FOR EXAMPLE:
A 25 FOOT WATTLE USES 6 STAKES
A 20 FOOT WATTLE USES 5 STAKES
A 12 FOOT WATTLE USES 4 STAKES
STAKES SHOULD BE DRIVEN THROUGH THE MIDDLE OF THE WATTLE.
LEAVING 2 - 3 INCHES OF THE STAKE PROTRUDING ABOVE THE WATTLE. A
HEAVY SEDIMENT LOAD WILL TEND TO PICK THE WATTLE UP AND COULD
PULL IT OFF THE STAKES IF THEY ARE DRIVEN DOWN TOO LOW. IT MAY BE
NECESSARY TO MAKE A HOLE IN THE WATTLE WITH A PICK END OF YOUR
MADDOX IN ORDER TO GET THE STAKE THROUGH THE STRAW. WHEN
STRAW WATTLES ARE USED FOR FLAT GROUND APPLICATIONS, DRIVE THE
STAKES STRAIGHT DOWN; WHEN INSTALLING WATTLES ON SLOPES, DRIVE
THE STAKES PERPENDICULAR TO THE SLOPE.
DRIVE THE FIRST END STAKE OF THE SECOND WATTLE AT AN ANGLE
TOWARD THE FIRST WATTLE IN ORDER TO HELP ABUT THEM TIGHTLY
TOGETHER. IF YOU HAVE DIFFICULTY DRIVING THE STAKE INTO EXTREMELY
HARD OR ROCKY SLOPES, A PILOT BAR MAY BE NEEDED TO BEGIN THE
STAKE HOLE.
1"x 1" WOOD STAKES
18"-24"
BAILING WIRE OR
NYLON ROPE
WATTLE "A"WATTLE "B"
1'2'
TYP.
1'1'
W2 NOTES:
INSTALLATION:
STAKES SHOULD BE DRIVEN ACROSS FROM EACH OTHER
AND ON EACH SIDE OF THE WATTLE. LEAVING 4"-6" OF
STAKE PROTRUDING ABOVE THE WATTLE. BAILING WIRE OR
NYLON ROPE SHOULD BE TIED TO THE STAKES ACROSS
THE WATTLE. STAKES SHOULD THEN BE DRIVEN UNTIL THE
BAILING WIRE OR NYLON ROPE IS SUFFICIENTLY SNUG TO
THE WATTLE.
WHEN INSTALLING RUNNING LENGTHS OF WATTLES, TO
PREVENT SHIFTING, BUTT THE SECOND WATTLE TIGHTLY
AGAINST THE FIRST. DO NOT OVERLAP THE ENDS. STAKES
SHOULD BE DRIVEN 1 FT. FROM END, ACROSS FROM AND
ON EACH SIDE OF WATTLE LEAVING 4"-6" OF STAKE
PROTRUDING ABOVE THE WATTLE. BAILING WIRE OR
NYLON ROPE SHOULD BE TIED TO STAKES IN AN HOUR
GLASS FORMATION (FRONT TO BACK OF WATTLE "A",
ACROSS TO FRONT OF WATTLE "B", ACROSS TO BACK AND
BACK TO FRONT OF WATTLE "A"). STAKES SHOULD THEN BE
DRIVEN IN UNTIL BAILING WIRE OR NYLON ROPE IS
SUFFICIENTLY SNUG TO THE WATTLE.
SEDIMENT
DEPOSITION
ZONE
STORM WATER LINE
WEIGHTED WATTLE
LIP OF GUTTER
SIDEWALK EXISTING OR
PROPOSED INLET
TOP BACK CURB
FLOW LINE
SEDIMENT
DEPOSITION
ZONE
STORM WATER LINE
LIP OF GUTTER
WEIGHTED WATTLE
AT 45 DEG. TO CURB
SIDEWALK
TOP BACK CURB
FLOW LINE
SIDEWALK
TOP BACK CURB
FLOW LINE
W4 NOTES:
1. NUMBER OF WATTLES AND SPACING SHOULD BE DETERMINED BY THE SLOPE AND SITE CONDITIONS.
2. TUBULAR MARKERS SHALL MEET THE REQUIREMENTS OF MANUAL ON UNIFORM TRAFFIC CONTROL DEVICES (MUTCD)
3. CITY RECOMMENDS INSTALLING AT LEAST 3 CHECKDAMS WHEN USING THIS SETUP.
LIP OF GUTTER
WEIGHTED WATTLE
W1 & W2 INSTALLATION NOTES:
1. THE LOCATION AND LENGTH OF WATTLE IS DEPENDENT ON THE CONDITIONS OF EACH SITE.
2. WATTLES SHALL BE INSTALLED PRIOR TO ANY LAND-DISTURBING ACTIVITIES.
3. WATTLES SHALL CONSIST OF STRAW, COMPOST, EXCELSIOR, OR COCONUT FIBER.
4. NOT FOR USE IN CONCENTRATED FLOW AREAS.
5. THE WATTLES SHALL BE TRENCHED INTO THE GROUND A MINIMUM OF TWO (2) INCHES.
6. WATTLES SHALL BE INSTALLED PER MANUFACTURERS SPECIFICATIONS.
7. ON SLOPES, WATTLES SHOULD BE INSTALLED ON CONTOUR WITH A SLIGHT DOWNWARD ANGLE AT THE END OF THE ROW IN ORDER TO PREVENT
PONDING AT THE MID SECTION.
8. RUNNING LENGTHS OF WATTLES SHOULD BE ABUTTED FIRMLY TO ENSURE NO LEAKAGE AT THE ABUTMENTS.
9. SPACING - DOWNSLOPE:
VERTICAL SPACING FOR SLOPE INSTALLATIONS SHOULD BE DETERMINED BY SITE CONDITIONS. SLOPE GRADIENT AND SOIL TYPE ARE THE MAIN
FACTORS. A GOOD RULE OF THUMB IS:
1:1 SLOPES = 10 FEET APART
2:1 SLOPES = 20 FEET APART
3:1 SLOPES = 30 FEET APART
4:1 SLOPES = 40 FEET APART, ETC.
HOWEVER, ADJUSTMENTS MAY HAVE TO BE MADE FOR THE SOIL TYPE: FOR SOFT, LOAMY SOILS - ADJUST THE ROWS CLOSER TOGETHER;
FOR HARD, ROCKY SOILS - ADJUST THE ROWS FURTHER APART. A SECONDARY WATTLE PLACED BEHIND THE ABUTMENT OF TWO WATTLES IS
ENCOURAGED ON STEEP SLOPES OR WHERE JOINTS HAVE FAILED IN THE PAST.
10. STAKING: THE CITY RECOMMENDS USING WOOD STAKES TO SECURE THE WATTLES. 1/2" TO 5/8" REBAR IS ALSO ACCEPTABLE. BE SURE TO USE A
STAKE THAT IS LONG ENOUGH TO PROTRUDE SEVERAL INCHES ABOVE THE WATTLE: 18" IS A GOOD LENGTH FOR HARD, ROCKY SOIL. FOR SOFT
LOAMY SOIL USE A 24" STAKE.
4"-6" ABOVE WATTLE AFTER BAILING WIRE
OR NYLON ROPE IS ATTACHED. STAKES
NEED TO BE TAMPED UNTIL WIRE/ROPE IS
SNUG WITH WATTLE.
W3 NOTE:
IF THE AREA BEHIND THE INLET IS NOT STABILIZED, A
BMP SHOULD BE USED TO PREVENT SEDIMENT FROM
ENTERING THE INLET
1"x 1" WOOD STAKES
18"-24"
THE CONTRACTOR SHALL INSPECT WATTLES EVERY TWO WEEKS AND AFTER ANY SIGNIFICANT STORM EVENT AND MAKE REPAIRS OR REMOVE SEDIMENT
ACCUMULATED BEHIND WATTLE AS NECESSARY.
SEDIMENT ACCUMULATED BEHIND WATTLE SHALL BE REMOVED WHEN THE SEDIMENT HAS ACCUMULATED TO ONE HALF THE DIAMETER OF THE WATTLE.
WATTLES SHALL REMAIN IN PLACE UNTIL THE UPSTREAM DISTURBED AREA IS STABILIZED AND IS ACCEPTED BY THE CITY.
WATTLE MAINTENANCE NOTES:
1.
2.
3.
