20080433 Ver 1_Stormwater Site Plans_20080718

. ~ - W ~ . ~ •
. ;I ~ ~ Pre-Development Posi-Development SEE SHEET C2.01 FOR CONSTRUCTION SEQUENCE Storm Eveni peok Flow (cfs) Peok flow (cfs)
~ .
- J , ~ 1 66.75 48.39
. 2 90'87 72'93 EROSION CONTROL NOTES
• 5 124:52 120.91
. ~ ~ ; - - _ ~ . I. ,W~ 1 10 149.89 144.60 1. THE DENUDED AREA IS 41,62 ACRES.
~ ~ ~ 25 tt3o.GS 171.09 2. THE RECEIVING WATERCOURSE IS BRIDLE CREEK,. A TRIBUTARY OF TURKEY
~ ~
50 2oosa 1B5.aa CREEK IN THE NEUSE RIVER WATERSHED.
I~ ~ ss- - s - ` -ter. - . w 100 218.74 197.01 3. FEMA MAPPED FLOODPLAIN EXIST5 ON THIS SITE 'PER FIRM #3720074400)
DATED 5/2/06.
~ ~ \ A ~ . w it V ~ i~ \
_ ~ \ ~ ~ 4. RIPARIAN STREAM BUFFERS .EXIST ON THIS SITE AS SHOWN.
r \ \ - - 1 I
II i ~ -r ~ ~ < <j,r.~~ Ili, \ ~ ~ \ 5. CUT AND FILL SLOPES WILL BE STABILIZED WITHIN 15 DAYS DURING ANY
• \ Po PHASE OF GRADING.
6. DAVIS DRIVE AND HIGH HOUSE ROAD WILL BE KEPT CLEAN OF SEDIMENT AT
~ ~ ~ ~ \ ~ • Sp', REF ~ , ~ ALL TIMES OR A WASH STATION WILL BE REQUIRED.
- I ~ ~~I ~ ~ v ~ 7. APRE-CONSTRUCTION MEETING WILL BE REQUIRED BEFORE ISSUANCE OF A
RIGG BEE ~ - - s}, ~ ~ \ ~ \ . • GRADING PERMIT,
F M r - w - ~FER., ~ --C~- \ s 1 1 8. ALL STORM DRAIN FRAMES GRATES & HOODS SHALL BE STAMPED WITH
"pRAINS TO RIVER" IN ACCORDANCE WITH TOWN OF CARY STANDARDS.
~ ~ r . _ - _ ~ ~ ~ ~ f ~ \ ~
\ ~ ~ ~ss ~ 9. THE TREE PROTECTION. FENCING ON THIS PROJECT WILL BE INSTALLED AND
~ ~ - - ~ / - \ ~ INSPECTED BEFORE THE GRADING PERMIT IS ISSUED.
1 _ ~ I r i i / ~ ~ ~ ~ ~ \ \ ~ ~ ~ ,
~ - v f _ - \ >,y,, ~ 10. TO MINIMIZE DAMAGE TO EXISTING TREES NEAR THE INTERIOR EDGE OF
~ _ i ~ it ~ ~ ~ ~ \ \ s ~ BUFFERS AND STREETSCAPES, THE CONTRACTOR SHALL CUT MINIMUM 2~ ~ TRENCHES ALONG THE LIMITS OF DISTURBANCE, SO AS TO CUT, RATHER THEN.
r , ~ \ \ ~ ~ ~ TEAR, ROOTS.
, ~ ~ i_l ~•VV~~ ~ ~
/ - NrtP ~i t ~ _ - f / ~ III N - ~ ~ ~ ~ \ ~~ss~ 11. THE TREE PROTECTION FENCE SHALL BE MAINTAINED ON THE SITE UNTIL ALL
\ \ \ ~ ' ~ SITE WORK IS COMPLETED AND THE FINAL SITE INSPECTION PRIOR TO THE
i i F I 81~~2 = _ ~ ~ ~ ~ ~ ~ 4ENT ~ ~ ~ \V ` , , - _ / - _ ~ CERTIFICATE OF OCCUPANCY (CO) IS SCHEDULED. THE FENCING SHALL BE
1 I - - v~~ _ / E - ~ ~5 ~ I 111 - - ~ - - - - - ~ ~ ~ ' \ ~ \ ~ ~ REMOVED PRIOR TO FINAL 51TE INSPECTION FOR .THE CO. \ \
~ j i - - - - - . v ~ ` \ \ . 12. SEE SHEET C5.4 FOR SEEDBED PREPARATION.
• ` \ ~ uo \ I~\\ ~ ASS ~
- I 1 ( / - \ ~ ~ \ ~ ~ ~ , , i:\~ ~ 13. CONTRACTOR SHALL ENSURE. GRADING OPERATION.. IS CONDUCTED IN A .MANNER
II I ~ i ~ - - ,r - _ ~ ~ ~ ~ ~ \ ~ ~ THAT DOES NOT ALLOW ANY SEDIMENT INTO CREEKS: ~ ~
- fl - - - - . ~ - - - `Jii - - - ~ ~L11Vi _ \ C ~m~ - - - _7 ~ 1 ~ `
_ - _ A l , - -'=1 \ \ ~ 14. CONTRACTOR SHALL PROVIDE RIPRAP LINED TAIL DITCHES AT THE STORM ,/1,~'~ \ \ ~SS~ DRAINAGE PIPE 'DISCHARGE POINTS AS REQUIRED TO ENSURE POSITIVE
~ ; ~ - - - - , Pl, 'll - ~ ~ ~ ~ ~ ~ ~ ~r • Y l h~ ~ \ \ DRAINAGE.
7 •L~ I / ~ _
II ' ~ ~ 1 ~ ~ ~ ~ I ~ . / ~ ~ ~ ~t~// , i ~ ~ ~ ; ~ ~ ~ ~ 15. IN ADDITION TO THE TEMPORARY & PERMANENT SEEDING & MULCHING
\ \ ~ ' ~ • \ \ ` ~ \ S~ DESCRIBED IN THE CONSTRUCTION SEQUENCE, THE CONTRACTOR SHALL
~ \ ~ \ mss, CONTROL DUST BY PHASING CONSTRUCTION (WHEN FEASIBLE) AND BY WATER
3 V ~ l j ~ I, ~ ~'1 1\/ ~ r; _ ~ \ ~ SPRAYING.
,t
~ i / ~ - ~ I ~ r ~ V~ ~ _ 1 l ~ 1 ,
~ / ~r_ 1 I I I 1 / / f4f, } ~ ~ ~ ~ STQRMWATER NOTE . ' d ~ .
I ~ ~ , THE PROJECT WILL MEET ALL OF THE REQUIREMENTS RELATIVE TO BEST
EXISTING , ~ ~ MANAGEMENT PRACTICES AND ENGINEERED STORMWATER CONTROL STRUCTURES
d Ir 1 I I 11 I i , r 3 III ' . ~ l i, !'ll~ ~ ~ ~ ~ ~ WETLAND ` A5 OUTLINED IN THE TOWN OF CARY LAND DEVELOPMENT ORDINANCE (CHAPTER
- fly i , - , I I I , , , ~ - r 11~ ~ - ~ ' \ / 7, SEC. 7.3).
(OFF-SITE)
~ _ ~1v r I I EXISTING
VALLE TONE _ _ _ ~ _ _ _ ~ µ ~ _ i E EPHEMERAL STREAM BUILDING RESTRICTION FLOOD LINE NOTE
R E - ~ - _ I - - ~ ~ D i I (OFF-SITE) THE HIGHEST -BASE fL00D ELEVATION ON THE SUBJECT PROPERTY AS
~ ~ ~ ,
.r' i- DEPICTED ON FEMA FIRM #3720074400) DATED 5/2/06 IS ELEVATION 334.00
T / f i I ( ~ Ir ~IJ_, 1 _ _ /I ( o I LOCATED JUST DOWNSTREAM OF THE BOX CULVERT AT DAVIS DRIVE. ALL BUILDINGS SHALL HAVE A MINIMUM FINISHED FLOOR ELEVATION OF 336.00.
-r - w W ~ ~ 11 i
r~ ---.T -I - IT ~
l I r ~
i A i ill I,' 1 ~ .
