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HomeMy WebLinkAboutSW3231103_Plansheet - SCM Detail_20240717 LEGEND DET I^/EIL I p ER ROAD EXISTING PROPERTY LINE nI ' - - (5 0 ' V V PUgLIC EXISTING EASEMENT R/W EXISTING RIGHT-OF-WAY CI-101 72.1 LF 36" CLASS IV RCP W/ 0-RING GASKETS AND (2) /` \ANTI-SEEP COLLARS 0 0.50% CI-ZO4 EXISTING STORM PIPE / / $$ NORTH „ RCP $$ W EXISTING WATER LINE \ \` 2 // 665 SAN EXISTING SANITARY SEWER LINE / 83.0 LF 42" CLASS IV RCP �� / 663 -W/ 0-RING GASKETS AND (2) �� 0 EXISTING STREAM cc 662 / ANTI-SEEP COLLARS ® 0.50% 61 / 664 CI-Z01 \ EXISTING WETLAND LU o PROPOSED RIP-RAP APRON / / 659 663 a W1=9' / �- 62 Z a a W2=23' 658 / 661 PROPOSED ROADWAY CENTERLINE O cUn � J La=20' /657 6 N o m a a a a c m D50=8" 56 55 / 58 z ss PROPOSED CURB & GUTTER W o m In m m o 54 -.,, PROPOSED CONCRETE o Z o 20 a� 653 Z N a Z �o o� 657 a• Q o � cfl n 656 / 52 PROPOSED STRIPING a Z Z Z PERMANENT POOL- ` - � � III / 5554 S a aZ a�651 a- Z GG O M . . PROPOSED RIGHT-OF-WAY Z W 2 2 2 W `Oco a- Q o � o o z Q _-_ ` Lu 5'-WIDE 65g / \ o o LL O LL LL o O .50 FOREBAY 652- > o 3 0 3 3 0 0 653 \ PROPOSED BUILDING Lu a FOREBAY DAM / 648� , 651 a a a PROPOSED FENCE o Z > Z > > Z z 647� w BOTTOM INV. = 641.00 FES-200 / ` ^ 640.00 / w cn a i 6 INV. OUT=645.00 646� =w SEDIMENT STORAGE 5 `�-- - - - �o•t� CLEANOUT = 640.00 49 PROPOSED RETAINING WALL W 0 0 0 0 0 0 0 0 ---- �` IN ` OUT=645.00 / 45- 3 648 \ o N N o O O O O O O O 644�- 647 / N PROPOSED STORM PIPE 643, w co -646--- N 0 N N I - 4 ® Z FOREBAY � 641_ � 6" � PROPOSED YARD/GRATED INLET 644 / � BOTTOM INV. = 641.00 / 642 / ® PROPOSED CURB INLET SEDIMENT STORAGE 640.50 1 - 6 p`L _ SPILLWAY ELEV. = 645.00 641 �� 2p CLEANOUT = 640.00 - -66��� _ TOP OF BERM ELEV. = 646.00 / / \ \ © PROPOSED STORM MANHOLE LOT 1 - , ` - 0 �6 RIP-RAP D50 = 9" 40 LF OF 12" CLASS 350 640.50 N V r, ' 0 0 EXTEND RIP-RAP TO TOP OF 0f1 ` N _� 6�R BERM; INSTALL RIP-RAP ON TOP DUCTILE IRON DRAIN WITH 640.00 I co OF MIRAFI-50OX 12" GATE VALVE 645--, N INV. IN = 641.00 � INV. OUT = 640.50 640.50 Z PROP. SCM MAINTENANCE , � � � � O N AND ACCESS ESMT ' -- - - - -- \ , _ / � 0M MAIN POOL SPILLWAY ELEV. = 645.00 40 LF OF 12" CLASS 350_� TOP OF BERM ELEV. = 646.00 // \ a O BOTTOM INV. = 640.50 cc ti -co co - DUCTILE IRON DRAIN WITH RIP-RAP D50 = 9" t '� cfl cfl co co- - SEDIMENT STORAGE 1 , \\ �y U N C° to ��-c4 `° Ln to co `� 653 to ,n_ 0)-00 n co � � � 12" GATE VALVE CLEANOUT = 640.00 EXTEND RIP-RAP TO TOP OF / 6�2 -� co(o (o `� �+d�d.r INV. IN = 641.00 PERMANENT POOL = 645.00 BERM; INSTALL RIP-RAP ON TOP �6��� PROPOSED RIP-RAP APRON 1 1 O C INV. OUT = 640.50 OF MIRAFI-50OX h5 W1=10.5' O OR 1 I 2 La 22 5 N x q / 6 11 = L U D50=9" 1 -4-a -a U 0 N cM °i - ----- - - -- -- - - PROPOSED EMERGENCY SPILLWAY O M _- ELEV. = 649.00 / / 1 1i .> O WIDTH = 15' / \ 13 M - { D50 = 15" �/ I i 0) N ----- - Sm - - -- - 6'X6' RISER /���� 6�a �l C - 9z RIM=648.00 •� UJ 666 - o a - - INV. OUT 642.00�� , 6513 �6k6 I / WET POND DESIGN PARAMETERS Q STORM DRAINAGE - 10 YR 24-HR STORM EVENT O a E - 6�a ` - - - - - � OF I // PIPE NETWORK Q w O 6 6 - DRAINAGE AREA - 18.15 ACRES Q IMPERVIOUS AREA - 8.12 ACRES r < ' II I ) / // . IMPERVIOUS % - 45% 0 6 /� \ / / •rl M 6 ___ - - -- - _ \ II / / / , // REQUIRED TREATEMENT VOLUME (GOOSE CREEK RULES) ' PRE 1YR STORM EVENT VOLUME = 24,485 FT3 - I / co / / / ` POST 1YR STORM EVENT VOLUME = 63.599 FT-REQUIRED TREATEMENT VOLUME (POST-PRE) = 39,114 FT3 pub ---------------643--- _ ' I I / c° / / / )) h PROVIDED TREATEMENT VOLUME = 40,055 FT3 M / REQUIRED TREATEMENT VOLUME-STAGE ELEVATION = 646.57 PROVIDED TREATEMENT VOLUME-STAGE ELEVATION = 646.60 FES OCS-1(INV. OUT=641.00 J PROP. SCM MAINTENANCE AND ACCESS ESMT / `O 4 / `O cp 0 O Z PROPOSED RIP-RAP AP ' / / c) > > O APRON FROM \� / / V \ EROSION CONTROL PHASE, \ CLASS IV RCP \ CONTRACTOR TO ENSURE RIIP-RAP W/ O- 30"RING GASKETS AND \ IS CLEAN ONCE SITE IS STABILIZED AN � \ ANTI SEEP COLLARS ® 1.8% BUFFER PROP. 10' WETLAND \� �� PROPOSED RIP-RAP APRON \ l / / c •+ Z � / a W1=7.5' / / / Q EXIST. WETLAND W 18.55' ll W J O La D50=6" SCALE IN FEET = O 0 20 40 LL ­3 EXISTING TRASH RACK Z 1YR-24HR 2YR-24HR TO REMAIN LL W ELEV: 646.68 ELEV: 646.85 25YR-24HR W J 10YR-24HR ELEV: 648.50 �i REMOVE MATERIAL 25YR-24HR 50YR-24HR ELEV: 647.91 TO CONVERT SEDIMENT 100YR-24HR C TOP ELEV. = 650.00 ELEV: 648.50 ELEV: 648.95 ANTI-VORTEX "+ BASIN TO BMP WET POND FOREBAY WEIR EROSION ELEV: 649.40 o EROSION TOP ELEV. = 650.00 50YR-24HR N CONTROL 100YR-24HR ELEV. = B45.00 CONTROL 2YR-24HR ELEV: 648.95 MATTING 15' WIDE EMERGENCY OVERFLOW WEIR 10YR-24HR 8V. B49.40 MATTING ELEV: 646.85 50: 648.HR C ON SLOPE BOT. ELEV. = 649.00 ELEV: 647.91 RIP RAP SPILLWAY SECTION ON FILTER FABRIC ON SLOPE ELEV: 648.95 c 1YR-24HR 100YR-24HR -------------------------- -------------- - -- 1 INVE