HomeMy WebLinkAboutLAKEVIEW SUBDIVISION - FDP - FDP130047 - REPORTS - STORMWATER MANAGEMENT PLANSTORMWATER MANAGEMENT PLAN (SWMP) /
EROSION CONTROL REPORT
LAKEVIEW SUBDIVISION
Fort Collins, Colorado
January 8, 2014
Prepared for:
Century Communities
8390 E. Crescent Parkway, Suite 650
Greenwood Village, Colorado 80111
Prepared by:
200 South College Avenue, Suite 10
Fort Collins, Colorado 80524
Phone: 970.221.4158 Fax: 970.221.4159
www.northernengineering.com
Project Number: 665-002
This Report is consciously provided as a PDF.
Please consider the environment before printing this document in its entirety.
When a hard copy is absolutely necessary, we recommend double-sided printing.
ADDRESS:
200 S. College Ave. Suite 10
Fort Collins, CO 80524
PHONE: 970.221.4158
FAX: 970.221.4159
WEBSITE:
www.northernengineering.com
January 8, 2014
City of Fort Collins
Stormwater Utility
700 Wood Street
Fort Collins, CO 80521
RE: Stormwater Management Plan/Erosion Control Report
Lakeview Subdivision
Dear Staff:
Northern Engineering Services, Inc. is pleased to submit this Stormwater Management Plan and Erosion
Control Report for Carriage House Apartments. This report outlines Best Management Practices (BMPs) to be
implemented with the proposed construction in order to minimize potential pollutants in stormwater
discharges.
We have prepared this report to accompany the Colorado Department of Public Health and Environment
(CDPHE) General Permit for Stormwater Discharge Associated with Construction Activities (i.e., Stormwater
Discharge Permit or SDP). The General Permit No. for this SDP is ___________________ (COR-XXXXXXXXXX)
and the Certification No. for this SDP is ______________ (CORXXXXX). The Permit Certification is effective
beginning ___________________ (Month Day, Year), and initial certification expires _______________ (Month
Day, Year). A copy of the issuance cover letter can be found in Appendix D of this document.
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 takes place. As such, this version was
prepared to facilitate initial plan approvals and permitting, 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 make changes to what is contained herein so that the Stormwater Management
Plan (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.
Ryan O. Banning, P.E.
Project Engineer
Lakeview Subdivision
Stormwater Management Plan/Erosion Control Report
TABLE OF CONTENTS
Vicinity Map
1.0 General Requirements ............................................................................................... 1
1.1 Objectives .................................................................................................................. 1
1.2 SWMP Availability ...................................................................................................... 1
1.3 Definitions.................................................................................................................. 1
1.4 Additional Permitting ................................................................................................... 1
2.0 Narrative Site Description .......................................................................................... 2
2.1 Existing Site Description .............................................................................................. 2
2.2 Wind and Rainfall Erodibility | Sediment Migration Patterns ............................................ 2
2.3 Nature of Construction Activity ..................................................................................... 2
2.4 Sequence of Major Activities ......................................................................................... 2
2.5 Site Disturbance ......................................................................................................... 2
2.6 Existing Data .............................................................................................................. 3
2.7 Existing Vegetation ...................................................................................................... 3
2.8 Potential Pollution Sources ........................................................................................... 3
2.9 Non-Stormwater Discharges ......................................................................................... 4
2.10 Receiving Waters ........................................................................................................ 4
3.0 Stormwater Management Controls .............................................................................. 5
3.1 SWMP Administrator ................................................................................................... 5
3.2 Best Management Practices (BMPs) for Stormwater Pollution Prevention .......................... 5
3.3 Structural Practices for Erosion and Sediment Control ..................................................... 5
3.4 Non-Structural Practices for Erosion and Sediment Control .............................................. 8
3.5 Phased BMP Installation ............................................................................................ 10
3.6 Material Handling and Spill Prevention ........................................................................ 10
3.7 Vehicle Tracking Control ............................................................................................ 11
3.8 Waste Management and Disposal ............................................................................... 11
3.9 Groundwater and Stormwater Dewatering .................................................................... 11
4.0 Final Stabilization and Long-Term Stormwater Management ........................................ 13
4.1 Final Stabilization ..................................................................................................... 13
4.2 Long-Term Stormwater Management ........................................................................... 13
5.0 Inspection, Maintenance and Record Keeping ............................................................ 14
5.1 BMP Inspection ........................................................................................................ 14
5.2 BMP Maintenance .................................................................................................... 14
5.3 Record Keeping ........................................................................................................ 14
6.0 Additional SWMP and BMP Resources ...................................................................... 16
References 17
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Stormwater Management Plan/Erosion Control Report
APPENDICES:
APPENDIX A – Site Maps
APPENDIX B – Erosion Control Details
APPENDIX C – Landscape Plan
APPENDIX D – Copies of Permits/Applications
APPENDIX E – Stormwater Management Plan Inspection Log
APPENDIX F – Contractor Inserts (as needed)
APPENDIX G – Erosion Control Cost Estimate
Lakeview Subdivision
Stormwater Management Plan/Erosion Control Report 1
1.0 General Requirements
1.1 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
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 the Project Site. This plan has been prepared according to regulations of the Colorado
Department of Public Health and Environment (CDPHE), Water Quality Control Division.
1.2 SWMP Availability
This report is intended to remain at the construction site to allow for maintenance and inspection
updates and for review during inspection.
1.3 Definitions
Best Management Practices (BMPs) – BMPs encompass a wide range of erosion and sediment
control practices, both structural and non-structural in nature, which are intended to reduce or
eliminate potential water quality impacts from construction site stormwater runoff.
Erosion Control BMPs – These practices are intended to prevent the erosion of soil. A few common
examples include: minimizing the amount of disturbed area through phasing, temporary
stabilization and preserving existing vegetation.
Sedimentation Control BMPs – These practices are designed to reduce sediment load from runoff.
Examples of a few include: straw wattles, silt fence and inlet protection.
Non-structural BMPs – These BMPs prevent or limit the entry of pollutants into stormwater at their
source through operational or managerial techniques. Some examples include: the preservation of
natural vegetation, construction phasing, preventive maintenance, construction traffic control and
spill response procedures.
Structural BMPs – Structural BMPs are designed to control sediment migration within the project
site as well as off-site during construction. This type of BMP includes physical barriers such as
diversion structures and inlet protection. Most sedimentation Control BMPs fall within this category.
1.4 Additional Permitting
As mentioned above, this Stormwater Management Plan is associated with the Colorado
Department of Public Health and Environment (CDPHE) Stormwater Permit that is issued by the
Water Quality Control Division of the CDPHE. Additional environmental permitting not described in
this report will likely be required as a part of this project. An example is the Construction
Dewatering Permit for groundwater, which will be discussed later. 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.
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Stormwater Management Plan/Erosion Control Report 2
2.0 Narrative Site Description
2.1 Existing Site Description
The project site is located in the Northwest quarter of Section 30, Township 7 North, Range 68
West of the 6th Principal Meridian, City of Fort Collins, County of Larimer, State of Colorado. The
Lakeview Subdivision is bordered to the north by Drake Road; to the south by the Eastborough
Subdivision and a City of Fort Collins owned detention pond; to the east by Eldorado Springs
Subdivision; and to the west by the First Christian Church and Lemay Avenue.
2.2 Wind and Rainfall Erodibility | Sediment Migration Patterns
The site is located within a Moderate Risk Wind Erodibility Zone per the City of Fort Collins Wind
Erodibility Map. According to the Natural Resources Conservation Service website
(www.websoilsurvey.nrcs.usda.gov), the average applicable soil erodibility factor (K) is 0.28. This
value is indicative of soils moderately susceptible to rainfall erosion.
The long-term likelihood of erosion and sediment problems occurring on-site is minimal because the
site will be paved, vegetated with lot development or covered by structures that will permanently
stabilize the areas disturbed by proposed construction activity. During the interim period, in which
the disturbed areas are open, the BMPs described herein were selected to prevent erosion and limit
sediment migration.
2.3 Nature of Construction Activity
The project will completely raze all of the existing structures currently occupying the property. The
proposed development will consist of single family residential homes, associated streets and
landscaped open areas.
2.4 Sequence of Major Activities
To complete the project, many basic construction activities will take place. The project will first be
stripped of topsoil and existing improvements will be removed. Secondly the site will be overlot
graded and detention facilities will be installed. Installation of utilities will follow and includes:
domestic water, sanitary sewer and storm sewer. Finally, streets will be paved, landscaping will be
installed and open areas will be reseeded in anticipation of lot development. Installation of
permanent water quality measures will follow initial stabilization of the site to prevent overwhelming
loads during construction.
2.5 Site Disturbance
The total area of the project site is 11.2 acres. The total area of the project to undergo disturbance
is 10.8 acres. Site disturbance is expected to be uniform.
At this time, a firm construction schedule of land disturbing activities is not available as a contractor
has not been chosen. However, several general milestone dates follow. These will be updated as
information becomes available:
Demo existing: TBD
Begin site work: TBD
Move-in: TBD
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Stormwater Management Plan/Erosion Control Report 3
2.6 Existing Data
In order to complete the associated construction plans, a series of topographical surveys of the site
were completed. The survey consisted of field measurements made by Northern Engineering
Services, Inc. in July, 2013.
More site-specific exploration was performed by CTL Thompson Inc. Detailed results from the site
investigation are contained in the Preliminary Geotechnical Investigation-Lakeview Single-Family
Residential 2700 South Lemay Avenue Fort Collins, Colorado (Project No. FC05622.001-115) dated
June 24, 2013.
2.7 Existing Vegetation
The existing ground cover consists mostly of manicured grasses and ball fields as this is a re-
development project. The existing on-site runoff generally drains south across flat grades (e.g.,
<2.00%) into the existing detention facility for the Christ Center Community Church. Existing
average vegetative density is approximately 70%.
The historic cover is undetermined. Final stabilization will occur with an individual plant density of
at least 70 percent ground cover which is the natural density aside from previous development or
equivalent permanent, physical erosion reduction methods will be achieved. Roughly 40 percent of
the total disturbed area will be permanently stabilized with asphalt, concrete or roof area. The
remaining area will be stabilized with landscaping such as wetland seed, sod and planting beds. It
is highly recommended that pre-construction photos be taken to clearly document vegetative
conditions prior any disturbance activities.
2.8 Potential Pollution Sources
As is typical with most construction sites, there are a number of potential pollution sources which
could affect water quality. It is not possible for this report to identify all materials that will be 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. The following are some common
examples of potential pollution sources:
All disturbed and stored soils
Vehicle tracking of sediments
Management of contaminated soils
Loading and unloading operations
Outdoor storage activities (e.g., building materials, fertilizers, chemicals, etc.)
Vehicle and equipment maintenance and fueling
Significant dust or particulate generating processes
Routine maintenance activities involving fertilizers, pesticides, detergents, fuels, solvents, oils, etc.
On-site waste disposal practices (e.g., waste piles, liquid wastes, dumpsters, etc.)
Concrete truck/equipment washing, including the concrete truck chute and associated fixtures and
equipment
Dedicated asphalt and concrete batch plants
Non-industrial waste sources such as worker trash and portable toilets
Other areas or procedures where potential spills can occur
Management of Contaminated Soils: We are not aware of on-site contaminated soils. However, the
contractor should conduct a thorough, pre-construction environmental site assessment. If
contaminated soils are discovered, the contractor will identify appropriate practices and procedures
for the specific contaminants discovered on-site.
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Stormwater Management Plan/Erosion Control Report 4
Loading and Unloading Operations: During site demolition, material loading and unloading will
occur on-site. As site development and building construction progresses, space constraints will limit
the number of on-site locations for loading and unloading activities. The contractor will be
responsible for the proper handling and management of pollution sources during loading and
unloading operations.
Dedicated Asphalt and Concrete Batch Plants: neither dedicated asphalt nor concrete batch plant
will be constructed on-site.
2.9 Non-Stormwater Discharges
The Stormwater Construction Permit only covers discharges composed entirely of stormwater.
Emergency firefighting water is the only authorized exception.
Concrete Washout water can NOT be discharged to surface waters or to storm sewer systems
without separate permit coverage. The discharge of Concrete Washout water to the ground, under
specific conditions, may be allowed by the Stormwater Construction Permit when appropriate BMPs
are implemented.
Construction Dewatering water can NOT be discharged to surface waters or to storm sewer systems
without separate permit coverage. The discharge of Construction Dewatering water to the ground,
under specific conditions, may be allowed by the Stormwater Construction Permit when appropriate
BMPs are implemented.
The discharge of pumped stormwater, ONLY, from excavations, ponds, depressions, etc., to surface
waters, or to a municipal separate storm-sewer system (MS4) is allowed by the Stormwater
Construction Permit, as long as the dewatering activity and associated BMPs are identified in the
SWMP (including location of the activity), and BMPs are implemented in accordance with the
SWMP.
2.10 Receiving Waters
Stormwater runoff from the project area will generally drain to a Extended Detention Basin designed
for the project along the south property line. The outfall from the EDB is the existing City of Fort
Collins Detention Pond just south of the project. The storm system connected to the detention pond
is routed to the south and east along Oxborough Lane and Silverwood Drive public storm sewers to
Nelson Reservoir roughly 1,000 feet east from the project. Nelson Reservoir is regional water
quality and detention/retention for the surrounding subdivision therefore concentrated flow from the
project never reaches the Poudre however the ultimate receiving waters for Nelson reservoir
outflows if conditions arise where outflows would occur would hypothetically be the Poudre River
through public storm systems and drainage ways. The Poudre River is roughly 2 miles west from
the Nelson Reservoir. The proposed drainage patterns are generally consistent with existing drainage
patterns.
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Stormwater Management Plan/Erosion Control Report 5
3.0 Stormwater Management Controls
3.1 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 authority to adequately manage and direct day-to-day stormwater quality
management activities at the site.
The SWMP Administrator for this site is:
Name:
Company:
Phone:
E-mail:
3.2 Best Management Practices (BMPs) for Stormwater Pollution Prevention
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.
Beginning with mobilization, and throughout the entire construction of the buildings, erosion control
devices shall be installed and maintained to minimize pollutant migration. The BMPs may be
installed or implemented 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.
The Drainage & Erosion Control Exhibit (Refer to sheet DR1 in Appendix A) illustrates the assumed
location for each of the BMPs. Details for recommended BMPs are included in Appendix A. These
details should be used for additional information on installation and maintenance of BMPs
described herein. 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.
3.3 Structural Practices for Erosion and Sediment Control
Structural BMPs are physical devices that prevent or minimize water quality impacts associated
with construction site stormwater runoff. These devices can be temporary or permanent, and the
installation of individual components will vary depending on the stage of construction.
A table depicting the construction sequence and BMP application/removal will be placed on the
“Dynamic Site Plan” (with future submittal) to help document the implementation of these BMPs.
Refer to the Drainage & Erosion Control Exhibit in the Appendix A for the assumed location of all
BMPs. Construction Details for Temporary BMPs are located in Appendix A for reference.
Again, the final determination of which BMPs 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.
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Stormwater Management Plan/Erosion Control Report 6
Silt Fencing (Phases I - IV)
Perimeter silt fencing shall be provided to prevent migration of sediment off-site into the
public right-of-way or onto adjacent properties whenever grading promotes sheet runoff from
the site. All perimeter silt fencing applicable during preconstruction or anticipated during
the sequence of grading shall be installed prior to any land disturbing activity (i.e.,
stockpiling, stripping, grading, excavation, earthwork activities, etc.).
The silt fence inspections should identify tears or holes in the material as well as check for
slumping fence, poorly installed jointing or undercut areas that allow flows to bypass the
fencing. The damaged sections of fencing should be replaced and properly joined within
previously installed fence. Sediment accumulations equal to or greater than 6 inches behind
the silt fence should be removed to maintain BMP effectiveness. All spoils from installation
shall be placed uphill of the fence.
See the static erosion control plan for all suggested locations of silt fencing. Silt fencing is
suggested on the east side of the site due to proposed detail grading sloping offsite. Silt
fencing may be used as stockpile protection surrounding the toe of any stockpile. Silt Fence
fence should not be used for interception of runoff from large disturbed areas. Diversions
should be installed where heavy runoff is anticipated.
Sediment Control Log – aka “Straw Wattles” (Phases I - IV)
A Sediment Control Log (SW) is a linear roll made of natural materials, such as excelsior,
coconut fiber or other fibrous material trenched into the ground and anchored with wooden
stakes. Logs shall be entrenched slightly to minimize runoff bypass by undercutting.
Sediment Control Logs can be used as perimeter control for stockpiles, as check dams in
small drainage ways (e.g., swales) or on disturbed slopes to shorten flow lengths.
Sediment Control Logs should be inspected for excess sediment accumulation. The sediment
should be removed prior to reaching half the height of the log. Logs shall be replaced when
sediment loading is obvious within the fibers integral to the log.
At a minimum, Sediment Control Logs should be used around soil stockpiles and for
sediment removal at the upstream end of the proposed metal sidewalk culverts. Wattles
should be used as checks within swales to minimize erosion. For swale use 2% slope shall
be maintained from bottom of upstream log to top of downstream log.
Vehicle Tracking Control Pad (Phases I - II)
A Vehicle Tracking Control (VTC) pad shall be provided to minimize tracking of mud and
sediment onto paved surfaces and neighboring roadways. The vehicle tracking control pad
shall be installed prior to any land disturbing activity (e.g., stockpiling, stripping, grading,
etc.). The vehicle tracking control pad should 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.
Vehicle tracking pads should be inspected for degradation. The aggregate material should
remain rough (unpacked) and be replaced if the area becomes clogged with water and/or
excess sediment.
The current plan shows a single vehicle tracking control pad at the north access to the site.
Curb Inlet Protection (Phases I - IV)
Curb inlet protection shall be provided around existing curb inlets (Oxborough Lane) and
immediately after installation curb connected to any proposed inlet. The filter shall be
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Stormwater Management Plan/Erosion Control Report 7
installed at existing inlets prior to adjacent earth disturbing activities. When pavement is
constructed adjacent to the structure or if the area adjacent to the inlet is changed such that
the wattle dike type filter is no longer effective, it shall be the responsibility of the contractor
to ensure that an appropriate replacement is implemented. For example, rock sock inlet
filter may be installed.
All type-13 (grated) inlets shall be completely covered by inlet protection. Filter fabric style
inlet grate protection bags with curb inlet dike or an approved equal are suggested in such
cases.
Area Inlet Protection (Phases I - IV)
Area Inlet protection (IP) should be dike type surrounding the inlet. Silt fence is not an
appropriate material for area inlet protection. Filter fabric may be used in conjunction with
dikes to cover any grated inlet. Area inlet projection should not fully impede large
stormflows from entering inlets unless alternate flowpath are determined prior to installation.
Inlet protection should also be inspected for sediment accumulation upstream of the inlet
and replaced when sediment loading is obvious within the fibers integral to the structure.
Rock Socks (Phases I - IV)
Rock sock check dams to be used within curb and gutter at a regular interval where runoff
from disturbed area is are proposed to drain to curb and gutter. Rock sock heights should
allow for pools to develop upstream, creating minor backwaters to both reduce velocities
and to allow sediment deposition. The rock socks should be spaced so that the top of each
dam is no more than 2% slope below the toe of the next upstream rock sock.
Rock Socks may also be used in curb inlet protection where it is possible to completely
block drainage pathways to inlets. Overtopping of rock socks used for curb inlet protection
should be allowed in all cases unless alternative flow paths are determined prior to
installation.
Rock socks should be inspected regularly for gaps or holes which would allow untreated
water to pass through, under or around the structures. The accumulated sediment should be
removed, typically prior to the sediment depth reaching half the height of the check dam.
Concrete Washout Area (Phases II - III)
A concrete washout area shall be provided on the site prior to any concrete installation. The
washout can be a lined or unlined excavated pit in the ground, a commercially
manufactured prefabricated container or an aboveground holding area. The concrete
washout area 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. If not lined,
the concrete washout area should not be located in an area where shallow groundwater may
be present. The contractor shall clearly show the desired location and access to the
Concrete Washout Area on the Stormwater Management Plan - Dynamic Site Plan. The
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
shall also be provided.
The Concrete Washout Area shall be inspected regularly with particular attention being 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. Washout areas shall be cleaned out when half of
the retained capacity is consumed. Washout areas shall not be used for dumping materials
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Stormwater Management Plan/Erosion Control Report 8
and shall be removed when concrete construction is no longer anticipated.
Permanent/Established Vegetation (Phase IV)
Permanent or established vegetation and landscaping is considered a permanent form of
sediment and erosion control. Areas where the previous conditions apply will contain
sufficient permanent BMPs such as sod or landscape material (e.g., smooth river
rock/cobble and wood mulch).
3.4 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 a 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
upgradient 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 also 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.
Fencing should be inspected and repaired as needed. If damage occurs to a tree, an arborist
should be consulted. If a tree is damage beyond repair, the City Forester should be
consulted on remediation measures.
Stockpile Management (Phases I - IV)
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, which is
usually true for stockpiles that sit longer than 30 days, they should be inspected and
repaired as needed.
Mulching (Phases I - IV)
Mulching helps reduce erosion by protecting bare soil from rainfall impact, reducing sheet
flow velocities, increasing infiltration and initial abstraction 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 permanently reseeded due to seasonal
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Stormwater Management Plan/Erosion Control Report 9
constraints. Temporary seeding should be implemented with mulching using sterile/annual
cover crops, appropriate for the time of year when not within a permanent seeding window.
The most common type of mulch used is straw that is crimped into the soil to keep it
secure.
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) to four (4) tons per acre, and shall be adequately secured by crimping. 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.
Wind Erosion/Dust Control (Phases I - IV)
Wind Erosion and Dust Control BMPs help to keep soil particles from entering the air as a
result of land disturbing construction activities. Examples include the use of a water truck or
irrigation/sprinkler system to wet the top layer of disturbed soil, seeding and mulching, soil
binders or wind fences.
If a water truck or irrigation/sprinkler system is utilized, then monitoring for sufficient water
application is crucial to ensuring soil particles don’t become airborne. Equally important is
monitoring for overwatering, as too much water can lead to increased erosion and sediment
laden construction site runoff.
Good Housekeeping Practices (Phases I - IV)
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 and 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.
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.
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Stormwater Management Plan/Erosion Control Report 10
Saw Cutting Pollution Prevention (Phase II)
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 wet vacuumed during cutting and surfacing operations
- Slurry and cuttings shall not remain on permanent concrete or asphalt pavement
overnight
- Slurry and cuttings shall not drain to any natural or constructed drainage
conveyance
- Collected slurry and cuttings shall be disposed of in a manner that does not violate
groundwater or surface water standards
- Where slurry will not stay in place due to pavement grade, plastic sheet materials
may be used to trap slurry until wet vacuuming can be accomplished.
Construction Traffic Control (Phases I - IV)
Controlling traffic entering and leaving the construction site is crucial for implementation of
appropriate vehicle tracking controls. Standard orange construction fence on tee posts is
suggested for perimeter traffic controls. Barriers such as temporary type-3 barricades can be
utilized approaching paved areas to deter tracking in unprotected areas.
3.5 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, which are 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 – Grading Stage; BMPs for initial installation of perimeter controls with clear and
grub phasing to minimize ground disturbance to only when necessary for construction.
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.
3.6 Material Handling and Spill Prevention
Potential pollution sources, as discussed in earlier sections, are to be to be identified by the
contractor. Spill prevention procedures are to be determined and put in place prior to construction
by the contractor. A spill and flooding response procedure must also be determined and put in place
prior to construction by the contractor. Additionally, steps should be taken to reduce the potential
for leaks and spills coming into contact with stormwater runoff.
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
Lakeview Subdivision
Stormwater Management Plan/Erosion Control Report 11
surface water, ground water, 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
that will require cleanup, even if the spill is minor and does not need to be reported to the state,
should still be reported to the City 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 berm capable of retaining potential spills shall enclose fueling areas. Other
secondary containment devices can be used instead of the earthen berm. 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.