~ ~ ~ ~ ~ ~ i i','; ~ , , ` I EXISTING 1 i , i / ~ l,I / 1, ISTING
~ I , i ~ f iii WETLAND :TLAND
3 I ~ ~ _ , N OFF-SITE ~ z, ~ _ ~',r~ n , a ~ ~ FF-SITE) STORMWATER DISSIPATOR SUMMARY BASIN SUMMARY 03/13/2008 03/13/2008
i~ / ~ I T / ~ ! , 11 f ~ f 'r ( ~i y II
~ ~ 1 1 ~ ~ I w ~ I 1 1 r I I w ~ 11 (If , I = DIMENSIONS AVG DA DENUDED RUNOFF FLOW SA SV SA SV RISER/
I i ~ ~ r I I > 1 h' ~ N STRT ~ CLASS STONE AREA COEFF 010 REO'D REQ'D BARREL POROUS L W D Rlp DIA Bosin ~ (AC) (AC) C (CFS) (SF) (CF) (SF) (CF) REO'D BAFFLES
~ I _ ~ - - - I ' ~ 1, (FT) (FT) (IN} RAp (IN) SB #1 21.08 21.48 0.40 60.88 26,519 37,944 28,800. 86,400 YES 3
I I ~ ~ ~ BMP3/ III - ~ ~ ' - ' j~, , HW 10 24 9 22 1 13 SB #2 16.10 16.10 0.40 46.50 20,254 28,980 22,050 66,150 YES 3
I ~ / - - - I l~; ~f ~ ,f , SEDIMENT I ( 11 I ~ ,~i' i~~i, BASIN 3
I I f I ~ I I I i i / Hw 160 12 6 22 t t3 SB ~3 3.1a 3.14 0,40 9.07 3,950 5,652 5,000 15,000 YES 3
i I I I II ~i I' _ ~ ~ I ' - i 1 I- ~ ~ I I~ r I I _ -o ~ f ~ ~ HW 180 35 18 27 2 23 gg #4 4.70 4.70 0,40 13.57 5,913 8,460 7,200 21,600 YES 3
1 1 I I / / ~ ~ r \ti,~~l ~1 11 l J' I 1 ~ I t2 I I© ,,r , I I 1 / t i I 1 1 ( t. HW 310 15 8 27 2 23 NOTES:
~ 1 1 1 - I 1~ I ii ~ HW 330 9 5 22 1 13 I-10 = 7.22 IN/HR, Tc - 5 MIN
~ ~ \ ~ 11f HW 340 8 4 22 1 13 FLOW 010 - C+I*A
\ o a i' ~ ~ j ( I ..1 SURFACE AREA REG D - ~J5 SF q1Q CFA
r ~ I ~ I i / / k ~ li_ HW 350 9 5 22 i 13 STORAGE VOLUME REq'D - 160G CF RER ACRE OF nENUbEn AREA FOR SB
1 W W W W r - - - 1, ~ - i , r - HW 370 12 6 22 1 13 MIN 2:1 LENGTH WIDTH RATIO t ET OF FREEBOARC IS PROVIDED FOR EACH BASIN. CLEANOUT BASIN WHEN 1/2 FULL
1 S . _ ~ I i i~ ~ ~ HW 420 36 16 22 1 13 D =DEPTH MEASURED FROM BOTTOM ELEVATION TO TOP OF DAM
1 ~ \ ~ 11 ~ ! l ~ I ~ ~ RISER/BARREL REQ'D, SEE DETAIL SHEET HW 430 12 6 22 1 13 POROUS BAFFLES TYPE AND LOCATION SEE DETAIL SHEET
HW 450 12 6 22 1 13 SB -SEDIMENT BASIN W/ RISER
W ~ 1 11 ~ ~ ~ ~ ~ - I ~ ; ~ i ~ 4 I A I~ ~A \ i t~ I
o / r 1 I V 1V \ V 'III II ~A\ _ / I ~ ~ ~I 1 I
o ~ , C I l ~ \ \ `III 1 , . ~ 1 I ~ r ~ ~ ~ A V A III 1 I, ~ ~I I V I I(( ~ ~ I ~ ~ III t - ~ I I ~ I
a ( i 1 , A ' ) ~p ~ ~ ~ ~ I I I ~
1 ~ Il I ~ I ~ A 1 I III 11y - 1 7 ~ I ~ ~ I l 1 ..I 1 I f l ~ t l 1 I ~~~inu~nrirr
M ~ l 1 ~ I I I ~ I. II
~ ~ / ~ EX STING. r' f I ' ~ I i 1 ` ~ CAROB
_ ~ l /GEM ?ERY 1 . i _~j, ~ I I ~ ~ S ~ _ `l Ili( 1 i ~ ~ 1 ~ b , g ~ ~ ~ ~ 1` ~ ' ..1.,, ' i ~ ' ~ ' l1 ~ ~ ~ J ~ ~ e e+ . . , , - ~s~ P R E~. ~~1~ RY
N ~ i ~ ,J r / - ~ / ~ (I - -
r - -ll_ i( _ _ J;`- - ~ ~ NOT APPR~,V~~/t~~~tn~~TRUCTION
I ~ l l i ~ ~ l 1 ~ ~ ~ ~ A' ~ V A V A\ ~ rn
l ~ ! \ ~ o ' ~ j 1 - ._..1
ri ~ J'" ~ ` _ - N 07-SP-114
i / I ~ ~ ~ ( _ a I DTI aNOS ~t~o sTORr`n°v~~~~,~~~~~a APPROVED
m Y~'' y, \ i ~ W 1 ~ ~ S TOWN OF CARY
GRAPHIC SCALE A roved b Date
°a % ~i ~ ioo a so ioo zoo PP Y
~ ~ yC ~ ~ Planning Date
a a,! Engineering Date 1 inch = 100 ft,
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a I 0
m o~.,,~.,,~ nata R„ np~~o„a~ s~aiP ~r n A ~ 1 1'l A f'1 ~n~nit,i~ nn~i~t~rr
F4 nv. 1\CV IJIVII vuALAW 1 TOC 1st REVIEW C
OMMENTS 01/31PMO 1" = 100' I 03 13 Drawn By Date BRADFORD WITHERS 4~C RAVEN EL SheetN°.
N 2 TOC 2nd REV EW COMMENTS / 3 MYLAR SUBMITTAL 05/08CJJ LAW 11 08 47 ENGINEERS I PLANNERS I SURVEYORS C2.0
Ic Checked By Job No. i 4 DWO COMMENTS 06/190 & EROSION C DN CONTROL PLAN 111 MacKenan Drive Cary, North Carolina 27511 tel: [phone] fax: [phone] www.withersravenel.com
TY NORTH CAROLINA w&R 2061284.01 CARY WAKE COUN
Y

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1 I ~ \ , ~ yam, _ ~ V~
1 I ~ ~ PLANT LIST
I ~ ~ A \ \ ' ~ % ~ ~ . _ _ , _ ^ QUA. KEY BOTANICAL NAME COMN COMMON NAME SIZE SPACING scREEN accESSIBLE THROUGH oooR
VENT
/ ~ / ~ 1 ~ M1'~ - ~ ~ i 200 ACV ACORUS CALAMUS 'VARIEGATUS' VARIE( \ ~ \ ~ ~ j I - 5 COC CEPHALANTHUS OCCIDENTALIS BUTTC VARIEGATED SWEET FLAG 1 GAL. CONT. 18" O.C. d9IE~. BUTTONBUSH 5 GAL. CONT. AS SHOWN SKIMMER IS TO BE A SURFACE
~ ~ \ ~ ~ \ ! ~ \ l _ 92 lVE ILEXVERTICILLATA WINTE WINTERBERRY HOLLY 5 GAL. CONT, 3' O.C. skIMMER oR APPROVSE~ DEVICE MP
~ ~ ~ ~ ~ ~ ~ \ ~ ~ ' . ~ III 250 TVA IRIS VIRGINICA SOUTF SOUTHERN BLUE FLAG BARE ROOT 18" O.C.
~ ~ ~ \ ~ \ ~ _ ~ , l ~ ; ` 20 PVS PANICUM VIRGATUM SHENANDOAH SHENA H' SHENANDOAH SWITCH GRASS 3 GAL, CONT, 3' O.C.
~ \ _ SLO E ~ _ ` ~ ~ - - 27 PPM PENNISETUM GLAUCUM'PURPLE MAJESTY' PURPLI tJESTY' PURPLE MAJESTY MILLET 5 GAL, CONT. 3' O.C, SWEET BLACK-EYED SUSAN 4" POTS 18" O.C.
