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Home My WebLink About20021204 Ver 1_MAPS_20020730 N ~ ~ 0 BIORETENTION SIZING COMPUTATIONS U • U * _ * = Z DRAINAGE AREA A C FACTOR 5% (WITH SAND BED) U P oc =SIZE OF BIORETENTION AREA Q Y a 1.16 AC*0.85*0.05=0.049 AC.=2,148 SF W ~ I• ~ ~ U o r-~--~ ~ ° o N BIORETENTION PLANTING COVER COMPUTATIONS a-?--+~ N W W o--~ ~ BIORETENTION AREA #4 = 2,148 SF = 0.049 AC. Q W W W PLANTING REQUIREMENT = 1,000 PLANTINGS AC. W Z W W W W W / TOTAL PLANTINGS REQUIRED = 49 PLANTINGS ~ / ~ W TOTAL PLANTINGS PROVIDED = 49 SHRUBS TREES a W W W W P'-,o ~ _ C W a'"'~ ¦ ~ U 7 i'1L W o•..o ~ ~ 5 W W O ~ ~ o 'i W U ~ ~ N V ® W 3" ~ ~ J W I.. W ~GI 6 PONDED OF 12 MONTHS AGED MULCH ~ c~ ~ L W 4' WIDE OPENING O Q ~ ° WATER DEPTH PROP. CURB W f Z W W 7 IN CURB (TYP.) _ I-1 - TOP EL.=770.10 _ - W W - - ' I-r I m . ~ lL _ I W W BOTTOM EL.=769.60 - I- , ; _ - - _ - : ~ Z - I - ' - 3:1 SLOPE W W V ~Y W W ,Irl - .--.:4 MIN..-.,_____-: ~ _ I :--PLANTING SOiI_ _~-:°'~I- W -11 -I; -III- Q W W W /y W I-II = - - -1~ ~ a j~ W W ; ;~,,,~;r; 6 1/4 PEA GRAVEL I~ _ - ~:4:.r,,1 MIN. SAND BED I U O W W BIORETENiION ~ (USE ASTM C 33 •.«~w~a.t,. I _ Z ~ SCALE: 1 -500 N L: o W W TOP=770.10 CONC. SAND) _ - - ' ~ ~ - 7 7 W a W BOTTOM=769.60 °o°o°o°o°o°o a 0 0 0 0 0 0 O cV L W W W W ~.i J M , J J L W W 18.0 6" PERFORATED 7 W #57 STONE PVC PIPE (SEE PLAN 29.0 AVG. VIEW FOR INVERTS) W W W W W W \ 1\ q 111 I I I I I i I I l l l I p u SEC110N G-G 5 W i W W ooe°oo°° N.T.S. ~ o W v0 ~Y ` 0 °oN W W ~ o In Q e°y J ~u!° = W W U off ao ~ zg sIJ N ~ ° W W p o° 6 PONDED Z~'o 0e (V W W W WATER DEPTH 3 OF 12 MONTHS AGED MULCH yYd00 000(~~~ W W X7 _ W W W Illllllllllll '''~~Inllll m\\\\`\\~ TOP EL.=770.10 W W W 1= I - - _~~I W W W W W W W W W W W BOTTOM EL.=769.60 ~ - _L _ _ ~ _ - ~ ~ ~ 3:1 SLOPE ~ I_L _ _ _ a y W W W W W W W ~II-I-~ = _ - _ = o W W W W W W W ~Y W W ~Y W W =I . _ _ III- 4 MIN.--..~__~~=_'._ ,I=! _ _=PLANTING - - ~~1.-~ SDrL_ . _ W W W W W W ~_III-.___.-_. lily I W W W W I-~11 = it W W W W W W III-i ~ . - .Iir „ III ~ 6 1/4 PEA GRAVEL YARD INLET THROAT =770.30 I ~ `"~~'1' MIN. SAND BEDS{`;7s<i°- - - - - - - , ~ MIN. 9° FOR EMERGENCY OVERFLOW 70.0' 6° PERFORATED PVC PIPE #57 STONE SECTION H-H N.T.S. Z 0 a BIORETENTION FILTER DRAINAGE SYSTEM CONFIGURAl10N SCALE: 1 "=10' 0 SCALE: AS SHOWN W 0 z Q BIORETENTION SIZING COMPUTATIONS BIORETENTION SIZING COMPUTAl10NS Q o 0 * _ * * _ * N n DRAINAGE AREA A C FACTOR 5% (WITH SAND BED} DRAINAGE AREA A C FACTOR 5% (WITH SAND BED) o = SIZE OF BIORETENTION AREA =SIZE OF BIORETEN110N AREA ~ w ~M U ~ NN 0.45 AC * 0.85 * 0.05 = 0.019 AC. = 833 SF 0.51 AC * 0.85 * 0.05 = 0.022 AC. = 944 SF ~ W ~ X ~ ~ ° x .`tl` ~~zw I'¢L ZSwo ~ ~ L ~ Z~ LL IYQIDM W 6 ¢ .~v~i ~ N~cCCo 7 O n U W ~~ir> Z J Z~Nn ZO•QZ I I OQp~ I 1 1 W V w~~~ (n U z _rNM V1 WOcDCD Z ~ Jt~ofa0 V 7 O Z ~~~M Q U o~r~~ BIORETENTION PLANTING COVER COMPUTATIONS BIORETENiION PLANTING COVER COMPUTAl10NS Q ~ ~ 3 N W o 0 7 7 5 ~W~~ ~ pow 7 BIORETENTION AREA #5 = 833 SF = 0.019 AC. BIORETENTiON AREA #6 = 944 SF = 0.022 AC. w PLANTING REQUIREMENT = 1,000 PLANTINGS/AC. PLANTING REQUIREMENT = 1,000 PLANTINGS/AC. W TOTAL PLANTINGS REQUIRED = 19 PLANTINGS TOTAL PLANTINGS REQUIRED = 22 PLANTINGS W TOTAL PLANTINGS PROVIDED = 19 SHRUBS /TREES TOTAL PLANTINGS PROVIDED = 22 SHRUBS /TREES W YARD INLET THROAT = 761.80 W W W TOP=16 10 F M;Y OVERFLON W W W BOTT 761.60 W W W W W 0 0 o ~ ~ M W W W W W W W W WM O W W W W W W 4' WIDE ENING N~ a t=om W W W W W W W IN CUR ( W W W W W W W W 3 0 BE CENTER D .Z ~ W W W W W W W 0 VEMENT ST:ZI E W n n ~ 0 pC~ 6" PONDED 3 OF 12 MONTHS AGED MULCH ~ 3 OF 12 MONTHS AGED MULCH _ ~ U ~ _ 6 PONDEO U Z- W~ W W W W W W W W W WATER DEPTH PROP. CURB WATER DEPTH /PROP. CURB ~ ~ a Z Q ~ Q K Q W W W W W W W W W W W W W W / (n J 4. cQc J ~ Lt.. i W W W W W W W W W - - - ~=~O~tD C -~00 TOP EL.-762.10 _ TOP EL.-761.60 U = m z = ° ~ a n 1 \ W W W W W W W 4' WID OPENING I~ ~I _II ~-JS= (=III li~li V ~o^r ~`'f °~ao~ BOTTOM EL.=761.60 Ilrill = - - BOTTOM EL.=761.10 -i _ _ a O~MM a NW~,~, f7 W W W IN CUB (TYP.) TOP= 61.60 W W W W W 2 BOTT -761.10 TO BE ENTERED _ _ ~ _ _ - _ ~ - _ _ - _ 3:1 SLOPE ! I_I I _ _ _ _ ~ I I_ 3:1 SLOPE k' Z o,.,, ~ Q li N N W W W W ON PA ENT STRI E - - - ~ off..... W u'o^^ =III = --_..4 MIN.--___-_ =11 -..'4 MIN.- - ~ -;_-=`I1=1. ~ ~ o~~~ oo~~ ,III _'~_pl AAITIAIC C(111 -..r': ~II~ _'-_DI AAITIAIf~ cnu - _•-=~:..il~ 7 Q ~~w ~ ~m~.N V ~ c _ W W W ~ W W W W inn nnv .,vim _ ..f L171`1 IIIYV JVIL W W W W v W W W W W W u I :11M17_.._- - - - Iii YARD INLET THROAT = 762.30 W W W W W W W W W W III-I . - _ II - n III- 6 1 4n PEA GRAVEL * < 6" 1/4" PEA GRAVEL FOR EMERGENCY OVERFLOW W W W W 6 W W W W W W ® ? [ A C W USE ASTM C-33 X11- - I ( -MIN. SAND BED, MIN. SAND USE ATM C 33 ( v..'1"i':~~.~. .'6: w. ..~t'~C'r .'y 'A. 1',ti, n,:.i ,~p',tplN •i.l.'. ~-..~•~V~r ,M~yi~~~: W W W I » r CONC. SAND) ) CONC. SAND W W W W' ® W W W W W 0 0000o0o0o0o0 000 0 o 0 o 0 0 0 0 0 0 0 tV 0 0000000000 O N W W W W M , „ i~ n W W W W W ~ .J 5.0 6 PERFORATED 6.0 6 PERFORATED z uj W W W W To P J W W W W W 57 STONE # PVC PIPE (SEE PLAN #57 STONE PVC PIPE (SEE PLAN W W W W W 10.0 AVG. VIEW FOR INVERTS) 15.0 AVG. VIEW FOR INVERTS W W W W ~ W W W W W W W W W W W W W W W W W W W W SECTION 1-1 SECTION K-K W W W W W W W W W W W W N.T.S. N.T.S. W W W W W W W W W W W W W W W W W W W H H 6 PONDED 6" PONDED ~ WATER DEPTH 3 OF 12 MONTHS AGED MULCH WATER DEPTH 3 OF 12 MONTHS AGED MULCH J TOP EL.=762.10 - TOP EL.=761.60 I I 1-1 i I-I _ I I I ~I ~ I-I ~ ! a I I BOTTOM EL.=761.60 _ . _ _ - _ _ - BOTTOM EL.=761.1I0 _ _ _ I I-I I I _ _ I I-1 I - SLOPE 3.1 SLOPE -=..:4' MIN. MIN.:- Z I_ PLANTING SOIL !I_Z 1=11 :l: PLANTING SOIL Ill= BIORETENTION #5 + #6 t = - _ = u •r - _ _ _ _ - _I!I _ 6 1/4n PEA GRAVEL 6- 1/4u PEA GRAVEL SCALE: 1"=10' MIN. SAND BED MIN. SAND BE - MIN . 9 " CD IN z 83.0' 6" PERFORATED 60.0' 6" PERFORATED PVC PIPE #57 STONE_/~__ PVC PIPE #57 STONE SECTION J-J SECTION L-L Z N.T.S. N.T.S. 0 W J BIORETEN110N FILTER DRAINAGE SYSTEM CONFIGURATION BIORETENTION FILTER DRAINAGE SYSTEM CONFIGURATION 19 SCALE: AS SHOWN SCALE: AS SHOWN W File No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001BMP2 XREF: DRAINAGE PLAN STATE/03001BASE SHEET: D10DF D20 ~ ~ H 0 U U 1 U Ma~h[AKE z z f VLLJ4C~E g U (~E711Tl7? °C a .Q ' Y Q W ? r ~ ~ ' d 0 o Iii i 2t Z o N N ~ ~ ~ o~ g z ~ ~ S ¦ ~ U b ~ ~ ~ M 1 O ~ o ~ M O ~ » I ~ ~ U 1 Lo 1 \ N I r- SCALE: 1 "=2000' m M ~ 1 ~ Q O 4 Z (L v 1 Q W ~ ~ 1 Q z l'~ {D 1 I Q 1 Y Q ~ N Q W p, I 1 O 1 ~ O 0 0 Z U N Zi o ~ 0 N O N d ti.J II e ~ =II lil J J Q V d V N I N C . 1 Illlllllllllllbf//1 d~~~ ////''hi ~0`~ °°°e°° ~ ~~i, i i O 4 . G ° ° i r - ° ~ oN ~s ° etJ N N o° _ D7. COVER SHEET s ° ~ ~ Y °o °o <u a 02. SOILS % F~.~ MAP p F ~ D3. OVERALL LAYOUT AND GRADING PLAN ,a~~ D4, S.W.I.M. BUFFER AND FLOODPLAIN DELINEATION ` ~ D5. BMP AREA MAP 1 EXTENDED DETENTION WETLANDS COMPUTATIONS o I ~ J J7. FORMS AN ~ O WO,R,KSHE~TS T ri~ ~ ti i ~ D8. BIORE ;T _ ~ TENTION AREA MAP, NOTES AND DETAI LS ~a" ~ 1 , D9. BIORETENTION COMPUTATIONS I I ~ ;,~a s , 5 D10. BIORETENTION COMPUTATIONS ^1. y , ' ~ ` ~ D.1. BIORETENTION COMPUTATIONS y c ~ i ~ e ~n / ;c ~ `rw i x.~, H~ t~, r~~ ~ ,I ~ h ' ~ , , ~ D12. SCS MET - HOD PREDEVELOPMENT SUBAREAS r h s ' r D13. SCS METHOD - PREDEVELOPMENT SWM COM x ~ I r POTATIONS 1 1 knr _ Tai •~f ~ ' D14. F~ Fr x' ° ~ , SCS METHOD - POSTDEVELOPME NT SUBAREAS . e 3x:~ , y 1 1 D15. } r EDW 2 -DETENTION COMP ~ UTATIONS AND STRUCTURE DETAILS _ ,r D18. EDW #3 DETENTION COMPUTATIONS AND STR UCTURE DETAILS 11 ~ z., . / , D17. LEVEL SPREADERS AND OUTFACE EROSION CONTROL MEASURES r~' P' f 1 1 T - c ~ ~ :~~:w~:~ ~ ~ ~ D18. EXTEND ° ED DETENTION WETLANDS #2 SECTIONS ~ . a- ~S r -4 r~ ~ ac lI i d 11 i , t ~ E TENDED DETENTION WETLAND 3 SECTIONS i 1 'l+ ' SIT W ~u. D20. E EVALUATION TOOL COMPUTATIONS o 1 1 1. 1 " i , I i a / ~ - II / ~ o ' z _ ~ J , r 1~ to ~ , / ~ a i ~ U 1 O Q i' THE TAUBMAN COMPANY ~ O ~ % o ~ 200 EAST LONG LAKE ROAD , O SUITE 300 U / Z rr W ~ M ~ BLOOMFIELD HILLS, MICHIGAN 48303 v cn N o ' / ATTN: MR. RODERYCK BLAKE; MR. MIKE MOUKALIAN W Y ' ~ % PHONE: 1-800-TAUBMAN -3 ~3 a Z Wo a x ~ ~ z w i3 o w O M i W ~ 4~3 tn~c`°c~ U w a~u ~ Z Z°ctO.,~ O CD Vf+ ~ Zaaz I I D~p01 I / W Q a~ao _ U N N I I V N 0 00 ~ ~ i N WOc^oc^D Z~~0~0 / O .~v~ Q IY M v. ~ Z ~i~r7r7 V OZr7M - - - NQ~~ 3 NWOO 7 M ~ O . / .-W~~ w _ v~ ~oM~ _ _ _ _ ~ - i / I a q ~ i a ' O ~ p O . I M ~ ww M I / 1 ; ~ r3 c? ~ o¢~ ~ J (y U 'I Z~ W`-' X /r rwr x Z Y~ x Q i ~ ~ = NJOO.- ~ O J~O r U m Z=~~ O tf) ~ ~ ~ ~ZOrn ~ W OQcon I I ! Q (yUWJ O~Mrri a L~ ~W~~ o co 7U"I) J N ~ ~ ~ ~ ~ O T 00 v-r~ ~ ._Q_._. T n id'd' V N a z I I I J I ui 0 w I C'3 a I J w z K EY MAP SCALE: 1"= 200' i LLI A ui > mi Z CITY OF CHAR] ?RLOTTE ~ W a oc hC ~ z ~ o ~ o v MECKLENBURG I ~ COUNTY Et L I INTlk O W IkJ 0 It rl? 1E1 18A I[] Z Y v Fie No. NC Tax Map No. Job No, 03- 001 Cadd Dwg. File: DRAINAGE/03001COV W XREF: DRAINAGE PLAN STATE/0300IBASE SHEET: Di OF D20 5 W 0 0 C n ~ a r • n 0 IX N ~ ~ o L,~' U U ~ r f ~ ~ U / ~ ~ = z ~ U ~ O a OC Y Q a ~ w Q b ~ Q ~ a ~ I`w~~ ~ l j ~ C . ~ 0 ~ ..n . © z ~ ~ r 'AwT' Fes" w l iu \ \ . ` to \ Q O ~ 1 ` ~ ` r( / ~ Z f U 1 ~ / 14 / ~ l r ~V . ~ 5 f ; ~ ~ .V./ r r~ i M ~,i^' ~ ,r 1 _ ~ / ~ ~ ~ ~ I U N ~ ~ ~ ~ ~ ~ N ^ ~ N n 1 ~ / l ~ s ~ \ ~ a Q / i ~ / ~ ~ , ~z,~ ~ ~ I n ~ ~ .'iY, Y%~~ 1. ~ 1 tt, R / r1-'~ ~ 1 'L ~ Z Y ~iM 1~ 1 Y,y„~l ~ 1 w fir:., 1'. „~~^w~,W ~ i 7 ° / ~ ~ ~ ~ 0 ~ ~ ~ rr 4'f / J / / r r-^2 f; L \ ~ ~ a p 1 1 , ~ ~ D ~ ~ tip' o ~ i ~ / i a ~ ~ ~ ~ ti r ~ N o:~ r ~ / / ~ ` r-- i C ~ , d Q ,c 4. 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I ( ,n ~ ~ 1 , ` ~ 4 a ~ A. • , A ~ ~ ~ ' r ~ 1 ~ ~ ~ ! r C • _ A ~ ~ V ~ ~ p / / ~ ) I/If /l C, \ ~ ~ , I ~ / / ~ ~ ~ ~ ~ \ ' a 11 i l ~ Q I /r r j ~ v ~ ! \ Y V A ~ _ ~1 ~ ~ V ~ ~ ~ ~ A 's \ t ~ ~ ~ ~Q,~".. ~ ~ , \ r ~ VAS ~ \ \ z 1 Q ~ ~ ~ ~ O ~ ,s ~ ~ ~ / / ~ ~ ~ 1 ~ A 1 ~ ~ > ( J ~ ~ A. ; i y ~ - ~ ~ A. ~ , ~ ~ n , ~ rr \ ~ / / / / cn ~Q 1 1•` \ \..1 \i \ I ~ I l I w ~ ~ I \ ~ Jl / ~ 1 / l ~ ~ ~ ,i l ~ ~ ~ / ~ r I ~I~ ~ l ~ ~ ~ / I ~ \ t r ~ ~ 1 ~ 3~' ,~:5' +"R. }ray ~ 1 ci r ~ l ~ 1 ~ ~ ~ ~ ~ l ~ ~ ~ ~ . ~ tip. @ ~ ~ ~ z I ~ ~ ~ ~ ~ ~ A ~ \ ~ ~ . ; ~ ~r ~ ~ - y l ~ a.; ~ ~ ~ ~ / i ~ ~ 71 ~ ~ ,a iE ~ j ~ / , a ~ 1 ~ d~ '1~ ~ ~ eta ~ ~ o s~' f ~ '~aS \ y9 ~ ~ ~ Q C~ ~ ~ 1 r ~ 3 y ~J r 1 ~ i ~ / f i r r'~ _ r~[ ~ r , . ~ ~ 1 ,4 1° s ~ r C ~ ~ M v ~ Q ~ 1 ti V ~ ,i4P '~,4 ~ \ ~ o ~ Q ~ N ~ i ul l~ 1~rX. ~ ~ 1 r.. ~a1S,R g ~ ii ~ r ' y. Y i w ~ 5 ~n+~,r 9~ y ~ N o o ~ U ~ ~ ~ 1 7a.y~ i~, a »h k'- ,~e,o a7 r: ~ ~ . ~ ~ Z vWi > o U ~ N N .u+~ -j 0 Q / ~ W~ X Y X X f 1 5~ b1 tSn 4~ ,I. t T` th' e a - I ~l I t ~ 3 ~ ~ / 7 ~3 Q Z Z wo ~ ~ O C> ~ z w Z3 0 "V ~ Q 1 ~ ~ 1 r a ,.Y ~ r ~ W ~ l~zoo~ ~~ccM a .~n~ ~ v / / W w~~ Z zO~D~n D lO ~ ~3: i I Z Z CD tt7 O J p N 1~ / a Q Z l I ~ p V 11 V 1- 1 1 r/ ! 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I I ~ I w ~ ~N"Y~ T ~t'~~~ )p 00 'I \ \ / / • I Q N7 laity r C;~lN mi rr -~J- :V N J I l ~ J ,RAM t . _l 1 r J - RUNOFF CURVE NUMBERS 0 r, Ftli THE ENTIRE SITE ui C t ~r PRE-DEVELOPMENT: TOTAL CN=58 7t ~111 I CN 5 WOODS, GOOD CONDITION, HYDROLOGIC SOIL GROUP: B W C CN=D O WOODS, GOOD CONDITION, HYDROLOGIC SOIL GROUP: C L P/ ST-DEVELOPMENT, TOTAL CN=98 C 1 00 l r I , p J ' - Uri RCN 98 IMPERVIOUS AREAS HYDROLOGIC SOIL GROUP: B . ' y-? ~ ~ CN 98 IMPERVIOUS AREAS, HYDROLOGIC SOIL GROUP: C 1 i SOIL LEGEND V. `v I c CHARLOTTE/MECKLENBUftt COUNTY SOIL TYPES CORRESPONDING SCS SOIL TYPES co 0 0 a J CeB2 ' p S LOAM B A D APPLING RAVELY ANDY Q n Ce62 CECIL (riNE SANDY LOAM) B ~ r ~J CeD2 CECiL (FINE SANDY LOAM) B ---7- - - i EnB EN SANDY ( LOAM) C 400- Z 1~- - ~ He6 HIELENA SANDY LOAM ( ) C UJI J amle ames MONACAN (FINE SANDY LOAM) C J I PaE PACOLET (SANDY LOAM B 1 / - i PaE VaB VANCE (SANDY LOAM) C W t File No. NC Tax Map Nor Job No. 03-001 Cadd Dwg. 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I 1 V AA r 1 1 I 1 ~ ! I 1~ ~ I I 1 l AI V A V V A v A\ \ ' J I I 11 r (I i 11 i l1 ~ vWi o I ' l r ! I U ~ N / / i I I i I 1 !i i ' i 1 I II ~~r 1 ' i ~ ~ ~ ^ i i yr,, } I I 1 1 \ \ \v _ \ \ I i I I I r r: 1 ~ 1 1 1 1 ~'\II 1 1 \ \ / I I t \ I 1 / I I I I ~`t 1 l` tr' t I I I' I t 11 T 1 \ r I \ l 1 ~ 11 1 1 I X Q \ 1 r~ I j I; l I ~ I 1 1 1 1 t \ 1 \t r' I 11 ` 1\ l Ittr f\ I i y 1 ` ~ ; 1 1 ~ ;`,f,7,.v I , I , 7 , , \ I 7 I t 1 tl I l I I / I 1 / J W~ Z O 00 ~ ~ a tD M LL M \ i i ~Ili~~ a1 ! ~ I \ 1 \I i \ \ 1 1 / I ~ / ; ; ` i ~ til~~1 \ \ I I I I I I I I I 1 1 1 \ I ' ~ ~ l - I I ' !1 r-1 1 1 1 : 1\ I' ~ I I I f , r! ~ Q Q .~Ln ~ NQ'GO fO LEND , I 1 ~ Wes.- z o~~ CD C1') n 1 1 I I I l' ' i ! 11 ' 1 I ' ~ \ - ~ \ / ! ~ \ ! ~~i( I \ a , I ~ r , (j1 Q ~¢ooolo U ~UNN PROPOSED DESCRIPTION EXISTING `J W ~ ~ ~ z - ; M 1 N M I 1 i I 1 I ~ I/ i ' r\ , r ' i \ I 1 ~ r.' /f ' ~ 1 5 \ t \ \ `l1,1\~I~ 1i 1 1 I i I 11 ' I I ~ I i ! 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I I I I 1 / I ! t ~ 1 1 1 ^I ~ 1 ( \i /J \ I l ,1 r-\ ~ ~ I \ 1\ l \l Il' 1 / ~ I ~ r V '1 r r1 ' I / 1 ! v'+ 1 GM GAS METER GM 1 I ! / \I r \ I y1'l1 I j ' ~ 1 1"' l \ 1 1 ( I 1 `t\ \ ~ , ~ 1 II \ I , I 1 1 \ \ 1 \ \ \ r 1 I 1 ~ " I I \ 1 y '~1.µ r r ~ I 1, f i / ~ M1,. ~ ( r I r T TRAFFIC CONTROL ! 1 ' 1 r i 1 \ \ i , r ' 'i~ ~ t \1 1 ~ ~ ~ `i` _ ' `~I -n°-~` ! i \ ` I 1 1 I \ I I I \I \ i I, 1 f, 1 1 1\ i I ! 1 i r y \ ~ ti 1 i 1\ 11 1 v , , I ~ v l ; ; / / BOX o 0 ~ ~ 1 1 I I I I 1' ~ / 1 AV I 1 I I I / _ A 1 1 1 I \ \ I I / I I 1 I I r 5 I 1 I 1,1 r ; I 1 r I r'l I r 1, LIGHT POLE LP 1 I I _ I ~ \ 1 r / / I ~ I ~ i ~ ~ ~ , ~ ! , / ~ , Lp~S LIGHT POLE LP S Q \ I t I i 1 r I I I \ r, rl \ 1 ~ \ \ 1 I /r l l r 1 l (n ~ (n ~ I 1 1 \ I , , r; i, i , ; SIGNALS .z c ' t / 1 , 1 1 I , i 1 , / •Q G Oz \ ` 1 I I / ~ / r - t I , \ 1 . ~ I I ' ~ I t 1 , i/ I J / ~ C.9 Qa I , 1 1 I I . ~ ~ ~ ; ; ~ ~ CURB & GUTTER = ~ U ~ _ X I 1 TRANSITION FROM CG-6 ~ ~ ~ Q ~ ~ Q l.~ \ \ \ 1111\ I 1 I ~ I / \ \ 1 I I ~ li I , ' 1 % , ~ I ~ r` ; / ; TO CG-6R ~J = o°o'' ~ ~ ~ °o 0 ~ , 1 , , , CG-6R CG 6 ~ _ U =s~ m o=~~ O Ca to \ i 1 1 , ll / , , , CG-6 CG 6R GC ~ ~z I I ~ Jo~~ t 1 1 \ \ ! 1 ! / I I / < , ~zw „ ; ~ SANITARY SEWER S ~ ~1U.I O O M M La ¢ ~ w n .,w:*,+~ 1 ` I \ 1 1 \t\ ° _r Z ~ I~ ~ r U N L~ N N N ;,,~I . ~ , r ' I I X;. .T• _ _ ~ SL CdAIITdAY I d1LDAl cl Z ~ = oZ-- ~ r.! W ~ _ I I 1 1 I 1 i I \ I~! ! , V / I I \ _ , i , vn a nn i ~n i u\na_ p z pppp' W O pp OO66e F I 1 C*4 04 • C.O. CLEAN OUT o C.O. N oo,. r i r1 I A v / N STORM SEWER r 1-- WATER MAIN W \ I I FIRE HYDRANT \ I ' I 1 1 N PLUG c OVERHEAD WIRES J UTILITY POLE r UNDERGROUND a; r r I UE UE ELECTRIC - ; ; - T TELEPHONE T G GAS MAIN E ELECTRICAL E I/ ; TRANSFORMER LT; I \ IV IV, t \ \y` ~ VV j 1 \\I r i 1 HANDICAP RAMP (CG-12) _ r 1 I I i/ • • • GUARDRAIL FENCE x x x ~ f i _I i y 1 I ` V 11 I 1 ~ ; ~ ? TRAFFIC FLOW ~ Lu 4c LIGHT ~ Z 'IQ v TREES LLW ~J 1 I l 1 /J / s LIMITS OF CLEARING / - ° / AND GRADING IC> --260--- 260 i ; ; CONTOURS 264 r/r 264 - I' 1 I I \V / i / /V i' If +264 SP 50 OT ELEVATION +264- r I ,i ~ 1 1 1 vI l/ ri pp /J//,// ; I TC TOP OF CURB T J BC BOTTOM OF CURB BC J - _ _ _ TOP OF WALL TW ; BW BOTTOM OF WALL BW HP HIGH POINT H.P. W LIMITS OF CLEARING Re a"mes i ries File No. NC Tax Map No. Job No. 03-001 Cadd Dwg , File; DRA INAGE/03001LYGR XREF: DRAINAGE PLAN STATE 03001Base SHEET: D3 OF D20 i i ~ o U ~ S Y W Q Q ~ U o D z c N N g z 5 ¦ N s °C ~ ~ M o ~ ~ o U N iA i~ ? 100 S.W.I.M. ~ c Q a p BUFFER LL 4 45' MANAGED-USE BUFFER WETLANDS (TO REMAIN) Q WETLANDS N CTO REMAIN) x Q 0. ~ 25' UPLAND ~ 30 212 SF ADDITIONAL o ~ ^ ~ 30 STREAMSIDE ~ BUFFER r• UP ND ZONE ~ ~ o rr ~ BUFFER Z U N ti o r~ to _ ~ ~ ~ FLUM FLOODWAY ~ w / ~ + ~ ENCROACHMENT LINE (.1) Q U ~ ` ~ ~ ~ V~ i-`ter / / / ~ ' 0o s.w.I.M. I , 1a??mumunnrrrry ~ ~ ~ i r \ V~` ~1_ °0000 00 '~O BUFFER + _ ~ v °o 7 ` -'C v L T T \ ~ SO• Moe , ~ ~e r + + + x ~ ~ WETLANDS o ~ WETLANDS , , „ + . ~ ~ ~ s , +,r \ s F + + + + ~ ' ~e W° - + \ ` ~ \ ~ a (TO REMAIN) ~ / / ORES ~ ~ ~ V - e?J cv.. , + fir/ + \ \ ':;A", ~ ~ Oe O 0~` / ~ ~ \ \ \ i ~ ° 0° ~ ~~r~ i i, r ~ \ \ 4i v o° ``C ~ \ ~j + + X ' r!r•'r. \ .1 \ iii V ~ /v ~ ~ ~ ~ ~ 1 ~ i •r pp + + + + \ ~ i ! ~ ///L1////////~/ + + + + ~ f - ~ FLUM FLOODWAY - - U R ~ i 75 CLASS B B FFE ~ ~ i + 732' +733 + + + \ 75 CLASS B OACHMENT UNE 1 ~ ~ : • ~ ~ ; ~ ENCR O II ~ i i ~ ~ ~ 1 I / ~ \ ~ + + + \ I ~ ~ + + 1 + + + ~ i 32,727 SF ADDmONAL ~ i \ . ~ I I 1 I + + + \ I ~i ~ ' ~t'~ ~ ~ l 1 ! ~ 1 UPLAND ZONE i 1 I 1~ 733 + + I t I ~ \ ~ I + / / / / / / / \ / ri ~ ~ ^ ~ ~ ~ ~ ~ C FE ? - - ~ 1 ? -i + ~ 1 A ' / ~ \ \ - ~S ED M ~ ~ - ~ + + + ' r l I ~ + + + l \ / + //X' / ~ ~ ~ it / ~ / \ ~ ~7,f32 ! / + + / / / r \ / / \ \ ~ i 1 r / /1 ? + \ ~ / ~ UM / \ ~ \ ~ + + / Z + ~ ~ ~ / p ~ ' ~ / ~ ~ NG ( MA i + ~ \ ~ F ~ J X / a ~ ~ ~ ~ r;ksi:, 1 ~ v i I t ~ / / o 1 ,.,.,.../r ~ / / ~ SEDIMEN ~ i / ~ ~ / / r I FOREBA r. ~ . ~ I I \ ~ / i/ / ~ I \ \ / z ~ ~ ! ~ ~ f f ~ ~ \ \ ( \ \ / a' ~ ~ ~ ~ 1 ~ / \ I Q \ 1 728 \ ~ ~ ~ ~ ~ / ~ ( i-1 ~ / / / I x i ` 1 f!1 ~ I I / ~ ~ ~ ~ 1 f ` I r ~ ~ ~ i ~ ~ Q i I ~ \ / \ , / ~ / - \ / i ~ ~ \ \ U i i I J ~ 0 i \ ( ~ ~ ~ ~ ~ ~ 1 ~ I I / Q j ~ / ao 00 0 ~ \ 1 ~ / i. I ~ ~ U ° ` j ~ g / 3 ~ ' f / U ~ vii c°~ r W o I , t i , ~ ' ~ / ~ W~ x ~ E-co X ~ ~ 1 1 1 o a ZZwo a / ~ ~S Zw W s Wp ~ / / W ~ ~zooQO aZ ~QfDM 1 ~ ~ 1 1 ~ l a a ~ / I ~ / U w Z z°JN~ ~ ~ 1 ~ 1 I / ZaQZi i U~ooi i / / W Q ~~0^00^0 ~ U U _MM J 1 1 1 ~ i ~ wo~~ z ~ J~aoao f ~ ~ ~ / ~ Q~o~ . w I ~ ~ i ~ / tAQp~j~ ~ NWO~~ ~ ~ ~ ~ ~ ~ H w \ I I / i I ~ \ ~ ~ ~ 1 / y: x. 1, 1 ,c~ _ - , r~ _ 1 ~ ~ \ / 1 ~i~ 1 ~ o 0 ~ 1 / ~o ~ I ~ . \ o ~ 1 I ~ ~ / I y F~ n`a l j M ° ~ ~ ~ rs - \ ~ ~ N a. / .z ~ z 'a ~ •d'1~%~3~ ~ t / \ / ~ .Q oQ I / CA ~ oc? ~ ~ ~ / ~ ~ ~,~~~~i ~ ~ 1 C C I ~ ~ ~J ~ a J~ \ I Z JOB ~ V.JpO / ~ I 1 ~ ~ 1 / / U m Z=oo~ / ~ ~ ~zorn ~ W OJpco~ I 4 ~ ~ ~ ~ ~ 7 7 J ~ ~ ~ / W ~ F J 7 Q M l'CL Cl i O N COQ -J CZ4 LU J t I 1 r 1 ~ I / I - I VIII l I 1 1^, I / / I \ 1 I I 1 ~ 1 J I I / ~l II ? I I 1 / \ , J I 1 -E s I / / r \ ~ 1 I I \ / r l 1 1 ;k. I r I / ~ r r I 1 1 1 1 I I ~ ~ ~ , u ui I I 1 1 ~ I ~ I I 1 ~ I i /1 1 ~ i I 1 ~ 1 11 ~ ~ r W 1 I ~ ~ 1 1 t 1 I I % / I I r 1 1 AV 40P dV" LL 0 1 n r 1 1 / 1 1`f ,,ti ~ ~ I ~ J I ~ 1 ~ r 1 i V 0 1 ~ \ I I 1- I /t I / / ! i 1 t I / LU ~ I Iii. I ~.~:,7 I I 1 I I I"' 1 r~ I ) I I I ~ { l i I I ~ U ~ 1 C ~ 00 / 1 1 1 z~ ~ 1 1 ~ ~ 0 I I i LLm I I I I / 1 ~ 1 ~ 1 I 1 r \ _ m ¦ W J W SHEET: D4 OF D20 File No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001LY1 XREF: DRAINAGE PLAN STATE\0300113ase N ~ H ~ U U U = z U Y Y Q W a ~ U Q cn ° D z c N N ~ ~ ~g W Z Z Z ~ S n. I PERMANENT POOL AR EA 22 895 SF ¦ ~U s OC ~ N M O ~ o _ ~ ~ M U LO N PERMANENT POOL A = REA 110 248 SF n ~ Q o 0 Q ~ EX. WETLANDS ~ ~ z EX. S TREAM x TO REMAIN ~ w EX. WETLANDS ~ ~ ~ wy~; . x Danz ?....~v.Y., TO REMAIN ¢ w a ~ i~it.t ?,~M?J~.• ~?w~~r r~ ,r,,;, Z v,,. - .r 0 ~ N SURFACE AIWA 8 'r ~ ~ ~'~A` 9,1.•..x.,., ~s,i ~ v ^x N • YCllplppl~,,,neo.•.•,,., ~ Z • . I~EtiAY Y ~ ~ Q 2193 SF t )3~' ~ ~ , ~ ~Y, EX. NDS ~~u.. ..y, I'.k .j~ ~ ~ i 44 TO R ~i°cwolna f~ ~ : EX DS v ~ o 0 t CO O A ,,,.7!..,,,....! N 'il~ '~`i ~ F' ~ FII 7 yi,„,„,,,,,,,,,,:: . r,.,,,,.u,,..,.,!: . 11 F ~",iiiiiiiiiii%: {iiii). ~yj . u,,,, • . ~ i i .iii, •vuuuN,• LA_I J Q ~ .'~r v" rG~r ~ f ~ ih '.n y~~. ru,,,,,n .,,,i . ,u,,,e~ ~'1,,,~ C V i ~ •.",i„ . EMI fn U N 5~,, . r u:. : '4. " ~~w 'fir » r ~l ~ glllllllllllil 1111 11 Ngryl~/'i ~ 'r. M1~. I. ~ 11111 ~ 4~~~ 'I V. - ~ eeoeooee /'~i I G - ; ~ ee t ~ F1>fIEBAY ~ ee~ 1 De M ~e ~ o In • e~ a e ~ ~ ~~5,to h l 1 =Qa n Wo a - o ~ 2 = Q t, ; 1~ c V eN 00 ~ .,o eW N1, o =~r~ ~ eey, O e r c).,a~gr ~ q~ Q e eeee 0o C ~ 0 ~q~li 111111 1 ///llllplilllliglllllll Ry ' Y~ ~4 r, • 0) t~ X Y;"Y .y V ~ ~ Q 4 4~~~p f r ~ ~yy~ • ~ ~ . A°'PJ i 4~~-- ~ i .5, r e. y~ f ~t ~ k. k b 0 r ..~t r b. G ¦ t . t, , } 'i'~~~'- ~,,yc 1. a~ T ~i a Q h it , 9 J~ O ~ 9~ i.5 P1(~ ~ r.. ~ ~T , ry Q „ . , M. ~II1 _ f47 DRAINAGE AREA = 0. ~ . 3~, Z w« ~ f" ~ G I= sa, cn w 4, o A ~i ; 1 O ( i~ ~ D 0 f D ~ ~ d z 'ti;r D i- / / ~ j _ ~ a DI DRAINAG AREA -1.06 Ac ~ - D ~ 0 M a I o a o DRAINAGE = N AREA 1.16 Ac. o ALL STORMWATER MANAGEMENT AND U ~ Z v > o BMP REQUIREMENTS FOR THIS PARCEL ,Aa.,.:: ,1 ~ ~ (nN WILL BE TREATED SEPARATELY WITH ~ k' ~ ~I -w x ~Zw a '7~3zW ~ Zt3~`'oo w X Q Li ITS FUTURE DEVELOPMENT. THE DRAINAGE OUTFACE FOR THIS PARC W ~~-IZao~ ~ ZZ ~acor~ M Q„ EL WILL NOT BE CONVEYED THROUGH Q W ~tpcv U W ~~N Z .J Z~Nn Z az I I ~ K p~ i t LC) LO n THE MALL PROPERTY. ~¢a00p ~ V V NN i N M OG ~wo~~ z~Z~~~ n n z°~~ ~ avo~ M DRAINAGE ARE~c = 0.96 ~ Q ~ ~ ~ N W ° o A 5 ~w v~ ~o M O M i_ ~ ~ • - i _ ~ - I i~ o 0 o M W M wM ~ F-M t-~ / t=/1~ ~ (n '07 ~ ~ ~ fn ~ °a a / F.. 0 oc? U U x Z Y~ x X J ~ Q ~ !n c J J Q C C.~JOCOD U m Z=~~ ~ ~ ~zorn = ~ oocor O to LO a ~VL! o~r~irri Q ¢ ~w~~ i 00 _r zC~f~~ ~ C7 NLiNN N ~ O¢00 p~~st 1 e NN ~ n _....NN N Q Z J EXTENDED DETENTION WETLANDS AREA MAP W ~ SCALE: 1"=200' BIORETENTION AREA MAP ~ a SCALE: 1°=200 ~ W = LEGEND a =J o 0 TO STORMWATER TREATMENT AREA U11LI7JNG THE NATURAL FLOODPWN > mi z A-50.10 Ac. BIOFEI"BVTION AREAS ¦ MAJOR DRAINAGE DIVIDE W uj _ TO EXTENDED pETEN71pW WETLAND #2 A=fl.46 Ac. DRAINAGE AREA TO BIORETEN11ON MAW OUTFACE TO EXTENDED DETENTION WETLAND #3 A-73.89 Ac. WETLANDS TO REMAIN a ..J ~ v ~ m O W Z mi v L W 9le No. NC Tax Yap No. Job No. 03-001 Cadd Dwg. File: DRAIN AGE/030016MP XREF: DRAINAGE PLAN STATE/030016ASE SHEET: D5 OF D20 N ~ EPTH DISTRIBUTION REQUIRED: ~ 0 GENERAL NOTES: MINIMUM EXTENDED DETENTION WETLAND AREA D U U U 1. SEDIMENT FOREBAY 20% OF PERMANENT POOL AREA} ( z ALL OF THE EXTENDED DETENTION WETLANDS (BASINS #2 AND #3) WERE DESIGNED IN " U - CONFORMANCE WITH THE RULES CONTAINED IN THE NCDENR STORMWATER BEST 2. HIGH MARSH 35~ OF PERMANENT POOL AREA, 0 TO 9 DEEP) ~ ( a ,a MANAGEMENT PRACTICES MANUAL FROM APRIL 1999. ALL OF THE BASINS HAVE BEEN DESIGNED TO ACHIEVE 85~ TOTAL SUSPENDED SOLIDS (TSS) REMOVAL, AND THE FIRST ~ INCH OF RAINFALL WILL BE RELEASED OVER A DRAWDOWN PERIOD OF 48 TO 120 U o HOURS (2 TO 5 DAYS). RUNOFF CONTROL MEASURES SHOWN ON THIS PLAN HAVE F PERMANENT POOL AREA 9" TO 18" DEEP N 3. LOW MARSH 35~ 0 ) ( ~ z c + + + + + + N BEEN DESIGNED TO MEET OR EXCEED NORTH CAROLINA STATE GUIDELINES FOR + + + + + N EXTENDED DETENTION WETLANDS. + + + + + + tl• ~ Q OC Z 4. MICROPOOL 10% OF PERMANENT POOL AREA) w z ~ z ~ 5 a I ¦ ~ U 5 ~ ~ c~ M O ~ o _ ~ ~ ~ N r ~ N ~ Q Q ~ o 1. CALCULATE PERCENT IMPERVIOUS COVER DRAINING TO TREATMENT AREA #1; 1. CALCULATE PERCENT IMPERVIOUS COVER DRAINING TO BA! OVER DRAINING TO BASIN 1: ~ ~ N ; 1. CALCULATE PERCENT IMPERVIOUS C # Z LL AINING TO BAST #1 W AMOUNT OF IMPERVIOUS AREA = 45.10 Ac. = AMOUNT OF IMPERVIOUS AREA = 10.16 Ac. = 89% AMOUNT OF IMPERVIOUS AREA 59.04 Ac. _ ~ LL 90% TOTAL SITE AREA TO BASIN #1 50.10 Ac. TOTAL SITE AREA TO BASIN #1 11.46 Ac. = = 89% _ - 80% 0 N Z TOTAL SITE AREA TO BASIN #1 73.89 Ac. w a ~ z , ~ ~ N Z Q ~ 2. DETERMINE AVERAGE PERMANENT POOL DEPTH: 2. DETERMINE AVERAGE PERMANENT POOL DEPTH: . 2. DETERMINE AVERAGE PERMANENT POOL DEPTH. ~ W ~ 111 0 J c~ EPTH = 3.0' U ~ O ~ PERMANENT POOL D n ~ PERMANENT POOL DEPTH = 3.0' PERMANENT POOL DEPTH = 3.0' ? V N .r o i i d 7 3. FlND CORRESPONDING NUMBER FROM TABLE 1.1; 3. FIND CORRESPONDING NUMBER FROM TABLE 1.1: RESPONDING NUMBER FROM TABLE 1.1: 1.1. 3. FlND COR ~ i Table 1.1 Surface Area to Drains a Atea Ratio For Permanent pool Sizin For 8596 Pollutu?t Table 1.1 Surface Area to Drainage Area Ratio For Permanent pool Stufioe Ares to a Area Ratio For Permanent pool Sizutg For 8596 Pollutant n Permanent pool Sizing For 8596 Pollutant Table 11 1ka?nag 8 8 Removal Efficiency in the Piedmont Removal Efficiency in the Piedmont Removal Efficiency in the Piedmont ```,?d~d~nauHUrurNriipr 96 Impervious - Impervious Cover 3.0 4.0 5.0 6.0 7.0 8.0 9.0 ~Yef 3.0 4.0 5.0 6.0 Covet 3,p 4.0 5.0 6.0 7.0 8.0 9.0 ~ ~ Mo°7Y 6.0 7.0 $.0 9,0 • °o N ~ °o ~ r~~? SQ° ~W° e 207_ 0,44 20 0.97 .79 0.70 O.S9 0.51 .46 0.44 z V oW N N -o .0.59 0. 1 .46 20 0.97 0.79 0.70 .0.59 0.51 0.46 .44 2p .97 .74 0.70 .0.59 0.62 ~ S ~ ~ .8 0.70 0.64 .62 30 1.34 1.08 .9 0.8 0. 0 0.64 ~ Y odd oo ~v 30 1.34 1.06 0.47 0.83 0.10 0.64 62 3 1'.34 1.08 0.97 .8 4p 1.73 1.43 1.25 0.90. 0.82 .77 % 0 oa° °oo° ~ .90 • . 2 .T7 40 1.73 1.43 1.25 1.7 0.90 0.82 0.77 SO 2.06 1.73 1.30 1.09 1.00 .R2 50 2.06 1.73 1.30 1.30 1.09 1.00 .0.92 SO 2.06 1.73 1.50 130 L09 1.00 .0.92 ~r~rrri~i n~~````~ 1.30 nurnnaoinn 60 2.40 2.03 1.71 1.51 1.29 1.18 1.10 60 2.40 2.03 1.71 L.51 1.18 1.10 60 2.40 2.03 1.71 1.51 1.29 1.18 1.10 L.51 1.29 70 2.88 2.40 .07 1.79 1.54 1.35 .26 70 .8 2.40 .07 1.7 1.54 1.35 1.26 7 2.66 2.40 .07 1.79 L54 1.35 1.26 1.7 a BO 3.36 2.78 2.38 2.1 1.86 1.60 1.42 BO 3.36 2.78 2.38 21 .86 1.60 1.42 80 ` 3.3fi 2.7B .3 0 1.86 1.60 1.42 0 21 1 90 .74 3.10 2.66 2.34 2.11 1.83 1.67 90 3:74 3.10 2.66 2.34 2.11 L83 L67 g0 3.74 3.10 2.66 2.34 2.11 L83 1.67 2.34 'van in the bod of the table are 'van in to Notes: Numbers 'van io the body of the table ate given in pet+ceotag Notes• Numbers g< y gr p~ gas ~ 'ven in Nodes: Numbers given is the body of the mble are given in paxnmges. Br petstomges Coastal SAIDA ratios can be obtained from the local DWQ Regional Office. Coastal SAlDA ratios rxn be obtained from the local DWQ Re the local DW Re 'ono! Office. Coastal SANA ratios son be obmined from the IoaJ D'WQ Regional Office. Q 8? M NAGEMENT PRACTICES NCI FROM: STORMWATER BEST MANAGEMENT PRACTICES, NCDENR, APRIL 1999 FROM: STORMWAIER BEST A , ~ FROM: STORMWATER BEST MANAGEMENT PRACTICES, NCDENR, APRIL 1999 RACIICES, NCDENR, APRIL 1999 4. DETERMINE REQUIRED SURFACE AREA: 4. DETERMINE REQUIRED SURFACE AREA: 4. DETERMINE REQUIRED SURFACE AREA: NUMBER FROM TABLE 1.1 ABOVE = NUMBER FROM TABLE 1.1 ABOVE x NUMBER FROM TABLE 1.1 ABOVE x A AREA =SURFACE AREA x CONTRIBUTING DRAINAGE AREA SURFACE AREA CONTRIBUTING DRAINp 3UTING DRAINAGE AREA =SURFACE AREA CONTRIBUTING DRAIN GE 100 100 100 z 3.74 3.74 3.36 F x 73.89 Ac. = 2.48 Ac. = 08,141 S (SURFACE AREA REQUIRED) i Ac. = 18,670 SF (SURFACE AREA REQUIRED) - x 50.10 Ac. = 1.87 Ac. = 81,620 SF (SURFACE AREA REQUIRED) - x 11.46 Ac. = 0.43 Ac. = 18,671 100 100 100 U w SURFACE AREA PROVIDED = 82,193 SF SURFACE AREA PROVIDED = 22,895 SF A PROVIDED = 110 248 S SURFACE ARE , NOTE; 0 STORMWATER TREATMENT AREA #1 UTILIZES THE NATURAL 5. FlND VOLUME TO BE CONTROLLED FROM 1" STORM: CONTROLLED FROM 1" STORM: Z STORM. 5. FlND VOLUME TO BE FLOODPLAIN AT THE OUTFACE OF THE PIPE. THE COMPUTATIONS ABOVE DEMONSTRATE THE SURFACE AREA TO BE CLAIMED BY THE NATURAL DOWNSTREAM AREA. THE DESIGN RUNOFF VOLUME (THE TEMPORARY WATER Ql 4RY WATER QUALITY THE DESIGN RUNOFF VOLUME (THE TEMPORARY WATER QUALITY cn I SEE SHEET D17 FOR OUTFACE DETAIL AND RIP RAP POOL} TO BE CONTROLLED MUST BE HELD IN THE BASIN N THE BASIN ABOVE POOL) TO BE CONTROLLED MUST BE HELD IN THE BASIN ABOVE THE PERMANENT POOL LEVEL. Q COMPUTATIONS. THE PERMANENT POOL LEVEL. U u 0 USING THE RUNOFF VOLUME CALCULATIONS IN THE "SIMPI IN THE "SIMPLE USING THE RUNOFF VOLUME CALCULATIONS IN THE SIMPLE ~ METHOD" AS DESCRIBED BY SCHUELER (1987): ;7 ; METHOD" AS DESCRIBED BY SCHUELER (1987}: Q 00 0 Q ~ o N SURFACE AREA OF STORMWATER TREATMENT AREA UTILIZING THE NATURAL FLOODPLAIN Rv = 0.05 + 0.009 (I) Rv = 0.05 + 0.009 I U r ~ -M Z voi N STORM RUNOFF (INCHES) ~ STORM RUNOFF WHERE Rv =RUNOFF COEFFICIENT = ~ URM RUNOFF (INCHES) Rv =RUNOFF COErF1CIENT = k WHERE _ W ~ X ~ ~ ° x STORM RAINFALL (INCHES) o a Z Z wo a x STORM RAINFA~L ORM RAINFALL (INCHES) ~ zw ~ Z3 0 ~ I M IMPERVIOUS PORTII w ~zap~ ~ ~Qcor~ U w ao~~ Z zOJN~ :RVIOUS PORTION OF DRAINAGE AREA ACRES I =PERCENT IMPERVIOUS = CO I =PERCENT IMPERVIOUS = DRAINAGE DRAINAGE AREA ACRES Z a z l i O~ o° i l ( ) ~ Q07pp U U NN DRAINAGE AREA (ACRES) W ~ _ z I N M (n WpC~tD ~ JQ~,,.'1~000 00 r~ ~ tai~MM ~ V O>MM = 80 = 0.77 IN. IN. Z ~narn" 3 ~W°~° M O M Rv = 0.05 + 0.009 (89) = 0.85 (IN./IN.) Rv 0.05 + 0.009 ( ) ( / ) g ~ww y ~o~ VOLUME TO BE CONTROLLED: VOLUME TO BE CONTROLLED: IMPERVIOUS POR110N OF DRAINAGE AREA ACRES VOLUME _ (DESIGN RAINFALL} (Rv) (DRAINAGE AREA) 4GE AREA VOLUME _ (DESIGN RAINFALL) (Rv) (DRAINAGE AREA) 1 FT. 1 FT. VOLUME = 1 INCH x 0.85 IN./IN. x x 11.46 Ac 12 INCH - x 11.46 Ac. VOLUME = 1 INCH x 0.77 IC4,/IN. x x 73.89 Ac. o •H 12 INCH o ~ ~ M W th LiJ p ~ Q F~~ VOLUME = 0.812 ACRE-FEET = 35,360 CF VOLUME = 4.741 ACRE-FEET = 206,530 CF N p,. ~ ~ :Q ~ °QZa rn ~o O Oo THIS VOLUME WILL BE DRAWN DOWN OVER A PERIOD OF A PERT D F 2 TO 5 DAYS. THIS VOLUME WILL BE DRAWN DOWN OVER A PERIOD OF 2 TO 5 DAYS. t- _ ~ U ~ _ 0 0 U z_ Wc~ X a Z _ NJ a JJ ~ Q 3JOQO CD ~ U' JOCOO > O > CD > tf> >I~ I >co 4 UMI J N Y~ _ ` ~ ~ O mot' sF ~1I ~'-"n~l.__ - _>n-_~- \ _ 1 r\ n' ~ ~ ~ N N 0 ~ mN N 4 N - - - - - - - - - - - - - 1 - - - - - - - - - - - - - - - JET-\ 1 \11^1 1741 c r x /I Ix ,I A \ 'M \ ~ ~\I 1^ 7.++\ ` ~~/t VX1/l~~l/~il,r/'~ + t \ ` 1` ~1 I ••.l:`. U 73P U U DO 0,- OQOpQO O \ \ \ 1Y ' 4 \ r \;g l l ` ` \ I III i 'fe ] i ' \ \ . 111 ' + / { f Y~/1++ /V /i „r \ \ 1111 ~i - i ~t h t 1 \ \ r W 77/ ` \ \ \ t 1 5 I \ \ \ / l \ \ + + \ \ 15l 115 ,r 1 1 C \ \ \ V 1 ' ! I I J III \ { + + / / / /f / / _ I 1 I I I f f b 1 \ \ \ - / / I 1 1 lllr f 1 k t \ \ ? + r////A/// III \t ` ~ Jf / / / / / ~ i i/ 11 i/I 1 1 14r I! 1 \\1! + + //X'~i .A•//`+41 IJ I1 \ 1 \ \ \ 1 ! / r , r\ + X32, ~ i l / \ \ 0 l1 l \ G sum. r / 174 sl~,,\, + + X LLJ / + + + ~~7/d4 \ 1 1 / 1 r// / 1 / / I I I I °o \ `>y. x\111 OK I e, 0 / / I 1 I / , 1 \ ` UJ kill I / IV / - \ , 3r. i~ 1 \ / C D / - \ I \ r I r r - r t `i / ` l _ W OF UJ u I / / \ 1.ID1~ / ~ V V 15 `v i / 111111lI / u STORMWATER TREATMENT AREA (SEE SHEET D18 FOR DETAIL) EXTENDED DETENTION WETI-AND #3 (SEE SHEET 19 FOR DETAIL) ETLAND #2 W UTILQING THE NATURAL FLOODPLAIN (SEE SHEET D17 FOR DETAIL) SCALE: 1"=50' E SCALE: 1"=100' =50' SCALE: 1"=100' SHEET: D6 OF D20 20 rile No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001BMP1 XREF: DRAINAGE/03001 BASE i I DWQ Project No. DWQ Project No. ~ ~ 0 DIVISION OF WATER QUALIT1f •401 EXTENDED DETENTION (and POCKET') WETLAND WORKSHEET DIVISION OF WATER QUALITY -401 EXTENDED DETENTION and POCI~T' WETLAND WORKSHEET U U i ? U I. PROJECT INFORMATION (please compMte the folowing information z I. PROJECT INFORMATKfN (please complete the following information : U ProjeclNeme: t\}0{~:~NL.AtLE U1L.l.AL, Project Name: NOiZ.~Ht.AtLE Uit_~ACti Contact Person: ,~I;~A Kul ti~E~-SMA N r~ Phone Number: f~3} .53 t - b t e 3 Contact Person: A1JSA KuEb~Ei-SMAktJ Phone Number: f~3) 532•b163 a ¢ For projects wish multiple basins, ~edfy which basin this worksheet applies to: E-fl W ~ Z For prgects vui#h multiple basins, spegfy which basin this worksheet applies to: EwJ ~ 3 W ¢ Permanent Pod E~vation '~33.OU ff. (elevation of the orifice invert out) ~ ~ Permanent Pool E~vation X34 , Oo ft. (elevation of the orifice irnert out) U ~ 0 temporary Pool Elevatarr 3~ . l ~ 'alga+rar ;i +he :~:flrt 3trlchara 'rir~,r`'r' Temporary Poo4 Elevation .31 ft. (eleratfen of ~ swe irwett n) N ~ 0 ~ Z O Permanent Poi Surface Area 22 9 5 sq. ft. (water surface area at permanent pool elevation) Permanent Pool Surface Area t 2.'t sq. ft. {water surface erg at permanent pool elevation} N 10~ 8 Drainage Area u , `t 6 ac. (on•siie and off-site drainage to the basin) impervious Area t t .'t b ac. (on-site and off-site dreinage to the basin) Drainage Area ~ 3. >3 ac. (on•site and off-site drainage to the basin) ~ Impervious Area ~ 3.89 ac. (on-site and oiFsite drainage to the basin) ~ g Forebay Surface Area 4 r 5 sq. ft. (et permanent pool elevation appro>omately 15°/0)* ~ Z Forebey Surface Area j-2,,0 Sa sq. ft. {at pemmanent pool elevation approximately 15°k)' W Marsh 0"-9" Surface Area ~8 0_+ 3 sq. ft. (at permanent pool elevation appro>amately 35°/°)* Marsh 0`•9' Surface Area 5 B~ . ft. at ermanent ool elevatan rozimatel 35%' Z ~~sq l P P aPP y) Z~ Marsh 9"•1 tl" Surface Brea i2 r o t 3 sq. ft. (at permanent pool elevation approbmately 35°/0)* Marsh 9`•18' Surface Area 3 5 sq. ft. (at permanent pool elevation appro>ama~ly 35%)` 5 Micro Pool Surface Area Z ~ t q 0 sq. ft. (et permanent pool elevation approximately 15°~)* Micro Pool Surface Area 1 r 0 2 sq. fk {at permanent pool elevation approzimatefy 15°h)' ~ Temporary Pool Volume 2q Sto cu. ft. (volume detained on top of the permanent pool) Temporary Pool Volume I ~t 9 q ? ~ cu. ft (volume detained an top of the permanent pool) ~ ~ s O ~ o M 2 `f5 ! SAIDA used ~q R ~ r 9 - i2_ (surface area to drainage area retio)* +io 2+r2 l ~ = i ~ O Diameter of Orifice I.50 in. (draw down orifice diameter) SAf DA used 3 Zi g ~ (surface area to drainage area ratio} U N Diameter of Orifice 3 . Sy in. {draw down orifice diameter) ~ N ~ ~ J ^ W~ F-- II. REQUIRED ITEMS CHECKLIST II. REQUIRED REMS CHECKLIST N J ~ a 0 Q v Q O Initial in the space provided to indicate the following design requirement have been met and supporting documentation is attached. If a Iratial in the space provided to indicate the fdk~vving design requirements have been met and supporting documentation is attached. (f a Z requirement has not 6eer? met, attach an explanation of why. At a minimum, a complete stomwuater management plan submittal includes requirement has not been met, attach an explanafien of why. At a minimum, a complete stortnwater management plan submittal includes (D a worksheet for eadr BMP, design calculations, plans and specificatror>s showing all BMPs and outlet structure details, a defailed a worksheet for each BMP, design calculations, plans and spedficatans showing all BMPs and. outlet sUuclure details, a detailed ~ LL drainage plan and a fully executed operation and maintenance agreement. An inwmplete submittal package will result in a request for additional information and will substantially delay final review and approval of the project drainage plan and a fully executed operation and maintenance reement. An incom late submittal dra a will result in a r uest for ~ ~ Z a9 P pa 9 eQ additional information and will substantially defy fmaf review and approval of the r 'ect P~ W Q licants Initials _ tL _The temporary pool controls runoff from the 1 inch rain. Z hcanis Imhals ~ i _The temporary pool controls runoff from the t inch rein. Q ~ fY N The basin side slopes are no steeper than 3.1. Z The basin side sl es are no st er than 3:1. Q- Q op eep ~ W 4. ~L A planting plan for the marsh areas with plant species and densities is provided. A planting plan for the marsh areas with plant species and densities is provided. ~ J M l~ Vegetation above the permanent pool elevation is specified. Vegetation above the permanent pool elevation is specified. U ~ ~ p An emergency drain is provided to drein the basin. An erner n dram is rovided to dram the basin. Z ~ ~A ~ _ 9e oY P ~ U N ~i o O S ~~The temporary pool draws down in 2 to 5 days. Segment storage is provided in the permanent pool. tai __,_The ~mporary pool draws down in 2 to 5 days. n Sediment storage is provided in the pem~anent pool. a N Cn 5E ruc'rF A sediment disposal area is provided. Nv i~ = R [.t,. SEDt kt:.rJ ~ W. Ls. 5E uo'~F_ Asedimentdisposalareaisprovided. N~i~~ AU.. SEDik~N ~ Wlu.'DE. i ¢ w _~_Ac:cess is provided for maintenance. '1LEHO ~ E~ ~.cit-r 5 ,'r~E , Access is provided for mantenance. REKO v ~i2oN 5 ,'rE , a U ~1,t. A sde specrfx, srgnetl end notarized operation and maintenance agreement is provided. ~ A site specific, signed end notarized operation and maintenance agreement is provided. can N _ The dreinage area (including any offsite area) is delineated on a site plan. Acoess is provided for maintenance. The drainage area {including any offsite area) is delineated on a site plan. Access is proved for makrtenarz;e. Plan details for the wetland are provided. Plan details for the wetland are provided. „~,~~~~uuuuurp~~ L Plae details for the inlet and outlet are provided. Plan details for the inlet and outlet are provided. ''~~i,,~~ _ ~G ,_A site spa~itic operation and mainfenanca agreement, signed and notarized by the responsible party is provided (see A site specific operation and maintenance agreement, signed and noter¢ed by the responsible party is provided (see °eaaaoo ~ o° ~ hffp:!lh2o.ehnr.state.nc.uslncwetiandsloandm.doc). * Pocket Wetlands have different design paremeters and are only assumed to remove 35%TSS - Sae pp.19and 20 of the NC DENR ht~:lih2o.ehnr.state.nc.uslr>cxretlandsloandm.doc). ~ °o° 7';; 'Pocket Wetlands have different design parameters end are only assumed to remove 35°k TSS - See pp.19and 20 of the NC DENR Do ~ M °°°~'N Stormwater BMP Manual, Apri(1999.10°/o open water, 50°k high marsh, 40°/° low marsh. O J ~ 4~0 Stormwater 8MP Manual, April 1999. t0% en water, 50%hi h marsh, 40°/0 low marsh. = ~ ~,,ro oP 9 SUeN apnp~Zo..~e aW N N S° ~ o°~ Y o°,Q~ 'p~ia?mmmu~n~~~ WETLAND DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT (NORTMLAKE VILLAGE -EXTENDED DETENTION WETLAND #2) ERATION AND MAINTENANCE AGREEMENT ~ WETLAND DETENTION BASIN OP o (NORTHLAKE VILLAGE -EXTENDED DETENTION WETLAND #3) The wetland detention basin system is defined as the wetland detention basin and pretreatment including the wetland detention basin and retreatment includin The wetland detention basin system is defined as P 9 forebays. forebays. Maintenance activities shall be performed as follows: Maintenance activities shall be performed as follows: 1. After every significant runoff producing rainfall event and at least monthly i ' ' nt runoff roducin rainfall event and at least monthly: 1. After every s grnfica p g a. Inspect the wetland detention basin system for sediment accumulation, erosion, trash accumulation, vegetated cover, and general condition. a. Inspect the wetland detention basin system for sediment accumulation, erosion, trash accumulation, vegetated cover, and general condition. b. Check and clear the orifice of an obstructions such that drawdown of the temporary pool occurs within Y b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within 2 io 5 days as designed. 2 to 5 days as designed. Z 0 a 2. Repair eroded areas immediately, re-seed as necessary to maintain good vegetative cover, mow 2. Repair eroded areas immediately, re-seed as necessary to maintain good vegetative cover, mow vegetative cover to maintain a maximum height of six inches, and remove trash as needed. ve etative cover to maintain a maximum height of six inches, and remove trash as needed. o 9 3. Inspect and repair the col'sction system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain proper functioning. 3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to maintain proper functioning. d 4. Remove accumulated sediment from the wetland detention basin system semi-annually or when depth is v ccumulated sediment from the wetland detention basin system semi-annually or when depth is Z 4. Remo e a I reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed reduced to 75% of the original design depth (see diagram below). Removed sediment shalt be disposed of in an appropriate manner and shall be handled in a manner that will not adversely impact water quality of in an appropriate manner and shall be handled in a manner that will not adversely impact water quality (i.e. stockpiling near a wetland detention basin or stream, etc.). t ~ (i.e. stockpiling near a wetland detention basin or stream, a c.). g The measuring device used to determine the sediment elevation shall be such that it will give an accurate depth reading and not readily penetrate into accumulated sediments. The measuring device used to determine the sediment elevation shall be such that it will give an accurate de th readin and not readily penetrate into accumulated sediments. P 9 When the permanent pool depth reads 0.0 feet in the main pond, the sediment shall be removed. I de th reads 0.0 feet in the main ond, the sediment shall be removed, Q i' .When the permanent poo p P oo S For stormwater wetlands: If the elevation of the marsh areas exceed the permanent pool elevation, the For stormwater wetlands: If the elevation of the marsh areas exceed the permanent pool elevation, the Q o N sediment should be removed to design levels. This shalt be performed by removing the upper 6 inches of v t desi n levels. This shall be erformed b removing the upper 6 inches of N o sediment should be remo ed o g P Y U soil and stockpiling it. Then the marsh area shall be excavated six inches below design elevations. t ix inches below desi n elevations. Z ~ W ~ soil and stockpiling it. Then the marsh area shall be excava ed s g Afterwards the stockpi+ad soil should be spread over the marsh surface. The soil should not be stockpiled t stock fled ~ ~ ~N Afterwards the stockpiled soil should be spread over the marsh surface. The soil should no be p ~ ~ Y ~ ~ X for more than two weeks. for more than two weeks. > 3 ¢ Z Z W o a Z w t5 0 ~ ¢ When the ermanent pool depth reads 4.5 feet in the forebay and miaapool, the sediment shall be p W ~ ~Z00p0 ~ ZZ ~atDM ~ Q W d'cptG c0 M co c0 removed. When the ermanent pool depth reads 4,5 feet in the forebay and micro-pool, the sediment shall be U W ; ~ ~ Z ~ Z ~ N P ZaQZi i OQooi i N Ul) I I N N removed. W N v U M V) W ~ [O fD Z ~ J o! °000 M M no 00 BASIN DIAGRAM Z ~~rriM Q U o~r+)MI'7 BASIN DIAGRAM ~ Q i. r~ 3 N w o 0 O O (~f! In the blanks) Alin the blanks g --w~- ~ ( ) w Permanent Pool Elevation 733.0 0 Q Permanent Pool Elevation 734.0 Sediment moval EI.728.5 7 /o Sediment Removal Elevation 7330 0°/° Sediment moval EI.729,5 7 /o Bottom E vation ~ 5% - Sediment Removal E4evatlon 734.0 0% ° Bottom E vakion 728.0 5% o ° g o ~ M ~O FOREBAY MAIN POND MAIN POND ~ ~ Q ~ ~ FOREBAY a. }}Q fA -Z ~ a 5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These 6 3 ~ ~ p C~ 5. Remove cattails and other indigenous wetland plants when they cover 50 of the basin surface. These _ ~ U plants shall be encouraged to grow along the vegetated shelf and forebay berm. alo the ve etated shelf and foreba berm. U Z ~ W ~ plants shall be encouraged to grow ng g y x ~ a Z Q~ a X 4 L~ NJ 4. Q J J LL O O O co Wetland planting densities in the marsh areas should be maintained by replanting bare areas as needed. Wetland lantin densities in the marsh areas should be maintained by replanting bare areas as needed. _ ~ J ° ~ ~ ~ ~ o P 9 U =orn m o=~~ 00 U') co 1-_ Wetland plants should he encouraged to grow in the marsh areas. Wetland plants should be encouraged to grow in the marsh areas. oC ~ ~ o , i ~ ~ ~ o , ~ a ~ ~~M~ a ~W~~ Z n^ ~ C7 aLL.NCV I 1 00 co `n Ul-) 6. If the basin must be drained for an emergency or to perform mainte~.ance, the flushing of sediment - o ~ ~ W W o-~-- N N 6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment through the emergency drain shall be minimized to the maximum extent practical. ~ ~ 0 0 00 throu h the emer enc drain shall be minimized to the maximum ~~xrent practical. ~ ~ ¢ N ~ o J ~ N g g Y 7 a M i.,..,..~. c N m..,,~.,, d N N 7. All components of the wetland detention basin system shall be maintained in good working order. 7. All components of the wetland detention basin system shall be mai stained in good working order. 