23 erosion control details - westbradford.org
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Civil EngineeringLand PlanningEnvironmental
DLHowell
www.DLHowell.com
1250 Wrights LaneWest Chester, PA 19380Phone: (610) 918-9002Fax: (610) 918-9003
STANDARD CONSTRUCTION DETAIL #3-16PUMPED WATER FILTER BAG
STANDARD CONSTRUCTION DETAIL #11-1EROSION CONTROL BLANKET INSTALLATION
STANDARD CONSTRUCTION DETAIL #4-6ROCK FILTER OUTLET
STANDARD CONSTRUCTION DETAIL #6-1VEGETATED CHANNEL
CHANNELNO. STATIONS
BOTTOMWIDTH
B(FT)
DEPTHD
(FT)
TOPWIDTH
W(FT)
Z1(FT)
Z2(FT) LINING *
1 ALL 5 1.25 10 3 3 NAG SC150BN2 ALL 4 1.0 8 3 3 NAG SC150BN3 ALL 4 1.0 8 3 3 NAG SC150BN4 ALL 4 1.0 8 3 3 NAG SC150BN5 ALL 4 1.25 9 3 3 NAG SC150BN
STANDARD CONSTRUCTION DETAIL #7-14BAFFLE
BASINOR
TRAPNO.
BAFFLE TEMPORARYRISER BOTTOM
LENGTHBal(FT)
HEIGHTBah(FT)
CREST ELEV.TRCE(FT)
BOTTOMELEV
BE(FT)
BASIN 1 150 5 548.73 546.00TRAP 1 50 3 564.05 562.00TRAP 2 50 4 561.01 558.50
STANDARD CONSTRUCTION DETAIL #7-2SKIMMER ATTACHED TO PERMANENT RISER
BASINNO.
WATERSURFACE
ELEV.WSE(FT)
SKIMMERORIFICE ARM FLEXIBLE HOSE
DIA.(IN)
HEAD(IN)
DIA.SAd(IN)
LENGTHSAL(FT)
MAT'LDIA.(IN)
LENGTH(IN) MAT'L
BASIN 1 548.73 2.5 3.0 3 4 PVC 3 12 PVCTRAP 1 564.05 2.0 2.0 2 3 PVC 2 12 PVCTRAP 2 561.01 2.0 2.0 2 4 PVC 2 12 PVC
TEMPORARY STUB PERMANENT RISER RISER EXTENSION BARREL
INSIDEDIA(IN)
INVERTELEVTSIE(FT)
MAT'L
CRESTELEVPSCE(FT)
HORIZ OPENING CRESTELEVTRE(FT)
HORIZ OPENING INLETELEVBIE(FT)
LENGTHEl
(IN)
WIDTHEw(IN)
LENGTH(IN)
WIDTH(IN)
3 544.00 PVC 550.00 48 24 548.73 48 24 544.002 561.00 PVC 563.50 48 24 564.05 48 24 561.002 558.50 PVC 560.50 48 24 561.01 48 24 558.50
STANDARD CONSTRUCTION DETAIL #7-4SEDIMENT BASIN EMBANKMENT AND SPILLWAY DETAILS - SKIMMER
BASIN/TRAP
NO.
Z1(FT)
Z2(FT)
TEMPRISEREXT.ELEVTRE(FT)
EMBANKMENT CLEANOUTELEVCOE(FT)
BOTTOMELEV
BE(FT)
TOPELEVETE(FT)
TOPWIDTH
ETw(FT)
KEYTRENCHDEPTH
(FT)
KEYTRENCHWIDTH
(FT)BASIN 1 3 3 548.73 552.25 10 2 4 547.00 546.00TRAP 1 3 3 564.05 565.50 10 2 4 563.00 562.00TRAP 2 3 3 561.01 562.55 10 2 4 559.71 558.50
SKIMMER OUTLET BARREL
DIASAd(IN)
LENGTHSAi(FT)
MAT'LDIABd(IN)
INLETELEV BIE
(FT)MAT'L
LENGTHBl
(FT)
OUTLETELEV BOE
(FT)
2.5 4.0 PVC 18 544.00 RCP 50 543.002.0 3.0 PVC 15 561.00 RCP 50 560.002.0 4.0 PVC 15 558.50 RCP 50 558.00
STANDARD CONSTRUCTION DETAIL #7-13SEDIMENT BASIN EMERGENCY SPILLWAY WITH TRM LINING
BASINNO.
