SW1191201_Plan (Set)_20200414

4"PVCPERMANENT WET DETENTION POND STORMWATER CONTROL MEASURE (SCM)4-FT8-IN4-FT XY24-IN
8-IN
RIM ELEV: 1203.30TOP SLAB ELEV: 1205.50EMERGENCY SPILLWAY SECTION313110-FTSELECT FILLCOMPACTEDEMERGENCY SPILLWAY CREST ELEV: 1206.50 TOP OF EMBANKMENT ELEV: 1208.00PERMANENT POOL ELEV: 1201.50EMBANKMENTFOREBAY / MAIN POOLOUTLET STRUCTUREWET DETENTION BASIN MAINTENANCE SCHEDULECONTRACTOR SHALL BE RESPONSIBLE FOR MAINTENANCE UNTIL PROJECT CLOSE OUTAT WHICH TIME OWNER WILL ASSUME MAINTENANCE RESPONSIBILITY.SEDIMENT / DEBRISBY HANDEROSION / ANIMAL NESTINGSDEBRIS / OBSTRUCTIONSINSPECT AND REPAIRDESCRIPTIONBY HANDVISUALMETHODONCE PER YEARALLWHENEVER NEEDEDFREQUENCYALLALLSEASONOPERATE POND DRAIN VALVEBY HANDALLEROSION AT OUTLET DISCHARGEVISUALALLONCE PER YEARONCE PER YEARONCE PER YEARREMOVE TRASHBY HANDWHENEVER NEEDEDALLGRASS COVERAGEINSPECT AND RESEEDVISUALALLWHENEVER NEEDED3131218-IN6" DUCTILE IRON DEWATERING PIPE 6-IN DIP24-IN36-IN12-IN6' WIDE AQUATIC BENCHAROUND ENTIRE POND(SEE SHEETS C4.1 & C6.1)NTS24"MIN24"MIN24" MIN.24" MIN.1.INSTALL POND BARREL, OUTLET STRUCTURE, EMBANKMENT ANDALL OTHER POND COMPONENTS.2.CALL FOR SITE INSPECTION PRIOR TO BACKFILLING POND BARREL.3.INSTALL TEMPORARY SKIMMER TO OUTLET STRUCTURE.4.EXCAVATE POND TO TEMPORARY SKIMMER BASIN DIMENSIONS,SEE EROSION CONTROL PLAN.5.INSTALL BAFFLES AND OTHER TEMPORARY SKIMMER BASINCOMPONENTS, SEE TEMPORARY SKIMMER BASIN DETAIL.6.REFER TO TEMPORARY SEDIMENT SKIMMER BASIN DETAIL FORELEVATION OF SKIMMER CONNECTION.7.SEE CONSTRUCTION SEQUENCE ON EROSION CONTROL PLAN FORINFORMATION.8.ONCE SITE IS APPROVED, REMOVE TEMPORARY SKIMMER,BAFFLES AND OTHER TEMPORARY COMPONENTS9.FILL HOLE IN OUTLET STRUCTURE FROM SKIMMER WITHNON-SHRINK GROUT. PROVIDE PERMANENT WATERTIGHT SEAL.10.EXCAVATE SEDIMENT AND GRADE TO FINAL CONTOURS, SEEGRADING PLAN.11.CONSTRUCT WET POND STORMWATER CONTROL MEASURE ASSHOWN ON THE DRAWINGS.OUTLET STRUCTURE NOTESAS-BUILT SURVEY REQUIREMENTSNOTE:CONTRACTOR SHALL PROVIDE AS-BUILT TOPOGRAPHICSURVEY PERFORMED BY A PROFESSIONAL LAND SURVEYOR CERTIFYINGWET DETENTION POND AREA DIMENSIONS AND ELEVATIONS OF THEFOLLOWING:1.TOPOGRAPHIC SURVEY OF THE WET POND AND EMBANKMENT2.OUTLET STRUCTURE TOPS AND INVERTS3.OUTLET STRUCTURE DIMENSIONS4.ORIFICE DIAMETERS5.BARREL PIPE SIZES AND INVERTS6.EMERGENCY SPILLWAY ELEVATION AND DIMENSIONS.1.CAST-IN-PLACE CONCRETE RISER IS