HomeMy WebLinkAboutErosion & Sediment Control BMP'sEROSION & SEDIMENT CONTROL BMP'S
iAN DRAINAGE FLOO❑ CONTROL DISTRICT - 'VOL. 37
Silt Fence (SF) SC-1
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
Photograph SF-1. Silt fence creates a sediment barrier, forcing
sheet flow runoff to evaporate or infiltrate.
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
November 2010 Urban Drainage and Flood Control District SF-1
Urban Storm Drainage Criteria Manual Volume 3
SC-1 Silt Fence (SF)
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.
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.
SF-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Silt Fence (SF)
SILT FENCE
GEOTEXTILE
COMPACTED
BACKFILL
FLOW
EXISTING
GROUND
6" MIN
AT LEAST 10"
OF SILT FENCE
"TAIL" SHALL BE 4" MIN
BURIED
POSTS SHALL BE JOINED AS
SHOWN, THEN ROTATED 180 DEG.
IN DIRECTION SHOWN AND DRIVEN
INTO THE GROUND
SC-1
1Y2'x 1Y2" SF
(RECOMMENDED) WOODEN
FENCE POST WITH 10' MAX
SPACING
18"
MIN
SILT FENCE
36"-48"
TYP.
POSTS SHALL OVERLAP
AT JOINTS SO THAT NO GAPS
EXIST IN SILT FENCE,
THICKNESS OF GEOTEXTILE HAS
BEEN EXAGGERATED, TYP
SECTION A
SF--1. SILT FENCE
November 2010 Urban Drainage and Flood Control District SF-3
Urban Storm Drainage Criteria Manual Volume 3
SC-1 Silt Fence (SF)
SILT FENCE INSTALL90N -NOTES
1. SILT FENCE MUST BE PLACED AWAY FROM THE TOE OF THE SLOPE TO ALLOW FOR WATER
PONDING. SILT FENCE AT THE TOE OF A SLOPE SHOULD BE INSTALLED IN A FLAT LOCATION
AT LEAST SEVERAL FEET (2-5 FT) FROM THE TOE OF THE SLOPE TO ALLOW ROOM FOR
PONDING AND DEPOSITION.
2. A UNIFORM 6" X 4" ANCHOR TRENCH SHALL BE EXCAVATED USING TRENCHER OR SILT
FENCE INSTALLATION DEVICE. NO ROAD GRADERS, BACKHOES, OR SIMILAR EQUIPMENT SHALL
BE USED.
3. COMPACT ANCHOR TRENCH BY HAND WITH A "JUMPING JACK" OR BY WHEEL ROLLING,
COMPACTION SHALL BE SUCH THAT SILT FENCE RESISTS BEING PULLED OUT OF ANCHOR
TRENCH BY HAND.
4. SILT FENCE SHALL BE PULLED TIGHT AS IT IS ANCHORED TO THE STAKES. THERE SHOULD
BE NO NOTICEABLE SAG BETWEEN STAKES AFTER IT HAS BEEN ANCHORED TO THE STAKES.
5. SILT FENCE FABRIC SHALL BE ANCHORED TO THE STAKES USING 1" HEAVY DUTY STAPLES
OR NAILS WITH 1" HEADS. STAPLES AND NAILS SHOULD BE PLACED 3" ALONG THE FABRIC
DOWN THE STAKE.
6. AT THE END OF A RUN OF SILT FENCE ALONG A CONTOUR, THE SILT FENCE SHOULD BE
TURNED PERPENDICULAR TO THE CONTOUR TO CREATE A "J—HOOK." THE "J—HOOK"
EXTENDING PERPENDICULAR TO THE CONTOUR SHOULD BE OF SUFFICIENT LENGTH TO KEEP
RUNOFF FROM FLOWING AROUND THE END OF THE SILT FENCE (TYPICALLY 10' — 20').
7. SILT FENCE SHALL BE INSTALLED PRIOR TO ANY LAND DISTURBING ACTIVITIES.
SILT FENCE MAINTENANCE NOTES
1. INSPECT BMPs EACH WORKDAY, AND MAINTAIN THEM IN EFFECTIVE OPERATING CONDITION.
MAINTENANCE OF SMPs SHOULD BE PROACTIVE, NOT REACTIVE. INSPECT BMPs AS SOON AS
POSSIBLE (AND ALWAYS WITHIN 24 HOURS) FOLLOWING A STORM THAT CAUSES SURFACE
EROSION, AND PERFORM NECESSARY MAINTENANCE.
2. FREQUENT OBSERVATIONS AND MAINTENANCE ARE NECESSARY TO MAINTAIN BMPs IN
EFFECTIVE OPERATING CONDITION. INSPECTIONS AND CORRECTIVE MEASURES SHOULD BE
DOCUMENTED THOROUGHLY.
3. WHERE BMPs HAVE FAILED, REPAIR OR REPLACEMENT SHOULD BE INITIATED UPON
DISCOVERY OF THE FAILURE.
4. SEDIMENT ACCUMULATED UPSTREAM OF THE SILT FENCE SHALL BE REMOVED AS NEEDED
TO MAINTAIN THE FUNCTIONAUTY OF THE BMP, TYPICALLY WHEN DEPTH OF ACCUMULATED
SEDIMENTS IS APPROXIMATELY 6
5. REPAIR OR REPLACE SILT FENCE WHEN THERE ARE SIGNS OF WEAR, SUCH AS SAGGING,
TEARING, OR COLLAPSE.
6. SILT FENCE IS TO REMAIN IN PLACE UNTIL THE UPSTREAM DISTURBED AREA IS STABILIZED
AND APPROVED BY THE LOCAL JURISDICTION, OR IS REPLACED BY AN EQUIVALENT PERIMETER
SEDIMENT CONTROL BMP.
7. WHEN SILT FENCE IS REMOVED, ALL DISTURBED AREAS SHALL BE COVERED WITH TOPSOIL,
SEEDED AND MULCHED OR OTHERWISE STABILIZED AS APPROVED BY LOCAL JURISDICTION.
