SW6180801_Plansheet C-16 SCM Detail_20180829

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6 248FES#50047 LF 18" RCP @ 1.00%RS#501FES#200FES#300STORM DRAINAGE TABLEINLET#500501TYPEFESRSROADWAYNONE.NONE.RIM ELEV(EOP)255.32258.00INV IN(FROM-SIZE)253.53(501-18")INV OUT(TO-SIZE)254.00(500-18")ENGINEERINGCurry205 S. Fuquay AvenueFuquay-Varina, NC 27526(919) 552-0849(919) 552-2043CURRY ENGINEERSNORTH CAROL
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NA EST.10NC LIC. NO. P-0799TFZ:\PROJECTS FOLDER-ZEBULON\2018\2018-002 ADAMS-SURLES SUBDIVISION - ANGIER\PLANS\CONSTRUCTION DRAWINGS\SHEET FILES\C-16 SCM PLAN AND SECTIONS II.DWGPLOTTED: 8/29/2018 2:17 PM PROFESSIONAL'S SEALDATE:FILE NO.HORZ. SCALE:ORIG. SHEET SIZE:REVISIONS 24 x 36STATUSCONSULTANTCLIENTCONSTRUCTION DRAWINGSKATHRYN'S RETREAT SUBDIVISIONJUNE 22, 20182018-002FINAL PERMIT DRAWINGSYTTE SEAL36823NANNGIDREWEEEPS.R SARTHPRONOFESCROLINAIONAL
Little Cross, LLC8625 Mt. Pleasant Church RoadWillow Springs, NC 27592Contact: Hugh Surles919.422.7066 (m)[e-mail] (e)A7/20/2018TOWN OF ANGIER COMMENTSB8/24/2018USACE/NCDEQ DWRC8/28/2018NCDEQ STORMWATER COMMENTS/RFI SCM PLAN AND SECTIONS IIC-161" = 80'NOTES:1.ALL CONSTRUCTION SHALL BE IN ACCORDANCE WITH NCDENR AND TOWN OF ANGIER STANDARDS AND SPECIFICATIONS.2.CONTRACTOR SHALL COORDINATE ALL GRADING OPERATIONS WITH THE OWNER'S GEOTECHNICAL ENGINEER, AS APPROPRIATE.3.CONTRACTOR IS RESPONSIBLE FOR VERIFYING ALL GRADES PRIOR TO THE START OF CONSTRUCTION.4.MAXIMUM SLOPE OF BASIN IS 3:15.ALL SIDE SLOPES, EMBANKMENTS AND SPILLWAYS SHALL BE COMPACTED TO A MINIMUM OF 95% STANDARD PROCTOR PER ASTM D-698.6.CONTROLLED FILL AS SPECIFIED BY THE ENGINEER IN THE DAM EMBANKMENT SHALL BE PLACED IN 6-INCH LOOSE LAYERS (3-INCH LOOSE LAYERS WITHIN 3 FEET OF EITHER SIDE OFTHE PRINCIPLE SPILLWAY PIPE TO A DEPTH OF 2-FEET OVER THE PIPE) AND SHALL BE COMPACTED TO A DENSITY OF NO LESS THAN 95% OF STANDARD PROCTOR MAXIMUM DRYDENSITY AT OPTIMUM MOISTURE CONTENT OR WITHIN 2%± IN ACCORDANCE WITH ASTM D698.7.ALL VISIBLE ORGANIC DEBRIS SUCH AS ROOTS AND LIMBS SHALL BE REMOVED FROM THE FILL MATERIAL PRIOR TO COMPACTION TO THE REQUIRED DENSITY. SOILS WITH ORGANICMATTER CONTENT EXCEED 5% BY WEIGHT SHALL NOT BE USED. STONES GREATER THAN 3-INCH (IN ANY DIRECTION) SHALL BE REMOVED FROM THE FILL PRIOR TO COMPACTION.8.FILL MATERIAL PLACED AT DENSITIES LOWER THAN MINIMUM SPECIFIED DENSITIES OR AT MOISTURE CONTENTS OUTSIDE THE SPECIFIED RANGES OR OTHERWISE NOT CONFORMINGTO SPECIFIED REQUIREMENTS SHALL BE REMOVED AND REPLACED WITH ACCEPTABLE MATERIALS.9.ANY FILL LAYER THAT IS SMOOTH DRUM ROLLED TO REDUCE MOISTURE PENETRATION