WEIR LINING CHANNEL DISSIPATOR
Z3(FT)
Z4(FT)
TOPELEVWTE(FT)
CRESTELEVWCE(FT)
WIDTHWw(FT)
TRMTYPE
STAPLEPATTERN
Z5(FT)
DEPTHCd
(FT)
LENGTHDI
(FT)
WIDTHDw(FT)
RIPRAPSIZE(R-_)
RIPRAPTHICK.
DRt(IN)
BASIN 1 3 3 552.25 550.65 50 P300 B 3 .5 5.5 10.5 3 9
STANDARD CONSTRUCTION DETAIL #7-3SKIMMER WITH STONE LANDING BERM
STANDARD CONSTRUCTION DETAIL #7-5TRASH RACK AND ANTI-VORTEX DEVICE
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CLIENT:
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PROJECT:
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LOCATION:
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REV.
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DATE
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DESCRIPTION
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DATE:
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SCALE:
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DRAWN BY:
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CHECKED BY:
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PROJECT NO.:
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CAD FILE:
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PLOTTED:
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DRAWING NO.:
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SHEET
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OF
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1
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2
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3
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4
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5
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8
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05/07/2021
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REVISED PER TOWNSHIP REVIEW LETTER DATED 03/23/21
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UNITED SPORTS TRAINING CENTER, LLC.
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1426 MARSHALLTON-THORNDALE ROAD
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WEST BRADFORD TOWNSHIP
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WEST BRADFORD TWNSHP, CHESTER CO., PA.
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PRELIMINARY/FINAL
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EROSION CONTROL DETAILS
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03/12/2021
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JTE
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JWB
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2977A
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05/07/2021
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29
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N.T.S.
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05 EROSION CONTROL PLAN.dwg
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C05.4
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23
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COPYRIGHT 2016 D.L. HOWELL & ASSOCIATES, INC. - ALL RIGHTS RESERVED. THESE PLANS ARE THE PROPERTY OF D.L. HOWELL & ASSOCIATES, INC. ANY USE OR REPRODUCTION OF THESE PLANS IN WHOLE OR PART, WITHOUT THE WRITTEN PERMISSION OF D.L. HOWELL & ASSOCIATES, INC. IS FORBIDDEN.2016 D.L. HOWELL & ASSOCIATES, INC. - ALL RIGHTS RESERVED. THESE PLANS ARE THE PROPERTY OF D.L. HOWELL & ASSOCIATES, INC. ANY USE OR REPRODUCTION OF THESE PLANS IN WHOLE OR PART, WITHOUT THE WRITTEN PERMISSION OF D.L. HOWELL & ASSOCIATES, INC. IS FORBIDDEN. D.L. HOWELL & ASSOCIATES, INC. - ALL RIGHTS RESERVED. THESE PLANS ARE THE PROPERTY OF D.L. HOWELL & ASSOCIATES, INC. ANY USE OR REPRODUCTION OF THESE PLANS IN WHOLE OR PART, WITHOUT THE WRITTEN PERMISSION OF D.L. HOWELL & ASSOCIATES, INC. IS FORBIDDEN.