3.7 Vehicle Tracking Control
In addition to the vehicle tracking pads discussed previously, 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. Regular street sweeping can also be
used to minimize the transmission of sediment from the site due to vehicles leaving the site. The
use of gravel parking areas and wash racks can also be implemented to ensure minimal vehicle
tracking from the site. Minimizing or limiting the number of vehicles accessing the site by providing
designated delivery areas, or by restricting deliveries when the site is muddy is also encouraged.
3.8 Waste Management and Disposal
It will be the responsibility of the contractor to designate a concrete truck chute washout area and
to clearly identify that area. Detailed information about the design and maintenance of the Concrete
Washout can be found under the Structural Practices section of this report. At no time should
untreated wash water be allowed to discharge from the site or to enter a storm drain system or
stream. Upon completion of construction activities the concrete washout material shall be removed
and properly disposed of prior to the area being restored.
Any waste material that currently exists on the site or that is generated by construction will be
disposed of in such a manner as to not cause pollutants in stormwater discharges. If waste is to be
stored on-site, it shall be in an area located a minimum of 100 feet from all drainage courses.
Whenever waste is not stored in a non-porous container, it shall be in an area enclosed by a 12-
inch high compacted earthen berm or some other approved secondary containment device. The
area shall be covered with a non-porous lining to prevent soil contamination. Whenever
precipitation is predicted, the waste shall be covered with a non-porous cover and anchored on all
sides to prevent its removal by wind. On-site waste disposal practices, such as dumpsters, should
be covered or otherwise contained as to prevent dispersion of waste materials by wind. It shall also
be the responsibility of the contractor to maintain a clean jobsite and to prevent the dispersion of
waste material and potential pollutants into adjacent properties or waterways.
The location of, and protective measures for, temporary restroom facilities shall be the responsibility
of the SWMP Administrator.
3.9 Groundwater and Stormwater Dewatering
The BMPs selected for construction dewatering vary depending on the site-specific features, such as
soils, topography, discharge quantities and discharge location. Typically, dewatering involves
pumping water from an inundated area to a BMP, prior to the water being released downstream
Lakeview Subdivision
Stormwater Management Plan/Erosion Control Report 12
into a receiving waterway, sediment basin, or well-vegetated area. Acceptable BMPs included
discharging water into a sediment trap or basin, using a dewatering filter bag or using a series of
sediment logs. A settlement tank or an active treatment system can also be utilized as long as it is
not a chemically induced treatment system. Another commonly used method to handle the pumped
water is the “sprinkler method,” which involves applying the water to vegetated areas through a
perforated discharge hose. Dispersal from a water truck for dust control can also be used to disperse
the pumped water.
Lakeview Subdivision
Stormwater Management Plan/Erosion Control Report 13
4.0 Final Stabilization and Long-Term Stormwater Management
4.1 Final Stabilization
All disturbed areas will be seeded, crimped and mulched. 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 (refer also to Land Use Code 3.8.21). 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.” Qualifying vegetative cover is perennial and does not include annual cover crops or
volunteer species.
Table 1 – Native Grass Seed Mix
Preferred
Varieties
Seeded Rate
(lbs. per acre,
drilled)
PLS
Seeded/acre
Leymus Cinereus Great Basin Wilrye Mangar 3 285,000
Nassella Viridula Green Needlegrass Lodorm 2 362,000
Chnatherum Hymenoides Indian Ricegrass Paloma, Nezpar 1 188,000
Elymus Trachycaulus Slender Wheatgrass Primar, Revenue 2 320,000
Elymus Lanceolatus Thickspike Wheatgrass Critana 3 580,500
Pascopyrum Smithii Western Wheatgrass Arriba, Barton 4 504,000
Totals 15 2,239,500
Species
4.2 Long-Term Stormwater Management
The primary method of long-term stormwater management will be an ultra urban developed site
mostly comprised of rooftop area and concrete. Small pockets of fully landscaped areas will also
exist.
Lakeview Subdivision
Stormwater Management Plan/Erosion Control Report 14
5.0 Inspection, Maintenance and Record Keeping
5.1 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 in order 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 to
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 that are exposed to precipitation shall be
inspected for evidence of, or the potential for, pollutants entering the drainage system. Erosion and
sediment control measures shall be identified in the SWMP and shall be observed to ensure that
they are operating correctly. Particular attention shall be paid to areas that have 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.
5.2 BMP Maintenance
Any BMPs not operating in accordance with the SWMP must be addressed as soon as possible 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 off-site 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 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
in order 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 with Appendix B.
5.3 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 BMP’s that need to be maintained
Location(s) of BMP’s that failed to operate as designed or proved inadequate
Locations(s) where additional BMP’s are needed that were not in place at the time of inspection
Deviations from the minimum inspection schedule
Lakeview Subdivision
Stormwater Management Plan/Erosion Control Report 15
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 in a future submittal within Appendix E of this SWMP will be an Example Inspection Log
to aid in the record keeping of BMP inspections and maintenance. Photographs, field notebooks,
drawings and maps should be included when appropriate.
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 that are 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, ground water 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 hand write the location and dates of BMPs installations to accurately reflect the
current site conditions. Also on the “Dynamic Site Plan” should be a “Table of Construction
Sequence and BMP Application/Removal” that the SWMP Administrator can use to document when
BMPs were installed or removed in conjunction with construction activities. These items will be
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 takes place. 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.
Lakeview Subdivision
Stormwater Management Plan/Erosion Control Report 16
6.0 Additional SWMP and BMP Resources
Urban Drainage and Flood Control District
Urban Storm Drainage Criteria Manual - Volume 3 “Best Management Practices”
Colorado Department of Transportation
Erosion Control and Stormwater Quality Guide
BMP Field Academy
EPA Menu of BMP’s
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
Lakeview Subdivision
Stormwater Management Plan/Erosion Control Report 17
References
1. Final Drainage Report for The Carriage House Apartments, Northern Engineering Services,
May 29, 2013 (NES Project No. 620-002)
2. Geotechnical Engineering Study and Pavement Thickness Design Proposed Student
Apartment Development 1305 and 1319 South Shields Avenue Fort Collins, Colorado,
December 13, 2012, Kumar and Associates, Inc. (Project No. 12-1-517).
3. Soil Resource Report for Larimer County Area, Colorado, Natural Resources Conservation
Service, United States Department of Agriculture.
4. Urban Storm Drainage Criteria Manual, Volumes 1-3, Urban Drainage and Flood Control
District, Water Resources Publications, LLC., Denver, Colorado, Updated November 2010.
APPENDIX A
SITE MAPS
ELEC
WV
H Y
D
H Y
D
CABLE VAULT
CONTROL IRR
T
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LOT 105
LOT 106
LOT 108
LOT 109
LOT 110
LOT 111
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TRACT A
EASTBOROUGH
OWNER: CITY OF
FORT COLLINS
LOT 133
LOT 131 LOT 132
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WV
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CABLE VAULT
CONTROL IRR
T
C C
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C C
S
S
T
T
T
T
F
E
S
C
T
PEONY WAY
LOD LOD
LOD
LOD LOD
LOD
LOD
LOD
LOD
LOD LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD LOD
LOD
LOD LOD
LOD
LOD LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD LOD
LOD
LOD LOD
LOD
2:1
MAX.
FLOW
TRANSITION EXISTING
POND INTO SEDIMENT TRAP
2:1
MAX.
2:1
MAX.
2:1
MAX.
4' MIN.
8' MIN.
1' MIN.
1' MIN.
16'
8'
B B
2:1
MAX.
2:1
MAX.
A A
SECTION A-A
PLAN VIEW
SECTION B-B
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.
Call before you dig.
R
City Engineer Date
Date
Date
Date
Date
Stormwater Utility
Parks & Recreation
Traffic Engineer Date
APPROVED:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
Water & Wastewater Utility
City of Fort Collins, Colorado
UTILITY PLAN APPROVAL
Environmental Planner
N/A
No. Revisions:
By: Date:
REVIEWED BY:
R. Banning
DESIGNED BY:
DRAWN BY:
SCALE:
SPACE POSTS
PER MANUFACTURES
RECOMMENDATIONS
City Engineer Date
Date
Date
Date
Date
Stormwater Utility
Parks & Recreation
Traffic Engineer Date
APPROVED:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
Water & Wastewater Utility
City of Fort Collins, Colorado
UTILITY PLAN APPROVAL
Environmental Planner
N/A
No. Revisions:
By: Date:
REVIEWED BY:
R. Banning
DESIGNED BY:
DRAWN BY:
SCALE:
DATE:
JANUARY 2014
PROJECT:
665-002
Sheet
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EC3
EROSION CONTROL DETAILS
A. Boese
A. Boese
1"=50'
APPENDIX B
EROSION CONTROL DETAILS
Chapter 7 Construction BMPs
November 2010 Urban Drainage and Flood Control District 7-13
Urban Storm Drainage Criteria Manual Volume 3
Final Stabilization
▪ Revegetate Site
▪ Activate Post Construction BMPs
(e.g., convert sediment basin to extended
detention basin)
▪ Remove Temporary BMPs
▪ Closeout State and Local Stormwater Permits
Construction Phase
Representative Phases:
▪ Clearing and Grubbing
▪ Rough Grading
▪ Road Construction
▪ Utility and Infrastructure Installation
▪ Vertical Construction (Buildings)
▪ Final Grading
Management Practices:
▪ Phase Construction Activities to Minimize
Disturbed Area at a Given Time
▪ Sequence Contruction within Phases to Avoid
Idle Disturbed Areas
▪ Install, Inspect and Proactively Maintain BMPs
Appropriate for Each Phase of Construction
▪ Maintain and Update SWMP as Construction
Progresses
Pre-Construction
▪ Develop Site Plan
▪ Obtain Site Survey, Hydrology and Soils
Information
▪ Prepare SWMP
▪ Obtain Stormwater Construction Permits
(State and Local)
▪ Obtain Other Relevant Permits
(e.g., 404 , Floodplain, Dewatering)
Figure 7-2. Construction Stormwater Management
Construction BMPs Construction BMPs
7-14 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Functions
Erosion
Control
Sediment
Control
Site/Material
Management
Surface Roughening Yes No No
Temporary/Permanent Seeding Yes No No
Soil Binders Yes No Moderate
Mulching Yes Moderate No
Compost Blankets and Filter Berms Yes Moderate No
Rolled Erosion Control Products Yes No No
Temporary Slope Drains Yes No No
Temporary Outlet Protection Yes Moderate No
Rough Cut Street Control Yes Moderate No
Earth Dikes / Drainage Swales Yes Moderate No
Terracing Yes Moderate No
Check Dams Yes Moderate No
Streambank Stabilization Yes No No
Wind Erosion / Dust Control Yes No Moderate
Silt Fence No Yes No
Sediment Control Log Moderate Yes No
Straw Bale Barrier No Moderate No
Brush Barrier Moderate Moderate No
Rock Sock (perimeter control) No Yes No
Inlet Protection (various forms) No Yes No
Sediment Basins No Yes No
Sediment Traps No Yes No
Vegetative Buffers Moderate Yes Yes
Chemical Treatment Moderate Yes No
Concrete Washout Area No No Yes
Stockpile Management Yes Yes Yes
Good Houskeeping (multiple practices) No No Yes
Construction Phasing Moderate Moderate Yes
Protection of Existing Vegetation Yes Moderate Yes
Construction Fence No No Yes
Vehicle Tracking Control Moderate Yes Yes
Stabilized Construction Roadway Yes Moderate Yes
Stabilized Staging Area Yes Moderate Yes
Street Sweeping / Vacuuming No Yes Yes
Temporary Diversion Channel Yes No No
Dewatering Operations Moderate Yes Yes
Temporary Stream Crossing Yes Yes No
Temporary Batch Plants No No Yes
Paving and Grinding Operations No No Yes
Site Management and Other Specific Practices
Sediment Control BMPs
Erosion Control BMPs
Materials Management
Table 7-2. Overview of Construction BMPs
Surface Roughening (SR) EC-1
November 2010 Urban Drainage and Flood Control District SR-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph SR-1. Surface roughening via imprinting for temporary
stabilization.
Description
Surface roughening is an erosion control
practice that involves tracking,
scarifying, imprinting, or tilling a
disturbed area to provide temporary
stabilization of disturbed areas. Surface
roughening creates variations in the soil
surface that help to minimize wind and
water erosion. Depending on the
technique used, surface roughening may
also help establish conditions favorable
to establishment of vegetation.
Appropriate Uses
Surface roughening can be used to
provide temporary stabilization of
disturbed areas, such as when
revegetation cannot be immediately established due to seasonal planting limitations. Surface roughening
is not a stand-alone BMP, and should be used in conjunction with other erosion and sediment controls.
Surface roughening is often implemented in conjunction with grading and is typically performed using
heavy construction equipment to track the surface. Be aware that tracking with heavy equipment will also
compact soils, which is not desirable in areas that will be revegetated. Scarifying, tilling, or ripping are
better surface roughening techniques in locations where revegetation is planned. Roughening is not
effective in very sandy soils and cannot be effectively performed in rocky soil.
Design and Installation
Typical design details for surfacing roughening on steep and mild slopes are provided in Details SR-1 and
SR-2, respectively.
Surface roughening should be performed either after final grading or to temporarily stabilize an area
during active construction that may be inactive for a short time period. Surface roughening should create
depressions 2 to 6 inches deep and approximately 6 inches apart. The surface of exposed soil can be
roughened by a number of techniques and equipment. Horizontal grooves (running parallel to the
contours of the land) can be made using tracks from equipment treads, stair-step grading, ripping, or
tilling.
Fill slopes can be constructed with a roughened surface. Cut slopes that have been smooth graded can be
roughened as a subsequent operation. Roughening should follow along the contours of the slope. The
tracks left by truck mounted equipment working perpendicular
to the contour can leave acceptable horizontal depressions;
however, the equipment will also compact the soil.
Surface Roughening
Functions
Erosion Control Yes
Sediment Control No
Site/Material Management No
EC-1 Surface Roughening (SR)
SR-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Maintenance and Removal
Care should be taken not to drive vehicles or equipment over areas that have been surface roughened.
Tire tracks will smooth the roughened surface and may cause runoff to collect into rills and gullies.
Because surface roughening is only a temporary control, additional treatments may be necessary to
maintain the soil surface in a roughened condition.
Areas should be inspected for signs of erosion. Surface roughening is a temporary measure, and will not
provide long-term erosion control.
Surface Roughening (SR) EC-1
November 2010 Urban Drainage and Flood Control District SR-3
Urban Storm Drainage Criteria Manual Volume 3
EC-1 Surface Roughening (SR)
SR-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Temporary and Permanent Seeding (TS/PS) EC-2
November 2010 Urban Drainage and Flood Control District TS/PS-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph TS/PS -1. Equipment used to drill seed. Photo courtesy of
Douglas County.
Description
Temporary seeding can be used to
stabilize disturbed areas that will be
inactive for an extended period.
Permanent seeding should be used to
stabilize areas at final grade that will not
be otherwise stabilized. Effective seeding
includes preparation of a seedbed,
selection of an appropriate seed mixture,
proper planting techniques, and protection
of the seeded area with mulch, geotextiles,
or other appropriate measures.
Appropriate Uses
When the soil surface is disturbed and
will remain inactive for an extended
period (typically 30 days or longer),
proactive stabilization measures should be implemented. If the inactive period is short-lived (on the order
of two weeks), techniques such as surface roughening may be appropriate. For longer periods of
inactivity, temporary seeding and mulching can provide effective erosion control. Permanent seeding
should be used on finished areas that have not been otherwise stabilized.
Typically, local governments have their own seed mixes and timelines for seeding. Check jurisdictional
requirements for seeding and temporary stabilization.
Design and Installation
Effective seeding requires proper seedbed preparation, selection of an appropriate seed mixture, use of
appropriate seeding equipment to ensure proper coverage and density, and protection with mulch or fabric
until plants are established.
The USDCM Volume 2 Revegetation Chapter contains detailed seed mix, soil preparations, and seeding
and mulching recommendations that may be referenced to supplement this Fact Sheet.
Drill seeding is the preferred seeding method. Hydroseeding is not recommended except in areas where
steep slopes prevent use of drill seeding equipment, and even in these instances it is preferable to hand
seed and mulch. Some jurisdictions do not allow hydroseeding or hydromulching.
Seedbed Preparation
Prior to seeding, ensure that areas to be revegetated have
soil conditions capable of supporting vegetation. Overlot
grading can result in loss of topsoil, resulting in poor quality
subsoils at the ground surface that have low nutrient value,
little organic matter content, few soil microorganisms,
rooting restrictions, and conditions less conducive to
infiltration of precipitation. As a result, it is typically
necessary to provide stockpiled topsoil, compost, or other
Temporary and Permanent Seeding
Functions
Erosion Control Yes
Sediment Control No
Site/Material Management No
EC-2 Temporary and Permanent Seeding (TS/PS)
TS/PS-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
soil amendments and rototill them into the soil to a depth of 6 inches or more.
Topsoil should be salvaged during grading operations for use and spread on areas to be revegetated later.
Topsoil should be viewed as an important resource to be utilized for vegetation establishment, due to its
water-holding capacity, structure, texture, organic matter content, biological activity, and nutrient content.
The rooting depth of most native grasses in the semi-arid Denver metropolitan area is 6 to 18 inches. At a
minimum, the upper 6 inches of topsoil should be stripped, stockpiled, and ultimately respread across
areas that will be revegetated.
Where topsoil is not available, subsoils should be amended to provide an appropriate plant-growth
medium. Organic matter, such as well digested compost, can be added to improve soil characteristics
conducive to plant growth. Other treatments can be used to adjust soil pH conditions when needed. Soil
testing, which is typically inexpensive, should be completed to determine and optimize the types and
amounts of amendments that are required.
If the disturbed ground surface is compacted, rip or rototill the surface prior to placing topsoil. If adding
compost to the existing soil surface, rototilling is necessary. Surface roughening will assist in placement
of a stable topsoil layer on steeper slopes, and allow infiltration and root penetration to greater depth.
Prior to seeding, the soil surface should be rough and the seedbed should be firm, but neither too loose
nor compacted. The upper layer of soil should be in a condition suitable for seeding at the proper depth
and conducive to plant growth. Seed-to-soil contact is the key to good germination.
Seed Mix for Temporary Vegetation
To provide temporary vegetative cover on disturbed areas which will not be paved, built upon, or fully
landscaped or worked for an extended period (typically 30 days or more), plant an annual grass
appropriate for the time of planting and mulch the planted areas. Annual grasses suitable for the Denver
metropolitan area are listed in Table TS/PS-1. These are to be considered only as general
recommendations when specific design guidance for a particular site is not available. Local governments
typically specify seed mixes appropriate for their jurisdiction.
Seed Mix for Permanent Revegetation
To provide vegetative cover on disturbed areas that have reached final grade, a perennial grass mix should
be established. Permanent seeding should be performed promptly (typically within 14 days) after
reaching final grade. Each site will have different characteristics and a landscape professional or the local
jurisdiction should be contacted to determine the most suitable seed mix for a specific site. In lieu of a
specific recommendation, one of the perennial grass mixes appropriate for site conditions and growth
season listed in Table TS/PS-2 can be used. The pure live seed (PLS) rates of application recommended
in these tables are considered to be absolute minimum rates for seed applied using proper drill-seeding
equipment.
If desired for wildlife habitat or landscape diversity, shrubs such as rubber rabbitbrush (Chrysothamnus
nauseosus), fourwing saltbush (Atriplex canescens) and skunkbrush sumac (Rhus trilobata) could be
added to the upland seedmixes at 0.25, 0.5 and 1 pound PLS/acre, respectively. In riparian zones,
planting root stock of such species as American plum (Prunus americana), woods rose (Rosa woodsii),
plains cottonwood (Populus sargentii), and willow (Populus spp.) may be considered. On non-topsoiled
upland sites, a legume such as Ladak alfalfa at 1 pound PLS/acre can be included as a source of nitrogen
for perennial grasses.
Temporary and Permanent Seeding (TS/PS) EC-2
November 2010 Urban Drainage and Flood Control District TS/PS-3
Urban Storm Drainage Criteria Manual Volume 3
Seeding dates for the highest success probability of perennial species along the Front Range are generally
in the spring from April through early May and in the fall after the first of September until the ground
freezes. If the area is irrigated, seeding may occur in summer months, as well. See Table TS/PS-3 for
appropriate seeding dates.
Table TS/PS-1. Minimum Drill Seeding Rates for Various Temporary Annual Grasses
Speciesa
(Common name)
Growth
Seasonb
Pounds of
Pure Live Seed
(PLS)/acrec
Planting
Depth
(inches)
1. Oats Cool 35 - 50 1 - 2
2. Spring wheat Cool 25 - 35 1 - 2
3. Spring barley Cool 25 - 35 1 - 2
4. Annual ryegrass Cool 10 - 15 ½
5. Millet Warm 3 - 15 ½ - ¾
6. Sudangrass Warm 5–10 ½ - ¾
7. Sorghum Warm 5–10 ½ - ¾
8. Winter wheat Cool 20–35 1 - 2
9. Winter barley Cool 20–35 1 - 2
10. Winter rye Cool 20–35 1 - 2
11. Triticale Cool 25–40 1 - 2
a Successful seeding of annual grass resulting in adequate plant growth will
usually produce enough dead-plant residue to provide protection from
wind and water erosion for an additional year. This assumes that the cover
is not disturbed or mowed closer than 8 inches.
Hydraulic seeding may be substituted for drilling only where slopes are
steeper than 3:1 or where access limitations exist. When hydraulic
seeding is used, hydraulic mulching should be applied as a separate
operation, when practical, to prevent the seeds from being encapsulated in
the mulch.
b See Table TS/PS-3 for seeding dates. Irrigation, if consistently applied,
may extend the use of cool season species during the summer months.
c Seeding rates should be doubled if seed is broadcast, or increased by 50
percent if done using a Brillion Drill or by hydraulic seeding.
EC-2 Temporary and Permanent Seeding (TS/PS)
TS/PS-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Table TS/PS-2. Minimum Drill Seeding Rates for Perennial Grasses
Common
a
Name
Botanical
Name
Growth
Seasonb
Growth
Form
Seeds/
Pound
Pounds of
PLS/acre
Alakali Soil Seed Mix
Alkali sacaton Sporobolus airoides Cool Bunch 1,750,000 0.25
Basin wildrye Elymus cinereus Cool Bunch 165,000 2.5
Sodar streambank wheatgrass Agropyron riparium 'Sodar' Cool Sod 170,000 2.5
Jose tall wheatgrass Agropyron elongatum 'Jose' Cool Bunch 79,000 7.0
Arriba western wheatgrass Agropyron smithii 'Arriba' Cool Sod 110,000 5.5
Total 17.75
Fertile Loamy Soil Seed Mix
Ephriam crested wheatgrass Agropyron cristatum
'Ephriam' Cool Sod 175,000 2.0
Dural hard fescue Festuca ovina 'duriuscula' Cool Bunch 565,000 1.0
Lincoln smooth brome Bromus inermis leyss
'Lincoln' Cool Sod 130,000 3.0
Sodar streambank wheatgrass Agropyron riparium 'Sodar' Cool Sod 170,000 2.5
Arriba western wheatgrass Agropyron smithii 'Arriba' Cool Sod 110,000 7.0
Total 15.5
High Water Table Soil Seed Mix
Meadow foxtail Alopecurus pratensis Cool Sod 900,000 0.5
Redtop Agrostis alba Warm Open sod 5,000,000 0.25
Reed canarygrass Phalaris arundinacea Cool Sod 68,000 0.5
Lincoln smooth brome Bromus inermis leyss
'Lincoln' Cool Sod 130,000 3.0
Pathfinder switchgrass Panicum virgatum
'Pathfinder' Warm Sod 389,000 1.0
Alkar tall wheatgrass Agropyron elongatum
'Alkar' Cool Bunch 79,000 5.5
Total 10.75
Transition Turf Seed Mixc
Ruebens Canadian bluegrass Poa compressa 'Ruebens' Cool Sod 2,500,000 0.5
Dural hard fescue Festuca ovina 'duriuscula' Cool Bunch 565,000 1.0
Citation perennial ryegrass Lolium perenne 'Citation' Cool Sod 247,000 3.0
Lincoln smooth brome Bromus inermis leyss
'Lincoln' Cool Sod 130,000 3.0
Total 7.5
Temporary and Permanent Seeding (TS/PS) EC-2
November 2010 Urban Drainage and Flood Control District TS/PS-5
Urban Storm Drainage Criteria Manual Volume 3
Table TS/PS-2. Minimum Drill Seeding Rates for Perennial Grasses (cont.)
