SW4231202_Plansheet - SCM Detail_20231229 (2)

6' VEGETATED SHELF PLANTING SPECIFICATIONS: Planting and After-Care Requirements:
MAIN POOL STAGE-STORAGE TABLE ALLOCATION CHART FOR WET DETENTION POND #2 MINIMUM REQUIRED PLANTINGS: 50 PLANTS/200 SF SHELF AREA (per NCDENR STORMWATER BMP MANUAL) "In accordance with the requirements in articles GS 143-215.25A and 143-215.26 of the
6' VEGETATED SHELF AREA: = 1,440 SF (SHELF AREA AROUND FOREBAY EXCLUDED FROM AREA CALCULATIONS) Soil amendments should be incorporated at the end of the site development process to prevent sediment from ELEVATION AREA (SF) VOLUME (CF) CUM. VOLUME (CF) ON-SITE DRAINAGE AREA TO POND #2 6.27 ACRES MINIMUM REQUIRED PLANTINGS: 50 PLANTS/200 SF * 1,440 SF = 360 PLANTS (4" container) entering the BMP facoility. The BMP should be planted and mulched immediately after amending the soil to NC Dam Safety Law and NC Administrative Code 15A NCAC 2K .0200, the Regional
stabilize the site as soon as possible.OFF-SITE DRAINAGE AREA TO POND #2 0.06 ACRES Engineer in the Winston-Salem Regional Office of the NC State,S Land Quality Section
722 1,687 0 0 SHALLOW WATER PLANTS Newly installed plant material requires water in order to recover from the shock of being transplanted. Be sure TOTAL DRAINAGE AREA = 6.33 ACRES
TOTAL DRAINAGE AREA TO POND 2 6.33 ACRES Iris Virginica (common name: Blue Flag Iris): 60 plants (4" Container) that some source of water is especially g y p p p has been / will be contacted for the detenuinatlon of whether the proposed dam 1S PROPOSED BUA TO POND = 3.19 ACRES (50.39%)
# provided, es eciall Burin dry periods. This will reduce lent loss and provide the
722.50 2,015 926 926 Sagittorio Loncifolia (common name: Bulltounge): 60 plants (4" container) new materials with a chance to establish root growth.Pontederio Cordato (common name: Pickerelweed): 60 plants (4" container) governed by or exempt from the Dam Safety Law." PERMANENT SEDIMENT STORAGE:
723 2,358 1,093 2,019 ON-SITE BUA TO POND #2 3.19 ACRES In general, fall and winter are optimal for planting in North Carolina. There are some exceptions. Shallow water PERMANENT STORAGE REQUIRED: MIN. 6" IN PERMANENT POOL AND FOREBAY
SHALLOW LAND PLANTS plants should be installed between April 1 and July 15. STORAGE PROVIDED IN FOREBAY: 722 TO 722.50 => 124 CF
724 3,092 2,725 4,744 OFF-SITE BUA TO POND #2 0.00 ACRES Asclepias incarnate (common name: Swamp Milkweed): 60 plants (4" container) STORAGE PROVIDED IN MAIN POOL: 722 TO 722.50 => 926 CF
TOTAL BUA TO POND #2 3.19 ACRES Lobelia Cardinalis (common name: Cardinal Flower): 60 plants (4" container) Minimize or eliminate the use of pesticides and fertilizers. A one-time application of fertilizer is allowable to
725 3,890 3,491 8,235 Hibiscus coccineus (common name: Scarlet Rose Mallow): 60 plants (4" container) help establishment. TOTAL FOREBAY VOLUME: 2,640 CF