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Q:\CIVIL 3D JOBS\2977A\2977A PRODUCTION PLANS\SHEET SET\SUBDIVISION & LD\05 EROSION CONTROL PLAN.DWG
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FILTREXX SEDIMENT CONTROLS
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CONTACT: JAMES WEAVER JAMES WEAVER WEAVER'S MULCH STRASBURG ROAD, COATESVILLE, PA 19320 PHONE: 610-383-6818
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%%UCOMPOST SOCK WASHOUT DETAIL
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NOT TO SCALE
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NOTES: 1. WASHOUT FACILITIES SHOULD NOT BE PLACED WITHIN 50 FEET OF STORM DRAINS, OPEN DITCHES, OR WASHOUT FACILITIES SHOULD NOT BE PLACED WITHIN 50 FEET OF STORM DRAINS, OPEN DITCHES, OR SURFACE WATERS. 2. WASHOUT FACILITIES SHOULD BE IN A CONVENIENT LOCATION FOR THE TRUCKS, PREFERABLY NEAR THE WASHOUT FACILITIES SHOULD BE IN A CONVENIENT LOCATION FOR THE TRUCKS, PREFERABLY NEAR THE PLACE WHERE THE CONCRETE IS BEING POURED, BUT FAR ENOUGH FROM OTHER VEHICULAR TRAFFIC TO MINIMIZE THE POTENTIAL FOR ACCIDENTAL DAMAGE OR SPILLS. WHEREVER POSSIBLE, THEY SHOULD BE LOCATED ON SLOPES NOT EXCEEDING A 2% GRADE. 3. COMPOST SOCKS SHOULD BE STAKED IN THE MANNER RECOMMENDED BY THE MANUFACTURER AROUND COMPOST SOCKS SHOULD BE STAKED IN THE MANNER RECOMMENDED BY THE MANUFACTURER AROUND PERIMETER OF THE GEOMEMBRANE SO AS TO FORM A RING WITH THE ENDS OF THE SOCK LOCATED AT THE UPSLOPE CORNER. CARE MUST BE TAKEN TO ENSURE CONTINUOUS CONTACT OF THE SOCK WITH THE GEOMEMBRANE AT ALL LOCATIONS. WHERE NECESSARY, SOCKS MAY BE STACKED AND STAKED SO AS TO FORM A TRIANGULAR CROSS-SECTION. 4. PROPER SIGNAGE SHOULD BE PROVIDED TO DRIVERS SO THAT THEY ARE AWARE OF THE PRESENCE OF PROPER SIGNAGE SHOULD BE PROVIDED TO DRIVERS SO THAT THEY ARE AWARE OF THE PRESENCE OF WASHOUT FACILITIES.
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24" DIAMETER COMPOST FILTER SOCK
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MAXIMUM DEPTH OF CONCRETE WASHOUT WATER IS 50% OF FILTER RING HEIGHT
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2"x2"x36" WOOD STAKES PACED 5' O.C.
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DIRECT CONCRETE WASHOUT WATER INTO FILTER BAG
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24" DIAMETER COMPOST FILTER SOCK 4' MIN. OVERLAP ON UPSLOPE SIDE OF FILTER RING
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2"x2"x36" WOOD STAKES PACED 5' O.C.
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NOTES: 1. INSTALL ON FLAT GRADE INSTALL ON FLAT GRADE FOR OPTIMUM PERFORMANCE 2. 18" DIA. FILTER SOCK 18" DIA. FILTER SOCK MAY BE STACKED ONTO DOUBLE 24" DIAMETER SOCKS IN PYRAMIDAL CONFIGURATION FOR ADDED HEIGHT.
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SECTION N.T.S.
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FILTER BAG
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WELL VEGETATED, GRASSY AREA
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WELL VEGETATED, GRASSY AREA
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FILTER BAG
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INTAKE HOSE
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PUMP
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DISCHARGE HOSE
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CLAMPS
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CLAMPS
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DISCHARGE HOSE
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PUMP
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INTAKE HOSE
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HEAVY DUTY LIFTING STRAPS (RECOMMENDED)
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PLAN VIEW
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ELEVATION VIEW
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NOT TO SCALE
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NOTES: LOW VOLUME FILTER BAGS SHALL BE MADE FROM NON-WOVEN GEOTEXTILE MATERIAL SEWN WITH HIGH STRENGTH, DOUBLE STITCHED "J" TYPE SEAMS. THEY SHALL BE CAPABLE OF TRAPPING PARTICLES LARGER THAN 150 MICRONS. HIGH VOLUME FILTER BAGS SHALL BE MADE FROM WOVEN GEOTEXTILES THAT MEET THE FOLLOWING STANDARDS:
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A SUITABLE MEANS OF ACCESSING THE BAG WITH MACHINERY REQUIRED FOR DISPOSAL PURPOSES SHALL BE PROVIDED. FILTER BAGS SHALL BE REPLACED WHEN THEY BECOME 1/2 FULL OF SEDIMENT. SPARE BAGS SHALL BE KEPT AVAILABLE FOR REPLACEMENT OF THOSE THAT HAVE FAILED OR ARE FILLED. BAGS SHALL BE PLACED ON STRAPS TO FACILITATE REMOVAL UNLESS BAGS COME WITH LIFTING STRAPS ALREADY ATTACHED. BAGS SHALL BE LOCATED IN WELL-VEGETATED (GRASSY) AREA, AND DISCHARGE ONTO STABLE, EROSION RESISTANT AREAS. WHERE THIS IS NOT POSSIBLE, A GEOTEXTILE UNDERLAYMENT AND FLOW PATH SHALL BE PROVIDED. BAGS MAY BE PLACED ON FILTER STONE TO INCREASE DISCHARGE CAPACITY. BAGS SHALL NOT BE PLACED ON SLOPES GREATER THAN 5%. FOR SLOPES EXCEEDING 5%, CLEAN ROCK OR OTHER NON-ERODIBLE AND NON-POLLUTING MATERIAL MAY BE PLACED UNDER THE BAG TO REDUCE SLOPE STEEPNESS. NO DOWNSLOPE SEDIMENT BARRIER IS REQUIRED FOR MOST INSTALLATIONS. COMPOST BERM OR COMPOST FILTER SOCK SHALL BE INSTALLED BELOW BAGS LOCATED IN HQ OR EV WATERSHEDS, WITHIN 50 FEET OF ANY RECEIVING SURFACE WATER OR WHERE GRASSY AREA IS NOT AVAILABLE. THE PUMP DISCHARGE HOSE SHALL BE INSERTED INTO THE BAGS IN THE MANNER SPECIFIED BY THE MANUFACTURER AND SECURELY CLAMPED. A PIECE OF PVC PIPE IS RECOMMENDED FOR THIS PURPOSE. THE PUMPING RATE SHALL BE NO GREATER THAN 750 GPM OR 1/2 THE MAXIMUM SPECIFIED BY THE MANUFACTURER, WHICHEVER IS LESS. PUMP INTAKES SHALL BE FLOATING AND SCREENED. FILTER BAGS SHALL BE INSPECTED DAILY. IF ANY PROBLEM IS DETECTED, PUMPING SHALL CEASE IMMEDIATELY AND NOT RESUME UNTIL THE PROBLEM IS CORRECTED.
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PROPERTY
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TEST METHOD
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MINIMUM STANDARD
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AVG. WIDE WIDTH STRENGTH
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ASTM D-4884
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60 LB/IN
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GRAB TENSILE
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ASTM D-4632
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205 LB
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PUNCTURE
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ASTM D-4833
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110 LB
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MULLEN BURST
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ASTM D-3786
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350 PSI
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UV RESISTANCE
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ASTM D-4355
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70%
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AOS % RETAINED
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ASTM D-4751
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80 SIEVE
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NOT TO SCALE
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NOTES: SEED AND SOIL AMENDMENTS SHALL BE APPLIED ACCORDING TO THE RATES IN THE PLAN DRAWINGS PRIOR TO INSTALLING THE BLANKET. PROVIDE ANCHOR TRENCH AT TOE OF SLOPE IN SIMILAR FASHION AS AT TOP OF SLOPE. SLOPE SURFACE SHALL BE FREE OF ROCKS, CLODS, STICKS, AND GRASS. BLANKET SHALL HAVE GOOD CONTINUOUS CONTACT WITH UNDERLYING SOIL THROUGHOUT ENTIRE LENGTH. LAY BLANKET LOOSELY AND STAKE OR STAPLE TO MAINTAIN DIRECT CONTACT WITH SOIL. DO NOT STRETCH BLANKET. THE BLANKET SHALL BE STAPLED IN ACCORDANCE WITH THE MANUFACTURER'S RECOMMENDATIONS. BLANKETED AREAS SHALL BE INSPECTED WEEKLY AND AFTER EACH RUNOFF EVENT UNTIL PERENNIAL VEGETATION IS ESTABLISHED TO A MINIMUM UNIFORM 70% COVERAGE THROUGHOUT THE BLANKETED AREA. DAMAGED OR DISPLACED BLANKETS SHALL BE RESTORED OR REPLACED WITHIN 4 CALENDAR DAYS.
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BLANKET EDGES STAPLED AND OVERLAPPED (4 IN. MIN.)