DURING A STORM EVENT SHALL BE PROPERLY SCARIFIED PRIOR TO THE PLACEMENT OF THENEXT SOIL LEVEL.10.SURFACE WATER AND STREAM FLOW SHALL BE CONTINUOUSLY CONTROLLED THROUGHOUT CONSTRUCTION AND THE PLACEMENT OF THE CONTROLLED FILL.11.FOUNDATION AREAS MAY REQUIRE UNDERCUTTING OR COMPRESSIBLE AND/OR UNSUITABLE SOILS. ALL SUCH UNDERCUTTING SHALL BE PERFORMED AT THE DISCRETION OF THEGEOTECHNICAL ENGINEER AND SHALL BE MONITORED AND DOCUMENTED. IN NO CASE SHALL THERE BE AN ATTEMPT TO STABILIZE ANY PORTIONS OF THE FOUNDATION SOILS WITHCRUSHED STONE.12.TREATMENT OF SEEPAGE AREAS, SUBGRADE PREPARATIONS, FOUNDATION DEWATERING, AND ROCK FOUNDATION PREPARATION MAYBE REQUIRED AT THE DISCRETION OF THEGEOTECHNICAL ENGINEER.13.FILL ADJACENT TO THE RISER AND PRINCIPAL SPILLWAY PIPE SHALL BE PLACED SO THAT LIFTS ARE AT THE SAME LEVEL ON BOTH SIDES OF THE STRUCTURE.14.EARTHWORK COMPACTION WITHIN 3-FT OF ANY STRUCTURES SHALL BE ACCOMPLISHED BY MEANS OF HAND TAMPERS, MANUALLY DIRECTED POWER TAMPERS OR PLATECOMPACTORS OR MINIATURE SELF PROPELLED ROLLERS.15.COMPACTION BY MEANS OF DROP WEIGHTS FROM A CRANE OR HOIST SHALL NOT BE PERMITTED.16.HEAVY EQUIPMENT SHALL NOT BE ALLOWED TO PASS OVER CAST-IN-PLACE STRUCTURES UNTIL ADEQUATE CURING TIME HAS ELAPSED.17.TO RE-ESTABLISH VEGETATION AFTER CONSTRUCTION, A 2 TO 3-INCH LAYER OF TOPSOIL SHALL BE PLACED ON THE DISTURBED EMBANKMENT SURFACE AND THE AREA SEEDED ANDMULCHED OR HYDROSEEDED.18.ALL RISER STRUCTURES, INCLUDING WEIR WALL TYPE STRUCTURES, SHALL BE REINFORCED CONCRETE. BRICK/CONCRETE BLOCK AND MORTAR TYPE STRUCTURES WILL NOT BEACCEPTED.19.ALL RISER STRUCTURES SHALL BE LOCATED SUCH THAT DIRECT ACCESS FROM THE DAM EMBANKMENT CAN BE ACHIEVED.20.RISER STRUCTURES WITH MULTIPLE BARREL SECTIONS SHALL HAVE GASKETTED JOINTS, AND EACH SECTION SHALL BE BOLTED TO ADJACENT SECTIONS WITH STAINLESS STEELSTRAPS. STEEL STRAPS SHALL BE MINIMUM 4" WIDE, 1/4" THICK, STRAP CENTERED ON JOINT WITH MINIMUM 2" OVERLAP. ATTACH STRAP TO BARREL SECTIONS WITH (2) 1/2"HEXBOLTS EMBEDDED IN STRUCTURE 3 INCHES. EPOXY BOLTS INTO STRUCTURE.21.CLAY LINER SHALL BE A MINIMUM 8 INCHES THICK. CLAY LINER SHALL BE INSTALLED AT A DEPTH SUFFICIENT ENOUGH SUCH THAT IT DOES NOT IMPEDED THE GROWTH OFVEGETATION OR CAN BE PENETRATED BY ROOTS OF VEGETATION. CLAY LINER SHALL LIMIT INFILTRATION RATE TO 0.01 IN/HR. CLAY LINER SHALL BE INSTALLED UP TO PERMANENTPOOL ELEVATION THROUGHOUT POND. ALTERNATIVE LINERS MAYBE ACCEPTABLE IF APPROVED BY ENGINEER OF RECORD.22.REFER TO L-03 FOR VEGETATED SHELF PLANTINGS. ALL AREAS NOT PLANTED SHALL BE STABILIZED WITH GRASS.23.CONTRACTOR SHALL SUBMIT SHOP DRAWINGS FOR APPROVAL TO ENGINEER