SW6180801_Plansheet C-15 SCM Detail_20180829

WTLDWTLDWTLDWTLDWTLDWTLDWTLDWTLDWTLDWTLDWTLDWTLD WTLD WTLD WTLD WTLD WTLD WTLD WTLD WTLD WTLD WTLD WTLD WTLD WTLD WTLDWTLDWTLDWTLDWTLDWTLDWTLDWTLDWTLDWTLDWTLDWTLDWTLDWTLDWTLDWTLDFLD FLDFLDFLDFLDFLDFLDFLD 260253254259 261261259257256254253252255 261259257256255260260255 25810+0011+00FES#40030 LF 15" RCP@ 1.00%RS#401FES#100STORM DRAINAGE TABLEINLET#400401TYPEFESRSROADWAYNONE.NONE.RIM ELEV(EOP)258.72259.94INV IN(FROM-SIZE)257.20(401-15")INV OUT(TO-SIZE)257.50(400-15")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-15 SCM PLAN AND SECTIONS I.DWGPLOTTED: 8/29/2018 2:12 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 IC-151" = 20'N20'40'SCALE IN FEET10'20'SCALE: 1 IN = 20 FTSCALE IN FEETHORIZONTAL0SCALE:1C-15WET POND #1 - PLAN VIEW1"=20'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-INCHLOOSE LAYERS WITHIN 3 FEET OF EITHER SIDE OF THE PRINCIPLE SPILLWAY PIPE TO A DEPTH OF 2-FEET OVER THE PIPE) AND SHALLBE COMPACTED TO A DENSITY OF NO LESS THAN 95% OF STANDARD PROCTOR MAXIMUM DRY DENSITY AT OPTIMUM MOISTURECONTENT 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 TOTHE REQUIRED DENSITY. SOILS WITH ORGANIC MATTER CONTENT EXCEED 5% BY WEIGHT SHALL NOT BE USED. STONES GREATER THAN3-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 THESPECIFIED RANGES OR OTHERWISE NOT CONFORMING TO SPECIFIED REQUIREMENTS SHALL BE REMOVED AND REPLACED WITHACCEPTABLE MATERIALS.9.ANY FILL LAYER THAT IS SMOOTH DRUM ROLLED TO REDUCE MOISTURE PENETRATION DURING A STORM EVENT SHALL BE PROPERLYSCARIFIED PRIOR TO THE PLACEMENT OF THE NEXT SOIL LEVEL.10.SURFACE WATER AND STREAM FLOW SHALL BE CONTINUOUSLY CONTROLLED THROUGHOUT CONSTRUCTION AND THE PLACEMENT OFTHE CONTROLLED FILL.11.FOUNDATION AREAS MAY REQUIRE UNDERCUTTING OR COMPRESSIBLE AND/OR UNSUITABLE SOILS. ALL SUCH UNDERCUTTING SHALLBE PERFORMED AT THE DISCRETION OF THE GEOTECHNICAL ENGINEER AND SHALL BE MONITORED AND DOCUMENTED. IN NO CASESHALL THERE BE AN ATTEMPT TO STABILIZE ANY PORTIONS OF THE FOUNDATION SOILS WITH CRUSHED STONE.12.TREATMENT OF SEEPAGE AREAS, SUBGRADE PREPARATIONS, FOUNDATION DEWATERING, AND ROCK FOUNDATION PREPARATIONMAYBE REQUIRED AT THE DISCRETION OF THE GEOTECHNICAL ENGINEER.13.FILL ADJACENT TO THE RISER AND PRINCIPAL SPILLWAY PIPE SHALL BE PLACED SO THAT LIFTS ARE AT THE SAME LEVEL ON BOTH SIDESOF THE STRUCTURE.14.EARTHWORK COMPACTION WITHIN 3-FT OF ANY STRUCTURES SHALL BE ACCOMPLISHED BY MEANS OF HAND TAMPERS, MANUALLYDIRECTED POWER TAMPERS OR PLATE COMPACTORS 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 DISTURBEDEMBANKMENT SURFACE AND THE AREA SEEDED AND MULCHED OR HYDROSEEDED.18.ALL RISER STRUCTURES, INCLUDING WEIR WALL TYPE STRUCTURES, SHALL BE REINFORCED CONCRETE. BRICK/CONCRETE BLOCK ANDMORTAR TYPE STRUCTURES WILL NOT BE ACCEPTED.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 TOADJACENT SECTIONS WITH STAINLESS STEEL STRAPS. STEEL STRAPS SHALL BE MINIMUM 4" WIDE, 1/4" THICK, STRAP CENTERED ONJOINT 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 ITDOES NOT IMPEDED THE GROWTH OF VEGETATION OR CAN BE PENETRATED BY ROOTS OF VEGETATION. CLAY LINER SHALL LIMITINFILTRATION RATE TO 0.01 IN/HR. CLAY LINER SHALL BE INSTALLED UP TO PERMANENT POOL ELEVATION THROUGHOUT POND.ALTERNATIVE LINERS MAYBE ACCEPTABLE IF APPROVED BY ENGINEER OF RECORD.22.REFER TO L-02 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 TOINSTALLATION.SCALE:3C-15EMERGENCY 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 LATEST EDITIONOF ACI SPECIFICATIONS. CONCRETE SHALL BE A MINIMUM OF 3,000 PSI WITH #3STIRRUPS 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.30'CREST LENGTHTOP OF DAMELEV = 261.50SPILLWAYELEV = 260.50NO.3 STIRRUPS @ 12" O.C.NO.5 REBAR @ 12" O.C.BOTTOMELEV = 258.001