Common
Name
Botanical
Name
Growth
Seasonb
Growth
Form
Seeds/
Pound
Pounds of
PLS/acre
Sandy Soil Seed Mix
Blue grama Bouteloua gracilis Warm Sod-forming
bunchgrass 825,000 0.5
Camper little bluestem Schizachyrium scoparium
'Camper' Warm Bunch 240,000 1.0
Prairie sandreed Calamovilfa longifolia Warm Open sod 274,000 1.0
Sand dropseed Sporobolus cryptandrus Cool Bunch 5,298,000 0.25
Vaughn sideoats grama Bouteloua curtipendula
'Vaughn' Warm Sod 191,000 2.0
Arriba western wheatgrass Agropyron smithii 'Arriba' Cool Sod 110,000 5.5
Total 10.25
Heavy Clay, Rocky Foothill Seed Mix
Ephriam crested wheatgrass
d
Agropyron cristatum
'Ephriam' Cool Sod 175,000 1.5
Oahe Intermediate wheatgrass Agropyron intermedium
'Oahe' Cool Sod 115,000 5.5
Vaughn sideoats grama
e
Bouteloua curtipendula
'Vaughn' Warm Sod 191,000 2.0
Lincoln smooth brome Bromus inermis leyss
'Lincoln' Cool Sod 130,000 3.0
Arriba western wheatgrass Agropyron smithii 'Arriba' Cool Sod 110,000 5.5
Total 17.5
a All of the above seeding mixes and rates are based on drill seeding followed by crimped hay or straw mulch. These rates
should be doubled if seed is broadcast and should be increased by 50 percent if the seeding is done using a Brillion Drill or is
applied through hydraulic seeding. Hydraulic seeding may be substituted for drilling only where slopes are steeper than 3:1.
If hydraulic seeding is used, hydraulic mulching should be done as a separate operation.
b
See Table TS/PS-3 for seeding dates.
c
If site is to be irrigated, the transition turf seed rates should be doubled.
d
Crested wheatgrass should not be used on slopes steeper than 6H to 1V.
e
Can substitute 0.5 lbs PLS of blue grama for the 2.0 lbs PLS of Vaughn sideoats grama.
EC-2 Temporary and Permanent Seeding (TS/PS)
TS/PS-6 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Table TS/PS-3. Seeding Dates for Annual and Perennial Grasses
Annual Grasses
(Numbers in table reference
species in Table TS/PS-1)
Perennial Grasses
Seeding Dates Warm Cool Warm Cool
January 1–March 15
March 16–April 30 4 1,2,3
May 1–May 15 4
May 16–June 30 4,5,6,7
July 1–July 15 5,6,7
July 16–August 31
September 1–September 30 8,9,10,11
October 1–December 31
Mulch
Cover seeded areas with mulch or an appropriate rolled erosion control product to promote establishment
of vegetation. Anchor mulch by crimping, netting or use of a non-toxic tackifier. See the Mulching BMP
Fact Sheet for additional guidance.
Maintenance and Removal
Monitor and observe seeded areas to identify areas of poor growth or areas that fail to germinate. Reseed
and mulch these areas, as needed.
An area that has been permanently seeded should have a good stand of vegetation within one growing
season if irrigated and within three growing seasons without irrigation in Colorado. Reseed portions of
the site that fail to germinate or remain bare after the first growing season.
Seeded areas may require irrigation, particularly during extended dry periods. Targeted weed control may
also be necessary.
Protect seeded areas from construction equipment and vehicle access.
Mulching (MU) EC-4
November 2010 Urban Drainage and Flood Control District MU-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph MU-1. An area that was recently seeded, mulched,
and crimped.
Description
Mulching consists of evenly applying
straw, hay, shredded wood mulch, bark or
compost to disturbed soils and securing
the mulch by crimping, tackifiers, netting
or other measures. 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.
Mulch can be applied either using
standard mechanical dry application
methods or using hydromulching equipment
that hydraulically applies a slurry of water,
wood fiber mulch, and often a tackifier.
Appropriate Uses
Use mulch in conjunction with seeding to help protect the seedbed and stabilize the soil. Mulch can also
be used as a temporary cover on low to mild slopes to help temporarily stabilize disturbed areas where
growing season constraints prevent effective reseeding. Disturbed areas should be properly mulched and
tacked, or seeded, mulched and tacked promptly after final grade is reached (typically within no longer
than 14 days) on portions of the site not otherwise permanently stabilized.
Standard dry mulching is encouraged in most jurisdictions; however, hydromulching may not be allowed
in certain jurisdictions or may not be allowed near waterways.
Do not apply mulch during windy conditions.
Design and Installation
Prior to mulching, surface-roughen areas by rolling with a crimping or punching type roller or by track
walking. Track walking should only be used where other methods are impractical because track walking
with heavy equipment typically compacts the soil.
A variety of mulches can be used effectively at construction
sites, including the following types:
Mulch
Functions
Erosion Control Yes
Sediment Control Moderate
Site/Material Management No
EC-4 Mulching (MU)
MU-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Clean, weed- and seed-free, long-stemmed grass hay (preferred) or cereal grain straw. Hay is preferred
because it is less susceptible to removal by wind. Mulch should be applied evenly at a rate of 2 tons per
acre and must be tacked or fastened by an approved method suitable for the type of mulch used. At least
50 percent of the grass hay mulch, by weight, should be 10 inches or more in length.
Grass hay mulch must be anchored and not merely placed on the surface. This can be accomplished
mechanically by crimping or with the aid of tackifiers or nets. Anchoring with a crimping implement is
preferred, and is the recommended method for areas flatter than 3:1. Mechanical crimpers must be
capable of tucking the long mulch fibers into the soil to a depth of 3 inches without cutting them. An
agricultural disk, while not an ideal substitute, may work if the disk blades are dull or blunted and set
vertically; however, the frame may have to be weighted to afford proper soil penetration.
On small areas sheltered from the wind and heavy runoff, spraying a tackifier on the mulch is satisfactory
for holding it in place. For steep slopes and special situations where greater control is needed, erosion
control blankets anchored with stakes should be used instead of mulch.
Hydraulic mulching consists of wood cellulose fibers mixed with water and a tackifying agent and should
be applied at a rate of no less than 1,500 pounds per acre (1,425 lbs of fibers mixed with at least 75 lbs of
tackifier) with a hydraulic mulcher. For steeper slopes, up to 2000 pounds per acre may be required for
effective hydroseeding. Hydromulch typically requires up to 24 hours to dry; therefore, it should not be
applied immediately prior to inclement weather. Application to roads, waterways and existing vegetation
should be avoided.
Erosion control mats, blankets, or nets are recommended to help stabilize steep slopes (generally 3:1 and
steeper) and waterways. Depending on the product, these may be used alone or in conjunction with grass
or straw mulch. Normally, use of these products will be restricted to relatively small areas.
Biodegradable mats made of straw and jute, straw-coconut, coconut fiber, or excelsior can be used instead
of mulch. (See the ECM/TRM BMP for more information.)
Some tackifiers or binders may be used to anchor mulch. Check with the local jurisdiction for allowed
tackifiers. Manufacturer's recommendations should be followed at all times. (See the Soil Binder BMP
for more information on general types of tackifiers.)
Rock can also be used as mulch. It provides protection of exposed soils to wind and water erosion and
allows infiltration of precipitation. An aggregate base course can be spread on disturbed areas for
temporary or permanent stabilization. The rock mulch layer should be thick enough to provide full
coverage of exposed soil on the area it is applied.
Maintenance and Removal
After mulching, the bare ground surface should not be more than 10 percent exposed. Reapply mulch, as
needed, to cover bare areas.
Wind Erosion/Dust Control (DC) EC-14
November 2010 Urban Drainage and Flood Control District DC-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph DC-1. Water truck used for dust suppression. Photo
courtesy of Douglas County.
Description
Wind erosion and dust control BMPs
help to keep soil particles from entering
the air as a result of land disturbing
construction activities. These BMPs
include a variety of practices generally
focused on either graded disturbed areas
or construction roadways. For graded
areas, practices such as seeding and
mulching, use of soil binders, site
watering, or other practices that provide
prompt surface cover should be used.
For construction roadways, road
watering and stabilized surfaces should
be considered.
Appropriate Uses
Dust control measures should be used on any site where dust poses a problem to air quality. Dust control
is important to control for the health of construction workers and surrounding waterbodies.
Design and Installation
The following construction BMPs can be used for dust control:
An irrigation/sprinkler system can be used to wet the top layer of disturbed soil to help keep dry soil
particles from becoming airborne.
Seeding and mulching can be used to stabilize disturbed surfaces and reduce dust emissions.
Protecting existing vegetation can help to slow wind velocities across the ground surface, thereby
limiting the likelihood of soil particles to become airborne.
Spray-on soil binders form a bond between soil particles keeping them grounded. Chemical
treatments may require additional permitting requirements. Potential impacts to surrounding
waterways and habitat must be considered prior to use.
Placing rock on construction roadways and entrances will help keep dust to a minimum across the
construction site.
Wind fences can be installed on site to reduce wind
speeds. Install fences perpendicular to the prevailing
wind direction for maximum effectiveness.
Maintenance and Removal
When using an irrigation/sprinkler control system to aid in
dust control, be careful not to overwater. Overwatering will
cause construction vehicles to track mud off-site.
Wind Erosion Control/
Dust Control
Functions
Erosion Control Yes
Sediment Control No
Site/Material Management Moderate
Concrete Washout Area (CWA) MM-1
November 2010 Urban Drainage and Flood Control District CWA-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph CWA-1. Example of concrete washout area. Note gravel
tracking pad for access and sign.
Description
Concrete waste management involves
designating and properly managing a
specific area of the construction site as a
concrete washout area. A concrete
washout area can be created using one of
several approaches designed to receive
wash water from washing of tools and
concrete mixer chutes, liquid concrete
waste from dump trucks, mobile batch
mixers, or pump trucks. Three basic
approaches are available: excavation of a
pit in the ground, use of an above ground
storage area, or use of prefabricated haul-
away concrete washout containers.
Surface discharges of concrete washout
water from construction sites are prohibited.
Appropriate Uses
Concrete washout areas must be designated on all sites that will generate concrete wash water or liquid
concrete waste from onsite concrete mixing or concrete delivery.
Because pH is a pollutant of concern for washout activities, when unlined pits are used for concrete
washout, the soil must have adequate buffering capacity to result in protection of state groundwater
standards; otherwise, a liner/containment must be used. The following management practices are
recommended to prevent an impact from unlined pits to groundwater:
The use of the washout site should be temporary (less than 1 year), and
The washout site should be not be located in an area where shallow groundwater may be present, such
as near natural drainages, springs, or wetlands.
Design and Installation
Concrete washout activities must be conducted in a manner that does not contribute pollutants to surface
waters or stormwater runoff. Concrete washout areas may be lined or unlined excavated pits in the
ground, commercially manufactured prefabricated washout containers, or aboveground holding areas
constructed of berms, sandbags or straw bales with a plastic liner.
Although unlined washout areas may be used, lined pits may be required to protect groundwater under
certain conditions.
Do not locate an unlined washout area within 400 feet
of any natural drainage pathway or waterbody or
within 1,000 feet of any wells or drinking water
sources. Even for lined concrete washouts, it is
advisable to locate the facility away from waterbodies
and drainage paths. If site constraints make these
Concrete Washout Area
Functions
Erosion Control No
Sediment Control No
Site/Material Management Yes
MM-1 Concrete Washout Area (CWA)
CWA-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
setbacks infeasible or if highly permeable soils exist in the area, then the pit must be installed with an
impermeable liner (16 mil minimum thickness) or surface storage alternatives using prefabricated
concrete washout devices or a lined aboveground storage area should be used.
Design details with notes are provided in Detail CWA-1 for pits and CWA-2 for aboveground storage
areas. Pre-fabricated concrete washout container information can be obtained from vendors.
Maintenance and Removal
A key consideration for concrete washout areas is to ensure that adequate signage is in place identifying
the location of the washout area. Part of inspecting and maintaining washout areas is ensuring that
adequate signage is provided and in good repair and that the washout area is being used, as opposed to
washout in non-designated areas of the site.
Remove concrete waste in the washout area, as needed to maintain BMP function (typically when filled to
about two-thirds of its capacity). Collect concrete waste and deliver offsite to a designated disposal
location.
Upon termination of use of the washout site, accumulated solid waste, including concrete waste and any
contaminated soils, must be removed from the site to prevent on-site disposal of solid waste. If the wash
water is allowed to evaporate and the concrete hardens, it may be recycled.
Photograph CWA-3. Earthen concrete washout. Photo
courtesy of CDOT.
Photograph CWA-2. Prefabricated concrete washout. Photo
courtesy of CDOT.
Concrete Washout Area (CWA) MM-1
November 2010 Urban Drainage and Flood Control District CWA-3
Urban Storm Drainage Criteria Manual Volume 3
MM-1 Concrete Washout Area (CWA)
CWA-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Stockpile Management (SP) MM-2
November 2010 Urban Drainage and Flood Control District SP-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph SP-1. A topsoil stockpile that has been partially
revegetated and is protected by silt fence perimeter control.
Description
Stockpile management includes
measures to minimize erosion and
sediment transport from soil stockpiles.
Appropriate Uses
Stockpile management should be used
when soils or other erodible materials
are stored at the construction site.
Special attention should be given to
stockpiles in close proximity to natural
or manmade storm systems.
Design and Installation
Locate stockpiles away from all drainage system components including storm sewer inlets. Where
practical, choose stockpile locations that that will remain undisturbed for the longest period of time as the
phases of construction progress. Place sediment control BMPs around the perimeter of the stockpile, such
as sediment control logs, rock socks, silt fence, straw bales and sand bags. See Detail SP-1 for guidance
on proper establishment of perimeter controls around a stockpile. For stockpiles in active use, provide a
stabilized designated access point on the upgradient side of the stockpile.
Stabilize the stockpile surface with surface roughening, temporary seeding and mulching, erosion control
blankets, or soil binders. Soils stockpiled for an extended period (typically for more than 60 days) should
be seeded and mulched with a temporary grass cover once the stockpile is placed (typically within 14
days). Use of mulch only or a soil binder is acceptable if the stockpile will be in place for a more limited
time period (typically 30-60 days). Timeframes for stabilization of stockpiles noted in this fact sheet are
"typical" guidelines. Check permit requirements for specific federal, state, and/or local requirements that
may be more prescriptive.
Stockpiles should not be placed in streets or paved areas unless no other practical alternative exists. See
the Stabilized Staging Area Fact Sheet for guidance when staging in roadways is unavoidable due to
space or right-of-way constraints. For paved areas, rock socks must be used for perimeter control and all
inlets with the potential to receive sediment from the stockpile (even from vehicle tracking) must be
protected.
Maintenance and Removal
Inspect perimeter controls and inlet protection in accordance with their respective BMP Fact Sheets.
Where seeding, mulch and/or soil binders are used, reseeding or reapplication of soil binder may be
necessary.
When temporary removal of a perimeter BMP is necessary
to access a stockpile, ensure BMPs are reinstalled in
accordance with their respective design detail section.
Stockpile Management
Functions
Erosion Control Yes
Sediment Control Yes
Site/Material Management Yes
MM-2 Stockpile Management (SM)
SP-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
When the stockpile is no longer needed, properly dispose of excess materials and revegetate or otherwise
stabilize the ground surface where the stockpile was located.
Stockpile Management (SP) MM-2
November 2010 Urban Drainage and Flood Control District SP-3
Urban Storm Drainage Criteria Manual Volume 3
MM-2 Stockpile Management (SM)
SP-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Stockpile Management (SP) MM-2
November 2010 Urban Drainage and Flood Control District SP-5
Urban Storm Drainage Criteria Manual Volume 3
MM-2 Stockpile Management (SM)
SP-6 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Good Housekeeping Practices (GH) MM-3
November 2010 Urban Drainage and Flood Control District GH-1
Urban Storm Drainage Criteria Manual Volume 3
Photographs GH-1 and GH-2. Proper materials
storage and secondary containment for fuel tanks
are important good housekeeping practices. Photos
courtesy of CDOT and City of Aurora.
Description
Implement construction site good housekeeping practices to
prevent pollution associated with solid, liquid and hazardous
construction-related materials and wastes. Stormwater
Management Plans (SWMPs) should clearly specify BMPs
including these good housekeeping practices:
Provide for waste management.
Establish proper building material staging areas.
Designate paint and concrete washout areas.
Establish proper equipment/vehicle fueling and
maintenance practices.
Control equipment/vehicle washing and allowable non-
stormwater discharges.
Develop a spill prevention and response plan.
Acknowledgement: This Fact Sheet is based directly on
EPA guidance provided in Developing Your Stormwater
Pollution Prevent Plan (EPA 2007).
Appropriate Uses
Good housekeeping practices are necessary at all construction sites.
Design and Installation
The following principles and actions should be addressed in SWMPs:
Provide for Waste Management. Implement management procedures and practices to prevent or
reduce the exposure and transport of pollutants in stormwater from solid, liquid and sanitary wastes
that will be generated at the site. Practices such as trash disposal, recycling, proper material handling,
and cleanup measures can reduce the potential for stormwater runoff to pick up construction site
wastes and discharge them to surface waters. Implement a comprehensive set of waste-management
practices for hazardous or toxic materials, such as paints, solvents, petroleum products, pesticides,
wood preservatives, acids, roofing tar, and other materials. Practices should include storage,
handling, inventory, and cleanup procedures, in case of spills. Specific practices that should be
considered include:
Solid or Construction Waste
o Designate trash and bulk waste-collection areas on-
site.
Good Housekeeping
Functions
Erosion Control No
Sediment Control No
Site/Material Management Yes
MM-3 Good Housekeeping Practices (GH)
GH-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Photograph GH-3. Locate portable toilet facilities on level
surfaces away from waterways and storm drains. Photo
courtesy of WWE.
o Recycle materials whenever possible (e.g., paper, wood, concrete, oil).
o Segregate and provide proper disposal options for hazardous material wastes.
o Clean up litter and debris from the construction site daily.
o Locate waste-collection areas away from streets, gutters, watercourses, and storm drains. Waste-
collection areas (dumpsters, and such) are often best located near construction site entrances to
minimize traffic on disturbed soils. Consider secondary containment around waste collection
areas to minimize the likelihood of contaminated discharges.
o Empty waste containers before they are full and overflowing.
Sanitary and Septic Waste
o Provide convenient, well-maintained, and properly located toilet facilities on-site.
o Locate toilet facilities away from storm drain inlets and waterways to prevent accidental spills
and contamination of stormwater.
o Maintain clean restroom facilities and empty portable toilets regularly.
o Where possible, provide secondary containment pans under portable toilets.
o Provide tie-downs or stake-downs for portable toilets.
o Educate employees, subcontractors, and suppliers on locations of facilities.
o Treat or dispose of sanitary and septic waste in accordance with state or local regulations. Do not
discharge or bury wastewater at the construction site.
o Inspect facilities for leaks. If found, repair or replace immediately.
o Special care is necessary during maintenance (pump out) to ensure that waste and/or biocide are
not spilled on the ground.
Hazardous Materials and Wastes
o Develop and implement employee and
subcontractor education, as needed, on
hazardous and toxic waste handling,
storage, disposal, and cleanup.
o Designate hazardous waste-collection
areas on-site.
o Place all hazardous and toxic material
wastes in secondary containment.
Good Housekeeping Practices (GH) MM-3
November 2010 Urban Drainage and Flood Control District GH-3
Urban Storm Drainage Criteria Manual Volume 3
o Hazardous waste containers should be inspected to ensure that all containers are labeled properly
and that no leaks are present.
Establish Proper Building Material Handling and Staging Areas. The SWMP should include
comprehensive handling and management procedures for building materials, especially those that are
hazardous or toxic. Paints, solvents, pesticides, fuels and oils, other hazardous materials or building
materials that have the potential to contaminate stormwater should be stored indoors or under cover
whenever possible or in areas with secondary containment. Secondary containment measures prevent
a spill from spreading across the site and may include dikes, berms, curbing, or other containment
methods. Secondary containment techniques should also ensure the protection of groundwater.
Designate staging areas for activities such as fueling vehicles, mixing paints, plaster, mortar, and
other potential pollutants. Designated staging areas enable easier monitoring of the use of materials
and clean up of spills. Training employees and subcontractors is essential to the success of this
pollution prevention principle. Consider the following specific materials handling and staging
practices:
o Train employees and subcontractors in proper handling and storage practices.
o Clearly designate site areas for staging and storage with signs and on construction drawings.
Staging areas should be located in areas central to the construction site. Segment the staging area
into sub-areas designated for vehicles, equipment, or stockpiles. Construction entrances and exits
should be clearly marked so that delivery vehicles enter/exit through stabilized areas with vehicle
tracking controls (See Vehicle Tracking Control Fact Sheet).
o Provide storage in accordance with Spill Protection, Control and Countermeasures (SPCC)
requirements and plans and provide cover and impermeable perimeter control, as necessary, for
hazardous materials and contaminated soils that must be stored on site.
o Ensure that storage containers are regularly inspected for leaks, corrosion, support or foundation
failure, or other signs of deterioration and tested for soundness.
o Reuse and recycle construction materials when possible.
Designate Concrete Washout Areas. Concrete contractors should be encouraged to use the washout
facilities at their own plants or dispatch facilities when feasible; however, concrete washout
commonly occurs on construction sites. If it is necessary to provide for concrete washout areas on-
site, designate specific washout areas and design facilities to handle anticipated washout water.
Washout areas should also be provided for paint and stucco operations. Because washout areas can
be a source of pollutants from leaks or spills, care must be taken with regard to their placement and
proper use. See the Concrete Washout Area Fact Sheet for detailed guidance.
Both self-constructed and prefabricated washout containers can fill up quickly when concrete, paint,
and stucco work are occurring on large portions of the site. Be sure to check for evidence that
contractors are using the washout areas and not dumping materials onto the ground or into drainage
facilities. If the washout areas are not being used regularly, consider posting additional signage,
relocating the facilities to more convenient locations, or providing training to workers and
contractors.
When concrete, paint, or stucco is part of the construction process, consider these practices which will
help prevent contamination of stormwater. Include the locations of these areas and the maintenance
and inspection procedures in the SWMP.
MM-3 Good Housekeeping Practices (GH)
GH-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
o Do not washout concrete trucks or equipment into storm drains, streets, gutters, uncontained
areas, or streams. Only use designated washout areas.
o Establish washout areas and advertise their locations with signs. Ensure that signage remains in
good repair.
o Provide adequate containment for the amount of wash water that will be used.
o Inspect washout structures daily to detect leaks or tears and to identify when materials need to be
removed.
o Dispose of materials properly. The preferred method is to allow the water to evaporate and to
recycle the hardened concrete. Full service companies may provide dewatering services and
should dispose of wastewater properly. Concrete wash water can be highly polluted. It should
not be discharged to any surface water, storm sewer system, or allowed to infiltrate into the
ground in the vicinity of waterbodies. Washwater should not be discharged to a sanitary sewer
system without first receiving written permission from the system operator.