PLANTS & MIXTURES PLANTING RATES/ACRE PLANTING DATES MAIN POOL VOLUME @ ELEVATION 727: 16.803 CF
726 4,750 4,320 12,555 Note: Any shallow water and shallow land herbaceous plant from the NCDEQ Stormwater BMP Manual A minimum two year warranty is required. At the end of the first year, and again at the end of the second
MAXIMUM BUA TO WET DETENTION POND #2 3.19 ACRES (50.39%) may be substituted for the above mentioned plant species on the vegetated shelf. A minimum of year, all plants that do not survive must be replaced. NOTE: TALL FESCUE 00-150 Les AUG. 15-OCT. 15 % FOREBAY VOLUME TO PERMANENT POOL VOLUME: 2,640 CF / 16,803 CF = 15.71%
726.50 5,083 2,458 15,013 three (3) different species of plants is to be used. The herbaceous plant species specified above THE PERMANENT WET DETENTION POND SHOWN ON THIS PLAN (LOW MAIN iENANCE) FEB. 15-MAY 1
are common locally and readily available for purchase. All plant species used (if they differ from If best professional practices show that mowing is needed to maintain optimal plant health, mow according to PERMANENT WATER QUALITY POOL:
best professional practices. MUST BE STABILIZED WITHIN 14 DAYS OF THE COMPLETION OF TALL FESCUE 200-250 LBS AUG. 15-OCT. 15
ENGINEER STATEMENT OF POND AND DAM SAFETY (HIGH MAINTENANCE) FEB. 15-MAY 1
727 5,781 2,716 17,729 those shown above) are to be reported to Engineer for approval prior to planting. AVERAGE DEPTH CALCULATION (EQUATION 3 PER NCBMP MANUAL)
If plants are dead, diseased, or dying, determine the source of the problem, remedy it, and replace affected CONSTRUCTION. AREAS AND VOLUME TAKEN FROM BOTTOM OF SHELF TO TOP OF
STAGE-STORAGE TABLE Total Number of Plants Specified: 360 plants plants. TALL FESCUE& 100 LBS& FEB. 15-MAY 1 THE SEDIMENT STORAGE ELEVATION AND EXCLUDES FOREBAY VOLUME & AREA:
THE STORMWATER POND AND DAM SHOWN ON THIS PLAN SATISFIES PERIMETER OF PERMANENT POOL: 240'
FOR ENTIRE POND STORAGE ABOVE THE PERMANENT POOL ELEVATION KOBE OR KOREAN LESPEDEZA 20-25 LBS(SCARIFIED SEED FOR SPRING AUG, 15-OCT. 15
REQUIREMENTS OF THE NORTH CAROLINA STATE DAM SAFETY LAW OF 1967 Soil Specifications: If weeds are present, remove weeds, preferably by hand. If a pesticide is used, wipe it on the plant rather than &UNSCARIFIED FOR LATE FALL&WINTER)
AS AMENDED THROUGH 1995 AND THE RULES AND REGULATIONS ASspraying. MAX WATER DEPTH OVER SHELF: 0.50'
ELEVATION AREA (SF) VOLUME (CF) CUM. VOLUME (CF) The soil mix must be uniform and free of stones, stumps, roots, or other similar material greater than two TALL FESCUE& so Les& Nov. 1-FEB. 1 WIDTH OF SUBMERGED PORTION OF SHELF: 3.0'
PRESENTED IN THE NORTH CAROLINA ADMINISTRATIVE CODE TITLE 15A, inches. WET DETENTION POND CONSTRUCTION SEQUENCE: SERICEA LESPEDEZA 60 LBS/ACRE (UNSCARIFIED) VOLUME OF SHELF(Vshelf): 0.50 x 0.50' x 240' x 3.0' = 180 CF
727 7,839 0 0 SUBCHAPTER 2K - DAM SAFETY. EVEN IN THE CASE WHERE THE DAM 1. EXCAVATE POND TO BOTTOM ELEVATION OF POND.