8. Level spreaders or other structures that provide diffuse flow shall be maintained every six months. All 8. Level spreaders or other structures that provide diffuse flow shall be maintained every six months. Ali accumulated sediment and debris shall be removed from the structure, and a level elevation shall be accumulated sediment and debris shall be removed from the structure, and a level elevation shall be z maintained across the entire flow spreading structure. Any down gradient erosion must be repaired and/or z maintained across the entire flow spreading structure. Any down gradient erosion must be repaired and/or replanted as necessary. replanted as necessary. J J I acknowledge and agree by my signature below that I am responsible for the performance of the seven I acknowledge and agree by my signature below that I am responsible for the performance of the seven Ui 0 maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to the system or responsible party. changes to the system or responsible party. ar~oe LLC ' R , L o i+ ,,P- L. Print name: L C. Print name: Title: a ?zec1 S ' r Title: acizzd ~a' ~~c W C 1cew~~~~ 16 I Ll$3C3q ~ ~:z y E Lan% LL C Address: p aoo E. HAJ, +1~ %i Ic Addre T T C ~>C Phon -).4% -a5$-b1 o0 r\ vv i H Phone. Si9natu Signature: J Z Date: b 6 Date: G cc cc homeowners association unless more than 50% of the ~ Note: The legally responsible party should not be a homeowners association unless more than 50% of the Note: The legally responsible parry should not be a lots have been sold and a resident of the subdivision has been named the president. lots have been sold and a resident of the subdivision has been named the president. n v a Notary Public for the State of i 1 a a a Notary Public for the State of c Z v of ti t~ cw~b do hereby certify S CountYof ice mb , do hereby certify that e L County Y Y that Lj, personally appeared before me this 3 r day of 'Tw&g- a.G 4 3 , and acknowledge the due personally appeared before me this r _ day of u e ' so and acknowledge the due execution of the forgoing wetland detention basin maintenance requirements. Witness my hand and official execution of the forgoing wetland detention basin maintenance requirements. Witness my hand and official seal, KAREN A. MORENCY seal, OUMI RRM& Msoam ! Coumy, MI KAREN A. MORENV p In tlN&W Co., U My Comndsslon EVims 1212712007 Nobry Pkft, Mom* County, MI Ac" in Odd Co., I>N My Comm won b9m 1212112007 m 0 s 0 0 W u LL Z J SEAL SEAL W u My commission expires • a ~l My commission expires e E File No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAIN AGE/03001BMP1 SHEET: D7 OF D20 ~o BIORETENTION AREA COMPONENTS ti N ~ ~ 0 THE SIX MAJOR COMPONENTS OF THE BIORETENIION AREA ARE: U U, U GRASS BUFFER STRIP = Z 810RETENTION AREA LIMIT FLOW PAVEMENT PONDING AREA U FLOW PLA ~ N11NG SOIL Q Y SAND BED W a ORGANIC LAYER OR MULCH ~ 4'~~• PLANT MATERIAL t~ ~ 32',0., ' ' ' ' ' • ' GRASS BUFFER STRIP Z p ~ N 4' _On 3' I ' 15 MIN. ~ N ~ ~;.y . . - _@~~:.rrs . . _ ~ , , ~ THE GRASS BUFFER STRIP IS LOCATED BETWEEN THE IMPERVIOUS SURFACE AND THE ~ 8• N ~ , ~6 LENGTH p • • ~ BIORETEN110N AREA. IT FUNCTIONS TO REDUCE THE RUNOFF VELOCITY AND FILTER p~ Q A (CURB QPENlNG) A • • o PARTICULATES FROM THE RUNOFF PRIOR TO DISCHARGING TO THE BIORETEN110N AREA. W Z p ~ Z ~ i F( • 0 Z ~ Ow b • ~ ~ 0 S ~.v~~~ ~ _ . . _ _ . ..~r . n ~ ~ : ~ ? ~ • • ~ - PONDING AREA ~ ~ ~ ~ V ..........2 MIN. • • • • • • • THE PONDING AREA OVER THE ROOT ZONE PROVIDES FOR SOME SURFACE STORAGE OF OC pC s F[Ow THE STORM WATER RUNOFF, AND PROVIDES FOR THE EVAPORAl10N OF A PORTION OF O p ~ o INLET DEFLECTOR °s~ e i ~ CUR THE RUNOFF. SETTLING OF THE PARTICULATES THAT HAVE NOT BEEN FILTERED BY THE N i J (SEE DETAIL THIS GRASS BUFFER OR THE SAND BED OCCURS IN THE PONDING AREA. ~ SHEET} T' PLAN J 3' fp? ~ IOTtOM un' I/2'MIn.Rod, ris N0. t CONC. FLOW FLOW ~ a Q ° f ORGANIC LAYER OR MULCH tL ~ THE ORGANIC LAYER PROVIDES A MEDIUM FOR BIOLOGICAL GROWTH AND ~ FlED STANDARD TIER V CURB AND GU DECOMPOSI110N OF ORGANIC MATERIAL. THE ORGANIC OR MULCH LAYER ON THE NOT TO SCA ~ ~ LE SURFACE OF THE SOIL HAS SEVERAL PHYSICAL AND BIOLOGICAL FUNCTIONS. THE SURFACE LAYER ACTS AS A FILTER FOR POLLUTANTS IN THE RUNOFF AND PROTECTS Q tp NOTE: THIS CURB AND GUTTER SYSTEM IS TO BE - • . NOT TO SCALE THE SOIL FROM DRYING AND ERODING AND SIMULATES THE LEAF LITTER IN A FORST cv USED IN THE BIO-RETENTION A REAS ONLY COMMUNITY. THE ORGANIC OR MULCH LAYER PROVIDES AN ENVIRONMENT FOR ~ Q SECTION 9.8 MICROORGANISMS TO DEGRADE PETROLEUM-BASED SOLVENTS AND OTHER POLLUTANTS. n. n ~ U p MAX, PONDED WATER Z ~ N Li o GROUND COVER OR DEPTH (6 INCHES) ~ .,AND BED MULCH LAYER - Q ~ ~ THE SAND BED IS LOCATED AT THE BOTTOM OF THE BIORETEN110N AREA. IT PROM ES w 3:1 MAX. ~ URB D 1 c+°~ ~ G r (TYp,) FOR DRAINAGE AND AERATION OF THE PLANTING SOIL, AND AUGMENTS THE ABILITY OF ~ J a : ~ 3 A ~ \ FLOW FLOW THE BIORETEN110N AREA TO DRAIN THE RUNOFF IT RECEIVES. _ - THE SAND SHALL BE FREE OF DELETERIOUS MATERIAL AND ROCKS GREATER THAN 1 I,uulluulll 91ao<(op i = , ROPOSED GRADE - - _ - . . ~ INCH IN DIAMETER. SAND SHALL BE ASTM STD C-33 CONCRETE SAND. '°I "<<~~~ii~~ 00400 ~ Tablo d.3 RECOMMENDED PLANT SPECIES FUR USE IN BIORETENTION -SHRUB SPECIES Specie Moisdue R me Tolerance ~ M0~010A` (knnal ISOMETRIC Characteiiatia Sci NaNU Lsditwta Habitat Pondiag Salt Oill Meals ]nsaxs 8xpoaun Form Hefght Root Native WUdlife -_-_-PLANTING SOIL:-_-_-_- ~ S~ ~ ~N= _ ~p Common Name Stanra Orwe 8 PLANTING SOIL =off ~z°~= &r6nis konemrs FAC Mantic 2.4 H H H M Sna to partial Oval ahrob 4•ti' Shallow No Low •.,•+~..;.,+•,jyq•~~~,!1', .h ' ~q`y1,;7+,~,,,,,;,,,,,;,~.. 6 1/4 PEA GRAVEL THE PLANTING SOIL IS THE REGION WHICH PROVIDES THE SOURCE OF WATER AND ;r °°d Shade ' 1 Beri6arla thrwbrrgtl FAC Maic 2.4 H H M M Sun Rounded, S•?' ,ihallow No Med. ,;x,~'.;•,v.' • oe,Nrl• ~ +,wn~ti;•,'~k „;.a:grr~ `r ~ ~ NUTRIENTS FOR THE PLANTS TO SUSTAIN GROWTH. THE VOIDS IN THE SOIL ALSO ~ • o` PROVIDE FOR STORMWATER STORAGE. CLAY PAR11C ~ Japaoae Barbary Brad, dame 00000°000000°000 000°o LESTHATCOMPOSEAPORIIONOF ~ 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 /~~~~1111111111111111t111``` aluab N.T.S. Ctrrhro aieifolia FAC Maic to 2.4 H H Sun to partial Ovoid efwb 612' Shallow Ya Med. ° ° ° ° THE SOIL ADSORB HEAVY METALS, NUTRIENTS, HYDROCARBONS, AND OTHER 0 0 0 0 0 0 0 0 0 0 0 sweet wet maic Shade 6" PERFORATED X57 STONE POLLUTANTS. Canes Sroloaifrm FACW Maic ~ 2.4 H H H M Sea a Shade Ardting, 8-10' Shallow Ya Rd Qakt ~ PVC PIPES ~ Euorrywurs slates FAC Mesic 1.2 H H H M Sea a shade Plat, dome, S•7' Shallow No No PLANT MA BIORETENTION AREA SAL ° aumymtws hotimnal Euonynws ruroparus FAC Mesic I-2 M M M M Sun m partial Upright dame 10.12' Shallow No No THE ROLE OF PLANT SPECIES IN THE BIORETEN110N CONCEPT IS TO USE NUTRIENTS AND OTHER POLLUTANTS AND TO REMOVE WATER THROUGH EVAPOTRANSPIRAl10N. A ~ shade ovd thntb FOREST COMMUNITY STRUCTURE IS REPLICATED TO AVOID MONO U R Namaaulrs vlrgiaia FAC Maic 2.4 M M M M San a Shade Vase•Woe 4.6' Shallow Ya Low wltch•hasxl NOT C LTU E SUSCEPTIBILITY TO SCALE TO INSECT AND DISEASE INFESTATION AND TO CREATE A MICROCLIMATE WHICH IS N~x?kwn dhssj~onun FAC Manic 2.4 H M M H Sun Ovoid Slpab . Sari' Shallow Ya Med RESISTANT TO THE STRESSES TO WHICH LANDSCAPED AREAS IN URBAN AREAS ARE w®mon St. Iohn'a wort 1(rx gla6ra FACW Maic to 2~t L M - H Sw to 'al 612' Slullow Yes Hi SUBJECTED, INCLUDING HEAT AND DRYING WINDS• wet Maic ~ ~ nun shrub ilex vrrtieillme FACW Mesic to 2.4 L M H Sun to peN•I Spnading 612' S7ullow Ya High N.T.S. wet Mesic suo shnsd Juniperus comnuaris FAC Qry Maic 1-2 M H H M-H Sun Mounded b 3.6' Deep No High "ranrrssa" to Mesic ~ taproot GENERAL GUIDELINES comma lunlprnu horftoorasps FAC Dry Ma'tc I.2 M H H M•H Sun Matted airob 43' Dap Na High "bar Harbor" to Maic taproot MINIMUM SIZE: Z 0 THE FOLLOWING DIMENSIONS ARE RECOMMENDED FOR BIORETENTION AREAS: Ltadrm brntnin FACW Maic to 2-4 H H Snn Upright 6 612' Deep Yes High cebush wet Meaic W My»ca pennsylvattca FAC Mesic 2.4 H M M H Stm to partial Roond~d, 6.8' Rhdlow Yes High - AVERAGE WIDTH OF A FUNCTIONAL BIORETENTION AREA SHOULD BE 15 FEET. ° b. ~ A WIDTH OF 25 FEET IS PREFERABLE. I - AVERAGE LENGTH SHOULD BE 40 FEET. FOR WIDTHS EQUAL OR GREATER o shrub PMysorarpNS opNl~fiw FAC Dry Maic 2.4 M H Sun Upright shrub tt12' Shallow Yes Med THAN 20 FEET, THE LENGTH OF THE BIORETENTION AREA SHOULD BE AT Z mnebark to wet LEAST TWICE THE WIDTH. Mesic Vl~rnwN cau&+oidcs FACW Maic 2.4 H H H H Sun to partial Rounded, 68' Shdlow Yes Ht - THE PONDED AREA SHOULD HAVE A MAXIMUM DEPTH OF 6 INCHES. ~ Bh northern wild raisin snn . shrub • - THE PLANTING SOIL SHOULD HAVE A MINIMUM DEPTH OF 4 FEET. Q Vtbaraam dmuam FAC Man; 2.4 H H H H Sea ropmtial Uptight, multi- 8.10' Shadow Ya High arrow-wood tam t~hrub BIORETENTION AREAS WILL BE LIMITED TO DRAINAGE AREAS LESS THAN Nf6ornom Ie+aago FAC Mesic 2.4 H H H H Son to pntiet Upright, multi- 1.10' Shadow Ya High 5 ACRES IN SIZE. ~ a~ am stemmed shrub a Q s ° THE SIZE OF THE BIORETEN110N AREAS SHOULD BE 5% (WITH SAND BED) TO 1% ° » » N (WITHOUT SAND BED) OF THE DRAINAGE AREA MULTIPLIED BY THE RATIONAL C U ° Tablt: 4.4 RECOb~NDED PLANT SPBCI6S POR USE IN BIORET6NIION TREE SPBCD3S Specks MahquR Ragioe lbkraatoe Getaeral COEFFlCIENT. Z w ~ M ~ ~ N Maphoiogy W ~ ~ O~ BI ON ~1 Sdau(flc NaNie htdiaeor Habieg Foadigg silt all Meat Lnaxs Eapotaue Form Heigh Ron Name wihBiR ON~1 ~-~3 a Z=W° Z W ~ ° NUMBER AND SIZE OF PLANT SPEgES: Z ° ~ ~ Q ° enmama Name Saga (bane s Aar ralbraae PAC Mastic • 4.6 N H H H P•Mkl Sna S' m mnlti• 30.90' Shallow Ya Hi U W a~~in Z J Z~Nn 1 ~ gh rod H tlem tree A MINIMUM OF THREE SPECIES OF TREES AND THREE SPECIES OF SHRUBS SHOULD BE Z a Qz I I O Q oo I I SELECTED TO INSURE DIVERSITY. HERBACEOUS GROUND COVERS ARE IMPORTANT TO W ~ w ~ ~ ° ~ V U _M M I Amrlaneh&r amtadrnris FAC Mesic 2.4 H M H Parthll Sun Single m multi- 30.50' Shabw Ya Hi Bh PREVENT EROSION OF THE MU H N w ptOtD Z ~ z ~°00D ] LC A D THE SOIL LAYERS. o ~ Q h atemtra &ndo •tgro FACW Maic to 4.6 - M M H Pattie! Sun Single amulti- SOTS' Shallow Ya Mad = L~~r7~ V OZMM ~Q~rn c~lWOo rivabdrch H samtroe ~ 5 ~ W,_,,., cn ~°w THE NUMBER OF TREE AND SHRUB PLANTINGS MAY VARY, ESPECIALLY IN AREAS WHERE BerNl•papuUJblia FAC Xaic• 4•G H H M H Partial Sun Single b mu16• 35-SO' Shallow Ya Hi Sh badt ddc parr tin to AESTHETICS AND VISIBILITY ARE VITAL TO SITE DEVELOPMENT AND SHOULD BE Frtuinus afirrktuw FAC Mesic 2~l M H H H Suo Large tree SO.80' Deep Yes Low DETERMINED ON AN INDIVIDUAL BASIS• ON AVERAGE, 1,000 TREES AND SHRUBS white ~ 0 Prasinus pawylvmiim PACW Maic 46 M H H H Faatid Sun Large tra /0•ti!' Shallow Ya Low p SHOULD BE PLANTED PER ACRE. TWO TO THREE SHRUBS SHOULD BE SPECIFIED FOR O ash M 0 EACH TREE (2:1 TO 3:1 RATlO OF SHRUBS TO TREES). Glnkao611oba FAC Maic 2~4 H H H H Sun Largetra SWO' ~dbw No Low ar`~ ;fir ~ , AT INSTALLA110N, TREES SHOULD BE 2.5 INCHES IN CALIPER, AND SHRUBS 3 TO 4 0 °o w, ~ o Maidenhair tree to • Gkdltsia uiacmrtiws FAC Maic 2.4 H M M Suo Small eattopkd SOTS' IlMlbw You Low FEET IN HEIGHT OR 18 TO 24 INCHES IN SPREAD. GROUND COVER MAY BE AS SEED M honeybatst hxgetaee p~ 0 OR PREFERABLY PLUGS. THE RELATIVELY M ~ M ~ ° ATURE SIZE REQUIREMENTS FOR TREES _ ~ Q ~ ltadprxs vbgleiae• PACU Maic • 2~ H H H Stm Detue 30.75' T~aoot Yes V AND SHRUBS ARE IMPORTANT TO ENSURE THAT 1HE INSTALLAl10N OF PLANTS ARE N ~ ~ ~ .z ~ o Z ~ ~ eastern tad txdn xate tttrto sae I r READILY CONTRIBUTING TO THE BIORETEN110N PROCESS (I.E., EVAPOTRANSPIRATION, N ' ¢ Q I- O o~ [orlnoUrbpnicwiare PACU Meek 2.4 H H H H Sim Round, thnae 2430' Sfulbw No No ° ~ ' w L°'` ~ POLLUTANT UPTAKE). ~ shade tree I Ugaf/wtbar sry?ac~laa PAC Meek 1.6 H H H M Sea Large tra 3470' Deep Yea ~ High 0 4 . x Z Y~ x a ¢ ~ ' ~ vi a ~ e' Z ~JO.- ~ 'JOO eweetbum Nyssa sylvatica FACW Maic • 4•ti H H H H San Large tree 4410' Shallow Ya black H 'c ~ 8~ y~ to dap ° ' ~ Table 4.6 Recommended Tice and Shrub S cin U ~ ~ m z z o°o l..o ;~.7C,: ~ ZOO) = OJ OCO f~ i t I N W~ Q C1 ~Or;r; ~ J~ I '~1 - °z~""'~ Q a ~w~~ Trx Spacing 51uub Spacing Total Density Z ~ ~ o e ~ N N i Plrrrarras aarjolm PACW Mesic 2d H - M Sun Large tree 70.10' Shallow No Low ~ Loadan ~ n : ~ feet felt stemslacre °o ~ W Rasmus acckknraiis FACW Maio - 44 M M M M Sun Large tree 704W Shallow Yes Med F 's r Maximum 19 12 40U a M ~w F o N mw syc=rC H ' P dskoUa FAC Xeric • 44 N H H L Sun tee with 75- Shallow 1. Yes- I High A Law eastern cottonwood Mock Spreading loo' r A e 12 8 1U00 r $r Minimum i 1 7 1250 breeches 0 Pyres a dkrymm FAC Mesic 2.4 H H H H Sun Dense shade 30-SW Shallow No Low l _ Callerypear. Q nee J Qranarr bkolo FACW Mesic to 44 H H H Sum to partial [age tra 75• Shallow Yes FUO a CONSTRUCTION OF BIORETENTION AREAS SHALL BE IN CONFORMANCE WITH THE NORTH white oak wet mesic sum 100' Qwerm owelnea FAC mesic 1.2 H M M M Sun Large tee 50.75' Shallow Yes High t g" D CAROLINA STORMWATER BEST MANAGEMENT PRACTICES HANDBOOK (APRIL 1999). SEE o o CHAPTER 4 FOR FURTHER DETAILS AND SPECIFICATIONS. scarlet oak m 0 0 uj Qaercus macroca" PAC mesic to 24 H H H M San Large 75• Taproot No Hi but oak wet mesic a ~~1 spreadha tree t Qre o p korla FACW Mesic• 4.6 H H H M Sun Lugo tree 60 0' Shallow Yes High Pin oak Hydric to deep Qwnwphellos FACW Moak to 46 H H Sun Large nee 55.75' Shallow Yes High W a C / willow oak wet mesic Qaereas rmbru FAC Mesic 2-4 M H M M Sun to partial Large p tree 60.10' Dee- Ya Hi erm gh spreading r gh Table 4S RECOMMENDED PLANT SPECIES FOR USE IN BIORETEI~TION - BMACEOUS GROUND COVER Species Moisture BI gim Tolerance Mme, General OR > D J Z Characteristics ScinaificName Indiator Habitat Padding salt Oil/ Metals Insects Exposure Form Height Root Native Wildlife Common Naas Statue (base System Lu cc Agrosrisalba FAC Maic• 1.2 H H H Shade arse fR betous Yes High w ui re" Xeric Shallow Andropegan gemrW FAC Dry Mesic 1.2 Sun Oran 2-3' Fiberous Yea M int . mesic SiaBow Derchanrpala caespilosa FACW mesic to 2.4 H H H sun tines 2.3' Fibaous Yes Med. Wed hairgrass wet mesic Shallow LL. Hidna HeUx FACU mesic 1-2 - H Stn Evergrormd Flberous No Low ED" I cover Shallow later Cornkwlatus PAC mesic - 1.2 H L H H sun tines 2.3' Fiberaa Yes High birdsfoot•tefoii Xetic Sallow Pachyradro rerminalis FACU mesic 1.2 M Shade Evergreen Fiberous No law cover shallow Panlarm vrronm FAC to Mesic 2.4 H - LH Sun or Shade Ores 45' Flbemos Yes High switch s FACU Shallow ii i a fasru FACU Mesic 1•2 - - Shade Evergrart Piberoua No ~ ~ Mempida ground cover shallow Boston Ivy Moo mWor FACU mesic 1.2 Shade Evergreen l4berous No Low F~ co lame winkle zround cove Shallow Vince minor FACU mesic 1.2 Shade Evergreen Fiberoas No Low ui 0 z common Periwinkle srowd cover Shallow W J OVER any OVERALL AREA MAP SCALE: 1"=200' File No, NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001BMP2 XREF: DRAINAGE PLAN STATE/03001BASE SHEET. D8 OF D20 i i ~ ~ BIORETEN110N SIZING COMPUTATIONS H 0 U U, DRAINAGE AREA A * C-FACTOR * 5~ (WITH SAND BED) U = z ~ =SIZE OF BIORETENTION AREA U Q 4 Y Q 1.37 AC * 0.85 ~ 0.05 = 0.058 AC. = 2,536 SF W a. W W W W ~ a 3 Q W U p D i,_ W W W W 0 N / W W N M W W BIORETEN110N PLANTING COVER COMPUTATIONS Q ' BIORETENTION AREA #1 = 2,536 SF = 0.058 AC. W Z Z ~f $ 4 WIDE OPENING 4 W PLANTING REQUIREMENT = 1,000 PLANTINGS AC. IN CURB (TYP.) / Z ~ W TOTAL PLANTINGS REQUIRED = 58 PLANTINGS S W TOTAL P AN - ~ W L TINGS PROVIDED - 58 SHRUBS /TREES a. I W W ¦ ~ V b y ~ ~ M ,h O ~ ~ ° M O W .y _ ~ ~ U N N .y ~ ~ W W O W W Q . ~ n ~ s Q W i W y ~ 3" OF 12 MONTHS AGED MULCH W 6 PONDED ~ o 0 P D W ~ WATER DEPTH PROP. CURB LL ~ RB O W f W 4r - TOP EL.=747.80 - ~ n F BOTTOM EL.=747.30 - - - ~I W III - - - :`I_ 3:1 SLOPE W .y _ - - W III-1 ____---III W III - ___,~I, t Q o---o ~o W W - _-~.-.PLANTING SOIL- ~-}--o ~ , I p~~ N W ~ ~I~ , _ _ I~ 0-~ Q ~ W ~II =--_-_--,'I~II~ nn ~ 0. ~g _ ~ ~i ; • , r.. I 6 1 /4 PEA GRAVEL JEL ~ o z ~ W - - 'a''~~ 1 MIN. SAND BED ~'"~u~i (USE ASTM C 33 ,,.t~,~' I W .y r +f....~.i ~i~w.wr`L.1i N'.' V N ~i o a d--, O N CONC. SAND) .8 W to B -747.30 W W W a oooaaoaooooo o Lii J W 0 0 0 0 0 0 0 N 1 W W YA INLET THROAT = 148.50 V N 4g 0 F EMERGENCY OVERFLOW 14.0 AVG. " ~ 6 PERFORATED 9 ~ W W #57 STONE PVC PIPE (SEE PLAN i W W 28.0 AVG. VIEW FOR INVERTS} W y 1 ~u?nuunnruurun / p~iq~~ W W W ?7 ~ ~~~i W W SECTION A-A W W W W N.T.J. W W W ~ ° °o N W W W W y y W W W =~i J~ ° c 2 ey n ~ e W W W W W W cVe ~ ~ etc oW O e° ~ W W W W 6" PONDED .y o~ o~: °0 `C- W ~ W W WATER DEPTH 3" OF 12 MONTHS AGED MULCH W ~ W ~s W 0 W W _ iprrrrUra pn"``~~`` W W W I l l-~ - nnuuum 5 W W W W Z _ T P .=7 lull III_11'~ 0 - 0 EL 47.80 ~ _ , W W y _ i I--I ~ _ III„III W W W y W y BOTTOM EL.=747.30 1 I I _ _ _ _ _ _ , ; _ _ _ _ , ~ -I 11= 11=Ix ._:_•_~~.:=:-_::___:.:_:_:__f_:.;_::_'1=- ~ 3:1 SLOPE n ~ SCALE: 1 =500 0 y W W W W W y 111-) _ _ _ . ~I I W W W =iii~'~-~_~:_-;=_,4' MIN. ,~~1-~ W W W W W , ~ I-1 III-L- PLANTING SOILS W W J• ~-1 I II _ ~ , _ _ - _ _ _ _ ~ i~l i F- ~ W _Ili-1 _ -_-;111-__II W y I _ _ _ _ _ _ _ _ . I^I I I • ~ : ; 6 i/4 PEA GRAVEL VEL c) ,:;,.L.. ~ ~1 MIN. SAND BED,~Y,. ` , MIN. 9 gg,p' 6" PERFORATED ORATED PVC PIPE #57 STONE 'E „ SECTION B-B SCALE: 1 =10 N.T.S. 0 a BIORETENTION FILTER DRAINAGE SYSTEM CONFIGURATION w p SCALE: AS SHOWN d z W W W W m W W W W .:Y g W y W BIORETEWTION SIZING COMPUTATIONS W W W BIORETEN110N SIZING COMPUTATIONS Q ' ° ° + W W W DRAINAGE AREA A * -F * C ACTOR 5~ (WITH SAND BED) W W W I * - ~ N DRA NAGE AREA A C FACTOR 5~ (WITH SAND BED) ° W W =SIZE OF BIORETENTION AREA W W W U ~ ~ =SIZE OF BIORETENTION AREA Z ~ ~o W W W 0.85 AC ~ 0.85 * 0.05 = 0.036 AC. = 1,574 SF V ~ NN W W W W 1.06 AC ~ 0.85 ~ 0.05 = 0.045 AC. = 1,962 SF ~ w~ x ~L x '7~j~3 Q Zw0 X W W W z w ~ p ~za0pp Z ~~cDr) )M W W W a ~ W co co W cwa~~n Z J ?~N~ )(O >r- Jt- W W W of W •Y ZaQZII Oa°olI W U ~a~wa^o V v 1 A N >M W W W V> WOcocD ~ ~~a0o0 )00 v-~ W W W BIORETENTION PLANTING COVER COMPUTATIONS Z ~~~M Q V o~M~ ~a~~ 3 ~ N,ZOMO BIORETENTION PLANTING COVER COMPUTAl10NS g .-w..,~ w ~p..~ >M >O > M W W W 4 WIDE OPENING W W W 6 IN URB (TYP.) BIORETENTION AREA #2 = 1,574 SF = 0.036 AC. W W W CENTERED PLANTING RE UIREMENT = 1000 PLANTINGS AC. BIORETENTION AREA #3 = 2,038 SF = 0.047 AC. W ~L W Q ~ / W W W ON ENT STRIPE TOTAL PLANTINGS REQUIRED = 36 PLANTINGS W W PLANTING REQUIREMENT = 1,000 PLANTINGS/AC. y TOTAL PLANTINGS REQUIRED = 47 PLANTINGS W W W TOTAL PLANTINGS PROVIDED = 36 Sk{R.U?c / TR«S TOTA+~ PLANTIP~GS PROVIDED = 47 SHRUBS /TREES a W .Y W W W W W W ° ° W M W W W ° ° W W W F-~ W W W ~ ~ ~ N '~V a. W W W W •Z ~ Q Q ~Y ~Y 1 Q n ~ ~ O O W W W 6" PONDED 3" OF 12 MONTHS AGED MULCH W W WATER DEPTH PROP. CURB 0 4 WIDE OPENING 6 PONDED 3 OF 12 MONTHS AGED MULCH I- U 6 IN CURB TYP. U z ~ w WATER DEPTH /PROP. CURB ~ x Y ~ x X W W W y O ? W a Z a~ W / F-- J ~ Q J Q W 0 y - TOP EL.=767.50 - _ ° co ~ o ~ O 7 O _ _ TOP EL.=762.60 _ W ® W W W W W W -I I - ~ W BOTTOM EL.=767.00 -+!I_il. = ------_----_'~I_' - Q °~MM ~ '-W~~ D LO 1 I W a W BOTTOM EL.=762.10 ~ I - 1 _ 3:1 SLOPE _ - - - - - - - _ 3:1 SLOPE L~ - - _ _ _ _ ~ ZZf~(~ L QLL.NN 00 7Lo ~4 N ~fl - =,:'=:4' MIN._==~ - _ : t~ o~oo~ W °°o °o OD ~t- W W ~ o y ~ 'I -=--PLANTING SOIL=',-~ L- Fn- V CV y -I~~ III - T_II W W W 63 r.. r... = II _''11=_T y y y w ~ I _ X !VIA I if .,?r , n . run: i 1- » 6 4 y 1/411 PEA GRAVEL 4» PEA GRAVEL W W MIN. SAND BED'.r•,,: I (USE ASTM C-33 G W y o y (USE ASTM C-33 _ x1 MIN. SAND BE 'A:0. ^'i."'+•~. bn? .'l. •>I•:rh,t'.5,1, SAND) r ~o CONC. SAND) w W Q V W W y 0000 0 0 000 i 4=0 0000000000 0 cV J w W y w 0 00000000000 0 000000 O N x W W w w W u w 6.0' 6 PERFORATED y 18.0' » 6 PERFORATED z ui 0 #57 STONE PVC PIPE (SEE PLAN a. r W w o W #57 STONE PVC PIPE SEE PLAN w co [DB E N 3 31.0 VIEW FOR INVERTS) w BIORETENTION #2 15.0 AVG. w VIEW FOR INVERTS) w W a y TOP=762.60 TOP=767.5 I I I i C y w W w BOTTOM-762,10 W BOTTOM=7 .00 W SECTION E-E SECTION C-C W W ^ W ,l N.T.S. \ W y ; W N.T.S. W i W W W ma imm W W W W y W y » r y y 6" PONDED „ 6 PONDED » ~ WATER DEPTH 3 OF 12 MONTHS AGED MULCH W W 6 WATER DEPTH 3 OF 12 MONTHS AGED MULCH NMI 'EL > .J w W y I W W Z W W _ I=_ II-`I 6 TOP EL.=762.60 `t=I11=1~1-I1 W TOP EL.=767.50 X y w BOTTOM EL.=762.10 111 -III 77 1:7-12 -3:1 SLOPE BOTTOM EL.-767.00 I I-! I f - . 3:1 SLOPE L W W W - i~ 7. 71 7. W W .11 . ""''24 , = III- 4A y W =III = -_=._':4' MIN.. :_=_•`-I W W w w -=PLANTIN .I MIN. _ .III -PLANTING SOIL=- - x=111 _ _ _ G SOIL_..___,_ W w YARD INLET THROAT 762.80 .III-1 - - - ` - -I I~ - - III LL. = _ ll w FOR EMERGENCY OVERFLOW ; - 7. - ~I I -III II 0 6" 1/4" PEA GRAVEL YARD INLET THROAT = 1 6 1 /4 PEA GRAVEL 00 MIN, SAND BEDy 1 MIN. SAND BED - MIN. 9 FOR EMERGENCY OVERFLO ..46 , 606 - T f ~p q,. MIN. 9» W W \ _._.._.._._-.j w w w W W 0 n n -,j MOP I i ATED 1 66.0 6 PERFORATED y y y 115.0' 6" PERFORATED y PVC PIPE PVC PIPE #57 STONE--///~ w W #57 STONE m W W y SECTION D-D SECTION F-F w w w y w N.T.S. W W W N.T.S. Z W 1 BIORETENTION FILTER DRAINAGE SYSTEM CONFIGURATION BIORETFN110N FILTER DRAINAGE SYSTEM CONFIGURATION 0 z BIORETENTION #3 J 1 SCALE: AS SHOWN BIORETENTION #2 SCALE: AS SHOWN SCALE: 1"=10' W 1 SCALE: 1"=10' File No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001BMP2 XREF: DRAINAGE PLAN STATE/03001BASE SHEET: D9 OF D20 ./~i ra ~ ~ ~ ~ ~ - ~ ~ U, U - ~ P z s ~ 0 _ h ~ U ~ \ ~ F. \ c ~ / ~ \ ~ a 'r / ~ \ _ ~ ® ~ ~ , F-1--1 0 S Q 0 a----+ 5 I / X 53 o---t-~ p ~ C a--f-d P ~4 Z o P \ ~ 0--d N / F ~ N F ~ ~ _ I ,Q .Q g 6 / ~ ~G~ ~ z 1 ~ a ~ r I, a".1 4' WIDE OPEI 5 a 4 WIDE OPENING 53]. ; ~ H--4 IN CURB (TY ~ TO BE CENTI IN CURB IYP. P`"'~ ~ ~ 5 TO BE CENTS / ON PAVEMEN ~ v ON PAVEMENT STRIPE p. ~I..o ~ • TOP=152.60 ~ wk's 80TTOM=752.10 A~ / ~ 5 p M / / ~ \ G~ i N N N i1J 0 ~ r ~W • Q? p a Q 4 WIDE ENING P \ Q o D 56Q TYP. tL ~ IN CURB ) 56Q F - 0• ~Q 0 lL Q~ Q~ • TOP=754.80 0 OM=754.30 8 TT 'l 5 ~G Q ~ r ~ ~ y ~o ~ ~ r,0 ~ ~ N ~ o 0' ~ Z Q ~ LI1 ~ ~ ~ ~ P ~ ~ ~ ~ SCALE: 1 -500 ~ ~ 0 0 ~ ~ z ~ 57 'Q 57 _ U N o C) O N N Q i / ~ h TOP=756.70 / BOTTOM=756.20 fOP=756.70 30TTOM=756.20 J Li.l J ~j P ~ t~` Q U N ~ •g ~ ~ 591 F 6 0 • 6 y y N1111IIIIIrOppr4pri 59~ ' i~ y y °°°000 ~ 59 ° epee y ~ v ee7~ .y h 0' y . ~e M °oN ® TOP= 8.70 y ' ~ s°~ J r- ~0 = .V ~yJO Q~' - ~ , 0~ 0 BOTTOM- 58.20 Q 61Q s y-' °eW O 0 G~ y s o~ o° 4' WI OPENING y ~!~°°vy vo° J 6' ~ IN CUR TYP.) y /y \ G J TO BE CE RED „v~:~ 1 I P _ ON PAVEME STRIP rrr+nunmm~n~ y •V / d~ ~ i TOP-7so.so ~ 1 s1 BOTTOM=760.10 ~ .V .V y J. ~Y ~ ~ ~ Q y y Q 6\ ~ y y ~ \ y y y 6' ~ ~ ~ 9 19 y y •Y 0.' s2- y y J' y y y y ~ ~ ~ t. / o• \ 0 ~ \ y .V •V ~ / ~ \ y y y y Q ~ ~ 7 Q~ 3- 1 s3 p~ y y 'i y y y y G y .V oA10 y y 0 0 \ ~Y J 'V / ~ ~ TOP=76250 \ BOTTOM=76200 y y ~ y y y y y / ~ \ / s P G ~ y `Y y W y `Y c~ \ / ~ F y J~ y ~Q \ y y y Z .V y G y y O / 4 W~DE 0 ENING 6 655 86 IN CUR TYP, .V y Q. i y / ~ D 4 OPENING TO BE TER y J' y y N / ON PAVEM NT STRIPE IN CURB ~(TYP.) 4 / ` 64 \ .V ,V y y ~ W y y y ~ ~ y W y O .tp' 1 ' .V .V y y .V 0 O y y ~ 1 / ~ TOP=764. y y y y y 655 BOTTOM=7s 90 ~ / ~ y y ~ .?r. y Z 6 ~ 'Tz., ~n~ ~T~j,, y y y y y y / -788' ~ ss- .V y y y y / \ .V .Y .V VI \ Q ¢t lx y y y yTOP~759.60 674 . / ~ ~ / \ 3 y y y y y BT)TTOM=759.10 Q y y y .V / \ ~ ~ J o• \ W y y y y ~ ~ ~ ~ TOP=76 20 \ •~o Q~ BOTTOM= 65.70 J' •Y y y' y ~ 68 s7 P y 'V y ~ M y y y DD O / ~o G F y y y ~Y y Q O t~~ \ f Q y y y ~ O y y ( 1 y y y y Z W ~M ~ ~ O \ y y y U ~ NN y y y y. y ~ W-W] x ~ f-~ X ~ Z~wo X Q 6 y y y y ~ ~ V ZW /y W • y y 11 1 ~yJ Z OO OO ~ z ~ a CO M v./~1 1.1.1 ~ > ~ln ~ W 4' (O CD Li D M • Q V y y y U a W OD Z Z O f0 L!") O CD D ~1") V f~ - TOP-768. y J~ y Z a QZtnln O~ OONI \ y y y W Q ~a~^ N U U _MM I I N N BOTTOM-7 7.50 695 y y y YARD INLET IHROAT = 759.80 Vvi W o ~ ~ Z ~ ~ ~~J c M coo ` \ y `Y y FOR EMERGENCY OVERFLOW ~ 4z 'L d ~ ~ 3 ~°v W o 0 D M Y~ ~ O '7 M 71 \ ~ ~ y J ~W ~ vi ~O~ti \ / ~ V 71 10Z ~ ~ ~ 6' ~ ~ ' G ~ 4 WIDE OPENIN IN CURB (TYP.) 72 \ \ o WMI TO BE CENTERED 5TOP=769.70 - mod' FM ~ SCALE: 1'~ 10' M _ ° 11 BOTTOM=769.20 T STRIPE ~ ~ ON PAVEMEN Q ~ ~ .z ; Q a ~ a ~ o" H 13 , • 4' WIDE OP ~ U U X IN CURB TYP. \ ( ) _ \ n X Z Y~ x 3 OF 12 MONTHS AGED MULCH a a _ 6 PONDED ~ ~ ~ Q J J Q . Li 6 6' BIORETENTION SIZING COMPUTATIONS WATER DEPTH PROP. CURB = ~ ~ ~ ~ ca ~ $ O O O cn O N ' BIORETENTI ~7 _ ~ / o a~ o <o ~ \ ~~~zi i ~~jJOi i _ o: O J CAD I- I I TOP-771.80 - =771 ~ DRAINAGE AREA A C-FACTOR « 5% (WITH SAND BED) _ TOP EL.-759.60 -I _ ~C (v~ o a a N W _ _I-~ _ ~ III =i ~ F~ Z Z I~ I~ ~ O a L~ N N - . = co Ul Lr) N N / eorroM =SIZE OF BIORETENTION AREA _ _ _ 111-;~ , _ _ _ _ _ _ _ _ _ , I i ~ o W W o-~-, B'ST10M EL. 759.10 i ~I, - _ - 3:1 SLOPE ~ o~ ~ 0000 ~A ` • \ ~ 6 0.73 AC * 0.85 * 0.05 = 0.031 AC. = 1,351 SF u-C4 C14 F o NmCN N N =11f =:4' MIN.=:- ! -._-PLANTING SOIL= 1 -III- - - - - - - i l O~p 6 1/4' PEA GRAVEL USE ASTM C-33 - 1 MIN. SAND J CONC. SAND ~-T 3 BIORETENTION PLANTING COVER COMPUTATIONS o 0 0o o o a o o 0 0 0 o a= 0 a o o c a o cv T10N AREA #8 = 1,541 SF = 0.035 AC. LLJ 0 BIORETEN PLANTING REQUIREMENT = 1,000 PLANTINGS/AC. 6.0 6" PERFORATED = 5 PLANTINGS #57 STONE PVC PIPE (SEE PLAN TOTAL PLANTINGS REQUIRED 3 15.0 AVG. TS) TOTAL PLANTINGS PROVIDED - 35 SHRUBS TREES VIEW FOR INVER / - SECTION 0-0 W N.T.S. I m BIORETENTION #7 SCALE: 1"=20' 6" PONDED J WATER DEPTH 3 OF 12 MONTHS AGED MULCH 6" PONDED 3" OF 12 MONTHS AGED MULCH 6" PONDED WATER DEPTH PROP. CURB WATER DEPTH 3" OF 12 MONTH EL.=759.60 - I I OF 12 MONTHS AGED MULCH TOP _ - ..III-{ I ~ Z BIORETENTION SIZING COMPUTATIONS X", ~fl_ BOTTOM EL.-759.10 11=1 I I = _ - = _ - 3:1 SLOPE TOP EL.=VARIES TOP EL.=VARIES DRAINAGE AREA A C_FACTOR 5% (WITH SAND BED) [TOP EL =VARIES :L.=VARIES - = SIZE OF BIORETENTION AREA BOTTOM EL.=VARIES I I_f I - - - - - 3.1 SLOPE BOTTOM EL.=VARIES ! TOP EL.=VARIES 4 MIN. . _ II=1 - _ _,111=111: V. PLANTING SOIL_::_' r - O 1.96 AC 0.85 0.05 = 0.083 AC. = 3,629 SF II- 4 MIN..-~ . 111,111 111111 HIE (E r- - i PLANTING SOIL_ El 1 IN.-- - _ - 3:1 SLOPE - 6 1/4 PEA GRAVEL 1/4" PEA GRAVEL L) _7 7 =LC=1: . ill= III-I ' PLANTING SOIL=- _ . _.._.._.,_~IJ-I G SOIL - - . _ X11 ,1MIN. SAND BED; ..t........, " 7~ 7- 7 MIN. 9" - Lq =ii 6 1/4" PEA GRAVEL - USE ASTM C-33 - 1 MIN. SAND"BED;,,;>;,':'! ~Ill~ = rte r s~° I 6 1 /4 PEA GRAVEL -11 1 MIN. SAND BE BIORETENTION PLANTING COVER COMPUTATIONS CONC. SAND} - - AND „ D o a o 0 0 o i--- - 6" PERFORATED 112.0 co IN= #57 STONE PVC PIPE uJ o z R TENTION AREA 7 = 3,842 SF = 0.088 AC. BIO E # ° o°o°a°o°o°o° o iv PLANTING REQUIREMENT = 1,000 PLANTINGS/AC. TOTAL PLANTINGS REQUIRED = 88 PLANTINGS 5.0 6 PERFORATED TOT , AL PLANTINGS PROVIDED = 88 SHRUBS / TREES #57 STONE PVC PIPE (SEE PLAN 38.0 6" PERFORATED PVC PIPE SECTION P-P W 3.0 N.T.S. J W 10.0 AVG. VIEW FOR INVERTS) 57 STONE J SECTION N-N f 11 0 z ION N-N CTYPJ SECTION M-M CrYP.) I.T.S SIORETENTION FILTER DRAINAGE SYSTEM CONFIGURATION . V N.T.S N.T.S. N.T.S. SCALE: AS SHOWN W W 1310RETEN7I0N FILTER DRAINAGE SYSTEM CONFIGURATION SCALE: AS SHOWN SHEET: D11OF D20 D20 File No. NC Tax Map No. Job No. 03-001 Cadd Dw9. File: DRAINAGE/03001BMP2 XREF: DRAINAGE PLAN STATE/03001BASE U ~ U U ~ 2 Z p U a Q Y w Q Q U ~ o q m z O 0 ~~.:x' t~ o ~ ~a~'• 5 ..s---.. O ~ M MAIN OUTFACE - ~ N a ~ g n N L ~ ~ ,iii ( i , J/~'~ Wn W r I ~ ~ Q Q C Z LL a O o 0 d LL u ~ Q Z 4 ~ ~ {ao ~ Q UBAREA 1 ~ ` ~ _ ~ N ~ a ~ ~w~ i\~ ~ ~ ~ ~~1~ ~ ~ ~ ~ O ~ o O O_ " u It II / I ~ J Q J U I) rn N ~ ~ . ? I ~ ~ ~ o gpllllllllllllllllyllU O . I11j ~ ' 1 `~@~~` asses°oo /~~i''i ° 0° Q~° °a °a~: n e° ~ a Iii, t '~,~~c~ ~ _U$N Cn0 ?a°'7_ - a1J N ~ ° - Sa°~ ~ o° ~ ~ ao o ~v . $Y oo ° Q-: g %~0 °0o e°°° ~ ~ a ` ~ 1 n ~ i ~i- \ `sU A HA2 i~ir ~1~~~~ c • ~ ~ ~ e a 111„/,ugAlllllllll?111~~`,~ 1 a ~ ~ ,1 ~ o ~ i, } ~ 4 ~ r y i t A I I I~~i~ ~ ~ ~ ~ S ~ to ~t\ i \ J I i r •o O o 15 8 i l ~ Z O Q + d ~ ~ U i % ~ i 'f ' - t I ~E O ~ Z I o ~ V) C 1 i a 'J U l ~ j,~1 ~~y, / O I JO o MA R DRAINAGE DMDE o i a M ~ o a O N ¦ ¦ ¦ ¦ ¦ ¦ SUBAREA DRAINA(~ DMDE N 1 U ~ a o ~ Z ~ w =o ~ U ~ v~ N ~ ~ X ~r~--,, ~ - w x Z w Q 1 SHEET FLOW ~ ~ Zw ~ Z ~ woo Q li O M O CO a LO ~ U W ¢~~N Z J Z~Nh ZaQZi I O~ooi ~ u r~ I i ~1 N ~ r ~ ' y ~ SUBAREA 4__~ j I\ Q ~1 k1.50 Ac ~ ~ ' ~ SHALLOW Q ~ ~ ~ .MM I Wp~D fD Z ~ JtL'0000 '7 M co CONCENTRATED FLOW o ~ a ~ ~,Y. ~ Z w~~~ ~ c°vzoo ~ O a i g ~ww cn mow o , 'r'> M CHANNEL FLOW ~7 0 ~ a ~ i ~ / ' ~ ~ SUBAI~A OUTFACE ~ ~ o ~ o o 0 . . WETLANDS T REMAIN ~ a ~ o0 } i -Q ~ o Q / ~ ~ O Qo 0 - - ' ~ ~ x Z Y ~ x X Q l.i O O O CO • ~l I ~JOOCO ~ ~~oco U =arn m o=gin co "0 to f~ I ~ a V ~~r~iM a ~w~~ ZC~^~ ~ O NIiNN 1.1 co LO U') yT~ O~^"'` w w0^'~ N N i ~ V ON~00 r nn~lp C C14 C14 N N PRE-DEVELOPMENT DRAINAGE NAGE AND FLOW PATH SCALE: 1"=150' Z 1"=150' =i 2 LU 0 0 4c J W H PRE-DEVELOPMENT AREA TO H TO OUTFALL 153.19 AC. 0 0 in > E- J I Lai Im 1-YEAR RUNOFF 2-YEAR RUNOFF 10-YEAR RUNOI 44 0% ,R RUNOFF 50-YEAR RUNOFF 100-YEAR RUNOFF Ir OM INFLOWS TO; MAIN DUTFALL INFLOWS TO: MAIN DUTFALL INFLOWS TO, MAIN DUTFALL am Uj N Volume Peak Time Peak Flow Volume Peak Time Peak Flow Volume INFLOWS TO: MAIN OUTFALL INFLOWS TO: MAIN OUTFALL HYG file HYG ID HYG tag cu,ft min cfs HYG file HYG ID HYG tag cu.ft min cfs HYG file HYG ID HYG tog cu. ft ~e 0 Z Volume Peak Time Peak Flow Volume Peak Time Peak Flow Volume Peak Time Peak Flow ~ cu. ft min cfs HYG f t le HYG ID HYG tag cu, ft min cfs H V¦ YG file HYG ID HYG tag cu, ft min cfs PRE, HYG SUBAREA 1 1 YR 5454 750. 00 43 PRE. HYG SUBAREA 1 2yr 10486 744. 00 1. 23 PRE, HYG SUBAREA 1 10 r 32933 739, 00 5. 62 PRE. HYG SUBAREA 1 50yr 62265 738, 00 11. 66 PRE, HYG SUBAREA 1 100 r 71514 738, 00 13, 56 PRE. HYG SUBAREA 10 y 3293. lYR 4606 890, 00 . 14 PRE, HYG SUBAREA 2 2yr 13971 764, 00 1, 11 PRE, HYG SUBAREA 2 10Yr 4547 45477 756.00 5. 24 PRE. HYG SUBAREA 2 50 r 87184 755.00 11.25 Y Y PRE, HYG SUBAREA 2 100yr 100399 755, 00 13, 16 PRE. HYG SUBAREA 11 lYR 5803 905,00 17 PRE. HYG SUBAREA 3 2yr 14960 796,00 ,91 PRE, HYG SUBAREA 3 10Yr 48691 PRE, HYG SUBAREA 12 1YR 6088 915. 00 18 PRE. HYG SUBAREA 4 2yr 19875 799. 00 1, 22 PRE. HYG SUBAREA 4 10Yr 6242; 48696 783, 00 4. 08 PRE. HYG SUBAREA 3 50yr 93355 783, 00 8, 65 PRE, HYG SUBAREA 3 100 r 107505 783, 00 10, 11 PRE, HYG SUBAREA 2 lYR 7049 775. 00 39 PRE, HYG SUBAREA 5 2yr 14334 775. 00 1. 04 FRE, h'(G SUBAREA 5 10Yr 46651 ' 62423 787.00 5, 18 PRE, HYG SUBAREA 4 50 r 118021 787 00 10 9 r :IV7 r" Ip,,A~Y y 6 P P C G r1 L 774 Or" PRE, HYG SUBAREA 3 1YR 7548 810, 00 35 PRE. HYG SUBAREA 6 2yr 13040 796, 00 . 70 PRE, HYG SUBAREA 6. 10Yr 4597! 46659 766.00 4. 84 PRE. HYG SUBAREA 5 50yr 89449 766.00 10.27 PRE. HYG SUBAREA 5 100 r 103008 765, 00 11,99 PRE. HYG SUBAREA 4 1 YR 10336 800.00 49 PRE. HYG SUBAREA 7 2yr 22985 809, 00 1. 24 PRE. HYG SUBAREA 7 10Yr 6982: 45979 783.00 3. 59 PRE, HYG SUBAREA 6 50 r 90819 782.00 Y y 8, 06 PRE, HYG SUBAREA 6 100yr 105171 782, 00 9, 52 69821 809.00 4, 85 PRE, HYG SUBAREA 7 50yr 130265 808.00 9, 76 PRE, HYG SUBAREA 7 100 r 149240 807, 00 11, 31 PRE. HYG SUBAREA 5 1 YR 7232 785, 00 38 PRE. HYG SUBAREA 8 2yr 20231 802.00 1, 20 PRE. HYG SUBAREA 8 10Yr 6354; 63543 788.00 4.98 PRE. HYG SUBAREA 8 50 r 120137 788.00 10,36 Y PRE. HYG SUBAREA 6 1YR 6124 820.00 24 PRE. HYG SUBAREA 9 2yr 9646 797.00 46 PRE, HYG SUBAREA 9 10 r 3737( Y PRE, HYG SUBAREA 8 100yr 137984 788, 00 12.07 37370 785.00 2. 90 PRE, HYG SUBAREA 9 50yr 76301 785.00 6.82 PRE. HYG SUBAREA 9 100yr 88897 785, 00 8, 11 2 z PRE, HYG SUBAREA 7 1YR 12285 825, 00 PRE. HYG SUBAR Y .55 EA 10 2yr 10753 835,00 .44 PRE, HYG SUBAREA 10 l0yr 4166: 41661 806.00 2.57 PRE, HYG SUBAREA 10 50yr 85062 806,00 6.02 PRE. HYG SUBAREA 10 r 4 PRE. HYG SUBAREA 8 1YR 10520 815.00 50 PRE, HYG SUBAREA 11 2yr 13547 862,00 52 PRE, HYG SUBAREA 11 10Yr 5248`, PRE, HYG SUBAREA 9 lYR 4132 835.00 13 PRE. HYG SUBAREA 12 2yr 12966 903.00 47 PRE, HYG SUBAREA 12 10Yr 4572 52485 22. 100y 9910 806, 00 7, 17 0 W 8 00 2. 89 PRE, HYG SUBAREA 11 50yr 107161 822, 00 6. 72 PRE. HYG SUBAREA 11 100 r 124852 822, 00 7, 99 u 45724 881.00 2. 11 PRE, HYG SUBAREA 12 50 r 90316 853.00 4.52 Y J Y PRE, HYG SUBAREA 12 100yr 104589 853, 00 5, 33 i PRE-HYG MAIN DUTFALL lYR 87177 815.00 3.34 PRE. HYG MAIN DUTFALL 2 r 176796 796.00 8.74 c PRE, HYG MAIN DUTFALL 10yr 59277( 592770 783.00 40.07 PRE. HYG MAIN OUTFA L L SOyr 1150337 774.00 86.80 PRE, HYG MAIN OUTFACE 100yr 1327819 774, 00 102.05 0) W u E File No. NC Tax Slap No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001SWMPRE XREF: DRAINAGE PLAN STATE/03001BASE SHEET: D12 OF D20 20 PREDEV ELOPMENT TIMES OF CONCENTRATION Tc SUBAREAI ---------------- Segment #1: Tc: TR -55 Sheet Mannings n .4000 Hydraulic Length 300.00 ft 2yr, 24hr P 3,1200 in Slope .055000 ft/ft Avg. Velocity .14 ft/sec -------------------------------------------------------------- ------------ Segment- #1 Time: 34.94 min Segment #2: Tc: TR -55 Shallow Hydraulic Length 620.00 ft Slope .058000 ft/ft Unpaved Avg. Ve loc t ty 3,89 ft/sec -------------------------------Segment- #2 -Time: -------------------- 2.66 min Segment #3: Tc: TR -55 Channel Flow Area 45.0000 sq. f t Wetted Perimeter 22.42 ft Hydraulic Radius 2. 01 ft Slope . 019000 ft/ft Mannings n .0450 Hydraulic Length 264.00 ft Avg,Velocity 7.26 f t/sec -------------------------------------------------------------- Segment #3 Time: .61 min Tota l Tci 38,21 m I n SUBAREA 2 -------------------------------------------------------------- Segment #1: Tc: TR -55 Sheet Mannings n .4000 Hydraulic Length 300.00 ft 2yr, 24hr P 3.1200 i n Slope 041000 ft/ft Avg,Velocity .13 ft/sec Segment #1 T i me: 39.30 min -------------------------------------------------------------- Segment #2: Tc: TR -55 Shallow Hydraulic Length 631.00 ft Slope .055000 ft/ft Unpaved Avg,Velocity 3.78 ft/sec Segment #2 T i me: 2,78 min -------------------------------------------------------------- Segment #3: Tc: TR -55 Channel Flow Area 20-0000 sq, f t Wetted Perimeter 14.94 ft Hydraulic Radius 1. 34 ft Slope .015000 ft/ft Mannings n 4500 Hydraulic Length 270.00 ft Avg,Velocity 49 ft/sec Segment #3 T i me: 9.14 min ------------------------------- Tota l Tci 51, 22 m in SUBAREA 3 -------------------------------------------------------------- Segment #l: Tc, TR -55 Sheet Mannings n .4000 Hydraulic Length 300.00 ft 2yr, 24hr P 3.1200 in Slope . 026000 ft/ft Avg,Velocity .11 ft/sec Segment #1Time: 4715 min ------------------------------- - ----- _ Segment #2: Tc: TR -55 Shallow Hydraulic Length 682.00 ft Slope .050000 ft/ft Unpaved Avg, Velocity 3,61 ft/sec Segment #2 Time315 min ------------------------------- ------- _ Segment #3: Tc: TR -55 Channel Flow Area 5,0000 sq. f t Wetted Perimeter 7.47 ft Hydraulic Radius .67 ft Slope . 015000 ft/ft Mannings n .4500 Hydraulic Length 343.00 ft Avg,Velocity 31 ft/sec Segment #3 T i me: 18,42 min File No. NC Total Tc: 68.73 m i n Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAIN AGE/03001SWMPRE Segment #1i Tc: TR -55 Sheet Mannings n .4000 Hydraulic Length 300,00 ft 2yr, 24hr P 3.1200 in Slope .020000 ft/ft Avg, Velocity .10 ft/sec Segment #1 Time; 52. 37 min ---_ ------------------------------------------------- Se- g #21 Tc TR -55 Shallow Hydraulic Length 972.00 ft Slope . 033000 ft/ft Unpaved Avg,Velocity 2.93 f t/sec Segment #2 Time, 5, 53 min Tota l Tci 57.90 m in SUBAREA 5 ------------------------ ---------------------- Segment #1: Tc: TR -55 Sheet Mannings n .4000 Hydraulic Length 300.00 ft 2yr, 24hr P 3,1200 in Slope 063000 ft/ft Avg, Ve toc i ty .15 ft/sec -------------------------------------------------------------- Segment #1 Time: 33, 10 min Segment #2: Tc: TR -55 Shadow Hydraulic Length 276,00 ft Slope . 062000 ft/ft Unpaved Avg,Velocity 4,02 ft/sec -------------------------------------------------------------- Segment #2 T i me: 1,15 min Segment #3: Tc: TR -55 Channel Flow Area 45-0000 sq. ft Wetted Perimeter 22.52 ft Hydraulic Radius 2.00 ft Slope .010000 ft/ft Mannings n .4500 Hydraulic Length 764.00 ft Avg,Velocity 53 ft/sec -------------------------------- Segment #3 Time: min ----- -Total-Tu -----58_48-min- SUBAREA 6 -------------------------------------------------------------- Segment #1: Tc: TR -55 Sheet Mannings n 4000 Hydraulic Length 30u. Cc it 2yr, 24hr P 3,1200 in Slope ,023000 ft/ft Avg,Velocity .10 ft/sec Segment # 1 T i me: 49,53 min -------------------------------------------------------------- Segment #2: Tc: TR -55 Shallow Hydraulic Length 719.00 ft Slope .075000 ft/ft Unpaved Avg,Velocity 4,42 f t/sec --------------------Segment-#2 Time: 2.71 min Segment #3: Tc: TR -55 Channel Flow Area 20.0000 sq. ft Wetted Perimeter 14.94 ft Hydraulic Radius 1. 34 ft Slope . 008500 ft/ft Mannings n ,4500 Hydraulic Length 472.00 ft Avg. Velocity .37 ft/sec Segment #3 Time; 21.22 min --- Total Tu 73. 45 m i n SUBAREA 7 -------------------------------------------------------------- Segment #1: Tc: TR -55 Sheet Mannings n .4000 Hydraulic Length 300.00 ft 2yr, 24hr P 3.1200 in Slope .017000 ft/ft Avg,Velocity .09 ft/sec Segment #1 Time: 55, 89 m i n -------------------------------------------------------------- Segment #2: Tc: TR -55 Shallow Hydraulic Length 526.00 ft Slope .068500 ft/ft Unpaved Avg, Velocity 4.22 f t/sec Segment #2 Time: 2. 08 min -------------------------------------------------------------- Segment #3: Tc: TR -55 Channel Flow Area 5.0000 sq. f t Wetted Perimeter 7.47 ft Hydraulic Radius .67 ft Slope 017500 ft/ft Mannings n .4500 Hydraulic Length 516.00 ft Avg. Velocity 34 ft/sec Segment #3 Time: 25. 66 min -------------------------------------------------------------- Tota l Tci 83.63 m i n SUBAREA 8 ---------------------------------------------- Segment #1: Tc: TR -55 Sheet Mannings n .4000 Hydraulic Length 300.00 ft 2yr, 24hr P 3. 1200 i n Slope 033000 ft/ft Avg, Velocity .12 ft/sec Segment #1 T i me: 42, 87 min -------------------------------------------------------------- Segment #2: Tc: TR -55 Shallow Hydraulic Length 673.00 ft Slope . 043000 ft/ft Unpaved Avg. Ve toc i ty 3.35 ft/sec Segment #2 T i me: 3. 35 min ------------------------------ Total Tci 46.22 m i n SUBAREA 9 Segment #1: Tc: TR -55 Sheet Mannings n .4000 Hydraulic Length 300.00 ft 2yr, 24hr P 3.1200 in Slope 037000 ft/ft Avg, Ve loci ty .12 ft/sec Segment #1 Time: 40, 95 min -------------------------------------------------------------- Segment #2: Tc: TR -55 Shallow Hydraulic Length 973.00 ft Slope 057000 ft/ft Unpaved Avg. Ve loc i ty 3,85 ft/sec Segment #2 Time: 4 ------------------------------- ----- _ 21min - Segment #3: Tc: TR -55 Channel Flow Area 45.0000 sq, ft Wetted Perimeter 22.42 ft Hydraulic Radius 2.01 ft Slope .033000 ft/ft Mannings n .4500 Hydraulic Length 245.00 ft Avg, Ve loci ty .96 ft/sec Segment #3 Time: 4_ 27 min ------ Total Tci 49.42 m i n SUBAREA 10 -------------------------------------------------------------- Segment #1: Tc: TR -55 Sheet Mannings n 4000 Hydraulic Length 300,00 ft 2yr, 24hr P 3,1200 in Slope 040000 ft/ft Avg. Velocity .13 ft/sec Segment #1 Time: 39. 69 m i n -------------------------------------------------------------- Segment #2: Tc: TR -55 Shallow Hydraulic Length 517.00 ft Slope .066000 ft/ft Unpaved Avg, Velocity 4,15 f t/sec Segment #2 T i me: 2. 08 m i n -------------------------------------------------------------- Segment #3: Tc: TR -55 Channel Flow Area 45.0000 sq. f t Wetted Perimeter 22. 42 ft Hydraulic Radius 2.01 ft Slope 026000 ft/ft Mannings n .4500 Hydraulic Length 1135.00 ft Avg, Ve l oc i ty .85 f t/sec Segment #3 T i me: 22.27 m i n Tota l Tci 64.04 m i n SUBAREA 11 ------------------------------------------------------------- Segment #1: Tc: TR -55 Sheet Mannings n .4000 Hydraulic Length 300. 00 ft 2yr, 24hr P 3. 1200 I n Slope 057000 ft/ft Avg, Velocity .15 f t/sec Segment #1 Time: 34. 45 min -------------------------------------------------------------- Segment #2: Tc: TR -55 Shallow Hydraulic Length 1002.00 ft Slope . 036000 ft/ft Unpaved Avg. Velocity 3. 06 ft/sec Segment #2Time 5 46 min ----------------------------------------_- Segment #3: Tc: TR -55 Channel Flow Area 45,0000 sq. f t Wetted Perimeter 22.42 ft Hydraulic Radius 2.01 ft Slope .016000 ft/ft Mannings n .4500 Hydraulic Length 629,00 ft Avg. Velocity .67 ft/sec Segment #3 T i me: 15,73 min Total Tci 55, 63 m i n SUBAREA 12 -------------------------------------------------------------- Segment #1: Tc: TR -55 Sheet Mannings n .4000 Hydraulic Length 300.00 ft 2yr, 24hr P 3.1200 in Slope 013000 ft/ft Avg. Velocity 08 ft/sec Segment #1 Time: --------------------------------- Segment #2: Tc: TR -55 Shallow Hydraulic Length 673.00 ft Slope .031000 ft/ft Unpaved PREDEVELOPMENT TRAVELTIMES Tt TRAVEL TIME 1 ------------------------------------------ Segment #1: Tc: TR -55 Channel Flow Area 0,0000 sq. ft Wetted Perimeter 0.00 ft Hydraulic Radius 0.00 ft Slope . 000000 ft/ft Mannings n .0000 Hydraulic Length 0. 00 ft Avg. Velocity .00 ft/sec -------------------------------------- Total Tti------0_00-min - TRAVEL TIME 2 ------------------------------------------ Segment #1: Tc: TR -55 Channel Flow Area 45. 0000 sq, ft Wetted Perimeter 22, 42 ft Hydraulic Radius 2.01 ft Slope .021000 ft/ft Mannings n .4500 Hydraulic Length 570.00 ft Avg.Velocity 76 ft/sec ------------------------------------------- Total Tti 12.44 m I n TRAVEL TIME 3 ------------------------------------------ Segment #1: Tc: TR -55 Channel Flow Area 45.0000 sq. ft Wetted Perimeter 22.42 ft Hydraulic Radius 2. 01 ft Slope . 016000 ft/ft Mannings n 4500 Hydraulic Length 1168,00 ft Avg, Velocity 67 ft/sec -------------------------------------- Tota I Tti 29.21 min TRAVEL --------------------------------------TotalTti29_21min TRAVEL TIME 4 --------------- -------------------------- Segment #1: Tc: TR -55 Channel Flow Area 45.0000 sq, ft Wetted Perimeter 22.42 ft Hydraulic Radius 2.01 ft Slope .017000 ft/ft Mannings n .4500 Hydraulic Length 1808.00 ft Avg. Velocity . 69 ft/sec -------------------------------- Total-Tti---- 43_87 min TRAVELTIME 5 ------------------------------------------ Segment #1: Tc: TR -55 Channel Flow Area 45. 0000 sq, f t Wetted Perimeter 22.42 ft Hydraulic Radius 2.01 ft Slope ,010000 ft/ft Mannings n .4500 Hydraulic Length 481.00 ft Avg. Velocity .53 ft/sec 62_ - 22min- Total Tti-----15_22-min - Avg,Velocity 2. 84 ft/sec Segment #2- T i me_------ 3_ 95- min --------------------------------------- ---- Total Tci -----66_17 min TRAVELTIME 6 ------------------------------------------ Segment #1: Tc: TR -55 Channel Flow Area 45. 0000 sq. ft Wetted Perimeter 22,42 ft Hydraulic Radius 2.01 ft Slope 015000 ft/ft Mannings n .4500 Hydraulic Length 1073.00 ft ray. �c ty .65 ft/sec Total-Tt:-----27_71-min _ TRAVEL TIME 7 ------------------------------------------ Segment #1: Tc: TR -55 Channel Flow Area 45.0000 sq, ft Wetted Perimeter 22,42 ft Hydraulic Radius 2.01 ft Slope .013000 ft/ft Mannings n .4500 Hydraulic Length 1739.00 ft Avg. Velocity .60 ft/sec ------------------------------------------ Tota I Tti 48_25 min TRAVELTIME 8 ------------------------------------------ Segment #1: Tc: TR -55 Channel Flow Area 45.0000 sq, ft Wetted Perimeter 22.42 ft Hydraulic Radius 2. 01 ft Slope . 014000 ft/ft Mannings n 4500 Hydraulic Length 2366.00 ft Avg,Velocity 62 ft/sec ------------------------------------------ Total Tt: 63, 26 m i n 0 TRAVEL TIME 9 ------------------- ---------------------- Segment #1: Tc: TR -55 Channel Flow Area 45. 0000 sq. ft Wetted Perimeter 22.42 ft Hydraulic Radius 2.01 ft z Slope . 010000 ft/ft P= Mannings n .4500 Hydraulic Length 1489.00 ft W 0 Avg.Velocity 53 ft/sec 0 ------------------------------------------ z co -Total Tti---_-47_10 Min_ U TRAVEL TIME 10 a .0 o 4 o N U j �M N� Segment #11 Tc: TR -55 Channel _ � z W o Z W 5 PC J= ZE Flow Area 45. 0000 sq. ft U °dr Q w Lo� Z F z o N Wetted Perimeter 22. 42 ft Z Z a z CMD -1 1 0 o o,, Hydraulic Radius 2. 01 ft W a ��o^oc^o v c��',N,N V W �o co Z 05 z a: co 00 Slope .010000 ft/ft O c o-:: . 5 -'W Mannings n 4500 � Q � o � Hydraulic Length 2132.00 ft p Avg. Velocity . 53 ft/sec Q ------------------------------------------ M o 0 , a ----------------------- �-d W M W M _Total Tt�----_67_44-min- I- M o a CL N� 0 �-= 0 C_ V UL> � coQ TRAVEL TIME 11 J o N o U WEN m =soon ------------------------------------------ f� H zo O a' = W cOI; t.