\ \ ~ ~ \ \ 3.60% AVG., ~.56~ MAX. ~ ~~EA~Y 250 RSU RUDBECKIASUBTOMENTOSA SWEET PR A ER 1 ~ ~ \ \ LEVEL, S E D # \ \ \ ~ ~ ~ - ~ ; ~ \ \ ,
15 LEVEE SPREADER \ ~ \ \ ! ' PLANTING NOTES:
\ ~ ~ \ / ao 1. TOPSOIL STRIPPED FROM SITE MAY BE USED FOR BI t \ \ ~ \ \ • \ \ \ ~ \ ~ \ - - ~ HOWEVER LOCAL SOILS AND ON SITE SOILS MAY N Y BE USED FOR BEDDING MATERIAL, iITE SOILS MAY NOT BE SUITABLE FOR
' ~ \ \ ` \ ~ ~ ~ ~ r. T ~ WETLAND PLANTS. PRIOR TO INSTALLATION OF BI _ - ~ TALLATION OF BEDDING SOIL, FLOar
- ~ ~ i . \ 3 T LANDSCAPE CONTRACTOR SHALL SEND SOIL SAMP SEND SOIL SAMPLES FROM SELECTED FLEXIBLE ~oINT
_ ~ \ \ SOURCE TO EITHER NCRS OR THE NC STATE AGRICI ~ ~ \ DRA7f~A6E__EASEMENT ; ~`C ' ~ ~ ~ \ FOR SOIL ANALYSIS, NC STATE AGRICULTURAL EXTENSION (RADIATOR HosE)
.STRUCTURE DRAW DOWN DEVICES.
\ ~ \ \ , ~ \ FOREB AY ~ \ QTR 2. DO NOT PLANT AT OR NEAR RISER STRUCTURE DR/ \ \ ~ ~ ~qM 8 3. ALL PLANTS TO BE IRRIGATED. OUTLET END: CONNECTION TO OUTLET PIPE OR RISER BARREL PIPE LONGER THAN SHOWN.
^ \ \ \ ~ ~ \ \ ~ \ ~ ` ~ ~ . \ ~ HW 420 ~ (/PEER NOT INCLUDED WITH SKIMMER SUPPLIED BY USER.
\ \ \ \ . ~ \ 'L \ \ ~ \ \ \ ~ \ ~ ~ ~ \ ~ ~ OFF \ \ \ - B \
\ \ \ \ \ ~ ~ , ~ / \ , ~ DER
\ ~ \ \ ` / \ ~ \ \ \ , \ \ \ \ \ ~ , ~ \ \ ` \ T \ ~ e~
~ v A ~ ~ A V A A _ - ~ ~ ~ T , ~ v
DETAIL No. STANDARD SKIMMER DETAIL 04000.18
\ \ \ ~ - - \ - ' - - _ \ ~ \ \ \ DRAINAGE EASEMENT EFFECTIVE: 07/01/04 s+~T t of t
j ~ \ \ ~ _ / / v ~ v ~ \ r \ ~ \
/ ' \ 1 J ~ - _ _ ~ JB 421 \ \ F / / 1 ` \ ~ 1 _ - _ \ \ \ ~ \ y NOTE: FOREBAY TO BE INSTALLED AFTER COMPLETION 0 RISER BASIN
\ ~ \ GRADING & RETAINING WALLS AND AFTER CONVERSION OF P \ 0.00`e SLO E ON ~ ~ I, ~ : ~ ~ ~ _ \ \ \ \ V \ \ BMP FROM EROSION CONTROL DEVICE TO WET POND. GUTTER FLAT SLI 0.00 SLOPE ON TOP OF
~ - \ \ / ~ \ \ GUTTER (FLAT SLOPE) RCP RISER
~ / I ~ ~ ~ ~ ~ ' \ ~ \ SEE PLAN F01 ~ ~ \ ~ \ SPREADER LEI J ~ ! ~ ( ~ / ~ A V A 3' SEE PLAN FOR LEVEL sPREADER LENGTH 1' MIN. FREEBOARD TOP OF DAM
l I ~ ~ ~ ~ i ~ ~ A ~ A V LEVEL SPR LEVEL SPREADER uP ELEVanoN= WATER LEVEL DURING STORM 4"-6" HIGHER EXISTING SLOPE ON TRASH HOO
' i r ~ / ~ ~ 5 - f"'~.,. ~ ~ ~ _ ~ \ ~ \ \ \ PIP 24" CURB & GUTTER (3,000 DOWNSTRE DOWNSTREAM SIDE _
+ / \ ~ \ E FROM RISER DRAWpOWN PSI MIN COMPRESSNE j + ~ coc ~ - _ \ \ JB 422 ~ \ \ ~ T T I °HROUCH BUFFER .I _I I I=I I _ I I-I L-I 11.-1 I I
I / I I I \ ~ ~ , ~ ? \ \ \ \ \ ' \ S RENG H) I ~ { \ \ I I ~ 4 i / ~ \ \ \
I I 25 \ ' ACV ~ J . \ . ~ " ~ ~ \ \ \ \ '-III-III PEAK .FLOW ATTENUATION POOL 1= =II 3'-0" ' -III-111=
I RSU • ! I I I \ Rsu ~ i Iv ~ \ \ \ \ \ \
~ ~ 4 \ \ \ ~ \ ~ \ INSTALL CLASS B RIP RAP, COMPACTED / \ \ \ \ \ \ 18" MIN DEPTH, 3' WIDE SUBGRADE -III =I I ~-I ~ I- I MINIMUM SLQPE 3:1 COMPACTED 45 THICKH(MIN~ONE - " ~ -III-III _ - f i I-
I / - 25 25 \ ~ ~ \ WITH GEOTEXTILE LINER 5 ~ ~ ~ r ~ ` \ SUBGRADE PERMANENT GEOTEXTILE ' I I-I ~ I _I I I-I -I I I I UNDERUNER '-III-I I I~ ~ II I I ~ = _ I - 11-1 I - TI i
~ I \ IVA ~ / RSU R5 - ~ \ \ ~ ~ `
L, III--~ II__ EARTH DAM
~ " ; ~ ~ ~ , \ \ \ NOTE: FOREBAY NOT REQUIRED DUE TO LOW ~ FO E,BAY~ f - \ 50 / \ \ \ \ \ \ FLOW FRDM DRAWDOWN ORIFICE -III-~ .
/ % ~ ~ IVA ~ \ V A =1 =1 I I.I I I-III-III- I-= _ .I
~ ~ \ . ~ % ; \ \ \ ~ TYPICAL FOREBAY LEVEL SPREADER DETAIL ~ \ r \ \ \ )ER DETAIL - -III-111-I I i- I"-I I RIP RAP III-III== _
r ~ - ~ \ ~ \ ~ \ \ NTs \ \ \ ~ ~ \ \ \ NTS ANTI-FLOATATION DEVICE '-1 I I-I I1-1 ~ I-I ~ DISSIPATQR -Iil,,,lll,~ II-_~_ -
{ _ ~ \ l ~ ~ _111_111_ _ ANTI-SEEP COLLAR I-i 11=1 ~ I-I -
\ \ Sff ~ r- \ \ \ \ ~ .III =111.,,111,;,111„
~ _ \ - IVE ~ ~ \ \ \ \ \ I \ \ \ OUTLET PIPE
I I \ _ ~ 11 5 I Acv 9 _ _ _ _ ~ ~ \ \ \ \ I IvA Rsu RS 423 z0 ~ ~ ~ \ \ \ \ \ CROSS SECTION
PVS 'PPM ~ \ \ \ Nrs
~ \ \ \ I ~ I I ( 4~ _ RSU \ \ \ \ \ \ "~I
WET POND
- ~ ~ ~ \ \ \ _ - - - - ~ _ \ \ \ ; ; \ \ \ \ \ GRAPHIC 5CALE
/ ~ ~ ~ \ ~ \ 0 0 15 30 60
~ \ ~ ~ DIMENSIONS ELEV.
TOP OF DAM WIDTH RETAINING WALL 348,00
_ _ - - - ~ ` \ \ \ 1 inch = 30 ft.