REQUIRED WITHOUTEXCEPTION.2.CLASS "A" (3,000 PSI) CONCRETE TO BE USED.6.ALL MORTOR JOINTS ARE 1/2" ± 1/8".7.GROUT SHALL BE NON-SHRINK (ASTM-C1107)8.ALL STRUCTURES OVER 3'-6" IN DEPTH TO BE PROVIDED WITHSTEPS 1'-2" ON CENTERS. STEPS SHALL BE IN ACCORDANCE WITHSTANDARD 840.66.9.LOCATE MANHOLE OVER STEPS.16" IMPERVIOUS FILLLAYER UNDER ALLWATER SURFACES6-FT WIDE ACCESSPAD TO OUTLETSTRUCTURE 6-INBELOW WEIRPRINCIPALSPILLWAYPROVIDE 6' X 6' DEPRESSED AREA2-FT BELOW PRINCIPAL SPILLWAYWITHIN AQUATIC BENCH FORADEQUATE DRAINAGE6-FT LENGTHFOREBAY WEIRELEV : 1200.00TOP OF WEIRELEV: 1201.50AQUATIC BENCH ELEV: 1201.00INSIDE EDGE OF AQUATIC BENCH IS6-IN BELOW PERMANENT POOL ELEVAQUATTIC BENCH ELEV: 1202.00OUTSIDE EDGE OF AQUATIC BENCH IS6-IN ABOVE PERMANENT POOL ELEVSEED & MULCH EMBANKMENT SEE SEEDING SCHEDULE(INSTALL SLOPE PROTECTION MATTING ON ALL SLOPESSTEEPER THAN 6:1)BARREL INV=1197.00FLANGED, NRS, RESILIENT WEDGE GATEVALVE WITH EXTENSION STEM, HAND WHEELAND STEM GUIDES AS MANUFACTURED BYCLOW OR APPROVED EQUAL.CONCRETEPIPE ANCHORTEMPORARY SKIMMER TOBE REMOVED ( SEECONSTRUCTIONSEQUENCE)U-SHAPED STEELBRACKET ATTACHED TOBASE WITH THREADEDROD FILLED WITH GROUTVALVE STEM GUIDE. ATTACHTO RISER WITH THREADEDROD FILLED WITH GROUTPVC PRIMARY SPILLWAYORIFICE DIAMETER: 3.5-INPERMANENT POOL ELEV: 1201.50ANCHOR TRASH RACK(ALL CONTACT POINTS)#4 REBAR 6" O.C. E.W.TRASH RACK (ALLFOUR SIDES OFOUTLET STRUCTURE)CONCRETE SLABMANHOLE RING AND COVER#4 BARS 8" O.C. E.W.3"RCAST IN PLACE RISER ISREQUIRED WITHOUTEXCEPTIONDAM EMBANKMENT CONSTRUCTION STANDARDS1.CONTROLLED FILL, AS SPECIFIED BY THE GEOTECHNICAL ENGINEER, IN THE DAM EMBANKMENT SHALL BE PLACED IN 6-INCH LOOSE LAYERS (3-INCH LOOSE LAYERS WITHIN 3-FEET OFEITHER SIDE OF THE PRINCIPAL SPILLWAY PIPE TO A DEPTH OF 2-FEET OVER THE PIPE) AND SHALL BE COMPACTED TO A DENSITY OF NO LESS THAN 95% OF THE STANDARD PROCTORMAXIMUM DENSITY AT A MOISTURE CONTENT OF + OR - TWO PERCENTAGE POINTS OF THE OPTIMUM MOISTURE CONTENT IN ACCORDANCE WITH ASTM D698.2.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 ORGANIC MATTERCONTENT EXCEEDING 5% BY WEIGHT SHALL NOT BE USED. STONES GREATER THAN 3-INCH (IN ANY DIRECTION) SHALL BE REMOVED FROM THE FILL PRIOR TO COMPACTION.3.FILL MATERIAL PLACED AT DENSITIES LOWER THAN SPECIFIED MINIMUM DENSITIES OR AT MOISTURE CONTENTS OUTSIDE THE SPECIFIED RANGES OR OTHERWISE NOT CONFORMING TOSPECIFIED REQUIREMENTS SHALL BE REMOVED AND REPLACED WITH ACCEPTABLE MATERIALS.4.