- n NWn znl� QLi-NN C�lW,jwoO�co Segment # 1: Tc: TR -55 Channe t*A: c o m N Flow Area 45,0000 sq, ft Wetted Perimeter 22.42 ft Hydraulic Radius 2. 01 ft Q Slope . 010000 ft/ft Mannings n .4500 z �. Hydraulic Length 3114.00 ft W J Avg,Velocity .53 fWt/sec O a oc a ------------------------------------------ ® V -Total Tt:-_---98_51 min- W mi :�•� J F- W 0 0 TRAVEL TIME 12 > 'j Z ------------------------------------------ W 9C W% CC Uj'Q >- = P Segment #1: Tc: TR -55 Channel V Z va Flow Area 45. 0000 sq. ft U Wetted Perimeter 22.42 ft 0 Hydraulic Radius 2.01 ft 0 4 O S lope .010000 ft/ft V Mannings n ,4500 O Hydraulic Length 4647.00 ft '� 5? rt/Se_ W ------------------------------------------ o0 � Z W Total -Ttl---_147_00 min- ca J Q � V W SHEET:D13 OF D20 C n a I r n o s X I r' ~ ~ ~ ~ ~ o 1?" i,/ ~ ~ ~ MAJOR DRAINAGE DMDE ~ U U \ = Z r a ~ U ~ ~ - O ~ ~ MAIN OUTFACE a Q c i w ~ ~ d Q C t ~ . ~ . ~ ~ ~ ~ WETLANDS TO REMAIN cn C /s ~ iii N m ' n{-.LL. ~ 6' ~ + + •Y• Y. •y• AI + + H Y• •i ~ \ X11 ~ ~ ~ + F / / / .~W~: ~:.i+y m • + + :."n: ~ ~ 'i / ~ i + / • + + + ~ s + + ~ \ M /~l.,./'A ~ O M / ~ + + a + \ ~ ~ y + + + ~ ~ N ~ v i \ ~ / / + n ~ ~ / / / / + \ o ~ I'~ + ~ ~ ~ ~ Li.J ~ / ~ Q , ~ 1 1 ~ LL ~ 1 S ~ ~ i + i ,.i---/ / t ~ ~ ° i i + \ ~ tL ~ iii + + + ~ I ~ ~ + / / + + + + 4 1 ~ + + + / + + \ \ ~ ~ l / ~ ~f r o , + ~ 1 0 J ~ ~ ~ ~ 3. ^ O r + + .O ~'~m ~ ~ ~ U N v o I ~ + o + 1...~\ ~ O O x ~ ~ n II - / / ~ w J r / a Q U fJ') i ' SEDI~I ~ ' ~ ' ~ , ~ _J ~ ~ ~ unwnuul'pyi \ ' ~ ~ ~ r- ~ m i ~ ~'ti ~ ~ eee iy r s ~ 0 ee Mee e an w o ~ ~ ~ f ~ ~ee• r-~ ° c - ~ = eN ~ Z°o 7 a ~ ~ i~ ~ ~ =U eu~! N~~o° _ ~ / V' ed ee`et 4q~~DA, oe V` \ r / r'`- ~ ~ / Ipl4N p1`~~~~ unmunnn f / 1 ~ ~ ~ ~ ~ ~ o a 0 ~l ~ ~ \ ~ ~ ~ ' 1. , , ~ ~ ~ ~ I Y i~ r ~ ~ i t ,i ~ J l + + J ~ r; ~ - > ~ ~ ~ ~ /J~ ~~4 ~ ~ ~ 1 ti~ ~ ~ ~ 1 ' ~ l 1 l I \ ~ ~ fry l ~ \ 1 v r ~ ~ ~ ~ ~ I i. ~ ( ~ J , ~ i ~ w \ 1 > ~ \ , ~ ~ ~ ~ j r ~ ~ / z ~ O~ > o F p ~ ~ ~ i a ~ / ~ \ , ~ \ U 1 ~ \ ~ ~ ~ o ~ ~ i t ~ ~ I. ~ C ~ L. ~ ~ ~ 1 I ~ ~ 7 ~ l ~ , ~ _ \ ~ ~ ~ 'ti 1 ~ ~ i ~ ~ ~ I x 1 d ~ ~ z ~ 3 o I _ ~ ~ f i ~ ~ ~ ~ r ( r ~ p \ ~ 5b +i , r x bs 1' J J / ~ ' i ~ ~ r Q 0 ~ 1 ~ ~ ~ ~ L ` i I o I l ~ ~ O ~ M ~ ~ ~ o l ~ - ' ~ ~ ~ O Q O N N o ~ , ~ V r ~M L I Z ~ ~ . o e Q V w .o o ~ W x ~ r oo x X Q 0 C~ 7tT~zW ~ Z~woo ~ ti > M I ~ ,I w Q' WZ00pp ~ Z ~~tDM v J Q 99¢ , u'~ ~ W cp ca ~ ~ U woo r- Z Z o co ~n ~ I I ~ / W ca~~ J J-~Nr, > co > tf) J1+ \ ~ j - wadU ~ a oo ao V v ,N~ N I J N 7 M ~ ~ i t / ~ N wo`~°t^° ~ J~a0oM0 00 t ~ ~ ~ C ~~MM ~ V O~MM z ~r`~ 3 NZOo ~ O I a ~a0~0~ ~A ~WMM M > O ~ M ~ ~ ~ r ~ - ~ ~ ~ _ J ~W~,~ vI .-mow ~ V ~r C r r 1 ~ 1 ~ 1 e t r ,j , i I V. 1~ r ~1 , ~ l U V ll i ~ ~ 1 ~ ~ l i~ U ~ 1 ~ ~ ~ 1 i i ( ~ ~ ~ ~ ~ i_1 i ~ i ! ~ ~ ~ ~ i ~ ~ / J ~ , , I \ ~ ~ 1 I ~ ~ o °o i r o / ~ ~ M ~ ~ / M o ~ ~ ~ r~ ~ r~ - ao Q ~ ao ~ l i ~ ! ~ -Q ~ o Q I ~ y r1 , ~ ~ O a o v Q ~ ~ ~ , l ~ ~ 1 ~ =v U ' V z~ W~ x X l 1. ~ x ~ ¢ Z a ~ ¦ NJ LL CQC J J Q = = JOB G C.~JO~ O cD ~ rJ ` ~ry ~ f- ~zoorn ~ ~ oovir .0 )o Lo r~ ~ \ ` ~ ~ i , ~ / Q V oE-,r,>ri la~ 4 cnw~00r,~ ZOt~f~ r V QLiNN 30 i I n co n Ul) :V N ~ \ ~ \ ~ ~ ~ i ~ / ~ O~~-.,~ w Wp.v. ~ 1 / ~ ~ ~ p d' O O .O} ^v. :V N CN Rio siz.4 ur5 rIIIIIIIIIIIIIIIIIII` Q 2= 102.1 98 CFS :FS ui a J l 010= 158.3 CFS TO EDW #2 a ui o 0c 0 C - ~ ` A=11.46 Ac W a ~ t SUBAREA 1D' W J = CN = 98 W C AREA =10.57 Ac j N O1 = 37.9 CFS o =J ~ o C CN = 98 SUBAREA 3E ,i Q2=46.1 CFS 0 > ~ °z AREA 0.00 010= 65.9 CFS CN = 4.17 Ac SUBAREA 3D Quo 71.5 CFS a LU v = ~r , 02= 42.5 CFS AREA = 6.45 Ac TO EDW #3 o a LL Qp =16.8 CFS CN 98 O J ° v NONE FF wwo; -0 Q2= 25.9 CFS A = 73.89 Ac F 2 low Q10= 26.0 CFS ~ ~ 010= 40.2 CFS CN = 98 w ~ Z3 ~ O1 = 244.34 CFS co O w u ames ( 02 -29720 CFS U Z Y u 9 ~ POST-DEVELOPMENT DRAINAC AINAGE AND FLOW PATH Oro 460.79 CFS ~ SCALE: 1"=1 00' 2 SHEET: Dl 4 OF D20 File No. m , Job No. 03-001 Caaa s File: oa>Irv>GE,o3001 SWIVI POST ,aE. DRAINAGE PLAN S.a;E,03001e.sE i20 i STORM 1 -YR STORM EXTENDED DETENTION WETLAND 02 POSTDEVELOPMENT: A =11.46 Ac Tc = 5 MIN. CN=98 EXTENDED DETENTION WETLAND #2 EDW #2 - T HYDROGRAPH � Elevation ft Outflow Storage Area ________________________ Infllt, Q Total 2S/t + 0 ---------------cfs- ------------------------ cu, ft sq, ft cfs cfs cfs 733, 00 733. 10 00 02 0 2301 22895 00 00 1 00 733, 20 03 4629 23145 23397 00 00 02 76.74 733-30 04 6981 23650 00 03 04 154, 34 733.40 , 04 9360 23905 , • 00 2,56 232, 74 733, 50 733, 60 .05 11762 24160 .00 .04 , 05 312.03 392.13 733, 70 .05 , 06 14191 16646 24418 24676 00 05 473, 08 733.80 .06 19126 24936 .00 00 06 554.93 733, 90 .06 21634 25197 . , 00 .06 637.60 734, 00 734, 10 07 07 24166 25460 00 .06 .07 721.19 805.60 734,20 , 07 26724 29309 25714 2596900 00 , 07 890.88 734, 21 , 07 29569 25994 07 977, 05 734.30 12 31918 26225 .00 00 07 12 985. 72 734,40 12 34555 26482 , 00 12 1064,06 734.50 13 37215 26741 00 13 1151-94 734-60 14 39901 27000 00 14 1240.63 734, 70 15 42615 27262 00 15 1330,19 734, 80 16 45354 27524 , 00 16 1420, 67 734, 90 17 48121 27788 00 17 1511, 96 735, 00 18 50912 28053 , 00 18 1604, 19 735.10 735, 20 19 20 53730 28319 00 19 1697-24 1791. 18 735, 30 .20 56576 59448 28586 28855 00 20 1886, 06 735, 40 21 62348 29125 00 00 .20 1981.78 735, 50 .22 65273 29396 00 21 22 2078, 46 735. 60 735, 70 22 23 68225 29669 00 22 2175, 97 2274, 40 735, 80 • .23 71207 74214 29942 30217 00 23 2373, 79 735, 90 , 24 77251 30494 00 00 ; �4 2474, 04 736.00 24 80313 30771 00 2575.26 736, in a� 24 2677, 35 736, 2 -YR STORM 736, E 736, 7 736, E 736.5 737, 0 737, 1 737, 2 737, 3 737, 4 737. 5 10 -YR STORM 737. S 737, 61 737, 71 737, 81 737, 9( 738, 0( 738, 1( 738, 2( 50 -YR STORM 738, 2E 738.3C 738,40 738.50 738, 6 738, 7 738. 8 738, 9 739. 00 •36 ,50 89664 92837 31574 31844 00 00 .67 96034 32115 ,00 86 99258 32388 .00 1,06 102512 32661 00 1,28 105791 32936 00 1,49 109099 33212 00 1,71 112434 33489 00 1,93 115796 33767 00 2,15 119187 34046 00 2,36 122605 34326 00 2,56 126053 34608 00 2,76 129527 34890 00 2.90 132328 35117 , 00 3,05 133029 35174 00 4,68 136562 35459 00 7,15 140122 35745 00 10,21 143712 36033 00 13.74 147329 36321. .00 17,68 150974 36600 00 36 50 .67 86 1, 06 1, 28 1, 49 1, 71 1, 93 2, 15 2.36 2, 56 4, 68 7, 15 10, 21 13.74 17. 68 21, 98 24, 10 ' .+v IJOJJl J/I6i 00 O O 0 31.52 162082 37445 00 331, 52 D 36, 71 165840 37728 . 00 36, 71 0 42, 14 169626 38013 00 42, 14 0 47, 82 173443 38299 , 00 47, 82 D 53, 71 177286 38585 00 53, 71 0 59, 81 181161 38873 00 59, 81 66, 09 185061 39162 00 66, 09 1' STORM ROUTING SUMMARY INFLOW/OUTFLOW HYDROGRAPH SUMMARY ------------------ Peak Inflow 13.57 cfs at 715.00 M I n Peak Outflow = .07 cfs at 1051.00 M i n -------------------------------------- Peak Elevation = 734.21 ft Peak Storage = 29495 cu, ft 1 -YR STORM ROUTING SUMMARY INFLOW/OUTFLOW HYDROGRAPH SUMMARY ------------------------ Peak Inflow =90 cfs at 715.00 M I n Peak Outflow = .26 cfs at 1421.00 M i n ------------------------------------ Peak Elevation = 736,18 ft Peak Storage = 86013 cu,ft 2 -YR STORM ROUTING SUMMARY INFLOW/OUTFLOW HYDROGRAPH SUMMARY ------------------------ Peak Inflow =46.09 cfs at 715.00 M I n Peak Outflow = .71 cfs at 1012-00 M I n -------------------------------- Peak Elevation = 736,52 ft Peak Storage = 96640 cu, ft 10 -YR STORM ROUTING SUMMARY INFLOW/OUTFLOW HYDROGRAPH SUMMARY -------------------------------------------- ------------------- Peak Inflow = 71.47 cfs at 715.00 M i n Peak Outflow = 2.90 cfs at 795.00 M I n ---------------------------------- Peak Elevation = 737,58 ft Peak Storage = 132292 cu, ft 1' DRAWDOWN OVER 2 TO 5 DAYS 2989.17 3095.05 3201.79 3309. 46 3418, 12 3527, 63 3638, 13 3749, 49 3861. 77 3975, 05 4089.18 4204, 32 4320.32 4413.83 4437, 35 4556, 75 4677, 87 4800, 60 4924.69 5050, 14 5176.95 5251, 33 5304, 94 5434.25 5564.69 5696.33 5829.24 5963-23 6098-48 6234.79 OUTLET COMPUTATION DETERMINE THE REQUIRED ORIFICE SIZE FOR EACH EXTENDED DETENTION FACILITY (A) 1" STORAGE REQUIREMENT (S) (a) 35,360 CF (SEE SHEET 5) (B) MAXIMUM HEAD (h) AT THE REQUIRED 1" STORAGE FROM THE ELEVATION -STORAGE CURVE FOR THE FACILITY (b) 1.50 FT (734.50 - 733.00) (C) RATE (Qp) AT THE MAXIMUM HEAD FOR A DRAWDOWN PEArF120 TIMRS [Qp = S/(1.0 x 3600 x 120] 0.0000116 x LINE (a) 35,360 = (c) 0.0819 CFS (D) REQUIRED ZRIFICE AREA (A) [A = Qp/(0.6 x (64.4 x hf" )] LINE (c) 0.0819 0.6 x (64.4 x LINE (b) 1.50 °-1 (d) 0.0139 (E) DIAMETER OF A CIRCULAR ORIFICE 2.0 x (LINE (d) 0.0139J3.1415927)' (e) 0.133 FT = 1 1/2" DIA. ORIFICE File No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001 SWMPOSTI 1c We 8 U O 6 LL 3C cn 20 30 20 ILL 10 7C Tt all y 30 U O 20 LL 10 C 10 0 0 2 500 1000 1500 2000 Time (min) EDW #2 -1-YR HYDROGRAPH 500 1000 1500 2000 Time (min) - EDW #2 - 2 -YR HYDROGRAPH 500 1000 1500 Time (min) EDW #2 -10-YR HYDROGRAPH 2000 500 1000 1500 e (min) 2000 RISER STRUCTURE FLOTATION CALCULATIONS I. WEIGHT OF WATER DISPLACED CONCRETE BASE = Ah _ (6.17 ft)(6.17 ft) (0.67 ft) = 25.51 ft3 MANHOLE = Ah _ (4.42 ft) 4.42 ft) (4.58 ft) = 89.48 ft WHERE h = 10 YR. ELEV. - BMP INV. = 737.58 - 733.00 = 4.58 ft TOTAL VOLUME DISPLACED = 25.51 + 89.48 = 114.99 TOTAL WEIGHT OF WATER DISPLACED = (1.3)(114.99 ft3 )(62.4 Ib) = 9,328 Ib WHERE 1.3 = FACTOR OF SAFETY ft3 II. WEIGHT OF CONCRETE VOL CONCRETE BASE = A h = (6.17 ft)(6.17 ft) (0.67 ft) = 25.51 ft3 VOL MANHOLE WALLS = [A (OUTSIDE WALL) - A (INSIDE WALL)] x H = [(4.83)(4.83) - (4.0)(4.0)] 6.58 = 48.22 ft3 VOL. CONCRETE PLACED IN BOTTOM OF MANHOLE VOL. = A h = (4.0 ft)(4.0 ft) (2.0 ft) = 32.00 ft3 TOTAL VOL. CONCRETE = 25.51 + 48.22 + 32.00 = 105.73 ft3 TOTAL WEIGHT OF CONCRETE = (105.73 ft3)(150 Ib) = 15,860 lbs CONCLUSION 9,328 Ib < 15,860 Ib ft3 THEREFORE RESISTANCE TO FLOTATION IS ACHIEVED. 1" STORM DRAWDOWN 1 1/2" DIA, HOLE z • ; .� 0 � s Y Q _U r • Z F i ov BMP TRASH RACK (SEE DETAIL) 50 YR. WSE= 738.26 10 YR. WSE= 737.58 2 YR. WSE= 736.52 1 YR. WSE= 736.18 PROP. 18" CL III RCP 24"W X 24"H X 1/4- SOLID GALV. STEEL PLATE FASTENED WITH BOLTS AND SEALED WITH SILICONE TRASH RACK 1 --TRASH RACK PROVIDE SLUICE GATE FOR ' EMERGENCY DRAINf��' -' 0.80' EL. = 736.18 li 4'x4' JUNCTION0.2'W x 0.1'H HOLE , 5" BOX TYP 4' x4' JUNCTION 24"W X 24"H X 1/4" SOLID GALV. 1" STORM WSE= 734.21 _ BMP TRASH RACK BOX, (TYP) (SEE DETAIL THIS SHEET.)1" DRAWDOWN (SEE DETAIL) , 1 - 1 1/2" DIA. HOLEINV- 7.11 nn " e u 'e f • 2.0 -STEPS 1.0' SPACING (TYP.) 6"x 18"x 1/4" GALV. PLATE (4 AT EACH JOINT BOLTED TO RISER) TOP= 737.58 PRECAST RISER SEGMENT WITH FLAT TOP /-WATER TIGHT CONNECTION / PROP. 18" CL III RCP PRECAST RISER SEGMENTS `-INV.= 732.90 0 \ A, f g PRECAST RISER 2.5' CONC. APRON 8" SEGMENT WITH BASE (6" THICK) CONC. ENCLOSURE SHAPE BOTTOM TO POUR IN BASE TO SLOPE INVERT COUNTERACT TO OUTLET BUOYANCY DETENTION CONTROL STRUCTURE NOTE : ALL JOINTS BETWEEN PRECAST STANDARD 4 x 4 JUNCTION BOX OR EQUIVALENT RISER SEGMENTS SHALL BE (PRIVATELY OWNED AND MAINTAINED) MADE WATER TIGHT WITH BUTYL RUBBER 0 -RING PER NORTH CAROLINA DOT GASKETS. NOT TO SCALE METAL GRATING (GALV. STEEL) WELDED TO 1/4" SOLID STEEL PLATE (3"x1" MAX. OPENING) ELEVATION 1/4" SOLID STEEL PLATE ° BOLTED TO STRUCTURE Ki I e f 24"W X 24"H X 1/4- SOLID STEEL PLATE BOLTED TO STRUCTURE WITH SILICONE ( - SILICONE SEALANT 1/2" 1" STORM DRAWDOWN HOLE METAL GRATING (GALV. STEEL) WELDED TO 1/4" SOLID STEEL PLATE (3"x1" MAX. OPENING) SECTION NOTES: 1. ALTERNATIVE CAGE CONFIGURATIONS ARE ACCEPTABLE AS LONG AS THE FLOW VELOCITY THRU THE CAGE AT THE MAX. BMP POOL ELEV. IS LESS THAN 0.15 FPS. 2. THIS DETAIL (METAL GRATING AND STEEL PLATE) MAY BE APPLIED DIRECTLY AGAINST THE RISER. 3. FOR LARGER CAGES (HEIGHT > 5') A 3'x2' HINGED GATE WITH LOCKING MECHANISM SHALL BE INSTALLED ON THE FRONT FACE OF THE CAGE. BMP RELEASE HOLE AND TRASH RACK DETAIL N.T.S. H 2 U U aW 0 =J co j �N N Z a S ■ � s J o Z to cc Q a lu lL uw Q O � � N LU W z � � o N *0 ®® N Q 0 0 z W co J a � U Q a 00 W i 0 Q o IV w �C,4 w-' x ��=°o x W -;=3 Q zZWp s o LLJ 00 o- Z p�� Z ¢z-5- 0 a oo�� Z LLJN EMP'<5 V U � too o''"o W �� Z z _ J Nzoo Uj 0 CD o � P7 M Ln CL S2 Q oZ ��- O Q F- In � Cl=Z Y Q J C17 � Zorn oQcoo� 0:p - I I Q o �-- ^ Q a ►- o0 00 OZ'p �- 0 QN NN Z LwL� LLj MLE C LLj NM F- a Q Z W IMMo a cc Q 0 O V J W = '.. J F- jr z O O O > -j Z W IMM Z W = >' W 141dV ~ Z U W a Q V D ...1 ImIm o Z W Z W � V W SHEET: D150F D20 Elevation Outflow Storage Area Inf~lt, Q Total 2S/t + D ft cfs cu, ft sq. ft cfs cfs cfs H ~ - 80 U 734, 00 , 00 0 110248 , 00 , 00 , 00 U 734, 10 , 46 11054 110881 , 00 , 46 368, 91 734, 20 , 64 22178 111516 ~ 00 , 64 739, 90 70 . _ _ _ z • - - - U a. 734, 30 , 79 33358 112153 , 00 , 79 1112, 73 Y Y 734, 40 , 91 44610 112792 , 00 , 91 1487, 90 W Q ZQ 734, 50 1, 02 55918 113432 , 00 i. i,2 1864, 95 3 Q 3 Q 60 734, 60 1, 11 67291 114074 , 00 1. 11 2244, 13 ~ U o 734, 70 1, 20 78734 114718 , 00 1, 20 2625, 68 O 734, 80 1, 29 90236 115364 , 00 1, 29 3009, 13 z c " N N 50 734, 90 1, 37 101809 116012 , 00 1, 37 3394, 98 N 735, 00 1, 44 113439 116661 V , 00 L 44 3782 74 735, 10 1, 51 125135 117312 , 00 1, 51 4172, 67 3 g EDW #3 IN 1 735, 20 1, 58 136903 117965 _0 40 z 00 1, 58 4565, O1 735, 30 1, 64 148730 118620 , 00 1, 64 4959, 29 1" STORM DRAWDOWN ~ 3 1/2" DIA. HOLE ~ EDW #3 OUT 1 f STORM 735, 31 1, 65 149917 118686 , 00 1, 65 4998, 88 ° S 735, 40 1, 73 160629 119277 , 00 1, 73 30 5356, 02 t d r 735, 50 1, 85 172587 119935 , 00 1, 85 5754, 72 . f ° 735, 60 1, 98 184610 120595 , 00 1, 98 6155, 64 Z ~ M O ~ 0 r O M 735, 70 2, 11 196707 121258 , 00 2, 11 6559, 00 20 735, 80 2, 34 208863 121922 , 00 2, 34 6964, 43 ~ a. _ ~ ~ LO 735, 90 2, 43 221093 122588 , 00 2, 43 7372, 18 U aY " o PROP. 36 ~ ~ 736, 00 2, 51 233382 123255 , 00 2. 51 7781, 91 ~ ~ ° • CL III RCP z 10 736, 10 2, 60 245737 123906 , 00 2, 60 8193, 8c o: N p a ~ co Q o LL ~ Q 736, 20 2, 68 258165 124559 , 00 2, 68 8608, 16 ~n 736, 30 2, 76 270651 125214 , 00 2, 76 9024, 42 N . • d 736, 40 2, 83 283 09 2 125870 , 00 2, 83 9443, 12 BMP TRASH RACK e , 736, 50 2, 91 295826 126528 , 00 2, 91 9863, 76 (SEE DETAIL) 736, 60 2, 98 30850 500 1000 1 9 127188 , 00 500 2000 2.98 10286, 58 736, 70 3, 05 321265 127850 , 00 3, 05 10711, 87 ° Q To 736, 80 3, 11 334080 128513 , 00 3, 11 11139, 10 i N 736, 90 Time min 3, 18 346910 129178 , 00 3, 18 11568, 81 Q 737, 00 3, 24 359917 129844. , 00 3, 24 12000, 47 24"W X 24"H X 1 4" SOLID GALV. ~ W ~ 737, 10 3, 31 372932 130512 , 00 3, 31 12434, 35 STEEL PLATE FAS NED WITH 0 J ~ ~ O BOLTS AND SEALED WITH SILICONE N 737, 20 3, 37 386022 131183 , 00 3, 37 12870 7~ _ _ 50 YR. WSE= 141.50 STEPS 1.0 SPACING (TYP.) 737, 30 3, 43 399170 131854 , 00 3, 43 13309, 08 10 YR. WSE= 140.29 a ¦ 737, 40 3, 49 412394 132528 , 00 3, 49 13749, 93 - 6"x 18"x 1 4" GALV. PLATE Z 2 YR. WSE- 738,69 / ~ Z 4.1 737, 50 3, 55 425678 133203 , 00 3, 55 14192, 77 737, 60 3, 60 439028 133880 , 00 3, 60 14637, 86 TRASH RACK 4 AT EACH JOINT BOLTED 1 YR. WSE= 731, 84 ( J Q U 737, 70 3, 66 452455 134559 , 00 3, 66 15085, 47 TO RISER) ~ N N 1-YR 731, 80 3, 72 465942 135239 , 00 3, 72 155 PROVIDE SLUICE 35, 08 737, 90 3, 77 479505 135921 , 00 3, 77 15987, 23 GATE FOR TOP= 740.29 2.70' EMERGENCY DRAIN " 1' ~m111°011~uuir, 738, 00 3.83 493128 136605 ~ 00 3, 83 16441, 39 EL.=738.69 ~ MIN. ~''''~i, 738, 10 3, 88 506818 137260 , 00 3, 88 16897, 77 200 f PRECAST RISER SEGMENT a~.~` °.°°°°00 4a,,~ WITH FLAT TOP ~ ~a ° °e 738, 20 3, 93 520582 137917 , 00 3, 93 17356, 61 a v ~ WATER TIGHT CONNECTION : ~ 738, 30 3, 98 534403 138574 , 00 3, 98 17817, 37 738, 40 4, 03 548298 139234 , 00 4. 03 18280, 60 4x4 JUNCTION 0.6 W x 0.3 H HO > = = " LE 4x4 JUNCTION = Q ~ ~ Wo • 738, 50 4, 08 562251 139895 , 00 4, 08 18745 75 " 5 BOX TYP . ~ g,n ?g ~ „ 1 STORM WSE= 735.31 BMP TRASH RACK BOX ~(TYP) PROP. 36 ;W o o ~ 738, 60 4, 13 576270 140558 , 00 4, 13 19213, 11 24 W X 24 H X 1/4 SOLID GALV, (SEE DETAIL) a CL III RCP =,y °~d, o° ~v 2-YR STOf~ui 738, 69 4, 18 588951 141156 , 00 150 4, 18 19635, 85 SEE DETAIL THIS SHEET. " ~ YC~ ~ ( ) 1 DRAWDOWN o " o ~i ~ `C - 738, 70 4, 19 590365 141222 , 00 4, 19 19682 97 N 1 - 3 1 2" DIA. HOLE PRECAST RISER '%,,~N / 738, 80 4, 52 604517 141888 , 00 4 V 52 20155, 04 _ SEGMENTS ~''''rnwn um~n~``° - • ~ . um 738, 90 5, 05 618744 142556 , 00 5, 05 20629, 81 739, 00 5, 69 633030 143225 3 EDW 3 I N 1 YR oo # 5. 69 21106, 64 ~ 739, 10 6, 44 6473$c 143895 , 00 6, 44 21585, 19 - 739, 20 7, 26 6 1 QO EDW 3 ~ T ~ ~ ~ ~ INV.- 733.90 61810 144568 # U 1 YR , 00 7, 26 22067. 56 739, 30 8, 15 676297 145241 , 00 8, 15 22551, 35 739, 40 9, 10 690861 145917 , 00 9, 10 23037, 74 n 739, 50 10, 11 705482 146593 , 00 10, 11 23526, 14 • PRECAST RISER SEGM NT 739, 60 11, 16 720172 147272 , 00 11, 16 24016, 84 " E WITH BASE 2.5 CONC. APRON 8 739, 70 12, 25 734939 147952 , 00 12, 25 24510, 16 6" THICK CONC. ENCLOSURE ( ) 50 739, 80 13, 38 749764 148633 , 00 13, 38 25005, 48 SHAPE BOTTOM TO POUR IN BASE TO 739, 90 14, 55 764667 149317 , 00 14, 55 25503, 40 740, 00 15, 74 779629 150001 , 00 15, 74 26003, 34 SLOPE INVERT COUNTERACT TO OUTLET BUOYANCY 740, 10 16, 96 794660 150678 , 00 16, 96 26505 56 740, 20 18, 21 809767 151357 , 00 18, 21 27010 38 DETENTION CONTROL STRUCTURE NOTE :ALL JOINTS BETWEEN PRECAST 10-YR STORM 740, 29 19, 35 823411 151969 , 00 19, 35 RISER SEGMENTS SHALL BE 27466, 34 Q 740, 30 19, 51 824933 152037 , 00 19, 51 27517, 22 STANDARD 4 x 4 JUNCTION BOX OR EQUIVALENT MADE WATER TIGHT WITH 740, 40 22, 14 840176 152719 , 00 22, 14 28027, 95 500 1000 1500 (PRIVATELY OWNED AND MAINTAINED) BUTYL RUBBER 0-RING o 2000 740, 50 25, 68 855478 153401 , 00 25, 68 28541, 57 PER NORTH CAROLINA DOT GASKETS. d 740, 60 29, 86 870849 154086 , 00 29, 86 29058, 10 NOT TO SCALE ~ w 740, 70 34, 55 886298 154772 , 00 34, 55 29577, 74 Time min 740, 80 39, 68 901805 155460 , 00 39, 68 30099, 80 0 740, 90 45, 19 917392 156149 , 00 45, 19 30624, 85 741, 00 51, 06 933037 156840 , 00 51, 06 31152, 24 741, 10 57, 25 948752 157524 , 00 57, 25 31682, 24 0 z 741, 20 63, 75 964544 158209 , 00 63, 75 32215, 15 741, 30 70, 52 980395 158896 , 00 70, 52 32750, 29 _ 741, 40 77, 55 996325 159584 , 00 77, 55 33288, 32 METAL GRATING (GALV. STEEL) 24"W X 24"H X 1/4" SOLID WELDED TO 1/4" SOLID STEEL PLATE STEEL PLATE BOLTED TO ~ 741, 50 84, 82 1012314 160274 , 00 84, 82 33828, 55 741, 60 92, 32 1028372 160965 , 00 92. 32 34371, 32 (3"x1" MAX. OPENING) STRUCTURE WITH SILICONE 741, 70 100, 04 1044509 161658 , 00 100, 04 34916, 95 ~ Q 741, 80 107, 97 1060706 162352 , 00 107 97 35464, 76 U " ° • ~ SILICONE SEALANT 0 741 ~ 90 116, 10 1076982 163048 , 00 116, 10 36015, 42 3" 18 3" ~ 742, 00 124, 41 1093317 163745 , 00 124, 41 36568, 25 250 ° ~ 3 1/2" 1" STORM DRAWDOWN HOLE p' Q olo O 'd o . Q ~ N N O U r k 1' STORM ROUTING SUMMARY Z~ ~ ~o INFLOW/OUTFLOW HYDRDGRAPH SUMMARY 200 X Q Peak Inflow = 87, 49 cfs at 715, 00 M I n CO M Peak Outflow = 1, 64 cfs at 917, 00 Min ° tr f.. \ U ¢wO~ Z Oco~n ~ ~ Q ~~i W o~n~n J ?JNI~ cC ~ CO Lf7 N I~ f~0. Z Q, QZ I I O Q O~ I I W Q~ Q oo ao N N N N U Peak Elevation = 735,31 ft r ~ ,d. ° ° V w~~n - Z MM • '.d s, ~ ,d. ~ ~ wO~oco ~daDao • ~ ~ o ~ a ~ W ~ M 00 co Peak Stora = 150 ge 149512 cu, ft . 'f e h d Z t!I^^ 3` NZOO ~ M O O _ 3 EDW 3 I N 2 r Y 0 w EDW #3 OUT 2 r 3" 3" 3" 3" Y 1-YR STORM ROUTING SUMMARY 30" INFLOW/OUTF 1 QQ LDW HYDRDGRAPH SUMMARY ELEVATION P _ eak I of t ow - X44, 34 cfs at 715, 00 M i n O Peak Dutf low = 3, 74 cfs at 1002, 00 r~ I n O O 50 M F-M Peak Elevation = 737,84 ft Peak Storage = 471346 cu, f t • » der ~ ~d~' 1/4 SOLID STEEL PLATE .Z a' .a• ~ ~ 'a ~ °aa ' , BOLTED TO STRUCTURE ~ ~ O o ~3 U U 2-YR STORM ROUTING SUMMARY ~ X Z Y~ x ~ vi ~ Q ~ vi X i J 00 O CEO INFLOW/OUTFLOW HYDRDGRAPH SUMMARY 500 1000 1500 2000 SS~~ ~ U' J_OfD ~ ~ O ~ ~ O f0 I~ co tf) co r~ i I P - eak Inflow - X97, 20 cfs at 715, 00 M I n META RA ~~~ZI I ~~w°I I L G TING (GALV. STEEL) Q v o o,~ ~ Q a, ~ W ~ ~ WELDED TO 1 /4" SOLID STEEL PLATE Q~ Z z ~ ~ I` ~ a~ N N 00 Lo U-) Lo N N Peak Outflow 4, 18 cfs at 1052.00 M i n °o^^ W o-Y- ce- (3"x1" MAX. OPENING) i5 Time min o¢ go 00 C RISER STRUCTURE FLOTATION CALCULATIONS 1 Q M ti~~ D N mom,, N N Pea = k Elevation 738.69 ft Peak Storage = 589468 cu,ft 0 1. WEIGHT OF WATER DISPLACED 6" CONCRETE BASE = Ah d • / / / _ (6.17 ft)(6.17 ft 0.67 ft = 25.51 ft3 •9 , \ \ 10-YR STORM ROUTING SUMMARY INFLOW/OUTFLOW HYDROGRAPH SUMMARY MANHOLE = Ah J J = (4.42 ft)(4.42 ft) (6.29 ft) Peak Inflow = 460,79 cfs at 715.00 rein = 122.88 ft3 LLJ D Peak Outflow = 19.31 cfs at 797,00 m i n r WHERE h = 10 YR. ELEV. - BMP INV. Peak Elevation = 740.29 ft Peak Storage = 822901 cu,ft = 740.29 - 734.00 SECTION = 6.29 ft NOTES 400-- TOT - W AL VOLUME DISPLACED = 25.51 + 122.88 - 148.39 1, ALTERNATIVE CAGE CONFIGURA .t TIONS ARE ACCEPTABLE AS LONG AS THE FLOW VELOCITY c THRU THE CAGE AT THE MAX. BMP POOL ELEV. IS LESS THAN 0.15 FPS. TOTAL WEIGHT OF WATER DISPLACED = (1.3)(148.39 ft3 )(62.4 Ib) = 12,037 lb 2. THIS DETAIL (METAL GRATING AND STEEL PLATE MAY BE APPLIED DIRECTLY AGAINST THE =MJ 1" DRAWDOWN OVER 2 TO 5 DAYS ft3 RISER. ~ r WHERE 1.3 = FACTOR OF SAFETY 3. FOR LARGER CAGES (HEIGHT > 5) A 3x2' HINGED GATE WITH LOCKING MECHANISM SHALL OUTLET COMPUTATION BE INSTALLED ON THE FRONT FACE OF THE CAGE. 0 > z J 11. WEIGHT OF CONCRETE 300 DETERMINE THE REQUIRED ORIFICE SIZE FOR EACH EXTENDED DETENTION FACILITY ^ VOL CONCRETE BASE = A h LLJ n 412 U = (6.17 ft)(6.17 ft) (0.67 ft) BMP RELEASE HOLE AND TRASH RACK DETAIL z I.. (A) 1- STORAGE REQUIREMENTS = 3 25.51 ft (a) 206,530 CF (SEE SHEET 5) 3 EDW #3 IN 10Yr N.T.S. Z Z 0 200-- (B) MAXIMUM HEAD (h) AT THE REQUIRED 1 STORAGE FROM LL E DW VOL MANHOLE WALLS = [A (OUTSIDE WALL) - A (INSIDE WALL)] x H #3 OUT 10Yr THE ELEVATION-STORAGE CURVE FOR THE FACILITY (b) 2.00 FT (736.00 - 734.00 = 4.83 4.83 - 4.0)(4 ) ( .0)] 8.29 = 60.76 ft3 (C) PEAK OUTFLOW RATE (Qp) AT THE MAXIMUM HEAD FOR A DRAWDOWN VOL, CONCRETE PLACED IN BOTTOM OF MANHOLE TIME OF 120 HRS [Qp = S/(1.0 x 3600 x 120 VOL. = a h I.. co 100 _ (4.0 ft)(4,0 ft) (2.0 ft ~ 0.0000116 x LINE (a) 206,530 - (c) 0.4781 CFS = 32.00 ft-1 C (D) REQUIRED ORIFICE AREA A A = Q p/(0.6 x 64.4 x h f" TOTAL VOL. CONCRETE = 25.51 + 60.76 + 32.00 = 118.27 ft3 co m LINE (c) 0.4781 [0.6 x (64.4 x LINE (b) 2.00 °'S] d 0.0702 TOTAL WEIGHT OF CONCRETE = (118.27 ft3) 150 lb) = 17,741 Ibs Z D ft3 W 0 CONCLUSION : 12,037 lb < 17,741 lb u (E) DIAMETER OF A CIRCULAR ORIFICE J THEREFORE RESISTANCE TO FLOTATION IS ACHIEVED. 500 000 1500 2000 2.0 x (LINE (d)0.0702_/ 3.1415927)°'S e 0.299 FT c = 3 1/2" DIA, ORIFICE Time min W u 2 E ? File No. NC Tax Map No. Jab No. 03-001 Cadd Dwg. File: DRAINAGE/03001SWMPOST1 SHEET: D16OF D20 ~ ~ ~ ~ U U U ~ = Z C _M - G 9' -SLOPE ASINI)ICAIED 011 PIAN5 ~ U J oc CONCRf.I£ pllA£NSIONS o'~ Q Q Y Q Y PIPE u Q1a = 222.o cis w ~ ~ - 1 _ ~ WN t OOT RI - bR1 - - T 111r ~ UA a A B C E F G w K u v10 = 11.36 FT/SEC ~ Q Q - _ - - --f - - - - - - - - - - I~'~i I~-~I N 2 I// 19 I/2' t5- 27 I/2.20. 2t-_e' 7 1 2 4' 4_ 6' n ro_ ~ ~ o 9 - - i~ I- ~ z 12 23' le' _ 31~ in= zi_" e' -9' i' i~ e" i7 12.' -_t. t-I"-- I I I I I I I I c coN( c u --•1- - ' PIPE PIPE 30' 24' 3B'- 20" 30• 8' 12• 1- 1' 8• 21 15" 5~ ~Ej]'' ~~,,t~,,II I_ _ _ --~-~I - -..I J ] I 1 -37" _ 30' /S'-~ 20" 44' E2 15' 6' 8' 8 11 18' 0~ N ~ N lLAl1 ~ ON( 1' 41' ]6 52' ]2' 12 IB' 6' 8' ~B" 31' 22" I I I I I~...nnwE1 I I I 7~ ..j ~ ~ - - • / 12 51 /2 59' ]2 48 12 21 6' B B 3/' 26"_ _ . , r I3• u 5 58 /B 66 ]1 i~ -13 2/ b' B 8' 29' ~ 5 I Y fi5' -S/' 73' ]2' S1" t2 27' 6' B' 8" 3B' e` -L. _ - - - - - - - OPTIONAL COtI51RUCIlON JOINT EOOTOIG _6' 72` 60' 80 36' fib 12 30' B 12 12 16 ]6 !F COtIST _ 1~ 6 r 2" 79 66 87 36' 77 12 3 B' 12 12 it /0` F _ _ _ _ _ f LEY8I1~d t 301 It usrD) / - _ _ _ _ - - - ----------(----------E•--------- - ('~,'n 7' 86' 72' 91' 3b" )B 12' 36' 8' 12' 12' Sfi' /3" T_ND E~ _ _ S ~4hT vlEw ~ _DOWELS IN ENDWALL WITH REINFORCED CONCRETE PIPE l PIPE SINGLE PIPE DOUBLE PIPE REINFORCING G - s ~ ~ _ M M ~ u bui- 'i3 IB' 1/' 70' T6 '7}, -'ill'' i3 Ta '~i In 74' -s~ -Ili ' ~~..8~ C F7AR5 :X.:%: :X: ~:X: :K Y rX •y ~K. ,K ~Y :X~ Y - I ~ ~ r M CZ ~ 'C" BAR 'D' BAR - - 1 S NO ELT NO LGI, E 1 i I U-) 12' . u of r _ _ 2 2 --T -T T .1. 2 7 2 15' 1 _ • / DIY_ 2 2 ! 3 1 i 5 2 2 ) ] 1 / ~5 _ 2' 0 1_II- ( I _ W~ T(li 105 9 9' ~I/ 11 19 55 - 65 ' 1 - - 18' ~ 1 ( - I _ _ _ 2 I 19 19 23 7i- gj 2'-i' / 2•-2' _ 1 ~ Q ~OWEl BAR "X" DOWELS IN ENDWALL WITIi CORRUGATED ~o' i 2'~9 / ? _e METAL PIPE 1. 5Cf Nt)IES ON S1A NO 20 IBO ? 1 1' '~-r'-~_-- 6 ~ ~ ~ ~ , O 20 -66 RCP ~ 0.50 DROP LL l PIPE 5NIGlt PY'( OOU81 E PIPE ~ - - N{ GARI IR1C Y -43ANS 0 1»~ i5 I }i' fb '7s ib.--• i ii }i' 70 7e' li' le' /2' 1 / i' 2' - I I 0 0.50X = 7320 • - - _ 2 fNNWA1IS >48" RfEFR /8' / /'-9' / 1'~B' I _c un 2 a ~ ~ ~ b ..a. ~ _ ~ ":i i ~ ~ Itl NI:111)I SlAllf)AR(1 ffl7E - / ~ ~ tL Oh _ _ ? i I 11 2 2 2 1 2 1 SI" ~ S'-3' 1 5',2' ~ I I _ ¢ yir, 2 2 ] i ~ 'S _ _j •j "j _j `s ~ S 11lNvlnl 1 S ~ ill I II 60" -1- -5 =9' 4 5'-8• I TUI 18S 9 11 II II 19 S] 61 r1 1 16 19 2) 85 PE 51AIE1) IIFSBir, - _ _ I I 1~._~~ - DIMENSIONS AND QUANTITIES 72' + 6'-9' / 6'-B' 1- ~ / a _ -~b1~[i8~1• lu N I N _SkICr€-PIPE _ OOU _"~iE~_-•-_r_pUUOR ~U USING [ORAUGATEU•1iE7i1~- ~ - • \ G ~ ~ i N c _ D ENS_IOr6 SINf.It_PIPE i - D - 11 - B_ C I I CU. YD N -L CU~YO jI "g ~ ~ ' fl) y - u` ~BIC PIPE ~ - - 1S' 1• I,.e. 2.•9.1 )/8 5' 6' 0731 2'•2' 7'-8' 0970 T-U' i~'-_ ~ I:O-Y(} - / ~ d 8' 2'-6' S' 0' O.S1S 1'-LIB' II' 076p 4- AR 12' OC "D" BARS Af 12' ON CErIFER Ib'' i' i' ib' i,_T 6'.i' b45e e'-ii i iii :i' i' i'-a - -'-io o3•i /e ' 2"i) 5 4 1' J B' I' i 011 w I-- "C' DABS Al t 2" ON C£NtER '}i'- i'=}' f'=i' i •b'2 t)? 6'~3' i5bd' ]'=3' n -S Zbib T-4'i'=ii i'-8' i".~ jQP VIEW / 0 J M fER ~ U ~ O SD' 1'-9 2'-s' 1'-7' 731 , REVISIONS 9'-2' 2115 /-J 13'-S' 2920 1'•J'2' 1' t •S' REVISIONS i U n ~ N o 3 O 8'_10' 1,75) 3''9' 1T•7 ?118 - J6. S'-]' 2'-0' S•..6• 11' 0" ]OU1 5'-0' 16'-0' 1086 1'-9'2'-5' S'. 7' 10'-4' 215b 1'-6- U'. III ?8 NO I>r1TE DESCRIPTION n0 DA7E DESCRIPTION - •-r- -r-. , - - - • - _ 11-8 1.110 5-1018'-6' 553/ S-T2 B 5'-II'11'--10 1.110 i'-3"1T-1' }/)4 - x 2 N _ 1 5/99 DELETE SP11511 PAD NUIE' ySIDE VIEW !B- 6-5- 3 -l- T_7.. - 11 SS]5 6'-11` ~I_tl ,7_12) S''9'1'_Tt 6'-0` 1!_1_ 1311 6r-0.19':~i~ 31113 ~ a N Q APPRC?VCO DATC ~ ~ ~ U~ V CIIAIt1,()TTI, - ~ ~ ~ ~ CONCRETE END hILC.ICLrNI1uRC, WALL FOR , I,ANU 1)I?V1;L(11'tt'tl?N'1' SINGLE CIIARLOTTI -114E;CKLENI)i1RG AND DOUBLE PIPE CUL~E SIANI)AIII}S 11 ~.Q, t~, 1ZEV, I,ANI) nf.,VELOI h4GN C CONCRETE UVINGWALL ti 15 THRU 4I3 PIPE •1 ~GWALL W{TH SPLASH PAD, _ ~ ~ ~ 1111"""""~~TrrrU / ` rrrui . n.1 rln STAN1)AI~DS O.17A eao°e° ~ ''r~~iq ~ v Mye ~ ~ 'eN ~ a ~ C E gM ~ o . . U evE ooh -o ~ ~ °e?Wv p ` J..' %yep Ce°~N: ~ ~ °e~ o° ~ ° eee ~ ~ e ~ yrrrrrlryp 111111W1 / ennunu~~1 50'-0~ SLOPE RIP RAP APRON ° 20 OX SLOPE GROUTED RIP RAP GENERAL NOTES: GENERAL NOTES: 1 ALT. CORNERS TO DE CHAMFERED 1" THE CONTRl~CTOR WILL BE: REOUIRED TO PLACE 2-#6 BARS "Y" IN THE TOP 1. ALL CORNERS TO DE CI-IaMFEREU t" IF CONCRETE, CONCRETE, OF A.LL ENUWA(.LS FOR PIPE CULVERTS 42" AND OVER WITH n MINIMUA4 3" - _ 2. THE CONTRACTUF WILL DE REQUIRED To F I_ACf_ 2--J Pt_ACf_ 2--~6 f3AflS "Y" IN THC TOP SCALE: 1"=10' COV#:R APJD A LFNGN{ 0( G" LESS THAN E:NDWAi1. OF ALL EI~JCiWAII FOR PIPE Cl1l.VERTS 42" AND OVE 12'~ AND OVER WI{II A MIfJiMI.1M 3~~ 3. FORMS ARE TO DL USCD FOR TEIE CO~!STRUCTIO(J OF TEIE BOTTOM SLAD. Cl)VER AI'JD A LENGTIi QF fi" l[.SS TIanN FNDWAIl. N FNDWAIl. 4 WALL TFIICKNESS (T) SITOWN IS NOT TO DE INTERPRETED TO - - z 0 I ~ RUCTION OF THE BOTTOM SI_AE3. ~ 3. FORra~ ARE TO BL USED TOR TEIE- CONSTRUCTION MEAN T1~IC THIChNCSl ACCEPTABLE, Bl1T !S USED 0111 Y a ItJ COMPUTING FIJDWALL QUANTITIES. 4 WALL. TIIICI(NESS (T `_;I-IOW(J I; NOl TO BE IIJTERPI _ RIP-RAP APRON DESIGN (PER CHAR/MECK STORMWATER DESIGN MANUAL): 1 BE ItJTERPRE Tf f) TO cn ) 1, MINIMUM TAILWATER CONDITIONS, do = 66° = 5.5' o 5. IF CONTRACTOR ELECTS TO USE CONSTRUCTION JOINT AT BOFI'OM OF PIPE, MEAN THE TI-JICKNESS ACCEPTABLE, DU1 IS USED 0 f IS USED ONLY THEREFORE, 0.5 * do = 2.75' BAR "X" (DOWELS) SHALL BE PLACED IN T(IE BASE AS SHOWN ON PLANS. IN COMPUTING ENDWALL QUAfJTITIES. 2. SINCE TW = 2.0', USE FIGURE 8-1 FOR MIN. TAILWATER CONDITIONS SPACING OF BARS TO BE APPROXIMATELY 12" CENTERS UNLESS ENGINEER 3. BY FIGURE 8-1, THE APRON LENGTH, La, AND MEDIAN z DIRECTS OTt-IERWISE• 5 IF CONTRACTOR ELECTS TO USE CONSTRUCTION J011 RUCTION JOIN( AT DOEfOM Of PIPE, STONE SIZE, d50, ARE 30' AND 1.0', RESPECTIVELY. AND POURS DASE SEPARATELY, THE TOP OF DASC 6. IF CONTRACTOR ELECTS TO IJSE CONSTRUCTJOtJ JOINT AT DOTTUM OE i'IPE, P OF DASC SHALL Di: lC~( ROUGIt 4. THE DOWNSTREAM APRON WIDTH EQUALS THE APRON LENGTH PLUS AND POURS BASE SEPARATELY, THE: TOP OE BASE SHALL DE LEFT f20U('I A L C IdCRETE TO BE: 3F~OU P.S.I OMP I THE PIPE DIAMETER: W = d + La = 5.5 + 30 = 35.5' ~ . I. 6. L 0 C RESS VE STf 'RESSIVE STRENGTH. 5. MAXIMUM RIPRAP DIAMETER IS 1.5 TIMES THE MEDIAN STONE SIZE: Q 7. Af_L CUNCRFTC TO BE 3600 F'.S.I COMPRESSIVE STRENGTH. 1.5*d50=1.5*1.0=1.5' 6. RIPRAP DEPTH = 1.5 (dmax) = 1.5 * 1.5 = 2.25' ~ REVISIONS _ _ REVISIONS _ Q M ru). DATE DfSCRIPTION NO OA[E _ DESCRIPTION O O Q O ° - - - I 8/0(1 REVISCO NOTES N 0 APPRt}VEU DATE f.. w ~ ~ ~ O ~ W ~ O APPROVED DATE ~ w~ x ~ F=0' x X _ CONCRETE ENDWALL F , r•- CIIARLOTTL 1~4T;CKI,ENI3IJRG Ofd , -~~jZ3 ~ ZZwo ~ Q l.~ CHARLOI`IE - IvILCKLENE~IIRG CONCRETt LAND DrVFLOPhIENT SINGLE AND DOUBLE PIPE CULVERT I' ! , JCRETt WIN w Q ~ GWALL ~ M <A S - I.ANI) DLVrI~OP11fi:NT STANI)ARI)S 11 n ._..~TwNO U W ¢~~N Z J ZONn ~~~_NU Z aZ I I O Q p~ I I n i 15 THRU 48 PIPE sTANDAItDS WITH SP>u 2o.16B W ~ ~aoooo U ~ NN TH SPLA ~ - SH PAD ~ ~ _M~, ?O.17B ~ ~ woOCn ~ ?~aooo N M 00 Z ~t-r`>M a V o~r~M O ~a~^ ~ Too 1 ~ 5 ~Ww ~ ~ow M NOj~S: 1 , I CEA55 DR MfDIAN SQE DF RIPRAP AND IENGTII. WIDTH AMD DEPTH OF APRON I ~ I I 10 AE DESICWED AY THE ENGINEER. I , 1 2 RCFER TO 1F$ CHARLOTTE IA(CKl(taAt1RL SiORkA w~tfa DESIGN ualuA( FOR I I I I RIPRAP APR(IW f1E51GPl STANDARDS I I T 1 RIPRAP SHO(IEO E%TEND UP ADTH SIDES OF THE APRON AND ARDUND 1HC FHO I I OF THE PIPE OR CULYERI AT IHE DISCNARCE OUIECI AT A MAXIMUM SIOPE Of I I p o I 2 I AtJD a HEIGHT NO1 LESS TITAN TWO 1IURD5 IIIE PIPE DIAMETER DR ~ CUL4ERI HEIGHT. r ~M ~0 M 1~ THERE SHAL(. 8E ND DvERF(oW FROM THE FND OF 111E APRON TO Th1E ' Q SURFACE OF THE RECEIVING CHANNfI. EHE AREA TO AE PAVED OR RIPRAPPEU ' N ~ SHA(t AE UNDERCUT SO THAT THE INVERT OF THE kPRON SltalL AE al TIIf oZ SAME GRADE (FL(1SI1) WITI I THE SIIR(ACf OF 111E Rf.CEIVINC CHANNEL IHE ~ ~ ~ ~ a0 C_a,9 APRON SHA(I HAVE A CIIIOFF OR I(lE WAII AE THE U(EWNSIRFAM FND. i = V U ~ _ _ U x Z Y~ X 5 THE WID1H OF' 111E END OF THE APROtJ SHALL AE fOOA( TO THE BOTTOM 4 ~ ~ Q X Q WIDNI pF THE RECEIVING CIIANNEE_ MA%IMUM TAPER 10 RCCEIVLNC, CIIAIJNFI. 5'I ~ ~ N J a ~uj ~ ~ H - _ J R ~iIJOO~o ~ c9JOCa O fi ALE SUAGRADE fUR STRt1CTURE 10 AE COMPACTf D TU 957. OR GREATER U 3 z ~ ~ m Z = oo ~ 0 1 ~ i- ~zorn ~ oo~ol. 'CD LO i n IE P(ACnTr, or rn( I H R R MPA I IN TI I Ft' IVflJ ~ Q V ~ o f` r ~ J~ 1 . El E 1005E 0 CO CFO E (.fE G ~ ~ O~MM Q NWU~~ 1 00 ~ n ~ N N GIArIrIEE SItALE NOT AE ALLOWED 1 . - Zz ~ a I N a ...~n on.nc no rno.,rc u, na unnnn.rtu ir.,.,r.n nc n,c .nnn., ~ I _ ~ O m m ~ S _ - op m m . wn•c ni n.c nvnu umnc n[,nnveun vinc. nr n"n I^ w_-.___.._..._...~.1 ' -<CJ cl, 64 C-4 WILL BE PERMITTED. M CV G] 44- N 9 DEPENDING ON SOIL CONDITIONS, WASHED STOIJE OR FILTER FABRIC PLAN WILL BE NECESSARY UNDER RIP RAP 1 10 ANY OISIURRED AREA FROM END OF APRON TO RECEIVING CIIANNEI Mll$1 HE STABILIZED NATURAL GRADE 1 1 1 I a RIP RAP 11 . ~I I I' 1 1 1 j NO ELATE DESCRIPTION NOTE:• - IAYER OF fIL1fR FABRIC I 1 5/99 NOTES 9 & 10 REMOVED WASHER SIUIIE FROM SECT 8-8 MINIMUM 1;-2/3 PIPE I1IAMEILR . 1 SECTION B-Q APPROVED DATE CHARLOTTE - MECKLENBURG 1 LAND DEVf;I,OI'MEN'I' ~ RIPRAP APRON AT PIPE SI NO T OUTLET S STANDARDS ...1 J 1 A TYPICAL RIPRAP AT OUTFALL PIPES ca LLJ I I 1 I ui >m I m J 0 Z W J J W File No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/030010UT XREF: DRAINAGE PLAN STATE/03001BASE SHEET: D17 OF D20 755 75C 745 740 735 730 725 755 750 745 740 735 730 725 IFIItil - IIID ' CROP. RETAINING ALL (—I EX. GRADE--,,,,,,,,. '1EI I K III= __— K�=rll 50-YR2-YRWSE : LI 1111- _ PERMANENT WSE = 732.00 - ' I 11= 11- 731.50 = — III. Iii = II i_I FE PROP. GRADE -1I III= _T III —I � EXTENDED DETENTION WETLAND #2 SECTION D -D SCALE: HOR. 1"=20' VER. 1"=5" 755 750 745 740 735 730 725 MINIMUM EXTENDED DETENTION WETLAND AREA DEPTH DISTRIBUTION REQUIRED: 1. SEDIMENT FOREBAY (20% OF PERMANENT POOL AREA) 2. HIGH MARSH (35% OF PERMANENT POOL AREA, 0" TO 9" DEEP) 3. LOW MARSH (35% OF PERMANENT POOL AREA, 9" TO 18" DEEP) ++++++ 4. MICROPOOL (10% OF PERMANENT POOL AREA) NOTE: EXTENDED DETENTION WETLANDS TO BE PRIVATELY OWNED AND MAINTAINED i i i i i - -'I 1=1 I' I III I' (- SCALE: HOR. 1"=50' —i VER. 1"=5" _------- 111 EX. GRADE 111 =1 --- -- _.. — _ 7 50 -YR WSE = 738.26 I11= III i t.2 -YR WSE = 736.52 ... ... ... ... z ... ... ... ... ... ...�_ ... ...PERMANENT WSE 732.00 ... ... ... ... ... ... _ _ _ _ — 1 _ — 731.50I 111 11, ,I 1 1, � I I __ _ I I—I I = _ _ = 111,;,111, ;III_„III►;,III, ►,111,;,111„,III, ,I i l _ _ _ TT I I I 11 -_— 729.00 PROP. = GRADE =ill --111= 'i_I= III ' I-111-1 I I=111-1 I I-1 I I-111-1 I I=1 I I-1 I I-111=1 ' =1111727.0011 I— ' EXTENDED DETENTION WETLAND #2 SECTION C -C SCALE: HOR. 1"=20' VER. 1"=5” 755 750 745 740 735 730 725 / LINE ' / / ___ \` 1'28 / \ RIP RAP APRON (FINE STONE) / - _ 7 0 WIDTH AT PIPE = 4.50 ,___ - ' - �� 30 132 -- WIDTH AT END = 10.5' LENGTH = 9' DEPTH = 9" 36 1VV 1 - `001 RIP RAP APRON MED. STONE __ ----------- 73 --- - WIDTH AT PIPE = 10.5' ----- / --- --- - ---- ----- WIDTH AT END = 31.5' LENGTH = 28' _ DEPTH =18 -I- '= 34 , V---- ____ ---- � �� _14. 73f/5-0-/ 25 i' ``\\ \\ `,1 i /— —_— 740 — — — — — — — -- \ 737 \ \ \\ ••`\`� •�l \\l� Vii. WETC2'AND Ot TO REMAIN � 731 + _ YJNDISTU,PE 1 _ _ 7 Q_ ' \' I / 7311 , 11 °'o 30 _--6 - -- -- 734 -'----_--- -- --_ 0 0 736 +72700 -- 738 _ _-'-=_ -- ' _ 7 _0 00 N 736 / X38 _--- �� ------------------- -- / `,---------------- -'----------------- 240 N � � � ---- 75 _� - ---- - --- _ --�'' --G- - cp 156, - ' r ------ - : rLAN VILW SCALE: 1"=20' File No. Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001 SEC XREF: DRAINAGE PLAN STATE/03001BASE PLANTING PLAN 'Table 7-2 Wedad Mots Seiaa** Nave 1 Comment rnmftuoa WIId1Be Vdw Notes Coon Name Form A Talarance Hight. Waterfowl trod Many wetland and mveml Pdtaadra v ftbda �wm FArgmt Yes up to 1 ft. High. B aria are . e� wood ducks Full dors to partneri shade SWharft kojolia Emergetu yes up to 1 ft. Moderate. Tubers and Aggressive colonizer Anowhead! Duck LU zoo �¢cGrn Z ¢Wooer Z��cooL0 ea QZ-� O a oo i i w U MM P0,01 =p seeds atm by ducks dlcus such as P. perfoliatum Asdnopoaat virgbd ws Perimeter Yea up to 3 in. High. Songbirds and Tolerant of flucau tg water Broomsedgc browsem Winter food levels do partial strode and cover Adm dlowratw Emergent Yea up to 1 R Moderate. Requires foil son 7yphe app. Pmagent Yea up to •1 it LAW. Except as cover Aggressive. May eliminate Cattail F.atergent yes up to 3 R Moderste for food but other species. volunteer. tt+eameent. Cww*hyltum DWOerswa Submergent ya yea Low food vdue. Good. Free Hosting SAV. Shade C000tail Perimeter yes rip to 3 in. hddnt and sheiter for towant. Rapid growth. switchgrata Sdt and invertebrates conditions. SdqWPwgeW Em "mt Yes up to 6 ht. High. Seeds. cover. Fan colonizer. Can tolerate Common Three -Square Waterfowl, aoosbuxis periods of dsyneas. Fall al. Lm m spp. Sub= wMl/ Yes yes High, Food for High metal removal DadmIted t I waterfowl, and lisp High awriertt. copper. Sarwus Canons Fmesgeru yes up to 1 it. Low, except for wood Rapid growth. Shade Umd's Tail Submergeat yea yes dtrdcs tolerant. Afadl ew aroscheutos Emergent yes up to 3 in. Low. Nectar. Full sun. Can tolerate Efibiwo fish and invertebrates. i WM*Fid wrldma Emergent Yea apt* 1 f< - Moderate. Ducks. Full am to partial shade Flokeralweed Nectar for bwterflies. Paaonoaeron peednoarr Strbmersent yea nes Bsuamey hislt. Removes heavy meds. Fond weed waterfowl, marsh and shorebirds. baarsla orysoides Emergent yea up to 3 in. High. Food and cover. I Fail sun although tolerant of Rice CI shade. PmAdes some PLANTING WILL BE SELECTED FROM PLANTS LISTED IN TABLE 2.2 ABOVE (SOURCE: STORMWATER BEST MANAGEMENT PRACTICES, NCDENR, APRIL 1999) BASED ON HYDROLOGICAL CONDITIONS AND AVAILABILITY. Use of EnF;ijlgln Hydric Soil Soil from the existing wetland areas that have permitted for impacts will be stripped and stored as feasible for utilization is lining the proposed wetland site. Otho topsoil a4lac wt to the wetlands may also be suitable. Using *= mstmg soils should hasten thea d mlopment of vegetated.cover and hydtic e6il conditions. This is also an excellent use of an unporta l natural resource. Many of the mcromm�awdod planted species cunvltly wast is tlne vicinity of the area to be irtilizcd for this function. Tile majority of the species in the wetlands ineiude Obligate (OBL) and Facultative Wet (FACW) vegetation. Herbaceous plant species present inlclude Sofa u (Juncus effusus), sedge (Caress spp.), Dude potato (Sagdaria latifoliia, Arrow arum (Paltandm mrgmmi Common Three - Square (Scirpus Pungens), Touch -=e not (impatiens capeusis), Smactweod (Polygonum spp-), and. others. Supplemental plantings will be selected from Table U.2 in the Storm water Best Management Practices, NCDENR, April, 1999 based on actual field conditions, if required. Being that the site is in the vicinity of oar wetlands and floodplain areas it is w0ectod that the area will benefit fi+orn the natural seed sources available. It is expected that herbaceous and scrub/shrub wetland species will rapidly volunteer m the area.. Eft Zone Schedule - iW MLgimd IMUS" NUN Common Name Size Notes RnsLesl5edges* Juncus dbmus Smooth Needle Rush 2 yr. peat pot 31 O/C. Scup. ameaicamts Common Three Square 2 yr. peat pot 31 O/C. Acoris calamus Sweet Flag 2 yr. peat pot T O/C. Shallow Wer Plants Peltandra virginica Arrow Arum 2 yr. peat pot 31 O/C. Sagitaria latifolia Duck Potato 2 yr. peat pot 31 O/C Saetnlrus cemns Lizard's Tail 2 yr. peat pot 3/ O/C. Nupbw luteum Spatterdock 2 yr. peat pot 3/ OIC. Planting shall be in naturalistic / random clumps to encourage diversity. Specific plant species, quan ities. mind size, which will be utilized for the mitigation sites will be depen dmt on availability. cost, tune of year m which planting occurs. Control structures such as sedimentation traps, siltation barriers, and/or at minimum silt fence will be utilized as necessary. &EMeSIM ft ffgdjMM ggd Cvw Ovy in Wdtmed AffiLa n Sites Zone 1- W__ ed"d rim in a nuantray ttabtmad am g 2 OU1t ReadEd no krill kMAN&M Daft TTM Ra April 1- Jul. 15 Red. Top Grass 7 lbs/acre Smartweed 20 lbs /acre Jul. 16 - Sept. 1 Temporary Crop Jap. Millet or Sorghum 20 lbs /acne (to be followed by permanent mentum) Sept 2 - Nov. 1 Smartweed 20 lbs /arae Red Top Grass 7 nwacre Nov. 1- March 31 Temporary Crop 40 ft /acme Wheat or Winter Rye (to be followed by permanent mbdum) The following species may be substituted: - Bidew connata (BMWs Tick) and other Bideds species - L«asia oWmides (Rice Cutgcass) - Panic um virattun (Switd wass) - PeWmdra virginica (Arrow Arum) Iastractioas 1) Seed in the dry period 2) use of a filler; such as sand to dilute the seed to ensure uniform ground coverage when broadcasting 3) tree and shrub planting diould be completed first before seeding 4) Pure live seed shall be specified and approved prior to planting. lierbac coos species may with a wetland seed mix which will result in a coverage of at least 100 stents per square meter upon germination. Substitutions may be permitted with approval. Other native grasses or annuals may be selected. No fescue will be used in wetland areas. Annual grasses shall be utilized for stabilization on surrounding slopes within Mitigation Area rather than perennials to allow natural succession. If a perennial is required for erosion control than a mixture small be selected that allows natural volunteering to occur. 0 z 1 1 111 shoreline stabilization Cwu OPP. Emergent yes up to 3 in. Hight. Waterfowl trod Many wetland and mveml SedAPS birds. UPIWA Schpw vlotaias Emergcttt yea up to 1 R Moderate. Good cover Full stat. Asgressive woody SoA•aaem Buhusb LU zoo �¢cGrn Z ¢Wooer Z��cooL0 ea QZ-� O a oo i i w U MM P0,01 =p and food. dlcus such as P. perfoliatum Polytmmum spp. Emtageat yes up to 1 IL High. Waterfowl, Fast cdonizer. Tolerant of Sstweed songbirds. Sada and tiacotatltts watt levels. cover. !wools Bmageat yes up to I ft. Moderate. Talawn wet or dry Sofa MOWt10” F.atergent yes up to 3 R Moderste for food but Feet aoioais i Tolemki of hish for ower Auctowas water bvels. PoLiam vergarum Perimeter yes rip to 3 in. High. Seeds. cover for Tolerates wet and dry switchgrata waterfowl and conditions. Asoma arlmuas Perimeter yes up to 3 in. taw. Toler mt of dryperiods. Not Sweet FIV a rapid cele tI Tobrates acidic conditions 8lodea ao1mdenris Submergent yes yea . Low. (food water oxygenator. Waterweed High awriertt. copper. ea mgtmae and chromium removal. Valisneria mneriaun Submergeat yea yes High. Food for Tolerant of murky water trod wild Celery waterfowi. Habitat for high nutrient loads. fish and invertebrates. Muria aqumiw Emergent yes up to t ft. High. Food for birds. Prefers full sun. Wild Rice Table from•. Drxiun of St.�++„w = Wetlands !K«ms: guide_hnes for creating diverse and effective mer wadants in the mid:►ir Saiarier PLANTING WILL BE SELECTED FROM PLANTS LISTED IN TABLE 2.2 ABOVE (SOURCE: STORMWATER BEST MANAGEMENT PRACTICES, NCDENR, APRIL 1999) BASED ON HYDROLOGICAL CONDITIONS AND AVAILABILITY. Use of EnF;ijlgln Hydric Soil Soil from the existing wetland areas that have permitted for impacts will be stripped and stored as feasible for utilization is lining the proposed wetland site. Otho topsoil a4lac wt to the wetlands may also be suitable. Using *= mstmg soils should hasten thea d mlopment of vegetated.cover and hydtic e6il conditions. This is also an excellent use of an unporta l natural resource. Many of the mcromm�awdod planted species cunvltly wast is tlne vicinity of the area to be irtilizcd for this function. Tile majority of the species in the wetlands ineiude Obligate (OBL) and Facultative Wet (FACW) vegetation. Herbaceous plant species present inlclude Sofa u (Juncus effusus), sedge (Caress spp.), Dude potato (Sagdaria latifoliia, Arrow arum (Paltandm mrgmmi Common Three - Square (Scirpus Pungens), Touch -=e not (impatiens capeusis), Smactweod (Polygonum spp-), and. others. Supplemental plantings will be selected from Table U.2 in the Storm water Best Management Practices, NCDENR, April, 1999 based on actual field conditions, if required. Being that the site is in the vicinity of oar wetlands and floodplain areas it is w0ectod that the area will benefit fi+orn the natural seed sources available. It is expected that herbaceous and scrub/shrub wetland species will rapidly volunteer m the area.. Eft Zone Schedule - iW MLgimd IMUS" NUN Common Name Size Notes RnsLesl5edges* Juncus dbmus Smooth Needle Rush 2 yr. peat pot 31 O/C. Scup. ameaicamts Common Three Square 2 yr. peat pot 31 O/C. Acoris calamus Sweet Flag 2 yr. peat pot T O/C. Shallow Wer Plants Peltandra virginica Arrow Arum 2 yr. peat pot 31 O/C. Sagitaria latifolia Duck Potato 2 yr. peat pot 31 O/C Saetnlrus cemns Lizard's Tail 2 yr. peat pot 3/ O/C. Nupbw luteum Spatterdock 2 yr. peat pot 3/ OIC. Planting shall be in naturalistic / random clumps to encourage diversity. Specific plant species, quan ities. mind size, which will be utilized for the mitigation sites will be depen dmt on availability. cost, tune of year m which planting occurs. Control structures such as sedimentation traps, siltation barriers, and/or at minimum silt fence will be utilized as necessary. &EMeSIM ft ffgdjMM ggd Cvw Ovy in Wdtmed AffiLa n Sites Zone 1- W__ ed"d rim in a nuantray ttabtmad am g 2 OU1t ReadEd no krill kMAN&M Daft TTM Ra April 1- Jul. 15 Red. Top Grass 7 lbs/acre Smartweed 20 lbs /acre Jul. 16 - Sept. 1 Temporary Crop Jap. Millet or Sorghum 20 lbs /acne (to be followed by permanent mentum) Sept 2 - Nov. 1 Smartweed 20 lbs /arae Red Top Grass 7 nwacre Nov. 1- March 31 Temporary Crop 40 ft /acme Wheat or Winter Rye (to be followed by permanent mbdum) The following species may be substituted: - Bidew connata (BMWs Tick) and other Bideds species - L«asia oWmides (Rice Cutgcass) - Panic um virattun (Switd wass) - PeWmdra virginica (Arrow Arum) Iastractioas 1) Seed in the dry period 2) use of a filler; such as sand to dilute the seed to ensure uniform ground coverage when broadcasting 3) tree and shrub planting diould be completed first before seeding 4) Pure live seed shall be specified and approved prior to planting. lierbac coos species may with a wetland seed mix which will result in a coverage of at least 100 stents per square meter upon germination. Substitutions may be permitted with approval. Other native grasses or annuals may be selected. No fescue will be used in wetland areas. Annual grasses shall be utilized for stabilization on surrounding slopes within Mitigation Area rather than perennials to allow natural succession. If a perennial is required for erosion control than a mixture small be selected that allows natural volunteering to occur. 