ANTI-SEEP. COLLAR 48" x 48" N A
.TOP OF SPILLWAY N/A N/A
~4 REBAR 12" SLAB i0P O.C. EACH WAY 1/2" PREFORMED JOINT (OPEN ALL 4 SIDES) sLAB TOP TOP OF ANTI--FLOATATION ' 7' x 7' x 3' 331.50 (OPEN ALL 4 SIDES)
FILLER, 12 WIDE TOP OF RISER 5' x 5' BOX 347.25
8" MIN. B.. ATTENUATION ORIFICE 2.5' X 6" 341.75 8" MIN,
TOP OF RISER=34725 TOP OF RISER=347,25 DRAW DOWN DEVICE a" DIP W/ 3° ORIFICE 339,00
OUTLET PIPE INVERT UP 36" RCP 332.00
PRECAST REINFORCED BOX
6" THICK SIDEWALL (MIN) e~EnC•IaICITc sDIEw~RiE~MIBNjX OUTLET PIPE INVERT DOWN 36" RCP 326.50
TRASH RACK SLAB TOP
8" ' x " RIFT =341 75 2.5' x 6" ORIFICE=341.75 2 5 6 0 CE
1/4"x 2" STEEL STRAP W/ i/4"x 2""STEEL STRAP W/
2 - 3/4" ANCHOR BOLTS ELEVATION SECTION 2 STRAPS REO'D 2 - 3/4 ANCHOR BOLTS 2 STRAPS REO'D
'0-RING' JOINT '0-RING' JOINT
2000 PSF MIN, BEARING CAPACITY SEE 8MP SECTION FOR SIZING DATA '
BENEATH COLLAR e
TI- P AR TYPICAL AN SEE COLL 90' EL90W
4"x4" TEE " p _ I I DRAW DOWN DEVICE ~ 4"x4" TEE
NTS WET POND POOL=339.00. 4 DIP WET PONO OOL-339.00 ' (4" DIP W/ MECHANICAL
\ ~ ~ ~ ~ NOTE: JOINT FITTINGS) I I
\ ~ ~ ~ \ r~~ ~ ~ /NOTE. ~ ~ ~ ~ \ ATa3E0.C M SUPPORTS
,PLACE STEM SUPPORTS 4" DIP NOT CONNECTED TO VALVE / ° B C ~ ~ ~ ~ AT 3 O.C.% 3.0" ORIFICE (DRAW DOWN DEVICE SHALL BE CAPPED
o \ ~ ~ ~ ~ ~ ~ ~ (SEE DRAW DOWN SECTION C-C) ~ ~ ~ ~ ~ / / / TO LEVEL SPREADER ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ i o ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ .UNTIL AFTER BMP IS CONVERTED FROM
~ ~ ~ ~ BOTTOM DRAlN ~ ~ ~ \ ~ \ \ ~ ~ \ \ \ \ a / / / / / / / / / / / / / EROSION CONTROL DEVICE TO WET POND)
I - \ \ \ \ \ \ ~ ~ ~ \ \ \ \ '0 RING '0-RING' GASKETED 4" DIP '0_RING' GASKETED
DRAW DOWN DEVICE ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ \ ~ \ \ \ \ \ \ \ \ \ \ \ 90' ELBOW CLAS CLASS III RCP ep0ooaoaoooe 36" DIAMETER ~j\~j CLASS III RCP °p°° ~A °000°
I I I I I 2.5' x 6" ORIFICE / / / / / ~ / / / (SET IN GROUT) ~ ~ ~ 36" B, (ABOVE DRAW DOWN) ~ ~ ~ ~ ~ \ ~ ~ \ (BEYOND) 36" DIAMETER °o°O~~~ooooeoR~(~,~°•000
~ "i' M /i a r PPRr ~ ~ ~ ~ ~ ~ ~ ~ ~ / H I S EM SU 0 ~ ~ ~ ~ ~ ~ ~ ~ ~ / GROUT EAC SDE (BEYOND) ee°°°~ °°Q°Q`~FE$$IQ~~~ o~ys°"ee.
~ ~ PRE °Ii1N ~RY
\4" NRS GATE VALVE \ ~ ~ 4, NRS GATE VALVE ~ / / / r I I ~ ~ (SET IN GROUT) ~ ~ ,{SET IN GROUT} JOINT SEALED WITH A-LOK NEOPRENE ~ ~
~ I I \ \ \ \ '0-RING' GASKETED ~ ~ ~ \ ~ \ ~ I I GASKET (OR APPROVED EQUAL). TT R I \ \ \ \ \~~\~/j\<NOT APPR011~~°°°°°F~~°Qf~~RUCTION
I i P ~ ~ \ ~ ~ ~ ~ ~ I I BO OM D A N CLASS 1 RC ~ ~ ~ ~ ~ ~ ~ CASs IN MANHOLE WALL ATTA H TEMPORARY SKIMMER / o / / / / / / / / / I I C / v 4" NRS 36" DIAMETER ~ ~ ~ ~ ~ ~ ~ I INV.=332.00 90' ELBOW °°°y~~°0peoeeop0°~~~°°° (SET IN GROUT) r ,,3 °°Oe R ~ FR °o °
m \ \ \ \ m GATE VALVE ~ \ \ \ \ \ \ \ \ I I '0-RING' GASKETED CLASS III RCP ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ i I - 36" DIAMETER \~/\~f pp E~"1 kl D Oo00p0oooioepee° "
3 I INK-332.00 POND BOTTOM=332.00 I I I - \ \ \ \ \ \ \ \ \ \ I 45 ELBOW \ ! I , ~
\ ~ v - ~ ~ ~ ~ ~ ~ ~ ~ \ ~ ~ ~ ~ ~ PAVED INV
o r ~ ~ \ \ \ ~ r~~/ ~ PAVED INVERT GROUT 6" ~ \ ~ ~ ~ ~ ~ ~ r\~/~\ i\~/ \ /PAVED INVERT I I JUL 1 ~ LQ~~ 4" DIP 07-SP-114
/ / a : ti'~I:'• / / / / / / `•••"~I•~r-'• e . e ~ ~ . . ° ti.'I TO LEVEL SPREADER PAVED INVERT ~j ~j/~ pENR Waittt~'lk;wi'i pp d ' • I r TOP OF ANTI-FLOATATION . \\'u~'~`t"IANOSANOST('Rma'tATERB(tANCH Af f ROY LD
o o .I• ~ •d . 1 r . T P FAA-F ATATION ~ ~ ~ o ..~•.I. , . n MANHOLE I u..,. '.r ..c '.u 0 0 N LO ' I V'0 r , a INK=331.50 / ~ ~ . ' ~ ` 'd :c INV=331,50 •I• a . 'I'I • ° °'d. aV r. ee
• '•a ~ \ . ~e • . ~ ~ ' ~ TOWN OF GARY d ° e• 7.•~ V.. ..d V
Q . ° Approved by Dote
o RISER PLAN VIEW U - Plonning Dote
v NTS a RISER & DRAW DOWN SECTION A-A RISER & DRAW DOWN SECTION B- SECTION B-8 DRAW DOWN SECTION C-C Engineering Dote
a
NTS I a a i NTS NTS
0
N Date Designer Scale No. Revision
o 1 TOC 1st REVIEW COMMENTS 01/31/08 CJJ HCF 1" = 30' STORMWATER M) ER MANAGEMENT PLAN WITHERS R"ENEL Sheet No
0 2 TOC 2nd REVIEW COMMENTS 03/13/08 CJJ Drawn By Date 00 CN - BRADFORD
1 3 MYLAR SUBMITTAL 05/08/08 PMO CJJ LAW 11/08/07 to 4 DWO COMMENTS 06/19/08 PMO Checked By Job No. ENGINEERS I PLANNERS I SURVEYORS C6,.O
(BN R o61z84.o1 CARY WAKE COUNTY NORTH CAROLINA (BMP#1--) 111 MacKenan Drive Cary, North Carolina 27511 tel: [phone] fax: [phone] www.withersravenel.com
F-T Wac z Y

. _ DRAINAGE EWSEMENT ~ ~ ; -
_ - „
- - \ . . _ - _ - ,r NOTES:
~ - 1-
_ , ` I 'i/ ~ - a, , , I _ ~ ~ _ 1. SEE RISER BASIN DETAIL & SKIMMER
- , \ ~ _ - J - _ ~ - _ , , I - , r ,30' DETAIL ON SHEET C6.0.
_ ^ S I ~ , fq ` ~ ~
I _ I 9 _ J. ~ I, I, / \ OFF fR 2. SEE TYPICAL FOREBAY/LEVEL SPREADER
~ I f~ \ \ ~ 1 DETAIL & SPLITTER BOX (JB 431) 4.0' WiDE WEIR DETAILS ON SHEET C6.3,
BOTTOM DRAIN STEM SUPPORT
y , i

~ ~ - ~ HW 430 _ , ' ti i I ' ~ ~A ~ ' ~ ~ ' _ - \ ~ \ _ B B
- \ i ~ , / ~ _ - - - - - ~ \ LOPE \ ~ _ \ _ _ ~ S , , _ WET POND
\ ' --V - - \ \ \ ~ (2.60% AVG., 3.50% MAC - - 3.50 MAX.)
_ ~ Y ,C _ GATE VALVE DRAW DOWN DEVICE 1 ~ 4" NRS 0 CLASS UARCPED DIMENSIONS ELEV.
