SW4231202_Plansheet - SCM Detail_20231229

6' VEGETATED SHELF PLANTING SPECIFICATIONS: Planting and After-Care Requirements:
MAIN POOL STAGE-STORAGE TABLE ALLOCATION CHART FOR WET DETENTION POND #1 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: = 1,452 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 y
ON-SITE DRAINAGE AREA TO POND 1 5.02 ACRES MINIMUM REQUIRED PLANTINGS: 50 PLANTS 200 SF 1,452 SF = 363 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
ELEVATION AREA (SF) VOLUME (CF) CUM. VOLUME (CF) # / ( ) stabilize the site as soon as possible.OFF-SITE DRAINAGE AREA TO POND #1 0.02 ACRES Engineer in the Winston-Salem Regional Office of the NC State,S Land Quality Section
739 1,700 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 = 5.04 ACRES
TOTAL DRAINAGE AREA TO POND 1 5.04 ACRES Iris Virginica (common name: Blue Flag Iris): 61 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 = 2.82 ACRES (55.95%)
# provided, es eciall Burin dry periods. This will reduce lent loss and provide the
739.50 1.965 916 916 Sagittorio Loncifolia (common name: Bulltounge): 61 plants (4" container) new materials with a chance to establish root growth.Pontederio Cordato (common name: Pickerelweed): 61 plants (4" container) governed by or exempt from the Dam Safety Law." PERMANENT SEDIMENT STORAGE:
740 2,248 1,053 1,970 ON-SITE BUA TO POND #1 2.82 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: 740 TO 740.50 => 177 CF
741 2,865 2,557 4,526 OFF-SITE BUA TO POND #1 0.00 ACRES Asclepias incarnate (common name: Swamp Milkweed): 61 plants (4" container) STORAGE PROVIDED IN MAIN POOL: 739 TO 739.50 => 916 CF
TOTAL BUA TO POND #1 2.82 ACRES Lobelia Cardinalis (common name: Cardinal Flower): 61 plants (4" container) Minimize or eliminate the use of pesticides and fertilizers. A one-time application of fertilizer is allowable to
742 3,553 3,209 7,735 Hibiscus coccineus (common name: Scarlet Rose Mallow): 61 plants (4" container) help establishment. TOTAL FOREBAY VOLUME: 3,693 CF
PLANTS & MIXTURES PLANTING RATES/ACRE PLANTING DATES MAIN POOL VOLUME @ ELEVATION 745.00: 21,051 CF
743 4,314 3,934 11,669 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 #1 2.82 ACRES (55.95%) 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 LBS AUG. 15-OCT. 15 % FOREBAY VOLUME TO PERMANENT POOL VOLUME: 3,693 CF / 21,051 CF = 17.54%
744 5,128 4,721 16,390 three (3) different species of plants is to be used. The herbaceous plant species specified above (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 THE PERMANENT WET DETENTION POND SHOWN ON THIS PLAN PERMANENT WATER QUALITY POOL:
best professional practices. MUST BE STABILIZED WITHIN 14 DAYS OF THE COMPLETION OF TALL FESCUE 200-250 Les AUG. 15-OCT. 15
ENGINEER STATEMENT OF POND AND DAM SAFETY
744.50 5,492 2,655 19,045 those shown above) are to be reported to Engineer for approval prior to planting. (HIGH MAINTENANCE) FEB. 15-MAY 1 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
745 6, 997 2,922 21,967 Total Number of Plants Specified: 366 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 KOBE OR KOREAN LESPEDEZA 20-25 LBS(SCARIFIED SEED FOR SPRING AUG. 15-OCT. 15 PERIMETER OF PERMANENT POOL: 242'
STAGE-STORAGE TABLE 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)
FOR ENTIRE POND STORAGE ABOVE THE PERMANENT POOL ELEVATION AS AMENDED THROUGH 1995 AND THE RULES AND REGULATIONS ASspraying. MAX WATER DEPTH OVER SHELF: 0.50'
PRESENTED IN THE NORTH CAROLINA ADMINISTRATIVE CODE TITLE 1 5A, 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'
inches. WET DETENTION POND CONSTRUCTION SEQUENCE: SERICEA LESPE&DEZA 60 LBS/ACRE (UNSCARIFIED) VOLUME OF SHELF(Vshelf): 0.50 x 0.50' x 242' x 3.0' = 182 CF
ELEVATION AREA (SF) VOLUME (CF) CUM. VOLUME (CF) 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): 21,051 CF
745 8,780 0 0 THE ABOVE NOTED DAM SAFETY REQUIREMENTS, I, AS THE QUALIFIED 2. GRADE DAM EMBANKMENT, 20' EMERGENCY SPILLWAY, AND VEGETATED SHELF. GERMAN MILLET 30 LBS AREA AT BOTTOM OF SHELF: 5,492 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 = (21,051 CF - 182 CF) / 5,492 SF = 3.80'
745.50 9,867 4,662 4,662 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 Les& 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 3.8' WATER QUALITY POOL AVE. DEPTH, 56% B.U.A.