Establish Proper Equipment/Vehicle Fueling and Maintenance Practices. Create a clearly
designated on-site fueling and maintenance area that is clean and dry. The on-site fueling area should
have a spill kit, and staff should know how to use it. If possible, conduct vehicle fueling and
maintenance activities in a covered area. Consider the following practices to help prevent the
discharge of pollutants to stormwater from equipment/vehicle fueling and maintenance. Include the
locations of designated fueling and maintenance areas and inspection and maintenance procedures in
the SWMP.
o Train employees and subcontractors in proper fueling procedures (stay with vehicles during
fueling, proper use of pumps, emergency shutoff valves, etc.).
o Inspect on-site vehicles and equipment regularly for leaks, equipment damage, and other service
problems.
o Clearly designate vehicle/equipment service areas away from drainage facilities and watercourses
to prevent stormwater run-on and runoff.
o Use drip pans, drip cloths, or absorbent pads when replacing spent fluids.
o Collect all spent fluids, store in appropriate labeled containers in the proper storage areas, and
recycle fluids whenever possible.
Control Equipment/Vehicle Washing and Allowable Non-Stormwater Discharges. Implement
practices to prevent contamination of surface and groundwater from equipment and vehicle wash
water. Representative practices include:
o Educate employees and subcontractors on proper washing procedures.
o Use off-site washing facilities, when available.
o Clearly mark the washing areas and inform workers that all washing must occur in this area.
o Contain wash water and treat it using BMPs. Infiltrate washwater when possible, but maintain
separation from drainage paths and waterbodies.
Good Housekeeping Practices (GH) MM-3
November 2010 Urban Drainage and Flood Control District GH-5
Urban Storm Drainage Criteria Manual Volume 3
o Use high-pressure water spray at vehicle washing facilities without detergents. Water alone can
remove most dirt adequately.
o Do not conduct other activities, such as vehicle repairs, in the wash area.
o Include the location of the washing facilities and the inspection and maintenance procedures in
the SWMP.
Develop a Spill Prevention and Response Plan. Spill prevention and response procedures must be
identified in the SWMP. Representative procedures include identifying ways to reduce the chance of
spills, stop the source of spills, contain and clean up spills, dispose of materials contaminated by
spills, and train personnel responsible for spill prevention and response. The plan should also specify
material handling procedures and storage requirements and ensure that clear and concise spill cleanup
procedures are provided and posted for areas in which spills may potentially occur. When developing
a spill prevention plan, include the following:
o Note the locations of chemical storage areas, storm drains, tributary drainage areas, surface
waterbodies on or near the site, and measures to stop spills from leaving the site.
o Provide proper handling and safety procedures for each type of waste. Keep Material Safety Data
Sheets (MSDSs) for chemical used on site with the SWMP.
o Establish an education program for employees and subcontractors on the potential hazards to
humans and the environment from spills and leaks.
o Specify how to notify appropriate authorities, such as police and fire departments, hospitals, or
municipal sewage treatment facilities to request assistance. Emergency procedures and contact
numbers should be provided in the SWMP and posted at storage locations.
o Describe the procedures, equipment and materials for immediate cleanup of spills and proper
disposal.
o Identify personnel responsible for implementing the plan in the event of a spill. Update the spill
prevention plan and clean up materials as changes occur to the types of chemicals stored and used
at the facility.
MM-3 Good Housekeeping Practices (GH)
GH-6 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Spill Prevention, Control, and Countermeasure (SPCC) Plan
Construction sites may be subject to 40 CFR Part 112 regulations that require the preparation and
implementation of a SPCC Plan to prevent oil spills from aboveground and underground storage tanks.
The facility is subject to this rule if it is a non-transportation-related facility that:
Has a total storage capacity greater than 1,320 gallons or a completely buried storage capacity
greater than 42,000 gallons.
Could reasonably be expected to discharge oil in quantities that may be harmful to navigable waters
of the United States and adjoining shorelines.
Furthermore, if the facility is subject to 40 CFR Part 112, the SWMP should reference the SPCC Plan.
To find out more about SPCC Plans, see EPA's website on SPPC at www.epa.gov/oilspill/spcc.htm.
Reporting Oil Spills
In the event of an oil spill, contact the National Response Center toll free at 1-800-424- 8802 for
assistance, or for more details, visit their website: www.nrc.uscg.mil.
Maintenance and Removal
Effective implementation of good housekeeping practices is dependent on clear designation of personnel
responsible for supervising and implementing good housekeeping programs, such as site cleanup and
disposal of trash and debris, hazardous material management and disposal, vehicle and equipment
maintenance, and other practices. Emergency response "drills" may aid in emergency preparedness.
Checklists may be helpful in good housekeeping efforts.
Staging and storage areas require permanent stabilization when the areas are no longer being used for
construction-related activities.
Construction-related materials, debris and waste must be removed from the construction site once
construction is complete.
Design Details
See the following Fact Sheets for related Design Details:
MM-1 Concrete Washout Area
MM-2 Stockpile Management
SM-4 Vehicle Tracking Control
Design details are not necessary for other good housekeeping practices; however, be sure to designate
where specific practices will occur on the appropriate construction drawings.
Silt Fence (SF) SC-1
November 2010 Urban Drainage and Flood Control District SF-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph SF-1. Silt fence creates a sediment barrier, forcing
sheet flow runoff to evaporate or infiltrate.
Description
A silt fence is a woven geotextile fabric
attached to wooden posts and trenched
into the ground. It is designed as a
sediment barrier to intercept sheet flow
runoff from disturbed areas.
Appropriate Uses
A silt fence can be used where runoff is
conveyed from a disturbed area as sheet
flow. Silt fence is not designed to
receive concentrated flow or to be used
as a filter fabric. Typical uses include:
Down slope of a disturbed area to
accept sheet flow.
Along the perimeter of a receiving
water such as a stream, pond or
wetland.
At the perimeter of a construction site.
Design and Installation
Silt fence should be installed along the contour of slopes so that it intercepts sheet flow. The maximum
recommended tributary drainage area per 100 lineal feet of silt fence, installed along the contour, is
approximately 0.25 acres with a disturbed slope length of up to 150 feet and a tributary slope gradient no
steeper than 3:1. Longer and steeper slopes require additional measures. This recommendation only
applies to silt fence installed along the contour. Silt fence installed for other uses, such as perimeter
control, should be installed in a way that will not produce concentrated flows. For example, a "J-hook"
installation may be appropriate to force runoff to pond and evaporate or infiltrate in multiple areas rather
than concentrate and cause erosive conditions parallel to the silt fence.
See Detail SF-1 for proper silt fence installation, which involves proper trenching, staking, securing the
fabric to the stakes, and backfilling the silt fence. Properly installed silt fence should not be easily pulled
out by hand and there should be no gaps between the ground and the fabric.
Silt fence must meet the minimum allowable strength requirements, depth of installation requirement, and
other specifications in the design details. Improper installation
of silt fence is a common reason for silt fence failure; however,
when properly installed and used for the appropriate purposes, it
can be highly effective.
Silt Fence
Functions
Erosion Control No
Sediment Control Yes
Site/Material Management No
SC-1 Silt Fence (SF)
SF-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Photograph SF-2. When silt fence is not installed along
the contour, a "J-hook" installation may be appropriate
to ensure that the BMP does not create concentrated
flow parallel to the silt fence. Photo courtesy of Tom
Gore.
Maintenance and Removal
Inspection of silt fence includes observing the
material for tears or holes and checking for slumping
fence and undercut areas bypassing flows. Repair of
silt fence typically involves replacing the damaged
section with a new section. Sediment accumulated
behind silt fence should be removed, as needed to
maintain BMP effectiveness, typically before it
reaches a depth of 6 inches.
Silt fence may be removed when the upstream area
has reached final stabilization.
Silt Fence (SF) SC-1
November 2010 Urban Drainage and Flood Control District SF-3
Urban Storm Drainage Criteria Manual Volume 3
SC-1 Silt Fence (SF)
SF-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Sediment Control Log (SCL) SC-2
November 2010 Urban Drainage and Flood Control District SCL-1
Urban Storm Drainage Criteria Manual Volume 3
Photographs SCL-1 and SCL-2. Sediment control logs used as 1) a
perimeter control around a soil stockpile; and, 2) as a "J-hook"
perimeter control at the corner of a construction site.
Description
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 are also often referred to
as "straw wattles." They are used as a
sediment barrier to intercept sheet flow
runoff from disturbed areas.
Appropriate Uses
Sediment control logs can be used in
the following applications to trap
sediment:
As perimeter control for stockpiles
and the site.
As part of inlet protection designs.
As check dams in small drainage
ditches. (Sediment control logs
are not intended for use in
channels with high flow
velocities.)
On disturbed slopes to shorten flow
lengths (as an erosion control).
As part of multi-layered perimeter control along a receiving water such as a stream, pond or wetland.
Sediment control logs work well in combination with other layers of erosion and sediment controls.
Design and Installation
Sediment control logs should be installed along the contour to avoid concentrating flows. The maximum
allowable tributary drainage area per 100 lineal feet of sediment control log, installed along the contour, is
approximately 0.25 acres with a disturbed slope length of up to 150 feet and a tributary slope gradient no
steeper than 3:1. Longer and steeper slopes require additional measures. This recommendation only
applies to sediment control logs installed along the contour. When installed for other uses, such as
perimeter control, it should be installed in a way that will not
produce concentrated flows. For example, a "J-hook"
installation may be appropriate to force runoff to pond and
evaporate or infiltrate in multiple areas rather than concentrate
and cause erosive conditions parallel to the BMP.
Sediment Control Log
Functions
Erosion Control Moderate
Sediment Control Yes
Site/Material Management No
SC-2 Sediment Control Log (SCL)
SCL-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Although sediment control logs initially allow runoff to flow through the BMP, they can quickly become
a barrier and should be installed is if they are impermeable.
Design details and notes for sediment control logs are provided in Detail SCL-1. Sediment logs must be
properly trenched and staked into the ground to prevent undercutting, bypassing and displacement. When
installed on slopes, sediment control logs should be installed along the contours (i.e., perpendicular to
flow).
Improper installation can lead to poor performance. Be sure that sediment control logs are properly
trenched, anchored and tightly jointed.
Maintenance and Removal
Be aware that sediment control logs will eventually degrade. Remove accumulated sediment before the
depth is one-half the height of the sediment log and repair damage to the sediment log, typically by
replacing the damaged section.
Once the upstream area is stabilized, remove and properly dispose of the logs. Areas disturbed beneath
the logs may need to be seeded and mulched. Sediment control logs that are biodegradable may
occasionally be left in place (e.g., when logs are used in conjunction with erosion control blankets as
permanent slope breaks). However, removal of sediment control logs after final stabilization is typically
recommended when used in perimeter control, inlet protection and check dam applications.
Sediment Control Log (SCL) SC-2
November 2010 Urban Drainage and Flood Control District SCL-3
Urban Storm Drainage Criteria Manual Volume 3
SC-2 Sediment Control Log (SCL)
SCL-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Sediment Control Log (SCL) SC-2
November 2010 Urban Drainage and Flood Control District SCL-5
Urban Storm Drainage Criteria Manual Volume 3
Rock Sock (RS) SC-5
November 2010 Urban Drainage and Flood Control District RS-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph RS-1. Rock socks placed at regular intervals in a curb
line can help reduce sediment loading to storm sewer inlets. Rock
socks can also be used as perimeter controls.
Description
A rock sock is constructed of gravel
that has been wrapped by wire mesh or
a geotextile to form an elongated
cylindrical filter. Rock socks are
typically used either as a perimeter
control or as part of inlet protection.
When placed at angles in the curb line,
rock socks are typically referred to as
curb socks. Rock socks are intended to
trap sediment from stormwater runoff
that flows onto roadways as a result of
construction activities.
Appropriate Uses
Rock socks can be used at the perimeter
of a disturbed area to control localized
sediment loading. A benefit of rock
socks as opposed to other perimeter controls is that they do not have to be trenched or staked into the
ground; therefore, they are often used on roadway construction projects where paved surfaces are present.
Use rock socks in inlet protection applications when the construction of a roadway is substantially
complete and the roadway has been directly connected to a receiving storm system.
Design and Installation
When rock socks are used as perimeter controls, the maximum recommended tributary drainage area per
100 lineal feet of rock socks is approximately 0.25 acres with disturbed slope length of up to 150 feet and
a tributary slope gradient no steeper than 3:1. A rock sock design detail and notes are provided in Detail
RS-1. Also see the Inlet Protection Fact Sheet for design and installation guidance when rock socks are
used for inlet protection and in the curb line.
When placed in the gutter adjacent to a curb, rock socks should protrude no more than two feet from the
curb in order for traffic to pass safely. If located in a high traffic area, place construction markers to alert
drivers and street maintenance workers of their presence.
Maintenance and Removal
Rock socks are susceptible to displacement and breaking due to vehicle traffic. Inspect rock socks for
damage and repair or replace as necessary. Remove sediment by sweeping or vacuuming as needed to
maintain the functionality of the BMP, typically when sediment
has accumulated behind the rock sock to one-half of the sock's
height.
Once upstream stabilization is complete, rock socks and
accumulated sediment should be removed and properly disposed.
Rock Sock
Functions
Erosion Control No
Sediment Control Yes
Site/Material Management No
SC-5 Rock Sock (RS)
RS-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Rock Sock (RS) SC-5
November 2010 Urban Drainage and Flood Control District RS-3
Urban Storm Drainage Criteria Manual Volume 3
Inlet Protection (IP) SC-6
November 2010 Urban Drainage and Flood Control District IP-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph IP-1. Inlet protection for a curb opening inlet.
Description
Inlet protection consists of permeable
barriers installed around an inlet to
filter runoff and remove sediment prior
to entering a storm drain inlet. Inlet
protection can be constructed from rock
socks, sediment control logs, silt fence,
block and rock socks, or other materials
approved by the local jurisdiction.
Area inlets can also be protected by
over-excavating around the inlet to
form a sediment trap.
Appropriate Uses
Install protection at storm sewer inlets
that are operable during construction.
Consider the potential for tracked-out
sediment or temporary stockpile areas to contribute sediment to inlets when determining which inlets
must be protected. This may include inlets in the general proximity of the construction area, not limited
to downgradient inlets. Inlet protection is not
Design and Installation
a stand-alone BMP and should be used in conjunction with
other upgradient BMPs.
To function effectively, inlet protection measures must be installed to ensure that flows do not bypass the
inlet protection and enter the storm drain without treatment. However, designs must also enable the inlet
to function without completely blocking flows into the inlet in a manner that causes localized flooding.
When selecting the type of inlet protection, consider factors such as type of inlet (e.g., curb or area, sump
or on-grade conditions), traffic, anticipated flows, ability to secure the BMP properly, safety and other
site-specific conditions. For example, block and rock socks will be better suited to a curb and gutter
along a roadway, as opposed to silt fence or sediment control logs, which cannot be properly secured in a
curb and gutter setting, but are effective area inlet protection measures.
Several inlet protection designs are provided in the Design Details. Additionally, a variety of proprietary
products are available for inlet protection that may be approved for use by local governments. If
proprietary products are used, design details and installation procedures from the manufacturer must be
followed. Regardless of the type of inlet protection selected, inlet protection is most effective when
combined with other BMPs such as curb socks and check dams. Inlet protection is often the last barrier
before runoff enters the storm sewer or receiving water.
Design details with notes are provided for these forms of inlet
protection:
IP-1. Block and Rock Sock Inlet Protection for Sump or On-grade
Inlets
IP-2. Curb (Rock) Socks Upstream of Inlet Protection, On-grade
Inlets
Inlet Protection
(various forms)
Functions
Erosion Control No
Sediment Control Yes
Site/Material Management No
SC-6 Inlet Protection (IP)
IP-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
IP-3. Rock Sock Inlet Protection for Sump/Area Inlet
IP-4. Silt Fence Inlet Protection for Sump/Area Inlet
IP-5. Over-excavation Inlet Protection
IP-6. Straw Bale Inlet Protection for Sump/Area Inlet
CIP-1. Culvert Inlet Protection
Propriety inlet protection devices should be installed in accordance with manufacturer specifications.
More information is provided below on selecting inlet protection for sump and on-grade locations.
Inlets Located in a Sump
When applying inlet protection in sump conditions, it is important that the inlet continue to function
during larger runoff events. For curb inlets, the maximum height of the protective barrier should be lower
than the top of the curb opening to allow overflow into the inlet during larger storms without excessive
localized flooding. If the inlet protection height is greater than the curb elevation, particularly if the filter
becomes clogged with sediment, runoff will not enter the inlet and may bypass it, possibly causing
localized flooding, public safety issues, and downstream erosion and damage from bypassed flows.
Area inlets located in a sump setting can be protected through the use of silt fence, concrete block and
rock socks (on paved surfaces), sediment control logs/straw wattles embedded in the adjacent soil and
stacked around the area inlet (on pervious surfaces), over-excavation around the inlet, and proprietary
products providing equivalent functions.
Inlets Located on a Slope
For curb and gutter inlets on paved sloping streets, block and rock sock inlet protection is recommended
in conjunction with curb socks in the gutter leading to the inlet. For inlets located along unpaved roads,
also see the Check Dam Fact Sheet.
Maintenance and Removal
Inspect inlet protection frequently. Inspection and maintenance guidance includes:
Inspect for tears that can result in sediment directly entering the inlet, as well as result in the contents
of the BMP (e.g., gravel) washing into the inlet.
Check for improper installation resulting in untreated flows bypassing the BMP and directly entering
the inlet or bypassing to an unprotected downstream inlet. For example, silt fence that has not been
properly trenched around the inlet can result in flows under the silt fence and directly into the inlet.
Look for displaced BMPs that are no longer protecting the inlet. Displacement may occur following
larger storm events that wash away or reposition the inlet protection. Traffic or equipment may also
crush or displace the BMP.
Monitor sediment accumulation upgradient of the inlet protection.
Inlet Protection (IP) SC-6
November 2010 Urban Drainage and Flood Control District IP-3
Urban Storm Drainage Criteria Manual Volume 3
Remove sediment accumulation from the area upstream of the inlet protection, as needed to maintain
BMP effectiveness, typically when it reaches no more than half the storage capacity of the inlet
protection. For silt fence, remove sediment when it accumulates to a depth of no more than 6 inches.
Remove sediment accumulation from the area upstream of the inlet protection as needed to maintain
the functionality of the BMP.
Propriety inlet protection devices should be inspected and maintained in accordance with
manufacturer specifications. If proprietary inlet insert devices are used, sediment should be removed
in a timely manner to prevent devices from breaking and spilling sediment into the storm drain.
Inlet protection must be removed and properly disposed of when the drainage area for the inlet has
reached final stabilization.
SC-6 Inlet Protection (IP)
IP-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Inlet Protection (IP) SC-6
November 2010 Urban Drainage and Flood Control District IP-5
Urban Storm Drainage Criteria Manual Volume 3
SC-6 Inlet Protection (IP)
IP-6 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Inlet Protection (IP) SC-6
November 2010 Urban Drainage and Flood Control District IP-7
Urban Storm Drainage Criteria Manual Volume 3
Vegetated Buffers (VB) SC-9
November 2010 Urban Drainage and Flood Control District VB-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph VB-1. A vegetated buffer is maintained between the
area of active construction and the drainage swale. Photo courtesy
of WWE.
Description
Buffer strips of preserved natural
vegetation or grass help protect
waterways and wetlands from land
disturbing activities. Vegetated buffers
improve stormwater runoff quality by
straining sediment, promoting
infiltration, and slowing runoff
velocities.
Appropriate Uses
Vegetated buffers can be used to
separate land disturbing activities and
natural surface waters or conveyances.
In many jurisdictions, local governments
require some type of setback from natural waterways. Concentrated flow should not be directed through
a buffer; instead, runoff should be in the form of sheet flow. Vegetated buffers are typically used in
combination with other perimeter control BMPs such as sediment control logs or silt fence for multi-
layered protection.
Design and Installation
Minimum buffer widths may vary based on local regulations. Clearly delineate the boundary of the
natural buffer area using construction fencing, silt fence, or a comparable technique. In areas that have
been cleared and graded, vegetated buffers such as sod can also be installed to create or restore a
vegetated buffer around the perimeter of the site.
Maintenance and Removal
Inspect buffer areas for signs of erosion such as gullies or rills. Stabilize eroding areas, as needed. If
erosion is due to concentrated flow conditions, it may be necessary to install a level spreader or other
technique to restore sheet flow conditions. Inspect perimeter controls delineating the vegetative buffer
and repair or replace as needed.
Vegetated Buffers
Functions
Erosion Control Moderate
Sediment Control Yes
Site/Material Management Yes
Protection of Existing Vegetation (PV) SM-2
November 2010 Urban Drainage and Flood Control District PV-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph PV-1. Protection of existing vegetation and a sensitive
area. Photo courtesy of CDOT.
Description
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 upgradient areas are
disturbed, it may also be necessary to
install perimeter controls to minimize
sediment loading to sensitive areas such as
wetlands. Existing vegetation may be
designated for protection to maintain a
stable surface cover as part of construction
phasing, or vegetation may be protected in
areas designated to remain in natural
condition under post-development
conditions (e.g., wetlands, mature trees,
riparian areas, open space).
Appropriate Uses
Existing vegetation should be preserved for the maximum practical duration on a construction site
through the use of effective construction phasing. Preserving vegetation helps to minimize erosion and
can reduce revegetation costs following construction.
Protection of wetland areas is required under the Clean Water Act, unless a permit has been obtained from
the U.S. Army Corps of Engineers (USACE) allowing impacts in limited areas.
If trees are to be protected as part of post-development landscaping, care must be taken to avoid several
types of damage, some of which may not be apparent at the time of injury. Potential sources of injury
include soil compaction during grading or due to construction traffic, direct equipment-related injury such
as bark removal, branch breakage, surface grading and trenching, and soil cut and fill. In order to
minimize injuries that may lead to immediate or later death of the tree, tree protection zones should be
developed during site design, implemented at the beginning of a construction project, as well as continued
during active construction.
Design and Installation
General
Once an area has been designated as a preservation area, there should be no construction activity allowed
within a set distance of the area. Clearly mark the area with construction fencing. Do not allow
stockpiles, equipment, trailers or parking within the
protected area. Guidelines to protect various types of
existing vegetation follow.
Protection of Existing Vegetation
Functions
Erosion Control Yes
Sediment Control Moderate
Site/Material Management Yes
SM-2 Protection of Existing Vegetation (PV)
PV-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Surface Cover During Phased Construction
Install construction fencing or other perimeter controls around areas to be protected from clearing and
grading as part of construction phasing.
Maintaining surface cover on steep slopes for the maximum practical duration during construction is
recommended.
Open Space Preservation
Where natural open space areas will be preserved as part of a development, it is important to install
construction fencing around these areas to protect them from compaction. This is particularly important
when areas with soils with high infiltration rates are preserved as part of LID designs. Preserved open
space areas should not be used for staging and equipment storage.
Wetlands and Riparian Areas
Install a construction fence around the perimeter of the wetland or riparian (streamside vegetation) area to
prevent access by equipment. In areas downgradient of disturbed areas, install a perimeter control such as
silt fence, sediment control logs, or similar measure to minimize sediment loading to the wetland.
Tree Protection
1
Before beginning construction operations, establish a tree protection zone around trees to be
preserved by installing construction fences. Allow enough space from the trunk to protect the root
zone from soil compaction and mechanical damage, and the branches from mechanical damage (see
Table PV-1). If low branches will be kept, place the fence outside of the drip line. Where this is not
possible, place fencing as far away from the trunk as possible. In order to maintain a healthy tree, be
aware that about 60 percent of the tree's root zone extends beyond the drip line.