ENDS SHALL ABUT TIGHTLY
TO BACK OF CURB
END SHALL ABUT TIGHTLY
TO BACK OF CURB
ENDS OF ADJACENT WATTLES
SHALL BE TIGHTLY ABUTTED
TO PREVENT SEDIMENT BYPASS
4' MAX.
SEDIMENT
DEPOSITION ZONE
W2 NOTE:
ONLY WATTLES MADE WITH COCONUT
FIBERS SHALL BE USED WHEN
INSTALLATION COMES IN CONTACT WITH A
WATER BODY.
SIDEWALK CULVERT/CHASE/PAN
W3, W4 & W5 NOTES:
1. WHEN USING STRAW WATTLE, THE STRAW WATTLE MUST HAVE A WEIGHTED
CORE.
2. ALL PRODUCTS SHALL BE INSTALLED PER THE MANUFACTURER'S
SPECIFICATIONS.
3. OTHER PRODUCTS MAY BE USED IN PLACE OF WEIGHTED WATTLES UPON
WRITTEN APPROVAL FROM THE CITY. NOTE: A COPY OF DETAILS AND
SPECIFICATIONS WILL NEED TO BE INCORPORATED INTO THE SWMP.
END SHALL
TIGHTLY ABUT TO
BACK OF CURB
SEDIMENT
DEPOSITION ZONE
TUBULAR
MARKER
EXISTING OR
PROPOSED INLET END SHALL
TIGHTLY ABUT TO
BACK OF CURB
WATTLE INSTALLATION DETAIL007
AT PIPE OUTLET AREAS OF STREAMS AND
DRAINAGE CHANNELS - DETAIL A
IN DIVERSION DITCH OR SMALL DITCH DRAINAGE WAY - DETAIL B
OUTSIDE OF STREAMS AND DRAINAGE CHANNELS - DETAIL C
ANCHOR DETAILS
PERIMETER ANCHOR TRENCH
JOINT ANCHOR TRENCH
INTERMEDIATE ANCHOR TRENCH
OVERLAPPING JOINT
WOOD STAKE DETAIL
MINIMUM THICKNESS 1"
USE 2x4 MATERIAL FOR STAKES
JOINT ANCHOR
TRENCH, TYP.
PERIMETER
ANCHOR
TRENCH, TYP.
TOP OF
CHANNEL BANK
TYPE OF BLANKET AS INDICATED IN PLAN VIEW, IN ALL DISTURBED AREAS OF
STREAMS AND DRAINAGE CHANNELS TO DEPTH "D" ABOVE CHANNEL INVERT.
BLANKET SHALL GENERALLY BE ORIENTED PARALLEL TO FLOW DIRECTION.
STAKING PATTERN SHALL MATCH BLANKET TYPE.
UNDISTURBED
SOIL
TYPE OF BLANKET,
INDICATED IN PLAN VIEW PER MANUFACTURER SPEC. OR TYPE 2 OR 3 STAKING
(MATCH SPECIFIED BLANKET TYPE) SEE THE STAKING
PATTERNS DETAIL ON NEXT SHEET
PERIMETER
ANCHOR TRENCH, TYP.
JOINT ANCHOR TRENCH, TYP.
COMPACTED
SUBGRADE
1
>3
THE BLANKET SHALL
BE EXTENDED TO THE
TOP OF CHANNEL
"D
"
6
"
TO
P
S
O
I
L
"M"
OVERLAPPING JOINT, SEE
DETAIL ON THIS SHEET
STAGGER
OVERLAPS
PERIMETER ANCHOR TRENCH
SEE DETAIL ON THIS SHEET
PER MANUFACTURER SPEC.
OR TYPE 1 STAKING SEE
THE STAKING PATTERN
DETAIL ON NEXT SHEET
BLANKET SHALL BE
100% STRAW MIN.
DIVERSION DITCH
TYPICALLY AT
TOP OF SLOPE
6
"
TO
P
S
O
I
L
6" MIN.
(TYP.)
3" MIN.
(TYP.)
SINGLE EDGE
EROSION CONTROL
BLANKET (TYP.)
COMPACTED
BACKFILL (TYP.)
STAKE (TYP.)
TWO EDGES OF
TWO ADJACENT
ROLLS
LOOP FROM
MIDDLE OF
ROLL
FLOW 6"
3" MIN.
1
2
"
MI
N
.