\ ~ I ~ ~ i ' ~ r ~ \ DRAINAGE BASEMENT w . ' BOX r / - , i v ~ ~ N,, v. - 42" DIAMETER
_ , _ ~ ~t ~ ? ~ _ ~ 1 ~ - ~ I TOP OF DAM WIDTH RETAINING WALL 351.00
~ ~ ~ ` . ~ . \ ~ ~ ,~l_ LEVEL SPREADER #2
J6 431 ~ ~I _ ~ ~ - - - ~ ~ ~ 1 \ r ER #2 ANTI-SEEP COLLAR 48" x 48" N/A
_ . EADER A A TOP. OF SPILLWAY N/A N/A
~ TOP OF ANTI-FLOATATION 7' x 7' x 3' 337.50
~ , ~ ~ _ , a.o' WIDE WEIR MANHOLE TOP OF RISER 5' x 5' BOX 350.00 (ABOVE BOTTOM DRAIN
- _ _ _ _ - _ _ & DRAW DowN) ATTENUATION WEIR 4, 0' WIDE WEIR 349.00
- - _ ~ . . . _ - -
- _ _ - i ~ ? ~ / ~ ~ ? ~ - - " - RISER PLAN VIEW ATTENUATION WEIR 4.0' WIDE WEIR 348.25
? , _ ~ . NTS DRAW DOWN DEVICE 4" DIP W/ 3.0" ORIFICE 345.00
J i _ .r. - ` - , T- _ ~ ~ OUTLET PIPE INVERT UP 42" RCP 338.00
_ F / _ i - - \ ~ 1 \ \ \ ' ~ I / OUTLET PIPE INVERT DOWN 42" RCP 330.45
~ ! \ . . TRASH RACK SLAB TOP
_ - i ? ~ ~ .

_
_ 1 , ~ ~ _ ' ,
• ? 1 _ _ ~ - - ~ i ~ I v - _ _ ~ A T P -SLAB TOP SLAB i0P
_ _ _ = - - - SL B 0 / ~ , _ I ~ \ - (OPEN ALL 4 - ~ (OPEN ALL 4 SIDES) (OPEN ALL 4 SIDES)
~ ~ ~ - ~ A. l~ 1
; 4.0' WIDE WE -4.0' WIDE WEIR (ONE SIDE ONLY) 8" MIN. 4.0' WIDE WEiR {ONE SIDE ONLY)
I 8" MIN. I~ _ \ , ~ 'r , 'y - ~ i0P OF RISER=350.00 - - TOP OF RISER=350.00
\
1 ~i\ 1 I. ~ ~ PRECAST REIP PRECAST REINFORCED BOX PRECAST REINFORCED BOX
- ~ _ ~ ~ 6" THICK SID! ' I WEIR=349.00 6" THICK SIDEWALL (MIN) WEIR=349.00 6" THICK SiDEWALL (MIN)
~ i.-?~ \ ~ . - _ , _ - - - - - - _ 1
~ r- , - ~ ~ WEIR=348.25 WEIR=348.25
1 _ I~ _
~ " - - - .,ry - _ _ - _ \ ~ 4.0' WIDE WEIR i/4'x 2'
r _ ~ ,1 ONE SIDE ONLY 2 STRAPS ~ _ ? ~ . 2 41 X3%4" ANCHOR BOLTS/ 4.0' WIDE WEIR i/4"x 2" STEEL STRAP W/ 2 STRAPS REO'D (ONE S10E ONLY) 2 - 3/4" ANCHOR BOLTS 2 STRAPS REOb
- ~ ~ '0-RING' JOINT
'0-RING' JOINT
/ ' - - - - / ~ ~ 9D' ELBOW
- ~ - ` - \ ~ I, DRAW DOWN DEVICE 4"x4" TEE
~ v ~C ~ \ ~ \ ~ (4" DIP W/ MECHANICAL / / ~ J ~ \ ~ ~ WET POND POOL=345.00 JOINT FITTINGS) ~ I
\ ~ f. ~ /
\ \ ~ / A A3E OSC M SUPPORTS
/ _ 3.0" ORIFICE
~ _ / ~ / / / ~ - / ~ ~ \ ~
\ \
~ ~ ~ 4" DIP NOT CONNECTED TO VALVE ~ ~ - ~ ~ ~ ~ ~ • ~ ~ (SEE BOTTOM DRAIN SECTION B-B) / / /
RSU IVA x ~ ~ ~ ~ 1
~ avs RS 432 Rsu ~ ~ / / / / i GROUT EACH SIDE ~ //~~j/~\//~\ GROUT EACH SIDE
- ACV
~ / ~4 NRS GATE VALVE
RSU ~ - - ~ \ \ I I ~_JOINT SEALED W1iH A-LOK NEOPRENE / ~/~%(SEi IN GROUT) ~ I I
_ ~ 25 ~ / ' ~ ' / / I I JOINT SEAI I - _ _ ~ I I GASKET (G I SU ~ ~ ~ ' ~ \ ~ I I CAST IN M GASKET (OR APPROVED EQUAL) i i GAISKETE(OR APP OVED EQUA~)PRENE
- -I ~ I I ~ ~ / ~ / / I //i I I CAST IN MANHOLE WALL BOTTOM DRAIN j\~ j\~ j\~ j\~ I i CASs IN MANHOLE WALL ATTACH TEMPORANVS338.00 / I I
~ ~ ~ ~ ~ ~ I I 'o-RII '0-RING' GASKETED CLASS III RCP ~ ~ ~ ~ ~ ~ j I '0-RING' GASKETED CLASS Ill RCP 42" DIAMETER I I 42" DIAMETER
50 ~ . I I I I /INV.=338.00 I I VA \ POND BOTTOM=338.00 I I / INV.=338.00 POND BOTTOM=338.00 I I I I INV.=338.00
~ I I r I I 25 \ ~ P . ~ / / / / / / ~ / / / / / / ~ AVED INVERT
i;, GROUT 6.. - 50 ~ R5U ~ \ \ \ \ \ \ ~ ^;'•'1','0 GROUT 6" AVED I VE T g„~j~„ OROUT 6"
1 ~ / / / / / ~ ~ 90 ELBOW ~ 'I' r' a. ,f'~~ P
~ ~ ~ (SE N G OU) I u.. ; '.u i0P I o ~ ~ ~ ~ n INV. / e i0P OF ANTI-FLOATATION ~ ~ ~ • u°~.., . 1 r I , ,r r •.a ' TOP OF ANTI-FLOATATION iNV.=337.50 ~~~/~~i ~ . '.Q • , ' y ,+.a• a INV.=337.50
l ~ R5U qtr RSU ' S 50 25 \ ~ CV 25 _ ~
I COC Iva ~ 50 U RSU ACV 25 50 ' ~ ~ w . ~ R5U r.. I a x IVA I _ _
• ~ RISER & DRAW DOWN SECTION A-A ~ a BOTTOM DRAIN SECTION 8-B
I ~ ~
~ ~ _ Nrs I ~ _ ~ ~ - ~ 1 S NTS
~ I - ~

i, ~ ~ _ ~ r~
i ~
~ '
\ ~ ~ ~ - - - 1
A A 4R R1" o ` \ , ~ \ EAAH AY REBAR 12"
F ~ I~ OC E C EACH WAY 1/2" PREFORMED JOINT
a \ ~ - a i FILLER, 12" WIDE
~ GRAPHIC SCALE
a 30 0 15 30 60 M ~1; ~'.n
PLANT LIST N °,°°°.°~°N °CARQ°0oe, 0~ °°°°°a, l ~ °so
UA. KEY BOTANICAL NAME COMMON NAME SIZE SPACING 1 inch = 30 ft. o Q oo'°?°oQ~0EES5lpy9l otiy°•,e
0 N e o ~ e
200 ACV ACORUS CALAMUS'VARIEGATUS' VARIEGATED SWEET FLAG 1 GAL. CONT. 18" O.C. m 5 COC CEPHALANTHUS OCCIDENTALIS BUTTONBUSH 5 GAL. CONT. AS SHOWN PRE ~I ~Y