SHOWN ON THIS PLAN IS DETERMINED BY THE STATE TO BE EXEMPT FROM Soil texture of the mix should be loamy sand with no more than 10% clay (USDA soil texture classification) TALL FESCUE& 60 LBS& JULY&AUGUST MAIN POOL VOLUME (EXCLUDING 12" SEDIMENT STORAGE): 16,803 CF
727.50 8,841 4,170 4,170 THE ABOVE NOTED DAM SAFETY REQUIREMENTS, I, AS THE QUALIFIED 2. GRADE DAM EMBANKMENT, 20' EMERGENCY SPILLWAY, AND VEGETATED SHELF. GERMAN MILLET 30 Les AREA AT BOTTOM OF SHELF: 5,083 SF
DESIGN ENGINEER, STATE THAT THE POND AND DAM ARE DESIGNED TO BE A minimum organic content of 10% by dry weight for areas planted with woody species and 5% for turf areas. NOTE: 3. INSTALL RISER, BARREL, TRASH RACK, AND RIP-RAP PAD AS SHOWN ON PLANS. OR SUDANGRASS (MILLET&SUDANGRASS MUST BE KEPT AT 10-12") AVERAGE DEPTH = (16,803 CF - 180 CF) / 5,083 SF = 3.27'
728 9,363 4,551 8,721 SAFE AND ADEQUATE FOR THE PROTECTION OF PUBLIC HEALTH, SAFETY, STORMWATER RUNOFF FROM THE ENTIRE WET DETENTION 4. REMOVE ALL ACCUMULATED SEDIMENT FROM THE POND AND FINAL GRADE THE
The PH should be between 5.5 and 7.0. If the PH falls outside of this range, it my be modified with lime to TALL FESCUE& 7o Las& Nov. 1-JAN. 30
WELFARE, AND DOWNSTREAM PROPERTY. I UNDERSTAND THAT THIS STATE- POND. ENSURE THE INSIDE BOTTOM AND SIDE SLOPES OF THE POND ARE 3.27' WATER QUALITY POOL AVE. DEPTH, 51% B.U.A.
729 10,450 9,907 18,628 VENT AS THE DESIGN ENGINEER SHALL NOT RELIEVE THE OWNER OR increase the PH or iron sulfate and sulfer to lower the PH. The lime or iron sulfate must be mixed uniformly POND'S DRAINAGE BASIN WILL BE CONVEYED TO THE WET RYEGRAIN 25 LBS(RYGRAIN MUST BE KEPI AT 10-12") REQUIRES 1.74332% SURFACE AREA
into the soil prior to use. COMPACTED APPROPRIATELY OR LINED SO THAT THE INFILTRATION RATE OF WATER
OPERATOR OF THE POND AND DAM FROM THE LEGAL DUTIES, OBLIGATIONS, DETENTION POND VIA A NETWORK OF STORM SEWER PIPES 1.743327 730 11,594 11,022 29,650 OUT OF THE POND IS LESS THAN 0.01 IN/HR. COMMON BERMUDAGRASS 8 LBS(HULLED) APRIL 15-JUNE 30 REQUIRED = 100 x 6.33 AC x 43,560 SF/AC = 4.807 SF
AND LIABILITIES ARISING FROM SUCH OWNERSHIP OR OPERATION. Planting soil can be amended on-site soil material or soil brought in from off-site. In either case, it must 15-20 Les(UNHULLED) FEB. 1-MARCH 30
meet the requirements specified and a soil analysis furnished stating that the soil meets all the requirements THAT WILL BE DESIGNED AND INSTALLED PER NCDOT 5. ALL ACCUMULATED SEDIMENT MUST BE REMOVED FROM POND AND THE POND IS TO TOP ELEVATION (AVE. DEPTH = 3.27')= 727.00
731 12,794 12,194 41,844 before any planting can begin. STANDARDS AND SPECIFICATIONS. THE STORM PIPE BE RESTORED TO ORIGINAL DESIGN VOLUME PRIOR TO CONVERTING THE POND SEEDBED PREPARATION PROVIDED = 5,781 SF (AREA EXCLUDES FOREBAY)
732 14,051 13,423 55,266 PERMANENT WET DETENTION POND NOTES: FROM AN EROSION CONTROL DEVICE TO A WET DETENTION POND. 1. STRIP THE AREA TO BE SEEDED TO A MINIMUM DEPTH OF 4-6 INCHES.
The following criteria apply to vegetation in and around the wet detention pond: NETWORK WILL ENTER THE POND AT AN ELEVATION EQUAL 6. SEED AND STABILIZE POND ABOVE THE PERMANENT POOL AND DAM EMBANKMENT 2.REMOVE ALL LOOSE ROCK, ROOTS, ETC. LEAVING SURFACE SMOOTH AND UNIFORM.
733 15,365 14,708 69,974 1. THE ENGINEER'S CERTIFICATION OF COMPLETION WILL BE REQUIRED PRIOR TO THE (°) The dam structure, including front and back embankment slopes, of the pond shall be vegetated with TO THE PERMANENT POOL ELEVATION. 3.APPLY SEED, AGRICULTURAL LIME, FERTILIZER,AND SUPERPHOSPHATE UNIFORMLY AND TEMPORARY WATER QUALITY STORAGE VOLUME-
FINAL turf grass; trees and woody shrubs shall not be allowed; and SLOPES. MIX WITH THE SOIL RATES ARE BELOW').