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 THE NEXT SOILLIFT.5.SURFACE WATER AND STREAM FLOW SHALL BE CONTINUOUSLY CONTROLLED THROUGHOUT CONSTRUCTION AND THE PLACEMENT OF CONTROLLED FILL.6.FOUNDATION AREAS MAY REQUIRE UNDERCUTTING OF COMPRESSIBLE AND/OR UNSUITABLE SOILS IN ADDITION TO THAT INDICATED ON THE PLANS. ALL SUCH UNDERCUTTING SHALL BEPERFORMED AT THE DISCRETION OF THE GEOTECHNICAL ENGINEER AND SHALL BE MONITORED AND DOCUMENTED. IN NO CASE SHALL THERE BE AN ATTEMPT TO STABILIZE ANY PORTIONSOF THE FOUNDATION SOILS WITH CRUSHED STONE.7.TREATMENT OF SEEPAGE AREAS, SUBGRADE PREPARATION, FOUNDATION DEWATERING AND ROCK FOUNDATION PREPARATION (I.E., TREATMENT WITH SLUSH GROUTING, DENTAL CONCRETE,ETC.) MAY BE REQUIRED AT THE DISCRETION OF THE GEOTECHNICAL ENGINEER. ALL SUCH ACTIVITIES SHALL BE CLOSELY MONITORED AND DOCUMENTED BY THE GEOTECHNICAL ENGINEER.8.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 STRUCTURES.9.EARTHWORK COMPACTION WITHIN 3-FEET OF ANY STRUCTURES SHALL BE ACCOMPLISHED BY MEANS OF HAND TAMPERS, MANUALLY DIRECTED POWER TAMPERS OR PLATE COMPACTORS ORMINIATURE SELF-PROPELLED ROLLERS.10.COMPACTION BY MEANS OF DROP WEIGHTS FROM A CRANE OR HOIST SHALL NOT BE PERMITTED.11.HEAVY EQUIPMENT SHALL NOT BE ALLOWED TO PASS OVER CAST-IN-PLACE STRUCTURES (INCLUDING THE CRADLE) UNTIL ADEQUATE CURING TIME HAS ELAPSED.12.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.TESTING, OBSERVATION, AND CERTIFICATION1.TESTS OF THE DEGREE (%) OF COMPACTION OF THE PLACED FILL IN THE DAM SHALL BE PERFORMED AS A PART OF THE PERMITTEE'S NORMAL QUALITY CONTROL PROGRAM FOR THECONSTRUCTION OF THE DAM. TESTS SHALL BE CONDUCTED CONCURRENT WITH THE INSTALLATION OF THE COMPACTED FILL AND THE CONTRACTOR SHALL COORDINATE THE CONSTRUCTIONOF THE DAM SO THAT THE TESTING CAN BE COMPLETED. SHOULD THE RESULTS OF THE TESTS INDICATE THAT THE SPECIFIED DEGREE OF COMPACTION HAS NOT BEEN OBTAINED; THEPORTIONS OF THE DAM REPRESENTED BY SUCH TESTS SHALL BE REWORKED OR REBUILT. ALL PORTIONS OF THE DAM SHALL ACHIEVE THE SPECIFIED MINIMUM DEGREE OF COMPACTION.2.CONSTRUCTION OF CLASS A, B AND C DAM EMBANKMENTS SHALL BE DONE UNDER THE OBSERVATION OF A QUALIFIED GEOTECHNICAL ENGINEER, WHO IS REGISTERED AS A PROFESSIONALENGINEER IN THE STATE OF NORTH CAROLINA. THE GEOTECHNICAL ENGINEER