v 90 IVE ILEX VERTICILLATA WINTERBERRY HOLLY 5 GAL. CONT. 3' O.C. ~e„, NOT APPR4V~~y~~°~N~~RUCTION
250 IVA IRIS VIRGINICA SOUTHERN BLUE FLAG BARE ROOT 18" O.C.
25 PVS PANICUM VIRGATUM'SHENANDOAH' SHENANDOAH SWITCH GRASS 3 GAL. CONT. 3' O.C.
30 PPM PENNISETUM GLAUCUM'PURPLE MAJESTY' PURPLE MAJESTY MILLET 5 GAL. CONT. 3' O.C. z ~ 250 RSU RUDBECKIA SUBTOMENTOSA SWEET BLACK-EYED SUSAN 4" POTS 18" O.C. ELEVATION ~o'°'Roe° ao°o 4TION SECTION
PLANTING NOTES: 2000 PSF MIN. ;F MIN. 07-SP-114
~ 1. TOPSOIL STRIPPED FROM SITE MAYBE USED FOR BEDDING MATERIAL, BEARING CAPACITY g HOWEVER LOCAL SOILS AND ON SITE SOILS MAY NOT BE SUITABLE FOR BENEATH COLLAR oLiaR SEE BMP SECTION FOR SIZING DATA D APPROVE[)
WETLAND PLANTS. PRIOR TO INSTALLATION OF BEDDING SOIL,
TYPIC i LANDSCAPE CONTRACTOR SHALL SEND SOIL SAMPLES FROM SELECTED TYPICAL ANTI-SEEP C R ~ TOWN OF CARP OLLA
o SOURCE TO EITHER NCRS OR THE NC STATE AGRICULTURAL EXTENSION JUL 1 ~ 200 NTS Approved by Dote
o FOR SOIL ANALYSIS. 2. DO NOT PLANT AT OR NEAR RISER STRUCTURE DRAW DOWN DEVICES. Di;NR-wA'rERQUAUTr Planning Dote
3. ALL PLANTS TO BE IRRIGATED. 0 WE1t~NDSAwasioRMWAi~Rgruwcw Engineering Dote
a Y
0 a i
0
00 N0. Revision Date B Designer Scale
HCF 1" = 30' 0 1 TOC 1st REVIEW COMMENTS 01/31/08 CJJ ER MANAGEMENT PLAN. WITHERS RAVENEL SheeNo.
2 TOC 2nd REVIEW COMMENTS 03/13/08 CJJ Drawn By Date
" T 8 PMO CJJ LAW 11 08 07 3 MYL4R SUBMIT AL 05/08/0 ENGINEERS I PLANNERS I SURVEYORS C6.1
0 4 DWO COMMENTS 06/19/08 PMO Checked By )ob No. R ost e4.o1 CARY WAKE COUNTY NORTH CAROLINA W& 2 2 (BMP#2) 111 MacKenan Drive Cary, North Carolina 27511 tel: [phone] fax: [phone] www.withersravenel.com
Y

RI R A SE B S N
i ~
i SCREEN ACCESSIBLE THROUGH DOOR VENT
I I ! i" / ~ NOTE:
I , I i i ' SKIMMER IS TO BE A SURFACE
i ; ~ ~ i ~J ~ RCP RISER DEWATERING DEVCE SUCH AS BMP SKIMMER OR APPROVED DEVICE.
i' i i ' j , 1 MIN. FREEBOARD
~ AT R V RIN T RM TOP W E LE EL DU G S O TOP OF DAM
I ~ I ~ ; TRASH H00
i -
- I I=1 I I=1 1I- ' - - _I - - _
i ~ II;,I~-- ~I II ' ~ ` ~ ` i i ~ I I-111- - PEAK FLOW ATTENUATION POOL 1- 'I I II Fl.OAT
' - - i ~ ~ -III=-= - - ~ ; .III- _ - , -III= - - _ -
_I I I, ~ ~I ~ - - I; - ~ FLEXIBLE JOINT T MINIMUM SLOPE 3:1 (RaDlaroR HosE)
v -III-1 I I- - ' I__ - I - - - I I 1 - I I -III -1 I I_I I_ = I I I
IIII -II OUTLET END: CONNECTION
-"I=11== I - I_I I I_ I I_ _ _ _ EARTH DAM TO OUTLET PIPE OR RISER BARREL PIPE LONGER THAN SHOWN.
A - - - 'I I-_ NOT INCLUDED WITH SKIMMER SUPPLIED BY USER.
RS 452 , I ~=1 ~ 1= I ~ I=~ _ - I I-1 I I - - - - - - - -11
~_I -I I I_I I I_I I I_I I _ -1 =I ~ I RIP RAP
~ ~ ~ APPR XIMAT Y 950 F - =III-III=III="'-II .III=III= - Je a5t 0 EL L ~ _ _ II ~ ~ ~ ~ FROM HW 450 TO STREAM ANTI-FLOATATION DEVICE _ DISSIPATOR
1' ~ ~ -i I I=1 I I- I I- ~ ~ HW 450 I ~ ~ _ -I I illl~,lll-11-= - ~ -I I _I I I-III- ~ ~
_III_ ! ~ ~ ; % ~ 1 ANTI-SEEP COLLAR -I! -I ~ I_TI=1 I I-I I
, ; . -
• ~ ~ ~ I ~ ~ ~ ~ ; ~ - III .I I L, ; ,I ~ I, ; ,I ~ I„ DETAIL No. STANDARD SKIMMER DETAIL 04000.18
! ~ I , ; ~ UTLET I I ~ ~ r EFFECTIVE: 07101/04 sf+EEr t of t
I I
I' ~ I ~ i ~ I I 1 I I
~ i ~ CROSS SECTION
I ~ ~ I I `I ~ y----._ NTS
II ; ~ ,I
I '
r ~ ~ 1 I j ~ ; I I ~ I ~ / ~ I
FOREBAY
GRAPHIC SCALE C"V 30 0 15 30 60
l~
i WET POND
~ 1 inch = 30 h. -
DIMENSIONS ELEV.
TOP OF DAM WIDTH ?AM WIDTH 10' 358.00
ANTI-SEEP COLLAR P COLLAR 48" x 48" N/A
TOP OF SPILLWAY SPILLWAY N/A N/A
TOP OF ANTI-FLOAT ANTI-FLOATATION 7' x 7' x 3' 347.00
TOP OF RISER ISER 4' x 4' BOX 355.25
~4 REBAR 12" ATTENUATION WEIR O.C. EACH WAY 1/2" PREFORMED JOINT PION WEIR 2' WIDE WEIR 355.10
FILLER, 12" WIDE DRAW DOWN DEVICE WN DEVICE 4" DIP W/ 2.0" ORIFICE 353.00
OUTLET PIPE INVERT IPE INVERT UP 24" RCP 347.50

s A roP OUTLET PIPE INVERT LB (OPEN ALL 4 SIDES) IPE INVERT DOWN 24" RCP 347.33
TRASH RACK ~CK SLAB TOP
8.. MIN.
' 70P OF RISER=355.25
g" ~ PRECAST REINFORCED BOX 6 THICK SIDEWALL (MIN)
WEIR=355.1.0
ELEVATION SECTION
2000 PSF MiN. BEAR~NC cAPACIrr SEE BMP SECTION FOR SIZING DATA
BENEATH COLLAR 2.0' WIDE WEIR (ONE SIDE ONLY) IL_-~ 1/4"x 2" STEEL STRAP W/ 2 - 3/4" ANCHOR BOLTS
TYPICAL ANTI-SEEP COLLAR 2 STRAPS REO'D
Nj$ '0-RING' JOINT '0-RING' JOINT
90' ELBOW
n-n
DRAW DOV (4" DIP W/ ME DRAW DOWN DEV7CE 4"x4" TEE (4" DIP W/ MECHANICAL
WET POND POOL=353.00 I I I JOINT JOINT FITTINGS) I I
NOTE:
PLACE STEM SUPPORTS
A i d~ O, C, 2 2.0" ORIFICE h~1
\ "N T 0 E "NOTE:
\ THE KOR-N-SEAL II CONNECTOR HAS BEEN 2, 0' WIDE WEiR \ THE KOR-N-SEAL II CONNECTOR HAS BEEN
\ APPROVED A$ AN ALTERNATIVE TO THE A-LOK A OVE BOTTOM DRAIN \ (B MANHOLE NEOPRENE GASKET FOR THIS PROJECT. THE APPROVED AS AN ALTERNATIVE TO THE A-LOK 4" DIP NEOPRENE GASKET FOR THIS PROJECT, THE
& DRAW DOWN) 4" DIP NOT CONNECTED TO VALVE / ~ CONTRACTOR SHALL ENSURE THAT AWATER-TIGHT 4 W (SEE DRAW DOWN SECTION B-B) CONNECTION/INTERFACE IS ACHIEVED. ANY OTHER CONTRACTOR SHALL ENSURE THAT AWATER-TIGHT CONNECTION/INTERFACE IS ACHIEVED, ANY OTHER
~ o ALTERNATIVE TO THE A-LOK NEOPRENE GASKET o - \ / ALTERNATIVE TO THE A-LOK NEOPRENE GASKET
SHALL BE APPROVED BY THE ENGINEER AND BY THE a \ \ \ TOWN OF CARY PRIOR TO INSTALlAT10N. SHALL BE APPROVED BY TWE ENGINEER AND BY THE TOWN OF CARY PRIOR TO INSTALLATION.