0 z 1 1 111 11 1 111 co F- Q C% QM � N o O U O U I N N W X W t= 4D X 73 zW Z WOo LU zoo �¢cGrn Z ¢Wooer Z��cooL0 ea QZ-� O a oo i i w U MM P0,01 =p ,W1 NZ a0 ¢^OO,,O,.�O�O� v^^�W - O _, C o Z � M M O �_ 66 O 00 �' _� CL N� z U V) �J ((�,1c JOO 3=CIL)Co C C.9JOcD mLUZ — SDD� H �zorn =>oO co r\ Zhf` QI.�NN a� Q-,-- w W o25 ck� r4 - r-- Q M L4� C14 C-4 C N M C14 N # a z z =i .Q Lid O mi (D W Q ~ V W Q J tJ z — O O O > j Z CC Z Uj = �' W V ~ Z H U 0 W o Q O � � J 0 W m ZZ W o Lu z J W V W SHEET:D18 OF D20 780 780 775 I~ I U / - U / I I= Tab}e 2.2 wethutd Plants _L U U - 775 z C Z 770 _I I SelatgRe xese - 1= caatmoa r~elste comotetslyd tneer~tioa t+vuaare vulae t~ / I PtlentQre Form A Tdeteaee ~ silrgbrlc a Y - Auow satee Yes up b 1 R Hid Beau ate Fall eue b ' / I I_ P~ ~ / =1 ~jbtie esm wood dads V / I AnawLeadr Duck ~ Yes uP b 1 R Mteierne. Tubes oad ye ~ ~ II v 770 Paimeoer seedseetea ~ ~ 13rooewd~ r~ up to 3 is High. Sonrbinds ead Tdenmt of flucanting wue 0 765 ~ ~ browsers. wrote food _s O ~ I k ead eo ~ a ~a1 slide O ~ uP b I !R Requires itdl son ~ ~ i - Bush ~ I Tyra , 11= caLll~ ~ ap to l ft. Low. tleoept es ooveer , -I other Vdtmbe. I 765 7 ~ ~ i 3 ~ - Coomtll "~OCrsG°` ~ r~ Low food wlue. Good.. Froe ~ sAV. I_ ~a shade S 60 ~ ~ ~ ~ / ~ / hebRa end ehelta for tah~att. Repia growdt. a ~ . e~ne~dmvalbb~ 5 i~ / \ ~ \ LII~ sct?Prrp,~ ~ w b ti is sagas, caret, _ / \ r ~ ~ _ Cotomoo'lhtee,4gaae Pea wbairer. Cm bknte ¦ ~ V I- Wtrlerlowl, Pifiiods of dryads, FuU ~ ~ s ~ s ~ \ ~ ~ EX. GRADE ~ O ? $ o ~ ~ - 76 0 > ~ ~ High, Paod tar fah mtel tamevel 1= sawaas waafow and lbh N N 755 ~ ~ ~ ' ~,s ?'a ap b , !c Low, eseept 6or elpod SMde ~ ~ ti~'dt• ~ III Nfbfuasreoeeheaws t ~ tit. _ Ma:h ~ ~ aP b 1 b,. Lear, Nanr. Pull am. Cat brae o ~ ~ i ~ ~ P~ ~t ~ LL re uP b 1 A Moda>te. Dudts. PWI oat b peaiei shade p Natierfabtttterflies. ~ ~ = 755 rep I i Pom woad ~ r ingh. Rmtoves heavy ems. LL 750 Weterfavl, marsh gad 11.= ehonbirds. i ~ - ° ~ np b 3 ro. Hig6. Food end corer. F I Rios aU snit elthoug6 tolerant of Q a ~ i i shade. Provides sooty i ~ i ? ~ - tL ~ ~ I ~ I I 750 W = Cara app. ~ res a b 3 sabdiaarnt ~ ~ ~ ~ ~ / ~ 745 4 ~ P ~ lli3h, wtuafowl end Moor wetieod end eeveel o_ ng~~ ~ i i - scr?pstr wuitr yes up b t ft Moderate. Goad coves ~ I Soflaeto Ouhmh ~ Agglepive weedy V N ~i all N ` ~i end food. aliens arch Y P. ~ _i ra aP b 1 tt , wetaiow li Smutsreed 1, Pest abmeer. Tdae+n of seeds atd I atelsr hstreb, T ,..-----~y..,.. 745 w rro ap b 1 R a L;j 740 50-YR WSE = 741.50 -I Soti Rush Tdeata wst adry i p aaeditioas. ~ llr - . _ 1.1..0=YR WSE = 740,29 -I ~ ~t r'b upb3R Malenteforfoodbet .e,,, I = 3 M Fttstcolooiar.Tolereetof " I Pmrfcsortve?aatsnt Paimsea n b foroore. 0 _ w,uerlevels. - ra p 3m. I 3 HiSh•seeds,covefor Toleaessvetenddry glnlttttttttta/lye ICI. II ~ ,,._12-YR WSE = 738.69 f ~ _ I I waafowl end ataditioos. ~~iq q~4 -1 ~ _ 740 od~t Pmimper ~ ~ ee0°ooe ~~~~i yes np b 3 m. T \ ee ~Oe 735 - . ~ ~ -IIi Swat Fhg dtesnt ofd? PI~• Ha aaloaimr.T " 1 WSE = 735.31 11 "Pd deraa ~ I. ~ a~~tlar<, ~ ~I- ~ PERMANENT WSE 734.00 , weterwad Submaraa yes yes Low. water U ;tit co N a . aYB~ _ aW ~ ~o ~ „ 111' % y eti' C o ~ e 7 ~ 732.50 . ~ ~ ~ _ nraFmete end chromium Y e ~ o° kl ~p,, - _ _TiT_i ~ i_i i ~_i i ~=i ~ i_~ ~ 732.50 I' - i=iii=iii=iii..-% - - _ _ _ - - , • I Vdueerto s111triCmle 3 t >rmoval, :doe a°ee ` ~ I 735 W~ ubmet~p ra High. Food fot Tolersat of were end ~4 ~ °0° ~ ~ I I ~ i ~ ~ ~_i ~ ~ i_>7 -I I - _ - - -i ~ i_~ i i= - - = 732.50 730 - _730. oo I I. ~ ~ ~J ~ ~ ~ ~ ~ ~ ~ -I - - - - - - ~ _ _ _ _ _ i ~ s - X11- _ _ ~ III' ~ waafowt. Habitat 1~ ~~~~i = for btghttutrieottoeds, ~y~ d~~~ I !.I 11= _ _ _ _ - PROP. GRADE i i i_~ i i_i i i_i i i_i ~ i=i i i_Ti=iii J I 1=1 i I_I I I_I 11=1 I I_I 11=1 I I- I ~ ~ I_ 2koeia 5sh end invembretes, ruaiannntmtsn ~ ycs aP to 1 tt, fflglt. Food 6or birds. Prefers full sua _I I I_I I I. -1 Wild Rio .I 11= Table 6om• ' , ~ Sd>akr I- , _ a 0 - - 730 7 1I==- _ ~ ~ _ _ _ _ _ _ - - - I I PLANTING 4NLL BE SELECTED FROM PIANTS LISTED IN 25 TABLE 22 ABOVE (SOURCE STORMWATER I 1=1 I 1=1 I 1=III=1 ? _I I I~Ti-1 ~ I_I i I_I I I~ i ?_i = = _ _ BEST MANAGEMENT PRACTICES NCDE I i_I I I_I i i_I I I-I I I_I ~ NR, APRIL 1999) BASED ON HYDROLOGICAL CONDITI AVAILABILITY. ONS AND MINIMUM EXTENDED D ETENTION WETLAND AR _ EA DEPTH DISTRIBUTI ON REQUIRED; 7 25 Ilse of EYirtin¢ Hvdrtir Se'1 1. SEDIMENT FO REBAY (20~ OF PERM ANENT POOL AREA SCALE: H - OR. 1 -50 2. HIGH MARSH 35~ Sall from, the wetland axrsirng areas that have permitted for impacts will be stri ( OF PERM y VER, 1 - ANENT POOL AREA 0 5 TO 9 DEEP &asible far ppad and stared as t~lirzatlon >s htung the ptoposod wet>end site. Other ~ topeal adjaaatt to tho wetlands iiiiiii . y also be sortable. Using these ' ' soils should °~IB hasbe!a the cbvelopmaa of oov~ iiiiiii >>nd h so9 Y~ cxadmons. Tors is also an oxcxllodt use f ' ~ o as natuual resource. Many of ~nnalded planted speaes cunmily exist in the Z vunmdy of die aroa to be uttirzed £Or this ~ 3. LOW MARSH 35~ OF ( PERM ANENT POOL AREA 9 0°• T~ ~1~Y is the. ~ spocises wetlands include Obligate (OBI, and F a (~A ) acultattve Wet ~ TO 18 DEEP 1a ~ ~B~on• HabaaornlS lent U p spacres prleseat Include Softrush (Juncos eifusus), ; (Carex Duck w spP.), Potato (Sagitara labfolia, Arrow arurti? o (Poltandra vugmta), Common Three, Square (St~rpns P~s)~ Tauc~l-mo`nat ftte<ls ~capensts), Sm~artrveed (Poly ,and aux. S l~al sPP 4, MICROPOOL 10~ OF ( PERM itPp plantings will be selelitod fran Table II.2 in the St~aa water Best Managanmt PracArcos, NCDLNR, 1999 ANENT POOL AREA APN, based on actual field conditions if the the site is in the reclwred. Being o vlemity of otha wetlands and 8oodplaiu areas it is z benefit fi+~n the ~ that the area wlIl natural send sources available. It is that expeceed h~baceous and scrab/shrub species will rapidly vohuiteer in ~ arcs. N a , -i' u I/I~11 ter" irr' i - - r / ~ g ~ size ! ~ J ~ o M ~ Q ~ ~ Juncos Q o N 0 0 N ` _ _ . tRnsus Smooth Noodle Rush 2 31 N c - ~ yr• Peat pot OTC. ~P•us Common ~ ~ ~ Throe Squaro 01C. Z yr. Peet Pot 3 t- w k Ili Acoris r~lamus Sweet Flag 2 . ~ ~ N o \ yt•peatpar 3 aC. ~ w _o ~ M N N ii' ~ 1~ ,rte 'rr ~ ~ ~r % , / \ /i / ~ \ ~ . w~ x z Woo x ~ O X ~ ~ / ~llurv W~PLa>31t 7 ~ z w ~ 'Z- ~ w o ~ 1 ~ p ~ ~ ~ ~ W~-' o Z a cr, Ili \ ~ I Ptdtaudra V W cw'~~ill Z ZoJSO~n ~ \ _ ~ - ~ Z pr• Poet lwt 3' O/C. Z Q z I I O ~ ~ o N FF=J~Nt^ '1 \ - - ~ - ` ~ ~ hittfoh8 ill ~ ~ Q oo ao V (Oj U N N ~ ~ _ ~ - , 1~ Potato 2 yr. peat pot 3' aC. V w ~ ~ ~ - z -'h rn o ou \ ~ 1 ~ .~3 ~1t1U1VSt;ernnS Llzatd'STail 2 r C w ^.1 Q ~ -1~ ao z U M M JC= 00 ~ 1 ~ ~ . ~ ~ N 1 , yr• peatPot 3 OTC. z ~N M M V o~ M N p M M ! . v . ~ ~ _ " ~ ~ IItelTt[t $CdpC){ l ~ ¢ a^, ~ c~ W o 0 1 , ` „ Yt. ~ 1~ 3 ac. g w o r~ Ili w _ y' . • • ~ . 11 1 _ ~ I ~ I I I 1 I , ' I P shall be in random cl • h l ,III , , I I , I ~???s naturalistic l stn en . ' ~ I ~ , ~ I I I I I I III ~ I I , I I 'T'rop sou a dtverst 5 I ~ ty, pecrfic plant species, v , . ll , I I I I I I III , I, I quantities, and size, which will be utilized for the El ~c _ - , . I l , I ~ mi<iigauvn srt~s Rill be ~ ,,L y ~ \ 1 I ,l I ~1 I I I I~ I, I I ~Y•"""""` a~l4Ulltt~~, • ` / ~ ~ ~ -'C\`~\~~ ~ I `r I ( 1 , I 1 III I I I I cost; tune of year 2n which planting occurs. Control Stttletur,es t . ~ ~ , . > 1, ~ , I III I i I , I sihaation b such as sedunerrtation traps, , ~ . ~ \ ~ ~ r ~ I ~ I , ! I I I III arrler5, and/or at ffiitlllitUln 511t fence will be UtihZed aS .;a ~ , I f ~ ' , ~ , t III I I I I I [_~`1? ~ _ , ~ 1 1 ~ •a/: } 1 ~ .~I ,l~ /'I I I I I I ~ I I I i I r~' I\ , III I I I I I I I . O O 9~ , P ' / i r / / / l i \ \ ~ L; ~ . ~ ' III III I I I I I 6r CfJi o 0 i~,' . ~ I 'iII i I i ,yy ~ W ~ ~ O O M ~ ` I ~ ~ I t I I I I I i„ ~ ~pMp ~r7 W M M- O V' , _ - _ 1 , f ~ , V~~ P~ Q - - , ~ 11\ II I,\ ~ ~ jl`~'/.1 I I I I 1 I j I j er N'~ N~ ~ ~ 1 / ~ I LAY I I 1 .2 M V , / - k ~ \ ~ 1 I \ \ ~ ~ I rr t r 11 1 I I ~ I I I ~ ff^^ ' Q p z , 1 1 r - ~ , ~ l~ I I I I I ~ v/ Q a p'Z Q \ ~ . If/ - ~ _i !J , / I I I rll I I I , \ "Y'~u l `~W. l~ y}~~ /y~~ ~ U _U y ~ 2 , \ \ ~ r , ~ , / I , ( I I I II i ~ I iVR! Tap Ulp0.~ 7lbs/acre Z ~ W V O . V , . V , _ 1 IU ~ 1 V 1 t 111 I I i I 1 ~ 5 ~~yl x ~ Y~ Q Y X Q LQ~ I 11 f 1 I I1~ I, I I 20lbs~acre F-!n IQy Q J w \ ~ ,1 ,1 \ ,l r~ ` / I I I I I IIII I . f , i I S , 1 ~ , , 1 I,IrII I I I ~JO~ C JOO J (/j BOO ~ ~ O k 754' ~ r ' k , ~ \ ~ ~ 1 ~ \ ~ ~ r _ Sp-- I I I , I u 11'1• , Jul. i6 • = 00 0 _ O co i / " _ ~ x ; I I I I l' I I I I ; I I l Temporary CrtrP 5 rn tY1 oz = ao ~ C~I co 000 / ~ / I A / ~ I~.r ~ \ \ ~ ` ~ r r 34,_' I i i III Ar i I I I I I ~ ~ U ~ zo i I ~ ~ "'I p I I _ Q~.,~~„,,, O H ^ t~ Q F.. op o0 r i .----I36 I 1 Q , ~ I I I ~ I ~ \ OrsOrghUm 205/acre 1 t-WO0O Nr; LO U-,3 . y~' ~1¢ ~ ~ i 1 - , k,'' 1F' Y l..`\. 1~:7..1~._t_ ~ . ~ 1`_ , l !>A , / /,Jn % ! ,I / k! ' I ~ , ~ \ ~ ~ \ i ~ , t I I I III 111 i I I J ~ \ , ~a. , I . I I l I I I I I stn ~ fYlltlMVwet ti,., „e......_r. ~_y__, !'r ~ z C9 ^ ^ ~ $ en w N .a' •y ; z • ' y. • l i .i r ' •c,.X/ ~ ' ~ i ' P ' ~ ' ° y ;~"'r~, -T, y\ \ I Ilri!%^ \ 1' I/ l i V ~ ~i ! .11 k k r \ \ \ ' r.w--- I , I it 11 I I I I O- ~ \ r ' 1\ ~ I i I III I 1 ~ I I ~ I ~ O-lJJ WO~ppvpp~ SCPL \ ` , 1 + I _ _ \ fl ; I I ~~I I ( II I + I 2 - N n' °a ~~eF ? a , - I 742 - ? l l I I I r l l I I I l o Nm 20 l S~~ 1tbs Jacre M li-.?.,, N M N N N 11 ` , - I ' I I I rll I I I I I I I w 1 1 ' \ ` ' I + I l r j l I I I 1 1 Red Top Grw 7 RW Y ~ , I 11 ~ _..744 ~ \ I/ 1 ~r I I I I 1 I I 1 7 WYacre ? i / I ~~fl 111 r l l l NM. r r / J / /r 1 _ I 1 1 I k , Ala , , ` , , - _ - ? . , I I , , , I 1 l , 1 , 1- March 31 Ten1prely CMP 40 116 /aC[L° 1 ' \ _ 1+ 11 I I What orWW"P e 1~S ~Q'~ ? J ~y \W~ ~ ? \ ' , '1 sir ~ `7481 ~ \ ~ i t Ill ' l I ' I I I / be ft''y,~ y a 0 r l 1 l ~ ~ ~ J / l I .may ' a • o o / k y \ / . 1 1Y` `fir z k / " ' - _ - - err I I 1 I I _ by pmmamm MW=) / ~t`~ - i~' i 154- 11M fI r I I I o Species my be . or tj s• , - r k x / / - B1dOW cDnvMa { is Tick) and other Bl&.n r, spemes I + I I I -140Et8 OZYZM teS (Rice Cutp ) Ui 0 O WIN A. 742 x k k Al cro k, k x x J Pelumft virgWca (Arm w ntuil{fir, ` s~ ."?'w ) a r \ i•-~. \ 'Fag k 000 000 p 'kP - - \ . V",\ I I 1 k 4.0000 _ - 1 ` ,Il/` I' I 1 V 70 010 All, 1 01 0000 ~ ` ~ I - I ~ ? \I j i I A , ' I 1) Seed' th, W V ~ . ~ . I I in the, 1 dry period r ,.164 - ' " ?'~r 1\ 1 ` i Sand I 2) use of a filler, such as to to ((!lute the seed t0 eR.4ure \ , I b uniform ground ern+erage when roadcastiAg ' 3) trot and shrub planking should be completed first before seediag OC \ 1 ' I 4) Pure live seed shall be specified, and approved prior to Planting. O 09 t I > j Z I z ' ~ _ 1 -1 \ \ \ _ 1 it ~ \ \ , ~ 1 \ ~ 1 ~ - 0 1 \ \ ' 1 'i 1 0 q 0 ` `1 I I Iiba000US - 0 4 0 1 , , sp=es my with a 0 Wctland seed miX Wlrch will result in a e of at MEW. ~ - ~ - - \ ` II \111 + 11 a` / \ I ~ , / i~ /r \/r 0000 0 00 k . 1 . , I any . ~g least 10(1 ~ OWN Ad. Aty 0 0 o p° 0 1 I I I per square meter upon germination. Substitutions may be ~y p0pp0000 1 I natlVe Y Permitted with approval. Other _ 00000 po 1~= LLJ I 1 grasses or annuals may be selecxed. No fescue will be used in ~ ),r< , o 00 0 0 0 grasses shall be wetland areas. Amoral I utilized for stabilization on ~I surrounding slopes within Mitigation Area ra0.ier than ° o + 1( I perennials to allow natural 0 SOO succession. hf a perennial is required for erosion control than a I shall be selected that allows natural v mnchire z \ \ ` \ I 1 1 ~ \ 1 1 I ~ A Ol nng to occur. + ,1 11 1 I I ~r I PM 4 U 1'1 II 1,111'1,11 M O I \ ' ~ I ~ b I ~ 1111+' I / K f,ll~l~jl V i / 1 'l11 +11 III 1 AV ~ I I ~ ~ I, II 1 I 1, 1 I O I I I I i i l l l ~ r 1 1 1 1 1 1 1 1 I 11 I OC l~1D I , 1, I I 1 I I , r 1, I I I 1 i I I 1UU x- 1 I I I I III I I 1111 / 1 I I I III 01 / / I I I I I I 1 1 m \ I 1 1 1 1 1 1 1 I z I 1 1 1 1 1 1 , , I I 1 1 1 I W W PLAN VIEW 1 1 1 1 1 ~ r 1 1 1 I I I I I 1 1 I I I 1 1 J SCALE: 1"=50' File No. Tax Nap No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001 SEC2 XREF: DRAINAGE PLAN STATE/03001BASE V W W a SHEET:D19 OF D20 D20 1. Enter Site Data H ere "S. „ 2. Assi n Pro'ect Are rte Data and BMPs wor 9 J as Here ~ ksheets require user inputs. User BMP' re uires user in ut if the site ha s a BMP not listed on the "BMPs" sheet Assign project area to specific land uses in drainage areas (DA) a ~•:~~i3jN ~ ~ . indicate Hint: Assi ge areas (DA) associated with a s eci ' DEVELOPMENT PERFOR user input fields, gn land area to the Drainage Areas until all entries in the Model results are summarized ' in the Model Output worksheet. p ftc set of BMPs MANCE ANALYSIS all entries in the "Unassigned" category equal 0. Walter L. Phillips, Inc. ~ ~ Proptoi;'ed Land. Use/ Co ' ` . ver eta by D y A a rma~ 0 i by DA Northlake Village U U O U ~n • 5~~' ;fie ls~~. r Project Unassi eject Unassigned Craina a Areas DA associat t " ~ Areas ftz Area Mp' ~ , ~ Pervious Areas ~ ed wlth BMP sets. _ Is ft Area ft2 DA1 DA2 DA3 DA4 DA5 DA6 Land Use S U `$Cena , . ~ ~ ,r ~ ~ ummary o~ ' ' ontea on: ow Cro p :t r ~ t. , ~ ~ ~tlirB Total Site Area (acres Q Y 0 p r , 125.72 Pre-development impervious percentage 1,0°ti Y Q ~ 0 v,.. f 0 p s. Post~evelo me ~ p nt impervious rcenta ° Q < crest . , 38.0,725 0 el tae . ~ ; , . Wetland ~7 1,725. 0 ~ .,a : . r>> ~ 9e 75.4/0 ~ ulpte~,, ,659 p d,4 Use Scenano N "Meadow • ,659 p 0 Annual H drolo S m ame when multiple BMP configurations are be n t ' 'Q 0 for a given project. Save each sce 9 sated ,.atq~rn 924 373. o + Y 9Y u mary r nano as a separate flk. Im loos Areas 0 0 ~ 9`~?6.; ~ . 373. Existing Design Desi n •.•64.077 6 9 Lan a without BMPs with BMps ~ Resldentlal B Li htlndustrial drol ic~~~rcu Annual Surtace Runoff (inchestyr) 2.32 28.84 p$ f~ ~ . t of $i.~e° ~ , _ "o 0 Annuallnfiltration inches r 20'21 0 ( ty) 10.66 2.28 10.90 ~ Peirfd tots p i ,v . us Area 4~•` ~ O 1-year, 24-hour Storm Event Runoff I o u ,a~: Vo , , lume Summary ••:d 7 ~ O I D ~ " , : ` . ~ - Site bated in a zone ottror then Rural or Transitional Zone Chec 8ldawalk k on Soll Group Sums o a Totals OK G~mnrericlal d Hea I Y Storm Runoff Volume ~ ¦ Industrial ~ 12.0o Storm Event Runoff Volume acre•ft ?~~Rn~QT 980 5 8 x, • ~Parfri '1:bt 495 p - 7~?3 ~ 10.00 2,BAT 187 Other.....- iousArea 187 D Existing Landuse 0.582 X89; M ~ s: e.o0 Desi n without B ~ 0 g Ps 10.006 i° 6.00 ^ ;:tip ' x : ~ . ~ ' ~ : ~ 1'7.6,070 0 sld+iMrtaiik 89`7 X70 p , , ~ ~ On-Site St ~ Sto?m Wi , 16 0 ~ Feclllflaes Areas assigned in this table must sum to th • 1 ~ ~ a.oo ors a and Ta et c 16 p a . : ,fig. ; acre•ft LL e tai development site area. , • nd ' 'Pasture"has livestock, while "Meadow" m 2.00 ' ` 1-year, 24-hour BMP Stora a 14 o All•Other.BM . • , "Drive eaiw unmanaged. herbaceous cover without Ihreetock. ~ and Parking lob include curb and utb . 0 ~ 0' rr D.00 ~ .21 ' 'j: Tar get Storage 9.424 LL $8 0 LL Total Area 9 r "Rooftops" include canopies. 5' 6,363 D Existing Design Meets Goal? Yes 363 D 582626 Proposed Drains a Area D g (A) assignments match Pro c 499,198 2,607,842 1,786,397 Q p match Proposed Land Use. Annual Pollutant Load Summa Y ' • 3. Assi n BMPs Her ry p ~ N Existing Design Desi n ~ Z Q N 9 e nd tlSelaoya~; ' ck on a box to associate a BMP with a s 9 W ~ Land~e without gMps with BMPs ^ a' pacific DA. BMPs sl - b. Enter store a volum ' is DA. BMPs should serve the entire DA Sediment (tonlyr) g ~ ^ ~ 97.94 7.05 p co : ~ • .Exrlstiri. d Use 9 e (if applicable) of BMP inacre-ft, arao` ,sad Land -Use icre-ft, Total Phosphorus (Iblyr} 8.4 Z N ~ 157.6 39.7 O Total Nitrogen (Iblyr) 91 ~ o 4 p ~ ~~~G of Situ ' , ervrous Areas !K• .lairs • e 3480 1517 Fecal Coliform (count x 10 lyr) 631 a x BMPs lied to DA s r ° ,~~q yr. 5575 1220 < ~ ~ p~/ °~i '~Olld Al DA2 DA3 DA4 r- _ J v v ~ v . ~ Sediment Load Phosphorus Load I vii J i•Orel~t ~ ~ ~ ~I.~:Ii D ; oete0 M, ~ $6.8K ,:s son.. • ~ ` Nitrogen Load Fecal Coliform V N w ° 1:26 . .M , ' ~ { r 120.00 Load . ~ ~ " ~ ~ «S I 1 B0.0 4000 6000 >4~§'~,r y '3° ~ ' t ~ 100.00 ~ 180.0 3500 ! ~ 140.0 ~ ~ ~ 5000 auuuNgr n 0:1)% .hrQanden - Im rvlou:Anse ~~,,r , , "f8,ls' t v ~ ~ . - ' 80.00 ~ ~ 3000 I Ngiri v - I 120.0 , ~ . ~ ~ ~ ~ i 2500 i 4000 ,,,q ResldenGal d Enhanoe<i~~iraesSwaie ht Indus a~w ; x teal . 60.00 ~ 100.0 ~ : poi 44__ . , ~ + ~ 0 ti' Mil r C ~ 80.0 I 2000 3000 v o0 40.00 ~ 1500 ~ M eY ~ .,p ,.,r , , , , , . , • 60.0 ~ ~ 2000 ~ ° J o N = i . _ 40.0 1000 ` Q p ^ r n Ile. ~o ; , i ~ aendefllNsld i3MP uentfal etith: ` seal ned BMPs ~:r a •r, a ~ ~ a o - i IPs r 20.00 I ~ o U y ~ a e 20.0 1000 ed N o 00"3 ~o ~Btoad , ct?5L Ford Bldfsr . .;Sideyvaik - . ~ ;r fl.fl'k:...= -Enter Buffer WidthforeachDAvvithfore ' ~ 0.00 500 Z ° o° .,4 - er (feel v , Commerlcial & Hea Industrial •a0!~ • ;ted=Staffer //feet ; ' ` y / 0 0 'rd~` 00 ercent of r~ - '•7 ' ' , 7; ~ y Ss SN ~ „ ~ , Da~Ytithin:treat „ . a.~ , . • entzorn 3 3r Storngif Volume for 1 2 r etreatment zone p~ ~r . , ~ ~ ,yV r 55.~9G Develo ed Area Sed' '''err ,t; ~ Y, ~ ul tt.0% a ~ ~ ° n; 4h atorm,~acre-ft), ' • , , ~ r~r ~ ~ ~ . '17:5 • ' :Q;d~ - Notes: brass channels do not receive rem P tment Target Summa Ur a~ rY rueunounem ~!ioUS /~t'98 1 ~ :d - • , r ~ +~8.$°h'' oval credit when used in combmahon with water ~ T ~ ~ ?0,0le ~ Forested Buffers cannot be used with Wet Ponds D mbinahon with water quad d ewales. ~ Cord ~ b ry pa tson to Target Sediment i~yo" ry DetenBon Basins, or Stornw _ ~ ~n Basins, or Storrnwafsrwe~tlrds the same d 120.00 Loading and Target (tonlyr} ~ ra'"ape a Sfdewalk Stone WaterMa '1~ 100.00 I ° ~ Design without BMPs 97.32 na ems `OQ'~ Kk nt Facpltles °"~'r - 'PnndlWstiahdh~- Y ~ 80.00 Design with BMPs 6.66 +Atl~ther BMPs exce' t~f ~ - ~ B'Y° ` j Tar etLoadin fifer ~ ~ ~ , 0.0~~ • ' ~ ~OrB°lo' 60.00 ~ g 9 14,80 Meets Goal? Yes ~~'otai r ~ s , ~ 476~3s BMP P s;; ~.~oo,~~ • r=~•~fia ~ ~ . ertormance • r.. , ~ b~ 40.00 ~'otal Site 1m - : CoveE ~ ~ ' ~ ; 20.00 Additional sediment from ,irii . ; loos ,f ~a A~ Cotrer••wlttlin~!eireloped Area... ~ Net Reductions 0 ~ undeveloped areas removed p . C ,``~4j4% - ervrous areas are assumed to be 1% impervious 1=1oVict~Ornerted to inflttration b B z „De MPs - . . DA1 DA2 No B j by BMPs (for reference only); p,23 DA3 DA4 MPs with BMPs Target veloped Area" refers to that portion of the ro'ect Totehatitro p 1 not covered by Row Crops, Pasture, Forest, or Meadow x 33 ~O 5.5% TvMi PJwa onus. 71.~1fi ; 71.~V,, 19.96 Check on New Land TE& ~ . . se Cover 38~1K ~ 'A ~ 6$:276 23;Y'6 BMPs Meet Sediment Load Red ' action and Runoff Control Targets Existin L g and Use Data OK i'er~l''~oliform ' ~ - ~8+1~. ,-X5.0°la 98.1X 87.1 "Target addresses loadin from Bevel Z '9T•0°ti 70.0% 97.0% 9 oPed portion of site. 2.8%0 Developed portion is lawn, BMP area, and impervious area, o Undeveloped portion is forest, meadow, wetland, pasture, and row I sop and uses. a #y: . r "~ed~ U Proposed Land Use Data ~!ll.ut-;, ~K W O e~ ~o $MPs ":.r x, .fit. O Z Q U O h a ..:...r....'e::." ~~y M Q I r% ~ ~ ~ .:.~r.,.•.•..: '~i..e.rr.•.~r..~ • • iiriaiiiiir ~ 1~8Y IY , ~ ~ n O U ~ ~ ~ :lr~r . .••~•r: V w No h 0 ruuurrirrrnrl,• ~ • ~ W X W X •rrrr/~rrurrrrrn • . . ~ O_ ~ Z Z' W O a 0 'O x yr rrnr• . rr. • • • • it - uurr•J~• rririiir;'•• ~ ZW O (a- _ 4ri rrl...:rf/rrrrrrrrrl•, W ~jZ°p p~ iV z ~Q~D I'7 0 0 - :urrrurrrrnrrr." ~ Q -In In W ~ tl' CO CO lrrrrrrrrrrrrrrrM • U W °0 ~ Z O co ~n iii urrrrrrrrrrr%••' tL) C.9 Lf)lf') .J ZJN Q cp r~ jcCpLo yrrrrrrrrrrrruM! Z O JO Z . rurrrrr„.(rrrrr. QZ I I Q I I \ \ ' ;iirrrrrrr ~rrrrr. O ~a0000 U UVNN O ~R': iru, r tr 1~ .M ~ - ? •'!iiiriir••::i iii.'.: WOCOO JtL'°000 ? nrrr~ vrrrr . . JNN r=0 ? rrrrrrrrrr Z W~ M P'~ ~ O Z M M j O ~ ? .ri~ir••.: , i, , ~i. ? i. ~ ~ ; M e~ ? IOKteIIY _ ? V ~ V ~ ~ ,~a O O O KO~ ~ ~ ~ r7 ~ O / \ 7 I ~ er a ~ O d- I 1 (n ~ O Q I H ~ o~ U V C II r X Z Y~ x ~ Q II to J 4" cac J V1 r` II r ~ Ja°o~c ` C~J00 r tr H. ~ZOI rn ~ ~ ooco~ Eo°o~ to 1~ ' I Q V OOM1+~j Q W H~jOJO'0 ~ 1 I JL~ pppp ~pp-ppv-. Nm I f'! Z J LU 0 W ~ J H r Lin J 0 J 4 gr C 1 ~ co D J LU 0 W .I DRAINAGE AREA MAP FOR SITE EVALUAl File No. Tax Map No. Job No. _ 03-001 Cadd Dwg, Flle; DRAINAGE/03001SET SCALE: 1"=200 XREF: DRAINAGE PLAN STATE 03001BASE W SHEETT20 OF D20 0 1 DWQ Project No. 021204 DWQ Project No. 021204 DWQ Project No. 021204 DIVISION OF WATER QUALITY • BIORETENTION AREA WORKSHEET BIORETENTION AND NATURAL FLOODPLAIN AREA OPERATION AND MAINTENANCE AGREEMENT ~ ~ DIVISION OF WATER QUALITY • BIORETENTION AREA WORKSHEET DIVISION OF WATER QUALITY • BIORETENTIQN AREA WORKSHEET FOR NORTHLAKE VILLAGE F' 0 I. PROJECT INFORMATION (please complete the }ollowing informatan): U U Project Name : NORTHLAKE VILLAGE I. PROJECT INFORMATION (please complete the following information): U I. PROJECT INFORMATION (please complete the following information): = Z Contact Person: JILL OLINGER Project Name : NORTHLAKE VILLAGE Phone Number { 703) 532-6163 Contaci Person: JILL OLINGER For projects with multiple basins, specfy which basin this worksheet applies to: Phone Number. (7031532-6163 Project Name NORTHLAKE VILLAGE Maintenance activities shall be performed as follows: - U For projects with muftipte basins, specify which basin this worksheet applies to: Contact Person: JILL OUN(~R Phone Number 703 532-6163 ~ 1 Immediately after completion of Bioretention Area planting• Q a Permanent Pool Elevation 747.80 ft. (elevation of the orifice irwert out) For projects with multiple basins, specify which basin this worksheet applies to. W a Permanent Pool Elevation 770.10 ft (elevation of the orifice irnert out} Temporary Pool Elevation 14$.50 `i (elevation of the outlet structure invert in' a. Plant material shall be watered at the end of each da for fourteen consecutive da s. ~ Permanent Pool Eievatror VARIES ft. (elevation of the orifice ~rnert out Y y ~ Q ~ 1 Temporary Pool Elevation 770.30 ft. (elevation of the outlet structure invert in) ~ U o Temporary Pool Elevation VARIES ft. {elevation of the pullet structure invert in} 2 When ever needed; ~ 0 Bioretention Surface Area 2,536 sq. ft. Bioretention Surface Area 2,148 sq. ft. D ~ Drainage Area 1.37 ac. {on-site and off-site drain a to the basin Z O Bioretention Surface Area 3,842 sq. ft. a Remulch any void areas. N Impervious Area ~ ) Drainage Area 1.16 ac. (on-site and off-site drama a io the basin 1.11 ac (on•site and off•site drains a to the basin g ) Rational C Coefficient g ) Impevous Area 0.99 ac. (on•site and off-site drama a to the basin Draina a Area N 9 1.96 ac. (on-site and off-site drainage to the basin} 0.85 Rational C C ~ g ) Size % 5 % ° oefficient 0.85 Impervious Area 1.67 ac. (on-site and off-site drainage to the basin) b. Treat all diseased trees and shrubs, ~ fA ~ Q o Rational C Coefficient Q85 Z ~ M O (erther 5% rn wlsand under drain or 1 k in w1o) Size 5 ° ~ ° (either 5 h m wlsand under drarn or 7 h m w1o) W N Size % 5 (either 5~ in wlsand under drain or l°k in wfo} c Replace any deficient stakes or wires Z ~ ~ N InleiVelocity 1.9 fPs SE Z ~ ~ Inlet flow d th E DETAILED INLET VELOCITY Inlet Velocity 2.3 fps SEE DETAILED INLET VELOCITY eP 0.97 in CALCULATION Inlet flow Inlet Velocity 0.8 fps SEE DETAILED INLET VELOCITY 3. One year after completion of Bioretention area planting: 5 0 M O Depth to Ground Water 17,3 S, THIS SHEET, depth 1.04 in CALCULATIONS, THIS SHEET. ft. Depth io Ground Water 8.30 Planting Soil Infiltration Rate 1.5 in.mr. (the soil layer down to 4 feet ft. 4. o nlet ow depth 0.34 in CALCULATIONS, THIS SHEET. O M f~lanting Soil Infiltration Rate 1.5 in,(hr. the sal la er down to 4 feet De th to Ground Wat r m = p e 7.90 ft. a. Re ove stakes and wires during the spring. ~ ~ U ~~s t` In-Situ Soil Infiltration Rale 1.00 in.lhr ( y ) (the soil layer below 4 feet or below the sand bed) to-Situ Soil Infiltration Rate 1.02 in.lhr. (the soil layer below 4 feet or below the sand bed) Planting Soil infiltration Rate 1.5 in.lhr. (the soil layer down to 4 feet) ~ n. O ~ ~ o M I Situ Sad InfdVation Rate 1.00 in.lhr. (the soil layer below 4 feet or below the sand bed) = r ~ 4, After every srgnrfrcant runoff produong rainfall event and at least monthly. U II. REQUIRED ITEMS CHECKLIST II. REQUIRED ITEMS CHECKLIST ~ ~ cW0 initial in the space provided to indicate the following design requirements have been met and su ortin documentation is attached. 1f 1!. REQUIRED ITEMS CHECKLIST a. Ins ct the Bror tendon and Natural Flo lain Ar r invent accumulation er sr n ~ N pe a odp easfo sea o o , ~ J M ~ Pp 9 a Initial m the space provided to ind~cafe the follovng design requirements have been met ands rtin documentation is attached. f requirement has not been met, attach an explanation of why. At a minimum, a complete sformwafer mono emenf Ian submittal includes r ~ g 1 a trash accumulation, vegetated cover, overall general condition and repair as necessary. O o ached. !f a Initial in the space provided to md~cate the following design requirements have been met and supportin documentation is attached. !f a Z u- D a worksheet for each BMP, dent n calculations tans ands g p equrrement has not been met, attach an explanation of why. At a minimum, a complete stormwater mans emenf tan submittal includes 9 , p pecrf~ations sho?nng all BMPs and outet structure details, a detailed a worksheet for each BMP, desr n calculations tans and g p ~ Q ~ g 5 Eve three months: al includes requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes ry drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal arks a will resul in g , P specrfrcatans showing all BMPs and outlet structure details, a detailed p 9 t a request for drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal cka a will result in a r uesi f r W a detailed a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet swciure details, a detailed O additional information and will substantially delay final review and approval of the project. ~ g ~ o additional information and will substantially delay final review and approval of the project. equesi for drainage plan and a fully executed operation and maintenance agreement. An inc a. Inspect and repair the collectionfdischarge systems (i,e, inlets, outfalls, pipes, nprap, etc.) ~ Z U' omplete submittal package vnll result in a request for ~ licanfs Initials additional information and will substantially delay final review and approval of the project. to maintain proper functioning. c~ 0 No vertical sand bed is r sed licanfs Initials W Q t0 licants Initials 6. Eve six months, Z p ~o No vertical sand bed is r sed 0 The bioretention area is at least 40 feet by 15 fee± p °p° 0 The bioretention area is at least 40 feet by 15 feet, ry Y r No vertical sand bed is proposed 0 ~ N 0 Sheet flow is provided at inlet. 0 Water fabled this rester than 6 feet, 0 Sheet flow is provided at inlet. 0 The bioretenton area is at least 40 feet by 15 feet. a. Remove accumulated sediment and debris from the Plun a Pool and repair andlor replant ~ Z Q g ~ W ~ ~ g D Water tabled this rester than 6 feet. Minimum of 6' ponding is provided. ~ g D Sheet flow is provided at inlet, any down gradient erosion, 0 c~ Minimum of 6 ponding is provided. The ponded area will draw down in less Phan 4 days. 0 Water table depth is greater than 6 feet. U ^ O O Mirnmum of 6" ponding is provided. b Remove and replace all dead and diseased vegetation considered beyond treatment in the ? U N The ponded area will draw down in less Than 4 days. Planting soil infiliraton race is greater than 0.52 inlhr. The ponded area will draw down in less than 4 days. Bioretention areas Plants are to be replaced only from March 15 to Apri13D and from Planting soil infiitraUon rate is greater Than 0.52 iNhr. ~0 The in-situ soil infilUation rate is greater than 0.2 iNhr. . 0 The in•sifu soil infiltration rate is greaser than 0.2 iNhr. Planting soil infiltration rate is greater Shan 0.52 iNhr. October 1 to November 3D. Z Q A planting plan with species and densities is provided. A planting fan with species and densities is provided. . d The in•situ sail infiltration rate is greater than 0.2 iNhr w Z L; j Mulch layer is specified in plans. Mulch layer is specified in plans. .l D Planting soil meets minimum soil spec cations (NCDENR Stormwater Best Mana emenf A planting plan with species and densities is provided. 7. Once a year. J Q U 9 .JD Planting soil meets minimum soil specifications (NCDENR Stormwater Best Mana emenf Practices Manual, April 1999) 9 ulch layer is specified in plans. D Planting soil meets minimum soil specifications (NCDENR Stormwater Besi Management a During the spring months, add mulch as necessary. l/7 Practices Manual, April 1999) J~ Plan details for the bioretention area provided. Practices Manual, April 1999) JQ Plan details for the bioretention area provided. Plan details for the inlet and outlet are provided. JQ Plan details for the bioretenton area provided. 8. Every two or three years. puuunuuwgy Plan details for the inlet and outlet are provided. An operation and maintenance agreement signed and notarized by the responsible party is provided. Rn operation and maintenance agreement signed and notarized by the responsible party is provided. Plan details for the inlet and outlet are provided. 0°0 Please nose that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains An operation and maintenance a reement si ned and notari a. Remove old mulch layer before applying new mulch layer. ~P °po 9 9 zed by the responsible party rs provided. ~tp vo° Please note that underdrains beneath the planting soil are acceptable in the Piedrant and Mountains 0° 4 °°~N Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains h ~ °0 ~ t ~a -Q° ~ W° - cU° oDt~1 Z°7°- lacknowledge and agree by my signature below that I am responsible for the performance of the seven eW N ~ g ~ maintenance procedures listt~d above, I agree to notlty DWQ of any problems with the system or prior to any S °3 °o°(~ DWQ Project No. 021204 chan es to the s stem or responsible art . ~r °e~ °o 9 Y P Y , cy °o OWO Project No. 021204 D212D4 Print Dennis Hecht a ent for and on behalf of TRG-Charlotte TLC i~~~~9 , DWQ Proiecl No. name: _ 9 ,,,~~~rr~ r[`„~~~~~ DIVISION OF WATER QUALITY • 610RETENTION AREA WORKSHEET DIVISION OF WATER QUALITY • BIORETENTION AREA WORKSHEET anneal Title' Ruthotized Signatory, Vice President, Legal Services & Partnership DIVISION OF WATER QUALITY • BIORETENTION AREA WORKSHEET A dm i n i s t r a t i o n I. PROJECT INFORMATION (please cor~lete the following information) Address:__.~_20o E._ Lon~Lake Road, Suite 300 Bloomfield H' ] s M:[ 48304 k-' a Project Name . NORTHLAKE 41LLAGE i. PRO,~CTlNFORMATION (please complete the following irtfortnation): Project Name : NORTHLAKE VILLAGE Contact Person: Jlll. OUNGER Phone Numbee 703 532-6163 248.258-68 0 ° I. PROJECT INFORMATION (please complete the following information}: Phone: Contact Person: JILL OLINGER Phone Number. 703 532-6163 For projects with multiple basins, specfly which basin this worksheet allies la I Protect Name : NORTHLAKE VILLAGE 5r natur : ~ ~ ~ ~ For projects with multiple basins, specfy which basin this worksheet applies to: Contact Person: JILL OLINGER Ph g one Number. 17031532-6163 Date. For projects with multiple posies, specify which basin this worksheet applies to: ~ Permanent Pool Elevation 762.60 ft. (elevation of the orfice invert out Tem ra Pool Elev n ) Permanent Pool Elevation 762.10 ft. elevation of the orfce irn po ry a6o 762.80 ff. (elevation of the outlet structure invert in ( ert out) Temporary Pool Elevation 76230 ft. elevation of the outlet structure Inv 'n Permanent Pool Elevation 759.60 ft. {elevation of the orifice irnert out} Note: The legally responsib?e party should not be a homeowners association unless more than 50% of the ( ert i ) Temporary Pool Elevation 759.80 ft. {elevation of the outlet structure invert in) lots have been sold and a resident of the subdivision has been named the president. Bioretention Surface Area 1,574 sq, ft, Bioretention Surface Area 833 sq. ft. Drainage Area 0.85 ac. (on•site and off•site drainage to the basin Im rvious Area ) Drainage Area 045 ac. (on-site and of(-site drains a to the basin Bioretention Surface Area 1541 , ft, 1, 0.c en ~ t'eh c , a Nota Public for the State of ~ti o, , . sq ry Pe 0.12 ac. (on•site and off•site drainage to the basin) Im two g ) Rational C Coefficient 0.85 pe us Area 0.38 ac. (on-site and off-site drainage to the basin) Drainage Area 0.73 ac. (on-site and off•site drainage to the basin) Count of 1 s TACO {nn~ d0 hereb certif that ~ e c 1. Y - Y Y e. n. S~' . Impervious Area 0,62 ac. (on•site and off•site drainage to the basin) Size % 5 ° . Rational C Coefficient 0.85 (either 5 ~ m wlsand under drain or 796 in w1o) Size % 5 % o ° Rational C Coefficient 0.85 personally appeared before me this ag day of u u , a0o3 ,and acknowledge the due (either 5 /o m wlsand under drain or 7 b in wb) Size 5 °k {either 5°~ in wlsand under drain or 7°k in wlo} execution of the for pin wet wetland detention basin maintenance r uirements. Witness m hand and Inlet velocity 1.8 fps SEE DETAILED INLET VELOCITY 9 9 [ ) eQ y Inlet flow depth 1.20 in CALCULAl10NS, THIS SHEET. Inlet Velocity 20 fps SEE DETAILED INLET VELOCITY Inlet flow depth 0.90 in CALCULAl10NS, THIS SHEET. Inlet Velocity 2.0 f s official seal, o P SEE DETAILED INLET VELOCITY F Depth to Ground Wafer 12.10 ft. Planting Soil Infiltration Rate 1.5 in.lhr. the 'I Depth to Ground Water 8.50 ff. Inlef flow depth 0.79 in o_ ( sot layer down to 4 feet) Planting Soil InfilUation Rate 1.5 in. Jhr. (the sod layer down to 4 feet) In-Situ Soil Infiilfra6on Rafe 1.50 ~ in.mc (the soil layer below 4 feet or below the sand bed Depth to Groundwater g,10 ft CALCULATIONS, THIS SHEET. W lanting Soil Infiltration Rate 1.5 in.lhr. (the soil layer down to 4 feet} o In-Situ Soil InfilUation Raie 1.05 in.lhc (the soil la er below 4 feet or below the son Y d bed) In-Situ Soil Infiltration Rafe 0.95 in.mr. (the soil layer below 4 feet or below the sand bedj II. REQUIRED ITEMS CHECKLIST I!. REQUIRED ITEMS CHECKLIST Initial in the space provided to indicate the following design requirements have Been met and supportin documentation is attached. ff a II. REQUIRED ITEMS CHECKLIST o z 9 Irn6al in the space provided to indicate the following design requirements have been met and su rtin documentation is attar requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater man emenf Ian submittal includes ppo 9 tied. 1f a red. if a Initial in the space provided to indicate the followin desi n r uirements have been me a worksheet for each BMP, deli n calculations tans ands ~ ~ p requirement has not been met, attach an axpiana6on of why. At a minimum, a complete stormwater mans emenf Ian submittal incl 9 , p pecificatrons showing all BMPs and outlet structure details, a detailed a vrorksheet for each BMP, lest n calculations tans g p udes 9 9 e9 f and supporting documentation rs attached. lfa includes requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal cka a wilt result i g . P and specrficatons showing all BMPs and outlet structure details, a detailed Pa 9 n a request for drainage plan and a fully executed operation and maintenance agreement. An incomplete submttal cka a will result in a r detailed a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet sinicture details, a detailed N additional information and will substantially delay final review and approval of the project. a i Pa 9 equest for ddif onal information and ~wll substantially delay final review and approval of the project guest for drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal parka a will result in a r uest for SEAL 9 eq Q licanfs Initials additional information and will substantially delay final review and approval of the project, wty commission expires 0 No vertical sand bed is r sed licanfs Irdtials p opo No vertical sand bed is r sed U licants Initials KAAEN a O 0 The bioretention area is at Ieas140 feet by 15 feet, p °po 0 The bioretention area is at least 40 feet by 15 feet. 0 Sheet flow is provided at inlet. No vertical sand bed rs proposed pp~p~ ~ 0 Water table de th is rester than 6 feet. 0 Sheet flow is provided at inlet. .IO The bioretenton area is at least 40 feet by 15 feel. klMq M Oddend Co., M Q M p g D Water table d this realer than 6 feel. Minimum of 6" ponding is provided. ~ g M~ t~nattrwon ~ t?12Trl001 Q o ° D Sheet flow is provided at inlet. o N ~ 0 Water cable depth is greater than 6 feet. o The ponded area will draw down in less than 4 da s. Minimum of 6 ponding is provided. Y The ponded area will draw down m less than 4 da s. V ~ ~ Minimum of 6" ponding is provided. Z ~ ~ Planting soil infiltration rate is greater than 0.52 inlhr. Y Planting soil infiltration rate is greaser than 0.52 iNhr. U ~ N~ The ponded area will draw down rn less than 4 days. W .o . /D The in-situ soil infilVation rate is greater than 0.2 iNhr. . 0 The in-situ soil infiltration rate is greater than 0.2 inlhr. ~W~ X ~ ~0, X Planting soil inflltra6on rate is greater than 0.52 rnlrr. e Z W a x A planting plan with species and densities is provided. A planting plan vnth species and densities is provided. Mulch layer is specified in plans. 7~ZW ~ Z~woo The in•situ sail infiltration rate is greater than 0.2 iNhr. Z ~ ~ ~ a a Mulch layer is specified in plans. JO Planting soil meets minimum soil specifications (NCDENR Stomiwater Best Mana ment A planting plan with species and densities is rovided. W ~ ~ n ~ tO p U aWOO~ Z Zo o~ Mulch layer is specified in plans. Z a Q Z vi ~ O Q o o N 9e JD Planting soil meets minimum soil specifications (NCDENR Stortnwater 8esf Mana emenf Practices Manual, April 1999) g W U w~¢~a^o fA U vvMrNi D Wanting sal meets minimum soil specificatons (NCDENR Stonnwater Best Management - Z I Practices Manual, April 1999) JO Plan details for the bioretention area provided. JQ Plan details for the bioretention area provided. Practices Manual, rig 1999 N ° `O `O Z ~ ~ ~ 00 AP } G ~ F- rM Q U ~ N.~ h Plan details for the inlet and outlet are provided. Plan details for the inlet and outlet are provided. Plan details for the bioretenton area provided Q ~ ~ ~ ~ M ~Q~~ 3 °woo An operation and maintenance agreement signed and notarized by the responsible party is provided. An operation and maintenance agreement signed and notarized by the responsible party is provided. J W w N ~ ~.~i Plan details for the inlet and outlet are provided. Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains pl _ Ar operation and maintenance agreement signed and notarized by the responsible parry is provided, ease note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains PieaS° note te'a`.:"~~a"'li;~ "~c ~:~'I"ce•` ,~'k j}~^r;^r^y SGy: 2fe 3CCP~ii2DiE IG p~Q h^,6gTFJr~, Zri~ tJIUJfru'1R~S O ~ DWQ Project No. 021204 DWQ Project No. 021204 O O~ M BIO RETENTION INLET VELOCITY CALCULA ~ o TIONS ~ _ _ _ Q DIVISION OF WATER QUALITY • BIORETENTION AREA WORKSHEET DIVI510N OF WATER QUALITY • BIORETENTION AREA WORKSHEET PLANTED STRIP VELOCITY REDUCTION .Q ~ Q oc? I. PROJECT INFORMATION (please corr~iete the followirxJ information): Project Name : NORTHLAKE VILLAGE I. PROJECT INFORMATION (please conplete the following information): x Contact Person: JILL OLJNGER Project Name : NORIHLAKE VILLAGE BIO AREA #1 BIO ~ ~ X W ~ x AREA #2 _ 'BIO AREA #3 BIO AREA #4 y r;;~~ a Z a a - r + - * + r a,' ~ ~ N L~ Q J rj Lam. Phone Number: 1 703 1 532-6163 Contact Person: JILL OLINGER For projects with multiple basins, specify which basin Phis worksheet applies to: Phone Number 17031532-6163 Q-c f A Q-c I A Q=c I A Q=c`I'A ~ _ ~ o ~ ~ o 0 0 to for projects wish multiple basins, spec which basin this worksheet a li tlY pp es to. _ 6 Q=0.85"' .03 inlhr * 1.37,4 = - + * _ `~°'d ~ U ~ _ °o ~ Z J o (7 ) { c) 8.18 cfs Q 0.85 {7,03 rn/hr} (0.85Ac) 5.08 .,fs Q-0.85 {7.03 rn/hr} (1.06Ac)-6.33 cfs Q=0.85 .03 rn/hr' 1.16Ac -6. r., FA t, OC ~ V avement -4.2 s - _ Z ~ ~ r` I Permanent Pool Elevation 767.50 ft. (elevation of the onhce ~rncri out} Permanent Pool Elevation 761.60 ft, (P ) ip V(pavement -4.2 s V avemen - - ) ~ (p t) 5.9 fps V{pavement}-5.0 fps ~ Q ~ ~ M M Q 7Q~ N w - - 2O ~ Z~f~f~ ~ `y' WNN V{grass strip)-2.4 fps Vfarass stria)=2.3 fns 1/(nracc ctrinle~ 7 fi,e vr,,..,~„ a lJ~/A~. S r! s LO N Temnnrarv Pnnl Flavafinn 7FA M a r_~_.._. . _ feleVahOm Of the bra irnrarf m rtt - - tC nvauon ur me ouuet structure invert in) Temporary Pool Elevation 161.80 ft. (elevation of the outlet structure invert in V IOJJ Jlll -L.V I `S LIE; 0 O-.ppppCo OO ~ 0- Q' Odd d Od ch V(reduction)=1.8 fps V(reduction)=11.9 fps V(n=duction)=2.7 fps V(reduction)=2.2 fps Q~ d N N ~ M N N v- Bioretention Surface Area 2,038 sq. ft, N `r Bioretention Surface Area 944 sq. ff. Drainage Area 1.06 ac. (on-site and off-site drainage to the basin 1310 AREA #5 BIO AREA #6 1310 AREA #7 Im ious Area ) Drainage Area 0.51 ac. (on-site and off-site drains a to the perv 0.90 ac. (on-site and off-site drainage to the basin) Impervious A g ) BIO AREA #8 Q=c*I*A Q=c*I*A Q=c*I*A Rational C Coefficient 0,85 Area 0.43 ac. (on-site and off site drainage to the basin) Rational C Coefficient 0.85 Q=c I A Q=0.85*(7.03 in/hr)*(0.45Ac)=2.69 cfs Q=0.85*(7.03 inlhr)* 0.51Ac =3,05 cfs Q=0.85* .03 in/hr)*(1.96Ac= 11.71 cis Q- -0.85 * _ Size % 5 % (either 5% in wlsand under drain or 7% in wfo ° ° ) Size /0 5 k (either 5°/° in wlsand under drain or 7% ( ) (7 ) (7.03 m/hr)(0.73Ac)4.36 cfs V(pavement =4.5 s V avement)=4 - Z in w/o) Inlet velocity 2.1 fps SEE DETAILED I Inlet SEE DET fP (p .4 fps V(pavement)-2.4 fps V(avement)=4.1 fps P V(grass step)=2.5 fps V(grass step)=2.4 fps V(grass strip)=1.3 fps V(srass stfiP)=2.5 Inlet flow depth 1,62 INLET VELOCITY Velocity 1.9 fps AHED INLET VELOCITY fps J V(reduction)=2.0 fps V(reduction)=2.0 fps V(reduction)=1.1 fps V(reduction)=1.6 fps Uj 0 in CALCULATIONS, THIS SHEET. Inlet flow depth 1,04 CALCULATIONS, THIS SHEET. Depth to Ground Water 8,20 ft. in Planting Soil Infiltration Rate 1.5 in./hr. (thDepth to Ground Water 8.04 ft. e soil layer down to 4 feet) Planting Soil Infiltration Rate 1.5 in./hr. (the soil layer down to 4 feet) In-Situ Soil Infiltration Rate 1.02 in./hr. (the soil layer below 4 feet or below the sand bed In-Situ Sod Infiltration Rate 1.05 in./hr. (the sotl layer below 4 feet or below the sand bed) INLET DEFLECTOR VELOCITY REDUCTION II. REQUIRED ITEMS CHECKLIST For all BIO Retention Areas Inlet defelctors were assumed to reduce velocity by II, REQUIRED ITEMS CHECKLIST Initial in the space provided to indicate the following design requirements have been met and supportin documentation is attached. If 9 a Initial in the space provided to indicate the following design requirements have been met and supportin documentation is attached. 