SW3231103_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
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