MUST HAVE EXPERIENCE IN THE DESIGN AND CONSTRUCTION MONITORING OF DAMS OF THE SIZE AND SCOPECOVERED BY THESE STANDARDS AND GUIDELINES.3.ON CLASS A, B, AND C DAMS (WITH THE EXCEPTION OF DETENTION ONLY CLASS C DAMS THAT COLLECT DRAINAGE FROM AN AREA OF 25-ACRES OR LESS), THE GEOTECHNICAL ENGINEER,AS DEFINED ABOVE, SHALL OBSERVE ALL ASPECTS OF THE CONSTRUCTION OF THE DAM (I.E., PREPARATION OF THE FOUNDATION, INSTALLATION OF THE CUT-OFF TRENCH, INSTALLATION OFTHE PRINCIPAL SPILLWAY PIPE, INSTALLATION OF THE INTERNAL DRAINAGE, INSTALLATION OF COMPACTED FILL, ETC.). THE FREQUENCY OF OBSERVATION AND TESTING MUST BESUFFICIENT FOR THE GEOTECHNICAL ENGINEER (OR THE DESIGN ENGINEER ON CLASS D DAMS AND CLASS C, DETENTION ONLY, DAMS) TO STATE, IN HIS/HER PROFESSIONAL OPINION,THAT THE SPECIFIC ITEMS OBSERVED AND TESTED WERE INSTALLED IN ACCORDANCE WITH THE APPROVED CONSTRUCTION DRAWINGS AND SPECIFICATIONS.613' SUBMERGEDOUTLET BARREL: 142-LF 24" RCP @17.2% SLOPE (ASTM C-76, CLASS III) GASKETED JOINT PIPE MANUFACTURED WITHOUT LIFT HOLES. GASKETEDJOINT PIPE SHALL BE WRAPPED WITH A DOUBLE LAYER OF NON-WOVEN FILTER FABRIC ON THE OUTSIDE OF THE PIPE AT EACH JOINT.FOREBAYEMBANKMENT21INV=1197.206" DUCTILE IRONDRAIN PIPE6-INYXFILL SKIMMERHOLE WITHNON-SHRINKGROUT FORWATERTIGHTSEAL6-IN DUCTILE IRON DRAIN PIPEWITH GATE VALVE AND HANDWHEELBARRELOUTLETEND CAP WITH DRILL OPENINGDIAMETER: 3.5-IN4"PVC TEEANCHORDRAWDOWNPIPE TO WALLANCHORDRAWDOWNPIPE TO WALLWATERTIGHTNON-SHRINKGROUT10-INCONTRACTOR SHALL PROVIDESTEP IN ACCORDANCE WITHNCDOT STD. 840.66. STEPSSHALL BE PLACED AT 16" O.C.INV =1197.00INV =1197.10142-LF 24-IN RCPCONCRETE FILLTO EXCEEDBUOYANT FORCE2-FT
CONCRETE FILLTO EXCEEDBUOYANT FORCE2-FT INV=1197.10PERMANENT POOL ELEV: 1201.50INV=1201.50CONCRETE PIPE ANCHORENLARGEMENTOUTLET STRUCTURE SECTION X-XOUTLET STRUCTURE SECTION Y-YOUTLET STRUCTUREPLAN VIEWPOND AND EMBANKMENT SECTIONANTI-SEEP COLLARENLARGEMENTPRIMARY SPILLWAYENLARGEMENT4"PVC8-INEXTEND PIPEOUTSIDEEMBANKMENTINV =1197.20TOP PERMANENT SEDIMENT STORAGE ELEV: 1197.00BOTTOM PERMANENT SEDIMENT STORAGE ELEV: 1196.008-IN8-IN
