iswm construction control standard details...trench or per x 6" inch blanket in a 6" end...
TRANSCRIPT
Created: January 2018
Addendum to: iSWM Technical Manual – Construction Controls The following are a selection of 10 iSWM construction control BMP schematics chosen to be provided in standard details.
1. Rock Check Dams 2. Temporary Erosion Control Blankets 3. Dewatering Controls 4. Filter Tube Curb Inlet Protection 5. Hog Wire Weir Curb Inlet Protection 6. Curb Rock Sock On-Grade Curb Inlet Protection 7. Filter Tube Area Inlet Protection 8. Sediment Basin with Overflow Riser 9. Silt Fence 10. Stabilized Construction Exit
iSWM Construction Control Standard Details
ROCK CHECK DAM VIEW LOOKING UPSTREAMN.T.S.
N.T.S.
N.T.S.
SPACE BETWEEN ROCK CHECK DAMS
1.5'
FLOW2
L
TOE OF CHECK DAM TOP OF CHECK DAM
SAME ELEVATION
CONSTRUCTION CONTROLSiSWM™ TECHNICAL MANUAL
CROSS SECTION A-A
211
2
LENGTHWEIR
A
A
MIN.2'
1/2 D
D
1/2 D
DOWNSTREAM DAM SHALL BE AT THE SAME ELEVATION AS TOE OF UPSTREAM DAM-SPACING OF CHECK DAMS BASED ON GRADE OF THE SWALE OR DITCH. TOP OF
CONDITIONS-HEIGHT OF CHECK DAMS (D) BASED ON SWALE OR DITCH DIMENSIONS AND FLOW
DOCUMENT THE FOLLOWING PARAMETERS USED TO DESIGN THE CHECK DAM.CONDITIONS IN THE DRAINAGE SWALE OR DITCH. PROVIDE CALCULATIONS THAT ACTUAL DIMENSIONS OF THE CHECK DAMS SHALL BE DESIGNED BASED ON FLOW NOTES:
FIGURE 2.1 STANDARD CONSTRUCTION DETAIL - ROCK CHECK DAMS (1 OF 2)
1.5D (MIN.)
REVISED CHECK DAM
FILTER FABRIC
9"-36"
11
1FILTER FABRIC
ROCK CHECK DAM GENERAL NOTES:
CONSTRUCTION CONTROLSiSWM™ TECHNICAL MANUAL
FIGURE 2.1 NOTES ON ROCK CHECK DAM (2 OF 2)
AN APPROVED MANNER.DAM AND ACCUMULATED SILT SHALL BE REMOVED AND DISPOSED OF IN EROSION OR SEDIMENT CONTROL DEVICE IS EMPLOYED, THE CHECK 5. WHEN THE SITE HAS ACHIEVED FINAL STABILIZATION OR ANOTHER
BE REMOVED AND DISPOSED OF PROPERLY.OF THE CHECK DAM OR ONE FOOT, WHICHEVER IS LESS, THE SILT SHALL 4. WHEN SILT REACHES A DEPTH EQUAL TO ONE-THIRD OF THE HEIGHT
WASHOUT, CONSTRUCTION TRAFFIC DAMAGE, ETC.AS INTENDED DUE TO SILT ACCUMULATION AMONG THE ROCKS, AND SHALL BE REPLACED WHEN THE STRUCTURE CEASES TO FUNCTION 3. THE CHECK DAM SHALL BE INSPECTED AS SPECIFIED IN THE SWPPP INCHES IN DIAMETER DEPENDING ON EXPECTED FLOWS.2. STONE SHALL BE WELL GRADED WITH SIZE RANGE FROM 1 1/2 TO 3 1/2
CHECK DAM (ROCK).1. SEE NCTCOG STANDARD SPECIFICATIONS (2017), SECTION 202.9
REVISEDCHECK DAM
SHEET FLOW
N.T.S.
CONSTRUCTION CONTROLSiSWM™ TECHNICAL MANUAL
3' MIN.
