SW1231201_Plansheet - SCM Detail_20240626

z
0
0
z
W
It
4' X 6' PRECAST CONCRETE STRUCTURE
TOP ELEV = 2335.0 GALVANIZED TRASH RACK =
U
3" X 36" WEIR FACING THE WETLAND TOP OF COMPACTED EARTHEN =
WEIR ELEV = 2334.25 EMBANKMENT
FELEV = 2337.0 U_
4" PVC TEE INVERT INTO 10' WIDE WEIR OPENING Q
RISER AT ELEV. = 2333.0 IN EARTHEN EMBANKMENT
INFLOW SOLID CAP TOP OF TEE ELEV = 2336.0 U)
TEMPORARY POOL = 2334.25 SIGN N LIJ
N
3:1 MAX. ( LU
LU
RIPRAP BACKED WITH TEMPORAOL 15"RY �' \ / z
FILTER CLOTHMA PERMANENT POOL = 2333.0 !\/\ i \ 1 r }
EXIT POOL STABLE OUTFALL CLASS B
3' DEEP RIP-RAP AND FILTER I \
BOTTOM OF FOREBAY @ EXIT = 2330.17 AT OUTLET CLOTH
0.5' y c �� �� 24 LF 24" HDPE '
BOTTOM OF FOREBAY * ENTRANCE = 2329.67 0"-9" BELOW PERMANENT 12" SOIL AMENDMENT OF
POOL ELEVATION SHALLOW ORGANIC MATERIAL FOR f
WATER ZONE ENHANCED PLANTING MEDIA ( x\` _ \ `\ / 0
1.5" ORIFICE _> I _ w
IN BOTTOM KEYWAY I / \ \ x \ 0
SHALLOW WATER ZONE CAP OF TEE 1 I /' \ PROPOSED WP INLET \ D
ANTI-SEEP COLLAR * I I / -_ STA 23+73.31 �\ / co
SEDIMENT STORAGE AT �- 1 \ \ Alignment - (Storm D) \ LL
/ RIM: 2331.83 / i
BOTTOM OF OUTLET INVERT ELEV. = 2331.0 I I \ �� 0
I INV IN: 2329.67 W
0.5' SEDIMENT STORAGE DEEP POOL 2 X 24" RCP OUTLET I\ ` \\
PIPES / I ��I ` I z
� � � � � I I � FOREBAY I\ � o
TYPICAL CROSS-SECTION /� I I o
SURFACE AREA = 1183 SF \
I\/
4' X 8' PRECAST CONCRETE GALVANIZED TRASH RACK PROPOSED CI-D13
RISER TOP ELEV. = 2335.0 PER MANUFACTURER / STA 23+49.43 \
//`�/`% / / //'• CONSTRUCTION NOTES Alignment - (Storm D) / \
\ \\�� TEMPORARY INUNDATION ZONE
RIM: 2335.61
�1 /\\//\\//\\//\\//\\//\\//\\//\\ 1. ALL PRE CAST STRUCTURES SHALL BE 4000 PSI CONCRETE INV IN: 2330.00 W `\ - \ --- SURFACE AREA = 3823 SF
INV OUT: 2330.00 E
2. ENGINEER MUST APPROVE ALL PRE CAST STRUCTURES
3. ALL PIPE IN STORM DRAINAGE STRUCTURE SHALL BE STRUCK �,
EVEN WITH THE INSIDE WALL AND GROUTED AND BRUSHED SMOOTH41
36 X 3"HIGH OPENING ELEV. = 2334.25 \/\/\/\/\/\/\/\/\/\/\/\/\/\ ` \ ` ' '- \
\\/\\/\\/\\/\\/\\/\\/\\/\\/\\/\\/\\/\\/\\/ ` x 1 �I \�/ /
TOP OF TEMPORARY POOL j D //\\/\\/\\/\\/\\/\\/\\/\\�/\\�/\\�/\\�/\\�/\\�/\\� `_, \ \ 1 �� �� \\ - / NON-FOR EB AY DEEP POOL
(OPEN ONE SIDE FACING WETLAND) I- /
Ilk PERMANENT POOL ELEV. = 2333.0 w / /\ \ \ \/%\ \/%\ \ \ \/ / / //%' SURFACE AREA = 829 SF
BOTTOM OF TEE = 2332.0 _ _ /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/ 36"x36" CORRUGATED --
//\//\//\//\//\//\//\//\//\//\//\//\//\//\/ ALUMINUM
' \j\\j\\j\\j\\j\\j\\j\\j\\j\\j\\j\ f 3
\//\ ANTI-SEEP COLLAR \ \ S
XX
2 X 24 RCP OUTLET PIPES , f \ \ EMERGENCY SPILLWAY
PROTECTED WITH
CLASS B RIP-RAP
/ /
INLET OUTLET
SHALLOW WATER ZONE
U Xi\\\/\\\/\ D \\\/\\\/\\\/\\\/\\\/\\\�/� KEYWAY i SURFACE AREA = 4368 SF
° D: °. . . ..° ° °
LU
CATCH BASIN AND CONCRETE ANTI-FLOTATION BLOCK
CAST TOGETHER FOR PRE-CAST MONOLITHIC BASE
M SECTION B ANTI-FLOTATION BLOCK DIMENSIONS 8'x8'x3'
PROPOSED WP Outlet Box Y \
OUTLET CONTROL STRUCTURE STA 10+00.00