746 10,432 5,075 9,737 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 1.7268% 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 1.7268%
747 11,605 11,019 20,755 OUT OF THE POND IS LESS THAN 0.01 IN/HR. COMMON BERMUDAGRASS 8 LBS(HULLED) APRIL 15-JUNE 30 REQUIRED = 100 x 5.04 AC x 43,560 SF/AC = 3,791 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 LBS(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 = 3.80')= 745.00
747.50 12,212 5,954 26,709 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 = 6,197 SF (AREA EXCLUDES FOREBAY)
748 12,833 6,261 32,971 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.
749 14,119 13,476 46,447 1. THE ENGINEER'S CERTIFICATION OF COMPLETION WILL BE REQUIRED PRIOR TO THE (a) 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-
non-clumping turf grass; trees and woody shrubs shall not be allowed; and SLOPES. Mlx WITH THE SOIL RATES ARE BELOW').
FINAL PLAT OR CERTIFICATE OF OCCUPANCY. THE STORMWATER CONTROL IS TO BE ( FOR 56% B.U.A.
750 15,461 14,790 61,237 INSPECTED TO ENSURE IT IS FUNCTIONING AS DESIGNED AND HAS FULL DESIGN VOLUME vegetation
The vegetated shelf shall it 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
vegetation at a minimum density of 50 plants per 200 square feet of shelf area. EQUIPMENT OR CULTIPACK AFTER SEEDING. Rv= O.OSt (0.009)(56)
PRIOR TO ISSUANCE OF THE FINAL CERTIFICATE OF OCCUPANCY.
5.MULCH IMMEDIATELY AFTER SEEDING AND ANCHOR MULLCH. RV= 0.654
FOREBAY STAGE-STORAGE TABLE
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
ELEVATION AREA (SF) VOLUME (CF) CUM. VOLUME (CF) STORMWATER CONTROL(S) FOR INSPECTION OR MAINTENANCE, AS NECESSARY. FERTILIZER- 10-10-10 AT 800-1000 POUNDS/ACRE
SUPERPHOSPHATE- 500 POUNDS/ACRE OF 20%ANALYSIS SUPERPHOSPHATE WHERE DA = DRIANAGE AREA (ACRES)
740 149 0 0 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 0.554 x 5.04 x 43,560)/12 = 10,136 CF
ANCHOR- CRIMP STRAW INTO SOIL WITH MACHINE OR TACK WITH LIOUID 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 = 745.00
741 557 353 353 PLAN AND DIRECTION OF THE CITY OF GREENSBORO.
TOP ELEVATION = 747.50
742 896 727 1,080
PROVIDED = 26.709 CF
743 1,292 1,094 2,174
744 1,746 1,519 3,693 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 = 747.50-745.00 = 2.50'
i 10.5' � AVERAGE HEAD= 2.5' / 3 = 0.83'
s I 4-INCH SOLID WALLED SCH 40 PVC PIPE
4-INCH NO. 20 DISCHARGES TO DAYLIGHT IN DISSIPATOR. HOLE DIAMETER= 2
\ COLLECDOSCH R PIPE 40 PVC VARMIT SCREEN TO BE PLACED ON ENDS AREA OF HOLE= 0.02 SF
1
AVERAGE FLOW THROUGH ORIFICE = 0.6(0.02 SF)(SQURT(2x32.2xO.83')
/ (1.5xDIA) AVERAGE FLOW THROUGH ORIFICE = 0.09 CFS
PERMANENT WATER QUALITY / v DETENTION TIME = 26,709 CF / 0.09 CFS = 296,767 SEC.