(DETAIL ADAPTED FROM TOWN OF PARKER, COLORADO AND CITY OF AURORA, NOT AVAILA13LE IN AUTOCAD)
NOTE: MANY JURISDICTIONS HAVE BMP DETAILS THAT VARY FROM UDFCD STANDARD DETAILS,
CONSULT WITH LOCAL JURISDICTIONS AS TO WHICH DETAIL SHOULD BE USED WHEN
DIFFERENCES ARE NOTED.
SF-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Sediment Control Log (SCL)
Description
A sediment control log is a linear roll
made of natural materials such as
straw, coconut fiber, or compost. The
most common type of sediment control
log has straw filling and is often
referred to as a "straw wattle." All
sediment control logs 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:
in 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.)
19 On disturbed slopes to shorten flow
lengths (as an erosion control).
SC-2
Photographs SCL-1 and SCL-2. Sediment control logs used as 1) a
perimeter control around a soil stockpile; and, 2) as a'Thook"
perimeter control at the comer of a construction site.
■ 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
November 2015 Urban Drainage and Flood Control District SCL-1
Urban Storm Drainage Criteria Manual Volume 3
SC-2 Sediment Control Log (SCL)
Although sediment control logs initially allow runoff to flow through the BMP, they can quickly become
a barrier and should be installed as if they are impermeable.
Design details and notes for sediment control logs are provided in the following details. Sediment logs
must be properly installed per the detail 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 (if lighter than 8 lb/foot), 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
appropriate when used in perimeter control, inlet protection and check dam applications. Compost from
compost sediment control logs may be spread over the area and seeded as long as this does not cover
newly established vegetation.
SCL-2 Urban Drainage and Flood Control District November 2015
Urban Storm Drainage Criteria Manual Volume 3
Sediment Control Log (SCL)
I - SCL-
Y
-Z-QL4_CENTER (rym.
SC-2
S C-1
UV2,, x 18" (MIN)
WOODEN STAKE
9" DIAMETER (MIN)
SEDIMENT -CONTROL LOG
NOTES,
DIAM.
r) --M D! AN 1,
FLOIN D I AN 1,
OF S-CL 1.1-ARGER DIAMETER
SI: SEDIMBNT CONTROL
L 'S MAY NEED TO
8E E DEEPER.
2.PLACE LOG AGAINST
SiDBQALK OR BACK OF
C -'JA.CENURB WHEN AID I T
TO THESE FEATURES.
TRENCHED SEDIMENT CONTROL LOG
CENTER STAKE IN CONTROL 1-00
COMPACTED EXCAVATED 9" GIAMErER (MIN)
TRENCH SOIL SEDINA.ENT CONTROL LOG
FLOW X- DIAM, 5-C-L (TYP.)
71
SECTION
TRENCHED SEDIMENT CONTROL LOG
9" DIAMETER (MIN)
SEDIMENT CONTROL 1-00
12" ,YVERLAP
LOG JOINTS
WOODEN STAKE
SCL-1. TRENCHED SEDIMENT CONTROL LOG
November 2015 Urban Drainage and Flood Control District SCL-3
Urban Storm Drainage Criteria Manual Volume 3
SC-2 Sediment Control Log (SCL)
Q
41
x I'Y" x I -A" (MIN!
'+VnvCEN STAKE
O,N CENTER (T6,
FLOW DIAM,
-
ter- •...�.::,
I DIAMETER (MIN) COMP05T
` E01MENT CONTROL LOC,
NOTES;
? •THI`; DETAIL IS FOR
USE iNITH SEDIt-dE,NT
CONTROL LOGS THAT
ARE A MINIMUM OF
8 LA/Fr
2.PLACE LOG ACAVNST
SIDEWALK OR BACK OF
CURB WHEN AWAiCENT
TO THESE FEATLPES•
COMPOST SEDIMENT CONTROL LOG WEIGHTED
-- CENTER STAKE IN CONTROL LOG
3. 9" DIAMETER (MINI) CC ?POST
- � SEDIMENT CONTROL LOG
f3LCYlN�+rf�LACE� FILTER
MEDIA OR SOIL
FLON —
�` ✓� of �' -•t ;��,.
SECTION
COMPOST SEDIMENT CONTROL LOG
9- DIAMETER (MIN)
SEDIMENT CONTROL LCC
12" OVERLAP
{Milli.]
LOG JOINTS
1%" x 1 ' x 18" 0411N)
z
'VJOODEI`l STAKE
SCL-2 COMPOST SEDIMENT CONTROL LOG ,WEIGHTED
SCL-4 Urban Drainage and Flood Control District November 2015
Urban Storm Drainage Criteria Manual Volume 3
Sediment Control Log (SCL) SC-2
4' MAX FOR TRENCHED S CLs
i]' MAY FOR COMPOST SCLs
VERACAL SPACING
VARIES DEPENDING
ON SLOPE m—
f:r AT PERIMETER OF
CON3RUCTION SITE
SCL-3. SEDIMENT CONTROL LOGS TO CONTROL
SLOPE LENGTH
November 2015 Urban Drainage and Flood Control District SCL-5
Urban Storm Drainage Criteria Manual Volume 3
SC-2 Sediment Control Log (SCL)
SEDIMENT CONTROL LOG INS-TALLATiON NOTES
I. SEE PLAN VIEW FOR LOCATION ANtD LENGTH OF SEDIMENT CONTROL LOGS.
2. SEDIMENT CONTROL LUGS THAT ACT AS A PERIMETER CONTROL SHALL BE INSTALLED PRIOR
TO ANY UPGRADIENT LAND —DISTURBING ACTIVITIES.
3, SEDIMENT CONTROL LOGS SHALL CONSIST OF STRAW, COMPOST, EXCELSIOR OFF COCONUT
FIBER, AND SHALL BE FREE OF ANY NOXIOUS WEED SEEDS OR DEFECTS INCLUDING RIPS,
HOLES AND OBVIOUS 'YEAR_
4. SEDIMENT CONTROL LOGS MAY BE USED AS SMALL CHECK DAMS IN DITCHES AND SWALES,
HOWEVER, THEY SHOULD NOT BE USED IN PERENNIAL STREAMS.