FINAL PLAT OR CERTIFICATE OF OCCUPANCY. THE STORMWATER CONTROL IS TO BE ( FOR 51% B.U.A.
(b) The vegetated shelf Shall be planted with a minimum of three diverse Species of herbaceous, native 7. INSTALL 6 VEGETATED SHELF PLANTINGS AS SPECIFIED ON THE PLAN. 4.SEED ON A FRESHLY PREPARED SEEDBED AND COVER THE SEED LIGHTLY NTH SEEDING
FOREBAY STAGE-STORAGE TABLE INSPECTED TO ENSURE IT IS FUNCTIONING AS DESIGNED AND HAS FULL DESIGN VOLUME vegetation at a minimum density of 50 plants per 200 square feet of shelf area. EQUIPMENT OR CULTIPACK AFTER SEEDING. Rv= 0.05+ (0.009)(51)
PRIOR TO ISSUANCE OF THE FINAL CERTIFICATE OF OCCUPANCY.
5.MULCH IMMEDIATELY AFTER SEEDING AND ANCHOR MULLCH. RV= 0.509
ELEVATION AREA (SF) VOLUME (CF) CUM. VOLUME (CF)
2. THE TOWN OF BERMUDA RUN AND THEIR ASSIGNS HAVE RIGHT TO ACCESS THE -RATES: AGRICULTURAL LIMESTONE- 2 TONS/ACRE VOLUME REQ'D.= 1.0 * Rv * DA
722 131 0 0 STORMWATER CONTROL(S) FOR INSPECTION OR MAINTENANCE, AS NECESSARY. FERTILIZER- 10-10-10 AT 800-1000 POUNDS/ACRE WHERE DA = DRIANAGE AREA (ACRES)
SUPERPHOSPHATE- 500 POUNDS/ACRE OF 20%ANALYSIS SUPERPHOSPHATE
723 365 248 248 3. THE PROPERTY OWNER (OR HOMEOWNER'S ASSOCIATION) IS RESPONSIBLE FOR MULCH- 1.5 TONS SMALL GRAIN STRAW/ACRE(APPROXIMATELY 60 BALES) VOLUME REQUIRED = (1.0 x 0.509 x 6.33 x 43,560)/12 = 11,696 CF
ANCHOR- CRIMP STRAW INTO SOIL WITH MACHINE OR TACK WITH LIQUID ASPHALT
MAINTAINING THE STORM WATER CONTROL(S) ACCORDING TO THE APPROVED MAINTENANCE AT 400 GALLONS/ACRE OR EMULSIFIED ASPHALT AT 300 GALLONS/ACRE. BOTTOM ELEVATION = 727.00
724 617 491 739 PLAN AND DIRECTION OF THE CITY OF GREENSBORO. FO) 6A)l
TOP ELEVATION
725 934 776 1,515 2640 CF 73
PROVIDED = 29.650 CF
726 1,317 1,126 2,640 (SEEDETA
FILTER DIAPHRAGM RELEASE RATE:
COLLECTOR PIPES TO BE ASTM C-33 SAND (IF DAM IS BUILT
CAPPED ON BOTH ENDS 3�0 FROM FINE GRAIN OR CLAYEY SOILS) MAXIMUM HEAD = 730-727 = 3'
10.5 � 4-INCH SOLID WALLED SCH 40 PVC PIPE AVERAGE HEAD= 3' / 3 = 10'
PERMANENT WATER QUALITY 4-INCH NO. zo DISCHARGES TO DAYLIGHT IN DISSIPATOR. HOLE DIAMETER= 2"
POOL ELEVATION: 727.00 \ \ / / \ �\ \ \\ SLOTTEDOR PIPE H 40 PVC VARMIT SCREEN TO BE PLACED ON ENDS AREA OF HOLE= 0.02 SF
3. AVERAGE FLOW THROUGH ORIFICE = 0.6(0.02 SF)(SQURT(2x32.2x1')
0 A R/P-RAPAPfFO/V V V A (2xDIA)
5.0' WIDE TOP OF BAFFLE ELEV.=726.00 \ AVERAGE FLOW THROUGH ORIFICE = 0.096 CFS
\ \ (SEE DETA/L) \ In ` DETENTION TIME = 29,650 CF / 0.096 CFS = 308,854 SEC.