3' MIN.
3'
EROSION CONTROL BLANKET
4 INCH MINIMUM SIDE OVERLAP
N.T.S.
ECB OVERLAP EXAMPLE
ECB ISOMETRIC PLAN VIEW
MANUFACTURER
SPACING RECOMEMENDED BY
THROUGHOUT ECB AT
EACH SLOPE CHANGE, AND
CENTER AT END OF ECB AT
STAPLES (TYP.) 12 INCH ON
NOT CHANNELS
PROTECTION,
FOR SLOPE
3' MIN.
LITERATURE.
ECB, OR PER MANUFACTURER
OVERLAP ON TOP OF LOWER
HIGHER ELEVATION SHALL
ENDS OF BLANKETS. ECB AT
3 FOOT MINIMUM OVERLAP AT
REVISEDEROSION CONTROL BLANKET
TEMPORARY EROSION CONTROL BLANKETS (1 OF 2)
FIGURE 2.7 STANDARD CONSTRUCTION DETAIL -
LITERATURE
MANUFACTURER
TRENCH OR PER
X 6" INCH
BLANKET IN A 6"
END OF THE
UP-CHANNEL
BURY THE
CONSTRUCTION CONTROLSiSWM™ TECHNICAL MANUAL
EROSION CONTROL BLANKETS GENERAL NOTES:
6. INSPECTION SHALL BE AS SPECIFIED IN THE SWPPP.
JOINTS, AND FLUSHNESS OF THE STAPLES WITH THE GROUND. CHECKED FOR UNIFORM CONTACT WITH THE SOIL, SECURITY OF THE LAP 5. AFTER APPROPRIATE INSTALLATION, THE BLANKETS SHOULD BE
WIRE STAPLES, 6-INCHES IN LENGTH AND 1-INCH WIDTH WILL BE USED.4. IN ABSENCE OF MANUFACTURE'S LITERATURE, A MINIMUM 11-GUAGE
MATERIAL.PARTICULAR ATTENTION MUST BE PAID TO JOINTS AND OVERLAPPING LITERATURE FOR THE APPROVED EROSION CONTROL BLANKET. RECOMMENDATIONS SHOWN WITHIN THE MANUFACTURER'S PUBLISHED 3. INSTALLATION AND ANCHORING SHALL CONFORM TO THE
SLOPE.INSTALLATION AREA, EXCEPT FOR SMALL AREAS WITH LESS THAN 2% TRENCHING SHALL BE LOCATED ALONG THE ENTIRE PERIMETER OF THE DIRECT CONTACT WITH THE SOIL SHALL BE REMOVED. ANCHOR OBSTRUCTIONS THAT WOULD PREVENT THE BLANKET FROM LYING IN ALL ROCKS, DIRT CLODS, STUMPS, ROOTS, TRASH AND ANY OTHER 2. PRIOR TO THE INSTALLATION OF ANY EROSION CONTROL BLANKETS,
1. SEE NCTCOG STANDARD SPECIFICATIONS (2017) SECTION 202.15.
FIGURE 2.7 NOTES ON TEMPORARY EROSION CONTROL BLANKETS (2 OF 2)
REVISED EROSION CONTROL BLANKET
THE DRAWINGS.
FILTER BAGS ON
LOCATIONS OF
SHOW
WATER
PUMPED FILTER BAG
CONTAINMENT
SEDIMENT
FLOW
FILTERED WATER FLOW
FILTERED WATER FLOW
CONSTRUCTION CONTROLSiSWM™ TECHNICAL MANUAL
N.T.S.
SEDIMENT FILTER BAG PLAN VIEWN.T.S.