ORIFICE ------------ -- -------------- - -- -______=DAM WIDTH VARIES (SEE PLAN)-__ _-_______________________ 3� ELEV. s4s.sa ELEV. 649.40 _ _ _-- _6' PLANTING SHELF- 60 --------------_ _______________________-___-- 25YR-24HR 1 4 . - - -------------------- ------------------ _- __ _ ---------------------- ELEV 64850 IPERM P = - - - 3- ---------------------- 5- 10YR-24HR ------------------ --------------------- TOP OF SHELF TOP OF 6" SEDIMENT FOREBAY DAM TREATEMENT VOLUME ELEVATION = 646.57 ELEV: 647.91 2 ELEV. 646.00 �- ti, _ --------------------- RISER ELEV. 648.00 m ELEV. = 645.50 1 - STORAGE ELEV. = 640.50 = 2YR-24HR - ------------ ----------------------------------- ----------- ------- TOP OF SEDIMENT STORAGE TOP OF SHELF 46.85 -------------------- a ELEV.OF 6444.SHE.550 Er ELEV. = 641.00 6:1 2'1 7� ELEV = 645.50 ELEV. -24H STEPS ON OUTSIDE OF 6" 6" 12" FOREBAY ENTRANCE BOTTOM TOP OF V. SEDIMENT fiB 1YR-24HR STRUCTURE STARTING AT d INV. = fi40.50 ELEV. = 640.00 STORAGE ELEV. = 640.50 BOTTOM OF SHELF ELEV: 646.68 V- INV. = 641.00 g* BOTTOM ELEV ELEV = 644.50 -------------------- PERMANENT POND TO a 12" DUCTILE IRON DRAIN PIPE 640.00 THREADED CLEANOUT TOP (16" O.C.) LL LO n BOTTOM OFFJ W/ 12' M.J GATE VALVE & BOX FOREBAY EXIT BOTTOM 6' PLANKTING SHELF CAP IN TOP SEE PLAN VIEW FOR LOCATION a a J TREATEMENT VOLUME Z L) c WET DETENTION POND SECTION (WIDTH) ELEV. 646.57cm WET DETENTION POND SECTION (LENGTH) PERMANENT POOL TEE ELEV. 645.00 N M 6i NOT TO SCALE NOT TO SCALE ELEV. 645.00 a B" TEE W/ 2.75"0 ORIFICE 5' X 5' CLEAR 6'X6' CONCRETE PRECAST BOX r INSIDE 3 a PROPOSED OPEN TOP PROPOSED 30"0 RCP W/ U W/ TRASH RACK O-RING GASKETS ® 1.8R W N Q, CONTRACTOR MAY FLATTEN-OUT 0 } p B N� 100YR-24HR TOP WIDTH 10' 6" TEE yy/ INV our=s42.00 m m DAM SECTION WITH EXCESS ELEV: 649.40 TOP OF BERM ELEV. = 650.00 MATERIAL WHERE FEASIBLE 2.75'0 ORIFICE Z OW 50YR-24HR U ELEV: 648.95 PROPOSED 6' X 6' PRECAST CONCRETE TOP ELEV. = 648.00 1/4 / FOOT c Z 0 25YR-24HR f� EROSION CONTROL MATTING NOTES. LLI O h ELEV: 648.50 c a N V __________________________ ON BACKSLOPE OF DAM 1. EXISTING OUTLET CONTROL STRUCTURE FROM SEDIMENT BASIN TO '� Wz�n _________ I -------------------------- Z �Gi BEFORE YOU D101 n 2 REMAIN FOR BMP WETPOND. 0 1 x , 10YR-24HR�r-------------------------- C° x 0.;a0 o, CALL 1-SW-632-4242 r c� c� ELEV: 647.91 - ------ +j� 2. CONTRACTOR TO POST A CONSPICUOUS SIGN STATING WHO IS Q 0. 