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Home My WebLink AboutSW6210905_Plansheet - SCM Detail_20220225I 3 5 VELOCITY RIP -RAP DISSIPATOR PAD 8'X6' 9"D CLASS B 20' WIDE EMERGENCY SPILLWAY ELEV 267.75 D C �aa = i � � IIIIIIIIIIIIIIIV � � - - / I FES #1 J ELEV 263.00 / I 63 LF OF 24" RCP ®2.4% I\ , NORMAL WATER ELEV. 264.50 I I 260 I ELEVF�REBAY 64.50 iil � C 1\ ,\, - I \ w FES 3 B xl I' CON ROL \ I, I' STIR CTURE \ (SEE \DETAILS I I I L THIS HEET) I \ <I I I I I I II I I Ii I/ / I \ I 16 LITTORAL I SHELF / i / I I / / I' / Jx / - - -24" RCP JB#4 REMOVABLE WHEEL TO DRAIN VALVE SILL ELEV. ON 3 SIDES (267.0 12" MI 3" TEE INV. (264.5 W/ 1.50" ORIFICE PERMANENT POOL ELEV. 8" CM -S_ (WATERPROOFED) OR PRECAST EQUIVALENT 4" DRAIN PIPE-"-.. W/ GATE VALVE 4" CONC PAD------- INSTALL MH ACCESS COVER W/ PULL HANDLES (PROVIDE ACCESS LADDER DOWN INSIDE OF CONTROL STRUCTURE) 8" THICK 3,000 PSI CONIC. TOP SLAB W/ #4 REBAR 0 6" O.C. IN EACH DIRECTION i 8"x8" CMU CORNER SUPPORTS FOR TOP SLAB 4" MIN. OPEN 44" RECTANGULAR WEIR (266.00) TO R PI RAP PAD 3,000 PSI CONC J 5' �2 5' W/ #5 REBAR ® 16"\-24" RCP O.C. BOTH DIRECTIONS INV=264.00 BOTTOM C.S. (263.00 CONTROL STRUCTURE DETAIL N TS WET POND PLANT LIST KEY QTY BOTANICAL NAME COMMON NAME REMARKS WET POND LITTORAL SHELF - 2,420 SF /200 x 50 = 605 PLUGS REQUIRED CT 151 Carex tenera* Quill Sedge 3" x 2.5" SQUARE PLUGS (MIN) EM 151 Eupotoriodelphus moculatus Spotted trumpetweed 3" x 2.5" SQUARE PLUGS (MIN) PV 152 Peltandro virginica Arrow arum 3" x 2.5" SQUARE PLUGS (MIN) SA 151 Schoenoplectus americanus Three -square bulrush 3" x 2.5" SQUARE PLUGS (MIN) SLOPE STABILIZATION GRASSES CENTIPEDE GRASS 5,115 SF TEremochloo ophiuroides SEED AT 50 LBS. PER ACRE WET POND PLANTING LEGEND CENTIPEDE GRASS >' (10,187 SF.) LITTORAL SHELF PLANTINGS (2,420 SF.) NOTES: *EVERGREEN SPECIES CONCRETE ANTI-BOUYANCY FOOTING CALCULATIONS DISPLACED VOLUME V=(5')(5')(4'+1')= 125 C.F. DISPLACE WATER=(125 CF)(62.4 PCF)=7,800 LBS ADD 15% FACTOR OF SAFETY=8,970 LBS WEIGHT OF STRUCTURE WALLS=(2)(5'+3.67')(4')(8"/12")(150 PCF)=6936 LBS BASE=(5')(5')(1.5')(150 PCF)=5,625 LBS 15" RCP=(3.14)(0.625-2)(8"/12")(150 PCF)=-123 LBS WEIR=(3.67')(8"/12")(1')(150 PCF)=-367 LBS STRUCTURE WEIGHT=12,071 LBS > 8,970 LBS WT. OF TOP SLAB=(5')(5')(8"/12")(150 PCF)=2,500 LBS Table it Clay Lin& Spiteffitabbins (ai1 : VADCR, 1999). T,Rert IPermeabdity Test Method Unit, ASTM 10-2434 Cm/sec Specifization 1. x 10,6 Plasticity I index of C118y ATM ID- 23/424 Not less than 1 UgUid Limit of Clay, ASTM ID-2.2.16 Not less than TO Clay Particles Massing Clay Compaction AST IM ID-422 ' ASTIM ID-221.E Clot less than 3tO 95 of standard proctor density° FINISHED GRADE /Z SOIL /Z 2' THICK CONCRETE ANTI -SEEP COLLAR MINIMUM SIDE CLEARANCE ANTI -SEEP COLLAR (USE ON CULVERTS THROUGH BERMS) NOTES: 1. No rocks or boulders 3" or larger to be used in backfill. 2. All backfill material shall be suitable native or imported material. 3. Backfill shall be tamped in 6" lifts in berms. 4. Achieve 95% compaction (Standard proctor) in berm areas. UNDISTURBED BACKFILL d ..d SPRING LINE LOW LINE • 6' �,D, OF PIPE' 6' TOP OF BERM IIIIII� IIIII= -11 11= GRADING & EROSION CONTROL NOTES 1. ALL MATERIALS AND METHODS OF CONSTRUCTION SHALL BE IN ACCORDANCE WITH THE HARNETT COUNTY AND THE STATE OF NORTH CAROLINA STANDARDS AND SPECIFICATIONS. 