SEDIMENT FILTER BAG PROFILE
SEWN IN SPOUT
TO SPOUT
HOSE SECURED
PUMP DISCHARGE
PUMP
PUMP DISCHARGE HOSESEDIMENT CONTAINMENT FILTER BAGWATER TO BE PUMPED
SIPHON HOSE PLACED IN
RECOMMENDATIONS)
(PER MANUFACTURERS
PROTECT FILTER BAG
UNDERLAYMENT TO
OTHER PREPARED
MULCH, STRAW, OR
ESTABLISHED GRASS,
COURSE AGGREGATE,
REVISED DEWATERING CONTROLS
FIGURE 3.4 STANDARD CONSTRUCTION DETAIL - DEWATERING CONTROLS
DEWATERING CONTROL GENERAL NOTES:
LITERATURE.AND PUMPS SHOULD CONFORM TO PUBLISHED MANUFACTURER 2. CAPACITY, INSTALLATION, MAINTENANCE , AND REMOVAL OF BAGS
D-4751.THAT MEETS ASTM CRITERIA-D4632 , D4833, D-3786, D-4355, D-4491, AND 1. THE BAG SHOULD BE A NON-WOVEN, NEEDLE-PUNCHED, GEOTEXTILE
CURB
INLET
CURB
OPENING
MIN. NO.
BLOCKS
4'-6'
8'-10'
12'-14'
16'-20'
1
2
3
4
ALTERNATIVE FORM FOR TYPE A
CURB INLET PROTECTION
CROSS SECTIONPLAN VIEW
TYPE A CURB INLET PROTECTION
PLAN VIEW
CROSS SECTION
1. DOUBLE WRAP OF FLEXIBLE
WIRE MESH WITH MESH
OPENING 3/4" MAX., OR
2. PLASTIC NETTING DOUBLE
WRAPPED WITH 1/2" MAX.
OPENING, OR
3. GEOSYNTHETIC TUBES
NOTE: PLASTIC OR
WIRE TIES AROUND
WIRE OR PLASTIC
MESH EVERY
12"-18" OR MORE
AS NEEDED.
MATERIAL
OR MULCH FILTER
" FILTER STONE 211
WIRE FABRIC
4"X4" WELDED
CURB
INLET
STD. CMU BLOCK
ON BOTH SIDES
END OF CURB OPENING
24" MIN. BEYOND
FILTER MATERIAL
EXTENDED WRAPPED
ON BOTH SIDES
END OF CURB OPENING
24" MIN. BEYOND
FILTER MATERIAL
EXTENDED WRAPPED
2" GAP
BETWEEN TOP
OF WRAPPED
FILTER AND
TOP OF INLET
OPENING
202.14 AND 202.18
SPECIFICATIONS (2017), SECTION
NOTE: SEE NCTCOG STANDARD
CONSTRUCTION CONTROLSiSWM™ TECHNICAL MANUAL
REVISEDINLET PROTECTION
12"
APPROVED BY CITY
STREETS UNLESS
ACTIVE CITY
NOT ALLOWED ON
PLACED WHEN LOCATED ON AN ACTIVE STREET.
NOTE: VERTICAL PANEL BARRICADES TO BE
FILTER TUBE CURB INLET PROTECTION
FIGURE 3.6 STANDARD CONSTRUCTION DETAIL -
VARIES
INLET
18''
CUT AWAY OF
FILTER FABRIC
EXTEND 2'-0'' MINIMUM BEYOND
INLET OPENING AT EACH END. 3'' OVERLAP AT
FABRIC SPLICES.
MINIMUM 2'' HIGH
CLEAR OPENING
(SEE TABLE EC1)
2''X4''-W1.4XW1.4
FLOW
FLOW
18" MIN.
OVERLAP
12"18"
STRUCTURE.WIRE FABRIC
N.T.S.
HOG WIRE WEIR CURB INLET PROTECTION CROSS SECTION
N.T.S.
HOG WIRE WEIR CURB INLET PROTECTION ISOMETRIC VIEW
ROCK BAGS @3' O.C.
ROCK BAGS @3' O.C.