POOL ELEVATION: 745.00 4,5' 1.5 45 03 DETENTION TIME = 296,767 SEC. / 3600 SEC./HR = 82.43 HRS
o s \
s° _ _ _ / �� (3xDIA) DIA cAP (3xDIA) Qp TEMP. WATER QUALITY DETENTION TIME: 3.43 DAYS
5.0' WIDE TOP OF BAFFLE ELEV.=744.00
_ � � [� � ELEVATION OF WEEP HOLE INVERT = 745.00
FOREBAY = 3,693 CF / - �. l / (2xDIA) FLOW PRINCIPLE SPILLWAY:
2l� o oo - - V i >U RISER= 36" CAP RISER
BARREL=18" CAP BARREL
FOREBAY ENTRANCE TO
PERMANENT POOL COMPACTED o BE 1.0' DEEPER THAN /BOTTOM
*°° ��O \ \ s FILTER DIAPHRAGM DETAIL
Q
COMPA NOTE: A 18" BARRELL HAS BEEN CHOSEN IN ORDER TO REDUCE THE POST-DEVELOPMENT
21,051 CF ^� EARTH BAFFLE THE FOREBAY EXIT GJ / \ / 4-INCH No. 20
a \ 9/J� / NTS 24-HOUR STORM EVENTS, UP TO AND INCLUDING THE 10-YEAR STORM EVENT,
6: J '� �� SLOTFED SCH 40 PVCSLOPE r/ /� / >�. / / COLLECTOR PIPE 4-INCH SOLID WALLED SCH 40 PVC PIPE OUTFLOW TO AT OR BELOW THE RESPECTIVE PRE-DEVELOPMENT RATES.
BOTTOM OF __0_F s V ����� � / DISCHARGES N DAYLIGHT IN DISSIPAiOR.
POND: 739.00 FOREBAY 740.00 \ �� i O \ / ' - VARMIT SCREEN TO BE PLACED ON ENDS DESIGN STORM= 100 YR
EMERGENCY SPILLWAY:
COLLECTOR PIPES TO BE EMERGENCY SPILLWAY TYPE: 20' WIDE GRASS LINED WEIR
FOREBAY NOTE: / OQ /�O / / CAPPED ON BOTH ENDS ELEVATION OF WEIR = 748.50
IF SEDIMENT ACCUMULATES IN THE FOREBAY IN A s j��/ PLAN VIEW CONTROL SECTION: GRASS LINED WEIR
�
MANNER THAT REDUCES ITS DEPTH TO LESS THAN / J
75 PERCENT OF ITS DESIGN DEPTH, THEN THE / �• 1 1 �j0 >19 \ 4:1 SIDE SLOPES
FOREBAY SHALL BE CLEANED OUT AND RETURNED �4 \ / BOTTOM WIDTH= 20'
/ Q N s l PERMANENT POOL
FOREBAY BAFFLE SECTION DETAIL
TO ITS DESIGN STATE. �� 1 > g) DOWNSTREAM SLOPE FLOW DEPTH = 0.36'
NTS / Q R� 45 �45 =6 >97SF 3 DISCHARGE = 14.12 CFS
/ `O` �� \� MA/NPOOL VOLUME- VELOCITY OVER WEIR LIP = 1.83 FT/SEC
1
� ����� �F �►� MIN FREEBOARD AND SETTLEMENT= 1.14'
2 ) / TOP OF DAM ELEVATION= 750.00
54" DIA C.A.P.