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INSTALL BEGINNING OF ROLL IN 6 IN. x 6 IN. ANCHOR TRENCH, STAPLE, BACKFILL AND COMPACT SOIL
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STARTING AT TOP OF SLOPE, ROLL BLANKETS IN DIRECTION OF WATER FLOW
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PREPARE SEED BED (INCLUDING APPLICATION OF LIME, FERTILIZER AND SEED) PRIOR TO BLANKET INSTALLATION
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REFER TO MANUF. RECOMMENDED STAPLING PATTERN FOR STEEPNESS AND LENGTH OF SLOPE BEING BLANKETED
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THE BLANKET SHOULD NOT BE STRETCHED; IT MUST MAINTAIN GOOD SOIL CONTACT
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OVERLAP BLANKET ENDS 6 IN. MIN. WITH THE UPSLOPE BLANKED OVERLYING THE DOWNSLOPE BLANKET (SHINGLE STYLE). STAPLE SECURELY.
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NOT TO SCALE
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1 MIN.
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1 MIN.
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1 MIN.
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OPTIONAL 6 IN. COMPOST LAYER FIRMLY ANCHORED
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OPTIONAL 6 IN. SUMP
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AASHTO NO. 57 6 IN. MIN
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R-3 ROCK
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WOOD POSTS
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HEIGHT OF ROCK FILTER=5/6 HEIGHT OF STRAW BALES OR FILTER FABRIC FENCE
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AASHTO NO. 57
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STRAW BALES OR FILTER FABRIC
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OUTLET CROSS-SECTION
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UP-SLOPE FACE
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NOTES: A ROCK FILTER OUTLET SHALL BE INSTALLED WHERE FAILURE OF A SILT FENCE OR STRAW BALE BARRIER HAS OCCURRED DUE TO CONCENTRATED FLOW. ANCHORED COMPOST LAYER SHALL BE USED ON UPSLOPE FACE IN HQ AND EV WATERSHEDS. SEDIMENT SHALL BE REMOVED WHEN ACCUMULATIONS REACH 1/3 THE HEIGHT OF THE OUTLET.
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%%UYARD DRAIN PROTECTION DETAIL
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NO SCALE
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NOTE: SEDIMENT MUST BE REMOVED FROM STORM WATER INLET PROTECTION AFTER EACH RUNOFF EVENT
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RUN-OFF WATER
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RUN-OFF WATER
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NOT TO SCALE
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SOIL BACKFILL
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LONGITUDINAL ANCHOR TRENCH
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OVERLAP 6 IN. MIN.
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OVERCUT CHANNEL 2 IN. TO ALLOW BULKING DURING SEED BED PREPARATION
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EXCAVATE CHANNEL TO DESIGN GRADE AND CROSS SECTION
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DESIGN DEPTH
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PREPARE SOIL AND APPLY SEED BEFORE INSTALLING BLANKETS, MATS, OR OTHER TEMPORARY CHANNEL LINER SYSTEM.
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SHINGLE-LAP SPLICED ENDS OR BEGIN NEW ROLL IN AN INTERMITTENT CHECK SLOT MIN. SHINGLE LAP=6 IN.
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FLOW
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Z2
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1
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Z1
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1
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LINING *
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* SEE MANUFACTURER'S LINING INSTALLATION DETAIL FOR STAPLE PATTERNS, VEGETATIVE STABILIZATION FOR SOIL AMENDMENTS, SEED MIXTURES AND MULCHING INFORMATION
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LONGITUDINAL ANCHOR TRENCH
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(LOOKING DOWNSTREAM)
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ISOMETRIC VIEW
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CHANNEL CROSS-SECTION
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INTERMITTENT CHECK SLOT
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LONGITUDINAL ANCHOR TRENCH
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NOTES: ANCHOR TRENCHES SHALL BE INSTALLED AT BEGINNING AND END OF CHANNEL IN THE SAME MANNER AS LONGITUDINAL ANCHOR TRENCHES. CHANNEL DIMENSIONS SHALL BE CONSTANTLY MAINTAINED. CHANNEL SHALL BE CLEANED WHENEVER TOTAL CHANNEL DEPTH IS REDUCED BY 25% AT ANY LOCATION. SEDIMENT DEPOSITS SHALL BE REMOVED WITHIN 24 HOURS OF DISCOVERY OR AS SOON AS SOIL CONDITIONS PERMIT ACCESS TO CHANNEL WITHOUT FURTHER DAMAGE. DAMAGED LINING SHALL BE REPAIRED OR REPLACED WITHIN 48 HOURS OF DISCOVERY. NO MORE THAN ONE THIRD OF THE SHOOT (GRASS LEAF) SHALL BE REMOVED IN ANY MOWING. GRASS HEIGHT SHALL BE MAINTAINED BETWEEN 2 AND 3 INCHES UNLESS OTHERWISE SPECIFIED. EXCESS VEGETATION SHALL BE REMOVED FROM PERMANENT CHANNELS TO ENSURE SUFFICIENT CHANNEL CAPACITY.