CONSTRUCTION CONTROLSiSWM™ TECHNICAL MANUAL
REVISED INLET PROTECTION
REFERENCE: NCTCOG STANDARD SPECIFICATIONS (2017), SECTION 202.14
HOG WIRE WEIR CURB INLET PROTECTION (1 OF 2)
FIGURE 3.7 STANDARD CONSTRUCTION DETAIL -
FILTER STONE
FILLED WITH 1 1/2"
ROCK BAGS
APPROVED BY CITY
STREETS UNLESS
ACTIVE CITY
NOT ALLOWED ON
WHEN AN ENGINEER HAS DETERMINED THERE IS ADEQUATE STORAGE OR POSITIVE OVERFLOW.
NOTE: THIS CONTROL WILL DECREASE THE CAPACITY OF THE INLET. IT SHALL ONLY BE USED
CURBCURB
SIDEWALK
STORM SEWER INLET
18"
18"
12" MIN.
ROCK BAGS SHALL BE EVENLY SPACED
ALONG TOP AND ALONG THE FRONT OF
INLET.
N.T.S.
INLET
OPENINGOF ROCK BAGS
TOP FRONT
5'
10'
15'
20'
MINIMUM NUMBER
2
3
3
4
3
3
4
4
18"
FLOW
12"
TABLE EC1
HOG WIRE WEIR CURB INLET PROTECTION PLAN VIEW
INLET PROTECTIONS SHALL BE REMOVED AS SOON AS THE SOURCE OF SEDIMENT IS STABILIZED.3.
INSPECTION SHALL BE MADE BY THE CONTRACTOR AND SILT ACCUMULATION MUST BE REMOVED WHEN DEPTH REACHES 2".2.
FABRIC MUST BE SECURED TO WIRE BACKING WITH CLIPS OR HOG RINGS AT THIS LOCATION.
A SECTION OF FILTER FABRIC SHALL BE REMOVED AS SHOWN ON THIS DETAIL TO PROVIDE A 2" MINIMUM CLEAR OPENING. 1.
NOTES:
CONSTRUCTION CONTROLSiSWM™ TECHNICAL MANUAL
REVISEDINLET PROTECTION
HOG WIRE WEIR CURB INLET PROTECTION (2 OF 2)
FIGURE 3.7 STANDARD CONSTRUCTION DETAIL -
INLET BOX
TOP OF
FLOW
CONSTRUCTION CONTROLSiSWM™ TECHNICAL MANUAL
CURB
FLOW
OVER-
3'-5' TYP.
5' MIN.
ENCLOSED IN WIRE MESH
1 1/2" CRUSHED ROCK
4" TO 6" MAX AT CURBS
2" IN SOILOR HARD SURFACE,0" ON BEDROCK
ENCLOSED IN WIRE MESH
1 1/2" CRUSHED ROCK
WIRE TIE ENDS
ROCK SOCK SECTIONN.T.S. N.T.S.
ROCK SOCK PLAN
CURB ROCK SOCK ON-GRADE CURB INLET PROTECTION DETAILN.T.S.
CURB ROCK SOCK ON-GRADE CURB INLET PROTECTION (1 OF 2)
FIGURE 3.9 STANDARD CONSTRUCTION DETAIL -
ROCK SOCK
ROCK SOCK
2' MAX
SURFACE
GROUND
PAVEMENT OR
REVISEDROCK SOCK
30 DEGREESAPPROXIMATE
CONSTRUCTION CONTROLSiSWM™ TECHNICAL MANUAL
CURB ROCK SOCK ON-GRADE CURB INLET PROTECTION (2 OF 2)
FIGURE 3.9 STANDARD CONSTRUCTION DETAIL -
CURB ROCK SOCK ON-GRADE CURB INLET PROTECTION GENERAL NOTES:
5. MINIMUM OF 2 CURB ROCK SOCKS.
4. MAXIMUM ROCK SOCK DIAMETER 4" TO 6".
3. ROCK SOCKS MAY BE USED ON PAVED OR UNPAVED SURFACES.
INTO AN ACTIVE TRAVEL LANE.2. DO NOT INSTALL ON INLETS WHERE THE ROCK SOCKS WOULD EXTEND LOW POINT) TO TRAP SEDIMENT.1. THIS DETAIL IS INTENDED FOR USE WITH ON-GRADE INLETS (NOT A
REVISED ROCK SOCK
12"
MINIM
UM
2"
EROSION CONTROL LOG
CONTROL LOG.