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15" GASKETTED O-RINGRCP OUTLET PIPEANTI-VORTEX TRASH RACKANCHORED TO RISER.CONTRACTOR TO SUBMIT SHOPDRAWINGS PRIOR TOINSTALLATION. ANCHOR TOCONCRETE RISER IN 4 LOCATIONS.MANHOLESTEPS, TYPCREST = 259.75INV = 257.50BOTTOM = 255.5012"DRAW DOWNORIFICEINV = 257.504"x4" PVC TEE4" PLUGSET TOP OF PVC PLUG ATTEMPORARY POOLDRILL 1.50" ØOPENING IN 4" PLUGTOP OFBERM = 261.50FILL WITH LEAN CONCRETEFROM INVERT OF OUTLET PIPETO MANHOLE EXTENDED BASE(4) 6" DIAMETER ORIFICEKNOCKOUTSINV ELEV= 258.75BOTTOM OF PONDELEV = 251.00PERMANENT POOL = 257.50TEMPORARY POOL = 258.75STANDARDMANHOLE BASESCALE:4C-15CONCRETE RISER DETAILN.T.S.6"60" DIAMETERPRE-CASTMANHOLE24"24"NOTES:1. CONTRACTOR SHALL INSTALL FILTER DIAPHRAGM ON DAMOUTLET PIPE.2.COORDINATE WITH ENGINEER ON APPROVED MATERIALS ANDINSTALLATION TECHNIQUES PRIOR TO INSTALLATION.FLOWSCALE:5C-15SAND DIAPHRAGMN.T.S.3'3.75'3.75'1.5 x DIA = 1.9'3 x DIA =3.75'**2' MIN.**2' MIN. FROM TOP OF DAM GOVERNSIF 3 x DIA. IS NOT AVALIABLE.TOP OF DAM15" RCPOUTLETFINE SAND FILTERPER ASTM C33TOP FOREBAY BERM = 258.504" PERFORATED PVCWRAPPED IN FABRICTO DAYLIGHT4" PERFORATED PVCWRAPPED IN FABRIC TODAYLIGHTFOREBAYTOP SED. ELEV = 255.50BOTTOM SED. ELEV = 254.50MAIN PONDPERMANENT POOL = 257.50TEMPORARY POOL = 258.75TOP SEDIMENT ELEV = 252.00BOTTOM SEDIMENT ELEV = 251.0020' PRIVATE STORMDRAIN EASEMENT5' WIDEBERMPERMANENT POOL ELEV = 257.50WQV TEMPORARY POOL ELEV = 258.75MAIN PERMANENT POOLFOREBAYSCALE:2C-15WET 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 GROUND1231SHALLOW WATERSHALLOW LANDRIP-RAP OUTLET PROTECTIONNCDOT CLASS 'B' RIP RAPL=8', W1=4', W2=5', D=18",D50=8", DMAX=12"C-15230' CAST-IN-PLACE CONCRETESPILLWAY-REFER TO DETAIL,THIS SHEET6' WIDE - 6:1 VEGETATED SHELFTOP ELEV.= 258.00P.POOL ELEV = 257.50BOTTOM ELEV.= 257.00RIP RAP EMERGENCY SPILLWAYNCDOT CLASS "B" RIP RAPVARIABLE WIDTH BMPACCESS & MAINTENANCEEASEMENT3:1 SLOPE20'40'SCALE IN FEET10'20'SCALE: 1 IN = 20 FTSCALE IN FEETHORIZONTAL0WEIR ELEV. = 257.50SHALLOW WATERSHALLOW LAND TOP OF BERM = 261.506' VEGETATEDSHELF3131BOTTOM ELEV = 254.50SEDIMENT STORAGEELEV = 255.50SEDIMENT STORAGE ELEV = 252.00BOTTOM ELEV = 251.00CLAY LINER, REFER TO NOTESCOMPACTED SUBGRADEFOREBAY BERMELEV = 258.50FOREBAY WEIR BOTTOM ELEV = 257.50PRECAST RISER STRUCTURE W/ TRASHRACK, REFER TO DETAIL ON THIS SHEETPRECAST RISER STRUCTURE,REFER TO DETAIL ON THIS SHEET15" RCP @ 1.00%(O-RING JOINTS ASTM C443)FES #400INV = 257.20REFER TO NOTES FOREMBANKMENT COMPACTIONSAND DIAPHRAGM, REFERTO DETAIL ON THIS SHEET30' EMERGENCYSPILLWAYBOTTOM ELEV. = 260.502 YEAR WSE = 259.2910 YEAR WSE = 260.3325 YEAR WSE = 260.76100 YEAR WSE = 261.02TOP OF DAM = 261.50RIP-RAP OUTLET PROTECTIONNCDOT CLASS 'B' RIP RAPL=9', W1=5', W2=6', D=18",D50=6", DMAX=9"STORMWATER 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 PEAK FLOW ATTENUATION FOR THE 2 & 10 YEARSTORM EVENTS.CC