0.5 feet per second. This assumption is based on field experience and is a conservative estimate. requirement has not been met, attach an explanation of why. At a minimum, a complete stomtwater management plan submittal includes re g if a .d. if a I- a worksheet for each BMP, desr n calculations tans andspecifications p qurrement has not been met, attach an explanation of why. At a minimum, a complete stormwater mans ement Ian submittal includes g n p showing all BMPs and outlet structure details, a detailed a worksheet for each BMP, desi n calculations lans and g p drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal acka a will result in a r g , p specifications showing all BMPs and outlet structure details, a detailed dudes p 9 equest for drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal acka a will result in a rue additional information and will substantially delay final review and approval of the project. P 9 eq st for letailed INLET VELOCITY CALCULATIONS pest for additional information and will substantially delay final review and approval of the project. Applicants Initials li 0 No vertical sand bed is cants Initials J BIO AREA #1 BI O AREA #2 BI O AREA #3 BI O AREA #4 W proposed No vertical sand bed is r sed 0 The bioretention area is at least 40 feet by 15 feet. p 4 The bioretention area is at le t least 40 feet by 15 feel. 0 Sheet flow is provided at inlet. V(pavement 4.2 s Vavem ) ent ( 4.2 s V(pavement) p ) 5.9 s V(pavement) 5.0 s UJ 0 Water fabledepth is rester than 6 feet ~ Sheet flow is provided at inlet. g 0 Water tabledepth is greater than 6 feel. V lant strip reduction 1.8 s V I _ p ) ant stn reduction 1.9 s V (plant p ) lant strip reduction Minimum of 6' ponding is provided. TO- The ponded area will draw down in less than 4 days. Minimum of 6" ponding is provided. 2.7 s V(pIan ) t strip reduction 2.2 fps) V(inlet deflector reduction 0.5 s V inl The ponded area will draw down in less than 4 tla s. et deflector reduction ( ( 05 s V ) inl ( et deflector reduction s V(mle ( t (0.5 deflector reduction (0.5 s Planting soil infiltration rate is greater than 0.52 in/hr. y Planting soil infiltration rate is greater than 0.52 in/hr. The in-situ soil infiltration rate is greater than 0.2 in/hr. Expected Inlet Velocity 1.9 fps Expected Inlet Velocity 1.8 fps The in-situ soli infiltration tale is greater than 02 irJhr. 1/6 A planting plan with species and densities is provided. A Expected Inlet Velocity 2.7 fp s Expected Inlet Velocity - 2.3 fps (:0 0 planting plan with species and densities is provided. Mulch layer is specified in plans. Mulch layer is specified in plans. .1 D Planting soil meets minimum soil specifications (NCDENR Stormwater Best Mana ement BIO AREA #5 BIO AREA #6 BIO AREA #7 BIO AREA #8 ~ Practices Manual April 1999 g JD Planting soil meets minimum soil specifications (NCDENR Stormwater Best Mana ement ) Practices Manual April 1999,~ g V a~ement 4.5 s V J0 Plan details for the bioretention area provided. JQ Plan details for the bioretention area provided. 116 Plan details for the inlet and outlet are provided. p pavement 4.4 s V avement p ) 2.4 s V(pavement) 4.1 s Plan details for the inlet and outlet are provided. An operation and maintenance agreement signed and notarized by the responsible party is provided. Vplant strip reduction 0 s V (2. 0 ) lant strip reduction 2. (p s V Iant strip ( reduction 1.1 _ An operation and maintenance agreement signed and notarized by the responsible party is provided. ) s V pIan p ) t strip reduction) (1.6 s V (inlet deflector reduction (0.5 s V i Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains Please note that underdrams beneath the planting soil are acceptable in the Piedmont and Mountains nlet deflector reduction 0.5 fps) V (inlet deflector reduction (0.5 s V inl et deflector reduction (0.5 fps) CC M .Expected Inlet Velocity = 2.0 fps' s Expected - Inlet Veloci 1.9 fps Z p ty= Expected Inlet Veloci 0.8 fps ty_ Expected Inlet Velocity - 2.0 fps I W PER THE NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES STORMWATER BEST MANAGEMENT PRACTICES MANUAL, 4, SECTION 5, IT IS RECOMMENDED THAT THE MAXIMUM INFLOW SHEET FLOW VELOCITY FOR PLANTED um Z i J GROUND COVER BE 3 FEET PER SECOND. THE HYDRAULIC CALCULATIONS ABOVE INDICATE THAT INLET VELOCITIES FOR ALL BIO RETENTION AREAS ON SITE WILL BE LESS THAN 3 FPS. THEREFORE, WE FEEL THAT THE BIO RETENTION AREAS SHOWN ON THIS I PLAN HAVE BEEN DESIGNED TO ACCEPTABLE STANDARDS. W File No. NC Tax Map No, Job No. 03-001 Cadd Dwg. File: DRAIN AGE/03001BMP3 SHEET: D7AOF D20 ~ ~ H 0 6' V U U ~ ~ i 1 / ~ ~ ~ P = z ~ - / s ~ U ~ 1 ~ ~ ~ Y ® Q Q / / ; ~ ~ / - Q \ \ od ~ ( i ~ ~ ~ oQ` ~ Gy Q ~ P--i~-1 ~ U o J S ~ ~ Q D 1 0--1 _ t!? ~ G ~ 0 o st 53 ~ o--t-~ ' ~ 0 C a+~ Z o ~ ~ \ N / ~ ~ ~ ~P ~ F~ F° ~ .Q Q Q ~c - ' W Z ~ 6 i 6 ~ a~ 1 a Z / 4 WIDE OPENi~ J IN CURB (TYP. 4 WIDE OPENING 531 Z ~ IN CURB (TYP.) \ S TO BE CENTERf TO BE CENTERED ~'----o ~ ON PAVEMENT ~ o~„a ON PAVEMENT STRIPE o• _ ~ TOP=752.60 ~ ¦ ~ U b BOTTOM=752.10 Q~ ~ ~ ~ r~ M i Q~ O ~ ~ o ~ o~ r = c~ o~ U 55~ 0 ~ r 55~ o~ N 5 ~ i ~ C7 a , Q o 0 4 WIDE D ENING P \ ~ ~ 56Q • IN CURB TYP.) Cg` 56Q • ~ 0~ .Q 6 LL / ~ _ ~ Z TOP=754.80 , _ QQ W • OBOTTOM=754.30 W Q ~ ~ 57~ Z ~ ~ ~ r ~ ~ ~G 1 o'h ~ Z~ oC N 6' ~ 0 o`' ~ Z a ~ pt: W ~ ~ ~P 57 ~ 00' 0 ^ co QQ SCALE: 1 5 p ~0 ~ ~ \ 57~ O ^ ~ N i.i o / +Q 57 6 / / N ~ h TOP=756.70 ~ / OBOTTOM=756.20 A P=756.70 G a J ITTOM=756.20 ~ Q 1 J . 5S Q U P ) 1 ~ ~ 59- 9 F 6' ~ + Q 6 / 6 +Q .Y t y 599 ~ i ~ Q~` 0000 ~ y ~P e °°°e ~ 59 , o y ~ M°e°7r 0• y e~ ~ "0 c y ~~a NW° ~ - 8.10 OP- • ^ T `7.~ e ey n Z°o 7 2 °UiuN1~N N o° Q~' $ BOTTOM= 58.20 Q~ Q . 0 6 0 ~ 61 y y i °eW O ~ 0° ^ ~ so / ~ 4 WI OPENING ' ''i ~ eves ~C 0. G ~ 6Q 6 iN CUR TYP.) y i~~~ H ss 8 ~ ~ c, TO BE CE RED y ~~''y~~„ ~t~``~~~~ y ~ ~ BIORETENTION ~7 ~ - ON PAVEME STRIP y y / $ . • TOP=760.60 ~ / ~ 1 61 ~ BOTTOM=760.10 ~ y y y ~yJ , ~ ~Q ~ y y Q ~ W O 6`~. ~ \ \ y y y 6' ~ 1~ \ y y y y 629 y y y y y .V i ~ q o o°~ y y - \ y ~ o. y y J \ y y y 0 J / Q~ \ \ y y ` y ~L 3Z 1 Q \ Y y y y W 63 p~ y y O.Ap y y .Y y y / i G ~ • o ~ W y' Q y y / ~ TOP=762.50 ~ BOTTOM=762.00 X y y y' / 6 - P / ~ y `L y G W y y y y y ~ ~ ~ F ~ ~ ~ y y y z •Q \ y 'Y V y y a ~ 4' W~9E ENING ~ 5 / ~ 8 65- y y y y O~ y y U y y fn 6 IN CUR TYP. / ~ - TO BE TER D 4' WIDE OPENING y y y y ~ Q ~ IN CURS TYP. ON PAVEM NT STRIPE ( ) i ~ ~ 64 \ y y W / ~ y' y y 10 0 / J~ y y J. y ~O 0 y y +t' y / ~ TOP=764. y y y ~ 5 BOTTOM=76 90 ~ ~ 65 y ~ y y z / ~ \ 66$ y J' y y y y d' y y / 788 ~ o~° o`•' y y `1' y y y y y y y yTOPt759.60 Q , lX Q 3 y y y y y BOTTOM=759.10 674 ~ ~ \ y y' y y / ` / o ~ o. ~ y~ y y y y y \ y y y y y ~ d' r ® TOP=76 20 0~ ~ ~ / •to _ c, Q BOTTOM- 65.70 ~ y y y I M / Q 4 $ ~ ~ 68- 67 P \ ,y Q 00 O y y .Y ~ ~ F 4 .l' y y W ~ ~ N N o y y y y y U ~ rM O f ` •Y y y y Z V VJ NN Q ~ \ y y y `Y W -p X 6 y y Y Y y ~ w~ x Y pJ X ~~3 a ZZ}~wo ~ `Y y y y ~ ZW {1 V ~'O Q tt_ nF 6 y y W >Z~O~ Li. Z, N~fD I'7 ~ -U7 ~ W f0 CD V M CD VC - +Q \ 0 y y y y U W a~ln In Z J ZONI~ Z Z ~ ~ ~ y y y W Q ~QOOOJ C~ OU~MNN7 N TOP=768. ~ ~ \ y ~Y 'L U (yJ M g • 5 BOTTOM=7 7.50 \ = 9.80 ~ Wo~~ ~ ?~ooo~ y y y YARD INLET Tr~tOAT 15 Z ~~MM V oZ M v-. M O 69- ~ y y y FOR EMERGENCY OVERFLOW ~ Q n ~j N o 0 / y ~ '-Ww ~ ~Ow M ~ / 7 ~ \ 70~ ~ ~ ~ 71 ~ > ~ ~ ~ O ~ ~ M 4' WIDE OPENING IN CURB TYP. 72 ~ ( ) _ \ SCALE: 1 "=10' ~ ~ Q N~ ~ 0_ TO BE CENTERED 5TOP-769.70 71- BOTTOM=169.20 ~ MENT STRIPE ON PAVE \ -z o z C? a0 C? ~ ~ U U zg w_ x ,C 73Q 4 WIDE OP Q ~ 3" OF 12 MONTHS AGED MULCH ~ a Z a ~ X Q L.~ IN CURB (TYP.) LL Q J N L~ v PONDED = cn~o~ ~ o Joo O D CD 1~ ~ 6' ~ 6 PROP. CURB Z=~~ 6' ~ BIORETEN110N SIZING COMPUTATIONS WATER DEPTH U ~ - 6 f o~ o ter` O lf) D r - NON BIORETE Tl ~7 ~ * _ « TOP EL.=759.60 Q ~ o M M Q a I I 0 00 LC) TOP=771.80 DRAINAGE AREA A C FACTOR 5% (WITH SAND BED) _ ,_j ~_I I z c~ I'~ o Q ~ N N ~ - - __'i'_' _ _ _,.,~,.__,~.•:-:•.--~-r_:ji III II.-~~~~ ~ pO~~.~,~ W Wei-v-. V N -rte - Rnrrc~=~n 3 ~ i ~ -SIZE OF BIORETENTION AREA QnTrnu n _7ro t~~ ~ r~ ~ _ . _ _ . _ _ . _ . ~ z a ci nor _ tzi ,..0000 „ oa o0 Q 00 LL- rL- Li w Mer.i 9=1 O N m S --I- N 14 i b' 0.73 AC ~ 0.85 * 0.05 = 0.031 AC. - 1,351 SF U- PLANTING SOIL= -d I I= t 6" 1/4" PEA GRAVEL J V BIORETENTION #7 - =~1 MIN. SAND BED'<,,.,.`~; ASTM C-33i_I (USE CONC. SAND) u c o`'o 0 0 0 N PLANTING COVER COMPUTATIONS o ° ° c ° c ° ' c N z LLI 0 BIORETENTIO BIORETENTION AREA #8 = 1,541 SF = 0.035 AC. 6.0' 6" PERFORATED C PLANTING REQUIREMENT = 1,000 PLANTINGS/AC. _ PLAN TOTAL PLANTINGS REQUIRED _ - 35 PLANTINGS #57 STONE 15,0' AVG. PVC VIEW PIPE FOR (SEE INVERTS - 35 SHRUBS /TREES TOTAL PLANTINGS PROVIDED _ ) SECTION 0-0 W C N.T.S. :311 lliiiiiiim C BIORETENTION SIZING COMPUTATIONS SCALE: 1 "=20' DRAINAGE AREA A * C-FACTOR * 5% (WITH SAND BED) 6" PONDED an > J s = SIZE OF BIORETENTION AREA PTH 3 OF 12 MONTHS AGED MULCH WATER DE I ~1:5:~,nrz, - -1, u-, , 1 7m w w 1.96 AC * 0.85 * 0.05 = 0.083 AC. = 3,629 SF 6 3" OF 12 MONTHS AGED MULCH =1=1 TOP I~ " PONDED 6" PONDED " OF 12 MONTHS WATER DEPTH PROP. CURB WATER DEPTH 3 JF 12 M0 EL.=759.60 I _I I!~ l l„ 0 ui LATHS AGED MULCH TTOM EL.=759.10 BO I I=i I _ - 3:1 SLOPE Z TOP EL.=VARIES TOP EL. VARIES 1-= I-- - fTcP EL.=VARIES L.=VARIES 4 MIN._' - ~!I=11i: W PLANTING SOIL= TOP EL.=VARIES ! =1 - BIORETENTION PLANTING COVER COMPUTATIONS BOTTOM EL.=VARIES 3:1 SLOPE _i _ _ - .Ii- BOTTOM EL._ -VARIES 7. L~ - - - ' I- - - ! _ BIORETENTION AREA 7 = 3,842 SF = 0.088 AC. =111 4 MIN. ii-1-- NT = 1,000 PLANTINGS/AC. Ii _-,PLANTING 4 MIN._ PLANTING REQUIREME N i!- 3:1 SLOPE 6" 1/4" PEA GRAVEL ANTINGS PLANTING SOIL___ TOTAL PLANTINGS REQUIRED = 88 PL _ 0 SOIL MIN SAND BED 7- 7 1 MIN. 9„ TOTAL - PLANTINGS PROVIDED = 88 SHRUBS / TREES 11 1:- 6" 1/4" PEA GRAVEL - (l 1' MIN SAND BED` - . - -f! 6" 1/4" PEA GRAVEL _ - - (USE ASTM C-33 SAND BED CONC. SAND AND . BED,`- 0 MIN. 9' 112 0' 6 PERFORATED - PVC PIPE m v 0 C, v a r~ 0 - _ ~ #57 STONE BIORETENTION r,0 0 ~0^~ - EXPECTED VELOCITY ;Y, _ RATED 38.0' u THE TERRACED DESIGN OF THIS BIO-RETENTION 5.0 6PERFO 57 STONE PVC PIPE (SEE PLAN 3.0' 6" PERFORATED SECTION P-P W N.T.S. ~ PVC PIPE ISLAND IS INTENDED TO SERVE AS A VELOCITY # 10.0 AVG. VIEW FOR INVERTS) #57 STONE CONTROL MEASURE. MULTIPLE OPENINGS THOUGHOUT _ SECTION N N M DRAINAGE SYSTEM CONFIGURAl10N - 11~ BIORETENTION FILTER ION WIN (TYP) THE ISLAND WILL ALSO SERVE TO EVENLY DISTRIBUTE SECTION M-M (TYP.) N.T.S. rsi .:-.6 c'LT.S. SCALE: AS SHOWN THE FLOW THROUGH THE ISLAND. HYDRAULIC ANALYSIS INDICATES THAT THE MAXIMUM VELOCITY EXPECTED IN N.T.S. W SEP 2 3 2003 BIO-RETENTION ISLAND #7 IS 0.8 FEET PER SECOND. BIORETENTION FILTER DRAINAGE SYSTEM CONFIGURATION SCALE: AS SHOWN NATER SHEET: D11OF D20 i20 wg. File: DRAINAGE/03001BMP2 XREF: DRAINAGE PLAN STATE/03001BASE File No. NC Tax Map No. Job No. 03-001 Cadd D Fes- ~ U 0 77 U N~ARThLAKE U VLL~44E 8 = z ggy~q U Y W a ~r C ~ V ° ~ : t !n o ~ z o i ~ N N ~ ~ ~ g w Z ~ ~ ac s M ¦ fA V o cr ~ b 0 77 O ~ ~ M N V 2 I U D s ? J SCALE. 1 -2000 ~ M ~ ~ O W ~ o W Z W W W Q ~ z ~ p N a.ZQ ~ o~wa 0 ^ 0 o Q U n ~ ~ o ? U N L: o N II Li.l J ~ ~ U 1 N 1' 1, ~,~,~~'q 1 i in. ` IIUUIIIpUf,,,,p, i in. , , .o i 1 ~ . ~~```p P` oeeoe ~ '''~~4i o ~ y. ~ a e0oe . ~ O eoe 7 o°p to °sY(f 1 ~e o . _ a e ~ VaH Z:~= D1. COVER SHEET ~ ~ ~ e D2. ss°' °QO o°~'' SOILS MAP D3. OVERALL LAYOUT A~Ir~. ,,,o F ~„ADING PLAN D4. S.W.I.M. BUFFER AND F A N DELINEATION rimnnwnx~ D5. BMP A ~ REA MAP . ~ ` ~ D6. EXTENDED DETEN TION WETLANDS COMPUTATI ~ ` , ~ ! D7 ONS a ' ~ ~ FORMS AND WORK ° k ~ c 3 Ib.' 7>.;N L y sHLt rs D7A. F ORMS AND WORKSHEETS .l~Y I I w_ _ ' ' D8. BIO ' RETE ~ NTION AREA ~IAP NOTES y >3, ,AND DETAILS D9. BIORETENTION COMPUTAT > ~ / IONS D10. BIO r RETENTION COMPUTATIONS D11. ~w. ~ BIORETENTION COMPUTATION 5 ~ S I I' t- . i D12. SCS METHOD - , PREDEVELOPMENT SUBARE AS ' ~ 1 I a ,r ~ F 4 a r D13. SCS METHOD - PREDEVELOPMENT SWM CO MPUTATIONS I I k. D14. SC _ S METHOD POSTDEVELOP = ~ ~ MENT SUBAREAS L D15. EDW 2 -DET # ENTION COMPUTA , , ~ TIONS AND STRUCTURE DET I ~rc' 4 I D16. EDW _ AILS #3 DETENTION COMPUTAT ~4 II IONS AND STRUCTU `~'ta. ~ ~ , ~ ~ RE DETAI D17. LEVEL SP LS w r READERS AND Z r, ^~,~~r;, ~ OUTFACE EROSION CONTROL I 1 ~ D18. E MEASURES ~ ` ' / XTENDED DETENTI ~ t : , , ON WETLANDS 2 1 I ~ r ~ ,w. r „ , # SECTIONS ~ ~ . ~ ~ ; ~ ! D19. EXTENDED DETENTIO o ~ I I' r ~ M1 ! # N WETLAND 3 SECTIONS 'R ' ~ w D20. SIT T o UATION ~ COL COMPUTATIO NS ~ / I 1 ~ I I 3~- , , / "1 ~~n . +;v,~, _ ' o z , ~ ~ '•..t, i 'D a ~ ~ r. h ~ U _ - O I ' ~ THE TAUBMAN COMPANY M ~ll~ - a I ' 200 EAST LONG LAK ~ _ E ROAD o 0 SUITE 300 ~ N BLOOMFIELD HILLS MICHIG ~ ~ ~ AN 48303 ~ W ~ M ATTN: MR. RODERYCK BLAKE; MR. MIKE ~ ' ~ / MOUKALIAN 2 ~ , PHONE: 1-800-TAIiR ~ ~ ~ ~ ~ _ ~ _MAN W x ~ z w°O x ~ 7~zw ~ Z wo a W ~ZOOOp ~ ~ ~Q , ~ ~ cO M ~ ~ ~ / U Q pp to W tD f0 ~ ~ W Z~~nv~ z Z~Nn _ a ¢Q~ I 0 ~ po I I W~~~ ~ V ZUMM _ _ , t~ w O ca Z ~ a0 00 / C ~ F...~.~ Q ~ ~ I ~Q~,~ 3 NWOo i I 0 a i i i a / i q.. ~ i I / ~ O I %~`iM ~o ~ ~ ~ e _ I / .z ~ I I = O ° c? ~ ~ V Zs x x : ; . ~ Q Q i ~ ~ . . ~ 3JaO0c_p C9J~0 2 ~ O co 1 QV~O^ i QW ° I I _ o K, M LL ~ W OO Oo 7T[ ~ s ~-v. 11 1 fl W~ N N %w 5 C) i a i z Lu o L'3 a KEY MAP a J u~ z SCALE: 1"= 200' M F' J ~ ~ _ > ~ z° (;ITY OF CHARLI ILOTTE ~ Lu oc ~C (0) z MECKLENBURG C4 COUNTY o cc OC " m lkJOEt TIE[ CADAEt4 O W Z Y U File No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001COV XREF: DRAINAGE PLAN STATE/03001BASE W SHEET: D7 OF D20 ~ W~ 0 0 C n 0 r n o X ~ I ,i U ~ ~ U, U i'+~~ _ ? Y ~ a a O . \ W r i ~ ~ ' N ~ O ~'w_-_~___~~ 7 ~ \ ~ ~ . \ VJ ~ ~ ~ ~ Z h ~ „ T Ll,},~ ~ / ~ ~ ~-fl Ii. T. ~ ~ / ~ Mu ~ x ~ i J ~ ^~~.~,,~---~-~~~r_..-, ~ ('7 pry N ,,r e' _ ~ f 1 U N > w ~ ~ \ pC ..1 ~ O v / V /A 0 ~ ~ ~ ~ Q 0 ~ V ~y 1 D w n ~ w ti ~ o z ~ ~ ~ l o ~ a ~ \ s / YA ~ 1 ~i s~ ' G r--~ w Q ~ ~ ~t ~ i E'!~~' ! v. , ~ ! z ~ 1 N ti H.?~ \ ~ \ 0 ~ D ~ \ ~ ti Z ~ i. t yy i y. ! 1 ~ ~ w ~ d~'`' \ ~ \ ~ ~ ~ ~ o .a ~ ~ ~ JL.1 M }1 ~ ~ ° n a .___J ~ ~ / ,•1 , . ~ ~ ~ o rM o 1 ~ / t~ s;, C ~ l / ~ T ,J ~ - ~ ~ ~ \ ~ ~ I ~ I~~ . ~ '1 , 4. „ t ,u~ V a \ / J `'~~!~vr'~" ' .Ty„' / ~ s ~ , ~ a:~~~.. Q ~ _f / \ / ~ I ~ 1 nuuunnunny a r ~ I \ Q`~~~ y111j4i + I ~ ooaoaee ~~i~ 1 \ , p ~ I ~ „ °e,~ / /fi fi ~l ~ tl ~ ~j10 \ ~ -mom' m V U o°u N o° ~ C n. r ~ Q- y ~ ~ p0 ~`~Q v e ~ ~ ~i / //~/j/j , / ~ i / R \ ~ l 11111111 111111 ~ 111111111111111 / 1 ~ ~ / / / i ~ ~ w * % ) / ~ i ~ ~ / ¢ . ~ ~ o / ~ ~ ~ s ~ ~ / c ? I r,--~-- / V ~ 'v- r } , II ' a a~"`r'~ ;w; ~ ~ ~ Mfi" l ~ ~ff V:''.... -.f,. , '~G'e. ~ 1 ~ +A ~ V ~ 1 ^R 1 a ~ o , ~ 'a m, Q ~ ° . G.. ~ ~ C7 6 ` r I ~ v P ~ ~ ~ ~ ~ ~ ~ ~ \ 7 ~ ~ ~ ~ ~ ~ \ I Z ~ ~ ¢ \ ~ O \ oe Q ~ I d ~ ~ ~ ~ O~ $ I ~ / ' I U ~ 1 ~ ~ w / o • ~ , s ~ i 0 I ~ l . ; a \ ~ ~ 7 ? ~ ~ % ' ~ A r \ / 1. \ ~ ~ ~ \ \ r / g ~ ~ ~ ~ ~ A~ ~ ~ ~ Z I ~ ~ ~ I ~ I I cn s s~~~ ~ C~ " ~ " ,i! r { e z R ~ ,ti ~ ,-..n i ~ +r.. ~ ~ ~ ~ ~ 1 ~ g ~ ~ a 5 K:r ~ r, f ~ 's4 \ i i ~ ~ I ~ ~ ~ ~ ~ ~ / / ~ ' ~ fry:;., `0 ~ ~ ~ ~a / Q M ~ ~fi ~ ~ 1ti _ i ~ " ~ ~ ~ ~ 0 / / O O ' / O 1 ~ . , ~ . ( : Q U o ~ , l ; . , . , ~ , : A / Z w ~M ~ , ~ , \ ~ o C V ~ ~ N~ I I w o o a '`I w ~ X ~L ~I x l ~ ~ Q ~3 ¢ Z Z wo ¢ 0 1 ~ ~ zw w ~ o ,5 ~ 1 i ~ "w ` i \ W ZOOpO ~ Zz ~¢tOM I ~ ~ _tn ~ W 0_ tp cD D / V ¢w~u~ Z Ot01n ~ ~ ~..._1 ~ ~ l,~'~.~. ~ ~ ~ ~ W C.7 JJNi~ v Z aZ i t ~~pOI I ~ x 1 I / ¢ tb 00 N N I -U .MM 1 / I< / Wp~~ Z~'0000 \ / Y1 W ~ ~ ~J 1 ~ t Y> 6 O M ~ V >M ! / I- r/ 3 NZOO 1 t, . . ~4, ~ ~ ~ / C / ¢ I W M ~ ~ ~ ~ M Wei ~ ~Ow ; a: , n • r ~ - ~ J 1~-.J ~ ~ fi o t 1 ~ v ~ '4 ~ ~ ` 1 ' k ~ 1 o , Q _ ~ - a~ ~ / O O Y ~ O M r ^M ~O F ~ M M ti;,. I~ ~ N~ a . . , ~ .Z ~ 'Z ~ ~ Q¢ ~ 0 p~ 1 ~ ` ~ S ~ r_ ~ ~ ~ _ ~ ~ , ~ J g J , Z ~,I _ \ ~ ~ ^ ~ / U 32~~ Z=000 , . - 1 ' y ~i.S i ~ ~ ~ ~ tp , ~ / U ~O i I ~ Jaooo d O F- ~ ^ Q F- W ~ ;i ~v / ~ I ~ ZUnn F" G7 aliNN ~„~J r C` ; ~ ~w--J / / ~ ~ ~~1 W O O M li~~ 0 N CO~~ ~ ~ 1 ~ o f ~ / P L1,. i ~ ~ ~ ~ / ~ % ~ ~w~ i~ ~ 11 a illrlAA k HUNOr-r UUKVr NUMbr-HO F 8i;~oar: l ".~;9 =v~US; *rr,`~ n. ~F r,yb r t x.~ :a -DEVELOPMENT: E TOTAL CN=58 PR '7 Ftll THE ENTIRE SITE cc CN 5/5 (WOODS, coop CONDITION HYDROLOGIC SOIL GROUP: 8) CN=; 0 (WOODS, GOOD CONDITION, HYDROLOGIC SOIL GROUP: C) -98 / -DEVELOPMENT. TOTAL CN P~ST x, = Z /CN 9$ IMPERVIOUS AREAS, HYDROLOGIC SOIL GROUP: B) N's 4Lj CN 98 IMPERVIOUS AREAS, HYDROLOGIC SOIL GROUP: C) sJ O. 'Va-B 1 H SOIL LEGEND ? ) ~ P \ . Lys \ 1 / 21, ,tit zi TTE MECKLENBU COUNTY SOIL TYPES CORRESPONDING SCS SOIL TYPES t r APD APPLING RAVELY SANDY LOAM) B Ce62 CECIL (FINE SANDY LOAM) o, ~ p CeB2 - ~ CeD2 CECIL (FINE SANDY LOAM) B En6 EN (SANDY LOAM) C - He6 . ui I`''-- b(ELENA (SANDY LOAM) C MO MONACAN (FINE SANDY LOAM) C B ames pes PaE PACOLET (SANDY LOAM) i ) C W Va6 VANCE (SANDY LOAM I ~ ~i VdB1 PaE SHEET: D2 OF D20 • DRAINAGE/03001 SOILS XREF: DRAINAGE PLAN STATE/03001BASE No. NC Tax f~p No. Job No. 03-001 Cadd Dwg. File. Map File- ~ c~ 1 \ / / / / \ ` r--~ r / , \ - 1\ ~ I W 1 A ~ I n ~ ' 1 - ' - a - = n N _ o i X ~ . r ~ y V 0 "ice i~n~^1 \ \`J ' ~ ~ i U _ i / / I ~ i ~ / / J ~ ,~~.~r~ Imo'' \z-\ ~ - _ i, 1 } 11~~.. - ~ ~ S -~r_ / / , / r t / ~ : r.~ .~i.. r , / ~p~p '~j / ~ ' + + VFtC~L7~ I ' 1V ! 1\ f y L 1~1 5 r I ~`7" ' ~ O ~ _,G.=~f Yq~ \ \ ~ ~ U r /i ! 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W`--~.~ ~ .-p...... 1 1 1 I I I I I I ll ~ I ~ ~ P - i 1 1 1 , . 1 A 1 1\ ~ A V A A\ 1 I 1 11 1 11 I' / ! r 1 ) r , n \ / I l r \ 1\ \ \ I 1 / 1 I I I 1 ! i I f / t ' 1 \ r \ \ \ - i ' I \ 1 ~ ~ , 1 \ ~ 1 11 1 i\ v, 1 ~ 1r _ ~ ~ II ~ `v_; / 1 MH MANHOLE MH 1 11 ' ` ~ WU WATER VALVE WV ` ~ r ! + 1 1 I f J ! , r f ~ 1 ~ ' ---'1 \ ~ - - - ~ r I ~ I 1 \ \ \ I 1 \ \ I I I 1 1 1 f \J 1 1 1 / i t I 1 1'^ _ ~ , , / 1 I 11 l \ ` ~ I d \ / ~ 1 I I I 1 1 ~ ~ 1 / i ' ' i~ / I! / I ! ` _ 1~1 i _ ` 1 ~ \ It_ ~ r' % I ~l \ ~ ( I `~~\~1 ~ ~i/ 'rI ~ ` ~ 11 I - ,''~v`.,!/ WM WATER METER , r _ 1 1 , WM `yI l I ) ~ I 111 ~ 1 J / ! / / I 1 I I l - i ~ ~ I ~ 1 \ \ 1 1 1\1 1rl 1j I GM GAS METER GM 1 r / / ~ ' i I , i ~ I / 1f I II I 1 1 I ~ I I f \ f 1 / ! r I 1 I AI _`~T r r t ! ~ ~y \ /11 ~ A ~t ~ 1V111 1 ! ~v\ ~ l l I j l l l II / I 1 I„ 1< I 11 A 1 1 I I ~ ~I ~V n 1 I V 1 I ' TCB TRAFFIC CONTROL TCg / AI , \I I I I I I I 1 1\ ~ I 1' ~ V A\ lV 1 I / ~ ~ - / A\ ~ 1 1 1 ~ V 1 1 1 I ' ! r \ 1 1 I I \ \ \ ~ 1 I r \ - ~r. r v 1 1 / l BOX o 0 1 I I I l A v `~-v I A 1 1 I 1 vI` _ 1 V 1 A ~ I II 1 1 ` I I Il t I I\ 1 I I I ( I 1 l ~ i j 1 ~ ? I \ ` 1 1 1 ~I I I 1 lx ~ ~ ` ~ ~ 1 / - l; LP LIGHT POLE LP \ I I I 1 l I I I ~ ' 1 / I 1 j I ~ I I i / i t~ / ~ I 1 ~ j 1 l I ' I AV 1 ( 1 t ~ _ I ~ \ 1 l ~ 1 ~'j ! l ~ ? 1 - I`~" ~ f, 1 ; , v 1 ;I'll LIGHT POLE - ~ 1 1. v __~I ~ r ~ , v / , , / , LP/S LP/S toil ~ 'Q N v l ~ ~ ; ~ , ; f (1 ~ ~ v / ; / , I r WITH SIGNALS ~ I I ' N\, ~ 1 I 1 / / / ~ / ~ ~Q ~ p Z \ I\ \ I 1 li I I I I I I I I I r' ' ' I I l 1 1 1 1 I 1 ! y\ , / ~ I~ ~ I I i j 1 Yd ~ l I f 1 r ' ,/i l j / ~ 3~ 0 q~ / ~ ? ~ I 1 ~ , I ; ~ ; , CURB & GUTTER ~ z ~ _ \ 1 1 \ \ \ \ \ rl l r ~ I 1 1 i \ r -1 l 1 \ ~ ~ \ 1 \ \ \ \ \ ~ ~ 1 1~ 1 I 11 ~ 1 1 I I 11 ( ~ 1 l \ , 1 / \I I ,I o: i~ i 1 I I r r i/ ~ CG-2 ~ Z~ XX W~ X / la 1 1 1 ---'r Q q 1 ter, : u' 1 r / / / - ~ (n Ly. IL e.r= 1 I r . ~ . ~ I 1 1 I 1 ~ , TRANSI110N FROM CG 6~d tn~o.- "'00 \ 1\ \ \ / 11 t t ~ 1 1 1 , 1 I 11 1 1 1 t I 1 I r t ( / ~ ' , r ~ CG-6R TO CG-6R _ ! = oo tc Z ~ o co I I - . , , z~~ ~ ~ \ \ ~ \ ~ \ \ / / ~ 4\ 1\\ I 1 I ~ ! !1 I II i ` 1 \ I \ I I j ~ I I j I I I I .1'+ a:: ='a- r ' V ~ r ' i CG-6 - R ~ O ~ a O cD r 1 1\ \ ` • \ ~ ~ I \111 1 I j / 1 / 1 , 1 \I I I 1 I I I I / I r SANITARY SEWER S ~ ; M Qa ~ W ~ / 1 ~ , Z q~NN 1 I 1 \1 r 1 c I 11 / / . i f 1 _ _ _ , * SANITARY LATERAL SL ~3 0 ~ W o o~~-` CLEAN OUT o C,O. ° N mw ` i I - I 1 1 I I I I f \1 t\ 1 ~ i \ i \ ~ J!I lil I I ~ ~~11 I~~ I I11AN / 1 1\?~\ ` ` ~1 11 ; 1 1j11 ~ / 1 I 1 I ~ 1 ^ / / I , I 1 \ I / r loo, WATER MAIN W FIRE HYDRANT r , I i PLUG I I OVERHEAD WIRES J ` / - UTILITY POLE ¢ uj 0 UNDERGROUND i / UE UE ELECTRIC / t T TELEPHONE T - G GAS MAIN G i E ELECTRICAL E W TRANSFORMER r11 ~ 11 tt\I ` - ~ ~ ~ 1 t \ ~ ) II \I 1 HANDICAP - , , A-N RAMP (CG-12) ' GUARDRAIL o FENCE j -x ---x ---x 1 I - ~ ,l ~ ~ 1 ~ , ~ \ 1 1 I l TRAFFIC FLOW ; ? LIGHT / TREES LL LIMITS OF CLEARING Nq- AND GRADING -260- 260 CONTOURS 264 - - 264- - / r \ 1 t? I / I ~ / I 1 „ J / , +264 SPOT ELEVATION +264 50 I r , 11 r ,'r,~r'I pp TC 0 OF CURB TC BC BOTTOM OF CURB BC ca - /,r TW TOP OF WALL TW _ BW BOTTOM OF WALL BW HP HIGH POINT H.P. W \ / \ Ire/• - ~ -'T~»---- uYr.-~ \ \ - J LIMITS OF CLEARING ' ames W File No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001LYGR XREF: DRAINAGE PLAN STATE\030016ase SHEET. D3 OF D20 N ~ H 0 U U U = z U i Y Q i 3 Q ~ U o 0 g w Z z ~ 5 a. _ ~ ~ ~ b o ~ ~ M N ~ ~ ~ o _ ~ U M Nj Y 7 tY N p/~~~ ,y0y, M ~ 1OV ~~D7o~e~o v' Q ~U~FER ~ a V ° z W 45' MANAGED-USE ~ W BUFFER 1NE~LAN o Z W 0 REMAIN w Q ~ WETLANDS z (TO REMAIN) x 0 N ~ 25' UPLAND ~ 30 STREAMSIDE ' ~ BUFFER 30 212 A®®I~BONAL 8 ~ BUFFER UP N®~ONE o ~ . N g r / r- r- , °j~e II FLUM FLOODWAY ~ ~ ENCROACHMEN'T LINE (.1) , r ~ ~ / i ~~f , ~ .,i- 00 S.WJ.M. I ~ + + , , n1llummrgrrr~i BUFFER ~ _ I / / / ~ ~ _ 000 \ y ~ ` ~ M 0 4 WETLANDS , + „ + + + + + / / / i i ,v / / x •.:~it` ~ r \ ~111IG U 9.P91~6~ ~ • p °e~ i (TO REMAIN) ~ _ ORES ~ ~ w, a i ~ ~ ~ + + ORES a / r. ~ \ ~ e ~ \ \ i v 00 0° 0 0 i - i / , ~ ~ ~i pp + + + + \ ~ "nn ///L1////////// + ~ + + , \ FLUM FLOODWAY 75 CLASS B BUFFER ~ I i + ~ 7x/ / + + + + \ \ ~ \ \ / + a + \ \ ~ \ 33/ / r 1 ENCROACHMENT LINE (1) ~ ~ ~ / ~ I ~ I ~ + + f~~~ i i 32 727 SF ADDmONAL ~ I , t \ + I I r I 1 +i ~ I UPLAND ZONE - " i ' + a ( \ I 1 733 ~ r ~ ~ .i D / ~ I + + + ~ + ~ ~ \ ~ I \ ,J i l + + , + \ \ M R D M I I ~ ~ \ i o F FRI f-' ,732• / / ~ / / 1 ~ ~ ~ \ 33 / / ~ UM / .r + Q ~ ~ / o / ~ / ~ 1 / / / / w / / ) I \ / ° / SEDIMEN / / / / ~ / / r / FOREBA ~ I \ / + \ ~ ~ ~ ~ ~ ~ I l i \ f \ \ / \ I Q \ \ ~ " ~ I 1 728 \ ~ \ \ \ 1 ~ \ x / ( \ \ / I . \ fA t I ~ / ~ i ~ / i ~ / \ g v e ~ \ I / ~ \ \ ~ ~ ~ O \ I I ~ \ ~ 1 L \ I 1 / M I ~ \t ~ f 1 / Q o0 0 1 1 / ° \ ° I I f . \ f~ 1 / / o - ~ ~ ~ ~ 1 ~ ~ N f ? r a. ~ ? . I ~ { I ~ ~ ~N r ~o ~,;.r ~ w n ~ ~ f V ~ / 7 ow ~ Z ~ w~ • % / zooap ~ ~Q~r~ I a ~l rr~~ ~ ~ ~ ~ . 1 ~ • 4 / I / W ~~ODr,~n Z~N~ ~ej.' ~ / ~ ZZ I I ~ p0 I I 1 / ` : I ~ ~ h, ~ , ~ ~ ~ ~ I I ~ ~000a0 U UVNN / ~W ~ ' " ( . ~ • ~ ',.uy . / ~ ,k / v Nr7M V OZMM y 1 ~ ~ rt~ x , I 1 i ~ / ~a~l~ NWMM F I ~ a . / l ~ ':k r„ ~ 'n V ~ , I / ~ ~ / :1\ + r _ w I I -a8 f+i„ ~ ~ ~ ;4 , ~ ~ ~ / I 1 1 I , ` / 1 \ 1 / 1 ~ ~ \ o 0 1 / o ° r7 t ~ / \ 1 ~ I / ~ •r N;~. ~ V I ? / / ~ ~ ,.t , ~i~' ~ e.'~.„ 1 \ Q ~aMo \ ~ ~ ~ , ,fi ~u~ 1~ f s.,, s{ ~ k _ +i rymm -..;'._7,. ~ ~ / : ZQ ` O Z ' l / ~ ~c? Q 0~ _•~~i ~ ~ ~ v, ~ \ ~ ~ ~--v ~ x Y~ x 1 ~ ~ ~ ~ 1 / '`k ~ / 3 T ~ F \ / 2 ~JO~~ V, ~00 \ ` ~ I. ! ~ 1 ~ ~.~Y-" / U orn m O=fin I 1 \ \ x: r:l-: r `9 >I_ I I I 1 ~i \ ~ " ~ v~y,~ o~-^~ Q i--goooo I ~ ~ \ 1 L. \ 1: ~ F- ZC~~~ ~ V QL~NN ~~`.~W' r "'a~,: ( .i ,7^y~~ 4~ ~ /j ';.G ' / / O~^~~ W Wpi'v~ / 1 1 ~ F Y .t A.. y. I' L. ~ of r.`L`.-~ h'"~~ .''A ~ f ~...4.. / / \ M~L ~ Om~./ I / ~ ~ - v \ 1 ,1 ~ I~ I r I I ~ w ti V .f J ~c r. 1 ~ ~ - ~ -~r~ ~ 1- ~ ~ ~ ~ 5, 1. ( ~ ~ i ~ ~1 / / / 1 , 4a ~ ' i / / / 1 f ~1 } / ~ / i i ~ I ~ ~ I i u..l x..V,l'. I I I' II .~.w,..vcY LL 'S o..: i. q, ~ Arv.`~~e.wTSYio ~ i I drm rg' J I 1 \ 1 1 1 I \ I t ~ ~ LU 0 cc I l ~ I 1 \ t~ I s I I 1 1 I I 11 \ ~ ` e ~ I i ? I ~ 1 r a ~ r 1 1 I / i ~ J~m J H ~ 11 I I I < i Z I 1• I 1 t p t 1 / I I I r Z ~ ~ 1 1 r ~ 1 U / l ~ a i aTM LL. l n \ ~ I ~ 1 1 LLw Mm I. \ ~ 1 I 1 I / 1 i CC - m ¦ W J W SHEET: D4 OF D20 File No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001LY1 XREF: DRAINAGE PLAN STATE\030016ase N ~ H ~ U ~ U _ ? U Y Q W Q ~ U D g w Z S M ~ s o C~ M N 0 ~ r I . U ~ N ~ ~ ~ J M ~ ~ p a OOL AREA = 22,895, SF oa~o PERMANENT P z OL AREA =110 248 SF w ~ ~ PERMANENT PO , Danz oc c~ F W co a EX. WETLANDS w a o ~ EX. STREAM h x z , TO REMAIN ~ N .....--rartvr~: 0 ~ EX. WETLANDS x r/i//~ rv/. ~r ~ v//, M W TO REMAIN .i// . • : vv • • . Li. ' ~.•.~/,/r fir a~~ 0 J ~ c V ~ n O >nr ~..//.iii: fB~AY '~//////r.••~~r•• N EX. NDS ru/////r. ~ V //~~iiiiiiiiiii: • ~~//u//n////n///!• . IN ~ TO = 82193 SF ~ ~ • i~~~i~iiiiiiiiiiiii/if! 7 . ///////////III/n). • ///////un /r •v/////n//~' ~/u• w SURFACE AREA q ~~.w 4///////// ~~///~I • ' iII+/// i ~/////I•tY//// ~ • ~//!/////i. 4 • : • ///I//I/I/!i • • N/III/II// ~Q ~ ~ ~ ~ ~ ~ oooeaooo /~i CO i ~ 0 O I GAR - ~Y a 2 o e~ y~,, :~o ~ e _ ~'1~i 4 OW 0 F_~ ca P s; s ~ . ,r y 4y// IIp111111Ntlpp11 +r' ~ r a , ~x Q k. ~ ~ ~ ~l } 3' p o . fi ~ t«~.. +,ve' ~ ~ AR a S ~ § ~Y . ~ :2S - ~ : ~ ~tl Arxr ry~k' r SvC -N Via., ,~~g~. A - . y ~ i.,- - x ~ m. 4 ^2} ~ k 1 ..:~5;: Q + . A DRAINAGE AREA = 0. DRAINAGE r~ ":4 ~ i= a ',r - ~ , fem.= ~ Q ~ O n ~ ~ ~F~' y ~4' ~ _"z t1~~ 0 0 0 0 o Z 0 I v N n' g U O D ~ M DRAINA 06 Ac. a INA AREA 1. DRA 0 a ~ N N O U r ~ Z 1- ~ o v ~ to N _ .?t ~ ~j 00 X INAGE AREA 116 Ac. ~F,,:,. . - w z w Q DRA ~ ~ wo ~~Z~ ~ a o ~~,,y~~'~', Z 00 N ~ tD M o w~~ ~ Qw00~ Z z~Nn V W zou"n -io Z Qz i i '0'AA ~ a~ i i W ~ ~Q~~ V! V V _MM VI WO~CO Z ~ Jdw'000~ ALL STORMWATER MANAGEMENT AND ~ I~iHpryM ~ V O>MM Qtr NWt~M BMP REQUIREMENTS FOR THIS PARCEL ~w jai (n .'0~^i WILL BE TREATED SEPARATELY WITH ITS FUTURE DEVELOPMENT. THE ~ n Ow GE ARE~c - 0.96 A DRAINA ~ RAINAGE OUTFALL FOR THIS PARCEL D O 1 '1 ~i In G• YED THROUGH WILL NOT BE CONVE L__J MALL PROPERTY. THE • O 0 O M / W M ~ M ~ , / :Q ~ Qa e / ~ ~c~ Q oc? = U U ~ V Z ~ w ~ X i w~y~ X Y Q / = NJOe- (9JOfOD ~ V ~'=w~ m o=~~ ~ ~o~~ _ ~ J9o~oo~o a v oF-r~r a r-w~n~n ZC7^^ ~ V QILL.NN pO~~1 W w~iv-. O~ pppp 00~~ Q. r.Q~N OJNN M L~-w O N ~]w J i ~ BIORETENTION AREA MAP C) SCALE: 1"=200a EXTENDED DETENTION WETLANDS AREA MAP SCALE: 1"=200' a J ~ a~c > mi z Q LEGEND a TO STORMWATER T'REATMEN'T AREA a. s~o~HnoN arR,s u~ W z } UTILIZING THE NATURAL FLOODPLAW Am5010 Ac. ¦ ~ ~ ~ TO EXPENDED DETENTION WETLAND #2 1 ~ M ¦ MAJOR DRAINAGE DIVIDE Z DRAINAGE AREA TO BIORETEMION Q Q O O A=t146 Ac. • • MAW OIJTFALL V TO EXTENDED DETENTION WETLAND 83 A=73.89 Ac. 4 WETLANDS TO REMAIN m ~ V P. a wn m O W Z J v W SHEET: DS OF D20 \ Foe No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/030018MP XREF: DRAINAGE PLAN STAiE/03001BASE ~ ~ REA DEPTH DISTRIBUTION REQUIRED: ~ 0 MINIMUM EXTENDED DETENTION WETLAND A U U, GENERAL NOTES: NENT POOL AREA ~ DIMENT FOREBAY 20~ OF PERMA ) 1. SE ( = z U - F THE EXTENDED DETENTION WETLANDS BASINS 2 AND 3) WERE DESIGNED IN ALL 0 ( # # ° OF PERMANENT POOL AREA, 0 TO 9 DEEP) 2. HIGH MARSH (35~ Y Q CONFORMANCE WITH THE RULES CONTAINED IN THE NCDENR STORMWATER BEST MANAGEMENT PRACTICES MANUAL FROM APRIL 1999. ALL OF THE BASINS HAVE BEEN DESIGNED TO ACHIEVE 85% TOTAL SUSPENDED SOLIDS (TSS) REMOVAL, AND THE FIRST O INCH OF RAINFALL WILL BE RELEASED OVER A DRAWDOWN PERIOD OF 48 TO 120 OF PERMANENT POOL AREA, 9" TO 18" DEEP) 3. LOW MARSH (35~ p HOURS 2 TO 5 DAYS . RUNOFF CONTROL MEASURES SHOWN ON THIS PLAN HAVE ( z + + + + + + N BEEN DESIGNED TO MEET OR EXCEED NORTH CAROLINA STATE GUIDELINES FOR + + + + + N EXTENDED DETENTION WETLANDS. + + + + + + ttttttt~ g RMANENT POOL AREA Z 4. MICROPOOL (10~ OF PE 5 ~ T i M ~ N U S o MN 0 ' °j O a0 U ~ ~ ~ rr ~ J ~ ~ J G a 1. CALCULATE PERCENT IMPERVIOUS COVER DRAINING TO BASIN #1: 0 BASIN p Q .i`, o 1. CALCULATE PERCENT IMPERVIOUS COVER DRAINING T ~ Z LL 3ASIN #1: 1. CALCULATE PERCENT IMPERVIOUS COVER DRAINING TO TREATMENT AREA ~1: W AMOUNT OF IMPERVIOUS AREA = 10.16 Ac. = 89% AMOUNT OF IMPERVIOUS AREA 59.04 Ac. _ ~ !L _ - 80~ p ~ z AMOUNT OF IMPERVIOUS AREA = 45.10 Ac. = 90% TOTAL SITE AREA TO BASIN #1 11.46 Ac. TOTAL SITE AREA TO BASIN #1 73.89 Ac. TOTAL SITE AREA TO BASIN #1 50.10 Ac. W Q ~ Z ~ ~ ~ N n.Za 2. DETERMINE AVERAGE PERMANENT POOL DEPTH: 2. DETERMINE AVERAGE PERMANENT POOL DEPTH: ~ W o. 0 2. DETERMINE AVERAGE PERMANENT POOL DEPTH: PERMANENT POOL DEPTH = 3.0 ~ PERMANENT POOL DEPTH = 3.0' PERMANENT POOL DEPTH = 3.0 0 3. FlND CORRESPONDING NUMBER FROM TABLE 1.t: FIND CORRESPONDING NUMBER FROM TABLE 1.1: 3. 3. FlND CORRESPONDING NUMBER FROM TABLE 1.1: • • Table 1.1 Sw fue Am co Drain~e Ana Ratio For Permanent Pool Sizio~ For 8S~ PoquWit 'oc:+ Svrug Fot 8596 Pollutant e 1.1 Surface Area to Drainage Ana Ratio Far Permanent Poc~ Sizing Fot 85 Table 1.1 Surface Area to Area Ratio For Permanent Pool Sizing Fot 8596 Polluant T~ Drainage Removal Efficiency in the Piedmont Removal Efficiency im the Piedmont ~ti~~uiuuu?nrnrr Removal Efficiency in the Piedmont I yr~~~~~i 96 Impervious % Impervious Cover 3.0 4.0 S.0 6.0 .0 9.0 v o° °°e .0 9.0 Cover 3.0 4.0 5.0 6.0 ?.0 Coves 3.0 4.0 5.0 6.0 7.0 8 ~ . n ~ .7 O.S 0.51 .46 44 U ~ S : 20 .79 0 0 c~ 0.51 .46 0.44 0,97 .79 .70 .0.59 0.51 0.97 .74 0.70 .0.9 0.51 0.46 44 ~ 20 0.64 0.62 ~ S ~ o°° ~ 30 1'. 1, 4.70 1'.34 1.08 0.97 0.8 0.70 30 1'.34 1.08 .97 0.83 0.70 0.64 .2 0.70 0.64 0.62 ° .2S 0.90 0.82 77 dp °o°° ~C 40 i.73 1.43 ~F .90 0.62 40 1.73 1.43 1.25 0• ~ .77 40 1.73 1.43 1.25 1.05 0 0.90 0.82 .09 1. q~~~i ~ p\`~~ SO 2.06 1.73 1.50 1.30 i 1.00 .0.92 50 2.06 1.73 1.50 1.09 1.09 1.(10 ''rrnnrrniumnuau~?`,` .40 2.03 1.71 L51 i.29 t8 1.10 50 2.06 1.73 1.50 t.30 1.09 1.18 1.10 60 Z.40 2.03 1.71 1.29 i.29 1.l8 1.1 .40 7 .7 1.54 1. 2,03 1.71 1.51 129 1. S 1.26 7 . 8 .40 .07 1.54 1.54 1. S . 6 7 ~ 210 1.86 1.42 c 70 2.8 2.40 .07 1.79 1.54 1.86 i.4 1.60 1.42 80 2.78 0 1.86 80 3.36 .7 2 2.1 1.86 90 74 . 3.10 2.66 2.11 . 4 3 2.11 .83 1.67 2.11 1.83 1.67 9p 3.74<:: 3.10 2.66 2.34 2.1[ 1.83 L67 'ven io die bad of the table arc given in pacentages. Nooea: Numbers given in the body of the table are given in pp+xtttages. Notes: Numben>lx Y g~ Coastal SA/DA ratios can be obtained from the local DWQ Regional Nodes: Numbers given in the body of the table aR given in petreutages. Coastal SANA ratios can be obtained from the local DWQ Regional c~ Q Regional Office. Coastal SA/DA t~tios can be obtained from the local DWQ Regional Offi FROM: STORMWATER BEST MANAGEMENT PRACTICES, NCDENR, APR FROM: STORMWATER BEST MANAGEMENT PRACTICES, NCDENR, APRIL 1999 NCDENR, APRIL 1999 FROM: STORMWATER BEST MANAGEIuIENT PRACTICES, NCDENR, APRIL 1999 4. DETERMINE REQUIRED SURFACE AREA: 4. DETERMINE REQUIRED SURFACE AREA: 4. DETERMINE REQUIRED SURFACE AREA: NUMBER FROM TABLE 1.1 ABOVE x G DRAINAGE AREA =SURFACE AREA NUMBER FROM TABLE 1.1 ABOVE x RAINAGE AREA NUMBER FROM TABLE 1.1 ABOVE =SURFACE AREA CONTRIBUTING D = A CONTRIBUTIN AINAGE AREA SURFACE ARE 100 x CONTRIBUTING DRAINAGE AREA 1D0 100 0 3.74 x .0.43 Ac. = 18,670 SF (Si 3.36 x qc, = 2.48 Ac. = 108,147 S (SURFACE AREA REQUIRED) a 3.74 = 1.87 Ac. = 81620 SF SURFACE AREA REQUIRED) 11.46 A x 50.10 Ac. ~ ( 100 SF SURFACE AREA REQUIRED 73.89 ;,670 ( ) 100 ~ W 100 0 SURFACE AREA PROVIDED = 22,895 SF SURFACE AREA PROVIDED = 110,248 S SURFACE AREA PROVIDED = 82,193 SF 0 z NOTE: 5. FlND VOLUME TO BE CONTROLLED FROM 1' STORM: STORMWATER TREATMENT AREA 1 UTILIZES THE NATURAL 5. FIND VOLUME TO BE CONTROLLED FROM 1" STORM: FLOODPLAIN AT THE OUTFACE OF THE PIPE.. THE . , THE DESIGN RUNOFF VOLUME (THE TEMPORARY WATER QUALITY rn COMPUTATIONS ABOVE DEMONSTRATE THE SURFACE AREA TO TEMPORARY WATER OUnLITY THE DESIGN RUNOFF VOLUME (THE ~ QUALITY POOL) TO BE CONTROLLED MUST BE HELD IN THE BASIN ABOVE BE CLAIMED BY THE NATURAL DOWNSTREAM AREA. POOL) TO BE CONTROLLED MUST BE HELD IN THE BASIN ABOVE SEE SHEET D17 FOR OUTFACE DETAIL AND RIP RAP SIN ABOVE Q THE PERMANENT POOL LEVEL. THE PERMANENT POOL LEVEL. COMPUTATIONS. USING THE RUNOFF VOLUME CALCULATIONS IN THE "SIMPLE USING THE RUNOFF VOLUME CALCULATIONS IN THE "SIMPLE ~ SMPLE METHOD" AS DESCRIBED BY SCHUELER (1987): METHOD„ AS DESCRIBED BY SCHUELER (1987): Q ~ 8 s SURFACE AREA OF STORMWATER TREATMENT AREA = i V r k' Rv 0.05 + 0.009 z W - M U1ILIZING THE NATURAL FLOODPLAIN Rv = 0.05 + 0.009 (I) STORM RUNOFF INCHES ~ ~ ~N ( ) STORM RUNOFF (INCHES) WHERE Rv =RUNOFF COEFFICIENT = STORM RAINFALL INCHES IFF (INCHES) WHERE Rv =RUNOFF COEFFICIENT = , ~ W~ X ~ STORM RAINFALL (INCHES) ~ ~3 a z Z wo ~ ( ) ~ o BALL (INCHES) zZ ~ ~Q~ AREA ACRES W ~ ~ . ° ~ ~ ~ ~ IMPERVIOUS PORTION OF DRAINAGE U a,,, ~ ~ Z o ~ ~ IMPERVIOUS PORTION OF DR. I =PERCENT IMPERVIOUS = DRAINAGE AREA A ORTION OF DRAINAGE AREA ACRES I =PERCENT IMPERVIOUS = z zzi'`i' O Q o°Nr DRAINAGE AREA (ACRES) ~ a a o0 0, U V N N JAGE AREA (ACRES) ~ ; ~ - ? ~ ~ ~ J IY ~1""MM V OZr7M - ~at\f` ~ NWOMM Rv = 0.05 + 0.009 (89) = 0.85 (IN./IN.) Rv = 0.05 + 0.009 (80) - 0.77 (IN./IN.) ~Ww N mow VOLUME TO BE CONTROLLED: VOLUME TO BE CONTROLLED: VOLUME _ (DESIGN RAINFALL) (Rv) (DRAINAGE AREA) VOLUME _ (DESIGN RAINFALL) (Rv) (DRAINAGE AREA) 1 FT. 1 FT. VOLUME = 1 INCH x 0.77 IN./IN. x x 73.89 Ac. S o VOLUME = 1 INCH x 0.85 IN./IN. x x 11.46 Ac. 12 INCH ~ Ac. 12 INCH ~ ~ - ~o VOLUME = 0.812 ACRE-FEET = 35,360 CF Q VOLUME = 4.741 ACRE-FEET = 206,530 CF ~ o.. .Z ~ oZ Q Q to O oar THIS VOLUME WILL BE DRAWN DOWN OVER A PERIOD OF 2 TO 5 D. THIS VOLUME WILL BE DRAWN DOWN OVER A PERIOD OF 2 TO 5 DAYS. ~ _ U ~ _ OF2T05DAYS. Z ~ X Y ~ X QQ Q N N IQi J f/'1 4. J~~ ~~Oc00 ~ ~ ~ F'~ ZC~~~ ~ 0 QLt.NN _ _ _m-- - 1 ~ J~ ~ ~ 6 O N N ~ ~ \ ~J rat - .wr?~/ ~ 1 ~ ~ h` ~ - ~ . ~ i < r w 94t - - . ~ ~ \ \ \ „N; T tTT17Y(/Y.l%f'j~~\+\~+t{#+~+ 44y ~\\;\i\ h\\\+\ r 000 Ina. 40 CD \ \ \ ,d '11. ` A/~/1 VX/y/,,lfiT,I/~ + + \ ` y Iyy ..fir. C` ~ J e fw / \ \ ` \ J) Ir ! ) fl~ J`A\/V Y\A(I(/ A` / / / / \ \ 1 1 \ 1 \1y11 II~ \ ? `I b I 4 ` JI / ~ / / t' % / ` \ , y oaf. \ tll II \11 \ O \ \ \ \ \ tY r ( I I/_~ . 5+ \ l 1 ` + /V \ \ ~y 1 \ A~ ~II~ II~ LU \ \ N Y, I i \ \ . It 1 - 1 \ ~ \ \ . e \ ' I , + + 711 y 1 r! ' N&I \ NkIII IN Will, /I ~ - \ 'IN cc / / / ~ ~ ~ y J/'r / ' + ]r` i ~i'~ ! I I I \ ` \ ~ Ill t% ly ~ \ I I'^ ` : \ 1 1 l y 1 I 1 1 ' I I 1 1 \ 1 11 l y 1 \ .x + 4 y ? ) / .~11EMAIN. ! l -Z74/- 04 + 1 S' / I y 1 + + ( UJ FGK-B 'IN Ile- No uj SEDIM v J~m um 738 1 0 r V~~FD/1 ` goQOp ~ it ! J ! i / / I 1\ ` / _ \ r * ) / I / 1 1 1 ~ 1 i I / - ,156 t / , - W ~1I I \oe W STORMWATER TREATMENT AREA (S *r=NDED DETENTION WETLAND #2 M #2 (SEE SHEET D18 FOR DETAIL) EXTENDED DETENTION WETLAND #3 (SEE SHEET 19 FOR DETAIL) SCALE: 1"=100' THE NATURAL FLOODPLAIN (SEE SHEET D17 FOR DETAIL) SCALE: 1"=50' UTILIZING SCALE: 1"=100' SHEET: D6 OF D20 File No. NC Tax Map No. Job No. 03-001 Cadd Dw9. File: DRAINAGE/03001BMP1 XREF: DRAINAGE/03001 BASE Project No. DWQ 021204 to be rovided b DW ~ P Y Ql Project No. DWQ 021204 DIVISION OF WATER QUALITY - 401 WET DETENTION BASIN WORKSHEET (to be provided by DWQf DWO Stormwater Management Plan Review DIVISION OF WATER QUALITY - 401 WET DETENTION BASIN WORKS A complete stormwater management lan submittal includes a wet detenti DW Stormwater Mana ement Plan Review: HEET P on basin worksheet for each basin, design calculations, plaits and specifications showing all basin and outlet structure details, and a fully executed ~ ~ f- O A complete stormwater management plan submittal includes a wet detention basin wo operation and maintenance agreement. An incomplete submittal package will result in a request for additional design calculations, fans ands ecificatio rksheet for each basin, V P p ns showing all basin and outlet structure details, and a fully executed information and will substantially delay final review and approval of the project. operahon and maintenance agreement. An incomplete submuta! acka a will re V I. PROJECT INFORMATION (please complete the following information}: P g salt rn a request for additional 2 Z tnformatron and will substantially delay final review and approval of the ro'ect. U Project Name : NORTIiLAKE VILLAGE P1 i. PROJECT INFORMATION (please complete the following information : Y Contact Person: JILL OLJNGER Phone Number: 703 532-6163 Project Name : NORTNLAKE ~ VILLAGE W For projects with multiple basins, specify which basin this worksheet a tics PA to EDW ~2 Contact Person: -JILL OLINGER Phone Number; ~ Basin Bottom Elevation 731.50 ft. (average elevation of the floor of the basin) F r (7031532-6163 o protects with multiple basins, specify which basin this worksheet applies to: W ~ V o Pemianent Pool Elevation 7 3.00 ft. (elevation of the orifice invert out} f0 Basin Bottom Elevation 732.50 ft. (average elevation of the floor of Temporary Pool Elevation 734.09 fl, (elevaron of stie ~t:;le: ;.:~tc~;.:aver, in) ?..:..u::~.:r ..c°%~::cr. the basrtrl it. ~eievation of the onice invert out O Temporary Pool Elevation ft. } N (elevatton of the outlet structure invert in N Permanent Pool Surface Area 22.8,x„_ sq, ft. (water surface area at permanent pool elevation} Drainage Area 11.46 ac. (on-site and off site drainage to the basin) cn g Impervious Area 11.46 ac, (on-site and off site drainage to the basin) Pemtanent Pool Surface Area s ft. water surface area at rmanent ~ q' ( Pe ool elevation Z Drainage Area ac. o - ' P ) W _ (n site and off site drainage to the basin Z impervious Area 73.89 ac. ) Z Permanent Pool Volume 31.517 cu. ft. (combined volume of main basin and forebay) (on-site and off-site drainage to the basin) ~ S Temporary Pool Volume 35.360 cu. ft. (volume detained on top of the permanent pool) Permanent Pool Volume 158.149 cu. ft. (combined volume of ~ Foreba Volume cu. ft, ~ Y 6.303 tnartr basin and forebay} I Temporary Pool Volume 206.530 cu. ft. (volume detained on to of the e ~ ~ U ° ~22 ,8,9,~5__ 1 P p mtanent pool) ~ ~ s Forebay Volume _ 31,630 cu, ft, f~ N SA/DA used 4yy,lyt3 'f'f su ( dace area to drainage area iaho) O O ~ o 110 248_ 1 = t Diameter of Orifice 2.25 in. {draw down orifice diameter) SA/DA used 3~$f,~$- ~ V N> (surface area to drainage area ratio) ~ ^ ~ II. REQUIRED ITEMS CHECKLIST Diameter of Orifice 5.50 in. (draw down orifice diameter ~ N The following checklist outlines design requirements per the Stormwater Best Management Practices manual } U) M II. REQUIRED ITEMS CHECKLIST O o (N.C. Department of Environment, Heath and Natural Resources, November 1995) and Adtrunistrative Code Section: 15 A NCAC 2H .1008. Initial in the space provided to indicate the following design requirements have Dora The following checklist outlrnes design requirements per the Stormwater Best Mana emen Z IL v been met and supporting documentation is attached. If a requirement has not been met, attach an explanation of (N.C. Department of Environmen Healt g t Practices manual t, hand Natural Resources, November 1995) and Administrative Code W why. Section: 15 A NCAC ?H .1008. Initial in the space provided to indicate the foliowin desi r ~ g gn equtnments have ~ Z LL been met and supporting documentation is attached. !Ja requirement has nor been met attach 0 Applicants Initials an explanation of OC why. ~ W ~ The temporary pao(controis runoff from the l inch storm event. W Q ~ Applicants Initials Z ?0 The basin length to width ratio is greater than 3:1. ~ The temporary pool controls runoff from the 1 inch to ~ N .1b The basin side slopes are no steeper than 3:1. s rm event. Z Q JO The basin length to width ratio is eater than 3:1. N A A submerged and vegetated perimeter shelf at less than 6:I is rovided. F ~ W p. JO The basin side slopes are no stee er than 3:1. ~ SEE LANDSCAPE P Vegetation to the permanent pool elevation is specified. NA p 0 J M ~_A submerged and vegetated enmeter shelf at less f\ P than 6:1 is provided. O O ,z~ Q An emergency drain is provided to drain the basin. N A The permanent pool depth is between 3 and 6 feet (required minimum of 3 feet), SEE LANDSCA E P N Vegetation to the permanent pool elevation is s ecified. N ~ o P - _ d The temporary pool draws down in 2 to 5 days. An emergency drain is provided to drain the basin. N N A The permanent pool depth is between 3 and 6 feet re aired minima j(__The forebay volume is approximately equal to 20%of the total basin volume. (q m of 3 feet}, a b The temporary pool draws down in 2 to 5 da s. ~;.i Sediment storage is provided in the permanent pool. ` J ,,~_The forebay volume is approximately equal to 20% of the total basin v Access is provided for maintenance. olume. ~ Sediment storage is provided in the permanent pool. ~/A A minimum 30-foot vegetative filter is provided at the outlet. A site specific operation and maintenance (0&M} plan is provided, Access is provided for maintenance. A vegetation managementlmowing schedule is provided in the 0&M plan. ~/A A minimum 30-foot vegetative filter is rovided at the out e P 1 t. Serni-annual inspections are specified in the 0&M plan. A site specific operation and maintenance (0&M) plan is provided. ,,111 uw°ttrrrrrrryiq A vegetation management/mowing schedule is provided in the 0&M Ian. \\`\\\\I r4r~~r. A debris check is specified in the 0&M plan to be performed aftereverystorm event. P saaaoe ~ ~~i Semi-annual inspections aze specified in the 0&M plan, °eo ' . d A specific sediment clean-out benchmark is listed (elevation or depth) in 0&M lan. P ~Ov o M~~~$ A debris check is specified in the 0&M plan to be performed after every storm event. ' ~_A responsible parry is designated in the 0&M plan. FORM SWG100 09'97 Page 1 of 1 A specific sediment clean-out benchmark is listed (elevation or depth) in 0&M tan. ? ~ ~_A responsible party is designated in the O&M tan. _ 4 P oW N N "o ~ ° FOR41 SWG100 09197 Page 1 of t o 9 0~ S "e~ u V/t~~ 00~ 'j~~o" Y 000 ~ WETLAND DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT ~ f j I! I I I I l l l I I N 11111\I IIIINIIII (NORTMLAKE VILLAGE -EXTENDED DETENTION WETLAND #2) WETLAND DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT (NORTHLAKE VILLAGE -EXTENDED DET N a The wetland detention basin s stem is defined as the wetland detention basin and retreatment incl di Y p u rig E TION WETLAND #3) o forebays. The wetland detention basin system is defined as the wetland detention basin and pretreatment includin Maintenance activities shall be performed as follows: g forebays. 1, After every significant runoff producing rainfall event and at least monthly: Maintenance activities shall be performed as follows: a. fns ect the wetland detention basin s stem for sediment accumulation erasion trash a cu l P Y c mu atlon, 1. After every significant runoff producing rainfall event and at least monthly: vegetated cover, and general condition. a. Inspect the wetland detention basin system for sediment accumulation, erosion, trash accumulation, vegetated cover, and general condition. b. Check and clear the orifice of any obstructions such that drawdown of the temporary pool occurs within 2 to 5 days as designed. b. Check and clear the orifice of an obstructions such th y at drawdown of the temporary pool occurs within 2. Repair eroded areas immediately, re-seed as necessary to maintain good vegetative cover, mow 2 to 5 days as designed. vegetative cover to maintain a maximum height of six inches, and remove trash as needed. 