I /
Alignment - (Wet Pond Outlet)
/ RIM: 2335.00 x - f-
LIJI / INV OUT: 2331.00 S 04
o NOTES: N �-
1. VOLUME REQUIRED IS THE TREATMENT VOLUME OF THE TEMPORARY POOL. TEMPORARY POOL SHALL
a CD NOT EXCEED 15" IN DEPTH. DRAWDOWN TIME FOR THE TEMPORARY POOL SHALL BE 2 TO 5 DAYS. I / 4'X8' OUTLET CONTROL STRUCTURE
2. SURFACE AREA REQUIRED IS BASED ON 15" DEPTH. FLOW PATH FROM INLET TO OUTLET SHALL BE00
MAXIMIZED IN LENGTH. -
3. FOREBAY (DEEP POOL) SHALL BE CONSTRUCTED AT THE INLET. -
w 4. LOCATE A DEEP POOL AT THE OUTLET CONTROL STRUCTURE. I
U) 5. PLANTINGS HAVE BEEN CHOSEN FROM APPROVED NCDEQ PLANTING LISTS FOR STORMWATER WETLANDS, / PROPOSED WP Outlet HW
SHALLOW WATER PLANTINGS AND TEMPORARY INUNDATION ZONE PLANTINGS. (SEE SHEET L-103) // STA 10+68.32
0 6. A SOIL ANALYSIS SHALL BE CONDUCTED TO DETERMINE PROPER SOIL AMENDMENTS TO BE ADDED TO / Alignment - Wet Pond Outlet
U) THE FIRST 12" OF SOIL DEPTH FOR HEALTHY PLANT GROWTH. g ( )
7. SEE INSPECTION AND MAINTENANCE AGREEMENT FOR WETLAND MAINTENANCE PROCEDURES. RIM: 2334.08 /
N 8. THE WETLAND SHALL BE STABILIZED WITHIN 14 DAYS OF CONSTRUCTION. I INV IN: 2331.00 N
rn 9. CATTAILS ARE NOT PERMITTED TO BE PLANTED IN OR NEAR THE WETLAND. 30' VEGETATED SETBACK (TYP) ,� _ / PROPOSED RIP-RAP
10. THE WETLAND AREA SHALL BE FULLY CLEANED OUT OF ANY SEDIMENT PRIOR TO FINAL CONSTRUCTION
AND PLANTING OF THE WETLAND. - - \ OUTLET PROTECTION /
w 11. THE DEVELOPER SHALL BE RESPONSIBLE FOR ALL OPERATION AND MAINTENANCE OF THE WETLAND /. - / `_- \ /
STORMWATER CONTROL MEASURE (SCM). _
z 12. DURING MAINTENANCE OPERATIONS, THE WETLAND SHALL BE PUMPED AS NECESSARY FOR SEDIMENT ' - -i % !� / J^ - `� -�
REMOVAL. �� 1 I +
25 TROUT STREAM BUFFER (TYP) _ ► / r -- _- r
J
CONSTRUCTED WETLAND (SCM) SCHEDULE \A\ ' _ \ `✓ 1 �� /
o DESIGN SURFACE SURFACE SURFACE SURFACE SURFACE WETLAND SURFACE DRAWDOWN
DRAINAGE VOLUME AREA AREA AREA AREA AREA AREA
LIJ
SCM AREA PROVIDED PROVIDED FOREBAY DEEP POOLS SHALLOW WATER PERMANENT POOL TEMPORARY POOL PIPE DIA. 20 0 10 20 40 PLAN
0 (ACRE) (CU.FT.) (SQ.FT.) (SQ.FT.) (SQ.FT.) (SQ.FT.) (SQ.FT.) (SQ.FT.) (INCH)
= 1 4.77 9,308 10,203 1,183 829 4,368 6,381 10,203 1.5 PROPOSED COIR MATTING WITH
cU_ GRAPHIC SCALE DIVISION VALUE = 20 FEET NATIVE VEGETATION. REFER TO SHEET
Pj G-004 FOR SEEDING REQUIREMENTS
WITHIN THE TROUT BUFFER.
of
W
N
H
W
U)
z 1 6/26/24 NC PER STORM WATER COMMENT BOBBY N. SETZER SHEET
o �\� CARO
STATE FISH HATCHERY RENOVATION AS NOTED
O°°gip ti9°°2
m °FESS/p° /
R 55 Broad Street _° a� = O� SCO PROJECT # 19-20324-02A WETLAND PLAN AND DETAILS
z Asheville, NC 28801 \ SEAL J��y OFFICE MANAGER DESIGNER
N 828.252.0575 %G'�
,�'°°a!vGINEa�'� ; NC WILDLIFE RESOURCES COMMISSION M. CATHEY N. CROOM
C= 1 43
NC Firm License # C-0459 -,,F,y y'F .� 0
', To°C A� PROJECT MANAGER REVIEWER DATE PROJECT# FUNDING#
mcgillassociates.com TRANSYLVANIA COUNTY NORTH CAROLINA
a
NO. DATE BY DESCRIPTION B. CATHEY B. CATHEY MAY 2024 19.00124 SCO #19-20324-02A