STAKING PATTERNS
SHALL BE IN ACCORDANCE WITH MANUFACTURER'S SPECIFICATION. IF NO MANUFACTURER'S
SPECIFICATION IS AVAILABLE USE THE ACCEPTABLE STAKING PATTERN (AS SHOWN ABOVE)
PERIMETER ANCHOR
TRENCH OR JOINT
ANCHOR TRENCH, TYP.
STRAW-COCONUT
COCONUT OR EXCELSIOR
STRAW
ROLL WIDTH
"W" (TYP.)
6'
3'1/2 "W"
1/2 "W"
1/2 "W"
1/2 "W"
1/2 "W"
4'
3'
2'
EROSION CONTROL BLANKET TYPE
TYPE
STRAW*
STRAW-COCONUT
EXCELSIOR
COCONUT
CONTENT
-
30% MIN.
-
STRAW
CONTENT
100%
-
NETTING MIN.
DOUBLE/NATURAL
100%
-
-
EXCELSIOR
CONTENT
COCONUT --100%
* FOR OUTSIDE OF STREAMS AND DRAINAGE CHANNELS
DOUBLE/NATURAL
DOUBLE/NATURAL
DOUBLE/NATURAL
MAX.70%
EROSION CONTROL BLANKET006
VTC
EF
CWA
`
NORTHERNENGINEERING.COM | 970.221.4158 SWMP: SNOW RIDGE APARTMENTS
FORT COLLINS | GREELEY APPENDIX
APPENDIX C
LANDSCAPE PLAN
EM
GM
EEEEEEEEEE
E
WWWWWWWWWWWW
W
W
G
G
G
G G G G G G
G
G G
SSSSSSSSSSSSSSSSSSSSSSSSSS
UD UD UD UD UD UD UD UD UD
UD
UD
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WWW
WWWWWWWWW
W
S
WF
MBMBMB
FO
FO
FO
FO
FO
FO
OH
U
OH
U
OHU
OHU
OHU
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OH
U
OHU OHU OHU OHU OHU OHU OHU
G
FO
FO
FO
FO
FO
FO
FO
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PARCEL 9715418001
OWNER: BYRNE MICHAEL F, CATHERINE
NEIGHBORHOOD CONSERVATION,
BUFFER DISTRICT
PARCEL 9715418004
OWNER: RHT LLC
NEIGHBORHOOD CONSERVATION,
BUFFER DISTRICT
PA
R
C
E
L
9
7
1
5
4
1
8
0
1
0
O
W
N
E
R
:
M
I
L
L
E
R
J
E
R
A
L
D
B
Y
R
O
N
/
N
O
R
M
A
R
O
S
A
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I
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LO
W
D
E
N
S
I
T
Y
M
I
X
E
D
-
U
S
E
N
E
I
G
H
B
O
R
H
O
O
D
D
I
S
T
R
I
C
T
EXISTING BUILDING
(2) 2 BR UNITS)
ADDITION
(MAIL & BIKE
STORAGE)
MULTIFAMILY ADDITION
((2) 1 BR UNITS)
MULTIFAMILY ADDITION
((2) 2 BR UNITS)
MULTIFAMILY ADDITION
(2) 2 BR UNITS
PROPERTY BOUNDARY
PROPERTY BOUNDARY
S.
S
H
I
E
L
D
S
S
T
R
E
E
T
EXISTING TREE TO REMAIN
CRITICAL ROOT ZONE,
TYP.
DOWNSPOUTS, TYP.
RE: ARCH
LANDSCAPE
WALL, TYP.