OR OWNER FOR CHAIN LINK FENCE PRIOR TO INSTALLATION.SCALE:5C-16EMERGENCY SPILLWAY DETAILN.T.S.3,000 PSI CONCRETENO.3 STIRRUPS @ 12" O.C.NO.5 REBAR @ 12" O.C.12" TYP3" CLR3" CLRNOTES:1.CONCRETE DESIGN & CONSTRUCTION SHALL BE IN ACCORDANCE WITH LATESTEDITION OF ACI SPECIFICATIONS. CONCRETE SHALL BE A MINIMUM OF 3,000PSI WITH #3 STIRRUPS AT 12" O.C.2.CONTRACTOR SHALL FINISH ALL CONCRETE SURFACES WITH BROOM.3.REINFORCING SHALL BE ASTM 615, GR 60. SPLICE LENGTHS SHALL BE CLASS B.50'CREST LENGTHTOP OF DAMELEV = 260.50SPILLWAYELEV = 259.30NO.3 STIRRUPS @ 12" O.C.NO.5 REBAR @ 12" O.C.BOTTOMELEV = 256.801
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18" GASKETTED O-RINGRCP OUTLET PIPEANTI-VORTEX TRASH RACKANCHORED TO RISER.CONTRACTOR TO SUBMIT SHOPDRAWINGS PRIOR TOINSTALLATION. ANCHOR TOCONCRETE RISER IN 4 LOCATIONS.MANHOLESTEPS, TYPCREST = 258.00INV = 254.00BOTTOM = 251.3312"DRAW DOWNORIFICEINV = 254.004"x4" PVC TEE4" PLUGSET TOP OF PVC PLUG ATTEMPORARY POOLDRILL 2.5" ØOPENING IN 4" PLUGTOP OFBERM = 260.50FILL WITH LEAN CONCRETEFROM INVERT OF OUTLET PIPETO MANHOLE EXTENDED BASE(4) 8" DIAMETER ORIFICEKNOCKOUTSINV ELEV= 256.00BOTTOM OF PONDELEV = 248.00PERMANENT POOL = 254.00TEMPORARY POOL = 256.00STANDARDMANHOLE BASESCALE:4C-16CONCRETE RISER DETAILN.T.S.6"60" DIAMETERPRE-CASTMANHOLE24"24"NOTES:1. CONTRACTOR SHALL INSTALL FILTER DIAPHRAGM ON DAM OUTLET PIPE.2.COORDINATE WITH ENGINEER ON APPROVED MATERIALS ANDINSTALLATION TECHNIQUES PRIOR TO INSTALLATION.FLOWSCALE:3C-16SAND DIAPHRAGMN.T.S.3'4.5'4.5'1.5 x DIA = 2.25'3 x DIA =4.5'**2' MIN.**2' MIN. FROM TOP OF DAM GOVERNSIF 3 x DIA. IS NOT AVALIABLE.TOP OF DAM18" RCPOUTLETFINE SAND FILTERPER ASTM C334" PERFORATED PVCWRAPPED IN FABRICTO DAYLIGHT4" PERFORATED PVCWRAPPED IN FABRIC TODAYLIGHTN20'40'SCALE IN FEET10'20'SCALE: 1 IN = 20 FTSCALE IN FEETHORIZONTAL0SCALE:1C-16WET POND #2 - PLAN VIEW1"=20'5' WIDEBERMPERMANENT POOL ELEV = 254.00WQV TEMPORARY POOL ELEV = 256.00MAIN PERMANENT POOLFOREBAYSCALE:2C-16WET DETENTION BASIN - SECTION VIEW1"=20' H / 1"=4' VSCALE IN FEET04'SCALE:1"=4'VERTICAL6' VEGETATED SHELF AT 6:1 MAXSLOPE. PERMANENT POOL TO BECENTERED IN SHELFEXISTING GROUND123120'40'SCALE IN FEET10'20'SCALE: 1 IN = 20 FTSCALE IN FEETHORIZONTAL031BOTTOM ELEV = 250.00SEDIMENT STORAGEELEV = 251.00SEDIMENT STORAGE ELEV = 247.50BOTTOM ELEV = 246.50CLAY LINER, REFER TO NOTESCOMPACTED SUBGRADEFOREBAY BERMELEV = 255.00FOREBAY WEIR BOTTOM ELEV = 254.00PRECAST RISER STRUCTURE W/ TRASHRACK, REFER TO DETAIL ON THIS SHEETPRECAST RISER STRUCTURE,REFER TO DETAIL ON THIS SHEET18" RCP @ 1.00%(O-RING JOINTS ASTM C443)FES #500INV = 253.50REFER TO NOTES