Table PV-1
Guidelines for Determining the Tree Protection Zone
(Source: Matheny and Clark, 1998; as cited in GreenCO and WWE 2008)
Distance from Trunk (ft) per inch of DBH
Species Tolerance to Damage Young Mature Over mature
Good 0.5' 0.75' 1.0'
Moderate 0.75' 1.0' 1.25'
Poor 1.0' 1.25' 1.5'
Notes: DBH = diameter at breast height (4.5 ft above grade); Young = <20% of
life expectancy; Mature = 20%-80% of life expectancy; Over mature =>80% of
life expectancy
Most tree roots grow within the top 12 to 18 inches of soil. Grade changes within the tree protection
zone should be avoided where possible because seemingly minor grade changes can either smother
1 Tree Protection guidelines adapted from GreenCO and WWE (2008). Green Industry Best Management Practices (BMPs) for
the Conservation and Protection of Water Resources in Colorado: Moving Toward Sustainability, Third Release. See
www.greenco.org for more detailed guidance on tree preservation.
Protection of Existing Vegetation (PV) SM-2
November 2010 Urban Drainage and Flood Control District PV-3
Urban Storm Drainage Criteria Manual Volume 3
roots (in fill situations) or damage roots (in cut situations). Consider small walls where needed to
avoid grade changes in the tree protection zone.
Place and maintain a layer of mulch 4 to 6-inch thick from the tree trunk to the fencing, keeping a
6-inch space between the mulch and the trunk. Mulch helps to preserve moisture and decrease soil
compaction if construction traffic is unavoidable. When planting operations are completed, the mulch
may be reused throughout planting areas.
Limit access, if needed at all, and appoint one route as the main entrance and exit to the tree
protection zone. Within the tree protection zone, do not allow any equipment to be stored, chemicals
to be dumped, or construction activities to take place except fine grading, irrigation system
installation, and planting operations. These activities should be conducted in consultation with a
landscaping professional, following Green Industry BMPs.
Be aware that soil compaction can cause extreme damage to tree health that may appear gradually
over a period of years. Soil compaction is easier to prevent than repair.
Maintenance and Removal
Repair or replace damaged or displaced fencing or other protective barriers around the vegetated area.
If damage occurs to a tree, consult an arborist for guidance on how to care for the tree. If a tree in a
designated preservation area is damaged beyond repair, remove and replace with a 2-inch diameter tree of
the same or similar species.
Construction equipment must not enter a wetland area, except as permitted by the U.S. Army Corps of
Engineers (USACE). Inadvertent placement of fill in a wetland is a 404 permit violation and will require
notification of the USACE.
If damage to vegetation occurs in a protected area, reseed the area with the same or similar species,
following the recommendations in the USDCM Revegetation chapter.
Construction Fence (CF) SM-3
November 2010 Urban Drainage and Flood Control District CF-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph CF-1. A construction fence helps delineate areas where
existing vegetation is being protected. Photo courtesy of Douglas
County.
Description
A construction fence restricts site access
to designated entrances and exits,
delineates construction site boundaries,
and keeps construction out of sensitive
areas such as natural areas to be
preserved as open space, wetlands and
riparian areas.
Appropriate Uses
A construction fence can be used to
delineate the site perimeter and locations
within the site where access is restricted
to protect natural resources such as
wetlands, waterbodies, trees, and other
natural areas of the site that should not be
disturbed.
If natural resource protection is an objective, then the construction fencing should be used in combination
with other perimeter control BMPs such as silt fence, sediment control logs or similar measures.
Design and Installation
Construction fencing may be chain link or plastic mesh and should be installed following manufacturer’s
recommendations. See Detail CF-1 for typical installations.
Do not place construction fencing in areas within work limits of machinery.
Maintenance and Removal
Inspect fences for damage; repair or replace as necessary.
Fencing should be tight and any areas with slumping or fallen posts should be reinstalled.
Fencing should be removed once construction is complete.
Construction Fence
Functions
Erosion Control No
Sediment Control No
Site/Material Management Yes
SM-3 Construction Fence (CF)
CF-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Construction Fence (CF) SM-3
November 2010 Urban Drainage and Flood Control District CF-3
Urban Storm Drainage Criteria Manual Volume 3
Vehicle Tracking Control (VTC) SM-4
November 2010 Urban Drainage and Flood Control District VTC-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph VTC-1. A vehicle tracking control pad constructed with
properly sized rock reduces off-site sediment tracking.
Description
Vehicle tracking controls provide
stabilized construction site access where
vehicles exit the site onto paved public
roads. An effective vehicle tracking
control helps remove sediment (mud or
dirt) from vehicles, reducing tracking onto
the paved surface.
Appropriate Uses
Implement a stabilized construction
entrance or vehicle tracking control where
frequent heavy vehicle traffic exits the
construction site onto a paved roadway. An
effective vehicle tracking control is
particularly important during the following conditions:
Wet weather periods when mud is easily tracked off site.
During dry weather periods where dust is a concern.
When poorly drained, clayey soils are present on site.
Although wheel washes are not required in designs of vehicle tracking controls, they may be needed at
particularly muddy sites.
Design and Installation
Construct the vehicle tracking control on a level surface. Where feasible, grade the tracking control
towards the construction site to reduce off-site runoff. Place signage, as needed, to direct construction
vehicles to the designated exit through the vehicle tracking control. There are several different types of
stabilized construction entrances including:
VTC-1. Aggregate Vehicle Tracking Control. This is a coarse-aggregate surfaced pad underlain by a
geotextile. This is the most common vehicle tracking control, and when properly maintained can be
effective at removing sediment from vehicle tires.
VTC-2. Vehicle Tracking Control with Construction Mat or Turf Reinforcement Mat. This type of
control may be appropriate for site access at very small construction sites with low traffic volume over
vegetated areas. Although this application does not typically remove sediment from vehicles, it helps
protect existing vegetation and provides a stabilized entrance.
Vehicle Tracking Control
Functions
Erosion Control Moderate
Sediment Control Yes
Site/Material Management Yes
SM-4 Vehicle Tracking Control (VTC)
VTC-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Photograph VTC-2. A vehicle tracking control pad with wheel wash
facility. Photo courtesy of Tom Gore.
VTC-3. Stabilized Construction Entrance/Exit with Wheel Wash. This is an aggregate pad, similar
to VTC-1, but includes equipment for tire washing. The wheel wash equipment may be as simple as
hand-held power washing equipment to more advance proprietary systems. When a wheel wash is
provided, it is important to direct wash water to a sediment trap prior to discharge from the site.
Vehicle tracking controls are sometimes installed in combination with a sediment trap to treat runoff.
Maintenance and Removal
Inspect the area for degradation and
replace aggregate or material used for a
stabilized entrance/exit as needed. If the
area becomes clogged and ponds water,
remove and dispose of excess sediment
or replace material with a fresh layer of
aggregate as necessary.
With aggregate vehicle tracking controls,
ensure rock and debris from this area do
not enter the public right-of-way.
Remove sediment that is tracked onto the
public right of way daily or more
frequently as needed. Excess sediment
in the roadway indicates that the
stabilized construction entrance needs
maintenance.
Ensure that drainage ditches at the
entrance/exit area remain clear.
A stabilized entrance should be removed only when there is no longer the potential for vehicle tracking to
occur. This is typically after the site has been stabilized.
When wheel wash equipment is used, be sure that the wash water is discharged to a sediment trap prior to
discharge. Also inspect channels conveying the water from the wash area to the sediment trap and
stabilize areas that may be eroding.
When a construction entrance/exit is removed, excess sediment from the aggregate should be removed
and disposed of appropriately. The entrance should be promptly stabilized with a permanent surface
following removal, typically by paving.
Vehicle Tracking Control (VTC) SM-4
November 2010 Urban Drainage and Flood Control District VTC-3
Urban Storm Drainage Criteria Manual Volume 3
SM-4 Vehicle Tracking Control (VTC)
VTC-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Vehicle Tracking Control (VTC) SM-4
November 2010 Urban Drainage and Flood Control District VTC-5
Urban Storm Drainage Criteria Manual Volume 3
SM-4 Vehicle Tracking Control (VTC)
VTC-6 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Stabilized Staging Area (SSA) SM-6
November 2010 Urban Drainage and Flood Control District SSA-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph SSA-1. Example of a staging area with a gravel surface to
prevent mud tracking and reduce runoff. Photo courtesy of Douglas
County.
Description
A stabilized staging area is a clearly
designated area where construction
equipment and vehicles, stockpiles, waste
bins, and other construction-related
materials are stored. The contractor
office trailer may also be located in this
area. Depending on the size of the
construction site, more than one staging
area may be necessary.
Appropriate Uses
Most construction sites will require a
staging area, which should be clearly
designated in SWMP drawings. The layout
of the staging area may vary depending on
the type of construction activity. Staging areas located in roadways due to space constraints require
special measures to avoid materials being washed into storm inlets.
Design and Installation
Stabilized staging areas should be completed prior to other construction activities beginning on the site.
Major components of a stabilized staging area include:
Appropriate space to contain storage and provide for loading/unloading operations, as well as parking
if necessary.
A stabilized surface, either paved or covered, with 3-inch diameter aggregate or larger.
Perimeter controls such as silt fence, sediment control logs, or other measures.
Construction fencing to prevent unauthorized access to construction materials.
Provisions for Good Housekeeping practices related to materials storage and disposal, as described in
the Good Housekeeping BMP Fact Sheet.
A stabilized construction entrance/exit, as described in the Vehicle Tracking Control BMP Fact Sheet,
to accommodate traffic associated with material delivery and waste disposal vehicles.
Over-sizing the stabilized staging area may result in disturbance of existing vegetation in excess of that
required for the project. This increases costs, as well as
requirements for long-term stabilization following the
construction period. When designing the stabilized staging area,
minimize the area of disturbance to the extent practical.
Stabilized Staging Area
Functions
Erosion Control Yes
Sediment Control Moderate
Site/Material
Yes
SM-6 Stabilized Staging Area (SSA)
SSA-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
See Detail SSA-1 for a typical stabilized staging area and SSA-2 for a stabilized staging area when
materials staging in roadways is required.
Maintenance and Removal
Maintenance of stabilized staging areas includes maintaining a stable surface cover of gravel, repairing
perimeter controls, and following good housekeeping practices.
When construction is complete, debris, unused stockpiles and materials should be recycled or properly
disposed. In some cases, this will require disposal of contaminated soil from equipment leaks in an
appropriate landfill. Staging areas should then be permanently stabilized with vegetation or other surface
cover planned for the development.
Minimizing Long-Term Stabilization Requirements
Utilize off-site parking and restrict vehicle access to the site.
Use construction mats in lieu of rock when staging is provided in an area that will not be disturbed
otherwise.
Consider use of a bermed contained area for materials and equipment that do not require a
stabilized surface.
Consider phasing of staging areas to avoid disturbance in an area that will not be otherwise
disturbed.
Stabilized Staging Area (SSA) SM-6
November 2010 Urban Drainage and Flood Control District SSA-3
Urban Storm Drainage Criteria Manual Volume 3
SM-6 Stabilized Staging Area (SSA)
SSA-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Street Sweeping and Vacuuming (SS) SM-7
November 2010 Urban Drainage and Flood Control District SS-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph SS-1. A street sweeper removes sediment and potential
pollutants along the curb line at a construction site. Photo courtesy of
Tom Gore.
Description
Street sweeping and vacuuming remove
sediment that has been tracked onto
roadways to reduce sediment transport
into storm drain systems or a surface
waterway.
Appropriate Uses
Use this practice at construction sites
where vehicles may track sediment
offsite onto paved roadways.
Design and Installation
Street sweeping or vacuuming should be
conducted when there is noticeable
sediment accumulation on roadways adjacent to the construction site. Typically, this will be concentrated
at the entrance/exit to the construction site. Well-maintained stabilized construction entrances, vehicle
tracking controls and tire wash facilities can help reduce the necessary frequency of street sweeping and
vacuuming.
On smaller construction sites, street sweeping can be conducted manually using a shovel and broom.
Never wash accumulated sediment on roadways into storm drains.
Maintenance and Removal
Inspect paved roads around the perimeter of the construction site on a daily basis and more
frequently, as needed. Remove accumulated sediment, as needed.
Following street sweeping, check inlet protection that may have been displaced during street
sweeping.
Inspect area to be swept for materials that may be hazardous prior to beginning sweeping operations.
Street Sweeping/ Vacuuming
Functions
Erosion Control No
Sediment Control Yes
Site/Material Management Yes
Paving and Grinding Operations (PGO) SM-12
November 2010 Urban Drainage and Flood Control District PGO-1
Urban Storm Drainage Criteria Manual Volume 3
Photograph PGO-1. Paving operations on a Colorado highway. Photo
courtesy of CDOT.
Description
Manage runoff from paving and grinding
operations to reduce pollutants entering
storm drainage systems and natural
drainageways.
Appropriate Uses
Use runoff management practices during
all paving and grinding operations such
as surfacing, resurfacing, and saw
cutting.
Design and Installation
There are a variety of management
strategies that can be used to manage runoff from paving and grinding operations:
Establish inlet protection for all inlets that could potentially receive runoff.
Schedule paving operations when dry weather is forecasted.
Keep spill kits onsite for equipment spills and keep drip pans onsite for stored equipment.
Install perimeter controls when asphalt material is used on embankments or shoulders near
waterways, drainages, or inlets.
Do not wash any paved surface into receiving storm drain inlets or natural drainageways. Instead,
loose material should be swept or vacuumed following paving and grinding operations.
Store materials away from drainages or waterways.
Recycle asphalt and pavement material when feasible. Material that cannot be recycled must be
disposed of in accordance with applicable regulations.
See BMP Fact Sheets for Inlet Protection, Silt Fence and other perimeter controls selected for use during
paving and grinding operations.
Maintenance and Removal
Perform maintenance and removal of inlet protection and perimeter controls in accordance with their
respective fact sheets.
Promptly respond to spills in accordance with the spill
prevention and control plan.
Paving and Grinding Operations
Functions
Erosion Control No
Sediment Control No
Site/Material Management Yes
APPENDIX C
LANDSCAPE PLAN
APPENDIX D
COPIES OF PERMITS/APPLICATIONS
For Agency Use Only
Permit Number Assigned
COR03-
Date Received /_ /_
Month Day Year
COLORADO DISCHARGE PERMIT SYSTEM (CDPS)
STORMWATER DISCHARGE ASSOCIATED WITH CONSTRUCTION ACTIVITIES APPLICATION
PHOTO COPIES, FAXED COPIES, PDF COPIES OR EMAILS WILL NOT BE ACCEPTED.
Please print or type. Original signatures are required. All items must be completed accurately and in their entirety for
the application to be deemed complete. Incomplete applications will not be processed until all information is received
which will ultimately delay the issuance of a permit. If more space is required to answer any question, please attach
additional sheets to the application form. Applications must be submitted by mail or hand delivered to:
Colorado Department of Public Health and Environment
Water Quality Control Division
4300 Cherry Creek Drive South
WQCD-P-B2
Denver, Colorado 80246-1530
Any additional information that you would like the Division to consider in developing the permit should be provided with
the application. Examples include effluent data and/or modeling and planned pollutant removal strategies.
PERMIT INFORMATION
Reason for Application: NEW CERT
RENEW CERT EXISTING CERT #
Applicant is: Property Owner Contractor/Operator
A. CONTACT INFORMATION - NOT ALL CONTACT TYPES MAY APPLY * indicates required
*PERMITTEE (If more than one please add additional pages)
*ORGANIZATION FORMAL NAME:
1) *PERMITTEE the person authorized to sign and certify the permit application. This person receives all
permit correspondences and is legally responsible for compliance with the permit.
Responsible Position (Title):
Currently Held By (Person):
Telephone No:_
email address
Organization:
Mailing Address:
City:_ State: Zip:
This form must be signed by the Permittee (listed in item 1) to be considered complete.
Per Regulation 61 In all cases, it shall be signed as follows:
a) In the case of corporations, by a responsible corporate officer. For the purposes of this section, the responsible
corporate officer is responsible for the overall operation of the facility from which the discharge described in the
application originates.
b) In the case of a partnership, by a general partner.
c) In the case of a sole proprietorship, by the proprietor.
d) In the case of a municipal, state, or other public facility, by either a principal executive officer or ranking elected official
page 1 of 5 revised April 2011
2) DMR COGNIZANT OFFICIAL (i.e. authorized agent) the person or position authorized to sign and certify reports required
by the Division including Discharge Monitoring Reports *DMR’s, Annual Reports, Compliance Schedule submittals,
and other information requested by the Division. The Division will transmit pre-printed reports (ie. DMR’s) to this person.
If more than one, please add additional pages. Same As 1) Permittee
Responsible Position (Title):
Currently Held By (Person):
Telephone No:_
email address
Organization:
Mailing Address:
City:_ State: Zip:
Per Regulation 61 : All reports required by permits, and other information requested by the Division shall be signed by
the permittee or by a duly authorized representative of that person. A person is a duly authorized representative only if:
(i) The authorization is made in writing by the permittee
(ii) The authorization specifies either an individual or a position having responsibility for the overall operation of the
regulated facility or activity such as the position of plant manager, operator of a well or a well field, superintendent,
position of equivalent responsibility, or an individual or position having overall responsibility for environmental matters
for the company. (A duly authorized representative may thus be either a named individual or any individual occupying a
named position); and
(iii) The written authorization is submitted to the Division
3) *SITE CONTACT local contact for questions relating to the facility & discharge authorized by this permit
for the facility.
Same As 1) Permittee
Responsible Position (Title):
Currently Held By (Person):
Telephone No:_
email address
Organization:
Mailing Address:
City:_ State: Zip:
4) * BILLING CONTACT if different than the permittee
Responsible Position (Title):
Currently Held By (Person):
Telephone No:_
email address
Organization:
Mailing Address:
City:_ State: Zip:
Page 2 of 5 revised April 2011
5) OTHER CONTACT TYPES (check below) Add pages if necessary:
ResponsiblePosition (Title):
Currently Held By (Person):
Telephone No:_
email address
Organization:
Mailing Address:
City:_ State: Zip:
o Pretreatment
Coordinator
o Environmental Contact
o Biosolids Responsible
Party
o Property Owner
Inspection Facility Contact
Consultant
Compliance Contact
Stormwater MS4 Responsible
Person
Stormwater Authorized
Representative
Other
B. Permitted Project/Facility Information
Project/Facility Name
Street Address or cross streets
(e.g., “S. of Park St. between 5th Ave. and 10th Ave.”, or “W. side of C.R. 21, 3.25 miles N. of Hwy 10”; A street name without an address,
intersection, mile marker, or other identifying information describing the location of the project is not adequate. For linear projects,
the route of the project should be described as best as possible with the location more accurately indicated by a map.)
City, Zip Code County
Facility Latitude/Longitude— (approximate center of site to nearest 15 seconds using one of
following formats
001A Latitude . Longitude . (e.g., 39.703°, 104.933°’)
degrees (to 3 decimal places) degrees (to 3 decimal places)
or
001A Latitude º ’ " Longitude º ’ " (e.g., 39°46'11"N, 104°53'11"W)
degrees minutes seconds degrees minutes seconds
For the approximate center point of the property, to the nearest 15 seconds. The latitude and longitude must be provided as
either degrees, minutes, and seconds, or in decimal degrees with three decimal places. This information may be obtained from
a variety of sources, including:
o Surveyors or engineers for the project should have, or be able to calculate, this information.
o EPA maintains a web-based siting tool as part of their Toxic Release Inventory program that uses interactive maps and
aerial photography to help users get latitude and longitude. The siting tool can be accessed at
www.epa.gov/tri/report/siting_tool/index.htm
o U.S. Geological Survey topographical map(s), available at area map stores.
o Using a Global Positioning System (GPS) unit to obtain a direct reading.
Note: the latitude/longitude required above is not the directional degrees, minutes, and seconds provided on a site legal
description to define property boundaries.
C. MAP (Attachment) If no map is submitted, the permit will not be issued.
Map: Attach a map that indicates the site location and that CLEARLY shows the boundaries of the area that will be
disturbed. Maps must be no larger than 11x17 inches.
D. LEGAL DESCRIPTION
Legal description: If subdivided, provide the legal description below, or indicate that it is not applicable (do not supply
Township/Range/Section or metes and bounds description of site)
Subdivision(s): Lot(s): Block(s):
OR
Not applicable (site has not been subdivided)
page 3 of 5 revised April 2011
E. AREA OF CONSTRUCTION SITE
Total area of project site (acres): Area of project site to undergo disturbance (acres):
Note: aside from clearing, grading and excavation activities, disturbed areas also include areas receiving
overburden (e.g., stockpiles), demolition areas, and areas with heavy equipment/vehicle traffic and storage
that disturb existing vegetative cover
Total disturbed area of Larger Common Plan of Development or Sale, if applicable:
(i.e., total, including all phases, filings, lots, and infrastructure not covered by this application)
Provide both the total area of the construction site, and the area that will undergo disturbance, in acres. Note: aside
from clearing, grading and excavation activities, disturbed areas also include areas receiving overburden (e.g.,
stockpiles), demolition areas, and areas with heavy equipment/vehicle traffic and storage that disturb existing
vegetative cover (see construction activity description under the APPLICABILITY section on page 1).
If the project is part of a larger common plan of development or sale (see the definition under the APPLICABILITY
section on page 1), the disturbed area of the total plan must also be included.
F. NATURE OF CONSTRUCTION ACTIVITY
Check the appropriate box(s) or provide a brief description that indicates the general nature of the construction activities.
(The full description of activities must be included in the Stormwater Management Plan.)
Single Family Residential Development
Multi-Family Residential Development
Commercial Development
Oil and Gas Production and/or Exploration (including pad sites and associated infrastructure)
Highway/Road Development (not including roadways associated with commercial or residential development)
Other – Description:
G. ANTICIPATED CONSTRUCTION SCHEDULE
Construction Start Date: ___________________________ Final Stabilization Date: _____________________________
Construction Start Date - This is the day you expect to begin ground disturbing activities, including grubbing, stockpiling, excavating,
demolition, and grading activities.
Final Stabilization Date - in terms of permit coverage, this is when the site is finally stabilized. This means that all ground surface
disturbing activities at the site have been completed, and all disturbed areas have been either built on, paved, or a uniform vegetative
cover has been established with an individual plant density of at least 70 percent of pre-disturbance levels. Permit coverage must be
maintained until the site is finally stabilized. Even if you are only doing one part of the project, the estimated final stabilization
date must be for the overall project. If permit coverage is still required once your part is completed, the permit certification may be
transferred or reassigned to a new responsible entity(s).
H. RECEIVING WATERS (If discharge is to a ditch or storm sewer, include the name of the ultimate receiving waters)
Immediate Receiving Water(s):
Ultimate Receiving Water(s):
Identify the receiving water of the stormwater from your site. Receiving waters are any waters of the State of Colorado. This includes
all water courses, even if they are usually dry. If stormwater from the construction site enters a ditch or storm sewer system, identify
that system and indicate the ultimate receiving water for the ditch or storm sewer. Note: a stormwater discharge permit does not
allow a discharge into a ditch or storm sewer system without the approval of the owner/operator of that system.
page 4 of 5 revised April 2011
I. REQUIRED SIGNATURES (Both parts i. and ii. must be signed)
Signature of Applicant: The applicant must be either the owner and/or operator of the construction site. Refer to Part B of the instructions for additional information.
The application must be signed by the applicant to be considered complete. In all cases, it shall be signed as follows: (Regulation 61.4 (1ei)
a) In the case of corporations, by the responsible corporate officer is responsible for the overall operation of the facility from which the discharge
described in the form originates
b) In the case of a partnership, by a general partner.
c) In the case of a sole proprietorship, by the proprietor.
d) In the case of a municipal, state, or other public facility, by either a principal executive officer, ranking elected official, (a principal executive officer
has responsibility for the overall operation of the facility from which the discharge originates).