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NOT TO SCALE
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4 IN. X 4 IN. PRESSURE TREATED WOOD POSTS OR EQUIV. METAL
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4 FT X 8 FT X 3/4 IN. EXTERIOR GRADE PLYWOOD, SHEET METAL OR EQUIV. MATERIAL
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TRCE
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BE
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NOTES: SEE APPROPRIATE BASIN DETAIL FOR PROPER LOCATION AND ORIENTATION. AN ACCEPTABLE ALTERNATIVE IS TO INSTALL A SUPER SILT FENCE AT THE BAFFLE LOCATION IN POOLS WITH DEPTHS EXCEEDING 7', THE TOP OF THE PLYWOOD BAFFLE DOES NOT NEED TO EXTEND TO THE TEMPORARY RISER CREST. SUPER SILT FENCE BAFFLES NEED NOT EXTEND TO TRCE ELEVATION. BAFFLES SHALL BE TIED INTO ONE SIDE OF THE BASIN UNLESS OTHERWISE SHOWN ON THE PLAN DRAWINGS. SUBSTITUTION OF MATERIALS NOT SPECIFIED IN THIS DETAIL SHALL BE APPROVED BY THE DEPARTMENT OR THE LOCAL CONSERVATION DISTRICT BEFORE INSTALLATION. DAMAGED OR WARPED BAFFLES SHALL BE REPLACED WITHIN 7 DAYS OF INSPECTION. BAFFLES REQUIRING SUPPORT POSTS SHALL NOT BE INSTALLED IN BASINS REQUIRING IMPERVIOUS LINERS.
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VENT
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WATER SURFACE ELEVATION (WSE) AT TOP OF DEWATERING ZONE
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WATER ENTRY UNIT
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ARM (DEWATERING TUBE)
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SKIMMER ARM DIAMETER (SAd)
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PERMANENT STRUCTURE CREST ELEVATION (PSCE)
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TRASH RACK
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TEMP RISER EXTENSION ELEVATION (TRE)
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TEMPORARY RISER EXTENSION*
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PERMANENT RISER STRUCTURE
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BARREL WATER TIGHT SEALS ALL JOINTS
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TEMPORARY STUB
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FLEXIBLE HOSE SECURELY CLAMPED TO TEMPORARY STUB
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STONE BERM
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CLEAN-OUT ELEVATION (COE)
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AASHTO NO. 57 STONE
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STUB INLET ELEV. (TSIE)
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BARREL INLET ELEV. (BIE)
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NOT TO SCALE
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WATER SURFACE
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NOTES: ALL ORIFICES ON PERMANENT RISER BELOW TEMPORARY RISER EXTENSION SHALL HAVE WATER-TIGHT TEMPORARY SEALS PROVIDED. TEMPORARY STUB INVERT ELEVATION SHALL BE SET AT OR BELOW SEDIMENT CLEAN-OUT ELEVATION. A ROPE SHALL BE ATTACHED TO THE SKIMMER ARM TO FACILITATE ACCESS TO THE SKIMMER ONCE INSTALLED. SKIMMER SHALL BE INSPECTED WEEKLY AND AFTER EACH RUNOFF EVENT. ANY MALFUNCTIONING SKIMMER SHALL BE REPAIRED OR REPLACED WITHIN 24 HOURS OF INSPECTION. ICE OR SEDIMENT BUILDUP AROUND THE PRINCIPAL SPILLWAY SHALL BE REMOVED SO AS TO ALLOW THE SKIMMER TO RESPOND TO FLUCTUATING WATER ELEVATIONS. SEDIMENT SHALL BE REMOVED FROM THE BASIN WHEN IT REACHES THE LEVEL MARKED ON THE SEDIMENT CLEAN-OUT STAKE OR THE TOP OF THE STONE BERM. SEE STANDARD CONSTRUCTION DETAIL #7-3 FOR CONFIGURATION OF STONE BERM.