PROPOSED PAD MOUNTED
TRANSFORMER, RE: CIVIL
M
M
M
M
M M M
M
M
M
M
M
M
M
M
1 - TAM
3 - PCE
1 - GTR
1 - CCO
5 - JSC
5 - JSB
5 - JSC
5 - JCH
5 - JSC
2 - JSB
1 - PVC
1 - PVC
2 - PPI
6 - PFG
3 - SBL
1 - SBL
3 - PFG
3 - PFG
1 - PPI
1 - PPI
1 - BTS
3 - PAT
5 - CAK
7 - SSP
5 - CAK7 - SSP
5 - CAK
5 - CAK
5 - CLA
7 - ACV
10 - CLA
3 - HPB
6 - HPB
3 - HPB
8 - CLA
5 - PFG
2 - SBL
10 - PFG
2 - SPE
5 - DTB
5 - DTB
6 - PAB
7 - SSI
6 - PAB
9 - PAB
6 - PAB
1 - DTB 2 - HPB
14 - CLA
6 - BTS
3 - VTB
7 - CLA
2 - VTB
5 - CLA
7 - ACV
6 - CLA
12 - ACV
7 - SSP
7 - SSP 5 - CAK
5 - CAK
7 - SSP
7 - SSP 17 - CAK
8 - PAB
8 - PAB
10 - ACV
2 - TAM
7 - CLA
3 - HPB
4 - ACV
9 - CLA
5 - ACV
5 - ACV
4 - NTE
21 - PAB
11 - NTE
8 - NTE
4 - JCH
1 - SPE
17 - PAB
4 - CLA
9 - ACV
5 - HPB
12 - ACV
3 - HPB
8 - ACV
11 - CLA
4 - PAB
7 - CAK
3 - CAK
4 - SSP
7 - HPB
3 - HPB
3 - HPB
10 - ACV
11 - CLA
16 - ACV
3 - HPB
5 - HPB
SS
G
E
W
FO
X
UD
W
G
SS
E
= EXISTING SANITARY SEWER
= EXISTING GAS LINE
= EXISTING ELECTRIC LINE
= EXISTING WATER LINE
= EXISTING FIBER OPTIC LINE
= EXISTING FENCE
= PROJECT BOUNDARY
= LOT LINE
= STORMWATER UTILITY
= WATER UTILITY
= GAS UTILITY
= SANITARY SEWER UTILITY
= ELECTRIC UTILITY
= UNDER DRAIN
= SETBACK
= RIGHT OF WAY
= EXISTING STORMWATER UTILITY
= PROPOSED GRADING
= TRANSFORMER, TYP.
WOOD MULCH
IRRIGATED TURF
ROCK MULCH
NATIVE SEED MIX
FOR RAIN GARDENS
CODE QTY COMMON NAME CONT CAL SIZE
CANOPY TREES
CCO 1 TURKISH FILBERT B & B 2"CAL
GTR 1 SKYLINE HONEY LOCUST B & B 2"CAL
TAM 3 REDMOND AMERICAN LINDEN B & B 2"CAL
EVERGREEN TREES
PPI 4 COLUMNAR COLORADO BLUE SPRUCE B & B 6` HT.
ORNAMENTAL TREES
PCE 3 COLUMNAR PURPLE PLUM B & B 2"CAL
PVC 2 CANADA RED CHOKECHERRY B & B 2"CAL
SPE 3 PEKING LILAC B & B 2"CAL
CODE QTY COMMON NAME SIZE HYDROZONE
DECIDUOUS SHRUBS
BTS 7 SPARKLE JAPANESE BARBERRY 5 GAL
DTB 11 ETERNAL FRAGRANCE DAPHNE 5 GAL
HPB 46 BOBO® PANICLE HYDRANGEA 5 GAL
PFG 27 GOLD DROP BUSH CINQUEFOIL 5 GAL
SBL 6 BLOOMERANG SERIES LILAC 5 GAL
VTB 5 BAILEY'S COMPACT CRANBERRYBUSH 5 GAL
EVERGREEN SHRUBS
JCH 9 HETZI COLUMN JUNIPER B & B
JSB 7 BLUE ARROW JUNIPER B & B
JSC 15 SKYROCKET JUNIPER B & B
ORNAMENTAL GRASSES
CAK 57 KARL FOERSTER FEATHER REED GRASS 1 GAL
CLA 97 NORTHERN SEA OATS 1 GAL
NTE 23 MEXICAN FEATHER GRASS 1 GAL
PAB 85 LITTLE BUNNY FOUNTAIN GRASS 1 GAL
SSP 46 PRAIRIE BLUES LITTLE BLUESTEM 1 GAL
PERENNIALS
ACV 105 VISION IN WHITE CHINESE ASTILBE 1 GAL
PAT 3 RUSSIAN SAGE 1 GAL
SSI 7 MT. ALBERT GOLDENROD 1 GAL
= COMMON ENTRANCE TO MULTIFAMILY BUILDING
DRAWING NUMBER:
ISSUED
PROJECT No.:
DRAWN BY:
REVIEWED BY:
SEAL:
PREPARED BY:
No.DESCRIPTION DATE
REVISIONS
No.DESCRIPTION DATE
Pl
o
t
t
e
d
B
y
:
Ev
a
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C
a
l
l
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La
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:
3
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Pr
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n
:
4/
2
/
2
0
2
4
8
:
1
9
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.