'n N.C. ONE-CALL CENTER Lu N I TREATEMENT VOLUME ELEVATION = 646.57 EXISTING GRADE a ------------------ RESPONSIBLE FOR THE REQUIRED MAINTENANCE AND ANNUAL J 3 EXISTING 1" DIA. ANCHOR BOLTS a a a ITS THE LAW! a 2YR-24HR PERMANENT POOL ELEV. = 645.00 6:1 INSPECTION OF THE WET DETENTION POND. U (SEE ANCHORING DETAIL THIS SHEET) c N ELEV: 646.85 N 6" TEE W/ NORTH CAROLINA BOARD OF EXAMINERS FOR 3. WET DETENTION PONDS USED AS SEDIMENT BASINS DURING THE ENGINEERS AND SURVEYORS LICENSE NO.C-3035 1YR-24HR 2.75"4 ORIFICE ti CONSTRUCTION PERIOD TO BE FULLY CLEANED OUT PRIOR TO USE 3" MIN ELEV: 646.68 INV = 645.00 :fo AS A STORM WATER MANAGEMENT FACILITY 7' X 7' EXISTING 6" MIN. WASHED STONE V 4. CONTRACTOR TO RIP/SCARIFY WET POND INVERT AND RE-COMPACT OR OTHER SUITABLE MATERIAL (2) PROPOSED B' x B' x 1.5' TO 100% STANDARD PROCTOR AFTER SEDIMENT REMOVAL AND PRIOR PROP. CONCRETE BASE W/ NO. PROPOSED CONCRETE ���`�, CA �� p o}0 d THICK CONCRETE ANTI-SEEP TO ESTABLISHING THE PERMANENT WET POND. (4) 5 BARS EXTENDING ANTI-FLOTATION PAD �� C` �i W p COLLARS 4 BAR O 12' O.C. BOTH WAYS THROUGH BOX �\ ESS/ / � O Q 1- W SEE OUTLET CONTROL STRUCTURE DETAIL THIS SHEET 5. CONTRACTOR SHALL PROVIDE AS-BUILT SURVEY PERFORMED BY A 6' N ' 10' NC LICENSED SURVEYOR UPON COMPLETION OF WET POND. SURVEY OUTLET CONTROL STRUCTURE SECTION :'e� 9t •.� N 0 W 'o I MIN TO BE PROVIDED TO & REVIEWED BY CIVIL ENGINEER IN ORDER TO NOT TO SCALE = U 0 d PROPOSED 3GA RCP PROVIDE CERTIFICATION OF THE STORMWATER MANAGEMENT FACILITY. STEPS ON OUTSIDE OF - = Q � 0 d WITH 0-RING GASKETS PROPOSED KEYWAY CIVIL ENGINEER WILL SUBMIT PROJECT CERTIFICATION TO THE TOWN = SEAL = p d Q STRUCTURE STARTING �+ DEPTH VARIES UPON FINDING PROJECT IS IN CONFORMANCE WITH THE DESIGN = 043168 _ I AT PERMANENT POOL o A PLANS. CONTRACTOR WILL NOT BE ABLE TO RECEIVE FINAL = � DRAWING NO.: N OUTLET CONTROL STRUCTURE PLAN To TOP (16- O.C) r.� CERTIFICATE OF OCCUPANCY FOR THE BUILDING UNTIL THE �2j'• :_` WET POND BERM SECTION STORMWATER MANAGEMENT FACILITY IS CERTIFIED. NOT TO SCALE C51 0 a NOT TO SCALE ��s NG I N v- N6. ALL DISTURBED AREA SHALL RECEIVE PERMANENT SEEDING/GRASSING. 