SIDE OF EROSION
MATERIAL ON UPHILL
PLACE EXCAVATED
UNDERCUTTING.
SOIL TO PREVENT
NOTE: COMPACT EXCAVATED
24" 24" MINIMUM
OVERLAP ENDS TIGHTLY
DIRECTED
STAKE AS
OF LOG TO
SECURE END
FLOWFLOW
EROSION CONTROL LOG
AREA DRAIN INLETS WITH
DRAINAGE ACCESS TO
COMPLETELY SURROUND
INLET
DROP
IN PLACE (TYPICAL)
HOLD
LOG AS NEEDED TO
ON DOWNHILL SIDE OF
SANDBAGS
STAKE OR USE
(12 " MIN.)
CONTROL LOG
TEMP. EROSION
INLET
"Y"
MINIMUM
12" DIAMETER
MIN.
1" - 2"
TUBE)
THROUGH THE
(AS SHOWN OR
2' TO 4' LONG.
or #3 REBAR,
2" x 2" WOOD
CONSTRUCTION CONTROLSiSWM™ TECHNICAL MANUAL
WOOD STAKES
METAL OR
6" MIN.
WOOD STAKES
METAL OR
SPECIFIED ON PLAN
*DIAMETER = XX" AS
FILTER TUBE
SPECIFIED ON PLAN
*DIAMETER = XX" AS
FILTER TUBE
REVISEDINLET PROTECTION
FIGURE 3.13 STANDARD CONSTRUCTION DETAIL - FILTER TUBE AREA INLET PROTECTION
INLET PROTECTION PLAN VIEWFILTER TUBE AREA
N.T.S.
PROTECTION CROSS SECTIONFILTER TUBE "Y" INLET
N.T.S.
FOR FILTER TUBEEMBEDMENT EXAMPLE
N.T.S.
PROTECTION CROSS SECTIONFILTER TUBE DROP INLET
N.T.S.
TRENCHBEDDING1 1/2 " -2"
TRENCHBEDDING1 1/2 " -2"
NOTE: SEE NCTCOG STANDARD SPECIFICATIONS (2017), SECTION 202.18
21
31
CONSTRUCTION CONTROLSiSWM™ TECHNICAL MANUAL
A A
ANCHOR BLOCK
EARTH BERM
ACCEPTABLE MATERIAL
MATTINGS OR OTHER
STABILIZATION - RIP RAP,
RISER
DEWATERING
OUTFALL PIPE
CLAY BERM
COMPACTED
HIGH FLOW OUTLET
ELEVATION
SPILLWAY
EMERGENCY1' MIN.
1' MAX.
1' MAX.
DESIGN CAPACITY
DESIGN HIGH WATER
CROSS SECTION A-AN.T.S.
PLAN VIEWN.T.S.
6' MIN.
OUTLET
STABILIZED
VEGETATION
PERMANENT
TEMPORARY OR
STABILIZED WITH
EMBANKMENT
INSTALLATIONREQUIRED FOR EACH CONTROL PLANS IS THE EROSION INFORMATION ON *SPECIFIC DESIGN
REQUIREDCOMPUTATION
DESIGN
REVISED SEDIMENT BASIN
(AS NEEDED)BLOCKSDISSIPATION ENERGY CONCRETE
EMERGENCY SPILLWAY
REFERENCE: NCTCOG iSWM CRITERIA MANUAL FOR SITE DEVELOPMENT AND CONSTRUCTION, SECTION 3.9 SEDIMENT BASIN.