FOREBAY = 2,640 CF \ \ \ I 4.5' 1.5' 4.5 DETENTION TIME = 308,854 SEC. / 3600 SEC./HR = 85.79 HRS
(3xDIA) DIA CAP (3xDIA) TEMP. WATER QUALITY DETENTION TIME: 3.57 DAYS
S o
2 \ ELEVATION OF WEEP HOLE INVERT = 727.00
FOREBAY ENTRANCE TO
PERMANENT POOL °� COMPACTED a BE 1.0' DEEPER THAN Q� \ \ (2xDIA) PRINCIPLE SPILLWAY:
16,803 CF EARTH BAFFLE THE FOREBAY EXIT w �O ��
_ _ \ RISER= 36" CAP RISER
5'1 SLOP �^ - O \ BARREL=18" CAP BARREL
E \
BOTTOM OF BOTTOM OF ` \ - FILTER DIAPHRAGM DETAIL NOTE: A 18" BARRELL HAS BEEN CHOSEN IN ORDER TO REDUCE THE POST-DEVELOPMENT
POND: 722.00 FOREBAY: 722.00 \ \ NTS 4-INCH No. 20 24-HOUR STORM EVENTS, UP TO AND INCLUDING THE 10-YEAR STORM EVENT,
SLOTTED SCH 40 PVC
\ O W \ COLLECTOR PIPE 4-INCH SOLID WALLED SCH 40 PVC PIPE OUTFLOW TO AT OR BELOW THE RESPECTIVE PRE-DEVELOPMENT RATES.
��5 DISCHARGES TO DAYLIGHT IN DISSIPATOR.
FOREBAY NOTE: VARMIT SCREEN TO BE PLACED ON ENDS EMERGENCY SPILLWAY:
IF SEDIMENT ACCUMULATES IN THE FOREBAY IN A \ 7 \ 32 �33 \ \ DESIGN STORM= 100 YR
MANNER THAT REDUCES ITS DEPTH TO LESS THAN \ l /
COLLECTOR PIPES TO BE EMERGENCY SPILLWAY TYPE: 20' WIDE GRASS LINED WEIR
75 PERCENT OF ITS DESIGN DEPTH, THEN THE 2 0 �37 \ CAPPED ON BOTH ENDS
FOREBAY SHALL BE CLEANED OUT AND RETURNED \ > ELEVATION OF WEIR = 731.50
FOREBAY BAFFLE SECTION DETAIL TO ITS DESIGN STATE. \ 49
v� \ 28 >29 PLAN VIEW CONTROL SECTION: GRASS LINED WEIR
N Ts F� �2> \
4:1 SIDE SLOPES
BOTTOM WIDTH= 20'
p APAP O \ 722 26s DOWNSTREAM SLOPE FLOW DEPTH = 0.42'
723
DISCHARGE = 17.95 CFS
A 2A �P S F VELOCITY OVER WEIR LIP - 1.97 FT SEC
2.0 FREEBOARD AND SETTLEMENT= 1.08'
54" DIA C.A.P. \ v\ ' �� v � v 725 TOP OF DAM ELEVATION= 733.00
TRASH RACK \ \-726 FILTER DIAPHRAGM EXIT SECTION: GRASS LINED TRAPEZOIDAL CHANNEL
\ \ \
' \ \ �25 \ ASTM C-33 SAND (IF DAM IS BUILT DISCHARGE -17.95 CFS
6" X 6" SPACING
FROM FINE GRAIN OR CLAYEY SOILS)
4:1 SIDE SLOPES
54 DIA. ON BARS \ �lA \ 724 33.33% SLOPE
723 36"f7/SEHW/ v /01 FLow BOTTOM WIDTH = 20'
TOP GRATE 722 \ 54"T1?A5H17AC/f n= 0.030
CONSIST OF 1/2" � \\
SOLID ALUMINUM BAR \ ��A BOTTOrL7 0 - o DEPTH= = 6. /
OEPO/UD \ VELOCITY= 6.73 FT SEC
4-INCH SOLID WALLED SCH 40 PVC PIPE
DISCHARGES i0 DAYLIGHT IN DISSIPATOR.