0 �IIIIIG���'\` 07/17/24 a � 6 __I DETWEILER ROAD �63 cos / I LEGEND \� \\\��664 / (5�' PUBLIC R/W) �0 ; - - EXISTING PROPERTY LINE 60 663 \I N / - - EXISTING EASEMENT H 662 l CI-406 / I 61 , R/W EXISTING RIGHT-OF-WAY ---------------- 76.5 LF 42" CLASS IV RCP 60 / / / / ^ / - - EXISTING STORM PIPE 55-NORTH w/ 0-RING GASKETS AND (2) 658 ANTI-SEEP COLLARS 0 0.50% 657 I / � cow 0 0 ,---------- � W EXISTING WATER LINE 78.7 LF 36" CLASS IV RCP I •- _ 656 I W/ 0-RING GASKETS AND (2) � , SA N EXISTING SANITARY SEWER LINE PROPOSED RIP AP APRON 55 I ' ANTI-SEEP COLLARS 0 0.50% ` -0 F ' - EXISTING STREAM W1=10.5' 654 I I \ � 0 5 FES-300 W2=25.5' 653 I \ C -9 . U z INV. OUT=(45.00 - l > La-22' I 652 I \ � D ' _-_- -_-_ EXISTING WETLAND W o D50=9" 7777777T� ------ 51 ;;o FES-400 I a 50 PROPOSED ROADWAY CENTERLINE 0 cUn w m J Q J J CO � \ �47 I I, INV. OUT=645.00 PROPOSED RIP-RAP APRON PROPOSED CURB & GUTTER N p o m o 0 646 W1=9, z ' LOT 67 " 4..: a W Z J m m m W J \ I W2=23' \ I ' N Q a Q ..w.,.:.; PROPOSED CONCRETE a o z o cfl� \ 6445 I La=D5020' rh ' PROPOSED STRIPING Z W Z Z <O C 640.50- I I , ¢ o o G643 I I -- - PROPOSED RIGHT-OF-WAY o o o G 640.10 o w u w w 0 641 W1pp,M �640.5o I CI-407 15" RCP ° ° o ° o 0 0 ° CI-408 g 00- PROPOSED BUILDING a 0 Lu � � � FOREBAY co ^ ro a m co � W � 3 � 3 3 0 FOREBAY I I I N d `O / PROPOSED FENCE ' BOTTOM INV. = 641.00 I I \ ^ _� t° o 0 0 Z > Z > > Z Z SEDIMENT STORAGE I PERMANENT POOL I I \� 640.00 ���� 12 t° \ PROPOSED RETAINING WALL N N N N N N N N .}mil cp w o 0 0 0 0 0 0 0 CLEANOUT = 640.00 I ELEV. = 645.00 \ - _ p N N N N (fl SO \ Q (O (O r N N O V r ----- - PROPOSED STORM PIPE \ I �6'QQXQ Q� Q ' \ .------- o o 0 0 0 0 0 0 \ 40 LF OF 12" CLASS 350 I II I SPILLWAY ELEV. = 645.00 QQ ,Q rn / TOP OF BERM ELEV. = 645.00 / ® PROPOSED YARD/GRATED INLET z N N 640.50 �1 DUCTILE IRON DRAIN WITH ---- - - - \� // 6 ti I RIP-RAP D50 = 9" I \\ 1 0° 12" GATE VALVE 1 N ® PROPOSED CURB INLET / 66�ey EXTEND RIP-RAP TO TOP OF \ -- - - I N \ `� INV. IN = 641.00 � \ e`O INV. OUT = 640.50 1 BERM; INSTALL RIP-RAP ON TOP \ PROPOSED STORM MANHOLE 6 � 'I OF MIRAFI-500X 640.50 _ - \ V 1 M 40 LF OF 12" CLASS 350 04 DUCTILE IRON DRAIN WITH �� \\ I"I co `06�1 1 I I 12" GATE VALVE �� \ �, N 00 SPILLWAY ELEV. = 645.00 I INV. IN = 641.50 \ \ Z INV. OUT = 640.50 TOP OF BERM ELEV. - 646.00 I I \\� � \ -- - - \\ \ � � � �i RIP-RAP D50 = 9" MAIN POOL �� ----- - \ \\ ` O N EXTEND RIP-RAP TO TOP OF BOTTOM INV. = 640.50 O c j BERM; INSTALL RIP-RAP ON TOP SEDIMENT STORAGE I I ��\ - a \\ \\ \\ \ a O OF MIRAFI-500X CLEANOUT = 640.00 I I L - -_ _ - -- - U \� \\ \\ c j PERMANENT POOL = 645.00 I I \ \ \ U N FOREBAY C I BOTTOM INV. = 