SEDIMENT BASIN WITH OVERFLOW RISER
FIGURE 3.20 STANDARD CONSTRUCTION DETAIL -
SLOPE TO DRAIN
OR FLATTER.SLOPES SHOULD 3:1 MAY VARY. SIDE NECESSARY, SHAPE FOR STORAGE AS EXCAVATED AREA
CONSTRUCTION CONTROLSiSWM™ TECHNICAL MANUAL
FLOW
TRENCH
SILT FENCE
(MIN. HEIGHT
24" ABOVE
EXIST. GROUND)
COMPACTED EARTH
6" MIN.
STEEL FENCE POST
BACKING SUPPORT4x4-W1.4xW1.4 MINIMUMALLOWABLE, TYP. CHAIN
LINK FENCE FABRIC IS
ACCEPTABLE
WIRE MESH
6" MIN.
12"
FABRIC TOE-IN
H
1/2 H
8' MAX.
5' MIN.
EACH SIDE
SILT FENCE
1 1/2" FILTER
STONE
FLOW
12"
ISOMETRIC PLAN VIEWN.T.S.
SILT FENCE OVERFLOW STRUCTUREN.T.S.
FENCE
SIDE OF SILT
STONE, EACH
6" MIN. TOP OF
MAX. 6' SPACING,
MIN. EMBEDMENT=1'
BACKFILL
REVISED SILT FENCE
FIGURE 3.28 STANDARD CONSTRUCTION DETAIL - FOR SILT FENCE (1 OF 2)
CONSTRUCTION CONTROLSiSWM™ TECHNICAL MANUAL
SILT FENCE GENERAL NOTES:
REVISED SILT FENCE
10. SEE NCTCOG STANDARD SPECIFICATIONS (2017), SECTION 202.5
TO ADDITIONAL SILTATION.AT AN APPROVED SITE AND IN SUCH A MANNER AS TO NOT CONTRIBUTE OF HALF THE HEIGHT OF THE FENCE. THE SILT SHALL BE DISPOSED OF 9. ACCUMULATED SILT SHALL BE REMOVED WHEN IT REACHES A DEPTH
EMPLOYED.ACHIEVED OR ANOTHER EROSION OR SEDIMENT CONTROL DEVICE IS 8. SILT FENCE SHALL BE REMOVED WHEN FINAL STABILIZATION IS
REPLACEMENT SHALL BE MADE PROMPTLY AS NEEDED.7. INSPECTION SHALL BE AS SPECIFIED IN THE SWPPP. REPAIR OR
WHERE ENDS OF FABRIC MEET.POST. THERE SHALL BE A 3 FOOT OVERLAP, SECURELY FASTENED POST OR TO WIRE BACKING, WHICH IN TURN IS ATTACHED TO THE FENCE 6. SILT FENCE SHOULD BE SECURELY FASTENED TO EACH SUPPORT
AND BACKFILLED WITH COMPACTED MATERIAL.WIDE TO ALLOW FOR THE SILT FENCE FABRIC TO BE LAID IN THE GROUND 5. THE TRENCH MUST BE A MINIMUM OF 6 INCHES DEEP AND 6 INCHES
TRENCH IS FLAT AND PERPENDICULAR TO THE LINE OF FLOW.OR MECHANICAL TRENCHER, SO THAT THE DOWNSLOPE FACE OF THE 4. THE TOE OF THE SILT FENCE SHALL BE TRENCHED IN WITH A SPADE
BE EMBEDDED A MINIMUM OF ONE FOOT.SLIGHT ANGLE TOWARD THE ANTICIPATED RUNOFF SOURCE. POST MUST 3. POST WHICH SUPPORT THE SILT FENCE SHALL BE INSTALLED ON A
LENGTHS SHALL BE A MINIMUM OF 10 FEET.SILT FENCE IS TO BE TURNED UPSLOPE AT THE ENDS. UPSLOPE 2. DESIGNER SHALL SHOW ON THE DRAWINGS THE LOCATIONS WHERE
APPROXIMATELY 300 FEET WHERE NO LOW POINT IS APPARENT.STRUCTURES ARE REQUIRED AT ALL LOW POINTS AND AT A SPACING OF OVERFLOW STRUCTURES SHALL BE INSTALLED. OVERFLOW 1. DESIGN SHALL SHOW ON THE DRAWINGS THE LOCATIONS WHERE
FIGURE 3.28 NOTES FOR SILT FENCE (2 OF 2)
CONSTRUCTION CONTROLSiSWM™ TECHNICAL MANUAL
STABILIZATION AND STREET PAVED SURFACE
LENGTH AS SHOWN ON PLANS
GRADE TO PREVENT RUNOFF
FROM LEAVING SITE
EXISTING GRADE
PAVED SURFACE
TRANSITION TO
R.O.W.