6-FT X 6-FT X 2.5-FT DEEPDEPRESSION UNDER PRINCIPALSPILLWAY FOR ADEQUATEDRAINAGE. TIE BACK TO AQUATICBENCH AT 3:1 SLOPE.HEAVY DUTYVALVE STEMPRIMARYSPILLWAYINV=1201.50END CAP WITH DRILL OPENINGDIAMETER: 3.5-INPERM. POOL ELEV: 1201.50PRIMARYSPILLWAYINV=1201.50FILL SKIMMER HOLE WITHNON-SHRINK GROUT.PROVIDE PERMANENTWATERTIGHT SEAL.INV=1201.50PRIMARYSPILLWAYSEQUENCE OF CONVERSION FROM SEDIMENT BASIN TO STORMWATERCONTROL MEASUREMID POINT OFAQUATIC BENCHELEV: 1199.002.5-FTDEWATERINGPIPE INV=1197.10TEMPORARY SKIMMER TO BEREMOVED (SEQUENCE OFCONVERSION FROM SEDIMENTBASIN TO STORMWATERCONTROL MEASURE)#4 BARS8"O.C. E.W.5-IN THICKCONCRETE SLAB8-IN
8-IN
TRASH RACKIS ON ALLFOUR SIDESFOREBAY WEIR SECTION3110-FT WEIR WIDTHFORBAY WEIR CREST ELEV: 1199.5024-IN THICK CLASS BRIPRAP OVER FILTERFABRIC31AQUATIC BENCH ELEV: 1201.00INV=1203.30TOP ELEV: 1205.5TOP OF PERM. SED. STOR. ELEV: 1197.00MAIN POOLFOREBAYBOT. OF PERM. SED. STOR. ELEV: 1196.003110-FT WEIR WIDTHSPILLWAY CREST ELEV: 1206.5024-IN THICK CLASS BRIPRAP OVER FILTERFABRIC31TOP OF EMBANKMENT ELEV: 1208.00CONC. ANTI-SEEP COLLAR (6" WIDE)3 TOTAL UNDER EMBANKMENT WITHONE COLLAR UNDER CENTER OFDAM2-FT
2-FT
24"RCPSELECT FILLCOMPACTEDCORE DRILL AND PROVIDEWATERTIGHT CONNECTION TOEXISTING DROP INLETINV=1171.00EXISTING DROP INLETCONCRETEPIPECOLLAR6-IN THICKCONCRETE PIPECOLLAR TOSPRINGLINE8-IN8-INWEIR ELEV: 1203.30TOP SLAB ELEV: 1205.5024"3" DIA. CONCRETE COREHEAVY DUTYVALVE STEMWHEELTRASH RACKIS ON ALLFOUR SIDESCONCRETEPIPE ANCHORBARRELOUTLET142-LF 24-IN RCP3"OUTLET STRUCTURE6-FT WIDE ACCESSPAD TO OUTLETSTRUCTURE 6-INBELOW WEIR6-IN3131312-FT
2-FT
2-FT
2-FT
8-IN8-INSEASONAL HIGH WATER TABLE BELOW ELEV: 1192.00 1-YR STORM ELEV2-YR STORM ELEV1203.681204.0210-YR STORM ELEV1205.10100-YR STORM ELEV1206.60SCHEDULE A PRE-INSTALLATIONCONFERENCE PRIOR TOCONSTRUCTION OF THESTORMWATER CONTROL MEASURETOP OF PERM. SED. STOR.FOREBAY ENTRANCEELEV: 1197.00TOP OF PERM. SED. STOR.FOREBAY EXITELEV: 1197.0042" RCP INLET PIPEBOT. OF PERM. SED. STOR.FOREBAY ENTRANCEELEV: 1196.00BOT. OF PERM. SED. STOR.FOREBAY EXITELEV: 1196.00RIPRAP PADEXIT ELEV: 1198ENTRANCE ELEV: 1197N O R T H C A R O L I
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A N C I S S L I N S K Y, I I ISheet Number:Date:Drawn by:Project Number:2020 APR 07FSRevisionsNo.DateNC LICENSE NUMBER C-1652
Timmons Group
Attn: Frank Slinsky, PE
5210 Trinity Road; Suite 102
Raleigh, NC 27607
Phone: [phone]
Fax: [phone]
DPS - NORTH CAROLINA NATIONAL GUARD
MORGANTON REGIONAL READINESS CENTER (NC CONNECT)
SCO#: 16-14394-02B Phase II: New Construction
MILCON Project #: MDT714
5155 Western Avenue, Morganton, NC 286551711-B2020 FEB 1222020 APR 073C8.14SITE DETAILS