641.00 ---- - M \\ \\ 1 1 C O oo SEDIMENT STORAGE _-- \ \ \ \ � O o O� \ CLEANOUT = 640.00 \ \ \ 1 \ ,_1 x q LL 645-� �� �4`� I I I I I I I I I I I \ \ - ti W I I I I I I I I \ \ \ \ DCI-409 \ 1 6'X6' RISER I I I I \ \\ \\ \\ \ \ _ 0, \ N 0 N / I RIM=648.00 I� i \ \ \ \ \ I �I \\ I INV. OUT 643.00 V / \ \ \ \ \ \ WET POND DESIGN PARAMETERS "� 0 rn 30 RCP a E \\ TOjO O I I /�� I l II \\ \\ \\ STORM DRAINAGE - 10 YR 24-HR STORM EVENT W 0 a PROP. SCM MAINTENANCE \ Fe�R� I / I ,I II \I \\ \\ \\ --_--- - _ -� \ \\ PIPE NETWORK O AND ACCESS ESMT \ / I / I I I I \ \ \ _ ----- - p \\ _ _ (f� SS SS DRAINAGE AREA - 21.72 ACRES Q s`SQ00 I / I\ I I I 6 -- - - /���� N IMPERVIOUS AREA - 11.47 ACRES ~ry r \\ 9 - V v IMPERVIOUS % - 53% O �6Q� I \ I 643 --��� ,- �� \ \ .r1 �M 42.6 LF 36" CLASS IV RCP I 644 / N _ \\ �� \ \ \ REQUIRED TREATEMENT VOLUME (GOOSE CREEK RULES) W/ O-RING GASKETS AN (2) I I I I __4 \\ \ '\\ ��� \ \\ PRE 1YR STORM EVENT VOLUME = 27,263 FT3 ANTI-SEEP COLLARS 0 2.3% I I I / 646-- \ \ \ \ \� POST 1YR STORM EVENT VOLUME = 86.832 FT-1 I / \ 647 REQUIRED TREATEMENT VOLUME (POST-PRE) = 59,569 FT3 (FES OCS-2 I I \I \ I 648 ----- - \\ \� \\ \\ PROVIDED TREATEMENT VOLUME = 63,238 Fr INV. OUT=6 Q.00 I I I 6____ REQUIRED�. V vv vv v V v � \� 6s\ \\ REQUIRED TREATEMENT VOLUME-STAGE ELEVATION = 646.51 loom \s rno PROVIDED TREATEMENT VOLUME-STAGE ELEVATION = 646.60 PROPOSED PROPOSED RIP-RAP APRON FROM RIP-RAP APRON \ V `50 EROSION CONTROL PHASE, I W1=7 5' V A \ \ \ 65PRO1 I \ \ Z CONTRACTOR TO ENSURE RIIP-RAP I W2=18 5' \ / \ \ 652 ' ANDPACC ACCESS IS CLEAN ONCE SITE IS STABILIZED 1 I \ La=16' D50=6" - \ \ _ PROP. 10' WETLAND _ .. �'~ \ \\ � \\\ 0 BUFFER �� PROPOSED EMERGENCY SPILLWAY l a a ~ ELEV. = 649.00 W J EXIST. WETLAND WIDTH = 15' \ \\ \ II \\\ D50 = 15" SCALE IN FEET 0 = Z ' I \ 0 20 40 � � EXISTING TRASH RACK /� z 1YR-24HR 2YR-24HR TO REMAIN LL W ELEV: 646.64 ELEV. 646.81 I OYR-24HR _ DAM WIDTH VARIES _ J M REMOVE MATERIAL 25YR-24HR 50YR-24HR (SEE PLAN) ELEV. 647.66 ELEV: 649.20 N TO CONVERT SEDIMENT ELEV: 648.30 ELEV- 648.72 EROSION N �' EROSION TOP ELEV. = 650.00 BASIN TO BMP WET POND 2YR-24HR ANTI-VORTEX TOP ELEV. = 650.00 CONTROL 100YR-24HR CONTROL IOGYR-24HR FOREBAY DAM ELEV: 646.81 50YR-24HR ELEV. 649.20 MATTING 15' WIDE EMERGENCY OVERFLOW WEIR 10YR-24HR ELEV: 649.20 ELEV. = 646.00 MATTING ELEV. 648.72 ON SLOPE ELEV- 647.66 ON SLOPE BOT. ELEV. = 649.00 RIP RAP