STOP!: A Stormwater Management Plan must be completed prior to signing the following certifications!
i. STORMWATER MANAGEMENT PLAN CERTIFICATION
“I certify under penalty of law that a complete Stormwater Management Plan, has been prepared for my activity. Based on my inquiry of the person or
persons who manage the system, or those persons directly responsible for gathering the information, the Stormwater Management Plan is, to the best of
my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for falsely certifying the completion of said SWMP,
including the possibility of fine and imprisonment for knowing violations.”
XX
Signature of Legally Responsible Person or Authorized Agent (submission must include original signature) Date Signed
Name (printed) Title
ii. SIGNATURE OF PERMIT LEGAL CONTACT
"I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system
designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons
who manage the system, or those persons directly responsible for gathering the information, the information submitted is to the best of my
knowledge and belief, true, accurate and complete. I am aware that there are significant penalties for submitting false information, including the
possibility of fine and imprisonment for knowing violations."
“I understand that submittal of this application is for coverage under the State of Colorado General Permit for Stormwater Discharges Associated with
Construction Activity for the entirety of the construction site/project described and applied for, until such time as the application is amended or the
certification is transferred, inactivated, or expired.”
XX
Signature of Legally Responsible Person (submission must include original signature) Date Signed
Name (printed Title
DO NOT INCLUDE A COPY OF THE STORMWATER MANAGEMENT PLAN
DO NOT INCLUDE PAYMENT – AN INVOICE WILL BE SENT AFTER THE CERTIFICATION IS ISSUED.
page 5 of 5 revised April 2011
COLORADO DISCHARGE PERMIT SYSTEM (CDPS)
For Agency Use Only
Permit Number Assigned
COG07-______________
Date Received ____/____/____
Month Day Year
CONSTRUCTION DEWATERING INDUSTRIAL WASTEWATER DISCHARGE APPLICATION
PHOTO COPIES, FAXED COPIES, PDF COPIES OR EMAILS WILL NOT BE ACCEPTED.
Please print or type. Original signatures are required. All items must be completed accurately and in their entirety
for the application to be deemed complete. Incomplete applications will not be processed until all information is received
which will ultimately delay the issuance of a permit. If more space is required to answer any question, please attach
additional sheets to the application form. Applications must be submitted by mail or hand delivered to:
Colorado Department of Public Health and Environment
Water Quality Control Division
4300 Cherry Creek Drive South
WQCD-P-B2
Denver, Colorado 80246-1530
Any additional information that you would like the Division to consider in developing the permit should be provided with
the application. Examples include effluent data and/or modeling and planned pollutant removal strategies.
PERMIT INFORMATION
Reason for Application: NEW CERT
RENEW CERT EXISTING CERT #____________________
Applicant is: Property Owner Contractor/Operator
A. Contact Information
Permittee (If more than one please add additional pages)
Organization Formal Name: ___________________________________________________________
1. Permittee the person authorized to sign and certify the permit application. This person receives all permit
correspondences and is legally responsible for compliance with the permit.
Responsible Position (Title): ______________________________________________________________
Currently Held By (Person): _______________________________________________________________
Telephone No:__________________________________________________________________________
email address__________________________________________________________________________
Organization: ___________________________________________________________________________
Mailing Address: ________________________________________________________________________
City:_______________________________ State: ______________________ Zip: ____________________
This form must be signed by the Permittee to be considered complete.
Per Regulation 61: In all cases the permit application shall be signed as follows:
a) In the case of corporations, by a responsible corporate officer. For the purposes of this section, the
responsible corporate officer is responsible for the overall operation of the facility from which the discharge
described in the application originates.
b) In the case of a partnership, by a general partner.
c) In the case of a sole proprietorship, by the proprietor.
d) In the case of a municipal, state, or other public facility, by either a principal executive officer or ranking
elected official
Page 1 of 6 Revised April 2011
Industrial Wastewater Discharge Permit – Construction Dewatering www.coloradowaterpermits.com
2. DMR Cognizant Official (i.e. authorized agent)—the person or position authorized to sign and certify reports
required by permits including Discharge Monitoring Reports [DMR’s], Annual Reports, Compliance Schedule
submittals, and other information requested by the Division. The Division will send pre-printed reports (e.g. DMR’s) to
this person. If more than one, please add additional pages. Same as 1) Permittee
Responsible Position (Title): _______________________________________________________
Currently Held By (Person): ________________________________________________________
Telephone No:___________________________________________________________________
Email address____________________________________________________________________
Organization: ____________________________________________________________________
Mailing Address: _________________________________________________________________
City:______________________________ State: ______________ Zip: ______________________
Per Regulation 61: All reports required by permits, and other information requested by the Division shall be
signed by the permittee or by a duly authorized representative of that person. A person is a duly authorized
representative only if:
(i) The authorization is made in writing by the permittee;
(ii) The authorization specifies either an individual or a position having responsibility for the overall operation of
the regulated facility or activity such as the position of plant manager, operator of a well or a well field,
superintendent, position of equivalent responsibility, or an individual or position having overall responsibility for
environmental matters for the company. (A duly authorized representative may thus be either a named
individual or any individual occupying a named position); and
(iii) The written authorization is submitted to the Division.
3. Site/Local Contact—contact for questions regarding the facility & discharges authorized by this permit
Same as Permittee—Item 1
Responsible Position (Title): ________________________________________________________
Currently Held By (Person): _________________________________________________________
Telephone No:____________________________________________________________________
Email address_____________________________________________________________________
Organization: _____________________________________________________________________
Mailing Address: __________________________________________________________________
City:______________________________ State: ______________ Zip: _______________________
4. Operator in Responsible Charge Same as Permittee—Item 1
Responsible Position (Title): __________________________________________________________
Currently Held By (Person): ___________________________________________________________
Telephone No:______________________________________________________________________
Email address______________________________________________________________________
Organization: _______________________________________________________________________
Mailing Address: ____________________________________________________________________
City:_______________________________ State: ______________ Zip: ________________________
Certification Type____________________Certification Number________________________________
Page 2 of 6 Revised April 2011
Industrial Wastewater Discharge Permit – Construction Dewatering www.coloradowaterpermits.com
5. Billing Contact (if different than the permittee)
Responsible Position (Title): _____________________________________________________________
Currently Held By (Person): ______________________________________________________________
Telephone No:_________________________________________________________________________
Email address_________________________________________________________________________
Organization: __________________________________________________________________________
Mailing Address: _______________________________________________________________________
City:______________________________ State: ______________ Zip: ____________________________
6. Other Contact Types (check below) Add pages if necessary:
Responsible Position (Title): ______________________________________________________________
Currently Held By (Person): _______________________________________________________________
Telephone No:__________________________________________________________________________
Email address__________________________________________________________________________
Organization: ___________________________________________________________________________
Mailing Address: ________________________________________________________________________
City:______________________________________ State: ______________ Zip: _____________________
Pretreatment Coordinator
Environmental Contact
Biosolids Responsible Party
Property Owner
Inspection Facility Contact
Consultant
Compliance Contact
Stormwater MS4 Responsible
Person
Stormwater Authorized
Representative
Other ____________________
B. Permitted Project/Facility Information
1. Project/Facility Name ____________________________________________________________________________
Street Address or cross streets_____________________________________________________________________
City, State and Zip Code _____________________________________________County _____________________
Type of Facility Ownership
City Government Corporation Private Municipal or Water District
State Government Mixed Ownership _________________________________
2. Facility Latitude/Longitude—List the latitude and longitude of the excavation(s) resulting in the discharge(s). If the exact excavation
location(s) are not known, list the latitude and longitude of the center point of the construction project. If using the center point, be
sure to specify that it is the center point of construction activity.
001A Latitude __________ . _________ Longitude ___________ . _____________ (e.g., 39.703°, 104.933°’)
degrees (to 3 decimal places) degrees (to 3 decimal places)
or
001A Latitude _____ º _____’ _____" Longitude _____ º _____’ _____" (e.g., 39°46'11"N, 104°53'11"W)
degrees minutes seconds degrees minutes seconds
Horizontal Collection Method: GPS Unspecified Interpolation Map – Map Scale Number__________
Reference Point: Project/Facility Entrance Project/Facility Center/Centroid
Horizontal Accuracy Measure (WQCD Requires use of NAD83 Datum for all references)___________________
(add additional pages if necessary)
Page 3 of 6 Revised April 2011
Industrial Wastewater Discharge Permit – Construction Dewatering www.coloradowaterpermits.com
B. Permitted Project/Facility Information Continued…
3. Facility Activity and Anticipated Schedule
Dewatering will begin (date) _______________
Estimate how long dewatering will last: Years____________Months_______________Days_________________
Describe Activity e.g., highway bridge and tunnel construction, storm drain expansion, etc. and a description of activities
being performed, including construction schedule and months of operation. Specify source(s) of wastewater to be discharged
(i.e.well, foundation excavation, trenching, etc).
4. Will the discharge go to a ditch or storm sewer? YES NO
If YES, in the appropriate table below include the name of the ultimate receiving waters where the ditch or storm sewer
discharges.
If YES, applicant must contact the owner of the ditch or storm sewer system (prior to discharging) to verify local ordinances
and to determine whether or not additional requirements are going to be imposed by the owner.
5. What type of discharge will this be? Defined Discharge Undefined Discharge
A Defined Discharge is a discharge where the dewatering discharge locations and number of outfalls are known at the time of permit
application.
If discharge is Defined – enter information in table C for Defined Discharges
An Undefined Discharge is a discharge where the exact dewatering discharge locations are unknown at the time of permit application.
The permit applicant must request the maximum number of potential outfalls (discharges) for the permitted facility.
If discharge is Undefined – enter information in table D for Undefined Discharges
Note: For undefined discharges, the site specific sampling and monitoring parameters will be selected based on the potential
pollutant sources found within the entire permitted project area and will be applied to all outfall(s). The most stringent of the
surface water limitations for each identified site specific parameter will be applied to each permitted outfall.
C. Information for Defined Discharge Location(s):
1. In the following table, include the following information for the discharge:
Include the number of discharge points (outfalls);
Include the name of the receiving stream for each Outfall Number. If the discharge is to groundwater fill out discharge
information located next to G001A, G002A, etc.—Please review the Division’s Low Risk Discharge Guidance for
Discharges of Uncontaminated Groundwater to Land to determine if discharges to groundwater can be allowed under
the Guidance in lieu of obtaining a Construction Dewatering Permit.;
Include the approximate location of the discharge (e.g. ―discharge will occur between 5th Avenue and 20th Avenue‖, or ―the
discharge will enter the storm sewer located at the corner of Speer Blvd and 8th Ave., which eventually flows to Cherry Creek‖ ;
Include the maximum anticipated flow rate of the discharge; this can be based on pump capacity or other applicable measure.
OUTFALL
NUMBER
RECEIVING
STREAM(S)
APPROXIMATE LOCATION OF
DISCHARGE
MAXIMUM
FLOW RATE
LATITUDE/LONGITUDE
OF EACH DISCHARGE
OUTFALL
001A
002A
OUTFALL
NUMBER
GROUNDWATER APPROXIMATE LOCATION OF
DISCHARGE
MAXIMUM
FLOW RATE
LATITUDE/LONGITUDE
OF EACH DISCHARGE
OUTFALL
G001A
G002A
Add more pages if necessary
Page 4 of 6 Revised April 2011
Industrial Wastewater Discharge Permit – Construction Dewatering www.coloradowaterpermits.com
D. Information for Undefined Discharge Location(s):
1. In the following table include the following information for the discharge:
Include the maximum number of potential outfalls (discharges) for the permitted facility/project;
Include the maximum anticipated flow rate of the discharge; this can be based on pump capacity or other applicable measure;
Include the name of all potential receiving streams for the entire project. If the discharge is to groundwater fill out discharge
information located next to G001A, G002A, etc.—Please review the Division’s Low Risk Discharge Guidance for
Discharges of Uncontaminated Groundwater to Land to determine if discharges to groundwater can be allowed under
the Guidance in lieu of obtaining a Construction Dewatering Permit.
Note: For undefined discharges, the site specific sampling and monitoring parameters will be selected based on the potential
pollutant sources found within the entire permitted project area and will be applied to all outfall(s). The most stringent of the surface
water limitations for each identified site specific parameter will be applied to each permitted outfall.
OUTFALL
NUMBER
MAXIMUM FLOW
RATE (GPM) POTENTIAL RECEIVING STREAM(S)
001A
002A
OUTFALL
NUMBER
MAXIMUM FLOW
RATE (GPM)
GROUNDWATER
G001A
GROUNDWATER
G002A
Add more pages if necessary
Sampling and Reporting Requirements for Defined and Undefined Discharges: Sampling must occur at every end-of-
pipe dewatering location (after going through your choice of BMP, if necessary). The permittee will be issued Discharge
Monitoring Report (DMR) forms for all requested outfall numbers. The permittee will be required to submit the DMR forms
for each requested outfall number monthly. For the outfall numbers(s) where no discharge occurred for a given month, the
permittee shall mark ―No Discharge‖ on the DMR forms. The sampling results must be maintained by the permittee.
E. A Location Map for Defined and Undefined Discharges—designating the location of the project/facility, the location of the
discharge point(s)/outfalls—applicable only to defined discharges, and the receiving water(s) listed in Items C & D. A north
arrow shall be shown. This map must be on paper that can be folded to 8 ½ x 11 inches.
F. A Legible Sketch of the Site
1. For Defined Discharges—A legible site sketch shall be submitted and must include: the location of the end of pipe
dewatering discharges at the site (e.g. where the flow will be discharged from the pump or BMP), the BMP(s) that will be
used to treat the discharge(s), and the sampling location(s). Refer to the instructions for additional guidance specific to
sites with multiple potential dewatering locations. This map must be on paper that can be folded to 8 ½ x 11 inches.
OR
2. For Undefined Discharges—A legible site sketch shall be submitted and must include: the limits of the construction site
boundary to include street names (if applicable) or landmarks; description of the BMPs to be implemented; and location of
all potential receiving waters. This map must be on paper that can be folded to 8 ½ x 11 inches.
G. Potential Groundwater Contamination
1. Is this operation located within one mile of a landfill, abandoned landfill or any mine or mill tailings? YES NO
2. Has the dewatering discharge been analyzed for any parameters (pH, Oil and Grease, Metals, Organics, etc.)?
YES NO If YES, please attach a copy of the sampling results.
Page 5 of 6 Revised April 2011
Industrial Wastewater Discharge Permit – Construction Dewatering www.coloradowaterpermits.com
Note to the applicant: Upon review of the application, the Division may request characterization of the water to be
discharged or analysis of certain parameters once the application has been reviewed. If the Division requests a
representative analysis of the water to be discharged, the application processing time may be lengthened.
3. Has the dewatering area been checked for possible groundwater contamination, such as plumes from leaking
underground storage tanks, mine tailings,etc –or- has a Phase I or Phase II been conducted on the site?
YES NO
If YES, show location of the landfill, tailings, or possible groundwater contamination on the location map or general sketch
map. (Explain the location, extent of contamination, and possible effect on the groundwater pumping from this facility). Or
include a copy of the phase I or Phase II report. If the reports are not available, submit a summary of the results of the
report. If any sampling results are available, please attach a copy of all data.
Note: Contact Water Quality Control Division for the proper water chemistry parameters to report.
H. Additional Information
1. Does the applicant have a Stormwater Permit for Construction Activities? YES NO PENDING
If Yes, Stormwater Construction Permit Number _________________________________
WATER RIGHTS
The State Engineers Office (SEO) has indicated that any discharge that does not return water directly to surface
waters (i.e.land application, rapid infiltration basins, etc.) has the potential for material injury to a water right. As a
result, the SEO needs to determine that material injury to a water right will not occur from such activities. To make
this judgment, the SEO requests that a copy of all documentation demonstrating that the requirements of Colorado
water law have been met, be submitted to their office for review. The submittal should be made as soon as possible
to the following address:
Colorado Division of Water Resources
1313 Sherman Street, Room 818
Denver, Colorado 80203
Should there be any questions on the issue of water rights, the SEO can be contacted at (303) 866-3581. It is
important to understand that any CDPS permit issued by the Division does not constitute a water right. The issuance
of a CDPS permit does not negate the need to also have the necessary water rights in place. Additionally, if the
activity has an existing CDPS permit, there is no guarantee that the proper water rights are in place.
I. Required Certification Signature [Reg 61.4(1)(h)]
"I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in
accordance with a system designed to assure that qualified personnel properly gather and evaluate the information
submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for
gathering the information, the information submitted is to the best of my knowledge and belief, true, accurate and
complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine
and imprisonment for knowing violations."
―I understand that submittal of this application is for coverage under the State of Colorado General Permit for Discharges
Associated with Construction Dewatering for the entirety of the construction site/project described and applied for,
until such time as the application is amended or the certification is transferred, inactivated, or expired.‖
Signature (Legally Responsible Party)_________________________________________Date ________________
Name (printed) _____________________________________________Title______________________________
Page 6 of 6 Revised April 2011
Industrial Wastewater Discharge Permit – Construction Dewatering www.coloradowaterpermits.com
Construction Dewatering Application Instructions
Item A- Contact Information
Permit Applicant: Provide the company, corporation, or organization name
1. Permittee—Identify the title and name of the individual who is the legally responsible for the permit. The requirement of
who can be listed as the legally responsible party is included in the permit application. Include all requested information such
as the legal party‘s phone number, email address and mailing address. The individual identified here must sign the permit
application—Part I.
2. DMR Cognizant Official—Identify the title and individual‘s name
3. Site Contact—Identify the title and name of individual who is familiar with the day to day operations of the site. This
person will have first-hand information regarding the construction site, discharges occurring on site, and implementation of
BMPs.
4. Operator in Responsible Charge— Identify the title and individual‘s name if there is an Operator in Charge (Not
required)
5. Billing Contact— Identify the title and individual‘s name
6. Other Contacts – Identify the title and individual‘s name for any of the listed descriptions (Not required)
Item B – Permitted Project/Facility Information
1. Name of the project/facility and location; include the name of the project/facility and include a description of the location
of the project/facility. The location may be a physical address or if the exact address is not available you may use an
approximate address such as: the nearest intersection or boundary streets including directional identifiers (e.g., ―South of 14th
Avenue between Sherman St. and Logan St.‖, or ―West side of C.R. 21, 3.25 miles North of Hwy 10‖) or other identifying
information. A street name without an address, intersection, mile marker or other identifying information is not adequate.
2. Latitude/Longitude: For each excavation resulting in a discharge/outfall provide the Latitude/Longitude of the excavation.
If the exact location of the disturbance resulting in discharge is not known, provide the lat/long of the center point of the
construction activity. If identifying the center point of construction activity, make sure to write in ―center point‘ next to
lat/long. The lat/long may be provided as decimal degrees or degrees, minutes, seconds format. This information can be
obtained from a variety of sources, including:
Various Websites: http://terraserver.microsoft.com, http://geocoder.us/, or
www.epa.gov/tri/reports/siting_tool/index.htm
U.S Geological Survey topographical map, available at area map stores
Surveyors or engineers for the construction project should have, or be able to calculate this information using a
Global Positioning System (GPS) unit
Specify whether the Latitude/Longitude information was collected either by using a GPS unit or through Map interpolation.
3. Facility Activity and Schedule: Include the anticipated start date of construction dewatering and provide the length of
time dewatering is anticipated to last. Provide a description of the general nature of the construction activities that are
requiring the dewatering. Also describe if the dewatering discharge is from an open excavation, such as a trench or foundation,
or from groundwater lowering wells. Examples of activity descriptions may include: ‗open trench excavation for installation
of 4,000 linear feet of new water lines‘, or ‗a series of shallow groundwater wells will be installed around the perimeter of the
construction site in order to lower the water table for construction of a new 5,000 square foot music shop—all wells will be
piped to one manifold resulting in one discharge location as indicated on our site sketch.
4. Discharges to ditches and storm sewers: Indicate by checking yes or no whether or not the immediate effluent will be
discharged to a ditch or storm sewer. If yes is marked, the applicant must contact the owner of the ditch or storm sewer
system prior to discharge to verify if the owner will allow a discharge to their system. The owner of the ditch/storm sewer
system may impose additional requirements. Storm drainage systems are typically owned by the city or county they are located
within, and therefore contacting the local city/county is the appropriate place to start. If yes is marked, in Table C or Table D
be sure to include the location of the system and the ultimate receiving waters.
5. Defined or Undefined Discharge: Identify whether the applicant is applying for a Defined or Undefined discharge.
A Defined Discharge is a discharge where the dewatering discharge locations are known at the time of permit application.
If discharge is Defined – enter discharge information in Table C
Page 1 of 3—Revised April 2011
Industrial Wastewater Discharge Permit – Construction Dewatering www.coloradowaterpermits.com
An Undefined Discharge is a discharge where the exact dewatering discharge locations are unknown at the time of permit
application. The permit applicant must request the maximum number of potential outfalls (discharges) for the permitted
facility/project. If discharge is Undefined – enter discharge information in Table D. The applicant must identify all
potential receiving streams for the entire project.
If the applicant is requesting undefined discharges, the site specific sampling and monitoring parameters will be selected
based on the potential pollutant sources found within the entire permitted project area and will be applied to all outfall(s).
The most stringent of the surface water limitations for each identified site specific parameter will be applied to each
permitted outfall. For example, if the undefined project includes installation of 8 miles of linear pipeline and leaking
underground storage tanks are expected to present in one section of the project, sampling and monitoring for Benzene,
Toluene, Ethyl benzene, and Xylenes will be required for all requested outfall(s).
Item C- Information for Defined Discharge Location(s).
1. If Defined Discharge was marked in Section B.5 fill out Table C. Table C requires the following information:
Number of discharge(s) (outfalls)—Identify the number of outfalls requested in Table C, this includes
discharges to surface water and groundwater. If there are more than two requested discharges to surface water,
attach a separate piece of paper including all requested information.
Name of the receiving water(s)—If the discharge is to a ditch, identify the ditch and the ultimate receiving
water(s). Receiving waters are any waters of the state of Colorado, even if the natural drainage is usually dry. If
discharge is to groundwater, then fill out the appropriate information within Table C next to G001A, G001A. If
there are more than two discharges to groundwater, attach a separate piece of paper including all requested
information. If the applicant is requesting a discharge to groundwater, please review the Division‘s Low Risk
Discharge Guidance for Discharges of Uncontaminated Groundwater to Land.
http://www.cdphe.state.co.us/wq/PermitsUnit/policyguidancefactsheets/policyandguidance/lowriskgwdischargeto
land.pdf
Discharges performed in accordance with the Guidance for Discharges of Uncontaminated Groundwater to Land
do not require a separate construction dewatering permit.
Narrative description of the approximate location of the discharge—Include a narrative description of the
discharge path. For example, ―the dewatering discharge will enter the storm sewer located at 6th Avenue and
Sheridan which flows to Bear Creek‖ or ―the dewatering will discharge to a field located at 66
th
and Farmers
Road with potential to runoff to Sanders Creek‖. If there is more than one known discharge, include this
descriptive information for all known discharges.
Maximum anticipated flow rate of the discharge (in gallons per minute)—Do not leave this section blank.
Include the maximum flow rate. You may estimate the flow contribution based on pump capacity if data is not
available.
Latitude/Longitude of each discharge location—Include the latitude/longitude of each discharge location. See
the instructions B.2 for information on how to obtain latitude/longitude information.
Item D- Information for Undefined Discharge Location(s).
1. If Undefined Discharge was marked in Section B.5 fill out Table D. Table D requires the flowing information:
Maximum number of potential outfalls (discharges) for the permitted facility—The applicant must identify the
maximum number of discharge locations (outfalls) for the entire construction project. If more than 5 outfalls are
requested, attach a separate piece of paper. DMRs will be sent to the permittee for each requested outfall.