2. CONTRACTOR SHALL HAVE NORTH CAROLINA ONE CALL (811) TO LOCATE ALL EXISTING UTILITIES PRIOR TO BEGINNING CONSTRUCTION. 3. CONTRACTOR SHALL VERIFY THE LOCATION AND DEPTH OF ALL EXISTING UTILITIES AND NOTIFY THE ENGINEER OF ANY DISCREPANCIES OR CONFLICTS PRIOR TO BEGINNING CONSTRUCTION. 4. ALL CONSTRUCTION SHALL CONFORM TO A.D.A. STANDARDS. 5. THE CONTRACTOR SHALL BE RESPONSIBLE FOR CONTACTING, COORDINATING, AND PAYMENT FOR ALL NECESSARY LOCATING SERVICES INCLUDING INDEPENDENT LOCATING SERVICES. THE CONTRACTOR SHALL HAVE ALL EXISTING UTILITIES LOCATED AT LEAST 48 HOURS PRIOR TO BEGINNING DEMOLITION, EXCAVATION, OR ANY OTHER FORM OF CONSTRUCTION. THE CONTRACTOR SHALL IMMEDIATELY NOTIFY THE OWNER'S REPRESENTATIVE OR ANY DISCREPANCIES OR CONFLICTS. 6. EXISTING IMPROVEMENTS DAMAGED OR DESTROYED BY THE CONTRACTOR DURING CONSTRUCTION SHALL BE RESTORED OR REPLACED TO ORIGINAL CONDITION AND TO THE SATISFACTION OF THE OWNER'S REPRESENTATIVE AT THE CONTRACTOR'S EXPENSE. 7. THE CONTRACTOR SHALL BE RESPONSIBLE FOR ENSURING ALL PERMITS, INSPECTIONS, CERTIFICATIONS, AND OTHER REQUIREMENTS WHICH MUST BE MET UNDER THIS CONTRACT ARE OBTAINED. 8. IF DEPARTURES FROM THE PROJECT DRAWINGS OR SPECIFICATIONS ARE DEEMED NECESSARY BY THE CONTRACTOR, DETAILS OF SUCH DEPARTURES AND REASONS THEREFOR SHALL BE SUBMITTED TO THE OWNER'S REPRESENTATIVE FOR REVIEW PRIOR TO CONSTRUCTION. NO DEPARTURES FROM THE CONTRACT DOCUMENTS SHALL BE MADE WITHOUT THE EXPRESS WRITTEN PERMISSION OF THE OWNER'S REPRESENTATIVE. 9. THE ENGINEER DISCLAIMS ANY ROLE IN THE CONSTRUCTION MEANS AND/OR METHODS ASSOCIATED WITH THE PROJECT AS SET FORTH IN THESE PLANS. 10. THE STREETS IN FRONT OF THE PROJECT WILL BE KEPT CLEAN AT ALL TIMES OR A WASH STATION WILL BE REQUIRED. VARIES* 20' SPILLWAY ELEV. VARIES* TOP OF BERM 1 � Q _IIIIII IIIIII V MINVARIES 11= II=1111111= III- ="IIIIFIIIII- IIIII=1 IIIII=IIIII=1�11111= II CLASS B RIP -RAP 18" THICK 10' WIDE TOP OF DAM (269.0) 6' VEGETATED FOREBAY DAM 100 YR STORM WSEL SHELF (6:1 SLOPE) (TOP ELEV 264.5) (ELEV 267.63) CONTROL STRUCTURE (SEE DETAIL THIS SHEET) - - - - - - - - - - - - - - - - - - - - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ - - - - - - - - - 6' VEGETATED j NORMAL WATER LEVEL (264.5) SHELF sl (6:1 SLOPE) OA F - - - - - - - - - - - - - INLET PIPE r, FOREBAY O SEDIMENT CLEAN OUT MAIN POND 10- (260.0) A ry F CLASS B RIPRAP PROVIDE 6" CLAY LINER. 63.0 LF OF 24" POND BOTTOM (259.0) INSTALL 6" OF TOPSOIL ABOVE CLAY LINER AT VEGETATED SHELF. LINER MUST BE INSTALL 12" ABOVE NORMAL WATER LEVEL WET DETENTION BASIN DETAIL ANTI -SEEP - GEOFABRIC UNDERLAYMENT *SIDE SLOPE SHALL BE MAX. 3:1 (GEOTEX 1001 OR SPILLWAY DEPTH X 3 = SIDE SLOPE LENGTH EQUIVALENT) EMERGENCY SPILLWAY N TS NORTH STORMWATER PLAN SCALE: 1 = 20' (DRAWING SCALED FOR 24x36 INCH PLOTS) 0 20 40 60 80 GRO�A � R�\'fECTU/Zy� o /O Z CERT. NO. '- r 353 g n • ZO�lH CARO�-��P. �'��EIGH,NG FNC ENGINEERING ICENSE NO. P-0803 .� SEAL .r p U w 0 U w < Ua� 0 Q z QJ 0 _ 100 in 0) tOr-N N . -0O�N+' DLNIIV)-C Ld w O rn0)@ z 0'LU-- L U Nz0)0) to z w-0 �O w -C � J •�U 0 w i U �-IYO Lew EMN OEM z W Oz U J Of z O� _ O N Z 0- 2 Of 0O W T + Z F_ U U 0 a z� Brawn Svo Y Checked By SRN DATE: 30 JUN 2021 REVISED: 1116 SEP 2021 2 09 NOV 2021 3325 FEB 2022 w SITE PLANS N J STORMWATER PLAN a Job Code HCSS1