5. IT IS RECOMMENDED THAT SEDIMENT CONTROL LOGS BE TRENCHED INTO THE GROUND TO
A DEPTH OF APPROXIMATELY Y3 OF THE DIAMETER OF THE LOG. IF TRENCHING TO THIS
DEPTH IS NOT FEASIBLE ANt)/OR DESIRABLE (SHORT TERM INSTALLATION WITH DESIRE NOT TO
OANIAGE LANDSCAPE) A LESSER TRENCHING DEPTH MAY BE ACCEPTABLE WITH MORE ROBUST
STAKING, COMPOST LOGS THAT ARE 8 LB/FT DO NOT NEED TO 13E TRENCHED.
6. THE UPHILL SIDE OF THE SEDIMENT CONTROL LOG SHALL BE BACKFILLED WITH SOIL OR
FILTER MATERIAL THAT 15 FLEE OF ROCKS AND DEBRIS. THE SOIL SHALL GE TIGHTLY
COMPACTED INTO THE SHAPE OF A RIGHT TRIANGLE USING A SHOVEL OR WEIGHTED LAWN
ROLLER OR BLOWN IN PLACE.
7, FOLLOW MANUFACTURERS' GUIDANCE FOR STAKING. IF MANUFACTURERS' INSTRUCTIONS
DO NOT SPECIFY SPACING, STAKES SHALL BE PLACED ON 4' CENTERS AND EMBEDDED A
MINIMUM OF 6" INTO THE GROUND, 3" OF THE STAKE SHALL PROTRUDE FROM THE TOP OF
THE LOG, STAKES THAT ARE BROKEN PRIOR 1-0 INSTALLATION SHALL BE REPLACED. COMPOST
LOGS SHOULD BE STAKED -10' ON CENTER.
SEDIMENT CONTROL LOG MAINTENANCE NOTES
1. INSPECT SMPs EACH WORKDAY, AND MAINTAIN THEM IN EFFECTIVE OPERATING CONDITION.
MAINTENANCE OF BMPS SHOULD BE PROACTIVE, NOT REACTIVE. INSPECT BMPs AS SOON AS
POSS113LE (AND ALWAYS WITH[N 24 HOURS) FOLLOWING A STORY THAT CAUSES SURFACE
EROSION, AND PERFORM NECESSARY MAINTENANCE.
2. FREQUENT ORSERVATIONS AND MAINTENANCE ARE NECESSARY TO MAINTAIN amps IN
EFFECTIVE OPERATING CONDITION. INSPECTIONS AND CORRECTIVE MEASURES SHOULD BE
DOCUMENTED THOROUGHLY,
3. WHERE BMPs HAVE FAILED, REPAIR OR REPLACEMENT SHOULD BE INITIATED UPON
DISCOVERY OF THE FAILURE,
4. SEDIMENT ACCUMULATED UPSTREAM OF SEDIMENT CONTROL LOG SHALL BE REMOVED AS
NEEDED TO MAINTAIN FUNCTIONALITY OF THE SMP, TYPICALLY WHEN DEPTH OF ACCUMULATED
SEDIMENTS IS APPROXIMATELY X OF THE HEIGHT OF THE SEDIMENT CONTROL LOG.
5, SEDIMENT CONTROL LOG SHALL BE REMOVED AT THE END OF CONSTRUCTION, COM POST
FROM COMPOST LOGS MAY BE LEFT IN PLACE AS LONG AS BAGS ARE REMOVED AND THE
AREA SEEDED. IF DISTUR9ED AREAS EXIST AFTER REMOVAL, THEY SHALL BE COVERED WITHTOP SOIL, SEEDED AND MULCHED OR OTHERWISE STABILIZED IN ;A MANNER APPROVED BY
THE LOCAL JURISDICTION.
(DETAILS ADAPTED FROM TOWN OF PARKER, COLORADO, JEFFERSON COUNTY, COLDRA00, DOUGLAS COUNTY, COLORADO.
AND CITY OF AUfiORA. COLOSZMDO, NOT AVAILABLE IN AUTOCAD)
NOTE: MANY JURISDICTIONS HAVE HMP DETAILS THAT VARY FROM UDFCD STANDARD DETAILS.
CONSULT WITH LOCAL JURISDICMNS AS TO WHICH DETAIL SHOULD 8E USED WHEN
DIFFERENCES ARE NOTED.
SCL-6 Urban Drainage and Flood Control District November 2015
Urban Storm Drainage Criteria Manual Volume 3
Straw Bale Barrier (SBB)
SC-3
Description
A straw bale barrier is a linear wall of
straw bales designed to intercept sheet
flow and trap sediment before runoff exits
a disturbed area.
Appropriate Uses
Appropriate uses of properly installed
straw bale barriers may include:
■ As a perimeter control for a site or soil
stockpile.
■ As a sediment control at the toe of an
erodible slope.
Photograph SBB-1. Straw bale barrier used for perimeter control.
Photo courtesy of Tom Gore.
■ Along the edge of a stream or drainage
pathway to reduce sediment laden runoff from entering the waterway.
■ As part of an inlet protection design in sump conditions (See Inlet Protection BMP).
Do not use straw bale barriers in areas of concentrated flow or in areas where ponding is not desirable.
Straw bales tend to degrade quickly, so they should generally not be used in areas where longer term
disturbance is expected.
Due to a history of inappropriate placement, poor installation, and short effective lifespan, the use of
straw bales is discouraged or prohibited by some communities.
Design and Installation
The maximum recommended tributary drainage area per 100 lineal feet of straw bale barrier is 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. Design details with notes are provided in Detail SB13-1.
To be effective, bales must be installed in accordance with the design details with proper trenching,
staking, and binding. Jute and cotton string must not be used to bind the straw bale. The bales should be
certified weed -free prior to use.
Maintenance and Removal
Check bales for rotting and replace as necessary. Straw bales degrade, and rotting bales require
replacement on a regular basis (as often as every three months) depending on environmental conditions.
Check for undercutting, bypassed flows, and displacement.