SPILLWAY SECTION ON FILTER FABRIC V: 646.HR 50YR-24HR I36"NV X 6" ORIFICE 'w \ -------------------------- ------------ - -- ---------------------------- -- ------------------------ 3,•� ELEV: 646.64 25YR-24HR ELEV: 648.72 INVERT ELEV. 646.50 V, -------------- --- -- ELEV: 648.30-------==--6 PLANTING SHELF------------------- ----------------------------- -- --------------------- ----------------------------- ------------------- _ ________ _ _ ----------------------- � ��--- - -- -- _ _ ___-- 25YR-24HR ---------------- -- -- ---------------- --------�RE7KTEME CLIME-ELEVATfOFI=-64�51--- ------------ - -------------------- -- _ -_-_-_-__ ELEV: 648.30 PERM POOL ELEVATION = 645.00 jT ______________ _---------------------_ - TOP OF SHELF TOP OF 6" SEDIMENT FOREBAY WEIR ? ------�TREATEMENT £-ELEVATION=6".51-- ----- 10YR-24HR v ELEV. = 645.50 STORAGE ELEV. =-640_50---------- -----ELEV._ 645.00- _ M = 4 . ELEV: 647.66 RISER ELEV. 648.00 --------- --- ---- ------ - TOP OF SEDIMENT STORAGE TOP OF SHELF 2YR-24HR -------------------- o BOT. OF SHELF ?:T 7� a ELEV. = 644.50 6" 6" ELEV. = 641.00 6:1 ELEV = 645.50 ELEV: 646.81 STEPS ON OUTSIDE OF 6" INV. = 640.50 12" 6:1 ------ STRUCTURE STARTING AT FOREBAY ENTRANCE BOTTOM -------------------- ELEV. = 640.00 BOTTOM OF SHELF 1YR-24HR ---------- PERMANENT POND TO I INV. = 641.00 6* BOTTOM ELEV ELEV = 644.50 ELEV: 646.64 TOP (16" D.C.) 0 12" DUCTILE IRON DRAIN PIPE W/ 12' M.J GATE VALVE & BOX TOP OF s" SEDIMENT STORAGE ELEV. = 640.50 640.00 THREADED CLEANOUT SEE PLAN VIEW FOR LOCATION LL d � _j 6 PLANTING SHELF Q J �V FOREBAY EXIT BOTTOM CAP IN TOP TREATEMENT VOLUME Q V N BOTTOM OF BASIN ELEV. 640.50 I~_ ELEV. 646.51 Z w ELEV. = 640.00 WET DETENTION POND SECTION (WIDTH) N N WET DETENTION POND SECTION (LENGTH) PERMANENT POOL TEE ELEV. 645.00 M NOT TO SCALE NOT TO SCALE ELEV. 645.00 a 6" TEE W/ 3.50"0 ORIFICE 5' X 5' CLEAR 6'X6' CONCRETE PRECAST BOX N INSIDE �j� 3 a PROPOSED OPEN TOP PROPOSED 36"0 RCP W/ U W/ TRASH RACK 0-RING GASKETS 0 2.3R '^ N CONTRACTOR MAY FLATTEN-OUT 0 } p B N� 100YR-24HR TOP WIDTH 10' 6" TEE yy/ INV our=s43.00 00 DAM SECTION WITH EXCESS ELEV- 649.20 TOP OF BERM ELEV. = 650.00 MATERIAL WHERE FEASIBLE 3.50'0 ORIFICE Z Y \y O w 50YR-24HR p U ti ELEV: 648.72 PROPOSED 6' X 6' PRECAST CONCRETE BOX Z TOP ELEV. = 648.00 1/4 / FOOT LLI 0 25YR-24HR - EROSION CONTROL MATTING NOTES: W O n ELEV: 648.30 N V __________________________ ON BACKSLOPE of DAM 1. EXISTING OUTLET CONTROL STRUCTURE FROM SEDIMENT BASIN TO U) w z�n _________ ______ ZOf Gi BEFORE YOU D�Ci! n 2 ____ ___ REMAIN FOR BMP WETPOND. x a a of Y . CALL 1-800-632-4242 r N U oo ELEV 647.66��TREATEMENT VOLUME ELEVATION = 646.51------ �1 �� EXISTING GRADE 2. RESPONSIBLECONTRACTOR TFOR THE REQUIRED O POST A UMAINTE OUS INANCEGN TANDGANNUAL '�WHO IS w a N.C. ONE-CALL CENTER W >_ N h ELEV 646.8R�ERMANENT POOL ELEV. = 645.00 6:1 J a a ITS THE LAW! EXISTING 1' DIA. ANCHOR BOLTS a J Q INSPECTION OF THE WET DETENTION POND. U (SEE ANCHORING DETAIL THIS SHEET) c tp NORTH CAROLINA BOARD OF EXAMINERS FOR N� 1YR-24HR B" TEE W/ 3. WET DETENTION PONDS USED AS SEDIMENT BASINS DURING THE ENGINEERS AND SURVEYORS LICENSE NO.C-3035 ELEV. 646.64 3.50"0 ORIFICE ti CONSTRUCTION PERIOD TO BE FULLY CLEANED OUT PRIOR TO USE 3" MIN 12 INV = 645.00r AS A STORM WATER MANAGEMENT FACILITI' EXISTING B" MIN. WASHED STONE OR OTHER SURABLE MATERIAL 8' X 8' 4. CONTRACTOR TO RIP/SCARIFY WET POND INVERT AND RE-COMPACT (2) PROPOSED 6' x 6' x 1.5' TO 100% STANDARD PROCTOR AFTER SEDIMENT REMOVAL AND PRIOR PROP. CONCRETE BASE W/ PROPOSED CONCRETE � `�, CA �� p o}0 d THICK CONCRETE ANTI-SEEP TO ESTABLISHING THE PERMANENT WET POND. (4) #5 BARS EXTENDING ANTI-FLOTATION �` (C` �� O w Q COLLARS BOTH WBAR ® 12' O.C. THROUGH BOX PAYSAD `\ ESSI ' //��i ` Q H w SEE OUTLET CONTROL STRUCTURE DETAIL THIS SHEET 5. CONTRACTOR SHALL PROVIDE AS-BUILT SURVEY PERFORMED BY A 6' N r U U > 10' NC LICENSED SURVEYOR UPON COMPLETION OF WET POND. SURVEY OUTLET CONTROL STRUCTURE SECTION :'e� 9t•.� N 0 w o I MIN TO BE PROVIDED TO & REVIEWED BY CIVIL ENGINEER IN ORDER TO NOT TO SCALE w U Q d PROPOSED 36"4 RCP PROVIDE CERTIFICATION OF THE STORMWATER MANAGEMENT FACILITY. WITH 0-RING GASKETS PROPOSED KEYWAY STEPS ON OUTSIDE OF = SEAL n CIVIL ENGINEER WILL SUBMIT PROJECT CERTIFICATION TO THE TOWN STRUCTURE STARTING - - p p a Q �+ DEPTH VARIES UPON FINDING PROJECT IS IN CONFORMANCE WITH THE DESIGN = 043168 = I AT PERMANENT POOL o A PLANS. CONTRACTOR WILL NOT BE ABLE TO RECEIVE FINAL = � DRAWING NO.: N OUTLET CONTROL STRUCTURE PLAN To TOP (1fi' o.C) r., CERTIFICATE OF OCCUPANCY FOR THE BUILDING UNTIL THE �2j'• :_` WET POND BERM SECTION STORMWATER MANAGEMENT FACILITY IS CERTIFIED. NOT TO SCALE C51 1 a NOT TO SCALE �s� EE� N6. ALL DISTURBED AREA SHALL RECEIVE PERMANENT SEEDING/GRASSING. /i0 ...... 07/17/24 a