6" MIN.
FILTER FABRIC
RADIUS
= 5' MIN.
DRAINAGE MUST FLOW
AWAY FROM ENTRANCE
GRADE TO DRAIN AWAY FROM
PAVED SURFACE
PROFILE VIEWN.T.S.
PLAN VIEWN.T.S.
LEAVE THE SITE AND ENTER ROADWAYS
STORM WATER IS NOT ALLOWED TO
ENTRACE MUST BE SLOPED SO THAT
LENGTH (MIN. 50')
W
30' MIN. FOR > 5 AC SITES
20' MIN. FOR < 5 AC SITES
WIDTH (W)
FIGURE 3.29 STANDARD CONSTRUCTION DETAIL - STABILIZED CONSTRUCTION EXIT (1 OF 2)
REVISED STABILIZED CONSTRUCTION EXIT
CONSTRUCTION CONTROLSiSWM™ TECHNICAL MANUAL
STABILIZED CONSTRUCTION ENTRANCE GENERAL NOTES:
FIGURE 3.29 NOTES FOR STABILIZED CONSTRUCTION EXIT (2 OF 2)
REVISED STABILIZED CONSTRUCTION EXIT
9. INSPECTION SHALL BE SPECIFIED IN THE SWPPP.
CONSTRUCTION SITE.A DRAINAGE SWALE TO PREVENT RUNOFF FROM LEAVING THE 8. THE ENTRANCE MUST BE PROPERLY GRADED OR INCORPORATE SURFACES MUST BE REMOVED IMMEDIATELY.SPILLED, DROPPED, WASHED, OR TRACKED ONTO PAVED ADDITIONAL STONE AS CONDITIONS DEMAND. ALL SEDIMENT SURFACES. THIS MAY REQUIRE PERIODIC TOP DRESSING WITH WILL PREVENT TRACKING OR FLOWING OF SEDIMENT ONTO PAVED 7. THE ENTRANCE SHALL BE MAINTAINED IN A CONDITION WHICH DRAIN, DITCH OR WATERCOURSE USING APPROVED METHODS.SEDIMENT SHALL BE PREVENTED FROM ENTERING ANY STORM FROM BOTH THE STREET AND THE STABILIZED ENTRANCE. ALL WITH CRUSHED STONE WITH DRAINAGE FLOWING AWAY WASHING IS REQUIRED, IT SHALL BE DONE ON AN AREA STABILIZED SEDIMENT PRIOR TO ENTRANCE ONTO A PUBLIC ROADWAY. WHEN 6. WHEN NECESSARY, VEHICLES SHALL BE CLEANED TO REMOVE GREATER THAN 5 AC, AT ALL POINTS OF INGRESS OR EGRESS.5. THE WIDTH SHALL BE NO LESS THAN 20' FOR SITES LESS THAN 5 AC, AND 30' FOR SITES LENGTH OF 50 FEET.4. LENGTH SHALL BE SHOWN ON PLANS, WITH A MINIMUM CEMENT CONCRETE ALLOWED.3. STONE SHALL BE 3 TO 5 INCH DIAMETER COURSE AGGREGATE, NO CRUSHED PORTLAND
2. THE THICKNESS SHALL NOT BE LESS THAN 6 INCHES. 1. SEE NCTCOG STANDARD SPECIFICATIONS (2017), SECTION 202.11