Repair by properly re -installing the straw bale barrier and
repairing washouts around the bales. Remove sediment
accumulated behind the bale when it reaches one -quarter of
the bale height. Remove and properly dispose of the straw
bale once the upstream area has been stabilized. Areas of
disturbance beneath the bale should be seeded and mulched
when the bale is removed.
Straw Bale Barrier
Functions
Erosion Control
No
Sediment Control
Moderate
Site/Material Management
No
November 2010 Urban Drainage and Flood Control District SB13-1
Urban Storm Drainage Criteria Manual Volume 3
SC-3 Straw Sale Barrier (SBB)
�,...�
B B
CS
BALE LENGTH
ijj 36" TYP 2"X2°X24"
STAKE
A
FLOW
BACKFILL AND COMPACT
EXCAVATED TRENCH SOIL
BINDING WIRE
OR TWINE
STRAW BALE
L4"MIN
SALE WIDTH
18" TYP
TRENCH FOR STRAW BALE
2"X2"X24°
STAKE
BACKFILL AND COMPACT
EXCAVATED TRENCH -SOIL
18" TYP FLOW
6 " MIN -j H L 4' MIN
SECTION A
SUB-1 . STRAW BALE
SBB-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Straw Bale Barrier (SBB)
SC-3
STRAW SALE INSTALLATION
1. SEE PLAN VIEW FOR:
—LOCATIONS) OF STRAW BALES.
2. STRAW BALES SHALL CONSIST OF CERTIFIED WEED FREE STRAW OR HAY. LOCAL
JURISDICTIONS MAY REQUIRE PROOF THAT BALES ARE WEED FREE,
3. STRAW BALES SHALL CONSIST OF APPROXIMATELY 5 CUBIC FEET OF STRAW OR HAY AND
WEIGH NOT LESS THAN 35 POUNDS.
4_ WHEN STRAW BALES ARE USED IN SERIES AS A BARRIER, THE END OF EACH BALE SHALL
BE TIGHTLY ABUTTING ONE ANOTHER,
5. STRAW BALE DIMENSIONS SHALL BE APPROXIMATELY 36"X18"X18",
6. A UNIFORM ANCHOR TRENCH SHALL BE EXCAVATED TO A DEPTH OF 4". STRAW BALES
SHALL BE PLACED SO THAT BINDING TWINE IS ENCOMPASSING THE VERTICAL SIDES OF THE
BALE(S). ALL EXCAVATED SOIL SHALL BE PLACED ON THE UPHILL SIDE OF THE STRAW BALES)
AND COMPACTED.
7. TWO (2) WOODEN STAKES SHALL BE USED TO HOLD EACH BALE IN PLACE. WOODEN
STAKES SHALL BE 2"X2"X24", WOODEN STAKES SHALL BE DRIVEN 6" INTO THE GROUND.
TRaw BALE MAINTENANCE NOTES
1. INSPECT BMPs EACH WORKDAY, AND MAINTAIN THEM IN EFFECTIVE OPERATING CONDITION.
MAINTENANCE OF BMPs SHOULD BE PROACTIVE, NOT REACTIVE. INSPECT BMPs AS SOON AS
POSSIBLE (AND ALWAYS WITHIN 24 HOURS) FOLLOWING A STORM THAT CAUSES SURFACE
EROSION, AND PERFORM NECESSARY MAINTENANCE,
2. FREQUENT OBSERVATIONS AND MAINTENANCE ARE NECESSARY TO MAINTAIN BMPS IN
EFFECTIVE OPERATING CONDITION. INSPECTIONS AND CORRECTIVE MEASURES SHOULD BE
DOCUMENTED THOROUGHLY.
3. WHERE BMPs HAVE FAILED, REPAIR OR REPLACEMENT SHOULD BE INITIATED UPON
DISCOVERY OF THE FAILURE.
4. STRAW BALES SHALL BE REPLACED IF THEY BECOME HEAVILY SOILED, ROTTEN, OR
DAMAGED BEYOND REPAIR.
5_ SEDIMENT ACCUMULATED UPSTREAM OF STRAW BALE BARRIER SHALL BE REMOVED AS
NEEDED TO MAINTAIN FUNCTIONALITY OF THE BMP, TYPICALLY WHEN DEPTH OF ACCUMULATED
SEDIMENTS IS APPROXIMATELY Y4 OF THE HEIGHT OF THE STRAW BALE BARRIER.
6_ STRAW BALES ARE TO REMAIN IN PLACE UNTIL THE UPSTREAM DISTURBED AREA IS
STABILIZED AND APPROVED BY THE LOCAL JURISDICTION,
7. WHEN STRAW BALES ARE REMOVED, ALL DISTURBED AREAS SHALL BE COVERED WITH
TOPSOIL, SEEDED AND MULCHED OR OTHERWISE STABILIZED AS APPROVED BY LOCAL
JURISDICTION.
(DETAILS ADAPTED FROM TOWN OF PARKER, COLORADO, NOT AVAILABLE IN AUTOCaD)
NOTE; MANY JURISDICTIONS HAVE BMP DETAILS THAT VARY FROM UDFCD STANDARD DETAILS,
CONSULT WITH LOCAL JURISDICTIONS AS TO WHICH DETAIL SHOULD BE USED WHEN
DIFFERENCES ARE NOTED.
November 2010 Urban Drainage and Flood Control District SBB-3
Urban Storm Drainage Criteria Manual Volume 3
Good Housekeeping Practices (GH) MM-3
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
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.
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 or.
site.
Good Housekeeping
Functions
Erosion Control
No
Sediment Control
No
Site/Material Management
Yes
November 2010 Urban Drainage and Flood Control District GH-1
Urban Storm Drainage Criteria Manual Volume 3
MM-3 Good Housekeeping Practices (GH)
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.
Photograph GH-3. Locate portable toilet facilities on level
surfaces away from waterways and storm drains. Photo
courtesy of W WE.
GH-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Good Housekeeping Practices (
MM-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, beans, 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 fiom 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 constriction process, consider these practices which will
help prevent contamination of stonmwater. Include the locations of these areas and the maintenance
and inspection procedures in the SWMP.