Maximum anticipated flow rate of the discharge (in gallons per minute)—Do not leave this section blank. The
flow rate may be estimated based on pump capacity if data is not available.
Name(s) of the all potential receiving stream(s)—Identify all potential receiving streams for the entire project.
If the discharge is to groundwater then fill out the information in Table D next to G001A, G002A, etc.
Page 2 of 3 Revised April 2011
Industrial Wastewater Discharge Permit – Construction Dewatering www.coloradowaterpermits.com
Item E – Location Map—A location map is required to be submitted with all applications for both defined and undefined
discharges. The location map must include the location of the project/facility, the approximate location of each defined discharge
points, and the identified receiving water(s) listed in Items C or D. The map must have a minimum scale of 1:24000 (the scale of a
USGS 7.5 minute map). A legible submittal is required on paper that can be folded to8 ½ by 11 inches.
Item F- Detailed Sketch of the Site—If a defined discharge is requested please submit a detailed site sketch which includes
the information requested in F.1. If an undefined discharge is requested please submit a detailed site sketch which includes
the information requested in F.2.
1. Detailed Sketch of the Site for Defined Discharges—Must included a detailed sketch of the site showing the location of
end of pipe dewatering discharge(s) at the site—to include the flow line of each requested dewatering discharge. The
location and identification of the structural Best Management Practices (BMPs) used to treat the effluent prior to discharge.
The map shall also include the sampling locations for each requested outfall. A legible submittal is required on paper that
can be folded to 8 ½ by 11 inches.
2. Detailed Sketch of the Site for Undefined Discharges—This map must include the boundary of the construction site
where all potential dewatering could occur. The boundaries should include a northern boundary, an eastern boundary, a
southern boundary and a western boundary. The map must highlight or call out street names that border the project
boundary. If streets are not available, landmarks or mile-markers must be identified. The map must highlight all potential
receiving streams. The map must also include the identification of the structural BMPs used to treat the effluent prior to
discharge. A legible submittal is required on paper that can be folded to 8 ½ by 11 inches.
Item G—Potential Groundwater Contamination
1. Dewatering on/near Landfills, Mines, or Mill Tailings: If the dewatering project is located within one mile of a landfill,
abandoned landfill, mine or mill tailings check yes. In addition, provide as much detail as possible regarding the extent of
contamination and attach all sampling data. Indicate the location of the landfill, mine, etc. on the Location and Detail Maps.
Contamination plume information can be obtained from the following source:
http://www.cdphe.state.co.us/hm/HMSiteCover.htm
2. Sampling Data: If any sampling data is available that is representative of the proposed discharge mark yes. Attach a copy
of all sampling results to the application. If the data was collected for another agency or private company include a brief
description as to why the data was collected.
3. Additional Sources of Contamination: Mark yes if the proposed construction site resulting in a dewatering discharge has
been evaluated for any additional sources of contamination. Additional sources include underground storage tanks, dry
cleaners, voluntary clean-up sites, etc. Also mark yes, if a Phase I or Phase II has been conducted on the property or adjacent
properties. Attach a copy of all records (phase I, phase II, sampling efforts) that could help characterized the water to be
discharged.
Contamination plume information can be obtained from the following source:
http://www.cdphe.state.co.us/hm/HMSiteCover.htm
Item H—Additional Information
1. Stormwater Permit for Construction Activities: If the applicant holds a stormwater permit for construction related
activities (parcels > 1 acre) include the stormwater permit number. If you have applied, or intend to apply but have not yet
obtained coverage and your certification number, indicate ―Pending‖ for this item.
Item I—Signature Requirements—The permit applicant listed in Part A.1 must sign the permit application. Signatures must
meet the requirements established in Regulation 61.4(1)(h).
Page 3 of 3—Revised April 2011
APPENDIX E
INSPECTION LOGS
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APPENDIX F
CONTRACTOR INSERTS
APPENDIX G
EROSION CONTROL COST ESTIMATE
Lakeview Subdivision
Project Number: 665-002 Location: Fort Collins, CO
Date: November 21, 2013 Total Acres: 10.80
EROSION CONTROL MEASURE Units
Estimated
Quantity
Unit
Price
Total
Price
L.F. 2190 $1.85 $4,051.50
Construction Fence L.F. 700 $2.00 $1,400.00
each 12 $20.00 $240.00
Curb Inlet Protection each 1 $220.00 $220.00
Concrete Chase Setup each 1 $220.00 $220.00
Concrete Washout Area each 1 $100.00 $100.00
Sediment Trap each 1 $350.00 $350.00
Rock Sock each 12 $25.00 $300.00
Seeding and Mulching - Mobilization each 1 $1,000.00 $1,000.00
Seeding and Mulching - Installation acre 6.4 $750.00 $4,800.00
Vehicle Tracking Contol Pad each 1 $700.00 $700.00
L.F. 400 $0.50 $200.00
per hour 10 $70.00 $700.00
acre 1.60 $1,325.00 $2,120.00
Sub-Total: $16,401.50
1.5 x Sub-Total: $24,602.25
Amount of security: $24,602.25
Total Acres x $842.5/acre: $14,310.00
Sub-Total: $14,310.00
1.5 x Sub-Total: $21,465.00
Cost to Re-seed: $21,465.00
Minimum escrow amount: $16,200.00
@ $1,500/acre
Erosion Control Escrow: $24,602.25
This is an engineers estimate based upon historic costs. NES is not responsible for fluctuation in costs
NOTE: 'Total Acres' represents total disturbed area.
Option 3 | Miniumum Escrow Amount
Final Escrow Amount
Lakeview Subdivision
Erosion Control Cost Estimate
Vegetate Landscaped Areas
Option 1 | BMP Costs
Silt Fence
Sawcutting Pollution Prevention
Street Sweeping and Cleaning
Option 2 | Cost to Re-seed Disturbed acreage
Straw Wattles (9" x 10' dimension)
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VEHICLE CONTROL TRACKING PAD
NOT TO SCALE
MANHOLE
ROCK BERM SHALL
CURB INLET 2"x 4" WOOD STUD EXTENDED
INTO CONCRETE BLOCKS
WIRE ENCLOSED
1 1/2" WASHED ROCK CONCRETE
BLOCKS
CURB INLET
GRAVEL FILTER WIRE SHALL ENCLOSED BE 2"x4" WOOD STUD
OVERFLOW
FILTERED
RUNOFF
%SECTION A-A
A
A
%PLAN VIEW
{CURB INLET GRAVEL FILTER
(CONTINUOUS GRADE)}
%SECTION B-B
%PLAN VIEW
B
B
ROCK BERM SHALL BE PLACED TIGHTLY AGAINST CURB FACE
WIRE ENCLOSED 1 1/2"
WASHED ROCK
CURB AND GUTTER
CURB AND GUTTER
BE PLACED TIGHTLY
AGAINST CURB FACE
GRAVEL FILTER
1/2" TO 1" BELOW TOP OF CURB
TUBULAR
MARKER
IF AREA ADJACENT TO CURB INLET BOX IS NOT STABILIZED, INSTALL A TEMPORARY SEDIMENT/EROSION CONTROL BMP UNTIL THE SURROUNDING AREA IS SUFFICIENTLY STABILIZED.
TUBULAR
MARKER
TUBULAR
MARKER
2' 3'
4'
CURB INLET
WIRE ENCLOSED
SETTLED
RUNOFF
GRAVEL FILTER
CURB INLET MANHOLE
{CURB INLET BLOCK AND GRAVEL FILTER
(INLET IN SUMP)}
INTERIM CONFIGURATION INLET PROTECTION IN STREETS SHALL BE INSTALLED WITHIN 48 HOURS OF POURING INLET. INLET PROTECTION (AFTER PAVING) SHALL BE INSTALLED WITHIN 48
HOURS AFTER PAVING IS PLACED.
WASHED ROCK SHALL COMPLY WITH A 1-1/2" MINUS GRADATION.
WIRE MESH SHALL BE FABRICATED OF 10 GAUGE WIRE TWISTED INTO A MESH WITH A MAXIMUM OPENING OF 1" (COMMONLY TERMED "CHICKEN WIRE"). ROLL WIDTH SHALL BE 48".
TUBULAR MARKERS SHALL MEET REQUIREMENTS OF MANUAL ON UNIFORM TRAFFIC CONTROL DEVICES (MUTCD).
OTHER CURB INLET PROTECTION METHODS WILL BE ALLOWED IF ACCEPTED BY THE CITY.
{GENERAL NOTES:
}1.
2.
3.
4.
5.
THE CONTRACTOR SHALL INSPECT INLET PROTECTION EVERY TWO WEEKS AND AFTER SIGNIFICANT STORM EVENTS AND MAKE REPAIRS OR CLEAN OUT AS NECESSARY.
SEDIMENT ACCUMULATED UPSTREAM OF INLET PROTECTION SHALL BE REMOVED WHEN THE SEDIMENT DEPTH UPSTREAM OF ROCK BERM IS 2 1/2" OF THE CREST.
INLET PROTECTION IS TO REMAIN IN PLACE UNTIL THE UPSTREAM DISTURBED AREA IS STABILIZED AND GRASS COVER IS ACCEPTED. UNLESS THE CITY ACCEPTS EARLIER REMOVAL OF
INLET PROTECTION IN STREETS.
{MAINTENANCE NOTES:
}1.
2.
3.
4" MIN
5" MAX
BMP WIDTH VARIES BMP WIDTH VARIES
BMP WIDTH VARIES BMP WIDTH VARIES
TUBULAR MARKER TUBULAR MARKER
CURB INLET PROTECTION
NOT TO SCALE
IP
VEHICLE TRACKING CONTROL PAD SHALL BE LOCATED AT EVERY ACCESS POINT TO THE CONSTRUCTION SITE.
A SIGN SHALL BE PLACED NEXT TO THE VEHICLE TRACKING CONTROL PAD TO DESIGNATE THE LOCATION AS THE CONSTRUCTION ENTRANCE/EXIT.
VEHICLE TRACKING CONTROL PADS SHALL CONSIST OF HARD, DENSE, DURABLE STONE, ANGULAR IN SHAPE AND RESISTANT TO WEATHERING. ROUNDED STONE (i.e. RIVER ROCK
AND COBBLES) SHALL NOT BE USED. THE STONES SHALL BE A MINIMUM OF 3" AND A MAXIMUM OF 6" DIAMETER. THE STONES SHALL HAVE A SPECIFIC GRAVITY OF AT LEAST 2.6.
CONTROL OF GRADATION WILL BE BY VISUAL INSPECTION.
ANY CRACKED OR DAMAGED CURB AND GUTTER AND SIDEWALK SHALL BE REPLACED BY CONTRACTOR.
INSTALLATION NOTES:
1.
2.
3.
4.
CONTRACTOR SHALL INSPECT VEHICLE TRACKING CONTROL PAD DAILY. ROCK SURFACE SHALL BE CLEAN AND LOOSE ENOUGH TO RUT SLIGHTLY UNDER WHEEL LOADS AND CAUSE
LOOSE ROCK TO DISLODGE MUD FROM TIRES. WHEN ROCK BECOMES COMPACTED OR FILLED WITH SEDIMENT SO THAT THE EFFECTIVENESS OF THE PAD IS DIMINISHED, CONTRACTOR
SHALL RIP, TURN OVER, OR OTHERWISE LOOSEN ROCK, PLACE ADDITIONAL NEW ROCK, OR REPLACE WITH NEW ROCK AS NECESSARY TO RESTORE EFFECTIVENESS.
SEDIMENT AND OTHER MATERIAL SPILLED, DROPPED OR TRACKED ONTO PAVED SURFACES SHALL BE REMOVED IMMEDIATELY OR BY THE END OF EACH WORKING DAY.
VEHICLE TRACKING CONTROL PAD SHALL BE REMOVED AT THE END OF CONSTRUCTION. THE AREA SHOULD BE TOPSOILED, SEEDED, CRIMPED, AND MULCHED OR OTHERWISE
STABILIZED.
MAINTENANCE NOTES:
1.
2.
3.
3" - 6" ROCK
CONSTRUCTION FENCE, TYP., TO
DISCOURAGE
VEHICLE ACCESS EXCEPT AT VTC
SIGN "CONSTRUCTION ENTRANCE"
R=5'
PAVED SURFACE
20' MIN.
A
SECTION A
NO MATERIALS INCLUDING 2x4'S, PIPES, DIRT, GRAVEL OR ASPHALT, SHALL BE PLACED IN GUTTER TO FACILITATE MOUNTING CURB; HOWEVER, CURB MAY BE CUT DOWN TO A HEIGHT OF 2" OR HIGHER FOR EASIER
ACCESS AND REPLACED AT PROJECT COMPLETION. OTHER ACCESS DEVICES MAY BE USED AS ACCEPTED BY THE CITY. 3" - 6" ROCK
%PLAN%
CURB CUT
50' MIN.
2" MIN. 6" MIN.
6" MIN.
ALTHOUGH NOT NORMALLY USED, THE CITY RESERVES THE RIGHT TO REQUIRE VEHICLE TRACKING CONTROL WITH A TEMPORARY CATTLE GUARD
AND/OR WHEEL WASH FACILITIES AT SITES WHERE TRACKING ONTO PAVED AREAS BECOMES A SIGNIFICANT PROBLEM AS DETERMINED BY THE CITY
INSPECTOR.
IF VEHICLE TRACKING CONTROL WITH WHEEL WASH FACILITIES ARE REQUIRED, ALL WHEELS ON EVERY VEHICLE LEAVING THE SITE SHALL BE
CLEANED OF MUD USING A PRESSURE-WASHER. THE CONTRACTOR SHALL BE RESPONSIBLE FOR OBTAINING A WATER SOURCE AND CONSTRUCTING
A WASHWATER SEDIMENT TRAP.
5.
6.
IF VEHICLE WHEEL WASH FACILITIES ARE REQUIRED, CONTRACTOR SHALL INSPECT VEHICLE TRACKING CONTROL AND WHEEL WASH FACILITIES DAILY.
ACCUMULATED SEDIMENTS SHALL BE REMOVED FROM THE PAD SURFACE.
ACCUMULATED SEDIMENT IN THE WASHWATER/SEDIMENT TRAP SHALL BE REMOVED WHEN THE SEDIMENT REACHES AN AVERAGE DEPTH OF 12-INCHES.
4.
5.
VTC
003
EC3
004
EC3
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.
Call before you dig.
R
CONCRETE WASHOUT AREA SHALL BE INSTALLED PRIOR TO ANY CONCRETE PLACEMENT ON SITE.
VEHICLE TRACKING CONTROL IS REQUIRED IF ACCESS TO CONCRETE WASHOUT AREA IS OFF PAVEMENT.
SIGNS SHALL BE PLACED AT THE CONSTRUCTION ENTRANCE, AT THE WASHOUT AREA, AND ELSEWHERE AS NECESSARY TO CLEARLY
INDICATE THE LOCATION OF THE CONCRETE WASHOUT AREA TO OPERATORS OF CONCRETE TRUCKS AND PUMP RIGS.
THE CONCRETE WASHOUT AREA SHALL BE REPAIRED AND ENLARGED OR CLEANED OUT AS NECESSARY TO MAINTAIN CAPACITY FOR
WASTED CONCRETE.
AT THE END OF CONSTRUCTION, ALL CONCRETE SHALL BE REMOVED FROM THE SITE AND DISPOSED OF AT AN ACCEPTED WASTE SITE.
WHEN THE CONCRETE WASHOUT AREA IS REMOVED, THE DISTURBED AREA SHALL BE SEEDED AND MULCHED OR OTHERWISE STABILIZED IN
A MANNER ACCEPTED BY THE CITY.
LOCATION OF CONCRETE WASHOUT AREA ON SHEET EC1 IS CONCEPTUAL ONLY. FINAL LOCATION TO BE DETERMINED IN THE FIELD AT
CONTRACTOR'S DISCRETION.
{NOTES:
}1.
2.
3.
4.
5.
6.
7.
3H:1V OR FLATTER
SIDE SLOPES
12" MIN
8'x 8' MIN
OR AS REQUIRED TO
CONTAIN WASTE CONCRETE
12" 2'-0" MIN.
COMPACTED EMBANKMENT
MATERIAL, TYP.
BERM AROUND PERIMETER
GROUND SURFACE
SIGN TO INDICATE THE
LOCATION OF THE
CONCRETE WASHOUT AREA
CONCRETE WASHOUT AREA
NOT TO SCALE
CWA
007
EC3
SWALE WATTLE DIKE
NOT TO SCALE
ENTRENCH 3"
POINT A
SECTION A-A
POINTS A MUST BE HIGHER THAN POINT B
PLAN VIEW
POINT B
POINT A
WATTLE
POINT A
FLOW
POINT B
POINT A
WATTLE DIKE
{DITCH INSTALLATION}
A A
THE CONTRACTOR SHALL INSPECT DIKES EVERY TWO WEEKS AND AFTER SIGNIFICANT STORM EVENTS AND
MAKE REPAIRS OR CLEAN OUT UPSTREAM SEDIMENT AS NECESSARY.
SEDIMENT ACCUMULATED UPSTREAM OF DIKES SHALL BE REMOVED WHEN THE UPSTREAM SEDIMENT REACHES
1/2 OF THE DESIGN DEPTH.
DIKES ARE TO REMAIN IN PLACE UNTIL THE UPSTREAM DISTURBED AREA IS STABILIZED AND GRASS COVER IS
ACCEPTED BY THE CITY.
WHEN REINFORCED ROCK BERMS ARE REMOVED, ANY DISTURBED AREA SHALL BE SEEDED, CRIMPED AND
MULCHED OR OTHERWISE STABILIZED IN A MANNER ACCEPTED BY THE CITY.
{MAINTENANCE NOTES:
}1.
2.
3.
4.
WD
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.
STA %OR%
OR
(10" MIN. DIA.)
006
EC3
PORTABLE TYPE-3 BARRICADE
NOT TO SCALE
005
EC3
ORANGE CONSTRUCTION FENCE DETAIL
NOT TO SCALE
009
EC3
TEMP SLOPE DRAIN
NOT TO SCALE
008
EC3
DATE:
JANUARY 2014
PROJECT:
665-002
Sheet
Of27Sheets
LAKEVIEW SUBDIVISION
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NOT FOR CONSTRUCTION
REVIEW SET
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E N G I N E E R I N G
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PHONE: 970.221.4158 FAX: 970.221.4159
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EC2
EROSION CONTROL DETAILS
A. Boese
A. Boese
1"=50'
SILT FENCE WATTLE INSTALLATION
NOT TO SCALE
000
EC2
001
EC2
NOT TO SCALE
002
EC2
EROSION CONTROL FOR CONSTRUCTION
ON INDIVIDUAL RESIDENTIAL LOTS
COMPACTED BACKFILL
FLOW
SILT TRENCH FENCE AND FABRIC ATTACHED (ASTM TO D6461) POST. ANCHORED IN
24" MIN
6' MAX
FLOW
TRENCH AND ATTACHED TO POST.
4"x4" TRENCH
SILT FENCE FABRIC (ASTM D6461) ANCHORED IN
18" MIN
24" MIN
42" MIN
POSTS
{PREASSEMBLED SILT FENCE}
JOIN FIRST
ROTATE SECOND
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 " x 1 " WOODEN FENCE POSTS}
COMPACTED BACKFILL
SF
TOP BACK CURB
STORM WATER LINE
WEIGHTED WATTLE
AT 45 DEG. TO CURB
WATTLES - DETAIL A
FLOW
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'
WATTLES - DETAIL B
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
FLOW LINE
%CURB INLET WATTLE PROTECTION SETUP%
SEDIMENT
DEPOSITION
ZONE
LIP OF GUTTER
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:
10. 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.
11. 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.
12. 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"
W1
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.
{PERVIOUS INSTALLATION}
{IMPERVIOUS INSTALLATION}
SEDIMENT
DEPOSITION ZONE
W3
W2 NOTE:
ONLY WATTLES MADE WITH COCONUT
FIBERS SHALL BE USED WHEN
INSTALLATION COMES IN CONTACT WITH A
WATER BODY.
SIDEWALK CULVERT/CHASE/PAN
W4
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
W5
TUBULAR
MARKER
EXISTING OR
PROPOSED INLET
CONCRETE CHASE/TRICKLE CHANNEL SETUP
END SHALL
TIGHTLY ABUT TO
BACK OF CURB
CURBSIDE CHECKDAMS SETUP
NOT TO SCALE
003
EC2
FOREBAY DETAIL
PROFILE
SLOPE PER PLAN
2 x D
4" MIN.
CONCRETE
SLAB
3X1.5' DIA.
WIDTH =
2 x D
VOLUME (V)
TRICKLE CHANNEL
0.2 - 0.5% SLOPE
NOT TO SCALE
PLAN
NOT TO SCALE
FOREBAY OUTLET NOTCH
LIMITS OF 4" THICK
CONCRETE SLAB
"D"
WALL HEIGHT (H)
2 x D
1-#3 REBAR TIE @ 3" CLEAR EACH WAY FROM TOP (CURB > 12")
VERTICAL CURB
(FOREBAY WALL)
STANDARD W/
INCREASED
BOULDER
EXPOSED
6"-8"
1.5' BOULDERS
2 x D
VERTICAL CURB /FOREBAY CONCRETE WALL & 1' INFALL GUTTER, 1" DROP
10/10 WIRE REMESH THROUGHOUT
FOREBAY SCHEDULE
FOREBAY NAME WALL HEIGHT (IN)
MIN REQUIRED
VOLUME (CU-FT)
V-NOTCH RELEASE
(CFS)
V-NOTCH TOP
WIDTH (IN)
A (NORTH) 18 181 1.12 3.00
NOTES: B (WEST) 12 113 0.88 4.40
1.FIBER ROLLS TO BE STAKED AS REQUIRED.
2.FIBER ROLLS TO REMAIN IN-PLACE UNTIL VEGETATION IS ESTABLISHED.
{PLAN VIEW}
{ISOMETRIC VIEW}
DRIVEWAY
DRIVEWAY
STREET
SIDEWALK
SIDEWALK
SEDIMENT TRAP
NOT TO SCALE
004
EC2
LOD
LOD
LOD
LOD
LOD LOD
LOD
LOD LOD
LOD
LOD
LOD
LOD LOD
LOD
LOD LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
ZINNIA WAY
GERANIUM LANE
PEONY WAY
BLUEBONNET LANE
FAUBOROUGH COURT
FEATHERGRASS DRIVE
FEATHERGRASS DRIVE
DRAKE ROAD
NORTH
( IN FEET )
1 inch = ft.
50 0 50 Feet
50
100 150
1.IT SHOULD BE NOTED THAT ANY EROSION CONTROL PLAN SERVES ONLY AS A GUIDELINE TO THE CONTRACTOR. STAGING AND/OR PHASING OF BEST
MANAGEMENT PRACTICES (BMPs) IS EXPECTED. ADDITIONAL AND/OR DIFFERENT BMPs FROM THOSE ORIGINALLY DEPICTED MAY BE NECESSARY DURING
CONSTRUCTION DUE TO CHANGING SITE CONDITIONS OR AS REQUIRED BY LOCAL AUTHORITIES.
2.THIS EROSION CONTROL PLAN IS SCHEMATIC IN NATURE. AS SUCH, GRAPHICAL SYMBOLS MAY NOT BE TO SCALE, NOR ARE THEY NECESSARILY SHOWN
IN THEIR EXACT LOCATION.
3.THE CONTRACTOR SHALL BE RESPONSIBLE FOR ALL PERMITTING (CITY, STATE DISCHARGE PERMIT, ETC.) AND COMPLIANCE WITH GOVERNING
AUTHORITIES. IT SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR (OR PERMIT HOLDER) TO ENSURE EROSION CONTROL MEASURES ARE PROPERLY
MAINTAINED AND FOLLOWED.