FOREMBANKMENT COMPACTIONSAND DIAPHRAGM, REFERTO DETAIL ON THIS SHEET50' EMERGENCYSPILLWAYBOTTOM ELEV. = 259.302 YEAR WSE = 257.2010 YEAR WSE = 259.3025 YEAR WSE = 259.87100 YEAR WSE = 260.2612FES #200TOP OF DAM = 260.50SCALE:6C-16WET DETENTION BASIN - SECTION VIEW1"=20' H / 1"=4' VSCALE IN FEET04'SCALE:1"=4'VERTICAL20'40'SCALE IN FEET10'20'SCALE: 1 IN = 20 FTSCALE IN FEETHORIZONTAL0RIP-RAP OUTLET PROTECTIONNCDOT CLASS 'I' RIP RAPL=16', W1=6', W2=8', D=24",D50=13", DMAX=19"FOREBAYTOP SED. ELEV = 251.00BOTTOM SED. ELEV = 250.00MAIN PONDPERMANENT POOL = 254.00TEMPORARY POOL = 256.00TOP SEDIMENT ELEV = 247.50BOTTOM SEDIMENT ELEV = 246.5020' PRIVATE STORMDRAIN EASEMENTSHALLOW WATERSHALLOW LANDRIP-RAP OUTLET PROTECTIONNCDOT CLASS 'B' RIP RAPL=9', W1=5', W2=6', D=18",D50=6", DMAX=9"C-16250' CAST-IN-PLACE CONCRETESPILLWAY-REFER TO DETAIL,THIS SHEET6' WIDE - 6:1 VEGETATED SHELFTOP ELEV.= 254.50P.POOL ELEV = 254.00BOTTOM ELEV.= 253.50RIP RAP EMERGENCYSPILLWAY NCDOTCLASS "B" RIP RAPVARIABLE WIDTH BMPACCESS & MAINTENANCEEASEMENT3:1 SLOPETOP OF BERM = 255.00WEIR ELEV. = 254.00T
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0 6' VEGETATEDSHELFC-16618" RCP @ 1.00%(O-RING JOINTS ASTM C443)FES #500INV = 253.50REFER TO NOTES FOREMBANKMENT COMPACTIONSAND DIAPHRAGM, REFERTO DETAIL ON THIS SHEET6' VEGETATED SHELF AT 6:1 MAXSLOPE. PERMANENT POOL TO BECENTERED IN SHELFPRECAST RISER STRUCTURE,REFER TO DETAIL ON THIS SHEETCLAY LINER, REFER TO NOTESCOMPACTED SUBGRADEMAIN PERMANENT POOLFOREBAY12123131PRECAST RISER STRUCTURE W/ TRASHRACK, REFER TO DETAIL ON THIS SHEETTOP OF DAM = 260.50PERMANENT POOL ELEV = 254.00WQV TEMPORARY POOL ELEV = 256.0050' EMERGENCYSPILLWAYBOTTOM ELEV. = 259.30FOREBAY WEIR BOTTOM ELEV = 254.005' WIDEBERMFOREBAY BERMELEV = 255.00EXISTING GROUNDBOTTOM ELEV = 250.00SEDIMENT STORAGEELEV = 251.002 YEAR WSE = 257.2010 YEAR WSE = 259.3025 YEAR WSE = 259.87100 YEAR WSE = 260.26FES #300TW: 261.00BW: 260.50TW: 261.00BW: 256.00SHALLOW WATERSHALLOW LANDTOP OF BERM = 255.00WEIR ELEV. = 254.00FOREBAYTOP SED. ELEV = 251.00BOTTOM SED. ELEV = 250.00RIP-RAP OUTLET PROTECTIONNCDOT CLASS 'I' RIP RAPL=24', W1=9', W2=11', D=24",D50=10", DMAX=17"TW: 261.00BW: 256.00TW: 261.00BW: 260.50STORMWATER MANAGEMENT NOTES:1.THIS SITE IS LOCATED WITHIN THE CAPE FEAR RIVER BASIN.2.SITE DRAINS TO BLACK RIVER, STREAM CLASSIFICATION C; SW, INDEX NO. 18-68-12-13.THE PROPOSED DEVELOPMENT IS CONSIDERED HIGH DENSITY PER NCDENR - DWQ DEFINITIONS.4.WET DETENTION BASINS MEET THE MINIMUM DESIGN CRITERIA, PART C-3 & PROVIDES PEAKFLOW ATTENUATION FOR THE 2 & 10 YEAR STORM EVENTS.CCSEDIMENT STORAGE ELEV = 247.50BOTTOM ELEV = 246.50C