6 O.C. EACH WAY ) \ 23 =722.0, _ ' VARMIT SCREEN TO BE PLACED ON ENDS
\ 26 \ 1 ANTI-FLOTATION CALCULATION
RISER VOLUME= 5' X 7.07 SF = 36 CF
\ \ / 1 2(' �• 4-INCH N0. 20
ANTI-VORTEX 28 'S \ SLOTTED SCH 40 PVC 4" PVC UNDERDRAIN BARREL VOLUME= 10' X 1.77 SF = 18 CF
SUPPORT PLATES 10 \\ �2� O \ - - - \ COLLECTOR PIPE INVERT IN FILTER=829.90
VOLUME DISPLACED => 54 CF
BOUYANCY FORCE= ( 54 CF)(62.4 PCF)= 3,370 LBS
TOP VIEW ISOMETRIC SHOWING -FFS VOLUME OF CONCRETE REQUIRED= 3,370 LBS/ (150-62.4)= 38.50 CF
�� �� j� ) SIZE= 7' X 7' X 2' = 98 CF
ANTI-VORTEX SUPPORTS /PERMA/VE/VTf'Cy61<-FF5 ��y \ 3 - `0 FACTOR OF SAFETY = 2.55 ..... 98 CF / 38.50 CF = 1.99
54" DIA C.A.P. �33 F/LTER FILTER DIAPHRAGM DETAIL
TRASH RACK 54" DIA' =5,78>SF y�
MAW-RQ0L�I/OL UME_ �� �� D/4PHf1AGM Nrs
ANTI-VORTEX
SUPPORT PLATES tl2" 24„2" RISER
LOCKING HARDWARE -TO STABILIZE TRASH 36" C.A.P. v
GUARD (4 REQUIRED) RISER ALUMINUM ANGLE FF v15\ � HYD RAELOW HYD ROG RAP H ROUTING RESULTS :
BOLT WELDING TO \ \ _ -
ANTI-VORTEX PLATE F,� \ f7/P-RAPAPRON 1 -yr Pre - Development Fowrate : 3 .576 cfs
36" DIA. DETAIL ��� v v �SEEDETA/L� y
FF5 S v 1 -yr Inflow : 13 . 56 cfs
FOR SECURING TRASH RACK
SIDE VIEW TO RISER BARREL �FF �v vv 1 -yr Outflow : 0 . 1 74 cfs
1 -yr Max , Water Surface Elevation : 729 .81
20'W/DEGRASS LOVED
TRASH RACK DETAIL EM��s EOEr�i�jWAY� s�FFs � FF�FF�
NTS 54" TRASH RACK ALUMINUM ANGLE & ROD 2 -yr Pre - Development Eowrate : 6 . 442 cfs
COVER (6" O.C.) TRASH RACK WITH ANTIVORTEX DEVICE F' \ / / FF
2 -yr Inflow : 18 . 09 cfs
10' MIN. 2 -yr Outflow : 0 . 885 cfs
COMPACTED EARTH 2 -yr Max . Water Surface Elevation : 730 .07
TOP OF BASIN ELEV = 733.00
100 YR - 24 HR ELEV. = 731.92 1.08 EMERGENCY SPILLWAY ELEVATION: 731.50 _ _ _ _ _ _ _ _
------------------------------------------------------- _ _-------------
10 YR - 24 HR ELEV. - 730.63 __ FILTER DIAPHRAGM y p
TOP OF TRASH r r e e v e o men o w r a e . cfs
2 YR=24 HR_ELEV.= 730.07
RACK 731.00 12"
----------------------_------------------------------------------------------------ 24" m 'S (SEE DETAIL)
TOP OF RISER ELEV 730.00 2" DEWATERING ORIFICE W BOTTOM OF TRASH 9 1 2" QQF (013 1 0 -yr Inflow : 30 . 48 c f s
1 YR - 24 HR ELEV. = 729.81 TRASH GUARD EXTENDING 3" RACK = 729.00 `� m
10 -yr Outflow : 14. 25 cfs
O BELOW AND ABOVE ORIFICE 36" CAP �1 m TOP=t728.92
rl� RISER PROJECT TITLE:
10 -yr Max . Water Surface Elevation : 730 . 63 THETOWNESATBERMUDARUN