TRASH RACK 1� �4� \ / GM EXIT SECTION: GRASS LINED TRAPEZOIDAL CHANNEL
�Y/ / / CN AISTMRC I33HSAND (IF DAM IS BUILT DISCHARGE -14.12 CFS
6 X 6' SPACING / Y ' �� FROM FINE GRAIN OR CLAYEY SOILS)
BOTTOM OF POND i 9 SO / /
54" DIA. ON BARS 3 - - =739.00 33. SIDE SLOPES
1 � � � / 33.33% SLOPE
-36"R/Sf7R W/
�S D IDTH 20'
54"T1?ASHRACK / I FLOW BOTTOM W =
TOP GRATE n= 0.030
CONSIST OF 1/2"
DEPTH=
SOLID ALUMINUM BAR /
6 O.C. EACH WAY /,�2 EARTHEN ` / / ` / VARMIT SCREEN To BE PLACED ON ENDS VELOCITY= 6.28 FT SEC
1 DISCHARGES TO DAYLIGHT IN DISSIPATOR.
4-INCH SOLID WALLED SCH 4 V I
A -BA TH ANTI-FLOTATION CALCULATION
) , ! / RISER VOLUME= 4' X 7.07 SF = 29 CF
FOREBAY I j1 A° AJ / 4-INCH No. 20 4" PVC UNDERDRAIN BARREL VOLUME= 10 X 1.77 SF = 18 CF
ANTI-VORTEX 3s 693 CF - - CLOTTED SCH 40 PVC
SUPPORT PLATES � � i I '1 , / � - � � / / / COLLECTOR PIPE INVERT IN FILTER=829.90 VOLUME DISPLACED => 47 CF
(a5'EED
,ETA/LJ / A> - - - BOUYANCY FORCE= ( 47 CF)(62.4 PCF)= 2,933 LBS
TOP VIEW ISOMETRIC SHOWING , - VOLUME OF CONCRETE REQUIRED= 2,933 LBS/ (150-62.4)= 33.48 CF
s- s � '�., > �� > ;:
ANTI-VORTEX SUPPORTS \ AS �° :' slzE= T x T x 2' = 98 CF
° A� - / _ FACTOR OF SAFETY = 2.93 ..... 98 CF / 33.48 CF = 2.93
FIL TER
54" DIA C.A.P. \ O - - sr S° A / O D/.4PHR.�GM FILTER DIAPHRAGM DETAIL
TRASH RACK 54" DIA. -� , A
- � O � �s S DTA � �
ANTI-VORTEX
SUPPORT PLATES 12"12
4 ��2 RISER 0 O - r
LOCKING HARDWARE - _ 8
�
TO STABILIZE TRASH 36' C.A.P. -----------
GUARD (4 REQUIRED) RISER s \� 0•00 - RIP-RAPAPf10N E, HYD RAHLOW HYD R OG RAP H ROUTING RESULTS :
ALUMINUM ANGLE
BOLT WELDING TO [ �� (SEE DETA/L
ANTI-VORTEX PLATE s 1 f / ) 1 -yr Pre - Development Elowrate : 2 .847 cfs
36" DIA. FOR SECURING TRASH RACK s' ��� v _ P � 1 -yr Inflow : 1 1 . 33 cfs
SIDE VIEW TO RISER BARREL 0 - 2orwrDEGAASSUNED
1 -yr Outflow : 0 . 152 cfs
�. E1VEAGENCYS,01LLWAY -� 1 -yr Max . Water Surface Elevation : 747 . 17
(SEE DETAIL)
TRASH RACK DETAIL
NTS 54" TRASH RACK- ALUMINUM ANGLE & ROD %' 2 -yr Pre - Development Elowrate : 5 . 129 cfs
COVER (6" O.C.) TRASH RACK WITH ANTIVORTEX DEVICE - - - - - - 2 -yr Inflow : 1 4. 9 7 c f s
10' MIN. 2 -yr Outflow : 0 . 494 cfs
TOP OF TRASH COMPACTED EARTH 2 -yr Max . Water Surface Elevation : 747 . 55
TOP OF BASIN ELEV = 750.00 RACK = 748.50
- - - - - - - - - - - - - - - -
O 100 YR - 24 HR ELEV. = 748.86 1.14
LC) - EMERGENCY SPILLWAY ELEVATION: 748.50 - - - - - - - -
N ---------------------10 YR - 24 HR ELEV. = 747.97
----------EMERGENCY
Y ELEVATION:
------- FILTER DIAPHRAGM 1 0 -yr Pre - Development Elowrate : 12 . 46 cfs
2 YR 24 HR ELEV.= ---- 12
--------------------------------------------------------------------------- 24" m 'S (SEE DETAIL)
TOP OF RISER ELEV = 747.50 2" DEWATERING ORIFICE W BOTTOM OF TRASH 9 12" QQF ( 1 0 -yr Inflow : 24.86 c f s
TRASH GUARD EXTENDING 3" RACK = 746.50 `� F- 1 0 -yr Outflow : 9 .96 c f s
O 1 YR - 24 HR ELEV. = 747.17
BELOW AND ABOVE ORIFICE 36" CAP r z
m TOP=t747.00 1 0 -yr Max . Water Surface Elevation 747 .97 PROJECT THE TOWNES AT BERMUDA RUN
c� RISER o M o, J PHASE 1
2" DEWATERING ORIFICE INVERT ELEV 745.00 TOP of SHELF: 745.50 0
v 4" PVC UNDERDRAIN
FILL RISER WITH
BOTTOM OF SHELF: 744.50
INVERT IN FILTER=743.10 DAVIE COUNTY FARMINGTON TOWNSHIP
�
CONCRETE TO
1 00 -yr Pre - Development Elowrate : 26 . 13 cfs
BERMUDA RUN,NORTH CAROLINA
ELEVATION 743.50 49.64 LF OF 18" INVERT OUT:t743.00
18 CAP BARREL @ 1.01 7 OWNER/DEVELOPER: HENSON REALTY,LLC
TOP OF CONCRETE
a 100 - r Inflow : 40 . 44 cfs
O ANCHOR = 741.00 y 249 DEARDOM WAY
FLANGE CONNECTION WITH 1 0 O y r Outflow - 28 .01 cfs CHAPEL HILL NC 27516
WITH NEOPRENE GASKET (TYP) � °/�°/�°/�\ 336-707-9799
L NV. = 743.50 � ��X/ RIP-RAP PAD (SEE DETAIL) � � ��
OQ� ®OTTQM OF CAP CONNECTION TO BE WELDED 18" INVERT IN FILTER ����������� ����������� 1 0 0 y r Max . Water Surface Elevation : 748 .86
��
s a 12' = 743.20 �j� / /� // // //�//�//�//�//�// / ��0N C ARC
RISER = 740°00 i
TO OF PERMANENT SEDIMENT STORAGE: 739.50 �� �������� �������� ������������������ Top of Dam Elevation : 750 .00 +� Y�)�� #7 FE�S� /
6„
BOTTOM OF BASIN ELEV = 739.00 7' SQUARE BOTTOM OF CONCRETE BOTTOM=t740.20 4" PVC UNDERDRAIN Freeboard Provided : 1 , 1 4 + e e j %
ANCHOR = 739.00 INVERT = +743.00 + ]C>lgIl]C>lee]L°><ng, Inc ;
30' 11
-Since I974 A
035
I Engineers Surveyors Planners
�
4" SOLID WALLED SCH 40 PVC 6499DnnndasDdve Gree s oro NC2 ♦ 1 1-I/-23 U�
(4) 24" X 6" STEEL PLATES WELDED PIPE @ 0.50% SLOPE FIRM LICENSE#C-On68 �� ���. ' ��•
Phone [phone] Fos 336-854-88 6 � 4.
(.T�1_`♦��G I N E
NOTE: SECURELY IN PLACE o ���� PROJECT: 763-30 DESIGN BY: DF DRAWN BY: OF '''_�A. F�����
SOILCOMPACTION 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
BY A GEOTECHNICAL ENGINEER. THE FOLLOWING CRITERIA APPLY TO VEGETATION IN AND AROUND 20 0 10 20 40 80 POND #1 DETAIL
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 #1 SECTION TH R U BERM AND S P I E L WA YS SHALL NOT BE ALLOWED.NON-CLUMPING TURF GRASS; TREES AND WOODY SHRUBS 1 incIN
h FEET- ) ft. C5'2
NTS