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ORIGINAL SIZE 24X36
ENT
I
T
L
E
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W
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NOT
F
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N
419 Canyon Ave. Suite 200 Fort Collins, CO 80521
phone 970.224.5828 | fax 970.225.6657 | www.ripleydesigninc.com
RIPLEY DESIGN INC.
Joel Weikert
419 Canyon Ave. Suite 200
Fort Collins, CO 80521
p. 970.498.2994
f. 970.225.6657
Matthew Deault
425 Pikes Peak Ave
Fort Collins, CO 80524
p. 303.931.9295
ENGINEER
ARCHITECT
LANDSCAPE ARCHITECT
NORTHERN ENGINEERING
Ryan Banning
301 N. Howes St. Ste 100
Fort Collins, CO 80521
p. 970.221.4158
JOHN DENGLER & ASSOCIATES
John Dengler
5336 Highcastle Ct.
Fort Collins, CO 80525
p. 970.223.1512
OWNER
OVERALL LANDSCAPE
FDP SUBMITTAL
SNOW RIDGE
APARTMENTS
04.03.2024FDP SUBMITTAL01
FORT COLLINS, CO
JW
EC
R23-020
3 OF 12
NORTH
0 05 10 20
SCALE: 1"=10'-0"
A PERMIT MUST BE OBTAINED FROM THE CITY FORESTER
BEFORE ANY TREES OR SHRUBS AS NOTED ON THIS PLAN
ARE PLANTED, PRUNED OR REMOVED IN THE PUBLIC
RIGHT-OF-WAY. THIS INCLUDES ZONES BETWEEN THE
SIDEWALK AND CURB, MEDIANS AND OTHER CITY
PROPERTY. THIS PERMIT SHALL APPROVE THE LOCATION
AND SPECIES TO BE PLANTED. FAILURE TO OBTAIN THIS
PERMIT IS A VIOLATION OF THE CITY OF FORT COLLINS
CODE SUBJECT TO CITATION (SECTION 27-31) AND MAY
ALSO RESULT IN REPLACING OR RELOCATING TREES AND A
HOLD ON CERTIFICATE OF OCCUPANCY.
1.ALL TREE REMOVAL SHOWN SHALL BE COMPLETED OUTSIDE
OF THE SONGBIRD NESTING SEASON (FEB 1 - JULY 31) OR A
NESTING SURVEY WILL BE CONDUCTED BY A PROFESSIONAL
ECOLOGIST OR WILDLIFE BIOLOGIST PRIOR TO TREE
REMOVAL TO ENSURE THAT NO ACTIVE NESTS ARE
PRESENT. IF ACTIVE NESTS ARE FOUND, THE CITY
ENVIRONMENTAL PLANNER WILL DETERMINE WHETHER
ADDITIONAL RESTRICTIONS ON TREE REMOVAL AND
CONSTRUCTION APPLY.
LANDSCAPE PLAN NOTELEGENDPLANTING SCHEDULE
NOTE: REFER TO SHEET 4 FOR FULL PLANTING SCHEDULE.
`
NORTHERNENGINEERING.COM | 970.221.4158 SWMP: SNOW RIDGE APARTMENTS
FORT COLLINS | GREELEY APPENDIX
APPENDIX D
PERMITS / APPLICATIONS
`
NORTHERNENGINEERING.COM | 970.221.4158 SWMP: SNOW RIDGE APARTMENTS
FORT COLLINS | GREELEY APPENDIX
APPENDIX E
INSPECTION LOGS
`
NORTHERNENGINEERING.COM | 970.221.4158 SWMP: SNOW RIDGE APARTMENTS
FORT COLLINS | GREELEY APPENDIX
APPENDIX F
CONTRACTOR INSERTS
`
NORTHERNENGINEERING.COM | 970.221.4158 SWMP: SNOW RIDGE APARTMENTS
FORT COLLINS | GREELEY APPENDIX
APPENDIX G
CONTRACTOR INSERTS