November 2010 Urban Drainage and Flood Control District GH-3
Urban Storm Drainage Criteria Manual Volume 3
MM-3 Good Housekeeping Practices (GH)
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.
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.
GH-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Good Housekeeping Practices (
M M-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 implernenting 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.
November 2010 Urban Drainage and Flood Control District GH-5
Urban Storm Drainage Criteria Manual Volume 3
MM-3 Good Housekeeping Practices (GH)
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.et)a.ggvloilspiII/spcc hmi.
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.usc&MU.
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.
GH-6 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Construction Phasing/Sequencing (CP) SM-1
Description
Effective construction site management
to minimize erosion and sediment
transport includes attention to
construction phasing, scheduling, and
sequencing of land disturbing activities.
On most construction projects, erosion
and sediment controls will need to be
adjusted as the project progresses and
should be documented in the SWMP.
Construction phasing refers to
disturbing only part of a site at a time to
limit the potential for erosion from
dormant parts of a site. Grading
activities and construction are completed
and soils are effectively stabilized on one
part of a site before grading and
construction begins on another portion of the site:
Photograph CP-1. Construction phasing to avoid disturbing the
entire area at one time. Photo courtesy of WWE.
Construction sequencing or scheduling refers to a specified work schedule that coordinates the timing of
land disturbing activities and the installation of erosion and sediment control practices.
Appropriate Uses
All construction projects can benefit from upfront planning to phase and sequence construction activities
to minimize the extent and duration of disturbance. Larger projects and linear construction projects may
benefit most from construction sequencing or phasing, but even small projects can benefit from
construction sequencing that minimizes the duration of disturbance.
Typically, erosion and sediment controls needed at a site will change as a site progresses through the
major phases of construction. Erosion and sediment control practices corresponding to each phase of
construction must be documented in the SWMP.
Design and Installation
BMPs appropriate to the major phases of development should be identified on construction drawings. In
some cases, it will be necessary to provide several drawings showing construction -phase BMPs placed
according to stages of development (e.g., clearing and grading, utility installation, active construction,
final stabilization). Some municipalities in the Denver area set maximum sizes for disturbed area
associated with phases of a construction project. Additionally, requirements for phased construction
drawings vary among local governments within the UDFCD boundary. Some local governments require
separate erosion and sediment control drawings for initial
BMPs, interim conditions (in active construction), and final
stabilization.
Construction Scheduling
Functions
Erosion Control
Moderate
Sediment Control
Moderate
Site/Material Mana ement
Yes
November 2010 Urban Drainage and Flood Control District CP-1
Urban Storm Drainage Criteria Manual Volume 3
SM-1 Construction Phasing/Sequencing (CP)
Typical construction phasing BMPs include:
■ Limit the amount of disturbed area at any given time on a site to the extent practical. For example, a
100-acre subdivision might be constructed in five phases of 20 acres each.
■ If there is carryover of stockpiled material from one phase to the next, position carryover material in a
location easily accessible for the pending phase that will not require disturbance of stabilized areas to
access the stockpile. Particularly with regard to efforts to balance cut and fill at a site, careful
planning for location of stockpiles is important.
Typical construction sequencing BMPs include:
■ Sequence construction activities to minimize duration of soil disturbance and exposure. For example,
when multiple utilities will occupy the same trench, schedule installation so that the trench does not
have to be closed and opened multiple times.
■ Schedule site stabilization activities (e.g., landscaping, seeding and mulching, installation of erosion
control blankets) as soon as feasible following grading.
■ Install initial erosion and sediment control practices before construction begins. Promptly install
additional BMPs for inlet protection, stabilization, etc., as construction activities are completed.
Table CP-I provides typical sequencing of construction activities and associated BMPs.
Maintenance and Removal
When the construction schedule is altered, erosion and sediment control measures in the SWMP and
construction drawings should be appropriately adjusted to reflect actual "on the ground" conditions at the
construction site. Be aware that changes in construction schedules can have significant implications for
site stabilization, particularly with regard to establishment of vegetative cover.
CP-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Construction Phasing/Sequencing (CP) SM-1
Table CP-1. Typical Phased BMP Installation for Construction Projects
Project BMPs
Phase I
■ Install sediment controls downgradient of access point (on paved streets this may consist
of inlet protection).
■ Establish vehicle tracking control at entrances to paved streets. Fence as needed.
Pre -
disturbance, Use construction fencing to define the boundaries of the project and limit access to areas of
Site Access the site that are not to be disturbed.
Note: it may be necessary to protect inlets in the general vicinity of the site, even if not
downgradient, if there is a possibility that sediment tracked from the site could contribute
to the inlets.
■ Install perimeter controls as needed on downgradient perimeter of site (silt fence, wattles,
etc).
■ Limit disturbance to those areas planned for disturbance and protect undisturbed areas
within the site (construction fence, flagging, etc).
■ Preserve vegetative buffer at site perimeter.
■ Create stabilized staging area.
■ Locate portable toilets on flat surfaces away from drainage paths. Stake in areas
susceptible to high winds.
■ Construct concrete washout area and provide signage.
■ Establish waste disposal areas.
Site Clearing
and Grubbing . Install sediment basins.
■ Create dirt perimeter berms and/or brush barriers during grubbing and clearing.
■ Separate and stockpile topsoil, leave roughened and/or cover.
■ Protect stockpiles with perimeter control BMPs. Stockpiles should be located away from
drainage paths and should be accessed from the upgradient side so that perimeter controls
can remain in place on the downgradient side. Use erosion control blankets, temporary
seeding, and/or mulch for stockpiles that will be inactive for an extended period.
■ Leave disturbed area of site in a roughened condition to limit erosion. Consider temporary
revegetation for areas of the site that have been disturbed but that will be inactive for an.
extended period.
■ Water to minimize dust but not to the point that watering creates runoff.
November 2010 Urban Drainage and Flood Control District CP-3
Urban Storm Drainage Criteria Manual Volume 3
SM-1 Construction Phasing/Sequencing (CP)
Project
Phase
BMPs
In Addition to the Above BMPs:
■ Close trench as soon as possible (generally at the end of the day).