0 2. Repair eroded areas immediately, re-seed as necessary to maintain good vegetative cover, mow a 3, Inspect and repair the collection system (i.e. catch basins, piping, swales, tiptop, etc.) quarterly to vegetative cover to maintain a maximum height of six inches, and remove trash as needed. ~ maintain proper functioning. 0 3. inspect and repair the collection system (i.e, catch basins, piping, swales, tiptop, etc.) quarter) to Y maintain proper functioning. 4. Remove accumulated sediment from the wetland detention basin system semi-annually or when depth is reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of in an appropriate manner and shall be handled in a manner that will not adversely impact water quality 4. Remove accumulated sediment from the wetland detention basin system semi-annually or when depth is ° (i.e. stockpiling near a wetland detention basin or stream, etc.). Z reduced to 75% of the original design depth (see diagram below). Removed sediment shall be disposed of in an appropriate manner and shall be handled in a manner that will not adversely impact water uali q tY The measuring device used to determine the sediment elevation shall be such that it will give an accurate (i.e. stockpiling near a wetland detention basin or stream, etc.). depth reading and not readily penetrate into accumulated sediments. The measuring device used to determine the sediment a?evation shall be such that it will give an accurate de th readin a d n t g p g n o readily penetrate into accumulated sediments. U When the permanent pool depth reads 0.0 feet in the main pond, the sediment shall be removed. O For stormwater wetlands: If the elevation of the marsh areas exceed the ermanent ool elevation the P P , .When the permanent pool depth reads 0.0 feet in the main pond, the sediment shall be removed. ~ sediment should be removed to design levels. This shall be performed by removing the upper 6 inches of For stormwater wetlands: If the elevation of the marsh areas exceed the permanent pool elevation, the Q M soil and stockpiling it. Then the marsh area shall be excavated six inches below design elevations, Afterwards the stockpiled soil should be spread over the marsh surface. The soil should not be stockpiled sedtment should be removed to design levels. This shall be performed b removin the u er 6 inches of Q Y 9 pp tv ^ N for more than two weeks. soil and stockpiling it. Then the marsh area shall be excavated six inches below design elevations. U ° Afterwards the stockpiled soil should be spread over the marsh surface. The soil should not be stock filed W When the permanent pool depth reads 4.5 feet in the forebay and micro-pool, the sediment shall be for more than tw P ~ NN o weeks. ~ -o W t- t>0 x removed. 7 03 ~ _ ~p When the permanent pool depth reads 4.5 feet in the forebay and micro- ool, the sediment shall be z°o a ~°a P ~ ~ 4~ removed, W aw~^ Z Zo BASIN DIAGRAM Z Q2 I ul O ~ ~ON^ Q ~QoJ00 U V NN (fill in the blanks) BASIN DIAGRAM ~ wo~~ Z MM p Permanent Pool Elevation 733.0 0 Q' 1"~ J ~ 00 OO (fill in the blanks z ~ N ~ Q ~ o ~ w ~ ^ 0 Sediment moval EI.728.5 7 /o p Permanent Pool Elevation 734.0 Sediment Removal Elevation 733.0 0% Bottom E vation 727,0 5% Sediment moval EI.729.5 7 /o 0 Sediment Removal Elevation 734.0 0% Bottom E vation 728.0 5°/0 ° FOREBAY MAIN POND FOREBAY MAIN POND ^ o ~M 5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These N~' Q plants shall be encouraged to grow along the vegetated shelf and forebay berm. 5. Remove cattails and other indigenous wetland plants when they cover 50% of the basin surface. These ~ o Z IN- O Q~ plants shall be encouraged to grow along the vegetated shelf and forebay berm. = o- ~ U Wetland planting densities in the marsh areas should be maintained by replanting bare areas as needed, Wetland plants should be encouraged to grow in the marsh areas. s w~ Wetland planting densities in the marsh areas should be maintained b re lantin bare ~ - ~ Y P 9 areas as needed. Wetland plants should be encouraged to grow in the marsh areas. ~ ~ ~ c~ ~ ° 6. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment ~'x ~ ~ s~ ~ through the emergen;.y drain shall be minimized to the maximum extent practical. 6, If the basin must be drained for an emergency or to perform maintenance, the flushin of sediment ~ M N W ~ ~ 9 throu h the emer enc drain shall be minimi t ? ^ ^ ~ a ~ N N 9 9 Y zed o the maximum extent practical, ~ ° ~ W o~ ° ,Y, w ~ 7. A!I components of the wetland detention basin system shall be maintained in good working order, i1 oQ~~ go~~ 7 ~ M~~v O NmNN 7. All components of the wetland detention basin system shall be maintained in good workin order. g R I anal snraariars nr nthar stn ~rh eras that nrnviria rliffi ica flnw shall ha maintainarl avan, civ mnn+hc All accumulated sediment and debris shall be removed from the structure, and a level elevation shall be 8. Level spreaders or other structures that provide diffuse flow shall be maintained every six months. All maintained across the entire flow spreading structure. Any down gradient erosion must be repaired and/or accumulated sediment and debris shall be removed from the structure, and a level elevation shall be replanted as necessary. maintained across the entire flow spreading structure. Any down gradient erosion must be repaired and/or replanted as necessary. I acknowledge and agree by my signature below that I am responsible for the performance of the seven maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any J I acknowledge and agree by my signature below that I am responsible for the performance of the seven changes to the system or responsible party. maintenance procedures listed above. I agree to notify DWQ of any problems with the system or prior to any LU changes to the system or responsible party. Ca (D Print name: F, • L o e L L L Print name: T - 0.r o - LLC Title: o iec~ S cr E. Lin . ~-,ZA, alc.ewAitA ;lL I 4 $36y Addre: T r ou Lt Title: ki~xrjr--z-,,zA %-2 c c Address: aoo £ Lon La~.z"~ ~o e3Iq Phon : x.48- 8- $00 t Phone: c % - ' 00 Signatu Date: C Co cc Signature: Date: b 3 G J Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots have been sold and a resident of the subdivision has been named the president. Note: The legally responsible party should not be a homeowners association unless more than 50% of the 0 UJ lots have been sold and a resident of the subdivision has been named the president. I V t ti U1 (4- , L~ , a Notary Public for the State of Q, C-1 Y\ I, a a e a Notary Public for the State of , County of do hereby certify that . e L~ County of N 0-Q.G-" do hereby certify that i g personally appeared before me this 3 r day of X03 , and acknowledge the due h ec~.~ execution of the forgoing wetland detention basin maintenance requirements. Witness my hand and official personally appeared before me this rc _ day of u 0)-03, and acknowledge the due execution of the forgoing wetland detention basin maintenance requirements. Witness my hand and official seal, KAREN A. MOAENCY seal, Nohry PUW, MooomD County, MI Actin in DOW Co., MI My Commission Expires 12/27/2007 KAREN A. MORENCY Cia Notary pd*, Mwomb Coumy, MI Acft in lend Co., M1 My CW=95 on bcpm 121271!007 m 0 0 z W Z J SEAL ale SEAL My commission expires ~ i ri t)' MY commission expires G File No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001BMP1 SHEET: D7 OF D20 l DWQ Pr 'ect No, 021204 DWO Project No. 021204 DWQ Project No. 021204 of BIORETENTION AND NATURAL FLOODPLAtN AREA OPERATION AND MAINTENANCE AGREEMENT to ~ FOR NORTIILAKE PILLAGE ~ 0 DIVISION OF WATER QUALITY • BIORETENTK?N AREA WORKSHEET DIVISION OF WATER QUALITY • BIORETENTION AREAWORKSHEET DIVISION OF WATER QUALITY • BIORETENTION AREA WORKSHEET U U U i. PROJECT INFORMATION (please complete the following irttomnation): I. PROJECT INFORMATION (please complete the following information): I. I. PROJECT INFORMATION lease c late the followi information): tivities shall be erfomted as follows: = Z (P ~P n9 Maintenance ac p Project Name ; NORTHLAKE VILLAGE Project Name : NORTHLAKE VILLAGE Projer Project Name : NORTHLAKE VILLAGE Contact Person: JILL OUNGER Phone Number. (7031532-6163 Contact Person: JILL OUNGER Phone Number. (7031532-6163 Conta Contact Person: JILL OLINGER Phone Number. 703 532-6163 1 Immediatef after coin lesion of Bioretention Area lantin ~ a Y P p 9 For projects with multiple basins, spec~y which basin this worksheet applies to: ~ W 1 For projects with multiple basins, specrfy which basin this worksheet applies to: 1 For projects with multiple basins, spectiy which basin this worksheet applies to: 4 For pr n f ch da for fourteen consecutive da s. ~ a. Plant material shall be watered at the e d o ea y y ~ Pem~anent Pool Elevation VARIES tt. (elevation of the orifice irnert out) ~ U o Permanent Pool Eievalan 747.80 ft. (elevation of the orifice invert oat} Permanent Pool Elevation 770.10 ft. (elevation of the orifice irnert ouq Perm Temporary Pool Elevation 748.50 ft. (elevation of the outlet structure invert in) Temporary Pool Elevation 770.30 it (elevation of the outlet structure invert in) Temp Tem ra Pool Elevation VARIES ft, elevation of the ouflet structure invert in 2. When ever needed: N P~ ry ( ) o ~ z c 8ioretention Surface Area 2,536 sq. ft. 8ioretention Surface Area 2,14$ sq. ft. Biarel Biaretention Surface Area 3,842 sq. ft. a. Remulch any void areas. Drainage Area 1.37 ac. (on-site andoff-site drainage to the basin) Drainage Area 1.16 ac. (on-site and off-site drainage to the basin) Drain Drainage Area 1.96 ac. (on-site and oft-site drainage to the basin) ~ Im rvious Area 1.17 ac. {on•site and off-site drair~ge to the basin) Imper'ous Area 0.99 ac. (on-site andoff-site drainage to the basin) Imper pe Im envious Area 1.67 ac. (on-site and off-site drainage to the basin) b. Treat elf diseased trees and shrubs, g P W Z Rational C Coefficient 0.85 Rational C Coefficient 0.85 Rational C Coefficient 0.85 Ratio Size °k 5 % either5%in wlsand underdrain or 1°k in wlo c Replace any deficient stakes or wires ( ) Size °k 5 % (either 596 in wlsand under drain or 1°k in wlo} Size 5 °!o (either 5°k in wlsand under drain or 7°,6 in wlo} Size ° ~ I RETENTION AREA Inlet Veloci 5.0 fps # ACTUAL VELOGTY AT BIORETEN110N AREA Inlet 1 Inlet Veloary 4.2 ips ACTUAL VELOCTY AT B 0 ty 3. One ear after coin ?etion of Bioretention area lanti 5 Inlet Velocity ttAAX. 2.4 fps ~ ACTUAL VELOCITY AT BIORETENTION AREA Y P p ~ Q. Inlet flow depth 0.97 in WILL BE LESS DUE TO INLET DEFLECTOR Inlet flow depth 1.04 in WILL BE LESS DUE TO INLET DEFLECTOR Inlet f Inlet flow th 0.34 in WILL BE LESS DUE TO INLET DEFLECTOR _ ~ a. Remove stakes and wires during the sPnn9• ¦ ~ U Depth to Ground Water 17.3 ft. AND GRASS FlLTER STRIP Depth to Ground Water 8.30 ft. AND GRASS FlLTER STRIP Depth Depth to Ground water 7.90 ft. AND GRASS FlLTER STRIP oC ~ b Wanting Soil Infiltration Rate 1.5 in.lhr. (the soil layer down to 4 feet) Planting Soil Infiltration Rate 1.5 m.lhr. (the sal layer dawn to 4 feet) Planti Plantin Soil Infiltration Bate 1.5 inlhr. (the sal layer down to 4 feet) O ~ r o 9 = r ~ In-Situ Soil InfilVation Rate 1.00 in.ltmr. (the soil layer below 4 feet or below the sand bed} In-Situ Soil Infiltration Rate 1.02 inllmr. (the soil layer below 4 feet or below the sand bed) In-Sib In-Situ Soil InfilVation Rafe 1.00 in,lhr. (the soil layer below 4 feet or below the sand bed) 4. After every significant runoff producing rainfall event and at least monthly. U ~ N ~ a. Inspect the Bioretention and Natural Floodplain Areas for sediment accumulation, erosion, ~ ^ II. REQUIRED ITEMS CHECKLIST il. REQUIRED ITEMS CHECKLIST Ii. II. REQUIRED ITEMS CHECKLIST W g a trash accumulation, vegetated cover, overall general conditbn and repair as necessary. ~ e Initial in the space provided to indcate the following design requirements have been met and supporting documentation is attached. if a 5. Eve three months: Initial in the space provided to inrficate the following design requirements have treerm met and supporting documentation is attached. If a Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a Initial re uirement has not been met attach an explanation of wh . At a minimum, a complete stormwater management plan submittal includes ry q Y ~ requirement has not been met, attach an explanation of why. At a minimum, a complete stomrwater management plan submittal includes requirement has not been mret attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes requir a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet swcture details, a detailed a inspect and repair the collectionfdischarge systems (i.e, inl9lti, outfaUs, pipes, riprap, etc.) ~ to Z a worksheet for each BMP, design calculations, plans and specif~ations showing all BMPs and outlet structure details, a detailed a worksheet for each BMP, design calculations, plans and specifications showing alt BMPs and outlet structure details, a detailed a woi drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package wilt result in a request for drainage plan and a sully executed operation and maintenance agreement. An incomplete s~mittal package will result in a request for drain drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for ~ to maintain properfunctioning. W additional information and will substantially delay final review and approval of the project additional information and will substantially delay final review and approval of the protect adtliti~ additional information and will substantially delay final review arid approval of the project W Q licants Iretial licants Initials Z licants Irutial5 6, Every six months: N No vertical sand bed is proposed No vertical sand bed is proposed _ No vertical sand bed is proposed 0 The bioretenGon area is at least 40 feet by 15 feet. 0 The biaetention area is at least 40 feet by 15 feet. 0 The INaetention area is at least 40 feet b t5 feet, a. Remove accumulated sediment and debris from the Plunge Pool and repair andlor replant 4. Y 0 Sheet lbw is 'ded at inlet. ~ 0 Sheet flow isprovided atinlet. P~ 0 Sheet flow is rowded at inlet. any down gradient erosion. P ^ g 0 Water table depth is greater than 6 feet. D Water table depth is greater than 6 feet. _ D Water table depth Is greater than 6 feet. N " in is rowded b. Remove and replace all dead and diseased vegetation consrtiered beyond treatment in the Minimum of 6 pond g p Minimum of 6" ponding is provided. Minimum of 6" ponding is provided. n 4 s. Bioretention areas. Plants are to be replaced only from March 15 to April 30 and from a The ponded yea vnl draw down in less the day r 1 to November 30. z The ponded area will draw down in less Phan 4 days. The ponded area will draw down in less than 4 days. _ Wanting soil infltraticn rate is greater than 0,52 iNhc Planting soil infiltration rate is greater than 0.52 inlhr. _ Plantin soil infiltration rate is greater than 0.52 iriJhr. Octobe 9 The in-situ soil infilVaGon rate is greater than 0.2 inlhc D The in•situ soil infiltration rate is greater than 0.2 inlhr. _ The in-situ soil infiltration rate is rester than 0.2 inltir. 9 A planting plan with species and densities is provided. A planting plan with species and densities is provided. A lantin Ian with s ies and densities is rovided, 7. Once a year: P 9P P~ P Mulch layer is specified in plans, Mulch layer is specified in plans. _ Mulch layer is specified in plans, Planti soil meets minimum sail ecifications NCDENR Stomrn~ater Best Maria event a. During the spring months, add mulch as necessary. J D Wanting sal meets minimum soil spec cations (NCDENR Stomnwater Best Management D Wanting sal meets minimum soil specifications (NCDENR Stom>water Best Management _ ~ n9 sP ( 9 Practices Manual, April 1999) ?uuuuu,iu,,,~~~ Practices Manual ril 1999 Practices Manual, April 1999) ,M ) JQ Plan details for the bioretenGon area provided. Wan details for the bioretention area provided. Plan tails for the bioretention area rovided. 8. Every two or three years; Plan details for the inlet and outlet are provided. Wan desalts for the inlet and outlet are provided. Plan details fa the inlet and outlet are provided, a. Remove old mulch layer before applying new mulch layer. °°°°0p00° rAn operation and maintenance agreement signed and notarized by the responsible party is provided. An operation and maintenance agreement signed and notarized by the responsible party is provided. _ An operation and maintenance agreement signed and notarized by the responsible party is provided. : v ° 0 • ~ ° n °°°`'c~ ~ e y~° Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains , rJ ey ~ Ze ~ Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains Please note that underdreins beneath the planting soil are acceptable in the Piedmont and Mountains Weas I acknowledge and agree by my signature below that 1 am responsible for the performance of the seven e maintenance procedures listed above. I agree to notify DWQ of any problems with the system a prior to any S ;~d changes to the system or responsible party. ~ ° DWQ Project No. 021204 DWQ Project No. 021204 021204 Print name; Dennzs Hecht agent for and on behalf of TRG-Charlotte L'LC ~~'pnprnmimm~t~~a~~~ DWQ Protect No. Title' Authorized Signatory, Vice President, Legal Services 6 Partnership Administration DIVISION OF WATER QUALITY • BIORETENTION ARF~~ WORKSHEET DIVISION OF WATER QUAUTY • BIORETENTION AREA WORKSHEET DIVISION OFWATERQUAUTY • BK)RETENTIONAREAWORKSHEET Address: 2ao E. Lon~Lak~Road, suite 300 Bloomfield bills. M:t 48304 - a 0 Phone' 248.758-68 0 I. PROJECT INFORMATION (please complete the following information): I. PROJECT INFORMATION (please complete the following information); I. I. PROJECT INFORMATION (please complete the following infomtatlon): Project Name ; NORTHLAKE VILLAGE Project Name : NORTHLAKE VIU.AGE Proje~ Project Name : NORTHLAKE VILLAGE Signatur : ~ Contact Person: ~NLL OUNt~R Phone Number. (7031532-6163 Contact Person: JILL OUNGER Phone Number. f 1031532-6163 Conti Contact Berson: JILL OIJNGER Phone Number. i 7031532-6163 , Date: ~ For projects with multiple basins, speclty which basin this worksheet applies to: F r r 'acts with mul ' le basins s ec which basin this worksheet a lies lo: For projects with multiple basins, specfly which basin this worksheet applies to: 5 For pi o P of tiP , P tiY pP Permanent Pool Elevation 762.60 ft. (elevation of the orifice invert out} Permanent Pool Elevation 76210 ft. (elevation of the orifice irnert out) Perm Permanent Pod Elevation 759.60 tt. elevation of the orifice irnert out Note: The legally responsible party should not f>e a homeowners assoelatlon uMess more than 50% of the Temporary Pool Elevation 16280 ft. (elevation o} the outlet structure invert in) Temporary Pool Elevation 76230 ft. (elevation of the outlet sweture Invert in) Term ( ) rU f subdivision teas been named the resident. Temporary Pod Elevation 759.80 ik (~eva6on of the outlet structure invert in) lots have been sokf and a resMe o the p o f c of Public for the State of ~i th ~ a, I, 0.t eh h , a N any 8ioretention Surface Area 1,574 sq. ft, 8ioretention Surface Area 833 sq. ft, Biore Bioretention Surface Area 1,541 sq. ft. Drama a Area 0.85 ac. (on-site and off•site dial a to the basin) Drainage Area 045 ac. (on-site and off•site drainage to the basin) Drain 9 ~9 o o hereb certif that ~ ' S~ . H e C4. i 0.73 ac. on-site and fE i th I Count of 1~ SAC rnb , d y y Dra Wage Area ( o s to drainage to a bas n) y Impervious Area 0.12 ac. (on-site and off-site drainage to tl~ basin) Impervious Area 0.38 ac. (on•site and off-site drainage to the basin) Impel impervious Area 0.62 ac. (on-site and off-site drainage to the basin) ersonall a eared before me this K} _ day of u ~ ~ ~po3 ,and acknowledge the due Rational C Coefficient 0.85 p y pp Rational C Coefficient 0.85 Rational C Coefficient 0.85 Ratio Size % 5 (either 5°k in wlsand under drain or l% in wlo) execution of the forgoing wet [wetland) detention basin maintenance requirements. Witness my hand and Size 5 % (either 5% in wlsand urs~r dram or 796 in wlo) Size °h 5 % (either 5°k in wlsand under drain or 7°6 in wlo) Size o official sea(, ~ ~ Inlet Veioci 4.5 f s # ACTUAL VELOCTY AT BIORETENTION AREA Inlet' InletUelocity 4.2 fps ACTUAL VELOCITY AT BIORETEN110N AREA h R Inlet Velocity 4.1 fps ~ ACTUAL VELOCITY AT BIORETENTION AREA a Inlet flow depth 1.20 in WILL BE LESS DUE TO INLET DEFLECTOR Inlet flow depth 0,90 in WILL BE LESS DUE TO INLET DEFLECTOR Inlet Inlet flow depth 0.79 in WILL BE LESS DUE TO INLET DEFLECTOR Depth to Ground Wafer 12.10 ft. AND GRASS FlLTER STRIP Depth to Ground Water 8.50 ft. AND GRASS FlLTER STRIP ~Pti Depth to Ground Water 8,10 ft. AND GRASS FlLTER STRIP o Planting Soil Infiltration Rate 1.5 in.mr. (the sdl layer down to 4 feet) Wanting Soil Infiltration Rate 1.5 in.mr. (the soil layer awn Go 4 feet) Wanting Sail Infiltration Rate 1.5 m.lhr. (she soil layer down to 4 feet) Want In-Situ Soil Infiltration Rate 1.50 in,mr, (the soil layer below 4 feet a below the sand bed) In-Situ Soil Infiltration Rafe 1.05 in.lhr, (the soil Payer below 4 feet or below the sand bed) In-Sit In-Situ Soil Infllration Rafe 0,95 inltir. (the soil layer below 4 feet or below the sand bed) d II. REQUIRED ITEMS CHECKLIST II. REQUIRED ITEMS CHECKLIST Il. Il. REQUIRED ITEMS CHECKLIST Z Initial in the space provided to indcate the following design requirements have been met and supporting documentation is attached. !f a Initial in the space provided to indate the following design requirements have been met and srppoiiing documentation is attached, if a Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached, If a Initial requirement has rat been met attach an explanation of why. At a minimum, a complete stormwater management plan subrrfttal includes N requirement has not been met, attach an explanation of why. At a minimum, a complete stomwvater management plan submittal includes requirement has not been met attach an explanation of why. At a rt~nimum, a complete stomnvater management plan subnultal includes requi a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed a worksheet for each BMP, deign calculations, plans and specfications showing all BMPs and outlet sUuclure details, a detailed a wo a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed SEAL drainage plan and a fully executed operation and maintenance agreement. An incomplete stdxrmittal package will result in a request for drainage plan and a fully executed operation and maintenance agreement, An incomplete srthmitfal package will result in a request for drain drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for ~ additional information and will substantially delay final review and approval of the project additional information and vnll substantialy delay final review and approval of the protect additl additional information and will substantially delay final review and approval of the project My commission expires licants Initials licants Initials scants Iratials KAAEII a No vertical sand bed is proposed No vertical sand bed is proposed _ No vertical sand bed is proposed ~ Q i° 0 The bioretenGon area is at least 40 feel by 15 feet 0 The biaetenGon area is at least 40 feet by 15 feet. _ 0 The bioretenUon area is at least 40 feel b 15 feet ~ ~ end ~ o - Y Mp CamnrgbA ~ 1?f1T>'1t10i' Q ~ N 0 Sheet flow is provided at inlet ~ 0 Sheet flow is provided at inlet _ 7-Sheet flow is provided at inlet. N o 0 Water table d this rester than 6 feet. U } ~ D Water tabled this rester than 6 feet. D Water table depth is greater than 6 feet. ep 9 - eP 9 Z N c Minimum of 6' ponding is provided. ~ o: ~ N Minimum of 6" ponding is provided. Minimum of 6" ponding is provided. _The ponded area will draw down in less than 4 days. The ponded area will draw down in less Phan 4 days. _ The nded area will draw down in less than 4 da s. ~ w ~ x ~ ~ ° x po Y 7 0~ ¢ Z Z wo Wanting soil infiltration rate is greater than 0.52 inlhr Planting soil irtfiitration rate is greater than 0,52 inlhr. _ Plantin soil infiltration rate is greater than 0.52 inlhr.u z w ~ o g W ~Z~~ ~ ~a~M The in•situ soil infiltration rate is greater than 0.2 iNhr. The in-situ sot! infiltration rate is greater than 0.2 inlhr. The in-situ soil infiltration rate is rester than 0.2 inlhr. ~ .•n ~i ~ ~ ~ g U a w~~ Z o~~r, W O Q I I _A planting plan with species and densities is provided. A planting plan oath species and densities is provided. A planting plan vnth species and densities is provided, Z z J o aa°ioaio to V Mulch layer is specified in plans, ~ ~ - Z ~ Mulch layer is specified in plans. Mulch layer is specified in plans, _ Planti soil meets minimum soil specifications (NCDENR Stom~water Best Management ~ ~ n9 M V M .1 D Planting sal meets minimum sail specifications (NCDENR Stomnwater Best Management D Planting soil meets minimum sal specifications (NCDENR Stormwater Best Management _ Practices Manual, April 1999) Practices Manual, April 1999) Practices Manual, April 1999) a ~ ~ 3 N J Wan details fa the bioretention area provided. JQ Plan details for the bioretention area provided. _ JO Plan details for the bioretentian area provided ~ ~ Wan details for the inlet and outlet are provided. Wan details fa the inlet and outlet are provided. flan details for the inlet and out~l are provided. An operation and maintenance agreement signed and notarized by the responsible party is provided. An operation and maintenance agreement signed and notarized by the responsible party is provided. _ Ar operation and maintenance agreement signed and notarized by the responsible party is provided. Please note chat underdrains beneath the planting soil are acceptable in the Piedmont and Mountains Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains Please note that underdreins beneath the planting soil are acceptable in the Piedmont and Mountains Plea; g o M ~w M ~ M ~i.l p Ih ~ M 021204 DWQ Project No. 021204 DWQ Pr~ect No. N ~ ~ N ~ .Z N QQ H U o`-' DIVISION OF WATER QUALITY • BIORETENTK)N AREA WORKSHEET DINSION OF WATER QUALITY • BIORETENTK)N AREA WORKSHEET U ~ ~ _U x W~ x - tai I. PROJECT INFORMATION {please complete the fallowing information): I. PROJECT INFORMATION (please complete the following information): NN ~ ~ ~~8~ Project Name : NORTNLAKE VILLAGE Project Name : NORTfiLAKE VILLAGE U oC F- ~ z ° ~ tO1~ V~ p I I 9 oio oio Contact Person: Jlll OUNGER Phone Number (7031532-6163 Contact Person: JIU. OUNGER Phone Number. (1031532-6163 Q ~y,~ ~~MM Q Nwt1-)u") h" ZC9~~ ~ V .QILNN For projects with multiple basins, specfly which basin this worksheet applies to: 3 for projects with multiple basins, specity which basin this worksheet applies to: - 2 o ~-pp~p~p}p-pepp~er W W o 0 Permanent Pool Elevation 767.50 ft. {elevation of the c;nfice invert out) Permanent Pool Elevation 761.60 ft. (elevation of the once irnert out) O¢NN OO~N M l~ w„tii ~ N m...~~ Temporary Pool Elevation 768.00 ft. (elevation of the cutlet structure invert in) Temporary Pool Elevation 761.80 ft. (elevation of the outlet Structure invert in) Bioreteniion Surface Area 2,038 sq. ft, eioretention Surface Area 944 sq. fi, Drama a Area 1.06 ac. (on•site and off•site drainage to the basin) Drainage Area 0.51 ac. (on-site and off•site drainage to the basin) g I rvious Area 0.43 ac. on•site and off-site drama a to the basin Impervious Area 0.90 ac. (on•site and off•site drainage to the basin) ~ { 9 J Rational C Coefficient 0.85 Rational C Coefficient 0.85 Size % 5 % (either 5% in wlsand under drain or 7% in w/o) Size % 9 % (either 5% in wlsand under drain or 7% in w!o) NMI Inlet Velocity 5.9 fps ACTUAL VELOCTY AT BIORETENTION AREA Inlet Velocity 4.4 fps # ACTUAL VELOCITY AT BIORETENTION AREA # LU 0 Inlet flow depth 1.62 in WILL BE LESS DUE TO INLET DEFLECTOR Inlet flow depth 1.04 in WILL BE LESS DUE TO INLET DEFLECTOR Co Depth to Ground Water 8.20 ft. AND GRASS FILTER STRIP Depth to Ground Water 8.04 ft. AND GRASS FILTER STRIP Planting Soil Infiltration Rate 1.5 in./hr. (the soil layer down to 4 feet) Planting Soil Infiltration Rate 1.5 in./hr. (the sal layer down to 4 feet) ~ v In-Situ Soil Infiltration Rate 1.02 inJhr. (the soil layer below 4 feet or below the sand bed) In-Situ Soil Infiltration Rate 1.05 in./hr. (the soil layer below 4 feet or below the sand bed) W a W Z II. REQUIRED ITEMS CHECKLIST II. REQUIRED ITEMS CHECKLIST Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a Initial in the space provided to indicate the following design requirements have been met and supporting documentation is attached. If a mi requirement has not been met, attach an explanation of why. At a minimum, a compele slormwater management plan submittal includes requirement has not been met, attach an explanation of why. At a minimum, a complete stormwater management plan submittal includes V! a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed a worksheet for each BMP, design calculations, plans and specifications showing all BMPs and outlet structure details, a detailed O ~ drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for drainage plan and a fully executed operation and maintenance agreement. An incomplete submittal package will result in a request for > j z additional information and will substantially delay final review and approval of the project additional information and will substantially delay final review and approval of the project ADr)licants Initials Applicants Initials No vertical sand bed is proposed No vertical sand bed is proposed 0 The bioretention area is at least 40 feet by 15 feet 0 The bioretention area is at least 40 feet by 15 feet. O LLJ = ~lm 0 Sheet flow is provided at inlet. 0 Sheet flow is provided at inlet. JV Water table depth is greater than 6 feet. 0 Water table depth is greater than 6 feet. 3 ~ v Z Minimum of 6" ponding is provided. Minimum of 6' ponding is provided. -10 'lo ponded area will draw down in less than 4 days. The ponded area will draw down in less than 4 days. Planting soil infiltration rate is greater than 0.52 inlhr. Planting soil infiltration rate is greater than 0.52 in/hr. Z °J U. 0 The in-situ soil infiltration rate is greater than 0.2 in/hr. 110 The in-situ soil infiltration rate is greater than 0.2 inlhr. 110 1.14 A planting plan with species and densities is provided. A planting plan with species and densities is provided. (0) )OM Mulch layer is specified in plans. Mulch layer is specified in plans. Planting soil meets minimum soil specifications (NCDENR Storrnwater Best Management D Planting soil meets minimum soil specifications (NCDENR Stormwater Best Management 4C M p. a Practices Manual, April 1999) Practices Manual, April 1999) ca IN= E5 JO Plan details for the bioretention area provided. J0 Plan details for the bioretention area provided. Plan details for the inlet and outlet are provided. , 42 Plan details for the inlet and outlet are provided. An operation and maintenance agreement signed and notarized by the responsible party is provided. An operation and maintenance agreement signed and notarized by the responsible party is provided. 1/0 Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains Please note that underdrains beneath the planting soil are acceptable in the Piedmont and Mountains oC CC O z LL W z J V W SHEET: D7FOF D20 File No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/030018MP3 ~ ~ H ~ ti U U U _ ? NUMBER AND SIZE OF PLANT SPECIES: 3' , , U A MINIMUM OF THREE SPECIES OF TREES AND THREE SPECIES OF SHRUBS SHOULD BE p ~ (CURB OPENING) p SOW PAVEMENT Y 810RETENTION AREA LIMIT Fl.OW . a SELECTED TO INSURE DIVERSITY. HERBACEOUS GROUND COVERS ARE IMPORTANT TO i , W PREVENT EROSION OF THE MULCH AND THE SOIL LAYERS. ~ Q NTION AREA ARE: ~ V ° THE SIX MAJOR COMPONENTS OF THE BIORETE N THE NUMBER OF TREE AND SHRUB PLANTINGS MAY VARY, ESPECIALLY IN AREAS WHERE ~t AESTHETICS AND VISIBILITY ARE VITAL TO SITE DEVELOPMENT, AND SHOULD BE ` ' GRASS BUFFER STRIP Z O DETERMINED ON AN INDIVIDUAL BASIS. ON AVERAGE, 1,000 TREES AND SHRUBS 4s B SHOULD BE PLANTED PER ACRE. TWO TO THREE SHRUBS SHOULD BE SPECIFIED FOR • ' ' ' • NG AREA N PONDI EACH TREE (2:1 TO 3:1 RATIO OF SHRUBS TO TREES). • • • • 1.5'(MIN. PLANTING SOIL ~ N 2 - ~ _ w.... 2 ~ - - _ . - ~ SAND BED Z PLAN LENGTH ~ ~ W . . , o ORGANIC LAYER OR MULCH z ~ AT INSTALLATION, TREES SHOULD BE 2.5 INCHES IN CALIPER, AND SHRUBS 3 TO 4 3' s•v to? ~ ao>•ror • • 0 ~ PLANT MATERIAL Z ~ FEET IN HEIGHT OR 18 TO 24 INCHES IN SPREAD. GROUND COVER MAY BE AS SEED urZ' I/2 Mrn. Rad. rrr Na. t aaNG • S • ~ p OR PREFERABLY, PLUGS. THE RELATIVELY MATURE SIZE REQUIREMENTS FOR TREES o • ' • 0 0 ~ - ~-0 ~ -2 GRASS BUFFER STRIP 2 M AND SHRUBS ARE IMPORTANT TO ENSURE THAT THE INSTALLATION OF PLANTS ARE ~ ~ ' ~•~it' V P ANSPIRATION wal:•o.c. ~•ataa ~ ~ V o ~ ~ s o0 READILY CONTRIBUTING TO THE BIORETENTION PROCESS (I.E., E A OTR SECTtoN p•p • ~ - • • , ' ' • THE GRASS BUFFER STRIP IS LOCATED BETWEEN THE IMPERVIOUS SURFACE AND THE ~ O ~ ,.7N • 2 MIN...... a POLLUTANT UPTAKE). 1/~.' ~ + I~~. BIORETENTION AREA. IT FUNCTIONS TO REDUCE THE RUNOFF VELOCITY AND FILTER = i • . ~ ~ 'i:r PARTICULATES FROM THE RUNOFF PRIOR TO DISCHARGING TO THE BIORETENTION AREA. U CUR ~ N ~ ~ l 4.6 Recommended Tra and Shrob S cin Tabe Pa 8 SECTION'8.9` ~ ~ Q O FLOW FLOW PONDING AREA ~ ~ ° Tree S is Slwb Spacing Total Density 1~ g LL (feet feet stemslacre THE PONDING AREA OVER THE ROOT ZONE PROVIDES FOR SOME SURFACE STORAGE OF W Maximum 19 12 400 THE STORM WATER RUNOFF AND PROVIDES FOR THE EVAPORATION OF A PORTION OF ~ ~ N Z 1000 Ave a 12 8 THE RUNOFF. SETTLING OF THE PARTICULATES THAT HAVE NOT BEEN FILTERED BY THE c~ 1 1250 ~ c,~q ~ r~r GRASS BUFFER OR THE SAND BED OCCURS IN THE PONDING AREA. W Q Z ~ N ~ N ~ NOT TO SCALE ~ Z ~ a ~ ORGANIC LAYER OR MULCH ¢ W ~ 0 J c~ 110N AREAS MUST MEET ALL MINIMUM GUIDELINES AS SPECIFlED IN THE NCDENR BIORETEN THE ORGANIC LAYER PROVIDES A MEDIUM FOR BIOLOGICAL GROWTH AND ~ n O O ~ ~ STORMWATER BEST MANAGEMENT PRACTICES MANUAL, APRIL 1999. BIOCk10D • J.1 WATER DECOMPOSITION OF ORGANIC MATERIAL. THE ORGANIC OR MULCH LAYER ON THE _ U cv o MAX. PONDED CONSTRUCTION ~ BIORETENTION AREAS SHALL BE IN CONFORMANCE WITH THE NORTH ISOMETRIC DEPTH 6 INCHES SURFACE OF THE SOIL HAS SEVERAL PHYSICAL AND BIOLOGICAL FUNCTIONS. THE R UND COVER OR ( ) G 0 .SURFACE LAYER ACTS AS A FILTER FOR POLLUTANTS IN THE RUNOFF AND PROTECTS CAROLINA STORMWATER BEST MANAGEMENT PRACTICES HANDBOOK (APRIL 1999). SEE MULCH LAYER THE SOIL FROM DRYING AND ERODING AND SIMULATES THE LEAF LITTER IN A FORST CHAPTER 4 FOR FURTHER DETAILS AND SPECIFlCATIONS. R ~ 3:1 MAX. ~ UR8 COMMUNITY. THE ORGANIC OR MULCH LAYER PROVIDES AN ENVIRONMENT FO N T AND OTHER POLLUTANTS. ~ (TYp,) FLOW MICROORGANISMS TO DEGRADE PETROLEUM-BASED SOLVEN S PLANTING WILL BE SELECTED FROM PLANTS LISTED IN TABIE 2.2 ABOVE (SOURCE: STORMWATER FLOW BEST MANAGEMENT PRACTICES, NCDENR, APRIL 1999) BASED ON HYDROLOGICAL CONDI110NS AND a~. _ 11ggpmunu «ggiqi AVAILABILITY. N.T.S. . _ , . \\\\\1 ri,,~~ DE SAND 8E0 _ - . ROPOSED GRA _ _ - ~ _ . _ - ,00"0,000 - _ ^ - ' ' ' . - . ' . . - . ' - - ORETENTION AREA. IT PROVIDES ~ Oo e0 7 - . • - . , - ~ • - ND BED IS LOCATEC AT THE BOTTOM OF THE BI ; ~/0° o - THE SA ~ p Sq ooYN SE 1N I RETENTION SNUB SPBCI63 4', „ Table 4.3 RECOMMENDED PLANT SPEC)FS FOR U B 0 O = . • ' _ - - - - - - - - ` - - AND AUGMENTS THE ABILITY OF a o ~ oho _ _ , , _ , . _ 4 MIN._ , , _ , , _ , , _ , , _ , . ' FOR DRAINAGE AND AERATION OF THE PLANTING SOIL, TRECEIVES. _ ~Ze~_ Spada Moratrue Regime Tolerance Motpbology Geaerd _ , _ , , _ ,PLANTING SOIL: , , _ . , _ , , _ , , ~ THE BIORETENTION AREA DRAIN THE RUNOFF I : U,a ao 0 o~ O o00~= ehaAa~eilaea 32'0" Scienr Name IAdicatat Habigt PoAdin Salt O)U Mews hrsecta Exposure Fomr Hdght Root Naive Wildlife _ _ _ , . _ _ _ _ , . _ _ _ _ _ _ THE SAND SHALL BE FREE OF DELETERIOUS MATERIAL AND ROCKS GREATER THAN 1 ~Y o0 00 ~ g s em 4'-0" CommoA Name $tadra Oreaae - ' ' - ' ' ' ' ' - ' ' - ' ' - • ' - ' " 4" PEA GRAVEL ALL BE .ASTM STD C-33 CONCRETE SAND. %~0 °0o eo°° ~ o~` ^,~t,.,,; : ~ ai ,;;x.~,,; , „ 6 1/ INCH IN DIAMETER. SAND SH 00 F &rbuis koreano FAC Matic 2•d H H H M SAA to pafial Ovd dAUb 4;. Shepow No Low 8', 6" '1.'.t,,o,•~"~~ *.~:y.,.Y' it .Ya,\,'~~V't~,•.M i4}`•`1'~.:y<' ~~I ~1~\\\\ Shade 8erbafa daabt U PAC Maio 1.1 H H M M Sun Rormdad, S•7' Shalhnr No Med. rrrrrr411111111111111111\1111\` 0000oooooaooooo0 00000 000000 000000000 00000 000000000 0 000000 0 0 0 0000000 00 Iapamae barberry Broad deAa 000 00 00 0000 ahmb FLOW 6" PERFORATED X57 STONE ~ Clediro a la PAC Maic to 1.4 H - H Sun to partial Ovoid shrub 611' Shallow Ya Med. sweet wet mwc Shade 1 : ~ I S PLANTING SOIL o PVC PPE Corms Srotoaifim FACW Medc = 1•ti N H H M SuA a Shade Arduug, 1419' Shallow Yes High BIORETENTION AREA THE PLANTING SOIL IS TFIE REGION WHICH PROVIDES THE SOURCE OF WATER AND tedoakrdo S FIOVy Euoxynuu sbrw FAC Mak I.2 H H H M SAn or shade Plat, chose, 5•? Shallow No No NUTRIENTS FOR THE PLANTS TO SUSTAIN GROWTH. THE VOIDS IN THE SOIL ALSO horirsrnw INLET DEFLECTOR PROVIDE FOR STORMWATER STORAGE. CLAY PARI1CLES THAT COMPOSE A PORTION OF • (SEE DETAIL THIS Eaorq+aaseu?opaeres FAC Mesic 1-2 M M M M SAntopartul Up•rrghtdeme Ia12' Shdlow No No SHEET) - THE SOIL ADSORB HEADY METALS, NUTRIENTS, HYDROCARBONS, AND OTHER rb.de and sbaab NOT TO SCALE POLLUTANTS. Namamttis vlrgiaia FAC Mesic 1.4 M M M M SAA a Shad Veae•tfke 4.6' Shallow Ya Low wttdt•hasd NyPnkuardtns{lioraar FAC Maic 2.4 H M M H Sun OvoidSt~Ab 3.6' Shallow Ya Mad PLANT MATERIAL . oomnson St. John's wort ~ THE RQLE OF PLANT SPECIES IN THE BIORETENTION CONCEPT IS TO USE NUTRIENTS AND Z•4 L M H Santo S 611' Shallow Ya High AND GUTTER PACW Marc ~ STANDARD CURB ~ MODIFIED 8 asi Maio ~ sbNb N.T.S. OTHER POLLUTANTS AND TO REMOVE WATER THROUGH EVAPOTRANSPIRATION. A 1tet veticiftait PACW Meaic to 1.4 L M H sun to partial Spreading 611' Shalhsw Ya High NOT TO SCALE FOREST COMMUNITY STRUCTURE IS REPLICATED TO AVOID MONOCULTURE SUSCEPTIBILITY wit Meaic sun Juaiperus coauaurrit FAC [ky Maic 1-2 M H H M•H Sun Motmded b 3.6' Deep No High TO INSECT AND DISEASE INFESTATION AND TO CREATE A MICROCLIMATE WHICH IS wMes;D ' NOTE: THIS CURB AND GUTTER SYSTEM IS TO BE I RESISTANT TO THE STRESSES TO WHICH LANDSCAPED AREAS IN URBAN AREAS ARE Z SUBJECTED, INCLUDING HEAT AND DRYING WINDS. ° cnmaan' M . H H M•N Snn Maned a3' Dap No High USED IN THE BIO-RETENTION AREAS ONLY a ]unipcrushoritortwlJs FAC Dry Marc i•2 "liar Harbor" to Mesic U !n W ° tJndero i)anroia FACW Mede to 1~ N H Sun Upright 6l2' Dap Ya High wa Medc Myricro peru?syl?nalaa FAC Medc 2.4 H M M H Sun to pardd R 68' Shallow Ya High GENERAL GUIDELINES ~ amm MINIMUM SIZE: Z I THE FOLLOWING DIMENSIONS ARE RECOMMENDED FOR BIORETENTION AREAS: daub sae w lira FAC Dry Maic 1.4 M H Sun Uprigia dwb 611' Shallow Yes Med ~Y rP I to wet ainebark - T NAL BIORETENTION AREA SHOULD BE 15 FEET. ~ AVERAGE WIDTH OF A FUNC 10 Medc A WIDTH OF 25 FEET IS PREFERABLE. g Viburnwrt irwidcs FACW Maio 2-d H H H H Sun to panda Raun~d, 68' Shallow Ya High cars nordrem wild raisin ~ snn coAgacted U - AVERAGE LENGTH SHOULD BE 40 FEET. FOR WIDTHS EQUAL OR GREATER p _ drub THAN 20 FEET THE LENGTH OF THE BIORETENTION AREA SHOULD BE AT ~ Vlburnuar dcAwmm FAC Mesic 2.4 H H H H Sus to partid Upright, mr~i• &10' Shallow Yes High LEAST TWICE THE WIDTH. Q M ao 0 arrow-wood amr stemmed ahaub Vtbanrunrltrua o FAC Mesic 2.4 H H H H Suntopartia Uptight,muhi• 8-IO' Shdllow Ya High B Q n o N Aamr am aterAmal drub -THE PONDED AREA SHOULD HAVE A MAXIMUM DEPTH OF 6 INCHES. U O Z w ~ - U ~ ~N ~ THE PLANTING SOIL SHOULD HAVE A MINIMUM DEPTH OF 4 FEET. (yJ F~ W~ X ~ ~aO0 X Table 4.4 RECOMMENDED PLANT SPECIES FOR USE IN 9IORETENTION - TREE SPBCIES g MAluu~ Tolerance Morphology Genera} N ~~zw 14~ Z~w°° ~ BIORETENTION AREAS WILL BE LIMITED TO DRAINAGE AREAS LESS THA a ~a~M f3ruacteristics 5 ACRES IN SIZE. W ~ ~Z ~ ~ ~ V W acwa~~ Z Z~N~ pal Z QZ I I p~ I I Habitat Pondi Snit OiU Mews lASats Exposwe Form Height Root Native Wildlife s<~a Name Ag ON #1 ~ BI 111 NN I OF THE BIORETENTION AREAS SHOULD BE 5% WITH SAND BED TO 7% ~a ~ ~ v ~ THE SZE ( ) - Z . M Common Name Status Gteaae S RATIONAL "C" ~ W ° tO ~ ~ ~ 00 °0 (WITHOUT SAND BED) OF THE DRAINAGE AREA MULTIPLIED BY THE II~,..II PAC Matic • 4.6 H H N H Puna Sao Single to multi- Sa70' Shallow Yes High Accr rAbrua red le. H stemtra ~ ~~MM ~ V O>MM COEFFICIENT. ~,Q~n 3 Nw~,°,, Ametanelrieroanadensis FAC Mesic 2.4 H M H Partial Sun Single to multi• 3a50' Shdbw Ya High stem tra 7 &Arla nisra PACW Mesic to 4.6 M M H Partial Srm SiAgk to mulCr Sa15' Shdbw Ya Mad dyer bitch H alas tea ~ Bran l tie FAC Xeric• 4•b H H M H Partid Sun Single to Aal6• 35.50' Shalow Ya High ~ ~ stem Ace to ~ birds H c (~----D Fraxtrws amaricaao FAC Mesic 2.4 M H H H Swr loge tta Sa80' Dap Ya Low whin mh ~----~--•O o J o ° Pattie! Sun tra 40.65' Shallow Yea Low ~ FrasinrraPeaasyfvanica FACW Maic 46 M H H H Large ash to ;~~r o o ~ O . S0.g0' Shallow Na Low Q"-~ o bAoba FAC Marc 1~ H H H H Sum Large tra - ' ~;g~ . ~ ro -••~--r ~ ~ IU ~ M t~ ~3--. v oM0 Maidea4arr • M M SuA SmaO SaTT Shallow Yess Law FAC Marc 2.4 H lJ1l-U r f~ ."a ~ _ Cladisuatriacmrthos 1 ;>'a r,, ~ ~ r i ~ loge tra to deep ~ , ~ x f lane st t ~ ~~r~a w ~ ~r ~ . ~ ~ ~ -ter s =z1 ~ ~ ~ ° C~ U U l~ ~a c"^~'' , Ya Y s~ 4 . 'f+ ~ i. i a t ; - U - Juaiperuavirgiarana FACU Mesic- 2.4 H H H Srm DeAaesingle 3aT5' Taproot ery x eastern led ands Xeric stem iroe t. tr Y y, .:F h ~'~';5 t~ J vTia~ to Q Q ~ H H H Sim Round, dau 20.3()' Shdbw No No ~ Koelrcuuda panicaJare FACU Mesic 2-4 H + I ~i1JOB JOO ~+2~0 ZJpp~ shade tree deatain tree Sun tra Sa70' Yea Hi 4.6 H H H M Large Deep 8h I x _ U O~ L~ °Zt01~ ~h-~ZO I°~ ~~'~v I I Llquldaarbar sryrac{~ua FAC Mes?c awatbum a VW 0 I- rli ,r,1 La N w ~ ~ 10' Shallow Yes ~ Nyssa tylvarica FACW Maio • 4.6 H H H H Sun loge tree is High ~ Y ~ , . _ O OO ~iv~ W W ~.v~ cr Zopop oppp black gum Hydtic ~ w ~ • ,x ~Mx,;... x O.. OrdNN ~~NN - Sun a tra 7x30' Shallow No Taw N M ' 1.4 H M Lang IQ Plaranusanrfolur PACW arc O d ' London lane-ba i< r Mesic • 4fi M M M M Sun Large tra 7x80' 5hatlow Ya Mtd Plateaus acridtnralis FACW w ~ + . , ^ ~ ro H dnc 2•,: eS , .nc.f Po alas delrotdes FAC Xetic • 4.6 H H H L Sun tm with TS- 5he8ow Ya Hi r .