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SECTION VIEW
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EMBANKMENT TOP ELEVATION (ETE)
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COE
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TRE
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PSCE
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NOT TO SCALE
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TEMP. RISER EXTENSION
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TRASH RACK
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STONE BERM
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ARM
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SKIMMER
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FLEXIBLE HOSE
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TEMP. STUB
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PERM. OUTLET STRUCTURE
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BIE
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WATERTIGHT SEALS ALL JOINTS
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BARREL OUTLET (BOE)
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ENERGY DISSIPATOR
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ANTI-SEEP COLLARS
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CORE
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KEY
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TRENCH
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SHELL
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BASIN BOTTOM ELEVATION (BE)
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WSE
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1
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Z1
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Z2
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NOTES: SEDIMENT BASINS, INCLUDING ALL APPURTENANT WORKS, SHALL BE CONSTRUCTED TO THE DETAIL AND DIMENSIONS SHOWN ON THE E&S PLAN DRAWINGS. AREA UNDER EMBANKMENT SHALL BE CLEARED, GRUBBED, AND STRIPPED OF TOPSOIL TO A DEPTH OF TWO FEET PRIOR TO ANY PLACEMENT AND COMPACTION OF EARTHEN FILL. IN ORDER TO FACILITATE MAINTENANCE AND RESTORATION, THE POOL AREA SHALL BE CLEARED OF ALL BRUSH, TREES, AND OBJECTIONABLE MATERIAL. FILL MATERIAL FOR THE EMBANKMENTS SHALL BE FREE OF ROOTS, OR OTHER WOODY VEGETATION, ORGANIC MATERIAL, LARGE STONES, AND OTHER OBJECTIONABLE MATERIALS. THE EMBANKMENT SHALL BE COMPACTED IN LAYERED LIFTS OF NOT MORE THAN 6 TO 9 IN. THE MAXIMUM ROCK SIZE SHALL BE NO GREATER THAN 2/3 THE LIFT THICKNESS. UPON COMPLETION, THE EMBANKMENT SHALL BE SEEDED, MULCHED, BLANKETED OR OTHERWISE STABILIZED ACCORDING TO THE SPECIFICATIONS OF THE E&S PLAN DRAWINGS. TREES SHALL NOT BE PLANTED ON THE EMBANKMENT. INSPECT ALL SEDIMENT BASINS ON AT LEAST A WEEKLY BASIS AND AFTER EACH RUNOFF EVENT. PROVIDE ACCESS FOR SEDIMENT REMOVAL AND OTHER REQUIRED MAINTENANCE ACTIVITIES. A CLEAN OUT STAKE SHALL BE PLACED NEAR THE CENTER OF EACH BASIN. ACCUMULATED SEDIMENT SHALL BE REMOVED WHEN IT HAS REACHED THE CLEAN OUT ELEVATION ON THE STAKE AND THE BASIN RESTORED TO ITS ORIGINAL DIMENSIONS. DISPOSE OF MATERIALS REMOVED FROM THE BASIN IN THE MANNER DESCRIBED IN THE E&S PLAN. BASIN EMBANKMENTS, SPILLWAYS, AND OUTLETS SHALL BE INSPECTED FOR EROSION, PIPING AND SETTLEMENT. NECESSARY REPAIRS SHALL BE IMMEDIATELY. DISPLACED RIPRAP WITHIN THE OUTLET ENERGY DISSIPATER SHALL BE REPLACED IMMEDIATELY. ACCUMULATED SEDIMENT SHALL BE REMOVED AND DISTURBED AREAS SHALL BE STABILIZED INSIDE THE BASIN BEFORE CONVERSION TO A STORMWATER MANAGEMENT FACILITY. THE DEVICE SHOWN IN STANDARD CONSTRUCTION DETAIL #7-16 MAY BE USED TO DEWATER SATURATED SEDIMENT PRIOR TO ITS REMOVAL. ROCK FILTERS SHALL BE ADDED AS NECESSARY. ALL BASIN EMBANKMENTS SHOULD BE COMPACTED BY SHEEPSFOOT OR PAD ROLLER. THE LOOSE LIFT THICKNESS SHOULD BE 9 INCHES OR LESS, DEPENDING ON ROLLER SIZE, AND THE MAXIMUM PARTICLE SIZE IS 6 INCHES OR LESS - 2/3 LIFT THICKNESS. FIVE PASSES OF THE COMPACTION EQUIPMENT OVER THE ENTIRE SURFACE OF EACH LIFT IS REQUIRED. EMBANKMENT COMPACTION TO VISIBLE NON-MOVEMENT IS ALSO REQUIRED..