Utility And
a Use rough -cut street control or apply road base for streets that will not be promptly paved.
Infrastructure
Installation
` Provide inlet protection as streets are paved and inlets are constructed.
■ Protect and repair BMPs, as necessary,
■ Perform street sweeping as needed.
In Addition to the Above BMPs:
■ Implement materials management and good housekeeping practices for home building
activities.
Building
Construction
4 Use perimeter controls for temporary stockpiles fiom foundation excavations.
■ For lots adjacent to streets, lot -line perimeter controls may be necessary at the back of
curb.
In Addition to the Above BMPs:
Final Grading
" Remove excess or waste materials.
■ Remove stored materials.
In Addition to the Above BMPs:
• Seed and mulch/tackify. .
Final
Stabilization
Seed and install blankets on steep slopes.
■ Remove all temporary BMPs when site has reached final stabilization.
CP-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Vehicle Tracking Control (VTC) SM-4
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 photograph VTC-1. A vehicle tracking control pad constructed with
frequent heavy vehicle traffic exits the properly sized rock reduces off -site sediment tracking.
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
November 2010 Urban Drainage and Flood Control District VTC-1
Urban Storm Drainage Criteria Manual Volume 3
SM-4 Vehicle Tracking Control (V Q
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.
Photograph VTC-2. A vehicle tracking control pad with wheel wash
facility. Photo courtesy of Tom Gore.
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.
VTC-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Vehicle Tracking Control (VTC) SM-4
VTC
20 FOOT
(WIDTH CAN BE
LESS IF CONST.
VEHICLES ARE
PHYSICALLY
CONFINED ON
BOTH SIDES)
SIDEWALK OR OTHER 50 FOOT (MIN.)
PAVED SURFACE
r
c
K
L f
roc 9" (MIN.)
si •y
yy
PUBLIC ' UNLESS OTHERWISE SPECIFIED
ROADWAY BY LOCAL JURISDICTION, USE
COOT SECT. J#703, AASHTO #3
COARSE AGGREGATE OR 6°
MINUS ROCK
NON —WOVEN GEOTEXTILE FABRIC
BETWEEN SOIL AND ROCK
INSTALL ROCK FLUSH WITH
OR BELOW TOP OF PAVEMENT
UNLESS OTHERWISE SPECIFIED BY LOCAL
JURISDICTION, USE COOT SECT. #703, AASHTO
#3 COARSE AGGREGATE
F9' (MIN.)
T
NON —WOVEN GEOTEXTILE
FABRIC
COMPACTED SUBGRADE --/ SECTION A
VTC-1. AGGREGATE VEHICLE TRACKING CONTROL
November 2010 Urban Drainage and Flood Control District VTC-3
Urban Storm Drainage Criteria Manual Volume 3
SM-4 Vehicle Tracking Control (VTQ
PUBLIC
ROADWj
NOTE: WASH WATER
MAY NOT CONTAIN
CHEMICALS OR SOAPS
WITHOUT OBTAINING
A SEPARATE PERMIT
TC
WW
DITCH TO CARRY
W
WASH WATER TO
1 67' MIN. _E
I
REINFORCED CONCRETE RA K }
(MAY SUBSTITUTE STEEL CATTLE DRAIN SPACE
GUARD FOR CONCRETE RACK)
SECTION A
VTC---2. AGGREGATE VEHICLE TRACKING CONTROL WITH
WASH RACK
VTC-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Vehicle Tracking Control (VT
EXISTING
PAVED
ROADWAY
0
0
CC
0
w
0-
0
z
t;
r
10% MAX,
SM-4
VTC VTC
CM TR
DISTURBED AREA,
CONSTRUCTION SITE,
STABILIZED STORAGE AREA
OR STAGING AREA
CONSTRUCTION MATS, WOVEN OR TRM
O'NO
rib Oil `Gi.
G "0 CONSTRUCTION MATS, WOVEN
OR TURF REINFORCEMENT
MAT (TRM)
18" MIN
SPIKES OR
STAKES ^�
TRM END OVERLAP WITH
SPIKES OR STAKES
STRAP
CONNECTORS
RESTRICT CONST. VEHICLE
ACCESS TO SIDES OF MAT
CONSTRUCTION MAT END
OVERLAP INTERLOCK WITH
STRAP CONNECTORS
20' OR AS REQUIRED
TO ACCOMMODATE
ANTICIPATED
TRAFFIC (WIDTH
CAN BE LESS IF
CONST, VEHICLES
ARE PHYSICALLY
CONFINED ON BOTH
SIDES)
VTC-3. VEHICLE TRACKING CONTROL WZ CONSTRUCTION
MAT OR TURF REINFORCEMENT MAT TRM
November 2010 Urban Drainage and Flood Control District VTC-5
Urban Storm Drainage Criteria Manual Volume 3
SM-4 Vehicle Tracking Control (VTC)
STA.81I_I7ED CONSTRUCTION ENTRANCE/EXIT INSTALLATI
1. SEE PLAN VIEW FOR
—LOCATION OF CONSTRUCTION ENTRANCES)/EXIT(S).
—TYPE OF CONSTRUCTION ENTRANCE(S)/EXITS(S) (WITH/WITHOUT WHEEL WASH,
CONSTRUCTION MAT OR TRM).
2. CONSTRUCTION MAT OR TRM STABILIZED CONSTRUCTION ENTRANCES ARE ONLY TO BE
USED ON SHORT DURATION PROJECTS (TYPICALLY RANGING FROM A WEEK TO A MONTH)
WHERE THERE WILL BE LIMITED VEHICULAR ACCESS.
3. A STABILIZED CONSTRUCTION ENTRANCE/EXIT SHALL BE LOCATED AT ALL ACCESS POINTS
WHERE VEHICLES ACCESS THE CONSTRUCTION SITE FROM PAVED RIGHT—OF—WAYS,
4. STABILIZED CONSTRUCTION ENTRANCE/EXIT SHALL BE INSTALLED PRIOR TO ANY LAND
DISTURBING ACTIVITIES.