4.CONTRACTOR SHALL IMPLEMENT THE APPROPRIATE EROSION CONTROL MEASURES ACCORDING THE THE CONSTRUCTION SEQUENCING AND LEVEL OF
SITE STABILIZATION.
5.CONTRACTOR SHALL IMPLEMENT APPROPRIATE INLET PROTECTION FOR ALL STORM DRAINS, SWALES, PONDS AND RAIN GARDENS UNTIL SITE IS FULLY
STABILIZED.
6.CONTRACTOR SHALL IMPLEMENT APPROPRIATE INLET PROTECTION FOR DOWNSPOUT CONNECTIONS, TO THE STORM DRAIN SYSTEM, UNTIL
CONNECTION IS ESTABLISHED WITH DOWNSPOUT.
7.INLET PROTECTION SHALL BE ADAPTED, AS NECESSARY, TO THE SURROUNDING SURFACE TYPE AND CONDITION (i.e., STAKE-DRIVEN WATTLES FOR BARE
SOIL OR GRAVEL SOCKS FOR PAVEMENT, ETC.)
8.CONTRACTOR IS RESPONSIBLE FOR STABILIZING ALL SLOPES, PARTICULARLY THOSE STEEPER THAN 6:1. CRIMP MULCHING, HYDRO MULCHING, EROSION
MATS, TEMPORARY IRRIGATION, AND ADDITIONAL WATTLES OR SILT FENCING MAY BE NECESSARY TO ESTABLISH VEGETATIVE COVER AND STABILIZE THE
SLOPE.
9.CONTRACTOR IS RESPONSIBLE FOR PREVENTING SEDIMENT FROM UNSTABILIZED LANDSCAPE AREAS FROM MIGRATING ONTO AND ENTERING THE
PERMEABLE PAVER SYSTEMS UNTIL UPGRADIENT TRIBUTARY AREAS ARE FULLY STABILIZED.
10.ADDITIONAL WATTLES, SILT FENCE, OR OTHER MEASURES, MAY BE NECESSARY TO ENSURE THAT EACH BUILDING PAD IS STABILIZED THROUGHOUT
CONSTRUCTION. AT NO TIME SHALL SEDIMENT BE ALLOWED TO CROSS THE PUBLIC SIDEWALKS.
11.CONTRACTOR SHALL IMPLEMENT APPROPRIATE PERIMETER PROTECTION FOR AREAS DIRECTING DRAINAGE OFFSITE. PERIMETER PROTECTION SHALL
BE ADAPTED, AS NECESSARY, TO THE SURROUNDING SURFACE TYPE AND CONDITION (i.e., STAKE-DRIVEN SEDIMENT CONTROL LOGS OR SILT FENCE FOR
BARE SOIL, SAND BAGS OR GRAVEL SOCKS FOR PAVEMENT, ETC.)
12.FUELING FACILITIES SHALL BE LOCATED AT LEAST ONE HUNDRED (100) FEET FROM NATURAL BODY OF WATER, WETLAND, NATURAL DRAINAGE WAY OR
MANMADE DRAINAGE WAY. THE FUEL TANKS AND FUELING AREA MUST BE SET IN A CONTAINMENT AREA THAT WILL NOT ALLOW A FUEL SPILL TO DIRECTLY
FLOW, SEEP, RUN OFF, OR BE WASHED INTO A BODY OF WATER, WETLAND OR DRAINAGE WAY.
13.CONSTRUCTION WASTE STORAGE (DUMPSTERS) AND PORTABLE SANITATION UNITS (CONSTRUCTION TOILETS) SHALL BE LOCATED AT LEAST FIFTY (50)
FEET FROM ANY STORMWATER INLET, WETLAND, OR DRAINAGE WAY. SAID FACILITIES MUST BE SET IN A CONTAINMENT AREA THAT WILL NOT ALLOW
POLLUTANTS TO DIRECTLY FLOW, SEEP, RUN OFF, OR BE WASHED INTO A BODY OF WATER, WETLAND OR DRAINAGE WAY. DUMPSTERS SHALL BE LOCATED
ON FLAT, STABLE GROUND, AND CONSTRUCTION TOILETS SHALL BE STAKED DOWN.
14.THE CONTRACTOR AND ALL SUBCONTRACTORS WILL COOPERATE WITH THE CITY'S CONSTRUCTION INSPECTORS BY CEASING OPERATIONS WHEN
WINDS ARE OF SUFFICIENT VELOCITY TO CREATE BLOWING DUST WHICH, IN THE INSPECTOR'S OPINION, IS HAZARDOUS TO THE PUBLIC HEALTH AND
WELFARE.
{15.WHERE SEASONAL CONSTRAINTS (E.G., DURING SUMMER AND WINTER MONTHS) INHIBIT PERMANENT SEEDING OPERATIONS, DISTURBED AREAS WILL
BE TREATED WITH MULCH AND MULCH TACKIFIER OR OTHER MATERIALS APPROVED BY EROSION CONTROL STAFF TO PREVENT EROSION.
EROSION CONTROL NOTES:
NOTE:
ALL BMPS SHOWN ON THIS PLAN ARE GRAPHIC
REPRESENTATIONS ONLY. FINAL DETERMINATION OF SIZE
AND LOCATION SHALL BE DETERMINED BY THE CONTRACTOR
AND DOCUMENTED ON THE DYNAMIC SITE PLAN.
No. Revisions:
By: Date:
REVIEWED BY:
R. Banning
DESIGNED BY:
DRAWN BY:
SCALE:
DATE:
JANUARY 2014
PROJECT:
665-002
Sheet
Of27Sheets
LAKEVIEW SUBDIVISION
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E���������� S�������, I��.
NOT FOR CONSTRUCTION
REVIEW SET
08/21/13
200 S���� C������ A�����, S���� 010
F��� C������, C������� 80524
E N G I N E E R I N G
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PHONE: 970.221.4158 FAX: 970.221.4159
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DYN1
DYNAMIC SITE PLAN
EROSION CONTROL PLAN A. Boese
A. Boese
1"=50'
TABLE OF CONSTRUCTION SEQUENCE AND BMP APPLICATION/REMOVAL
Project: Date:
Contractor to utilize this table to indicate when construction activities occur and when each associated BMP is installed or removed.
CONSTRUCTION PHASE (M������) 1 2 3 4 5 6 7 8 9 10 11 12 C�������
G������ (I������ O������)
Overlot
Swales, Drainageways
P������� I�����������
Stormwater
C������� I�����������
Landscaping Walls
Building Structure
M������������
Hardscape Amenities
BEST MANAGEMENT PRACTICES
T��������
Contour Furrows and Diversion Dikes (Ripping/Disking)
Inlet Protection (IP)
Vehicle Tracking Control (VTC)
Flow Barriers (Bales, Wattles, Etc) (WD)
Bale Outlet Protection (BOP)
Concrete Washout Area (CWA)
Preventative Maintenance Activities/Meetings/ etc.
Silt Fence & Construction Fence (SF & CF)
P��������
Mulching/Sealant (MU)
Permanent Seed Planting
Rip Rap (RR)
Water Service
Sanitary Sewer Service
Curb and Gutter
Concrete Parking and Drive Aisle
Sediment Basins/Dry Wells (SB)
Rock Socks (RS)
LEGEND:
4953
PROPOSED CONTOUR 93
PROPOSED STORM SEWER
PROPOSED SWALE
EXISTING CONTOUR
PROPOSED PROPERTY BOUNDARY CURB & GUTTER
PROPOSED INLET
PROPOSED UNDERDRAIN UD
BENCHMARK/BASIS OF BEARING
BENCHMARK #1:
City of Fort Collins Benchmark 18-92
Elevation= 4966.96
BENCHMARK #2:
City of Fort Collins Benchmark 19-92
Elevation= 4975.21
Basis of Bearing
The Basis of Bearings is the West line of the Northwest Quarter, Section 30,
Township 7 North, Range 68 West of the 6th P.M. as bearing South 00�13'48"
East (assumed bearing).
WATTLE DIKE
INLET PROTECTION IP
VEHICLE TRACKING CONTROL PAD VTC
SILT FENCE SF SF
ROCK SOCK RS
RIP RAP RR
{1.CONTRACTOR SHALL IMMEDIATELY STABILIZE ALL DISTURBED SLOPES BY CRIMP
MULCHING OR SIMILAR METHODS. CONTRACTOR TO USE CDOT STRAW MULCH SPECS
UNLESS OTHERWISE DIRECTED.
2.SWMP ADMINISTRATOR:
Contact________________________________
Company________________________________
Address________________________________
Phone________________________________
3.CONTRACTOR TO PROVIDE VEHICLE TRACKING CONTROL FOR CONCRETE
WASHOUT AREA IF ACCESS IS OFF PAVEMENT.
4.DRYWELLS AND BIORETENTION MEDIA TO BE INSTALLED AFTER STABILIZATION OF
OVERLOT GRADING.
5.ALL DISTURBED SOILS SHALL BE RESEEDED WITH A COVER CROP UPON
COMPLETION OF THE INFRASTRUCTURE IMPROVEMENTS. THE RECOMMENDED
SPECIES AND APPLICATION RATES OF PURE LIVE SEED FOR COVER CROPS ARE AS
FOLLOWS:
GREAT BASIN WILRYE3LBS/ACRE
GREEN NEEDLEGRASS2LBS/ACRE
INDIAN RICEGRASS1LBS/ACRE
SLENDER WHEATGRASS2LBS/ACRE
THICKSPIKE WHEATGRASS3LBS/ACRE
WESTERN WHEATGRASS4LBS/ACRE
TRITICALE10LBS/ACRE
WINTER WHEAT5LBS/ACRE
}6.REFER TO THE "PRELIMINARY DRAINAGE AND EROSION CONTROL REPORT FOR
LAKEVIEW SUBDIVISION" BY NORTHERN ENGINEERING, DATED NOVEMBER 21{, 2013}
FOR ADDITIONAL INFORMATION.
GENERAL NOTES:
WD
MULCH
TRAFFIC CONTROL BARRICADE TCB
CONCRETE WASH AREA CWA
MU
SEDIMENT TRAP ST
CONSTRUCTION FENCE CF CF CF
LIMITS OF DISTURBANCE LOD
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.
Call before you dig.
R
Traffic Control Barricades (TCB)
FOREBAY
MU
MU
MU
MU
MU
MU
TRACT C
LOT 24
LOT 25 LOT 26
LOT 27
LOT 28
LOT 1
LOT 2
LOT 3 LOT 4
LOT 5
LOT 6
LOT 7
LOT 8
LOT 9
LOT 10
LOT 11
LOT 12
LOT 13
LOT 14
LOT 15
LOT 16
LOT 17
LOT 18
LOT 19
LOT 20
LOT 23 LOT 22 LOT 21
LOT 42
LOT 41
LOT 40
LOT 37
LOT 36
LOT 35 LOT 34
LOT 33
LOT 32
LOT 31
LOT 30
LOT 29
TRACT A
TRACT B
LOT 39
LOT 38
ZINNIA WAY
GERANIUM LANE
BLUEBONNET LANE
OUGH COURT
FEATHERGRASS DRIVE
FEATHERGRASS DRIVE
DRAKE ROAD
MU
CF
CF
CF
CF CF CF
CF CF
CF
CF
CF
CF
LOD LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD LOD
LOD
LOD
LOD
LOD LOD
LOD
LOD LOD
LOD
LOD
LOD
LOD
LOD
LOD LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD LOD
LOD
LOD
LOD
LOD
LOD LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
FOREBAY
VTC
IP
IP
WD
WD
SF
SF
RS SF
RS
RS
RS
RS
RS
CWA
SF
SF
SF
SF
TCB
TCB
TCB
TCB
TCB
TCB
TCB
CF
CF
CF
WD
WD
ST
SF
RS
RS
SF SF SF
SF
SF
SF
SF
SF SF SF SF SF SF SF SF
SF
MU
MU
TRACK
SLOPE &
TACKIFY
SOIL
INSTALL SLOPE DRAIN
IF GRADED BUT
CONCRETE IS NOT IN
PLACE
SF
WD
NORTH
( IN FEET )
1 inch = ft.
50 0 50 Feet
50
100 150
1.IT SHOULD BE NOTED THAT ANY EROSION CONTROL PLAN SERVES ONLY AS A GUIDELINE TO THE CONTRACTOR. STAGING AND/OR PHASING OF BEST
MANAGEMENT PRACTICES (BMPs) IS EXPECTED. ADDITIONAL AND/OR DIFFERENT BMPs FROM THOSE ORIGINALLY DEPICTED MAY BE NECESSARY DURING
CONSTRUCTION DUE TO CHANGING SITE CONDITIONS OR AS REQUIRED BY LOCAL AUTHORITIES.
2.THIS EROSION CONTROL PLAN IS SCHEMATIC IN NATURE. AS SUCH, GRAPHICAL SYMBOLS MAY NOT BE TO SCALE, NOR ARE THEY NECESSARILY SHOWN
IN THEIR EXACT LOCATION.
3.THE CONTRACTOR SHALL BE RESPONSIBLE FOR ALL PERMITTING (CITY, STATE DISCHARGE PERMIT, ETC.) AND COMPLIANCE WITH GOVERNING
AUTHORITIES. IT SHALL BE THE RESPONSIBILITY OF THE CONTRACTOR (OR PERMIT HOLDER) TO ENSURE EROSION CONTROL MEASURES ARE PROPERLY
MAINTAINED AND FOLLOWED.
4.CONTRACTOR SHALL IMPLEMENT THE APPROPRIATE EROSION CONTROL MEASURES ACCORDING THE THE CONSTRUCTION SEQUENCING AND LEVEL OF
SITE STABILIZATION.
5.CONTRACTOR SHALL IMPLEMENT APPROPRIATE INLET PROTECTION FOR ALL STORM DRAINS, SWALES, PONDS AND RAIN GARDENS UNTIL SITE IS FULLY
STABILIZED.
6.CONTRACTOR SHALL IMPLEMENT APPROPRIATE INLET PROTECTION FOR DOWNSPOUT CONNECTIONS, TO THE STORM DRAIN SYSTEM, UNTIL
CONNECTION IS ESTABLISHED WITH DOWNSPOUT.
7.INLET PROTECTION SHALL BE ADAPTED, AS NECESSARY, TO THE SURROUNDING SURFACE TYPE AND CONDITION (i.e., STAKE-DRIVEN WATTLES FOR BARE
SOIL OR GRAVEL SOCKS FOR PAVEMENT, ETC.)
8.CONTRACTOR IS RESPONSIBLE FOR STABILIZING ALL SLOPES, PARTICULARLY THOSE STEEPER THAN 6:1. CRIMP MULCHING, HYDRO MULCHING, EROSION
MATS, TEMPORARY IRRIGATION, AND ADDITIONAL WATTLES OR SILT FENCING MAY BE NECESSARY TO ESTABLISH VEGETATIVE COVER AND STABILIZE THE
SLOPE.
9.CONTRACTOR IS RESPONSIBLE FOR PREVENTING SEDIMENT FROM UNSTABILIZED LANDSCAPE AREAS FROM MIGRATING ONTO AND ENTERING THE
PERMEABLE PAVER SYSTEMS UNTIL UPGRADIENT TRIBUTARY AREAS ARE FULLY STABILIZED.
10.ADDITIONAL WATTLES, SILT FENCE, OR OTHER MEASURES, MAY BE NECESSARY TO ENSURE THAT EACH BUILDING PAD IS STABILIZED THROUGHOUT
CONSTRUCTION. AT NO TIME SHALL SEDIMENT BE ALLOWED TO CROSS THE PUBLIC SIDEWALKS.
11.CONTRACTOR SHALL IMPLEMENT APPROPRIATE PERIMETER PROTECTION FOR AREAS DIRECTING DRAINAGE OFFSITE. PERIMETER PROTECTION SHALL
BE ADAPTED, AS NECESSARY, TO THE SURROUNDING SURFACE TYPE AND CONDITION (i.e., STAKE-DRIVEN SEDIMENT CONTROL LOGS OR SILT FENCE FOR
BARE SOIL, SAND BAGS OR GRAVEL SOCKS FOR PAVEMENT, ETC.)
12.FUELING FACILITIES SHALL BE LOCATED AT LEAST ONE HUNDRED (100) FEET FROM NATURAL BODY OF WATER, WETLAND, NATURAL DRAINAGE WAY OR
MANMADE DRAINAGE WAY. THE FUEL TANKS AND FUELING AREA MUST BE SET IN A CONTAINMENT AREA THAT WILL NOT ALLOW A FUEL SPILL TO DIRECTLY
FLOW, SEEP, RUN OFF, OR BE WASHED INTO A BODY OF WATER, WETLAND OR DRAINAGE WAY.
13.CONSTRUCTION WASTE STORAGE (DUMPSTERS) AND PORTABLE SANITATION UNITS (CONSTRUCTION TOILETS) SHALL BE LOCATED AT LEAST FIFTY (50)
FEET FROM ANY STORMWATER INLET, WETLAND, OR DRAINAGE WAY. SAID FACILITIES MUST BE SET IN A CONTAINMENT AREA THAT WILL NOT ALLOW
POLLUTANTS TO DIRECTLY FLOW, SEEP, RUN OFF, OR BE WASHED INTO A BODY OF WATER, WETLAND OR DRAINAGE WAY. DUMPSTERS SHALL BE LOCATED
ON FLAT, STABLE GROUND, AND CONSTRUCTION TOILETS SHALL BE STAKED DOWN.
14.THE CONTRACTOR AND ALL SUBCONTRACTORS WILL COOPERATE WITH THE CITY'S CONSTRUCTION INSPECTORS BY CEASING OPERATIONS WHEN
WINDS ARE OF SUFFICIENT VELOCITY TO CREATE BLOWING DUST WHICH, IN THE INSPECTOR'S OPINION, IS HAZARDOUS TO THE PUBLIC HEALTH AND
WELFARE.
{15.WHERE SEASONAL CONSTRAINTS (E.G., DURING SUMMER AND WINTER MONTHS) INHIBIT PERMANENT SEEDING OPERATIONS, DISTURBED AREAS WILL
BE TREATED WITH MULCH AND MULCH TACKIFIER OR OTHER MATERIALS APPROVED BY EROSION CONTROL STAFF TO PREVENT EROSION.
EROSION CONTROL NOTES:
NOTE:
ALL BMPS SHOWN ON THIS PLAN ARE GRAPHIC
REPRESENTATIONS ONLY. FINAL DETERMINATION OF SIZE
AND LOCATION SHALL BE DETERMINED BY THE CONTRACTOR
AND DOCUMENTED ON THE DYNAMIC SITE PLAN.
No. Revisions:
By: Date:
REVIEWED BY:
R. Banning
DESIGNED BY:
DRAWN BY:
SCALE:
DATE:
JANUARY 2014
PROJECT:
665-002
Sheet
Of27Sheets
LAKEVIEW SUBDIVISION
T���� �������� ���
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�������� �� N�������
E���������� S�������, I��.
��� ��� ��� �� �� ���� ���
��� ���� �� ������������
������ ������ ��� ������ ��
� P����������� E������� ��
��� ������ �� N�������
E���������� S�������, I��.
NOT FOR CONSTRUCTION
REVIEW SET
08/21/13
200 S���� C������ A�����, S���� 010
F��� C������, C������� 80524
E N G I N E E R I N G
� � � � � � ��
PHONE: 970.221.4158 FAX: 970.221.4159
���.�������������������.���
EC1
EROSION CONTROL PLAN
A. Boese
A. Boese
1"=50'
TABLE OF CONSTRUCTION SEQUENCE
AND BMP APPLICATION
Project: PATEROS CREEK
CONSTRUCTION PHASE MOBILIZATION DEMOLITION GRADING
BEST MANAGEMENT PRACTICES (BMPS)
STRUCTURAL "INSTALLATION"
Construction & Silt Fence Barriers *
Flow Barriers (Wattles) *
Inlet Filter Bags *
Rip Rap
V���������
Temporary Seeding Planting
Mulching / Sealant
Permanent Seeding Planting
Sod Installation
Rolled Products : Netting / Blankets / Mats
Contour Furrows (Ripping / Disking)
Sediment Basin
Rock Bags *
UTILITIES
INSTALLATION
FLAT WORK
INSTALLATION
VERTICAL
INSTALLATION LANDSCAPE DEMOBILIZATION
Vehicle Tracking Pad *
* All Temporary BMPs to be Removed once Construction is Complete
Other:
Any prior inlets that could use protecting
Any prior inlets that could use protecting
Anytime the site will sit dormant longer than 30 Days
Anytime the site will sit dormant longer than 30 Days
Anytime the site will sit dormant longer than 30 Days
LEGEND:
4953
PROPOSED CONTOUR 93
PROPOSED STORM SEWER
PROPOSED SWALE
EXISTING CONTOUR
PROPOSED PROPERTY BOUNDARY CURB & GUTTER
PROPOSED INLET
PROPOSED UNDERDRAIN UD
BENCHMARK/BASIS OF BEARING
BENCHMARK #1:
City of Fort Collins Benchmark 18-92
Elevation= 4966.96
BENCHMARK #2:
City of Fort Collins Benchmark 19-92
Elevation= 4975.21
Basis of Bearing
The Basis of Bearings is the West line of the Northwest Quarter, Section 30,
Township 7 North, Range 68 West of the 6th P.M. as bearing South 00�13'48"
East (assumed bearing).
WATTLE DIKE
INLET PROTECTION IP
VEHICLE TRACKING CONTROL PAD VTC
SILT FENCE SF SF
ROCK SOCK RS
RIP RAP RR
{1.CONTRACTOR SHALL IMMEDIATELY STABILIZE ALL DISTURBED SLOPES BY CRIMP
MULCHING OR SIMILAR METHODS. CONTRACTOR TO USE CDOT STRAW MULCH SPECS
UNLESS OTHERWISE DIRECTED.
2.SWMP ADMINISTRATOR:
Contact________________________________
Company________________________________
Address________________________________
Phone________________________________
3.CONTRACTOR TO PROVIDE VEHICLE TRACKING CONTROL FOR CONCRETE
WASHOUT AREA IF ACCESS IS OFF PAVEMENT.
4.DRYWELLS AND BIORETENTION MEDIA TO BE INSTALLED AFTER STABILIZATION OF
OVERLOT GRADING.
5.ALL DISTURBED SOILS SHALL BE RESEEDED WITH A COVER CROP UPON
COMPLETION OF THE INFRASTRUCTURE IMPROVEMENTS. THE RECOMMENDED
SPECIES AND APPLICATION RATES OF PURE LIVE SEED FOR COVER CROPS ARE AS
FOLLOWS:
GREAT BASIN WILRYE3LBS/ACRE
GREEN NEEDLEGRASS2LBS/ACRE
INDIAN RICEGRASS1LBS/ACRE
SLENDER WHEATGRASS2LBS/ACRE
THICKSPIKE WHEATGRASS3LBS/ACRE
WESTERN WHEATGRASS4LBS/ACRE
TRITICALE10LBS/ACRE
WINTER WHEAT5LBS/ACRE
}6.REFER TO THE "PRELIMINARY DRAINAGE AND EROSION CONTROL REPORT FOR
LAKEVIEW SUBDIVISION" BY NORTHERN ENGINEERING, DATED NOVEMBER 21{, 2013}
FOR ADDITIONAL INFORMATION.
GENERAL NOTES:
WD
MULCH
TRAFFIC CONTROL BARRICADE TCB
CONCRETE WASH AREA CWA
MU
SEDIMENT TRAP ST
CONSTRUCTION FENCE CF CF CF
LIMITS OF DISTURBANCE LOD
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.
Call before you dig.
R
City Engineer Date
Date
Date
Date
Date
Stormwater Utility
Parks & Recreation
Traffic Engineer Date
APPROVED:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
CHECKED BY:
Water & Wastewater Utility
City of Fort Collins, Colorado
UTILITY PLAN APPROVAL
Environmental Planner
N/A
Under slope stabilization rolled products. Reseeding may be required.