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NOT TO SCALE
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WTE
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WCE
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Z3
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Z4
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1
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1
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EMBANKMENT INTERIOR SLOPE
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EMBANKMENT EXTERIOR SLOPE
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BASIN BOTTOM
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X
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X
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Z
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Z
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TOP OF EMBANKMENT
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EMERGENCY SPILLWAY
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ANCHOR TRENCH
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SIDE SLOPE Z4
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SIDE SLOPE Z3
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KEY TRENCH
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TRM
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TOE OF SLOPE
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OVERLAPPED TERMINAL END OF TRM
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Z
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Z
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WTE
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WCE
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Z5
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1
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NON-WOVEN GEOTEXTILE
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RIPRAP OUTLET DISSIPATOR
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SEE KEY TRENCH DETAIL
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TRENCH END INTO INTERIOR SLOPE PER MANUFACTURER TRENCHING DETAILS
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TRM LINING
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WEIR SECTION Z-Z
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PLAN VIEW RIPRAP OUTLET DISSIPATOR
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KEY TRENCH AT TOE OF SLOPE OF SPILLWAY
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EMBANKMENT SECTION ALONG EMERGENCY SPILLWAY SECTION X-X
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NOTES: HEAVY EQUIPMENT SHALL NOT CROSS OVER SPILLWAY WITHOUT PRECAUTIONS TAKEN TO PROTECT TRM LINING. DISPLACED LINER WITHIN THE SPILLWAY AND/OR OUTLET CHANNEL SHALL BE REPLACED IMMEDIATELY. RIPRAP AT TOE OF EMBANKMENT SHALL BE EXTENDED A SUFFICIENT LENGTH IN BOTH DIRECTIONS TO PREVENT SCOUR. THE USE OF BAFFLES THAT REQUIRE SUPPORT POSTS ARE RESTRICTED FROM USE IN BASINS REQUIRING IMPERVIOUS LINERS.
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AASHTO NO. 57 STONE
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TRASH RACK
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FLEXIBLE HOSE
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PERMANENT OUTLET STRUCTURE
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OUTLET BARREL
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DEWATERING FACILITY
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WATER ENTRY UNIT
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FLOAT
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ARM
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VENT
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TEMPORARY RISER EXTENSION
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STONE
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BERM
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NOTES: NO GUIDE RAILS SHALL BE REQUIRED FOR THIS INSTALLATION. THIS DETAIL SHALL BE USED IN CONJUNCTION WITH STANDARD CONSTRUCTION DETAILS #7-2 AND #7-4.
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PLAN VIEW
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NOT TO SCALE
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NOT TO SCALE
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ANTI-VORTEX DEVICE
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D
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OUTLET
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d
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RISER
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INTERSECTION OF THE BARS.
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L
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d/2
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d/2
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T - THICKNESS OF RISER PIPE
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D - DIAMETER OF RISER PIPE
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d - DIAMETER OF OUTLET PIPE
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d/2
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L = D + d + 2T
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d/2
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D
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L/4
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#4 BARS (TYP) WELDED TO
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THE ANGLES AND AT EACH
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L/4
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L
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L/4
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L/4
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L/4
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L/4
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d/2
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d/2
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2d
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d/2
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L/4
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L
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L/4
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T
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T
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STEEL PLATE
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(3/16 IN. THICKNESS)
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d/2
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d
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d