5. A NON —WOVEN GEOTEXTILE FABRIC SHALL BE PLACED UNDER THE STABILIZED
CONSTRUCTION ENTRANCE/EXIT PRIOR TO THE PLACEMENT OF ROCK.
6. UNLESS OTHERWISE SPECIFIED BY LOCAL JURISDICTION, ROCK SHALL CONSIST OF DOT
SECT. #703, AASHTO #3 COARSE AGGREGATE OR 6" (MINUS) ROCK.
STABILIZED CONSTRUCTION ENTRANCE/EXIT MAINTENANCE NOTES
1. INSPECT BMPs EACH WORKDAY, AND MAINTAIN THEM IN EFFECTIVE OPERATING CONDITION.
MAINTENANCE OF BMPs SHOULD BE PROACTIVE, NOT REACTIVE, INSPECT BMPs AS SOON AS
POSSIBLE (AND ALWAYS WITHIN 24 HOURS) FOLLOWING A STORM THAT CAUSES SURFACE
EROSION, AND PERFORM NECESSARY MAINTENANCE,
2. FREQUENT OBSERVATIONS AND MAINTENANCE ARE NECESSARY TO MAINTAIN BMPs IN
EFFECTIVE OPERATING CONDITION. INSPECTIONS AND CORRECTIVE MEASURES SHOULD BE
DOCUMENTED THOROUGHLY.
3. WHERE BMPs HAVE FAILED, REPAIR OR REPLACEMENT SHOULD BE INITIATED UPON
DISCOVERY OF THE FAILURE.
4. ROCK SHALL BE REAPPLIED OR REGRADED AS NECESSARY TO THE STABILIZED
ENTRANCE/EXIT TO MAINTAIN A CONSISTENT DEPTH.
5. SEDIMENT TRACKED ONTO PAVED ROADS IS TO BE REMOVED THROUGHOUT THE DAY AND
AT THE END OF THE DAY BY SHOVELING OR SWEEPING, SEDIMENT MAY NOT BE WASHED
DOWN STORM SEWER DRAINS.
NOTE; MANY JURISDICTIONS HAVE BMP DETAILS THAT VARY FROM UDFCD STANDARD DETAILS.
CONSULT WITH LOCAL JURISDICTIONS AS TO WHICH DETAIL SHOULD BE USED WHEN
DIFFERENCES ARE NOTED.
(DETAILS ADAPTED FROM CITY OF BROOMFIELD. COLORADO, NOT AVAILABLE IN AUTOCAD)
VTC-6 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Stabilized Staging Area (SSA) SM-6
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 Photograph SSA-1. Example of a staging area with a gravel surface to
designated in SWMP drawings_ The layout prevent mud tracking and reduce runoff. Photo courtesy of Douglas
of the staging area may vary depending on CounLy.
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 constriction 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
November 2010 Urban Drainage and Flood Control District SSA-1
Urban Storm Drainage Criteria Manual Volume 3
SM-6 Stabilized Staging Area (SSA)
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.
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 witli vegetation or other surface
cover planned for the development.
SSA-2 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
Stabilized Staging Area (SSA) SM-6
SF/CF SF/CF
FF[7-,
ONSITE i
n CONSTRUCTION
n VEHICIE •`
CONSTRUCTION ,
SITE ACCESS , \
n
1�
1 I
STABILIZED
CONSTRUCTION
ENTRANCE (SEE
Y
DETAILS VTC-1
TO VTC-3)
PARKING (1F•
4
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U
N
MATERIAL •.
ST69AGE
AREA
S N
__-
SILT FENCE OR CONSTRUCTION
SF/CF SF/CF -1FENCING AS NEEDED
CONSTRUCTION
TRAILERS
S
3" MIN. THICKNESS
GRANULAR MATERIAL
EXISTING ROADWAY
SSA-1. STABILIZED STAGING AREA
TABIUZED STAGING A[�EA INSTALLATION NOr
1. SEE PLAN VIEW FOR
—LOCATION OF STAGING AREA(S).
—CONTRACTOR MAY ADJUST LOCATION AND SIZE OF STAGING AREA WITH APPROVAL
FROM THE LOCAL JURISDICTION.
2. STABILIZED STAGING AREA SHOULD BE APPROPRIATE FOR THE NEEDS OF THE SITE.
OVERSIZING RESULTS IN A LARGER AREA TO STABILIZE FOLLOWING CONSTRUCTION.
3, STAGING AREA SHALL BE STABILIZED PRIOR TO OTHER OPERATIONS ON THE SITE.
4. THE STABILIZED STAGING AREA SHALL CONSIST OF A MINIMUM 3" THICK GRANULAR
MATERIAL.
5. UNLESS OTHERWISE SPECIFIED BY LOCAL JURISDICTION, ROCK SHALL CONSIST OF DOT
SECT. #703, AASHTO #3 COARSE AGGREGATE OR 6" (MINUS) ROCK.
6. ADDITIONAL PERIMETER BMPs MAY BE REQUIRED INCLUDING BUT NOT LIMITED TO SILT
FENCE AND CONSTRUCTION FENCING,
FA8R 17F0 STAGING AREA MAINTENANCE NOTES
1. INSPECT BMPs EACH WORKDAY, AND MAINTAIN THEM IN EFFECTIVE OPERATING CONDITION.
MAINTENANCE OF BMPs SHOULD BE PROACTIVE, NOT REACTIVE. INSPECT BMPs AS SOON AS
POSSIBLE (AND ALWAYS WITHIN 24 HOURS) FOLLOWING A STORM THAT CAUSES SURFACE
EROSION, AND PERFORM NECESSARY MAINTENANCE,
2_ FREQUENT OBSERVATIONS AND MAINTENANCE ARE NECESSARY TO MAINTAIN BMPs IN
EFFECTIVE OPERATING CONDITION, INSPECTIONS AND CORRECTIVE MEASURES SHOULD BE
DOCUMENTED THOROUGHLY.
3, WHERE BMPs HAVE FAILED, REPAIR OR REPLACEMENT SHOULD BE INITIATED UPON
DISCOVERY OF THE FAILURE.