~5}" ~ ,°y ~L o eastern cottonwood Mesic spreading 100' D p i .ate + a~n °~~'~D LY J branches FAC Mesic 2.4 H H H H Sun Dense shade 3040' Shallow No Low 0 E 4 Pyres caJi<r}nAa nee to da 0 Quer:us bicold FACW Mesic to 4-6 H H H Sun to partial Large tree 75• Shallow Yes Hugh a white oak wet Maio San 100 tree 30.75' Shallow Yes Qaerew coccinea FAC Mesic 12 H M M M Sus Large High , scarletoak to rrw ~ FAC Mesic to 2.4 H H H M Sun Large 75• Taproot No High ~ . bur oat wet Mealc spreading tee 100' Qrercas pabarria FACW Mesic• 4.6 H H H M Sun IMF tree 60.60' Shallow Yes High v Pain oak Hydric to deep ~ a J ~ ~ Quer s phellar FACW Mesic to 4.6 H - H Sun Large tree 55.75' Shallow Yes High willow oak wet Mesic I . . I --j m,s rubra PAC Mesic 2.4 M H M M Sun to partial Large 60 W Deep Yes High 0 0 not tree Table 4.5 RECOMMENDED PLANT SPECIES FOR USE IN BIORETENTION HERBACEOUS GROUND COVER Specks ~ W Im 7 Moisture Regime 1 7 Tolerance Motphtolou General BIOR A Characteristics Scie d Namr Indicator Habitat Ponding Salt Oil/ Metals Insects Exposure Form Height Root Native Wildlife a W ~ ~ Common Name Stams Grew S Agrosrisalba PAC Mesic- 1.2 H H H Shade Grass 2.3' Fibaau Yes High MA-M Xeric Shallow C Andropogan gerardl FAC Dry Mesic 1.2 Sun Gn m 2.3' Fiberous Yes High bl • Mesic Shallow Descbanw1a caespaosa FACW Maw to 24 H H H Sun Grass 2.3' Fberous Yes med. totted hairxrass wet Mesic Shallow o J ° v Hedera Hells FACU Mesic 1-2 H San Evergraund Fiberoas No Low Floglish, 1 cover Shallow Low Cornkalatus FAC Mesic • 1.2 H L H H Sun Gass 2-3' Fibetoos Yes High H- Z ~ cs birdsfoot•trefoil Xeric Shallow Pachysandraremunalu FACU Mesic 1-2 M Shade Evergreen Fiberota No Low Japanese sandria around cover Shallow Pankum veretum FAC to Mesic 24 H - H Sun or. Shade Grass 4.5' Fiberoaa Yes High switch grass FACU Shallow Parrhenocisrus FACU Mesic 1.2 - H Shade Evergreen - Fibemus No LAW 1~ ~ z Triaupida gromdCover Shallow ~i Boston I Wnca major FACU Mesic 1.2 H Shade Evergreen - Fiberous No Low ~ O lante winkle weer . Shallow Vbnca mbeor FACU Maic 1.2 H Shade Evergreen Fiberoas No Low common winkle oova Shallow o Z 0 OVERALI =RACE AREA MAP O° ui SCALI SCALE: 1"=200' SHEET: D8 OF D20 File No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/030016MP2 XREF: DRAINAGE PLAN STATE/03001BASE N ~ H ~ U U BIORETENTION SIZING COMPUTATIONS U = z DRAINAGE AREA A * C-FACTOR * 5% (WITH SAND BED) U - YARD INLET THROAT = 746.50 =SIZE OF BIORETENTION AREA Y FOR EMERGENCY OVERFLOW . a W 1.37 AC * 0.85 * 0.05 = 0.058 AC. = 2,536 SF n. ~ Q a W `Y ~ U o y y D y z o N y N y - y ~ ~ / y y Z y BIORETENTION PLANTING COVER COMPUTATIONS Z BIORETENTION AREA #1 = 2,536 SF = 0.058 AC. $ 4 WIDE OPENING PLANTING REQUIREMENT = 1 000 PLANTINGS AC, 5 4y ~ / IN CURB (TYP.) y y TOTAL PLANTINGS REQUIRED = 58 PLANTINGS y TOTAL PLANTINGS PROVIDED = 58 SHRUBS /TREES ~Uso y MN 0 ~ r O y '1' M \00 y l' U h tr ~ ~ ,y Y y ~ ~ y ~ ~0 y y O y y y y y 3" OF 12 MONTHS AGED MULCH ~ p a oQv° y i / 6 PONDED P Z u. y J I~ WATER DEPTH PROP. CURB y w 0 y - - _ ~ p~nz y = TOP EL.=747.80 - I I - ~ ~ w ~ 49. - 1 1 = ~ {--r i d 2y ~ I_II F BOTTOM EL.=747.30 ' ~T_I-II _ ' I___ 3:1 SLOPE ® a'' w Q z ~a y y I I-i ~ . - _ ~ I 0 ~-1 ~ ~ ~ N a--~-a p C~ oc y y - ~ r r: _ - _ ..4 MIN.--_~_.__-_ 1= P-+-d _ z a y y y r i I-1 rIII ~ _--PLANTING SOIL--~• -.'III{ W W _ _ _ ! ~ W f ^ M y _II I III. F a~n i? Q n s~ ICI .;;,w,;.; - , - , - ' 1I1= 6" 1 4" PEA GRAVEL N v = - ;,':~r°";3,'-1 MIN. SAND BED`<~'';':'~:.;, y (USE ASTM C-33 - .A..,~°;:;,,'~ .r,,,tw,. I .-r p-.,._.4 y y CONC. SAND - - - Q ~ ~ ~ ~ w 47.80 y y o °o°o°o°o°o°o Q y 0 0 0 0 0 0 O N B -747.30 y y ~ y w ~ ~ n 4•g y50 14.0 AVG. 6 PERFORATED y y #57 STONE PVC PIPE (SEE PLAN uiunuui°ru~n~ y y y 28.0 AVG. VIEW FOR INVERTS) % ~~`~at ryr~~~~i y y y y y y y SECTION A-A ~J~~ eoe00 ~ ~~~ii 0000 444 y y `I' y v0 ~1 °e~ D00 ~ °o In y y y y N.T.S. ~ ey n ~Z°7°_ y y 'y y y y y e - e0u N 0 y y y y y y°o ° o°~ Y ~d. 0 4/: y y y y y Q o p0e0 ~ ~o y y 6" PONDED y ~ y y WATER DEPTH 3" OF 12 MONTHS AGED MULCH y y W.) y I ~~~h! M~t~~` nrnnuwiumtt y y y l l-- y y y ~ TOP EL,=747.80 - I„I1=1~ y y y y 0 _I - II- y y `1' , ~I I f_ _ _ _ - _ _ I L ,y ,y y y y BOTTOM EL.=747.30 {I~fI _ _ _''I- 3:1 SLOPE SCALE: 1 "=500' c y y y y - - ~ - - - -III { - ':4 MIN.--::~::-_-_' -llk y y y y ~ ~ I PL_ANTIN_G SOIL- • _ y y 'Y ~-I i _ _ _ • I~ I I _II i, _ _ III r.'y. ~ p. • •"H SMI~j I' 6" 1/4" PEA GRAVEL i:~ti:.~h:1 MIN. SAND BED' ~ { '>,.,,;.;:.,n;,. ;M,~,,: ,.`.•,w,•." MIN. 9 89.0' 6" PERFORATED PVC PIPE #57 STONE z 0 SECTION B-B r= n. SCALE: 1 "=10' N.T.S. c°~3 w ° BIORETENTION FILTER DRAINAGE SYSTEM CONFIGURAl10N SCALE: AS SHOWN 0 z I y Q y y y y y y y y YAR INLET THROAT = 762 Fri ERGENCY OVERFLOW `Y y y ~ BIORETENTION SIZING COMPUTATIONS BIORETENTION SIZING COMPUTATIONS Q M 00 0 y y y ~ s ° y y y DRAINAGE AREA A * C-FACTOR * 5% (WITH SAND BED) y y y y A ~ C-FACTOR ~ 5% WITH SAND BED N o DRAINAGE AREA ( ) U } ~M =SIZE OF BIORETENTION AREA y =SIZE OF BIORETENTION AREA Z ~ ~ No ~ N y y y y ~ ~ 0. 5 = 0.045 AC. = 1 962 SF - W ~ X ~ ~ ~ X 1.06 AC 0.85 0 a y y 0.85 AC * 0.85 * 0.05 = 0.036 AC. = 1,574 SF y y ' ~~zw ~ Z~wo ~ W ~`'z00ao ~ ~<cor7 y ~d _~u, ~i a4,oo~ Z oco~n U W V, ZJNh y y y az ~ ~ oo i ~ 00000 U_ NN y y W `Y V7 WO~thO ~ ~W~WOMOOMO y ~ ~~MM ~ V O>MM ~Qhh 3 NWOM y y y y BIORETENTION PLANTING COVER COMPUTATIONS ~ ww y = y y y BIORETENTION PLANTING COVER COMPUTAl10NS y y y 4' WIDE OPENING BIORETENTION AREA #3 = 2,038 SF = 0.047 AC. y y y 6 IN URB (TYP.) BIORETENTION AREA #2 = 1,574 SF = 0.036 AC. y y PLANTING REQUIREMENT = 1,000 PLANTINGS/AC. y y y CENTERED PLANTING REQUIREMENT = 1,000 PLANTINGS/AC. y ON NT STRIPE TOTAL PLANTINGS REQUIRED = 36 PLANTINGS ~V y ~Y y y TOTAL PLANTINGS REQUIRED = 47 PLANTINGS y W y y TOTAL PLANTINGS PROVIDED = 47 SHRUBS /TREES y y TOTAL PLANTINGS PROVIDED = 36 SHRUBS /TREES y O O W `I' y y y y O ~ O WW M y F-M a w y y y ~ Nd~• U1~ .Z ~ ~ Z y y Q I7 ~ S ~ O ~ O y y y y ~ „ 3 OF 12 MONTHS AGED MULCH _ ~ U ~ _ y y y y 3" OF 12 MONTHS AGED MULCH y y y 6 PONDED d 4 WIDE OPENING 6 PONDED U Z~ w ~ X 6 IN CURB (TYP.) WATER DEPTH /PROP. CURB ~ w Q a ~ Q y o y WATER DEPTH PROP, CURB O / cn ~ LL. J uj ~ y y ~J~cO C7 JOO y y y f o - TOP EL.=767.50 U = ~ ~ m Z=°~ ~ y TOP EL=762,60 _ y ® y y - - = II(I~ - ( I V ~p~ i ~ Jaoao - - ' I I - - - - - _ _ - _ - Q o I- h Q i-- W y ~ y BOTTOM EL.-767.00 ~ _ - _ = _ - _ - - ~ ~I I 3:1 SLOPE k' z ~ ~ ~ ~ Q C-i N N ,y y y y - ~I I - _ _ _ _ _ _ _ = I I, W BOTTOM EL,-762.10 I I_L , r~ - _ ~ _ ~ I I-' 3:1 SLOPE -,i - ~Q~N ~'-~NN y y a. y y -III " ~ _ =,,II_T y (r o y ~.~_:4 MIN.'-,~::-_.__'. 11~ PLANTING SOIL ' o ,~~I ~~-:_-PLANTING SOIL- i~I II~I~ y y V y -III- _ _ _ - 14 y y ® y 6 i-III -,'II_~{ I ~ ,try": ~ w r ~ ~ . r 4r„ } vry! ~ 1~ „ N u =1 ,•r., 6 1/4 PEA GRA EL y y o ~ y y ' I ICI ' _ ~ ; ~ - _ ~ 11 1~ Q ~_'^r3'{Y.1~ 111\1 [~A All1 I']CI~:.:iP~:"'.:' Q ; 1 MIN. SAND BED 4,'''" y USE ASTM C-33 ,,,4,~ I • ~ 1 Z ~ - =III , , . . ; , • • •.r.,;~•,tm°: I ~r-6 1/4 PEA GRAVEL 4 W \ (USE ASTM C-36 r,~;:I muv On{vu DCU,!; i _ JAIVU YARD INLET THROAT = 768.00 1w4u W y Q~ SAND) CONC. W W O W 0 o0 o°°°° 0 0 0 0 0 0 W y FOR EMERGENCY OVERFLOW ° 0 0 0° o° o° 0° o°' o N J 0 0 00 O N 0 0 0-0-0-0- 4 R y W ,~G O W 18.0' 6" PERFORATED z Lu W 6.0' " W W a ~ W 6 PERFORATED #57 STONE PVC PIPE (SEE PLAN y ; o y #57 STONE PVC PIPE (SEE PLAN co 31.0 VIEW FOR INVERTS) BIORETENTION #2 15.0 AVG. VIEW FOR INVERTS y W TOP=762.60 TTOP=767.5 SECTION E-E OM=7 .00 W y W W W BOTTOM-762.10 SECTION C -C N.T.S. 4c =J W \ W o. W N.T.S. W W ; y W W W ~10 W W W W W 6" PONDED y W y 6" PONDED 6 WATER DEPTH 3 OF 12 MONTHS AGED MULCH CL > J y W W ` WATER DEPTH 3" OF 12 MONTHS AGED MULCH y W W y y W _ ,y y -II III +I W TOP EL.=767.50 -III - 6 P EL.=762.60 _ I- I IT-1 I TO W W III-{ I L ~ - I I-I I I_I W W X - UJ B OTTOM EL.-767.00 3:1 SLOPE Z y _I II - - _ _ = III BOTTOM EL.-762.10 3:1 SLOPE II-I_LI - - - - - - Z W W = =(II~II .4' MIN. 1=1I PLANTING SOIL_-.. W W W I I-I _ : r I I-I 11- PLANTING _7 7. X11=1 - I LL. y y _Iirl. _ _ - - - - - III_Ii ~ " 6 1/4 PEA GRAVEL 6 1/4" PEA GRAVEL MIN SAND BED`,r'W ' _I •;;;1 . ,y,;n,oyw;a 'lflyl'i.l.' +•\'I C1~.'1iA.MIN. 9" MIN. SAND BED, y y .t. MIN. 9" W y W - I y W \ W W y W W 66.0' 6" PERFORATED ui FJ 115.0' 6" PERFORATED #57 STONE PVC PIPE IN= y W W PVC PIPE W #57 STONE m SECTION F-F uJ o Z Y Y SECTION D-D N.T.S. W W W W W W W W N.T.J. W W W W J BIORETENT ION FILTER DRAINAGE SYSTEM CONFIGUM110N BIORETENTION #3 BIORETENTION FILTER DRAINAGE SYSTEM CONFIGURATION SCALE: AS SHOWN SCALE: 1"=10' W BIORETENTION #2 SCALE: AS SHOWN SCALE: 1"=10' SHEET: D9 OF D20 File No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001BMP2 XREF: DRAINAGE PLAN STATE/03001BASE N ~ ~ 0 U, U BIORETENTION SIZING COMPUTA110NS = Z U - * - OR * 5% WITH SAND BED ~ DRAINAGE AREA A C FACT ( ) Y =SIZE OF BIORETENTION AREA a W 1.16 AC*0.85*0.05=0.049 AC.=2,148 SF a ~ U o ~ ~ ~--i ~ co ~ ~ u N P---F~ N TING COYER COMPUTATIONS o-~ r• BIORETENTION PLAN v~ g y W _ _ . 49 AC. Z B10RETENTION AREA #4 2,148 SF 0 0 W W W - AC. ~ PLANTING REQUIREMENT - 1,000 PLANTINGS/ W 'i' y J~ W TOTAL PLANTINGS REQUIRED = 49 PLANTINGS a 5 ~Y W TOTAL PLANTINGS PROVIDED = 49 SHRUBS /TREES Is-~ p_ 0 ~b Mo y, W W W ?`'`o ¦ N 5 W 9 0 ~ ~ o~ I ~ 5 7- W W W ~ ~ rr n W „ ~ a ® W 3 OF 12 MONTHS AGED MULCH o 6 PONDED tl. ~ W /(u W 4 ~ WATER DEPTH PROP. CURB W 4 WIDE OPENING f W W 7 IN CURB (TYP.) W _ EL.=770.10 ~ u' _ - TOP I I D ~ Z W BOTTOM EL.=769.60 11=1 I I , - _ _ ~ _ ~ _ ~ - ~ T ~ - 1- 3:1 SLOPE W Q y, ~ W - - - _ - _ - - - III Z ~ 71N - - - W V y y ~ "___-_:4 MIN.:-,~~_-_-~ - ~ N 11.1 ~ - _ 1- 0 z W W O - PLANTING SOIL'- ~ - _ ~ Q f I - - - _ _ - .I I~71 w n. W _III - III- ~ _III ~ n 8 W W W O W ilk _ ~','~':~1~:=~~,-. ~r 4» PEA GRAVEL 0 ~ W W C_33 = ~:~;:,.~1 MIN; SAND BED~s,;;.~~'' I SCALE: 1 =500 ~ (USE ASTM '.,"W~~.~'. :,,:h.... N y ~V W BIORETENTION ~4 4 W CONC. SAND) _ - - a y TOP=770.10 o °o°o°o°o°o°o o N ~ a W a W BOTTOM=769.60 0 0 0 0 0 0 y y W » 18 6 PERFORATED W W 57 STONE PVC PIPE (SEE PLAN W y, W 29.0 AVG. VIEW FOR INVERTS) 111111111Illllllllly W W ~J~~ a°oo° ~ W W SEC110N G-G ~ W N.T.S. 3 ~v o° th °e ~ e i ~ ee W W y s ~°y :D - U ;N ono N _e ~ ~Y W - a au~ ~ W W W W 6 PONDED MONTHS AGED MULCH WATER DEPTH J y y W unnnalnu~"`~a~ W W x7 y W y TOP EL.=770.10 1 ~ J, `Y W _ II- _ ~ BOTTOM EL=769.60 - I I=~' - _ _ - _ _ _ - _ _ _ - 3:1 SLOPE o W y W W W W W -111 _ = - W W W W y W W =11 Ilk _ - - -.;4 MIN._-::__-=--.111 W 'Y W W W 'Y y' y y W `Y ~Y J' ~Y ~Y `Y ,1~=f TING SOIL-='•~ =III - PLAN • - . _ : - ~ _ : TI J' W W ~Y W 'Y III-i : . _ I i_L - _ = f' W y y y .y y J W ~ _ _ _ - _ ~I' 4„ PEA GRAVEL W W `Y AND 9E0~~~;` ~ 1 MIN. S .w.' » 4 .fi.oy~.h'•V '"1n ~l•' 9y MIN. 9 YARD INLET THROAT = 770.30 FOR EMERGENCY OVERFLOW i 6" PERFORATED 70.0 PVC PIPE #57 STONE SEC110N H-H N.T.S. a N AGE SYSTEM CONFIGURATION o BIORETENTION FILTER DRAIN SCALE: 1 "=10' SCALE: AS SHOWN 0 z ONS Q BIORETENTION SIZING COMPUTATI a BIORETENTION SIZING COMPUTATIONS Q s N * -ACTOR * 5% WITH SAND BED N o DRAINAGE AREA A C F ( ) DRAINAGE AREA A * C-FACTOR * 5% (WITH SAND BED) Z w ~M =SIZE OF BIORETENTION AREA ~ ~ ~N =SIZE OF BIORETENTION AREA k w~ x ~ x * = 0.51 AC ~ 0.85 * 0.05 = 0.022 AC. = 944 SF -j o 3 ~ Z Z W o ~ AC * 0.85 0.05 = 0.019 AC. 833 SF ~ z W ~ o 0.45 zooms a ~a~r~ W ~ ~ ~ U w a~~~ Z ~°N~ az I i oo I ~ Qo000 U U .MM Vl ~o<nc~ ~ =~a0a~ ~ ~F-MM V OZMM I COMPUTATIONS ,n a"^ 3 ~ W° M BIORETENTION PANTING COVER ^Ww N ^ow BIORETENTION PLANTING COVER COMPUTATIONS BIORETENTION AREA #6 = 944 SF = 0.022 AC. BIORETENTION AREA #5 = 833 SF = 0.019 AC. MENT = 1 000 PLANTINGS AC. PLANTING REQUIRE / PLANTING REQUIREMENT = 1,000 PLANTINGS/AC. - PLANTINGS TOTAL PLANTINGS REQUIRED - 22 YARD INLET THROAT = 76230 TOTAL PLANTINGS REQUIRED = 19 PLANTINGS PROVIDED = 22 SHRUBS TREES TOTAL PLANTINGS / W FOR EMERGENCY OVERFLOW W y E TOTAL PLANTINGS PROVIDED = 19 SHRUBS /TREES W o ° W W y TOP=76.10 ~ M mod' ~M W W W BOTTO -761.60 ~Y ~Y W ~Y ~Y N~' a ~d~' W W c~c ` Q Q y W y y y 4' WIDE ENING W W W W `Y ~V W ~V W ~Y W W W IN CUR ( " LCH H _ ~ V ~ _ „ » 3 OF 12 MONTHS AGED MU z - w ~ 3 OF 12 MONTHS AGED MULCH 6 PONDED W W y W W y W W 0 BE CENTER D DED URB ~ ~ a ¢ ~ ~ 6 PON WATER DEPTH PROP. C PROP. CURB N ~ J o W W W W W y W 0 VEMENT STRi E W - W J' W y' W W W y W WATER DEPTH f = o ~ o~ o f V ~=o,_°~ m z=~~ W W `Y W W ~Y `Y W - _ TOP EL.=761.60 ~ I - _ p~ ~ z o ~ ~ ~ ~ o TOP EL.-762.10 _ 1=1 _ ~ v ~ o r Q ~ ~ ~ y W y y W y y I Q o~rr,~ ~ ~ Nw,n~n = I=1_ = - ~II~_~ - = =111= : u z - - l--I I ~ ~ BOTTOM EL.=761.10 - _ _ _ _ _ - - - I 3:1 SLOPE z ~ ~ Q N N _ - <-{l. ICI - - - - - - W~.~ W W W W W W W W W W 4' WID OPENING ~ W W W W W TOP= 61 BOTTOM EL.-761.60 - - _ - - = - = I- :1 SLOPE _ - . - . _ - o W o I~III - _ . 3 .1 - . _ -III_ ~ o~ oo°~'~ - 1=! - - III _ _ - ~ _ - =•~I=L ~ ~a~~ o~NN W IN CUB (TYP.) W J~ ^ I - - III - - ~d o Nmw =11 = - - ,1=1, !:4 MIN'-____:',__ IG W L TO BE CENTERED BOTT 1.10 W W W y y y W ON PA MENT STRI E 6 .II-I ' = - - - = 1= _,.PLANTING SOILS _ 1 - - -PLANTING SOIL'-___-,' ~~II = _ _ \ W y W W ~ - - _ - - _ = 1 ~ -1111;-_- - _ III=1 = ~ = III ~ Hil .a W W W 62 W W W W ~ y W ~Y ~Y ~Y W `Y ~-11 .-_----'11=1 iii. = II1- - - _ ~ , , ,:•:,,,~.m;; ' 6" 1 4» PEA GRAVEL If=1 . U,• ~~~,~;r~;'~ 6 1/4 PEA GRAVEL - SAND BED. °~>'II~ W ~Y W W /1 A y W W W W y' W W :II-' C-33 ;;;;;~K;'.-1 MIN. - °•;~r,:, • , (USE ASTM - n~„~~~., • :1 MIN. SAND BED;;:,;:'"`~~' FUSE ASTM C-33 ~..:-,.~.r.,_'.:.....w,~:;.•. I i - W W W y ` j`-"~~w.wd.V- I,VIVV JAIYU~ CONC. SAND) - W W W W ® „ F Al DC W W W y 0 0 0 0 0 0 W W W W °0 0000000000 x o 0°0°°°°°o°o° o cv 000000o o o N W W W W y y W W ;r 0 5.0 6 PERFORATED y y W W ® .5 57 STONE 6.0 6PVC PIPE (SEE PERFORATED PLAN z LLI 0 PVC PIPE SEE PLAN # 57 STONE, ( 10.0 AVG VIEW FOR INVERTS) 15.0 AVG. VIEW FOR INVERTS _ W W W '!W W W W W . W y W W W W W W W W ~ W W W SECTION K-K SECTION I-I W W y W W W W 1 --k W W W W W W W W W W W N.T.S. 44 j LIJ N.T.S. W W W W W W W W W W W W W W y y y W W W W W W W W W W W W W W 6 PONDED 12 MONTHS AGED MULCH J 6 PONDED 3 OF 12 MONTHS AGED MULCH WATER DEPTH 3 OF WATER DEPTH TOP EL.=761.60 - TOP EL.=762.10 - - - 11 1 1.1 I -II<TIP T YARD INLET THROAT = 761.80 FOR EMERGENCY OVERFLOW I-LLIF-I 11- ui XBOTTOM EL.=761.10 31 SL BOTTOM EL.=761 60 3:1 SLOPE - - _ - - _ - _ - _ = .I _MIN. I-- _ - 4 MIN.:- - T~ _ {IH _..._.,PLANTING SOIL- - PLANTING S01L » 6 1/4 PEA GRAVEL ~ 6 1/4" PEA GRAVEL ~k MIN. SAND BED -111, "'.~.~~~~i 1.1 1 ,,r•r,tf na r „ MIN MIN. SAND BED; BIORETENTION #5 + #6 SCALE: 1"=10' n-n t:.. v IN. 9 6" PERFORATED „ 60.0 83.0' 6 PERFORATED PVC PIPE PVC PIPE In= #57 STONE SECTION J-J #57 STONE SECTION L_L LU o Z N.T.S. u N.T.S. J BIORETENTION FILTER DRAINAGE SYSTEM CONFIGURATION 0 z BIORETENTION FILTER DRAINAGE SYSTEM CONFIGURATION SCALE: AS SHOWN SCALE: AS SHOWN W 2 SHEET: D10DF D20 Fife No. NC Tax Ma Cadd Dwg. File: DRAINAGE/03001BMP2 XREF: DRAINAGE PLAN STATE/03001BASE P No. Job No. 03-001 i YARD INLET THROAT = 752.80 N ~ f' 0 FOR~MERGENCY OVERFLOW U U U ~ P = z U - 1 ~ i / ~ ( / / mss' ~ ~ ~ / l J ~ ~ 1 l~,~ ~ ~ Y ~ \ ¢ w Q ~ ~ ~ ~ ~ ~ ~ o ~ 'UA _ a ~ ~5, .e \ sr ' / ~ W Z 1 a ° Z 7~ :NING 53! Z OC FRED ~---fl a. / I ~ \ OWN PATEN RT S~iRIPE hp ~..,o VT STRIPE p~ 2 0 TOP=752.60 ® 9 ¦ ~ U s BOTTOM=152.10 Q~ ~ ~ M Ih N Q 0 ' ~ a0 (tea I N ~ G~ V j~ ~ r ~ ~ N ~ ~ C7 a O o I / / ~ 1 4 WIDE ENING P \ D ~ ~ IN CURB TYP.) CSC` ~ ~ ~ ss4 Q~ W ' ~ !L D 0 N Z 0 TOP=754.80 v f ~ / ~ l I I ~~o \ ~ I \ ~ ~V1 5 BOTTOM=754.30 Q ~D N 0' SCALE: 1 "=500' f~ 8 ~ o A ~ N ii o ~ _ Q a G 1 ,~0 P N pQ` \ ~ X66, ~ ~ ~ \ \ ~ 59~- . ' . • 8Q BoTTOM~7 ~~P~ ",~~glUlllalinq~fl~/~// y ( J ~ Z y P ° "°w ~ \ ~ , ~ I , 59 6 1 l ~ 1 y v ° e° °S 0 p °e J. e ° 1 ~ \I TOP= 70 =Va ~ N-°~= / J ~ 6~ BOTT011~,"t~58.20 °W N ° y y ~ o°v~ O o h s / 1 y e° ° 4 WI OPENING y ,•°t~~' IN CUR TYP. ~ o``° ~ TO BE CE RED y naaa J , 'I$ \ ~ 1 ~9~ Biat~naa s~ ~ ON PAVEME STRI~`~ y y y y ~ \ \ \ ~ oleo ai°=is°o.io ~ / - _ ~ ~ y y y y D y y \ y y y W y W y / \ \ \ sZ~ -CO YARD 1 THROAT 780.80 ~ ~ FOR ER(~NCY y y .Y \ y W \ y, y y ~ y y y \ y y y \ y y y / / Y ~Y .AO J' y 0 p y . •Y y y y y W / ~ 1 \ ~O TOP=762.50 ~ \ ~ ~ \ eorra~=~s2oo .E,9 ~ rra X •Y W •Y y d' `Y G y W y / c$P y y W y y y Z G W W F y y / / ~ / ~ 86 . 4~ MI~9E EKING \ ~ 65~ ~ \ \ 6~ \ / ~ ~ ~ IN CUR TYP.1_ W~g~ y y a 'i' y ~ W ~Y y y (U y y y y ~ 0 OWN PA ~ TES7RIPE 64 N WRB j\71?.)G W `V W W W y .Y y y y W 'Y W y y Q y y y y y Z -788- ~ ~ ~ \ y, W W y y y y YARD INLET THR = 759.80 y y' y FOR EMERGENCY RFLOW y y W X y y y yTOPc759.60 •Y W y y y BOTTOM=759.1 g .Y y y y U r ~Y 4' W y y y O _ •Y y •Y y y y y y Q M .Y `Y ~Y OO O y y W W y ~ O^ N o W W `b y y y U r ~ M y y y Z H W ~O y .Y y .V W V W N N O ~ y y ~V ~Y y ~ W~ X Z W x ,T~ ¢ y y y y ~ 7~ Z W ~ W D J y y Z pp z ~¢tOM ~ > ~ W cp tD V ¢W O(D lf) ~ ~ \ ~ y y y W ZUlntn 3~N1~ / ~ ~ ~0 B~ ~na~--'~ zoo 1 ~ \ \ y ¢Z I I ~ pU i 1 y y ~ ~¢OOOJ V U „MM y y W VI WU~C^O ~ Z~w 0000 y y y Z ~QI`~I`~ ~~I~ NW~M \ J ~W~~ vJ ~~w y \ ~ \ 1 V O ~ ° ~ 4~ NODE0p EKING G \ \ ~ ~ \ \ \ ~ M ~ O / IN CURB (TYP.) ~Z ~ ~ TO BE CENTERED 71~ BOITOM9769.20 ~ ' \ ~ ~ \ \ SC L Q ~ ~ N~ ON PAVEMENT STRIPE \ :a ~ oZ ~ ~ o~ \ ~ U „ x Y~ x I \ I I ~ 3 OF 12 MONTHS AGED MULCH 6 PONDED N ~ ~ ~ J R DEPTH PROP. CURB = J ~ ~ Z ~ o c°o BIORETENTION SIZING COMPUTAl1ONS WATE U = s ~ o / ~a~ez ~ / \ 1 ~ ~s J F'~Zpl I ~I I \ _ U hn Q HWaooD DRAINAGE AREA A ~ C-FACTOR ~ 5% (WITH SAND BED) - - TOP EL.-759.60 _ I ~ z ~ M M ~ ~ v> - ~ ~ -i =SIZE OF BIORETENTION AREA _ a i i_i! _ _ _ _ _ _ _ _ _ _ _ ~ o ~ ~ W o^^ ~ BOTTOM EL.-159.10 I ~ L_I i = _ _ _ _ _ _ _ _ ~ I_ 3:1 SLOPE p„ o a ~ ~ g o ~ ~ 6' 0.73 AC ~ 0.85 ~ 0.05 = 0.031 AC. - 1,351 SF = _ -_-,__,;I=, ~=1) ~-_-~?LANTING SOIL-_~__,: _1 - - - - - - - - 6 1/4- PEA GRAVEL - MIN. SAND BED „ ASTM C-33 'A. I (USE CONC. SAND - A ooo000000 o iv \ BIORETEN11ON PLANTING COVER COMPUTATIONS ° 0o0°0°0 0 0 BIORETENTION AREA #8 = 1,541 SF = 0.035 AC. 6.0' 6" PERFORATED 0 (ID PLANTING REQUIREMENT = 1,000 PLANTINGS/AC. SEE PLAN z LLI \ 57 STONE PVC PIPE TOTAL PLANTINGS REQUIRED = 35 PLANTINGS # ~ 15.0 AVG. VIEW FOR INVERTS) TOTAL PLANTINGS PROVIDED = 35 SHRUBS / TREES SEC110N 0-0 W = N.T.S. 6" PONDED " J BIORETENTION #7 SCALE: 1"=20' 3 OF 12 MONTHS AGED MULCH WATER DEPTH _I11= !r 6" PONDED 3" OF 12 MONTHS AGED MULCH 6" PONDED PROP. CURB WATER DEPTH 3" OF 12 MONTHS AGED MULC WATER DEPTH IS AGED MULCH TOP EL. 759.60 _I11=111=x- Lu 4c BIORETENTION SIZING COMPUTATIONS [TOP EL.=VARIES = f TOP EL.=VARIES BOTTOM EL.=759.10 3:1 SLOPE III = _i - - DRAINAGE AREA A C_FACTOR 5% (WITH SAND BED) TOP EL =VARIES _ BOTTOM EL.=VARIES I I _ - = - - - - - _ - = I I- 3:1 SLOPE III=f 1 I` TOP EL.=VARIES M X-1 - E Z' i - SIZE OF BIORETENTION AREA - _ II_i aIf I?~I'_ 7 i_ 7, 7. = 111= BOTTOM EL.=VARIES _ 11=1 _-PLANTING SOIL-:= 1.96 AC 0.85 0.05 0.083 AC. = 3,629 SF =III .:4 MIN.'- - - * = , I i-l • _ _ _ _ • l- I I _ _ _ - _ _ _ _ _ JPLANTING SOIL::-_ 3:1 S 3:1 SLOPE - - - - - - III, 6" 1/4" PEA GRAVEL _If=J:---= - l- ~ 1=1'-= =PLANTING SOIL_ __':If I f I I ~,,,,>.1 MIN. SAND BED,~,,;;;a'. _ 11- -1,:,r~. MIN. 9„ 6" 1/4 PEA GRAVEL ~~I I ---------:II- II. . _ ;,,:,,f:' 6 1 /1 USE ASTM C-33 MIN. SAND BED, I I 6" 1/4" PEA GRAVEL I I ':•;.1 ` ''f""'' - ~:.,~;M•. - - - i~_•,:•',;_;..;,, , MIN BIORETENTION PLANTING COVER COMPUTATIONS CONC. AND MIN. SAND BED o 0c0 0 0 0O0O - _ 112. 0, 6" PERFORATED IN= MIN. 9" m PVC PIPE BIORETENTION AREA #7 = 3,842 SF = 0.088 AC. 0 0 0 0 0 0 o N PLANTING REQUIREMENT = 1,000 PLANTINGS/AC. " TOTAL PLANTINGS REQUIRED = 88 PLANTINGS 5.0' 6" PERFORATED TREES PVC PIPE SEE PLAN 38.0' TOTAL PLANTINGS PROVIDED - 88 SHRUBS / #57 STONE 6 PERFORATED #57 STONE PVC PIPE SECTION P-P W 10.0 AVG. VIEW FOR INVERTS) #57 STONE SECTION N-N (TYP.) rYP.) N.T.S. mi BIORETENTION FILTER DRAINAGE SYSTEM CONFIGURATION SECTION M-M (TYN SCALE: AS SHOWN N.T.S N.T.S. N.T.S. W BIORETENTION FILTER DRAINAGE SYSTEM CONFIGURATION SCALE: AS SHOWN SHEET: D11OF D20 File No. NC Tax Ma Job No. 03-001 Cadd Dw9. File: DRAIN AGE/03001BMP2 XREF: DRAINAGE PLAN STATE/03001BASE P No. ~ ~ H ~ U U U _ ? wg U to .a D W a ¦ U o a ~ p ° z o N ~ N ~ fA °~x~ ~:~~~x~ w - z ~ 5 ~ . Z M s ~ ~ ~ MN 0 ' ~ O a0 f U i, ~i' ~ ~ - ~ s ~ N r~ ~ ~ MAIN OUTFACE ' " N M ~v 0 0 a v • , Z C w o \ ~ o © ~ fA Z r _ , s ~ t Q a ~ c~ W ~p o W Q ~ / 0 ~ N / z a UBAREA 1 ~i- - wa ~ 0 ~ - U o R ~ O P. ? II R / J Q U e « ~ 1`11111111111111111p11/p//// ~l , 1 ( Jf ~~\\~l ~ ~ ~ ~ \ j O V ~°e M e0 ~i ~,e o °o N O o =~e~ J~ o = O oy a c _Uom zo'~_ otJ N ° = o1r O M o° ~ o ee f~0 0 000° ~ ~ ~ B yy~ oo ~ y~y/ ~ p`~`~ ~ yagNUUnn101a1?I~u~1~ i ~ 4 ~ ~a i ii r \ ~ ~ ~l t ~ / Q O a t Y ~L J I~ t R P !il ~'i' ~ Rio iii ~1, ~~i •O 0 o ~ e O F Q tL U W O a ~ i(ii 11 "~1 i `r ~?l ~ i I ix sd O } Z I ~ / ~ V! o / C ; / _ ~ ~ g / r i ! _ ~ 1 \t fly j~ JI MAJOR DRAINAGE DMDE M ~ ~ a ~ o ~ a o N I N ¦ ¦ ¦ ¦ ¦ ¦ SUBAREA DRAINAGE DMDE U / % Z ~ W ~M o ~ ~ N O a j 7uT~3 ~ Z~wo ~ d SHEET FLOW zw ~ ~Q / W ~ ~Z~~ ~i ~~~cMo % U W aw~u~ Z z°N~ ' - I ~ v v ~ p.ZZ I I O~pOI I ~ < ~aooao U VViNN SHALLOW w - Z _ M / ~j w~cpcc ~ J~oOO~ ~ ~ CONCENTRATED FLOW o ~~M a ~ i ~ ~ ~a~~ 3 °w SUBAREA 4 ' ~ i - J'- i ~ 4 ~ CHANNEL FLOW o i 14.50 Ac j / 1. S~ ~ ~ ? ' ~ SUBAREA OUTFACE / o 0 4 / ° r ~ ! d' Z M , , , ~ M O MAIN a . , . WETLANDS TO RE ~ / :Q ~ oZ / ~ ~ .Q a F- O 0" - i U U ~ ~ L-- ~ X Y~ q ~ _ wy+'JO~000 O'~°o~ ~ ,r U =orn m o=~~ ~ ~~~oi i ~~wol i ~ / a ~VJ OF-n~ a a rwaooo w ~ ~ = a~8 ~ 1 I ~ ZZnn ~ O ~L~NN O ~~v~ w w p-`^ ptY OO Q M la.~~ 0 N m~i ?r ~ ~ 111 rl l / r1 A TI 1 ¦ Z SCALE: 1"=150' J 2 uj 0 M (D Cc J ui =J H OUTFALL 153.19 AC. uJ 0 0 PRE-DEVELOPMENT AREA TO OUTf 0 > W J Z 1OFF 50-YEAR RUNOFF 100-YEAR RUNOFF cc UJ 1-YEAR RUNOFF 2-YEAR RUNOFF 10-YEAR RUNOFF H INFLOWS T01 MAIN OUTFALL INFLOWS TO: MAIN OUTFALL INFLOWS TO: MAIN OUTFALL INFLOWS T0: MAIN DUTFALL INFLOWS TO! MAIN DUTFALL Volume Peak Time Peak Flow Volume Peak Time Peak Flow Volume Peak Time Peak Flow Volume Peak Time Peak Flow Volume Peo ume Peak Time Peak Flow a,ft min cfs HYG file HYG ID HYG tag cu, ft min cfs HYG file HYG ID HYG tag cu,ft min cfs HYG file HYG ID HYG tog cu,ft rein cfs HYG file HYG ID HYG tag cu, ft rein cfs HYG file HYG ID HYG tag cu,ft 32933 739, 00 5, 62 PRE, HYG SUBAREA 1 50yr 62265 738, 00 11, 66 PRE, HYG SUBAREA 1 100yr 71514 738, 00 13, 56 YG SUBAREA 1 1YR 5454 750,00 43 PRE.HYG SUBAREA 1 2yr 10486 744.00 1.23 PRE, HYG SUBAREA 1 10yr 32933 i PRE H 4606 890.00 14 PRE, HYG SUBAREA 2 2yr 13971 764, 00 1. 11 PRE. HYG SUBAREA 2 10yr 45477 45477 756.00 5. 24 PRE, HYG SUBAREA 2 50yr 87184 755. 00 11,25 PRE, HYG SUBAREA 2 100yr 100399 755, 00 13. 16 PRE, HYG SUBAREA 10 lYR PRE, HYG SUBAREA 11 1Y R 5803 905.00 17 PRE, HYG SUBAREA 3 2yr 14960 796.00 .91 PRE, HYG SUBAREA 3 10yr 48696 i 48696 783, 00 4, 08 PRE. HYG SUBAREA 3 50yr 93355 783, 00 8.65 PRE, HYG SUBAREA 3 100yr 107505 783, 00 10, 11 PRE, HYG SUBAREA 12 lYR 6088 915. 00 18 PRE, HYG SUBAREA 4 2yr 19875 799, 00 1.22 PRE, HYG SUBAREA 4 10yr 62423 >2423 787.00 5, 18 PRE, HYG SUBAREA 4 50yr 118021 787.00 10.69 PRE, HYG SUBAREA 4 100yr 135554 774, 00 12, 45 X X P. 103008 765.00 11.99 1 YR 7049 775. 00 39 PRE. HYG SUBAREA 5 2yr 14334 775. 00 1.04 PRE, HYG SUBAREA 5 10yr 46659 i PRE, HYG SUBAREA 2 16659 766.00 4, 84 PRE, HYG SUBAREA 5 50yr 89449 766, 00 10.27 PRE, HYG SUBAREA 5 100yr lYR 7548 810, 00 35 PRE, HYG SUBAREA 6 2yr 13040 796. 00 , 70 PRE, HYG SUBAREA 6 10yr 45979 PRE, HYG SUBAREA 3 15979 783. 00 3. 59 PRE. HYG SUBAREA 6 50yr 90819 782,00 8.06 PRE. HYG SUBAREA 6 100yr 105171 782, 00 9. 52 ')9821 809. 00 4. 85 PRE. HYG SUBAREA 7 50yr 130265 808. 00 9.76 PRE, HYG SUBAREA 7 100yr 149240 807, 00 11.31 PRE, HYG SUBAREA 4 1YR 10336 800. 00 49 PRE, HYG SUBAREA 7 2yr 22985 809, 00 1. 24 PRE. HYG SUBAREA 7 10yr 69821 £ ')3542 788.30 4. 98 788 36 PRE. HYG SUBAREA 8 100yr 137984 788.00 12, 07 PRE, HYG SUBAREA 5 1YR 7232 785.00 38 PRE, HYG SUBAREA 8 2yr 20231 802,00 i.20 PRE. HYG SUBAREA a 10yr 63543 37370 785,00 2, 90 PRE, HYG SUBAREA 9 50yr 76301 785.00 6.82 PRE, HYG SUBAREA 9 100yr 88897 785, 00 8, 11 6124 820,00 24 PRE. HYG SUBAREA 9 2yr 9646 797,00 46 PRE. HYG SUBAREA 9 10yr 37370 PRE, HYG SUBAREA 6 lYR 11661 806.00 2.57 PRE, HYG SUBAREA 10 50yr 85062 806.00 6.02 PRE,* HYG SUBAREA 10 100yr 99104 806.00 7, 17 0 W PRE, HYG SUBAREA 7 lYR 12285 825,00 ,55 PRE,HYG SUBAREA 10 2yr 10753 835,00 44 PRE, HYG SUBAREA 10 10yr 41661 F 00 50 PRE. HYG SUBAREA 11 2yr 13547 862.00 52 PRE. HYG SUBAREA 11 10yr 52485 £ PRE, HYG SUBAREA 8 lYR 10520 815 52485 822, 00 2, 89 PRE, HYG SUBAREA 11 50yr 107161 822. 00 6.72 PRE, HYG SUBAREA 11 100yr 124852 822. 00 7.99 J 4132 835.00 13 PRE. HYG SUBAREA 12 2yr 12966 903.00 47 PRE. HYG SUBAREA 12 10yr 45724 F PRE, HYG SUBAREA 9 lYR 15724 881.00 2, 11 PRE, HYG SUBAREA 12 50yr 90316 853.00 4.52 PRE, HYG SUBAREA 12 100yr 104589 853.00 5, 33 PRE.HYG MAIN OUTFALL 1YR 87177 815,00 3.34 PRE,HYG MAIN OUTFALL 2yr 176796 796,00 8.74 PRE,HYG MAIN OUTFALL 10yr 592770 PRE,HYG MAIN DUTFALL 50Yr 1150337 774.00 86.80 PRE,HYG MAIN DUTFALL 100yr 1327819 774.00 102, 05 X2770 783,00 40,07 W SHEET: D12 OF D20 File No. NC Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAIN AGE/03001SWMPRE XREF: DRAINAGE PLAN STATE/03001BASE PREDEVELOPMENT TIMES OF CONCENTRATION Tc SUBAREAI Segment #1: Tc: TR -55 Sheet Mannings n .4000 Hydraulic Length 300.00 ft 2yr, 24hr P 3.1200 in Slope .055000 ft/ft Avg.Velocity 14 ft/sec Segment #1 Time: 34. 94 min Segment #2: Tc: TR -55 Shallow Hydraulic Length 620.00 ft Slope . 058000 ft/ft Unpaved Avg. Velocity 3,89 ft/sec Segment #2 Timet 2. 66 min -------------------------------------------------------------- Segment #3: Tc: TR -55 Channel Flow Area 45,0000 sq. f t Wetted Perimeter 22.42 ft Hydraulic Radius 2.01 ft Slope .019000 ft/ft Mannings n .0450 Hydraulic Length 264.00 ft Avg. Velocity 7. 26 f t/sec Segment #3 Time: 61 min Total Tci 38,21 m i n ----------------------- SUBAREA 2 -------------------------------------------------------------- Segment #1: Tc: TR -55 Sheet Mannings n .4000 sq. ft Wetted Perimeter Hydraulic Length 300.00 ft 0. 00 2yr, 24hr P 3.1200 in ft/ft Slope .041000 ft/ft Hydraulic Length Avg. Velocity .13 ft/sec -------------------------------------------------------- 1489.00 Segment #1 Time; 39. 30 min Segment #21 Tc: TR -55 Shallow �s Hydraulic Length 631.00 ft ttttttttttttttitt' Slope .055000 ft/ft \I "' Unpaved CC c Z JNJ J co Avg. Ve t oc i ty 3,78 f t/sec U<v D ---------------- ------ --------- Segment #2- Time, -------------------- 2.78 min Segment #3: Tc: TR -55 Channel Flow Area 20,0000 sq. ft Wetted Perimeter 14.94 ft Hydraulic Radius 1.34 ft Slope .015000 ft/ft z Mannings n .4500 Hydraulic Length 270.00 ft Avg. Velocity .49 ft/sec ------------------------------- Segment- #3 Time,------ 9_14 min -Total-Tci-----51_22-min- 58. 48 m i n SUBAREA 3 -------------------------------------------------------------- Segment #lt Tct TR -55 Sheet Mannings n .4000 Hydraulic Length 300.00 ft 2yr, 24hr P 3.1200 in Slope . 026000 ft/ft Avg, Ve t oc i ty 11 f t/sec Segment #1Time, 47.15 min ------------------------------- - -------------------- Segment #2: Tc: TR -55 Shallow Hydraulic Length 682.00 ft Slope . 050000 ft/ft Unpaved Avg. Velocity 3,61 ft/sec Segment #2 Time315 min ------------------------------- ------- _ Segment #3i Tc, TR -55 Channel Flow Area 5,0000 sq. f t Wetted Perimeter 7.47 ft Hydraulic Radius .67 ft Slope .015000 ft/ft Mannings n .4500 Hydraulic Length 343.00 ft Avg.Velocity 31 ft/sec Segment #3 Time: 18.42 min ------------------------------- -------------------- Total Tci 68.73 m i n File No. i4C Tox Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001SWMPRE SUBAREA 4 Segment #1: Tc: TR -55 Sheet Mannings n .4000 Hydraulic Length 300.00 ft 2yr, 24hr P 3,1200 in Slope 020000 ft/ft Avg. Velocity .10 ft/sec Segment #1 T i me: 52.37 min Segment #2: Tci TR -55 Shallow Hydraulic Length 972.00 ft Slope . 033000 ft/ft Unpaved Avg. Velocity 2,93 ft/sec Segment #2 Time, 5. 53 min -------------------------------------------------------------- Tota t Tci 57,90 m i n SUBAREA 5 -------------------------------------------------------------- Segment #1: Tc: TR -55 Sheet Mannings n .4000 sq. ft Wetted Perimeter Hydraulic Length 300.00 ft 0. 00 2yr, 24hr P 3.1200 in ft/ft Slope . 063000 ft/ft Hydraulic Length Avg. Velocity .15 ft/sec -------------------------------------------------------------- 1489.00 Segment #1 Time: 33. 10 min Segment #21 Tci TR -55 Shallow �s Hydraulic Length 276.00 ft ttttttttttttttitt' Slope .062000 ft/ft \I "' Unpaved CC c Z JNJ J co Avg. Velocity 4,02 ft/sec U<v D -------------------------------------------------------------- Segment #2 Time: 1. 15 min Segment #3t Tc: TR -55 Channel Flow Area 45,0000 sq. ft Wetted Perimeter 22,52 ft Hydraulic Radius 2.00 ft Slope .010000 ft/ft z Mannings n .4500 Hydraulic Length 764.00 ft Avg. Velocity .53 ft/sec ---------------------------------------_- Segment #3Time 24 24 min Total Tct 58. 48 m i n SUBAREA 6 ------- ------------------------------------------------------ Segment #11 Tc: TR -55 Sheet Mannings n .4000 Hydraulic Length 300.00 ft 2yr, 24hr P 3.1200 in Slope 023000 ft/ft Avg. Velocity .10 ft/sec Segment #1 Time: 49 53 min ----------------------------------------_-- Segment #2: Tc: TR -55 Shallow Hydraulic Length 719.00 ft S lope075000 ft/ft Unpaved Avg. Velocity 4,42 ft/sec Segment #2Time271 min ----------------------------------------_- Segment #31 Tc TR -55 Channel Flow Area 20.0000 sq. f t Wetted Perimeter 14.94 ft Hydraulic Radius 1. 34 ft Slope .008500 ft/ft Mannings n .4500 Hydraulic Length 472.00 ft Avg.Vetocity 37 ft/sec Segment #3 T i met 21,22 min Tota t- Tc, -----73_45-min SUBAREA 7 --------------------- Segment #1: Tc: TR -55 Sheet Mannings n 4000 Hydraulic Length 300.00 ft 2yr, 24hr P 3. 1200 in Slope 017000 ft/ft Avg. Velocity .09 f t/sec Segment #1 Time: 5589 min -------------------------------------_ Segment #2i Tc: TR -55 Shallow Hydraulic Length 526.00 ft Slope 068500 ft/ft Unpaved Avg. Velocity 4,22 ft/sec ------------------------------ Segment #3: Tc: TR -55 Channel Flow Area 5.0000 sq. ft Wetted Perimeter 7. 47 ft Hydraulic Radius .67 ft Slope 017500 ft/ft Mannings n .4500 Hydraulic Length 516.00 ft Avg. Velocity 34 ft/sec Segment #3 Time: 25. 66 min - - - -- -- - - - - - - - - - - - - - - -- --- - - -- - - - -- - - - - -- - - - -- - - - ---- - --- -- - - Tota l Tct 83,63 m I n SUBAREA 8 Segment #1: Tc: TR -55 Sheet Mannings n .4000 Hydraulic Length 300.00 ft 2yr, 24hr P 3.1200 in Slope 033000 ft/ft Avg. Velocity .12 f t/sec Segment #1 Time: 42. 87 min -------------------------------------------------------------- Segment #2i Tc: TR -55 Shallow Hydraulic Length 673.00 ft Slope . 043000 ft/ft Unpaved Avg. Ve t oc i ty 3.35 f t/sec Segment #2 Time, 3. 35 min Tota l Tci 46. 22 m i n SUBAREA 9 -------------------------------------------------------------- Segment 41, Tc- TR -55 S!)eet Mannings n 4000 Hydraulic Length 300.00 ft 2yr, 24hr P 3, 1200 in Slope .037000 ft/ft Avg. Velocity .12 ft/sec Segment #1Time 40 ------------------------------- - ------ _ min - Segment #2: Tc: TR -55 Shallow Hydraulic Length 973.00 ft S lope 057000 ft/ft Unpaved Avg. Velocity 3. 85 ft/sec Segment #2 Timet 4 ------------------------------- ------ _ 21min - Segment #3. Tc: TR -55 Channel Flow Area 45.0000 sq. f t Wetted Perimeter 22. 42 ft Hydraulic Radius 2.01 ft Slope . 033000 ft/ft Mannings n .4500 Hydraulic Length 245.00 ft Avg. Velocity .96 ft/sec Segment #3 Timet 4. 27 min Total Tci---- 49_42 -min SUBAREA 10 -------------------------------------------------------------- Segment #1: Tc: TR -55 Sheet Mannings n .4000 Hydraulic Length 300.00 ft 2yr, 24hr P 3. 1200 in Slope 040000 ft/ft Avg. Velocity .13 ft/sec Segment #1 Time 39,69 min Segment #2: Tc: TR -55 Shallow Hydraulic Length 517.00 ft Slope . 066000 ft/ft Unpaved Avg. Velocity 4.15 ft/sec Segment #2 Time, 2. 08 min -------------------------------------------- Segment #3: Tc: TR -55 Channel Flow Area 45.0000 sq. f t Wetted Perimeter 22. 42 ft Hydraulic Radius 2.01 ft Slope 026000 ft/ft Mannings n 4500 Hydraulic Length 1135.00 ft Avg. Ve l oc t ty .85 f t/sec Segment #3 Timet 22. 27 m i n Total Tci 64. 04 m i n ----------------------- SUBAREA 11 -------------------------------------------------------------- Segment #1: Tc: TR -55 Sheet Mannings n .4000 Hydraulic Length 300.00 ft 2yr, 24hr P 3. 1200 in Slope 057000 ft/ft Avg. Velocity .15 ft/sec Segment #1 T i met 34,45 min -------------------------------------------------------------- Segment #21 Tci TR -55 Shallow Hydraulic Length 1002.00 ft Slope 036000 ft/ft Unpaved Avg. Velocity 3.06 ft/sec Segment #2 Time: min -------------------------------------------------------------- Segment #3: Tc: TR -55 Channel Flow Area 45.0000 sq. f t Wetted Perimeter 22,42 ft Hydraulic Radius 2.01 ft Slope 016000 ft/ft Mannings n 4500 Hydraulic Length 629.00 ft Avg. Velocity .67 ft/sec Segment #3 Time: 15. 73 min Total-Tci-----55_63-min SUBAREA 12 -------------------------------------------------------------- Segment #1: Tc: TR -55 Sheet Mannings n .4000 Hydraulic Length 300.00 ft 2yr, 24hr P 3. 1200 in Slope 013000 ft/ft Avg.Velocity 08 ft/sec Segment# 1Time 62 -------------------------------------------------------------- 22 m i n Segment #2: Tci TR -55 Shallow Hydraulic Length 673.00 ft Slope 031000 ft/ft Unpaved Avg, Velocity 2. 84 ft/sec Segment #2 Time, 3. 95 min Tota t Tci 66. 17 m i n PREDEVELOPMENT TRAVEL TIMES Tt TRAVEL TIME 1 Segment #1: Tc: TR -55 Channel Flow Area 0,0000 sq. ft Wetted Perimeter 0. 00 ft Hydraulic Radius 0. 00 ft Slope . 000000 ft/ft Mannings n .0000 ft/ft Hydraulic Length 0. 00 ft Avg. Ve loc i ty .00 ft/sec ------------------------------------------ -Total-Tti----- 0_00 min TRAVELTIME 2 ------------------------------------------ Segment #lt Tci TR -55 Channel Flow Area 45.0000 sq. ft Wetted Perimeter 22.42 ft Hydraulic Radius 2. 01 ft Slope .021000 ft/ft Mannings n .4500 Hydraulic Length 570.00 ft Avg. Velocity 76 ft/sec Total Ttt 12. 44 m i n TRAVEL TIME 3 ------------------------------------------ Segment #1: Tc: TR -55 Channel Flow Area 45. 0000 sq. f t Wetted Perimeter 22.42 ft Hydraulic Radius 2.01 ft Slope . 016000 ft/ft Mannings n .4500 Hydraulic Length 1168.00 ft Avg.Velocity 67 ft/sec ------------------------------------------ -Total Ttt-----29_21-min - TRAVEL TIME 4 Segment #lt Tc: TR -55 Channel Flow Area 45.0000 sq, f t Wetted Perimeter 22.42 ft Hydraulic Radius 2. 01 ft Slope .017000 ft/ft Mannings n 4500 Hydraulic Length 1808.00 ft Avg. Ve t oc i ty 69 f t/sec ------------------------------------------ Total Ttt 43,87 min TRAVEL -----------------------------------------TotalTtt43_87min TRAVEL TIME 5 ------------------------------------------- Segment #1: Tc: TR -55 Channet F low Area 45,0000 sq. ft Wetted Perimeter 22.42 ft Hydraulic Radius 2.01 ft Slope . 010000 ft/ft Mannings n .4500 Hydraulic Length 481.00 ft Avg.Velocity 53 ft/sec -Total Tti -----15_22-min - TRAVEL TIME 6 Segment #1: Tc TR -55 Channel Flow Area 45.0000 sq. ft Wetted Perimeter 22.42 ft Hydraulic Radius 2.01 ft Slope .015000 ft/ft Mannings n .4500 Hydraulic Length 1073.00 ft Avg. Velocity .65 ft/sec ------------------------------------------ -Total-Ttt=-===27_71-min- TRAVEL TIME 7 ------------------------------------------ Segment #1: Tc: TR -55 Channel Flow Area 45. 0000 sq. ft Wetted Perimeter 22. 42 ft Hydraulic Radius 2.01 ft Slope 013000 ft/ft Mannings n 4500 Hydraulic Length 1739.00 ft Avg. Ve t oc i ty .60 f t/sec Total Ttt-----48_25-min - TRAVEL TIME 8 ------------------------------------------ Segment #lt Tci TR -55 Channel Flow Area 45.0000 sq. ft Wetted Perimeter 22.42 ft Hydraulic Radius 2.01 ft Slope .014000 ft/ft Mannings n 4500 Hydraulic Length 2366.00 ft Avg. Ve loc 1 ty .62 ft/sec ------------------------------------------ sasssasssssssssasssssssss Tota l Ttt 63,26 M i n 0 TRAVEL TIME 9 Segment #1: Tc: TR -55 Channel Flow Area 45,0000 sq. f t o U Wetted Perimeter 22. 42 ft Hydraulic Radius 2.01 ft Slope 010000 ft/ft Z Mannings n .4500 Hydraulic Length 1489.00 ft a �s Avg. Velocity .53 f t/sec 0 1/4 ` a°aoeeee°°�� 1 U the°o`7i�r o U as zo -3 C4 1 Oh,o° 0►(v�oQ�� W a 5 � a J 0 ttJ � = Z a a �s ttttttttttttttitt' CO CC O�_ 0 U s $2 I 9 \I "' lt CC c Z JNJ J co � W �W U<v D LL J � Lm WZ N z 1/4 ` a°aoeeee°°�� P Ov o° the°o`7i�r as zo -3 C4 1 Oh,o° 0►(v�oQ�� o° 00010- _Total Tti_---_47_10 min co- O TRAVEL TIME 10 a ------------------------------------------ oCn s Segment #1: Ta TR -55 Channel 3 Z W o Flow Area 45. 0000 sq. f t LV �d a z n ° ¢ co "' Wetted Perimeter 22.42 ft Z� � Z �' Z �Q t 10 89 Hydraulic Radius 2.01 ft O Z 2 2 O co Slope 010000 ft/ft Mani n s n .4500 QQ "'r- r 3 N_ "' o HydraulicgLength 2132,00 ft J ^�' cat �ow Avg. Velocity .53 f t/sec ------------------------------------------ 0 C M -Total -Ttt -67_44-min- E5 C>< Q N00 N� CL Oco Z oZ Q � U X Y x Q TRAVEL TIME 11 =� z = CD CD ------------------------------------------ o � o �WORCO Wo oo�-..-� Segment #11 Tc, TR -55 ChannelM � R � C3o m F low Area 45.0000 sq. ft Wetted Perimeter 22.42 ft Hydraulic Radius 2.01 ft Slope .010000 ft/ft Mannings n .4500 Z st_ Hydraulic Length 3114.00 ft W J Avg.Velocity 53 ft/sec2W9= O a ------------------------------------------ t3 a O v __________ .i Q _Total Tti_-__-98_51-min - W ■ W J H- oc W 0 O TRAVEL TIME 12 'j Z cc ------------------------------------------ W44 0% Cc a Uj > = � Segment #1: Tc: TR -55 Channel V he Z Flow Area 45. 0000 sq. f t LL. Wetted Perimeter 22.42 ft O O Hydraulic Radius 2.01 ft 0 Slope .010000 ft/ft V Mannings n .4500 O Hydraulic Length 4647.00 ft x = Avg.Velocity 53 ft/sec W � ------------------------------------------ Z O W _Total Ttt147_00 min- U � W SHEET:D13 OF D20 r V n J a r n o ~v X - ~ ~ ~ ~ ~ ~ U ~ ~ ~ ~ MAJOR DRAINAGE DMDE ~~f` U ~ ~ U Jj , ~ = z MAIN OUTFACE ~ Y 1 - ~ \ U O _ ~'v WETLANDS TO REMAIN MJ' , \ . ..Y ..i ~Y ~..~1 ..~i~ ..~Y..~i y~Y ~ ~ X41 .1. ~ ~ ~ ~ (V ''J` rx 1 ~ ~ ~ Q (n °z ~ ~ Try' C ~n ~ ~ Z ~ Z ~ \ + ~ ~ ~ I + = M k~ + + ~ ~ ~ o - + U m~ ~ III III ~~r ~ / /kx/ + ` ~ ~ / / / ~\o ~ ~ ~ + g a + \ Q o \ ~ + + / ~ / / •..i 0 ~ / \ Z i MAIN OUTFACE J ,r ~ ~ 1T ~ ;;4~, ~ . + , , + , + ~ W 1'' + fA Z W ~ / / + +/+/,f,~ + ~ ~ ~ M ~D + / + + \ ~ Q 4 + + / + + \ 0 ~ ~ N ~r'' , ~ SUBAREA 2 \ e ° ~ ~l _ _ r + , ~ U ~ .~~I~ / ~ - AREA=11.46 A ~ o - y SUBAREA 1A / CN = 98 o + ~ ~ S + 72 x ~ u / ~ ~ a ~ r w i J SEDIM ~ 11~~ ~ ° ` ~ ~ AREA =13.13 Ac ~ i ~ i Q2 = ~.1 C i ~ \ ~J ~ \ / IIIUIIIIIII nk \,y N~ CN = 98 q0- 71.5 C Iii . ~ ~ \ Q2= 52.8 CFS ~ ! ~ : = 1 ' Cep= 81.9 CFS ' J • s ~ ~\a~ ~ ~yri ~ y\ osaoeo°o i~~~ x ss~ V o0 0°0 7 ~ aDo o°°°rN o Qn Zo U ,v? ao e~ ,o e1+1 N"~~ ~y o0 0°~ ° Y. ~ ~ i~~. ~ ~ s f ~ ~ nllmn p o a O I \ J SUBAREA 1C ~ , ~ - ~ ~ ~ / / a I ~ ~ AREA =1.99 Ac ~ ~ ~ ~ ~ ~ ~ ~ ~ b ~1 / ~ ~ ~ i / # I ~ ~ 1• ~ \ ~ ~ d ~ I~ ~ \ ~ ~ o~ ~ ~ Z 0 U W QIO=12.4 CFS , j / r ~ r ~ , ~ t o i . ~ - ~ i I I' ~ ~ SUBAREA 1B ~ ~ 1 ~1, ~ ,`i i~~ ~ ~ = ~ AREA = 24.41 Ac ~ , d ~ z 0 i J N g ~ ~Q ~ ~ ~ ~ I I ~ CN = 98 ~ i ~ ~ l ~ ~ O ~7j 1 / ~ Q ~ O Q O N li; i 1( ~ Q2= 982 CFS ~ e i i; N ^o O V 1 1 Z ~ w - r~ \p o V ~ NO Q ~ W ~ ~ ~ ~ W X Z W Q i ~ , t O~pr 1522 CFS S'~~;' 1 0 ~ 7 ~ WOO ~ ~ '~20Q ~ ZV ~QtOM ~ / Q ~uJ N W 0'tp f0 ~ R / aZ I I ~ ~O I I ` i ~ Qo00J V1 V UVNN a ~ W~~M U OZr'')M ' O ~¢6^i^ '~n NWr7M V Y V a ' ~ ~ / O O ti i ` 1 ,ii\ ' ' _ . / / O O ~ / / 1'7 i ~ 1 ~ ~ / ^M M t O _ N~ Q r j, ~I ~ _Q ° a ' Z~ W~ x Y. a' Y Q ~ ~ vi ~ g - w r ~ ~~~ii11~Or- C~J~O ~~l ~ ~ SUBAREA 3C / ~~t~~ S d ~ 3200 m Z=tpN I ~ O O co ~ ~ ~ ~F-~ZO I~ ~~w I i ~ i~ a ~yV,~ Orman QL Q, ~-9ooao = I~ ZZ^^ r 0 QLa_NN \ ~ ~ o ~,ppp~p. W w opp.~.,p,, AREA - 25.38 Ac tY OQstd ~~Nd' ~ ~ Q M La_~~ D N m`..~ \ . \ ~ ~ 1 CN - 98 i -V'v W Q 02=102.1 CFS 010= 158.3 CFS TO EDW #2 a Lu o ~ - ~ A =11.46 Ac 0 C'3 a W a SUBAREA 1D CN = 98 W J u, x AREA =10.57 Ac Q 1 = 37.9 CFS o =J ~ o CN = 98 SUBAREA 3E Q 2 = 46.1 CFS (1) > j °z A 9g~, , Q2= 42.5 CFS AREA = 4.17 Ac SUBAREA 3D 010- 71.5 CFS a W U F Q10= 65.9 CFS CN = 98 AREA = 6.45 Ac TO EDW #3 a Q LL. ~ (]2 =16.8 CFS CN = 98 o J v 01()= 26.0 CFS f Y Y' ~ ~'I Q2= 25.9 CFS A = 73.89 Ac F X v ~ o 00.0 ~ !'i_ CN=98 w 010= 40.2 CFS j~ C>> = 244.34 CFS ~ O w - , , - ~?eames R POST-DEVELOPMENT DRAINAGE SCALE: 1"=100' 3Rd. ~ 02= 297.20 CFS co z Y W kGE AND FLOW PATH 010= 460.79 CFS co SHEET: Dl 4 OF D20 File Na NC ,a Map x> Jo, Ne 03-001 <a,a o.s. File: oR.,N.GE,03001SW,POS. mEF DRAINAGE PLAN S a`E,o=00,aa=E ~ N ~ ~ ~ 0 U U U _ - - _ ? ~ s ~ ~ ~ ~ Elevation Outflow Storage Area Inftlt, Q Total 2S/t + ~ ft cfs cu, ft sq. ft cfs cfs cfs Y W a 733, 00 , 00 0 22895 . 00 , 00 ~ 00 - n a 733, 10 , 04 2301 23145 , 00 .04 76, 76 ° ~ U 733, 20 .06 4629 23397 .00 , 06 154.37 O z c 733. 30 , O7 6981 23650 . 00 , 07 232.78 N 733, 40 , 08 9360 23905 , 00 .08 312, 07 N ~ N 733, 50 , 09 11762 24160 , 00 , 09 392, 17 733, 60 , 10 14191 24418 , 00 , 10 473, 12 733, 70 , 11 16646 24676 , 00 , 11 554, 98 W Z Z 733, 80 , 12 19126 24936 , 00 , 12 637, 66 733, 90 , 12 21634 25197 , 00 , 12 721 ~ 25 S 734, 00 , 13 24166 25460 , 00 ~ 13 805.67 = o T STORM 734, 09 , 14 26541 25688 .00 . 14 881', 42 ¦ ~ U b ~ ~ ~ M~ 734, 10 , 15 26724 25714 .00 . 15 890.95 O ~ ~ ° 734, 20 , 19 29309 25969 .00 , 19 977. 17 1" STORM DRAWDOWN = ~ ~ 0° 734, 30 , 19 31918 26225 , 00 , 19 1064, 13 734. 40 , 21 34555 26482 , 00 , 21 1152, 02 " U 2 1 /4 DIA. HOLE ~ ~ 734, 50 , 22 37215 26741 .00 .22 1240, 72 ~ ~ N p a ~a 734. 60 , 23 39901 27000 .00 , 23 1330, 28 ~ t~ ° 734, 70 , 24 42615 27262 .00 , 24 1420. 76 Z [1 734, 80 , 25 45354 27524 , 00 , 25 1512. 06 W ~ W EDW #2 IN loo 734, 90 .27 48121 27788 , 00 , 27 1604.29 „ 0 N Z PROP. 18 oC 7 0 .27 50912 28053 ~ 00 , 27 1697.34 35 0 0 00 EDW #2 OUT 1 W CL III RCP W Q 735. 10 , 28 53730 28319 , 00 , 28 1791.28 ~ Z ~ 735.20 , 29 56576 28586 . 00 , 29 1886, 16 735. 30 , 30 59448 28855 , 00 . 30 1981, 88 N 735. 40 ~ 31 62348 29125 , 00 , 31 2078, 56 ~ Z Q W p. 735.50 ~ 32 65273 29396 , 00 , 32 2176, 08 BMP TRASH RACK 0 ~ 735, 60 , 33 68225 29669 , 00 , 33 2274, 50 U ~ c o (SEE DETAIL) Z U N 735, 70 , 33 71207 29942 , 00 , 33 2373, 90 735. 80 , 34 74214 30217 ~ 00 .34 2474, 15 z 735, 90 , 35 77251 30494 , 00 , 35 2575, 38 w J 736, 00 , 36 80313 30771 , 00 , 36 2 77.46 1-YR STORM 736, 01 , 36 80631 30798 , 00 , 36 2687, 74 24"W X 24"H X 1 4" SOLID GALV. N 736, 10 , 43 83403 31038 .00 .43 2780 52 STEEL PLATE FAS ENED WITH 736, 20 , 56 86521 31305 , 00 .56 2884, 60 - BOLTS AND SEALEO WITH SILICONE STEPS 1.0' SPACING TYP.) 50 YR. WSE 738.15 ( 736, 30 , 73 89664 31574 , 00 , 73 89, 54 ~ ~ 10 YR. WSE= 737.49 TRASH RACK 2-YR STORM 136.38 , 87 92081 31790 , 00 .87 3074. 19 6"x 18"z 1 4" GALV. PLATE ~w~?'~jp14401jrrrr~rl~~ - / ~~i 2 YR. WSE- 736.38 T T 736, 40 . 91 92837 31844 , 00 , 91 3095, 46 - TRASH RACK (4 AT EACH JOIN BOL ED oeeeeee 1 YR. WSE- 136.01 I ~ ~ °eo TO R SER} ~ v eo 0 7 736, 50 1. 11 96034 32115 , 00 1, 11 3202 23 SOe ~u1 °oYN 736, 60 1, 33 99258 32388 , 00 1, 33 3309.92 0 ae~ _ ~ ~o Wo = TOP 737.49 _ _ 736, 70 1.54 102512 32661 , 00 1, 54 3418, 59 - - 736. 80 1, 76 105791 32936 , 00 1, 76 3528, 12 - =U°~°~~ zg'~= 1 oW ° 736, 90 1, 98 109099 33212 , 00 1, 98 3638, 62 ~ ~y o C~ o°~t/ 0.80 • MIN. PRECAST RISER SEGMENT : ° e° Q- 737, 00 2, 20 112434 33489 . 00 2, 20 3749, 98 :,d' oo°° F • EL.=736.01 WITH FLAT TOP i~~~ ao ~F 737. 10 2, 42 115796 33767 , 00 2, 42 3862, 26 737.20 2.62 119187 34046 , 00 2, 62 3975, 53 liphuu n~NN~~~~ 4 z4 JUNCTION 0.2 W z 0.1 H HOLE 4' z4' J NCTION PRECAST RISER r""""' 5" BOX TYP 737.30 2, 82 122605 34326 , 00 2. 82 4089, 65 „ _ " BMP TRASH RACK BOX (TYP) SEGMENTS „ „ 1 STORM WSE- 734.09 ~ 737. 40 3, O1 126053 34608 .00 3. O1 4204. '?7 24 W X 30 H X 1/4 SOLID GALV. = (SEE DETAIL) a• a 10-YR STOi1M 737, 49 3, 17 129133 34862 , 00 3, 17 4309, 10 737.50 3, 24 129527 34890 .00 3.24 43 , 80 SEE DETAIL THIS SHEET. " ° ( ) 1 DRAWDOWN 737, 60 5, 11 133029 35174 , 00 5, 11 4439, 41 - " IA H L 1 2 1/4 D O E WATER TIGHT CONNECTION 737.70 8. 12 136562 35459 , 00 8. 12 4560. 19 _ ~ PROVIDE SLUICE PROP. 18" INV. 733.00 GATE FOR 737.80 11, 90 140122 35745 , 00 11, 90 4682, 61 CL III RCP ' EMERGENCY DRAIN 737, 90 16, 30 143712 36033 , 00 16, 30 4806.69 738, 00 21, 24 147329 36321 , 00 21 ~ 24 4932. 19 BOTTOM= 731.50 " 738, 10 26, 64 150974 36600 . 00 26, 64 5059.09 A 50-YR STORM 738, 15 29, 51 152809 36740 , 00 29.51 5123. 14 738, 20 32, 47 154649 36881 , 00 32, 47 5187, 44 e~ ~ .a INV.= 731.40 , . 20 / , , a' PRECAST RISER 738, 30 38, 69 158351 37162 , 00 38.69 5317, 03 2 IN lYR „ • . • ~ \ SEGMENT WITH BASE EDW # 738, 40 45.27 162082 37445 , 00 45.27 5448, 00 G i' ~r \ • i 738, 50 52. 