r DRAW DOWN DEVICE '0-RING GASKE7ED ^j' a CLASS III RCP / / / a \
\ \ \ i 24" DIAMETER ~ ~ ~ ~ - n-n Ott GROUT EACH SIDE (1~.J n: e~ rte:. a;j; CROUT EACH SIDE
_ titi: L'k J.':' p0oaoeaoaooo
C0 \4" NRS GATE VALVE .f.. " o / SET IN GROUT I I o / ) JOINT SEALED WITH A-LOK NEOPRENE 6 JOINT SEALED WITH A-LOK NEOPRENE °°°°°°°~1~N°0CAR0~ °e00e
BOTTOM DRAIN 4" NRS BOTTOM DRAIN v ~ I I °J CATE VALVE ATTACH TEMPORARY SKIMMER I I GASKET (OR APPROVED EOUAL)' I I GASKET (OR APPROVED EOUAL)' s° ~ e°°0 °°0 ~ eee
o - - INV=34750 / / / / / I I CAST IN MANHOLE WALL N h-~ I I A A \ \ \ \ \ \ I I CAST IN MANHOLE WALL ' e ~ ee @ESSlpN9 ~~y eep i I '0-RING' GASKETED CLASS 111 RCP ~ ~ ~ ' a~~ ~ ~ ~ ~
~ \ \ \ \ \ \ I I '0-RING' GASKE7ED CLASS NI RCP - - I I 24" DIAMETER
I I INV.=34750 ~ POND BOTTOM=34750 I I I 90' ELBOW i i 24" DIAMETER L.S ° I I 1NV.=347.50 0 $ 0 0 (SET 1N GROUT) I I ° 9
T PP RT / ~ \ / / \ \ \ I I I I NOT APPROV~f~a°F~~'~O~S~UCTION
$ \ \ \ \ \ \ \ ~ \ \ VED NVE GROUT 6" f / ~ \ PAVED INVERT GROUT 6" ~e°oeeG~~ o°H~oN~~°o°~~Q'e°°°
' \ \ \ \ o ' I' % • : • 70P OF AN71-FLOA iA TION I RISER PLAN ViEW ' . \ iy ~ a fNV=347.00 u . y ; .u TOP OF ANTI-FLOATATION I ° INV.=347.00 ~ •'a ~ ~ ~ .
N Nrs - \ . , ~ °.~a • ~'e 07-SP-114
\ U /
O m d APPROVED
% RI R RAW WN SECTION A-A a SE & D DO DRAW DOWN SECTION B-B JUl ~ ~ .TOWN OF CARY
3
o Nrs Q U NTS DENR-WATEROUAUi'f~ Approved by Date
N U O WETIANDSAND STORMWATER 6RAN9~Ionni ng Date Engineering Date
a Y
0 a i
a No. Revision Date B Designer Scale
1 TOC 1st REVIEW COMMENTS 01/31/08 CJJ HCF 1" = 30' STORMWATER Mj ER MANAGEMENT PLAN WITHERS R"ENEL SheeNo.
2 TOC 2nd REVIEW COMMENTS 03/13/08 CJJ Drawn By Date o BRADFORD
3 MYLAR SUBMITTAL 05/08/08 PMO CJJ LAW 11/08/07 ENGINEERS I PLANNERS I SURVEYORS C6.2
Checked By Job No. 4 DWO COMMENTS 06/19/08 PMO (BMP#3) 111 MacKenan Drive Cary, North Carolina 27511 tel: [phone] fax: [phone] www.withersravenel.com
W&R 2061284.01 CARY WAKE COUNTY NORTH CAROLINA (BPv 0 Y

. ` ' f ~ ~ ~ • NOTE:
' / i - -
• / SEE RISER BASIN DETAIL & SKIMMER NOTE: FOREBAY TO BE INSTALLED AFTER COMPLETION OF DETAIL ON SHEET C6.0.
~ GRADING & RETAINING WALLS AND AFTER CONVERSION OF 0.00 SLOPE ON TOP OF l,V BMP FROM EROSION CONTROL DEVICE TO WET POND. GUTTER (FLAT SLOPE)
rf . - i/`y ~ \
I i ' I , ~ ~ SEE PLAN FOR LEVEL SPREADER LENGTH
i t ~ ~ , ~ ~ . F . s 3 LEVEL SPREADER UP ELEVATION= 4"-6" HIGHER EXISTING SLOPE ON
it p. - _ 24" CURB & GUTTER (5,000 DOWNSTREAM SIDE 'O-RING' GASKETED PIPE FROM BYPASS STRUCTURE PSI MIN COMPRESSIVE DIFFUSED FLOW CLASS 10 RCP
i D ~ _ ~ _ r ~ ` _ STRENGTH) THROUGH BUFFER '0-RING' GASKETED 42° DIAMETER
P. - - - - - DRAINAGE EASEMENT CLASS III RCP TO STREAM ' 24" DIAMETER
I - P . ~ _ , ~ - w a FLOW FROM ENTRY FEATURE 0 3'-0"
y~ i, I ~ v ~ _ c _ - - INSTALL CLASS B RIP RAP X57 WASHED STONE - Y ~ FROM OUTLET TO BOTTOM COMPACTED 4" THICK (MIN)
_ - 7- „ \ • ~ i~ _ - - ~ - SUBGRADE PERMANENT GEOTEXTILE OF FOREBAY 16" MIN
~ J ~ ~ . , i ~ ~ _ DEPTH, 3' WIDE WITH UNDERLINER GEOTEXTILE UNER
- I ~ I _ - ~ _ _ , _ ~ . \
~ 1~ ~ y\,,\`\'• NOTE: FOREBAY NOT REQUIRED DUE TO LOW WEIR WALL SLOP ~ FLOW FROM DRAWDOWN ORIFICE
` .
I , I - ; ~ (2.60 AUG., 3.501 _ I lC S , ~~VG., 3.50~iMAX~) TYPICAL FOREBAY~LEVEL SPREADER DETAIL
r.. r I , - ~ _ ~ ~ I , ; ~ ~ _ a~FF ~ ~ NiS
~ , ~ y ~ ~ ~ ~ ~ , _ ~gq~ _ SEE _ . . _
. ~ _ \ r ~ ~ NOTE
~ \ HW 430 ` a \ ~ ~ - - ti ~ /
_ \ ~ '0-RING' GASKETED
~ _ . ~ - ~ \ > ~ - - ~ CLASS NI RCP 5" PIP i0 ' ~ l 54" (MIN.) 1.D. JUNCTION BOX 42" DIAMETER
` \ ~ ~ \ / FLOW FROM BMP ~'2 ~(SEfLNOTE)ADER Y L
_ ~ . 1 _ _ " RAINAGE EASEMENT _ • , p w
\ ` 1~ ~ y ~ ~ ! i~ t v ~ .SPUTTER BOX JB 431 PLAN VIEW
i ; t - ~ ~ _ _ ~ i _ I ~ ~ _ ~ ~ `~i v (FLOW BYPASS STRUCTURE)
. V „ ~ ~ JB 431 ~ ' ~ \ LEVEL SPREADER ~2 NTS
- - . r ~ ~ ~ ; ~ _ _ _ . _ _ ~ 1 \ - ` 15",, LEVEL SPREADER NorE:
~ \ \ - \
I ~ ~ ~ . \ ~ ~ ~ \ 6° DIP SHALL BE CAPPED UNTIL AFTER ENTRY ~ _ i '0-RING' GASKETED FEATURE &BMP ~+2 ARE CONVERTED FROM
_ I i - i - - - - ~ I ~ " _ - \ ~ CLASS 111 RCP EROSION CONTROL DE4iCES TO WET PONDS - ' % I \ 24" DIAMETER
I ~ - - _ _ RS 440 ` ~ _ r I - _ ~ I ~ FLOW FROM ENTRY FEATURE _
• ~ - ~ _ _ ~ ~ I ~ I I I I
I - _ _ _ - ~ ~ " I , . - - - _ - \ + J '0-RING' GASKETEDI
, ~ . _ _ _ I i - - - ~ ~ ~ ~ ~ , ~ ~ CLASS 111 RCP ~ i 6" DIP TO I I 42" DIAMETER I I LEVEL SPREADER I I
_ - ~ ~ ' ~ f y` I I (SEE NOTE) ~ I '0-RING' GASKETED CLASS Ili RCP. ~I I I - I I 42" DIAMETER
- _ r _ - - _ _ - , \ ~ ~ ! ~ ~ I I ~ WEIR WALL \ ` \ ~ _ _ FLOW FROM BMP J/2 i i r ~ (8" WIDTH)
_ . , ~ I _ _ , r _ ~ ~ ^ ~ I I I I I I 0 HW 430
- _ . , _ . _ I I I I I
_ _ - , - - _ _ ~ _ _ - - - ~ I i ~ I I INV.=330.25 ~ ~ 1 1 . 12" I ~I
- - , ; I , ; ~ _ ~ _ ~ _ _
i ~ - _ - _ _ _ _ _ ~ - ~ , ~ - _ ` I ; -
_ - - _ , , ~ , ' 7 . °
- , _ ~ ~ I ~ ~ ~ , ~ I _ - ~ ' _ , ~ ,I ~ ~ ~ i, - . ~ , - _ ` ~ r ~ ` =
_ , ; - ~ i , I - _ _ ~ _ _ -
i I ~ ~ - - ~ ~ i _ i ` ~ ~ - ~ x` SPUTTER BOX (JB 431) SECTION
y I ~ I IJ \ . \ ` 1 / - - 3~ 1 ~ _ _ ~ ~ ' ~ ~ ' ~ ~ (FLOW BYPASS STRUCTURE)
~ l I I - - ` ~ O ' ~ NTS
cw~PHicsc,aLE WET POND
30 0 15 30 60
1 inch = 30 ft. DIMENSIONS ELEV.