4, ROCK SHALL BE REAPPLIED OR REGRADED AS NECESSARY IF RUTTING OCCURS OR
UNDERLYING SUBGRADE BECOMES EXPOSED.
November 2010 Urban Drainage and Flood Control District SSA-3
Urban Storm Drainage Criteria Manual Volume 3
SM-6 Stabilized Staging Area (SSA)
5. STABILIZED STAGING AREA SHALL BE ENLARGED IF NECESSARY TO CONTAIN PARKING,
STORAGE, AND UNLOADING/LOADING OPERATIONS.
6. THE STABILIZED STAGING AREA SHALL BE REMOVED AT THE END OF CONSTRUCTION. THE
GRANULAR MATERIAL SHALL BE REMOVED OR, IF APPROVED BY THE LOCAL JURISDICTION,
USED ON SITE, AND THE AREA COVERED WITH TOPSOIL, SEEDED AND MULCHED OR
OTHERWISE STABILIZED IN A MANNER APPROVED BY LOCAL JURISDICTION.
NOTE: MANY MUNICIPALITIES PROHIBIT THE USE OF RECYCLED CONCRETE AS GRANULAR
MATERIAL FOR STABILIZED STAGING AREAS DUE TO DIFFICULTIES WITH RE-ESTABLISHMENT OF
VEGETATION IN AREAS WHERE RECYCLED CONCRETE WAS PLACED.
NOTE: MANY JURISDICTIONS HAVE BMP DETAILS THAT VARY FROM UDFCD STANDARD DETAILS.
CONSULT WITH LOCAL JURISDICTIONS AS TO WHICH DETAIL SHOULD BE USED WHEN
DIFFERENCES ARE NOTED.
(DETAILS ADAPTED FROM DOUGLAS COUNTY, COLORADO, NOT AVAILABLE IN AUTOCAD)
SSA-4 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3
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individual lots. Upon conveyance of 35-acre lot, the swales will be landscaped and maintained by
the individual home owner.
Water quality will be provided by erosion logs and/or straw bale barriers swales. Borrow ditch flows
range from 0.� to 2 cubic foot per second for the 10-year event. The Farmers Irrigation Company
diverts water into their laterals downstream of this project. Two additional ditches (Town of Silt and
the Lower Cactus Valley Ditch) also receive waters. Only in major storm event is water released
without being used by a ditch company. The emergency flow release is via a 30" pipe with a
dissipater and therefore little flows into the Colorado River.
C.3 Site Plan
See Page 4B Overall Site Map. A full set of Garfield County Building Dept Permitted Civil Plans
will be onsite in Contractor's trailer at all times as well as this SWMP.
Sheet C1
Driveway Plan and Profile (0+00 to 10+00)
Sheet C2
Driveway Plan and Profile (10+00 to 19+00)
Sheet C3
Driveway Plan and Profile (19+00 to 27+54)
C.4 Stormwater Management Controls
The following describes the site management controls that will be implemented in accordance
with typical Best Management Practices (BMP's).
SWMP Administrator
The Stormwater Management Plan Administrator is responsible for developing, implementing,
maintaining, and revising the SWMP. The activities and responsibilities of the administrator shall
address all aspects of the facility's SWMP. For Cougar Crossing, Chris Leverich will be representing
the Owner and Donnie Snidow (970) 986- 9678 will be the SWMP Administrator.
Identification of Potential Pollutant Sources
These sources have been more particularly described above in section C.2 Site Description.
Structural BMP's
Structural BMPs include sediment control fencing installed along the lower boundaries of the
excavation/grading areas. Certified weed free hay bales, check dams, silt dikes or erosion control
logs should be installed in channels, ditches and around culvert entrances in accordance with
Colorado Department of Transportation M-Standards. Surface roughening of exposed soils to
dissipate runoff energy and slow runoff velocity to aid in the prevention of soil erosion and promote
infiltration. Sediment control logs, curb socks or gravel bags placed flush in curb & gutter to slow
runoff velocity and promote sedimentation. Sediment control logs, rock socks or gravel bags
installed on grade to slow runoff velocity and promote sedimentation on the downhill side of semi -
hazardous areas such as portalettes and trash bins. These controls should be sufficient to mitigate
the sediment discharged into the existing system.
Stormwater Management Plan Page 5
' o�gar Crossing {Tract E I at Split)
�r _ .
_?~`- Subdbi400n Anprovemeaft
l NGNEER'S ESTIMATED COST
June 5, 2026
Quantity
Engineers Estimate
Item Description '
Unit Cost
Cost
I Mobilization
1 L.S.
$2,500
$2,500
2 Sediment Control Fence
1250 L.F.
$5
$6,250
3 Excavation (Cut, Fill & Compaction)
2000 CY
$10
$20,000
4 20' wide All Weather Private Drive Class 6 Base Course
980 CY
$110
$107,800
5 9+44 X-ing 3-24" Alumnz'd. Type 2 Corr'gtd Stl Pipe incBedding/Compct'n
80 LF
$200
$16,000
6 18+36 X-ing 3- 24" Almunz'd Type 2 Corr'gtd Stl Pipe inc/Bedding/Compcen
80 LF
$200
$16,000
7 25+50 X-ing 3-24" Alum'n'z'd Type 2 Corr'gtd Stl Pipe incBedding/Compct'
26 LF
$160
$4,160
8 24" Flared End Sections-inc/ Bedding & Compaction
12 EA
$1,250
$15,000
9 12" d50 Native Rip Rap on filter cloth
65 SY
$50
$3,250
10 "No Parking Fire Lane" signs
14 EA
$325
$4,550
11 Concrete filled steel bollard
3 EA
$750
$2,250
12 Revegetation
1 LS
$10,000
$10,000
13 Weed Control (Spring application and 2 spot treatments
1 LS
$6,500
$6,500
14 Erosion Logs
500 EA
$15
$51000
15 Construction staking
1 LS
$5,000
$5,000
Subtotal
$221,760
10% SIA Multiplier
$22,176
TOTAL
$243,936
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