_ Mo, PHASEI
2" DEWATERING ORIFICE INVERT ELEV = 727.00 TOP OF SHELF: 727.50 0
v 4" PVC UNDERDRAIN
FILL RISER WITH
BOTTOM OF SHELF: 726.50
INVERT IN FILTER=724.12 DAVIE COUNTY FARMINGTON TOWNSHIP
�
CONCRETE 1 0 0 -y r Pre - Development E I o w ra t e : 32 . 82 c f s
CAP BARRELInflow :
BERMUDA RUN,NORTH CAROLINA
7
ELEVATION 25.00 a 58.00 LF OF 18" 18" INVERT OUT:t724.00 OWNER/DEVELOPER:@ 1.72% 1 0 0 - r I n f l o w : 5 0 .0 8 cfs s HENSON REALTY,LLC
TOP OF CONCRETE
O ANCHOR = 723.00 y 249 DEARDOM WAY
FLANGE CONNECTION WITH 1 0 O y r Outflow . 3 3 . 3 2 cfs CHAPEL HILL NC 27516
WITH NEOPRENE GASKET (TYP) 336-707-9799
RIP-RAP PAD (SEE DETAIL) �
NV. = 725.00 i _
®OTTOM OF CAP CONNECTION TO BE WELDED 18" INVERT IN FILTER 1 0 0 r Max . Water Surface E e V a t o n 7 31 •9 2
s 12 = 724.42 y 00 •
RISER 722`�D ���� ��������������������������������������������������� Top o f Dam Elevation : 7 3 3 .0 0 •• c ARo••
TO OF PERMANENT SEDIMENT STORAGE: 722.50 p +E �ans
6„
= 722.00 7' SQUARE BOTTOM OF CONCRETE BOTTOM=t721.42 4" PVC UNDERDRAIN Freeboard Provided : 1 .08 + e e j %
BOTTOM OF BASIN ELEV
ANCHOR = 721.00 INVERT = +724.00 + ]C>lgIl]C>lee]L°><ng, Inc A ;
34, -Since 1974 1 035014
I Engineers Surveyors Planners� 1 1 �
4" SOLID WALLED SCH 40 PVC 6499DnnndasDdve Gree s oro NC2 �� ♦ 1 1-I/-23 I UAN
(4) 24" X 6" STEEL PLATES WELDED PIPE @ 0.50% SLOPE FIRM LICENSE#C-®n68 ���'����.
Phone [phone] Fos 336-854-88 6 �
(T�`♦�
NOTE: SECURELY IN PLACE o �� PROJECT: 763-30 DESIGN BY: DF DRAWN BY: DF '�1�A. F��#*�
SOIL COMPACTION OF HAUNCHES 6 �v H:\0WI 30 I0I9 Prn,. a\Paul MIIYm\9.rtnudu Run\Orawinpe\Phave I\Bartnuda Run Cone vclion Plane 3.0-Walerehed.dwq
BELOW 18" CAP BARREL TO BE <9� GRAPHIC SCALE SHEET DESCRIPTION:
CUT-OFF TRENCH, EXCAVATED NOTE: WET DETENTION
INSPECTED, VERIFIED, AND CERTIFIED N THEN BACKFILLED AND COMPACTED MDC 11: VEGETATION
24 TO 95% STANDARD PROCTOR WITH 20 0 10 20 40 80 POND #2 DETAIL
BY A GEOTECHNICAL ENGINEER. THE FOLLOWING CRITERIA APPLY TO VEGETATION IN AND AROUND
4-.0' LOW PERMIABILITY SOIL THE WET POND:
SCALE: 1"= 20' DATE: NOVEMBER 17, 2023
12 (A) THE DAM STRUCTURE OF THE POND, INCLUDING FRONT AND REVISIONS: SHEET NO.:
BACK EMBANKMENT SLOPES, SHALL BE VEGETATED WITH
WET DETENTION POND #2 SECTION TH R U BERM AND S P L L WA YS SHALL NOT BE ALLOWED.NON-CLUMPING TURF GRASS; TREES AND WOODY SHRUBS 1 incIN
h FEET_ ) ft. C6'2
NTS