roP OF RETAINING wau=33s.DO TOP OF DAM WIDTH RETAINING WALL 336.00
ANTI-SEEP COLLAR 48" x 48" N A
TOP OF SPILLWAY N/A N/A
~4 REBAR 12" O.C. EACH WAY i/1" PREFORMED JOINT TOP OF ANTI-FLOATATION 7' x 7' x 3' 330,50
FILLER, 11" WIDE TOP OF RISER 5' x 5' BOX 334,67
SLAB i0P SLAB i0P (OPEN ALL 4 SIDES) (OPEN ALL 4 SIDES)
~'4 DRAW DOWN DEVICE a° o~P w/ z.o" oR~~~cE 333,00
OUTLET PIPE INVERT UP 24" RGP 331,00
8" MIN. 8" MIN. 70P OF RISER=334.67 OUTLET PIPE INVERT DOWN 24" RGP 330.60 ToP of RISER=33a.57 TRASH RACK SLAB TOP
'i;;~~
PRECAST REINFORCED BOX PRECAST REINFORCED BOX 6" THICK SIDEWALL {MIN) 6" THICK SIDEWALL (MiN)
8" RETAINI RETAINING WALL
ELEVATION SECTION
1/4"x 2" STEEL STRAP W/ 1/4"x 2" STEEL STRAP W/ RETAINING WALL
2000 PSF MIN. 2 - 3/4 ANCHOR BOLTS 2 - 3/4" ANCHOR BOLTS BEARING CAPACITY SEE BMP SECTION FOR SIZING DATA z STRAPS REO'o 1 STRAPS REQ'D
BENEATH COLIAR 'O-RING' JOiNT '0-RING' JOINT '0-RING' JOINT
TYPICAL ANTi-SEEP COLLAR 90' ELBOW
NTS 4"x4" TEE ~ DRAW GOWN DEVICE
WET POND POOL=333,00 (4" DIP W/ MECHANICAL
4" IP 4"x4" TEE WET POND POOL=333,00 I I I D I BOTTOM OF RETAINING WALL=333.00 I I ~ JOINT FITTINGS}
'NOTE: NorE: - _ THE KOR-N-SEAL II CONNECTOR HAS BEEN PLACE STEM SUPPORTS
APPROVED AS AN ALTERNATIVE TO THE A-LOK AT 3' O.C. NEOPRENE GASKET FOR THIS PROJECT, THE 2,0" QRI6ICE"
B C CONTRACTOR SHALL ENSURE THAT AWATER-TIGHT NOTE:
CONNECTION/INTERFACE IS ACHIEVED. ANY OTHER PLACE STEM SUPPORTS 4" DIP NOT w MANHOLE ALTERNATIVE TO THE A-LOK NEOPRENE GASKET A7 3' O.C. (SEE DRAW ,~-4" DIP NOT CONNECTED TO VALVE (SEE DRAW DOWN SECTION C-C)
o SHALL BE APPROVED BY THE ENGINEER AND BY THE
° TOWN OF GARY PRIOR TO INSTALLATION. 0 4" DIP
a A A '0-RING' GASKETED '0-RING' GASKETED
i .CEO 90' ELBOW CLASS III RCP CLASS III RCP 24" DIAMETER
a ~ PS~~ (SET IN GROUT) 24 B~ ONDTER M ~ G a0P ( ) (BEYOND) 000oooooaoooooooa
4" R ~ti~ 5 6~,R 4" NR5 GA1 4" NR5 GATE VALVE o°°°~~~N°°°~~°A~~~/°00°
° GATE VALVE OO~P501Pt1' GROUT EACH SIDE G a a (SET IN GRC m ~ (SET IN GROUT) °000°?°o°Q ~FESSIpNq,°$.9°°e,
°o I ~..i, " 4" NRS GATE VALVE I
of I I JOINT SEALED WITH A-LOK NEOPRENE I I (SET IN GROUT) PRE ~~~5~~~ ~Y ° e° e
w GASKET (OR APPROVED EQUAL)• I I \ BOTTC CAST IN MANHOLE WALL ~ ~ ATTAC ATOTACH TEMPORARY SKIMMER NOT APPROV~° C~,°^ef V~9~O~i~~UCTION
STEM SUPPORT I I INV.=; INV.=331,00 °o°~/ °ute~NCiNE~'°o°° Q°°° °o°aa°eee °o
o '0-RING' GASKETED CLASS iII RCP i I ~ 24" DIAMETER I I
~ I I i I iNV.=331.00 I I ~ I I PC \ II POND BOTTOM=331.00 (SET IN GROUT) °y°FR ooC oeoc°~°°`~°°
~ I i i i RETAINING WALL I I PAVED INVERT
o I I I I 6" GROUT:.';`r;~`, PAVED INVERT PAVED INVERi~ ~ M ..~I r~,..a ~ a~ ~ :8 ~ 4,~ ti I.: ~ ~ 07-SP-114
v RAW DOWN DEVICE I ~ . d . d ° I ° i r ° A ~ n ~ I . ~ BOTTOM DRAIN D ~ ° i r ~ ° ~ P ' d . v , ao . "e Q... ~ APPROVED
° TOP OF ANTi FLOATATION ~ ' . a . ° ; . ~ d ' i i0P OF ANTI FLOATATION d i 01 iNV.=330.50 ° , ~ INV.=330.50 a ;a ~ d "t ~ a.' ° e a a o a a d a" TOWN OF GARY
a a a. a° 4d ° .~UL • ~ 2008
B C 0 i
° RISER PLAN ViEW U DRAW DOWN SECTION C-C oEtirz-wTORr~wa~Ra~,NCw approved by Date_..~.._....
N T RISER & DRAW DOWN SECTION A-A RISER & DRAW DOWN SECTION B- o NS ,,~1'~NOSS~ Plonning Date B NTS Engineering Doter
a NTS NTS Y Nrs
0 a i
o _ - ~ -
N Date B Designer Scale 00 No. Revision
to 1 TOC 1st REVIEW COMMENTS 01/31/08 CJJ HCF 1" = 30' STORMWATER M, ER MANAGEMENT PLAN WITHERS i/ENEL Sheet N
0 2 TOC 2nd REVIEW COMMENTS 03/13/08 CJJ Drawn By Date
°m - BRADFORD ~ 3 MYLAR SUBMITTAL 05/08/08 PMO CJJ LAW 11/08/07 ENGINEERS I PLANNERS I SURVEYORS C6.3
0 4 DWO COMMENTS 06/19/08 PM0 Checked By job No. 4TRY FEATURE) 111 MacKenan Drive Cary, North Carolina 27511 teL [phone] fax; 919467.6008 www.withersravenel.com
4. CARP WAKE COUNTY NORTH CAROLINA o W&R 206 28 0, I (ENTRY Y