17 165840 37728 , 00 52, 17 5580, 16 EDW 2 OUT lYR U ~ ,CONC. ENCLOSURE ~ # 738, 60 59, 39 169626 38013 , 00 59, 39 5713, 58 i\/\i 8 / SHAPE BOTTOM TO POUR IN BASE TO 738, 70 66, 91 1.73443 38299 . 00 66, 91 5848, 33 z SLOPE INVERT COUNTERACT ~ 738, 80 74.69 177286 38585 . 00 74, 69 5984, 22 TO OUTLET BUOYANCY a 738, 90 82. 75 181161 38873 , 00 82, 75 6121, 42 CO STRUCTURE NOTE :ALL JOINTS BETWEEN PRECAST w DETENTION NTROL 739, 00 91, 05 185061 39162 , 00 91. 05 6259, 75 739, 10 99, 58 188991 39452 , 00 99, 58 6399, 27 RISER SEGMENTS SHALL BE ° 739, 20 108. 35 192952 39743 , 00 108, 35 6540, 08 STANDARD 4' x 4' JUNCTION BOX OR EQUNALENT MADE WATER TIGHT WITH 739, 30 117, 33 196940 40035 , 00 117. 33 6681, 99 (PRIVATELY OWNED AND MAINTAINED) BUTYL RUBBER 0-RING 739, 40 126, 52 200960 40328 ~ 00 126, 52 6825, 16 PER NORTH CAROLINA DOT GASKETS. o z 739, 50 135. 90 205006 40623 , 00 135, 90 6969, 43 NOT TO SCALE 739.60 145. 47 209082 40918 , 00 145. 47 7114, 87 .739. 70 155, 23 213191 41214 , 00 155.23 7261. 56 N 739, 80 165, 15 217326 41512 .00 165, 15 7409, 33 J 739, 90 175, 26 221493 41810 , 00 175, 26 7558, 36 740, 00 185, 51 225688 42110 , 00 185, 51 7708, 45 o g U ~o~~ ~o~ O Q M O 1' STORM ROUTING SUMMARY - - 24"W X 30"H X 1 4" SOLID ° METAL GRAl1NG (GALV, STEEL) / ^ " STEEL PLATE BOLTED TO U o WELDED TO i/4 SOLID STEEL PLATE Z ~ W -M INFLOW/OUTFLOW HYDROGRAPH SUMMARY (3"z1" MAX. OPENING) STRUCTURE WITH SILICONE ~ ~ ~ W~ x ~ x -j=°3 a Z?wo Peak Inflow = 13.57 cfs at 715, 00 r~ln SILICONE SEALANT ~ Z z ~ ~ pC ~ ~ °a ~ ' „ 18 „ W ~ ~ 4~ N~coc~ Peak Outflow = . 14 cfs at 1171, 00 Min 3 3 n n HOE U w aw~~ Z z°N~ 2 1/4 1 STORM ORAWDOWN L Z Z° 0 ~ o az ~ ~ ~ °V I ~ e •a~ ~ ~Q000p V NN Peak Elevation = 734,09 ft ' •a ~ WOO f0 ~ J<Y 000 Peak Storage = 26541 cu. ft e ~ ~F-r~M Q V o~r~~ e, • ~QI~1~~~AA NwOO ' n rWw v~ • 24 1-YR STORM ROUTING SUMMARY .a; • a ,e. a a INFLOW/OUTFLOW HYDROGRAPH SUMMARY e~, a• o ° Peak Inflow = 37, 90 cfs at 715, 00 r~ I n o ° ~ r-> Peak Outflow = , 36 cfs at 1224, 00 Min a~ o » n ~M 3 3 Q EDW #2 IN 2 r Y _ ~ .z Peak Elevation 736,01 ft ~ = ft o N oz ~ as F- U O~ Peak Storage 80631 cu, EDW #2 OUT 2 r ~ Y RISER STRI U ~ RISER STRUCTURE FLOTATION CALCULATIONS ELEVATION ~ ~ X Y ~ x I. WEIGHT OF N J W J ~ D 3J0°OiD OJO~ I. WEIGHT OF WATER DISPLACE 2-YR STORM ROUTING SUMMARY ~OOOrn ~ W ~°tDl CONCRE' N R TE BASE = Ah ~ Q v o`-~M Q Nw~B° INFLOW/OUTFLOW HYDROGRAPH SUMMARY = 6.17 ft 6.17 ft 0.67 ft = 25.51 ft s t 4" I STEEL PLATE ° W w o^^ ( ) ( ) ~ / SOLD ~ O ~ 0 TED TO STRUCTURE ° ¢ ~ ~ ~ ° ~ N BL Peak Inflow = 46, 09 cfs at 715, 00 MIn MANHOL MANHOLE = Ah M Peak Outflow = , 87 cfs at 939, 00 Min _ (4.83 ft) 4.83 ft) (4.49 ft} b = 104.75 f ~ Peak Elevation = 736,38 ft Peak Stora e = 92081 cu, ft ® WHERE I WHERE h = 10 YR. ELEV. -BMP INV. METAL GRATING (GALV. STEEL) 9 n Z = 737.49 - 733.00 ' WELDED TO 1/4 SOLID STEEL PLATE ~ ~ r~~~ uuu u uuu u uuu (SUUu _ '+.4y IL d, `J Al NINA. W-LI91IW) mmm Timm may cv . 1 TOTAL 1 TOTAL VOLUME DISPLACED = 25.51 + 104.75 = 130.26 1 ui 0 10-YR STORM ROUTING SUMMARY TOTAL V ° TOTAL WEIGHT OF WATER DISPLACED = (1.3)(130.26 ft3)(62.4 lb) = 10,567 lb ft3 ..A , 1 INFLOW/OUTFLOW HYDROGRAPH SUMMARY - WHI WHERE 1.3 = FACTOR OF SAFETY a,. Peak Inflow = 71.47 cfs at 715.00 m i n Peak Outflow - 3.17 cfs at 789.00 Min 11. WEIGHT 01 Ii. WEIGHT OF CONCRETE W 70 Peak Elevation 737,49 ft VOL COP VOL CONCRETE BASE = A h Peak Storage = 129133 cu. ft (6.17 ft)(6.17 ft) (0.67 ft) = 25.51 ft3 ~ SECTION j A VOL MAI VOL MANHOLE WALLS - [A (OUTSIDE WALL) - A (INSIDE WALL)] x H 0 > Z 1 DRAWDOWN OVER 2 TO 5 DAYS = [(4.83)(4.83) - (4.0)(4.0)] 7.99 NOTES: = 58.56 ft3 1. ALTERNATIVE CAGE CONFIGURATIONS ARE ACCEPTABLE AS LONG AS THE FLOW VELOCITY n OUTSET COMPUTATION 50-- THRU THE CAGE AT THE MAX. BMP POOL ELEV. IS LESS THAN 0.15 FPS. z ui VOL. CC VOL. CONCRETE PLACED IN BOTTOM OF MANHOLE 2. THIS DETAIL (METAL GRATING AND STEEL PLATE) MAY BE APPLIED DIRECTLY AGAINST THE DETERMINE THE REQUIRED ORIFICE SIZE FOR EACH EXTENDED DETENTION FACILITY VOL. = A h RISER. Z = (4.0 ft)(4.0 ft) (2.0 ft) 3. FOR LARGER CAGES (HEIGHT > 5) A 3'x2' HINGED GATE WITH LOCKING MECHANISM SHALL - 32.00 ft3 BE INSTALLED ON THE FRONT FACE OF THE CAGE. LL 40 (A) 1" STORAGE REQUIREMENT (S) (a) 35,360 CF (SEE SHEET D6) EDW #2 IN 10Yr TOTAL 1 TOTAL VOL. CONCRETE = 25.51 + 58.56 + 32.00 = 116.07 ft3 (B) MAXIMUM HEAD (h) AT THE REQUIRED 1" STORAGE FROM 30EDW #2 OUT lOYr TOTAL ~ TOTAL WEIGHT OF CONCRETE _ (116.07 ft 3)(150 lb) = 17,411 ibs THE ELEVATION-STORAGE CURVE FOR THE FACILITY (b) 1.60 FT (734.60 - 733.00) ft3 BIVIP RELEASE HOLE AND TRASH RACK DETAIL 0 1 CONCLUSION ; CONCLUSION : 10,567 lb < 17,411 lb N.T.S. (C) PEAK OUTFLOW RATE (Qp) AT THE MAXIMUM HEAD FOR A DRAWDOWN THEREFORE RESISTANCE TO FLOTATION IS ACHIEVED. N TIME OF 60 HRS [Qp - S/(1.0 x 3600 x 60] 20 # m 0.00000463 x LINE a 35,360 = c 0.1637 CFS D REQUIRED ORIFICE AREA A A= Q p/(0.6 x 64.4 x ho-' 10 0 Z W LINE (c) 0.1637 [0.6 x (64.4 x LINE (b) 1.60 0'5] (d) 0.0269 J (E) DIAMETER OF A CIRCULAR ORIFICE W 2.0 x (LINE (d)_9.0269/3.1415927) 15 (e) 0.185 FT 500 1000 1500 2000 2 1/4" DIA. ORIFlCE Time (min) Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001SWMPOSTI File No. NC Tax Map No. SHEET: D15OF D20 ~ ~ F- 0 U U EDW #2 -1" HYDROGRAPH EXTE U _ ? U _ Y " . Q - W PO a ~ U ° D Z O N N ~ N ~ g W Z Z (3 Z ~ 5 n. ~o M N V o ~ ~ S o0 ~ MN O ~ i _ EDW #2 IN 100 U ~ W ^ n~ io EDW #2 OUT 100 1" STORM DRAWDOWN ~ ~ 5 1 2" DIA. HOLE ~ p Q / ° o a ~ Z LL W ~ F'L ~ ~ Z ~ M 00 „ W c0 PROP, 36 W Q Tp CL III RCP Z I N 0 Z n. a ~ ~ W 0. 0 n c~ U ~ 0 0 Z U N .ni 0 BMP TRASH RACK ~ X000 ~ ~~~0 SEE DETAIL ~ ( ) z u_i I ~ ~~~ru~ (~u~a) 24"W X 30"H X 1 4" SOLID GALV. STEEL PLATE FAS ENED WITH , EDW #2 -1-YR HYDROGRAPH SEALED WITH SILICONE STEPS 1.0 SPACING (TYP.) a??ulmu BOLTS AND u?? ~N,,,,~~ 50 YR. WSE= 741.51 TRASH RACK . WSE= 740.39 6"x 18"x 1 /4" GALV. PLATE 0°°0peo pi, 10 YR TED ? ~a °0 2 YR. WSE= 138.18 (4 AT EACH JOINT BOL ~ v e 007 TRASH RACK TO RISER : ~ o ,n M e~N YR. WSE= 137.93 ) o o~,o 1_ ado ~-',~o = =U°tn ar0 Q3Z°-~= TOP= 740.39 Sti o ~ o ~ W ' s ' 1 :r °0 000 2.70 ;MIN. .,~t~~ 0 00o F~ EL.=738.78 PRECAST RISER SEGMENT o 7~ WITH FLAT TOP y~'i4q~ ??~~0`0 ~n~u?uuuuun?+? ' 'JUNCTION OLE ~ PRECAST RISER 4x4 0.8 W x 0.4 H H 4x4 NCTION " ~ BOX TYP SEGMENTS ~ 60 5 BMP TRASH RACK BOX (TYP) a " = 735.50 a. ° 1 STORM WSE (SEE DETAIL) " 0"H X 1 4" SOLID GALV. - 24WX3 / SHEET. " OWN (SEE DETAIL THIS ) 1 DRAWD " TER TIGHT CONNECTION - OLE WA 1 5 1/2 DIA. H " PROVIDE SLUICE PROP. 36 EDW #2 IN lYR INV = 734 00 GATE FOR CL III RCP ' EMERGENCY DRAIN ~0 EDW #2 OUT 1YR BOTTOM= 732.50 ~ d , ~ , / INV.- 732.40 30 . , ' ~ ~ 4 a' ~ \ PRECAST RISER •e. ' ' ' ' / 2.0 ~ ~ ~ SEGMENT WITH BASE d ~ ~ \ 20 • ~d. ~ ~ • ~ - + / / ' ~ ~ : ~ ° ° ' a CONC. ENCLOSURE „ ~/~i ~ POUR IN BASE TO o 8 / ii. SHAPE BOTTOM TO COUNTERACT a SLOPE INVERT ~ 9~ TO OUTLET BUOYANCY N • ALL JOINTS BETWEEN PRECAST o UCTURE NOTE ' OL STR ON CONTR TS SHALL BE DETENTI RISER SEGMEN ~ QUNALENT MADE WATER TIGHT WITH BOX OR E JUNCTION DARD 4 x 4 STAN - INC BUTYL RUBBER 0 R p 5~~ 9 11 ~ RIVATELY OWNED AND MAINTAINED) Z (P GASKETS. PER NORTH CAROLINA DOT NOT TO SCALE ~levoe ~e~ais~j i ¦¦J . g U EDW ~k2 - 2-YR HYDROGRAPH O 24"W X 30"H X 1 4" SOLID ~ / M METAL GRATING (GALV. STEEL) TO I " STEEL PLATE BOLTED Q ~ p WELDED TO 1/4 SOLID STEEL PLATE WITH SILICONE Q s N " " ING STRUCTURE (3 xt MAX. OPEN ) N o U r ~M " ~ ~o SILICONE SEALANT Z ~ n „ 18 3" " " AWDOWN HOLE ~ ~ x ~ ~ ° x 4 3 5 1 /2 1 STORM DR 7~~3 ~ Z~wp° ~ Zw a ~a~M _ U W a~~~ Z z°N~ Z p Z Z i l O~pV I I d e ~ ~Q~OnO V_ U _MM 24" vUi W~~~ ~ ?~~o~o ' ~ C l~i~MM Q U O~MM am 3 NwOMOM ww U) .~-°w ~d.' a, ' e a a. d' RE FLOTATION CALCULATIONS RISER STRUCTU ~5~ EDW #2 IN 2yr RIS EDW #2 OUT 2yr I~~ „ " ~ R DISPLACED 3 3 IGHT OF WATE I. WE ~M _ Q CONCRETE BASE Ah s = 25.51 ft z -z _ (6.17 ft)(6.17 ft) (0.67 ft) EVATION ' a ~ ° a EL N O Q p- r , ! , . _ e ~ e.~ U ~ e~ ~t~.„I~-' - ~ ~ x Z Y ~ a _ (4.83 ft)(4.83 ft) (6.39 ft) ~ ~ Q ~ i NJ JOCO = 149.07 ft3 z=oom U p~ m O mn 1/4" SOLID STEEL PLATE oC ~ ~z , I ~ ~ o I I WHERE h = 10 YR. ELEV. -BMP INV, ~ TED TO STRUCTURE Q ~ p ~ M M Q f~!I w ~ ° BOL (~J ZZnn f" O Q~NN = 740.39 - 734.00 - x o w r... M ~ p~ ao W oo~~ = 6.39 ft ~ ~ oQ~N ~JNN Q Ih l+-w O N CD~~ TOTAL VOLUME DISPLACED = 25.51 + 149.07 = 174.58 . ' METAL GRATING (GALV. STEEL) ~~0 '9 ~I 2~0~ = 174.58 ft3 62.4 Ib = 14,162 ib ' ° "SOLID STEEL PLATE T OF WATER DISPLACED (1.3)( ) ~ WELDED TO 1/4 TOTAL WEIGH a , ft (3"x1" MAX. OPENING) WHERE 1.3 =FACTOR OF SAFETY 1 N ~ 1 ~ ~ie~u~ (u~aBe~) u. IGHT OF CONCRETE II. WE y _ ~ n W 'ROW CONCRETE BASE = A h VOL EDW #2 -10-YR HYDROGRAPH 6.17 ft 6.17 ft 0.67 ft) 1 = 25.51 ft3 x VOL MANHOLE WALLS [A (OUTSIDE WALL) - A INSIDE WALL)] H 34.83 - 4.04.0 8.39 =61.49ft3 VOL, CONCRETE PLACED IN BOTTOM OF MANHOLE SECTION *0 VOL.=Ah Pm wo = 0 ft ft) (2.0 ft) _ 32 3 NOTES- - 32.00 ft3 ft RATIONS ARE ACCEPTABLE AS LONG AS THE FLOW VELOCITY 0 > J 3 1. ALTERNATIVE GE CAGE AT THE CONFIGURATIONS BMP POOL ELEV. IS LESS THAN 0.15 FPS. GRATING AND STEEL PLATE) MAY BE APPLIED DIRECTLY AGAINST THE 4c TOTAL VOL. CONCRETE = 25.5 1 + 61.49 + 32 ft 00 3 RISER. 119.00 ft)150 lb) = 17,850 Ibs 2. THIS A 3'x2' HINGED GATE WITH LOCKING MECHANISM SHALL z ui p. TOTAL WEIGHT OF CONCRETE = ( (HEIGHT > 5 : s .00 = 1 19.00 ft THRU THE TAIL CAGE BE INSTALLED ON THE FRONT FACE OF THE CAGE. CONCLUSION 14,162 lb < 17,850 lb 3. FOR LARGER CAGES (HE DE EDW #2 IN 10yr cot THEREFORE RESISTANCE TO FLOTATION IS ACHIEVED. 1~ u. 0 EDW #2 OUT 10yr BMP RELEASE HOLE AND TRASH RACK DETAIL ui 0 0 S. >m N.T 1 CIO 0 m W J W 500 1000 1500 2000 Time (min) SHEET: D16OF D20 ~ ~ F- ~ U U U = Z U Y J d ~ ATAT 4U~ w o~ ~ G N G 9. -SLOPE ASINOICAIED (Ni P1N15 ~ i Q10 = 2220 CFS d ~ _ _ _ ~ CONCRETE DIAIEN5ION5 ~C--.2 Y PIPE - _ - - - - = 11.36 FT SEC ~ U ° v10 / R N - - WAl.I OUi IN FAIN 6~ ~ ~t~• Z o _ _ _ - _ - - - - - T ~ ItIK. DIA GIA 11 A 8 C E F G W K AI 2 1/4 19 1 2' IS- 171_/1 20" N` B' 7 12° 1_ B` 1) Ip_ S~ N 1_I~2 _ 2]_ IB' 31_ 20- 11' B' 9' B" I 12 I I - - _ _ _ 1~ N ~ N Y I I 1 CON( C Al JO' N' ]B'-_ 20' 30- B` 11" 4 B 11 -15 1' I-I"----}~ i 1 1 ( I I I I ° PN'F PIPE } 12 ~ J7" - }p' /S' 20" 1/" 12 15' 6' B' -B JI 18' ac g 4' aa' J6 52' ]1' 41 12 IfC 6' 8' 8' ~ 7?. wZ a n C01( / 1 2 -Sir-- /2' S9' 31" IB' 12 21r-6' B B' J4' 2fi" - I I ~ OOWEI ! I { 1 ~ ~l ~ _ L.. i 66r S2 -T2 21 b' B 8' 34 29 I ( i 5 5B B - _ I3 ~ - _ - u 5 12 65" .5a' - " 1 6' 8' B" 38' J}' - _ I - - ]2' 91 2' 2T - - 5 l _ ~ b' _ 72' 60' _ BD 36" 66 12 3D 8 _12 12 46 J6 F - ----------I------- FOUIIIIG _ B b 1/Y 79 66 B7 16 72' 12 33 8' V2 12 St a0T ,I. ry ~ \ li Z M - ~ ~ ~ s o -•UPiIONAL COItSIRUl;IIUk JOINT _ _ - - ~ _ C~~~~T~~~~ (IF COIISf 101Nr USED) 7" B6' 12~ 9a' 36" 78' 12' ]b' B" 12' 11' SB' iS" iL1..l<~ - - - J.11 x.1.1.1. i L11.1S 111 FR T VIEW _ ~ ~ ~ O ~ ~ o ao \ _ ~ I _ ~ U ~ N> DOWELS IN ENDWALL WITH REINFORCED CONCRETE PIPE REINFORCING G- I I I ~ ,4 I PIPE SINGLC PIPE - OOUBIf PIPE- - -.1 U DiA 13 iB Z4' j0' 36 . -iB' 13 I~ 'ji ~0 j6' -41' -lfi ' "C" BAR 'D' BAR - , E I ~ N E I I / ~ ~ I \ a o e• - - :k Y :Jf -Y :K::%. :X. :K. .A y :M, Y DIA - ~ - f / BAR c I]TJI`s _:x.:>i_ 'x' `>i` _ _ _ _ _ _ ko _ECr riD Ecl. - ~ I - ~ D Q / ~ ~ ~ LL ~ u Oirr~ - - - - 2 2 ~T 1 7 _2 _1 2 2 ? _ ~ll_ 12' 1. l 4 1 S 2 2 ] 3 1 a 5 1B' / 2'-]' / 2'-2' 1--- 20 -66 RCP ~ 0.50 DROP Z ~ a STOP = 7320 _ G OFY 2 2 _ _ TOf LBS 9 9 II N ~ f9 55 b5 ~ 11 I 19 i9 2j -77- ~~92. 21' 1 2'-9' 1 2'-B" d 0.50X W . ~ ~ ~ 0 ~ Z BOWEL BAR "X° DOWELS {N ENOWAIL WITH CORRUGATED METAL PIPE 1. SEC tu)Irs T)u 5EA No 2N 16© J6' / ]'-9' 1 ];-e' _ - _ ~ t PIPC SINGES PIPC - _ - OOUBIE PIPf • ~ (iFGARt11NC, Y F3AIfS 11• a 4'_J• a j 2' ~ I / W t0 0 ~11A t~ IB 2/' 70' 36 ~2' 1i1'•---1 1~ r14' JO J6' 4j` _aB 48' 1 4'-9' 1 B c 6uls '~''M' ~ 'll"x' ~li r Y K::K..%. Y 'r' r 2 CiJIIWAI I S > ae" RFFFR _ - _ - - I ' W Q ~ Z Y I C flh 1 7 1 1 5 7 2 J ~.t ~ 4 J 111 Ni:UUI SIANf1AR(i F(IN 54 4 5'-]~ a 5'~-2' ~ I - ) 2 I I I 1 2 2 2 1 7 ~ I~ - I N _Oil_ - - _ _ Iullvrnll> Il(IU 60' 4 5'-9' / S'. B• i ,f - - - - ~ / O ~ ~ N _ UIY 7 7~ ) 3 1 1 5_ _2 1 3 3 < 4 5_ _ 1(11 IDS 9 B 11 II 19 Sj 67 11 I f6 I-9 11 g5 PE 51AIF0 iIFSINf, 66' 4- 6'-J' 1 6'-2` _1,_-.-r-- / a Z Q C~ v / O J th DIMENSIONS AND QUANTITIES 1` _ _ z ~ 1 --~`~--_USNIG•COtKR [PIPE _ USING COR- R~(D 1~EiN. PIPE ~ ~ TQ VI U ~ n O / Z C ~ - '~iIl~a IY I 1 II lf~6j ~ I~~ l'ONIAON DIUENSIONS SINGES yptlUBiE PIPE - r _ - - - TO VI W _ U N o / _ D 11 - B- G l l CU. YO N E CU_YD --11-- B _ -G _ L f.U YO _k L CU. YU - "I)" 13AR5 Al 12' ON CENTER _ BAR 12" 0 C -;5'- S' 1'-B' E•.9' I )/B 5' b' 0711 2'-2' 7'-B' 0974 T-U-1'-6' 1'-6' S' 0' 0.513 1 It1i''fi' 076(1 W 1~- "C' DAHS AT t1' ON CENTER d 1!}'~ 7-T P~iO 7`~j' ~2. ~ E'~1' 0958 I'~9' 8' it 1.271 ~1'~! i' 8' 2' II ' 10 01 j j'.j 9'~1' ~i 01/ _2+•- i•_~• j•_i' i'-o•21J2 e'go' iios j'=3' ii'=S joiB 9'~9'i'=ii 's'-~' '.a' ij !"b io' 1' i39t REwsloks_. ~.i _ R VISIONS JD 1 -9 1 -S a'-7' 2 3j 9'-7" 1145 a_3 I!'_5' Y 920 a'-J' I; ,1' aT•5' 8'_IO t 751 )~9 12' 1' 2 )4B t70 DATE DESCRIPTION - s- c n E _ - 36' S'-3' 2'-B' S'-6' 3 11 0' ]OU) 5'-0' 1fi-n 1086 1 9 Z 5 5 2 1<J 4 2156 1'•6` U' IFI j18B I 5/99 DELETE SPIASII F40 kU7E S v~ E V _ a NO DATE UESCRIPNDti - -c- ~ r~ - r- -r- - r--c - r•- ~ r _ - - /2 55=10 2-II 6-4 T1J312-8 at20 5-IOIB-6 55]1 5-) 2-B S' 11'11' IU 3710 S-.1`i1'-I 4111 ' i 7j00 AODEO NOTE 2 jB' 6r S' 3r~ ~T~-j' -T. la-+ 5515 6_B 11_•0 L127 5 _9 2'-11 fi _8` I! 1 ~l1 e':~o 19'_4' S_Bi3 APPROVED DATE _ ~ ~ / ~ ~ ~~~~nnnnnuuruuq~ _ CONCRETE ENDWALL FOR CIInRLOTTF - M1?CKLENBi.frtG . ~ 00000 ~ ~~G/ (.rrnRl,oTTr ~1r,r.,rti.rNr3uRC WALL WITH SP aF)>41~NT ONCRETE W{NG , ) . , _ _ 1-,AND I)f..VhL C WITH SPLASH PAD fly R~- / o° °000 v°°° @t1ee~ 1) n]',vr[,()I 1`ti.N1 SINGLE AND DOUBLE PIPE CULVERTS s1~.;;~ ,~E~. r,n N _ , 11 1. STAN~AI~DS 20.17A / / ~ ~ 0 °oN s'rnNnn[~I)s 15 TI~RU 4D PIPE :~n.1 rIA J~ e c ~ - U uW N ~a ~ a°v~ O o° ~ y e~ 41: ~ % ~ °e veoe° ~ \ ,,,~~~`III a`a`~~\\ ~ mnnnnuun d 0 GENERAL. ~IOTES•, GENERAL NOTES: I ' TO BE CHAMFERED 1" 1. ALk- CORNERS E, 1, ALL CORNERS TO flE CHAMFERED 1" IF CONCRETE, ~ - SCALE: 1 "=10' ~ ~ -i CONTI~ACTOR WiLL BE. REQUIRED TO PLACE 2-#6 BARS "Y" IN THE TOE' fl E ' 1HE CONTRACTOR Will_ DE RF(}UIRED TO PLACE 2-#6 DARS _ #6 QARS Y IN THE TOP OF ALL ENDWALLS FOR PIPE CULVERTS 4?" AND OVER WITH A MINIMUfd 3 2. )VER WITII A MItJIMUM 3" TAN NDWAL.L. OF ALL ENDWALL FOR PIPE CULVERTS 42'~ AND OVER WITH A COVER AND A LENGTt{ OF 6 LESS Tt E - COVER AfdO A LENGTH OF 6" LESS tHAN ENDWALL. -L, z 0 FORMS ARE TO BE USED FOR THE COr~STRUCTiON OF THE BOTTOM SLAD. 3. OF THE 80TTOM SI Af3. a v FORMS ARE TO BE USED FOR THE CONSTRUCTION OF THE B~ WALL TFH(,KNES5 (T) SHOWN iS NOT TO BE INTERS RETED TO 3 4. RIP-RAP APRON DESIGN (PER CHAR/MECK STORMWATER DESIGN MANUAL): N W MEAN THE THICKNESS ACCEPTABLE, 8UT IS t1SED OP1LY ~ T SI-TOWN IS NOT TO BE It~1TERPRETE-D TO T - TO 1. MINIMUM TAILWATER CONDITIONS, do = 66" = 5.5' ~ RPRE E_~ 4. WALL. T4-Uta(NES.~ ( ) THEREFORE, 0.5 * do = 2.75' IN COMPUTING ENDWALL {)UANTITlES. ' MEAN THE THICKNESS ACCEPTABLE, DUT IS USED ONLY ONLY 2. SINCE TW = 2.0', USE FIGURE 8-1 FOR MIN. TAILWATER CONDITIONS IF CONTRACTOR ELECTS TO USE CONSTRUCTION JOINT AT BOffOM OF PIPE, 5 d IN COMPUTING EtJDWALL QUANTITIES BAR "X" DOWELS) SHALL BE PLACED IN THE BASE AS ShIUWN ON f'IAN~. 3. BY FIGURE 8-1, THE APRON LENGTH, La, AND MEDIAN Z ( STONE SIZE, d50, ARE 30' AND 1.0', RESPECTIVELY. JO?I`!T AT DOTTOM OF PIPE, SPACING OF BARS TO DE APPROXIMATELY 12" CENTERS UNLESS f.NGiNFER RA TOR F I.ECTS TO USE CONSTRUCTION JO":NT AT DO 5. IF CONT C 4. THE DOWNSTREAM APRON WIDTH EQUALS THE APRON LENGTH PLUS y DIRECTS OTt-IFRWISE• ~ SEPARATELY, THE TOP Of E3ASE S! TALL B(. AND POURS DACE ~E S! TALL QE I Et~T ROUGI I THE PIPE DIAMETER: W = d + La = 5.5 + 30 = 35.5' g 5. MAXIMUM RIPRAP DIAMETER IS 1.5 TIMES THE MEDIAN STONE SIZE: 6. iF CONTRACTOR ELECTS TO USE CONSTRUCTION JO{NT AT BOTTOM OF PIPE, MPRESSIVE STRENGTH. 6. ALL COPICRETE 1O BE. 3600 P.S.I CO STRENGTH. 1.5*d50=1.5*1.0=1.5' AND FOURS BASE SEPARATELI', TI-IE TUP OF BASE SHALL Bf l E.FT ROUGI~I. , ~ 6. RIPRAP DEPTH = 1.5 (dmax) = 1.5 * 1.5 = 2.25 M Q ao 0 7. ALL CONCRETE TO BE 3600 P.S.i COMPRE5SIVE STRENGTH. Q o ° N R_EVISIOt15 _ U ° z W ~M REVISIONS _ t10 DATE _ DESCRIPTION tut DATE DESCRIPTION I 8/00 REVISED-NOTES V ~ ~N W-W, x Y x ~~zw ~ Z~7WO ~ nPPROVEO DATE w ~Z~~ ~ ZZ ~d~M a W ~cp CD U W acW.9~in Z Z~N~ • - ~ : t~ IL1 ~G CRETE WING {I,LNE . P CON CONCRETE ENDWALL FOR (.riARLOr'iC 1`rLCI Z azl I O~ool I E WiNGWALL _ ~000o0 U) V U MM CIIAI2LOT'1'L b9E?CICI,FNE3ElItG ~ ~ 0 1+•IENT _ LANll DLVLL P f N N Wpc~OC^D Z ~ J~woDOo SINGLE AND DOUBLE PIPE CULVERTS D ND ItILN7 WITH SPLASH E,nND DrVFLOC' ST~INDA[2E)S ~~i. F-' r~ M QUO > M LASH PAD 20.17F3 QZ ~a~r. 3 ~ Ni?oo -7 ~ w.~ ~ W ~ D..ti I)S 1~5" THRU 48" PIPE 2o.16D S`r ANDAR A ~ °o A M C Z o A k' ~ k' M - - - - - ~ E3 _a °a - - U _i. ~ _ ~ U 1, U z~ WU x C S~ ~ a a~ d 51_~_-_-... ~ J Li. J J L~ ~ = J~~ C9WOc~0 _ _ _ - ~ ~ Z o ~ ~ of o ~ ~ a"o°~~ a NW~~ PIAN z c~,.,. 1- ~ d LL. N N y~_ Op ~ ~ w W p v appdpp- o0 OaN~ ~JNN .r---- f-tAREO ENO SECTION OR END wall u ~ J 1 a b ~'in.- 4 N ~ - I I- 0 a 6" GRAVEL ON FILLER FABRIC 1 ! 18' Illff18.IffIIATF RIP RAP um ui 0 SECTION A-A 0 PIPE 512E A 0 C D F F C^ Wl RIP RAP IN IUNS - - - - - -1 4 1/22' 3' _ 6 W 110' 7' I I/2 M ROASIMIS 12' 2' n0 RAIC OESCRIP11011 21" 15 9'^ 2 1/2' 1 1/2' f' 7 4 1/2 -12 - 24" 17' 10' 2 1/2' 1 1/2' 1' 8 5 1/2' 15 - - 2- 2' 9' 6 22 0 36" 24' 16' 112' 2 2 - 9 1/2' 7' .3Af)['I?OVFD DATE CHARLOTTE - NIECKLE,NDURG DEVELOPMENT RIP RAP PLUNGE POOL s~~..._R~ LAND Dr r STANDARDS I.. I 7c~ 2a = PIPE SIZE A B C D E F G UJ (a) Z 66" 60' 40' 8 3/4' 5' 5' 23 3/4' 1 17 1 /2 cl) :D m Z J W J J W SHEET: D17 OF D20 File No. NC Tax Map No. Job No. 03-001 Cadd Dw9. File: DRAINAGE/030010UT XREF: DRAINAGE PLAN STATE/03001BASE 755 755 ~ ~ - ~ o --=--11-11-III===11- III i- - 11= U U :I.I~ 1= Table 22 Wtntaad Pleura 750 - 750 ~ MINIMUM EXTENDED DETENTION WETLAND AREA DEPTH DISTRIBUTION REQUIRED; Z 1= seietla{I~ Novo Coromaroid Fmmddian WlieDlie Vs~e Noks U - III= - 1. SEDIMENT FOREBAY 20% OF PERMANENT POOL AREA) co®aonN:ama F«1>a At' Talaaece " " Pelra"dre virglydn Et~gaa ye+ ap f4 t tt. High, Babas ate . Full sun to partial shade PROP. RETAINING (=I WALL 2. HIGH MARSH 35% OF PERMANENT POOL AREA, 0 TO 9 DEEP) Artowetum ernes wooddtrcks w _ S Uaria ladfalia Ettlergeat Yea uP W 1 ft. Maderue. Tubas and Aggressive caloaizer n88 745 , - - Artowheadf Duck seeds astern dndca ~ ~ 745 ~ ~p~~ viraaac>~t Pa>metar yes np to 3 m. High. S~gbads and Tolaaot of flucdtating water ~ ° EX. GRADE ~ ~ - / / / / / / / B~~ btsswxn. Winter food. levels Ar partial shrk ~ I_ ~ II: sad raver Z C ICI 3. LOW MARSH 35% OF PERMANENT POOL AREA 9" TO 18" DEEP a~g~~ Emelgenc yes uptolR Itequiresfuusun. N B B N ' i 11- + + + + + T yes m t R Law. Fxrept s>s Dover ASK. May eliminate ~ Yp~ tPP• op Urt Q 740 - _ + + + + + Catuil Odra spaies. Volumeer. ~ - 740 + + + + + ttatmertt. w z ' _ II III. - ~ 50-YR WSE W 5 t [ow food value. Hood. Free floating SAV. Shade Z CertuophyDaasD Qenwr ubmrlgtn 3'a Y~ ~ i-i I- _ =1. , I ~ ~ 2-YR WSE Q ~ =1 I I 111= 4. MICROPOOL 10% OF PERMANENT POOL AREA cooataa habimtaadsbdtafa toietarn. ttapidgrowth. 5 ~ fish sad m ertebntes - II ( _ Scirpas pwge"s Ernageat yes up to 6 in. High Seeds, cover. Fast caiottiaer. Can tolerate iL - ~ = o 1= ' I I I- _I III Comma? Tbroe,Square Waratowb songbirds paiada of dryness. Frill = o sus Hi maul removal. ¦ ~ U S metal removal ~ ~ M ~ 735 Lannaspp. SnbmetgeoN Yea yes Ltrgh,Foodtor tt>~ o ~ o 735 = 1 ws ~ - ~ _ - i = II - Dnrirwad t watetFowl. and fuh = 1 ~ w _ ~ ' 1= PERMANENT WSE 732.00 _ - _I -III II_ II. 5as+runAr cenuwt Fasergatt yes w to t R tow, except for wood Rapid growth Shade V Lizard's Tail ducks rolaant. ~ ~ r` ~ _ ~ I-- I I I=1 I_ - i - - 731.50 - - - - - - - - Hibiscus ataucheraos Emergent yea oP to 3 is Low. Natar. Pull sun. Can rolerae ~ ~ ~ - ~ - - - _ _ _ _I I=1 - =III .i I I_I i - - - I I _I I _I - I - I Mash Hibiscus 'odic p Poarederia cordara Eaoergeat yes up to 1 R Moderate. Ducks. Full sun m partial shade Q Q .nr ° Pidcaalweed Naar fa buttafltes. Z 730 _ T ~ PROP. GRADE _ _ 730 lli Rettwves Porantogeron patrnams Subtargerrt yes yes Eanamely gh ~ W p~ Wend Waterfowl, mtnh and > ~ I- shasebisids. Q Z III ~ ~ ~ -I Cartier otytadu Emergcat yes oP Oo 3 ia. High Food and Cava. Full sun although taierant of ~ shade. Provides some W _ - - _ ~ -II--- >za w Q ~ z ~ - _ _ III=1 I I-I I-I 0 N 725 725 shore(me stabilization Z Q ~ Carcz tpp. Emergent yes up to 3 in. High, Waterfowl sad Many wedad sad seven{ w a, birds. n o f M o m Scirpus validrs Emergent yes np to 1 ft. Moderrue. Good Dover ruts atm. Aggressive weedy V ~ C Q N ~ u Soft•srem Bullush and toad. alien snd? v P. oHetum ? U N v Fasrgeat yes np a 1 R High. Waterfowl, Feu coionuer. Tolerant of Poiygoontsm sPP• SCALE: HOR. 1 "=20' Smutweat songbirds. Sends sad Ong water lauds. a ~ VER. 1 "=5" raves. _ ~ hrrserst sears Emergent yes uP w 1 R Moderate. Tolaata wa or dry ~ - 755 SoR~ 755 N hsrwrt t yes up to 3 R Moderate [or toad tau Fast atlaoiaa. Tolamt of I ~ ~ ~ fa' Dover. water kvela. / 5 lu / PaAiaat vergaw"t Perime0er yes up to 3 iu. High. 9etds, raver fat Toletata wa sad dry / / Switdrgtsss waterfowl and caaditiow. / ~ bads. ```,pnuuuuuturrqurrr//i i ~ Acarar calmness Perimera yes uP to 3 is Low. Tolasmt of dry periods. Not ) ,q~i~,, - / - $vrat FJag a rapid calooiza. Tolerates oouaoneooo 750 - - 750 moo „oe e,~ ; ~ I=1 I I Low. Goodwataoaygrararor. o°? p °artjl - t- lrlodeu Cmwdensss Submergmrt Yes yes ? D; ~ ~1'`~,Jo i - I=~ ~ Wetenveed High rttrttiata, Dapper, = Q oy n z' ~ - ~ mrmgturoae std c~omium U stn 'fir e~ _ ° -I ~ III- 0 - ~ / - lEil>DVII 01Y O ~p 0~` ` SCALE: HOR.1"=50' _ - - - - (I I- Valimeria maeAcara Submagent yes yea High. Food for Tolerant of smoky water end . ~ o VER. 1 "=5" _ - - - ~ watesfowi. Habitat for hi nuviaat loads. ~ o Doe ~ . WddCelay ~ ~ ~ - - fish and invettebntes. ii~4Oj~ oo ~ 745 745 ~ lfamrta agwadra Enntgeat yes up to 1 R High. Fold fat birds. Praiser full Am q~4irgpr tpu~~~``,~ pQ ~ Wfki ~ unmanu EX. GRADE _ Tabk 6o>le Jot WetLmda Svattans• ssddelina ior~pg diverse sad affative stormwoter wedmda io the tnsd•At -I ~ Sdrnda w - - ~ r- 'S' -I I a - I~ ° - PLANTING WILL BE SELECTED FROM PLANTS IJSTED IN TABLE 2.2 ABOVE (SOURCE, STORMWATER 740 - - 740 BEST MANAGEMENT PRACTICES, NCDENR, APRIL 1999) BASED ON HYDROLOGICAL CONDITIONS AND ~ 50-YR WSE = 738.15 III= AVAILABIIJTY. - - ' I - ! I _ _ _ 2-YR"WSE = 736.38 - I- , , _ ...-s,,. =1~ _ ~ ~ _ ri - ~ ~ I-1 ~ - - Use of Eristint? Hvtlrlc Soil 735 = _ = 735 =III- -~I~' -11 - ~ - F ~ i - PERMANENT WSE = 732.00 - Soil from the existing wetland areas that have permittai for impacts Will be strkpptxl and stored as i T- -III- - feasible for uutiliaation in lining the prolwsod wetland site. Other' topsoil adjacent to the wetlaath - - - - ~ ~ r 731.50 - - - - - - - 731.50 III= may also be sutilrable. Using these exiatntg soils should hasten rho development of vegetated. cover - - - ~ , ~ -I - _ - - - = I I=1 11= =1 1= 1= I =11=1 I I=1 I =1 I I- - _ _ -I I- I I I I I I I .IiI_II -iii-i~= _ _ _ - _ _ _ -iii-iii- i-iii-iii-iii-iii-iii-iii - _ _ _ _ _ 1= - ~ sad hyuiric soil conditions. 'Chit is also tun extxllfsdt use of as impattalrt natual resource. Many of 730 - - 730 tl~ row planted species wtnmtiy exist in the vicinity ~ the area to be utilized for this 729.00 = PROP. GRADE i - function. The majority of rho f:pocies in the utuetlands include Obligate (O$L) and Faa>iltative Wet Z II_ o =III=-==-=====11= _ - (FACVV) vegetation. HerbaoocAts plan specim ptu~at itrclade Sofitush (iutxius effusus), sedge F - _ = I =1 I =1 11= 1=1 11= I = I.11= =1 I_I l i l i l I I i 11= (Carex app.), Dock potato (Sagitatia laxifolia, Arnow arum (]}Ilitaadra virgana), Common Threo~ N - - - - - - - - I w _ _ - - - - - , Square (Scirpus plmgens), Ttwch-mo~not (larpstie~as capensis), Smattweed fTolygonum app.), and ° 11=1 11=1 11=1 11=1 11=1 11=1 11=1 725 =1 I I=1 I I=1 i =1 I I=1 I I=1 11= I I=1 I I=1 txilers. Sulppletneutal pltuntiaga will be fielected from Table II.2 m the Storm water Best 725 Mauaganoat Fractices, NCDENR, April,1999 on at~utai field txmdititms, if required. Being that the site is in the vicinity of odtor wetlands and floodplain areas it is expected that the area will . It is that h~baceaus and scntblshrub ° benefit from the natural seed seurcfx avat'>alble expoctod Z wedaetd spexies will rapidly voluratota~ in the area. SCALE: HOR. 1 "=20' entZatreSchedrtk-ifrmtrlnd N VER. 1 "=5" N g ~otenicat Nauae Common Name Size utg$ U O ~ ~ ~ ~ R ~ ~ / ~ , r ~ _ ~ , \ ~ , 00 0 - ~ ; Juntafss ell'vsos Snl~h Noodle Rush 2 yr. peat pot 3 O/C. 0 0 , ameticenus Common Three Hare 2 3' aC. ' / '-1 \ 0.1 LINE ~ / ~ ~ ~P S9 yr• P~ 1~ o Awns calamus sweet Flt 2 3' ere. U ~ t; Yr~ 1~ Pa z t- w o 0 i ~ ~ / ~ ~ V N N N ~ ,O i _ ~ ~ 2g - W I_- W ~ X ~ F- 40 X ow water Plani~ -j = 3 a Z Z w o a / ~ ' ~ ~ / i ~ ~ z w w Z5 o w ~ ~ w ~Z~~ aZ ~a~M 1 ~ ~In ~ W tr cp cD Polrandta vtrgwcs Arrow Arum 2 yr. peat pat 3 41C. U a w ~ ~ Z Z o ~ ~ W ZOtnN J°N1~ R Sagttana laUfoha Duck Potato 2 yr. peat pot 3 OTC. Z a a z ~ t o~ o o t ~ 2v ' - _ ~ ~ Q ~QChocho to U U _MM ~ ~ ~ _ _ 2$ 7 RIP RAP APRON FINE STO ~ ~ ~ ~ NE , ~ - Saluettus cemns Lizards Ta11 2 pot 3 0lC. ~ w ~ - z - ~ 13 - - n ~ o ~ ~ z 1 ~ ~ ~ Pa Ii~MM OZMM ' i~ ~ ~ , ~ D 32 - 1 , - N lnteum S tterdnck 2 yr. peat pot 3' aC. o w Q ~ J ` 32 i f`r~ ~ N 00 Q W WIDTH AT PIPE - 4.50 , \ P shall be in naturalistic l random cl s to enoour a diversi . S ecific Iatlt s sales, lantm8 ~P ~ h' P P P WIDTH AT END = 10.5 - 34 1 r ~ 34 1 , ` quantities, and size, which will be utilized for the mitigation sites will be dependent on availability, LENGTH = 9 , ~ - ~ ~ ~ 1' co time of 'ear in which plan' occurs. Co~rol struchtres such as setiimentatian tra s, st, y rang p _ ' ~ ~ ~ ~ DEPTH - 9 ~ ~ - 3 - 36 \ 't sihaiion tamers, ancUor at minimum silt fence will be utilized as necessary. 1 , 1 1 i / ~ . - ~ ~ ~ ~ ~ r i ~ ' / RIP RAP APRON MED. STONE , ~ 3eetEGr: Sneaflaetton foS,l1, gba~xo~s sad Coves Glraa ix HreitandMisfeatien, Sites ~ i z r o ° . \ ~ o WIDTH AT PIPE = 10.5 M r~ i - ~ / ~ ~ _ ~ 1- r on kM ~M WIDTH At END - 31.5 ` ; / ~ ~r~y RQ1p ~ ~ a • \ .Z i ~ ~ ~ ~ o ` ~ - ~ ~ ~ ~ / 1 LENGTH = 28 ~ Q ~ ~ Z ~ G7 c~ a " 1-Jut. 15 Red.T Glraes 7 tbelacre tttttt~ H ~ - o ° - ~ ~ 3 - - DEPTH 18 U Smartweed 20 lbs /acre ~ ~ x Z Y ~ X / , / ~ i~ / / / ' ~ ` a a ~~r~a JN~ / ~ / ~ ~ JuL 16- 1 Te C = ~~o~ ~ ~°O ~ roP ~'-'=wm Z-oca _ i / ~ i / ~ i ~ i / / ~ ~ i 3a 36 Jap. Mrllet or Sorghum 20 lbw lacrr ~ o rn m ~ o = ~ ~ ~ ~ H Z ~ J - - 1 1 4 ~ 73 ~ ~ ~ \ Y . . (t0 be fOIlowed ~ peim'dnent m1XtlrTe) Q ~VJ p ~ n h Q a ~ oo oo ~ - ~ \ ~ ZZ~~ ~ ~ Qr+-NN $ - 2 - Nw. l Smartweod 20 lbs lane ~ o ~ 0 0 ~d \ ~ Red Trap Ctre1SS 7 Ibslaae ~ M w~~ ~ N m ~ ~ ~ ~ ~ ~ ~ 1. , y~ ~j ,^~i ~ , Nov. lMarch 31 T 401bsl8cte ~'1 ~mrS' ~P , - ~ ~ 1 Wheat or Wittier o - . , `e,~ n _ _ ~ . . . ~ lrnl~.fi~llnne.tlKr,...,,,n.,aik,..;.r1„rn\ / V , ~ _ \W W aVYVnW VJ ~IWLWWYL yl The following species may be substituted: . WETLAND A A' A r ` J - Btdens connataa (Beggar's Tick) and other 13tdea s speaes JO REMAIN - / r - - Lee = oryzoides (Rice Wpm) - Panicaun vinatum Swi 74 NDISTU•RBE 11 • r li -Peltandravirgittica(Arrow Arnm) J it tng Ins ctions r r , 1 74 q1, lilt 1 Seed in the dry period 1 2) use of a filler, such as sand to dilute the seed to ensure uniform ground coverage whets r. broadeasting / / 0 \ \ 1 \ 730 , 3 tree and shrub should be completed first before ) Pig seeding - 4 Pure live seed shall be specified and raved rior to _ ) app P Plantm& - I 734 'l J o - - ~ _ ~ Herbaceous species may with a wetland seed mix which will result in a coverage of at least 100 736 I / n stems per square meter upon germination. Substitutions may be permitted with approval. Other W - o - native grasses or annuals may be selected. No fescue will be used in wetland areas. Annual 738 I / , r v vv t 1 i + / , 0 0 es shall be uWL d for stabilization on surrounding slopes within Miti 'am Area rather than 73 o o - perennials to allow natural succession. If apetennial is required for erosion control than a nnndatre shall be selected that allows natural volunteering to occur. - 50 DU CN4 13 73 8 6 738 13 / r 7 _ - 752 H r , 4 It ~ ~ ~ I I I r ~ / 1 , \ I 1 I , / / , / 1 1 \ I I r / / ----75 - Ui :CDC 756 " - Z 7 W I I 1 i PLAN VIEW ..z / , ` \ it , f/ 1 1 1 ~ a` 756 i~ W SCALE: 1"=20' File No. Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001SEC XREF: DRAINAGE PLAN STATE/03001BASE SHEET-D18 OF D20 WE 775 770 765 760 755 750 745 740 735 730 725 MINIMUM EXTENDED DETENTION WETLAND AREA DEPTH DISTRIBUTION REQUIRED: 1. SEDIMENT FOREBAY (20% OF PERMANENT POOL AREA) 2. HIGH MARSH (35% OF PERMANENT POOL AREA, 0" TO 9" DEEP) 3. LOW MARSH (35% OF PERMANENT POOL AREA, 9" TO 18" DEEP) +++++ + + + + + + 4. MICROPOOL (10% OF PERMANENT POOL AREA) EXTENDED DETENTION WETLAND #3 SECTION E -E SCALE: HOR. 1"=50' VER. 1 "=5" NOTE: EXTENDED DETENTION WETLANDS TO BE PRIVATELY OWNED AND MAINTAINED X17\\//' , l,' I\ /,_= - _ _ --,-• L /7 io 775 770 765 o f 755 750 745 740 735 PLANTING PLAN Table 2.2 Wetland Plants sekavie Nave ComoerrW inundation IT NOW Caaamn Name Form Availlabi Tolerance High, Waterfowl and Many wedaad and several Pelondm Ili ft da Emergent - III up to 1 ft. Higb. Bermes we. Full sea to partial shade Arrow atom Emergent yes up to 1 ft. eaten by wood ducks Full sum. Aggressive weedy Saggimria lefbtia Emergent yes up to i ft. Moderate. Tubers and Aggresaive colonizer Arrowhead/ Duck potato Emergent yes up to t ft. seeds eaten ducks Fast colonizer. Tolerant of Andnvpogon Wrginkus Perimeter yes rap to 3 in. High. Songbirds and Tolerant of flucnwting water Broomsedse Emergent yea up to i ft. browsers. W rater food levels 6t partial shade Soft Rush /f1F 1 1 1 and cover conditions. And-pogon gloere»aars Emergent yes up to t ft Moderate for food but Requires full sun . Bushy Beardysas hixh for cover. flucauging water levels. Typha app• Emersew yes - Low. Except as cover Aggressive. May eliminate Canal waterfowl and other species. Volunteer. sero Ifigh treatment. Cemrophyaum DWQersmn Submergent yes yes Low food value. Good. Frec floating SAV. Shade Cootuaii /-ITIj tolerant. Rapid growth. fish and invertebrates acidic conditions scirpus pungens Emergent � up to 6 ire. High• Seeds, cover. Fast colonizer. Con tolerate Common illus Squame Waterfowl, songbirds EX. GRADE sun. Ifigh metal removal. (,arura.rpp. Submergent/ yes yes High, Food for high metal removal Duckweed waterfowl, and f set hi starriest load& Saunt»rs cemil Emergent yes up to 1 R Low, except for wood Rapid growth. Shade Lizard's Tail Emergent yes up to 1 ft. docks tolerant HF 1= Emergent yes up to 3 in. Low. Nectar. I Marsh Hibiscus penodic dryness Pontederia cordata Emergent yes up to 1 R. Moderate. Ducks. Full sun to partial shade Pickerety eed f o IF Nectar for butterflies. Poramogero" peakwul s C �I yes yes Extremely high. Removes heavy metes. Pond Weed Waterfowl, harsh and shorebirds. L"rsia onwides Emergent yes up to 3 in. High. Food sad cover. Full sun although tolerant of Rice cutgrass shade. Provides some 1 v 50 -YR WSE = 741.571 ... ... ... ... ... ... = — ...fit... .,. ... ... ... ... ... ... _ 10 -YR WSE- II - v2 -YR WSE = 738.78 - ( i 1= =1 ... - ... ... ... - - ... ... • 1 -YR WSE - 737.93 r F�_ ... -I I II o ... = it - k( �- (1 ... -- ... ... ... ... " 73 WSE = 5.50 ... ... ...�... ... ... ... ... ... ... ... ... ... .., ... ... ... { PERMANENT WSE = 734.00 .. ... __ ... ... ... ... .., ... . .,. ... ... ... ... ... i ... I .., ...--a.. ... ,.. ...��... _ _ 11 �_I _ 00 732.50 — — — _ I � �=1T—� I {_► � ►—� i {=1 � I=1 — — — — ((_ i � 1=► t �=1 � i—� � 1=1 � t_� � 1=( — — — — — — — —� ► I— �I II i —1 I I—III—i 'fl — — — — (= { — I I 11= PROP. GRADE =1 -i � I � I 730.00 ' I-1 11=1 I I -111=I 11=11 I-1 11=1 11=1 I I -FI E 71 -1 l— i 1 I 72¢.0JC _ 1 11711 1= I I_ _ _ _ 1=1 ►_I 1=1► I-1! 1=► I-1 11=1 I-1 I I_I 1=1 I_i 1=1 I -1T_► 1=1 I_Ti I MINIMUM EXTENDED DETENTION WETLAND AREA DEPTH DISTRIBUTION REQUIRED: 1. SEDIMENT FOREBAY (20% OF PERMANENT POOL AREA) 2. HIGH MARSH (35% OF PERMANENT POOL AREA, 0" TO 9" DEEP) 3. LOW MARSH (35% OF PERMANENT POOL AREA, 9" TO 18" DEEP) +++++ + + + + + + 4. MICROPOOL (10% OF PERMANENT POOL AREA) EXTENDED DETENTION WETLAND #3 SECTION E -E SCALE: HOR. 1"=50' VER. 1 "=5" NOTE: EXTENDED DETENTION WETLANDS TO BE PRIVATELY OWNED AND MAINTAINED X17\\//' , l,' I\ /,_= - _ _ --,-• L /7 io 775 770 765 o f 755 750 745 740 735 PLANTING PLAN Table 2.2 Wetland Plants sekavie Nave ComoerrW inundation Will Vdee NOW Caaamn Name Form Availlabi Tolerance High, Waterfowl and Many wedaad and several Pelondm Ili ft da Emergent yes up to 1 ft. Higb. Bermes we. Full sea to partial shade Arrow atom Emergent yes up to 1 ft. eaten by wood ducks Full sum. Aggressive weedy Saggimria lefbtia Emergent yes up to i ft. Moderate. Tubers and Aggresaive colonizer Arrowhead/ Duck potato Emergent yes up to t ft. seeds eaten ducks Fast colonizer. Tolerant of Andnvpogon Wrginkus Perimeter yes rap to 3 in. High. Songbirds and Tolerant of flucnwting water Broomsedse Emergent yea up to i ft. browsers. W rater food levels 6t partial shade Soft Rush \ 1 1 1 and cover conditions. And-pogon gloere»aars Emergent yes up to t ft Moderate for food but Requires full sun . Bushy Beardysas hixh for cover. flucauging water levels. Typha app• Emersew yes up to 9 ft. Low. Except as cover Aggressive. May eliminate Canal waterfowl and other species. Volunteer. sero Ifigh treatment. Cemrophyaum DWQersmn Submergent yes yes Low food value. Good. Frec floating SAV. Shade Cootuaii habitat and shelter for tolerant. Rapid growth. fish and invertebrates acidic conditions scirpus pungens Emergent yes up to 6 ire. High• Seeds, cover. Fast colonizer. Con tolerate Common illus Squame Waterfowl, songbirds periods of dryness. Full sun. Ifigh metal removal. (,arura.rpp. Submergent/ yes yes High, Food for high metal removal Duckweed waterfowl, and f set hi starriest load& Saunt»rs cemil Emergent yes up to 1 R Low, except for wood Rapid growth. Shade Lizard's Tail Emergent yes up to 1 ft. docks tolerant Hibis l yrs nuoschewos Emergent yes up to 3 in. Low. Nectar. Full sun. Can tolense Marsh Hibiscus penodic dryness Pontederia cordata Emergent yes up to 1 R. Moderate. Ducks. Full sun to partial shade Pickerety eed Nectar for butterflies. Poramogero" peakwul s Submergent yes yes Extremely high. Removes heavy metes. Pond Weed Waterfowl, harsh and shorebirds. L"rsia onwides Emergent yes up to 3 in. High. Food sad cover. Full sun although tolerant of Rice cutgrass shade. Provides some 730 PLANTING WILL BE SELECTED FROM PLANTS LISTED IN TABLE 2.2 ABOVE (SOURCE: STORMWATER BEST MANAGEMENT PRACTICES, NCDENR, APRIL 1999) BASED ON HYDROLOGICAL CONDITIONS AND AVAILABILITY. 725 �5 .--_-_----�a' /t "�'\ ', --'_ ��', shoreline stabilization Carex app. Emergent yes up to 3 in. High, Waterfowl and Many wedaad and several Sedges Z ZC>toLr) COS U COc�eN �¢oioco N Wo�� _ songbirds. n ate Seirpus miklus Emergent yes up to 1 ft. Moderate. Good cover Full sum. Aggressive weedy Soft -stem Buhush ------- ------\\\c7 and food. aliens wet as P. per6plistuin Polygonntm spp. Emergent yes up to t ft. High. Watedol Fast colonizer. Tolerant of Swartwood / /'- '. \ \ I ,, �' /,' / �' / `_�\\ ..� —. �. •y. songbirds. Seeds and cover, flacAntittg water levels. luncus effaw Emergent yea up to i ft. Moderate. Tolerates wet or dry Soft Rush \ 1 1 1 conditions. Nuphar ►meant Emergent yes up to 3 ft. Moderate for food but Fast colonizer. Tolerant of S hixh for cover. flucauging water levels. Pankmn vergasum Perimeter yes up to 3 in. High. Sods. cover for Tolerates wet and dry Swbcbpm waterfowl and conditions. sero Aconrs ciskin rs pers:noeter yes up to 3 in. Low. Tolerant of dry periods. Not Sweet Flag a r aid colonizer. Tolerates acidic conditions Eloden c anadensis Stitbmagent yes Yes Low. ami water oxygenator. Watetweed Argh mttrient, copper, manganese and cbromium removal. Vaunwria wwrkmar Sulnrrergerrc Yes Yes High. Food for Tolerant of murky water and Wild Celery waterfowl. Habitat for hi starriest load& fish and invertebrates. Zirartia agaatiar Emergent yes up to 1 ft. High. Food for birds. Prefers full sun. Wild Ria Table w schueder 730 PLANTING WILL BE SELECTED FROM PLANTS LISTED IN TABLE 2.2 ABOVE (SOURCE: STORMWATER BEST MANAGEMENT PRACTICES, NCDENR, APRIL 1999) BASED ON HYDROLOGICAL CONDITIONS AND AVAILABILITY. 725 �5 `-- \\ J' ^\ \• _ � ,_ 'l -�/ ' _-_�\-'/ -___ �• 1 1 I I I �rir x I Qty T" Q O / , J /' , ,1A _ - -♦ / 100, 100, Ne _ i \ \\ \`♦ , \ _ ' \ I lr - l I _i Z.1 ' I I 1 I IIII Q w� Q�```� ��• ''�' % '''' / '' '`�' ' /"' _ '�� - ' _ X k �C`\�, `\ \, 1 ' / / %i \r \` `\ \\ �` \ \\---- I! / `, ." `\ i i i i i + I+) \\ '� r\`O •- / /'' / ///�� - k�-` / k\ s 1 , 1 �4? \�\ .\ `� V '' Q ' '.moi /' / /' / \ �� x �'' k \ 1 k \ , / \ •- 73 _ / r I I 1 t f r\ 1 1 1 1 .[� j / / / / ' / ,' I k i �s ./ k .`a( ` I / -' 1 ) \X _ �k / J�' __.-_,�\ \ ` \ ♦\A,\ `\ \ , _ I __ _\ -_ 7 ------------- Jr ---- - - \`` _k 1 _ 1 '' k- _ . y, / / . \ \ \ \ I ' ^ ------------ T' O /r C / ' # • / ' _ k \k \ \_/ . / , '/,i�i�. , x\ k ' k ' Jr \ \`� �\ \ \ ` '/, ' ----------738 /' ' - �' /' 754' �`� / �a \ yy 1 / \ _ ' / ` \ ` , \ ' - ---------------- < --- --1 I I 1 I I / !/_ . \ / 1, I // / IAAA • a• ,Y. , , _ �• , , / k k\ \ \/\ / 1 1 \ 1 ./F / ( / / I / \ JC , \ . , i;L - — — _ "-------- -r' - -- ` 7 ! ll�J , , v 1 _742-_ \ 1 I I I 1 m. ..Y I / , / i% -- - _ /' _ k� ,'/1F \ // !,^ / $• ` / _ / L/' J I 1 k ``\ ` \ + - _-_- i / / , L •'k/ _ ll5 a _ I I!/` / i L \` / / \/ l \` \ 1 •� / .� , I / / // ere/ 'kms / / /- ,� k��`.\ k ` Il,j X `%� , -�/ \ /.744' .y' .y• ,�`, ! ! - _ _ / / // 1- ` `i '�f� \ ('�♦\ /� �/v I / �C,{k /`> + `� J( \ \ 1 1 I -- -- - ..\� �` �\ \ / I 1 1 I + \I , ; 1 '�'.-%�-'/ s• •� .v • y• '?C ,' \ \ \_ -00, '•li a., ! \ I / •1�• -_/ _ - -/ I'/� ' / ( /� ,l / �1 aC / �aC �' 7 /�/ ✓ �\'_\'J \ / \ / 1 j - _Li'L� \\ / / / �.1� uA` \ `` 1 I �• / —\ \`\ , \ ♦� �_~ _ ' l \ I i :-u•y•: .v. .i (�r � 1 , / // / k � � \/ \ \_ �(\ / ,C k� 748 w• .a•y�, «Jv,{W�rr1 ;w J / •lll lI ' ' .,// `\,t 1 ;11 1 1+ , ! , /' rn�,� - ' _ , /" ' �J^�, - - T � l__ 7_ _J ' /.Y/ _,�K l /'- �7 _l _�_/ l `l.�``\l� > l\l\l t •�(\ `�\�l`\ / l`'f � �\ �' % ' l �_/ - /k l �' l/ ll` / \ 1 / / \ �� I ,`'`! , \ \ `,h __ i ' '' J' ^754 --'"- / -- -- ------ 7 ----- T /k --------- 7 I11 I11 10e 11 / / 1 / X �V\ \a/�1v.� .v: y• .,v I/ - ''' - \ 1\ \ I I ' k- -� /,��- 768t'- k k\\ ,y /k •may-'� �' ,- O /'l j / ' \ l ` , , I r / // �. \ ` ` 1 1 / k k k • s, Y _ '' / l' r ! ,/ ' ` ` , \ , , --- 1 / r _-- k k k k k k k k /kX k Ooo o \----- 7420000 _ \ \ , \ \ \ + -. \ , \ _ \ ' k 0. , 7 \ I % ` \ / \ + V %u' 1Z -�- -'- --- � � -� -case ,_ - ; - �- \, 1 �• _ - .--_-_----�a' /t "�'\ ', --'_ ��', ------ `• \ _' �\ i1Z• CIO �..Cj N ACV C) I1110 91 Z 00 �Lo 00 752 _----------- Z ZC>toLr) COS U COc�eN �¢oioco N Wo�� _ / tV�yy C)= r) J `r' W � PI) ro co C�i = =1 I ------- ------\\\c7 -__ �/e/ '/ \`L.00e `I 1 '`` ' 1 y• ~ /'�` `•\ `\\\ -``\ \.� \\\I -\ `� \\," '+ r 1 -• �` ;.. �i -_' / /'- '. \ \ I ,, �' /,' / �' / `_�\\ ..� —. �. •y. `\\\ \ j' 1 j 1 1 ; 1, ; 1 ; ! o o° c ° ° po° 0 4 \ 1 1 1 `-- \\ J' ^\ \• _ � ,_ 'l -�/ ' _-_�\-'/ -___ �• 1 1 I I I �rir x I Qty T" Q O / , J /' , ,1A _ - -♦ / 100, 100, Ne _ i \ \\ \`♦ , \ _ ' \ I lr - l I _i Z.1 ' I I 1 I IIII Q w� Q�```� ��• ''�' % '''' / '' '`�' ' /"' _ '�� - ' _ X k �C`\�, `\ \, 1 ' / / %i \r \` `\ \\ �` \ \\---- I! / `, ." `\ i i i i i + I+) \\ '� r\`O •- / /'' / ///�� - k�-` / k\ s 1 , 1 �4? \�\ .\ `� V '' Q ' '.moi /' / /' / \ �� x �'' k \ 1 k \ , / \ •- 73 _ / r I I 1 t f r\ 1 1 1 1 .[� j / / / / ' / ,' I k i �s ./ k .`a( ` I / -' 1 ) \X _ �k / J�' __.-_,�\ \ ` \ ♦\A,\ `\ \ , _ I __ _\ -_ 7 ------------- Jr ---- - - \`` _k 1 _ 1 '' k- _ . y, / / . \ \ \ \ I ' ^ ------------ T' O /r C / ' # • / ' _ k \k \ \_/ . / , '/,i�i�. , x\ k ' k ' Jr \ \`� �\ \ \ ` '/, ' ----------738 /' ' - �' /' 754' �`� / �a \ yy 1 / \ _ ' / ` \ ` , \ ' - ---------------- < --- --1 I I 1 I I / !/_ . \ / 1, I // / IAAA • a• ,Y. , , _ �• , , / k k\ \ \/\ / 1 1 \ 1 ./F / ( / / I / \ JC , \ . , i;L - — — _ "-------- -r' - -- ` 7 ! ll�J , , v 1 _742-_ \ 1 I I I 1 m. ..Y I / , / i% -- - _ /' _ k� ,'/1F \ // !,^ / $• ` / _ / L/' J I 1 k ``\ ` \ + - _-_- i / / , L •'k/ _ ll5 a _ I I!/` / i L \` / / \/ l \` \ 1 •� / .� , I / / // ere/ 'kms / / /- ,� k��`.\ k ` Il,j X `%� , -�/ \ /.744' .y' .y• ,�`, ! ! - _ _ / / // 1- ` `i '�f� \ ('�♦\ /� �/v I / �C,{k /`> + `� J( \ \ 1 1 I -- -- - ..\� �` �\ \ / I 1 1 I + \I , ; 1 '�'.-%�-'/ s• •� .v • y• '?C ,' \ \ \_ -00, '•li a., ! \ I / •1�• -_/ _ - -/ I'/� ' / ( /� ,l / �1 aC / �aC �' 7 /�/ ✓ �\'_\'J \ / \ / 1 j - _Li'L� \\ / / / �.1� uA` \ `` 1 I �• / —\ \`\ , \ ♦� �_~ _ ' l \ I i :-u•y•: .v. .i (�r � 1 , / // / k � � \/ \ \_ �(\ / ,C k� 748 w• .a•y�, «Jv,{W�rr1 ;w J / •lll lI ' ' .,// `\,t 1 ;11 1 1+ , ! , /' rn�,� - ' _ , /" ' �J^�, - - T � l__ 7_ _J ' /.Y/ _,�K l /'- �7 _l _�_/ l `l.�``\l� > l\l\l t •�(\ `�\�l`\ / l`'f � �\ �' % ' l �_/ - /k l �' l/ ll` / \ 1 / / \ �� I ,`'`! , \ \ `,h __ i ' '' J' ^754 --'"- / -- -- ------ 7 ----- T /k --------- 7 I11 I11 10e 11 / / 1 / X �V\ \a/�1v.� .v: y• .,v I/ - ''' - \ 1\ \ I I ' k- -� /,��- 768t'- k k\\ ,y /k •may-'� �' ,- O /'l j / ' \ l ` , , I r / // �. \ ` ` 1 1 / k k k • s, Y _ '' / l' r ! ,/ ' ` ` , \ , , --- 1 / r _-- k k k k k k k k /kX k Ooo o \----- 7420000 _ \ \ , \ \ \ + -. \ , \ _ \ ' k 0. , 7 \ I % ` \ / \ + V %u' 1Z -�- -'- --- � � -� -case ,_ - ; - �- \, 1 �• _ - i 1 1 1 1 Sr \ l I , 1 , I File No. Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001 SEC2 XREF: DRAINAGE KLAN b I A 1 L/U6UUI bASL MO o°p to U In i1Z• CIO �..Cj N ACV C) x t `I C> 91 Z 00 �Lo 00 752 ¢Wain Z Z ZC>toLr) COS U COc�eN �¢oioco N Wo�� a 1K = 0000 Q, Z iCn tV�yy C)= r) J `r' W � PI) ro co C�i = =1 I ------- ------\\\c7 r� \ \ _ _ ---_ _/.ice - ...-___ ' ♦-.-_- _ \\ \,;Y �-_�_till— o o° c ° ° po° 0 i 1 1 1 1 Sr \ l I , 1 , I File No. Tax Map No. Job No. 03-001 Cadd Dwg. File: DRAINAGE/03001 SEC2 XREF: DRAINAGE KLAN b I A 1 L/U6UUI bASL PLAN VIEW SCALE: 1"=50' Use of Faistine Hydric Soil Soil from the existing wetland areas that have permitted for impacts will be stripped and stored as feasible for utilization in lining the proposed wetland site. Other topsoil adjacent to the wetlands may also be suitable. Using these =nWg soils should hasten the development of vegetated, cover and hydric soil cations. This is also an awella t use of an imiVortarmt natural resource. Many of the recommended planted species canw y midst in the vicinity of the arca to be utilized for this finction. The majority of the species in dw.wetlands imrcludc Obligate (OBL) and Facultative Wet (FACW) vallptanion. Herbaceous plant spedes preI include Sol (Juncus effusus), sedge (Carat spp.), Dude potato (Sagitaria latiifolia, Arrow arum (Peltandra virgin a), Common Three - Square (Scirpus pungens), Touch-me-not (impatiens capausis), Smartweed (Polygonum sPp-), and others. Supplm ental plantings will be selesdod from Table 11.2 in the Storm water Best Management Prances, NCD04k April, 1999 based on actual field conditions, if required. Being that the site is in *e vicinity of other wetlands and floodplain areas it is expected that the area will bent from the natural seed sources available. It is a gxcted that herbaceous and scrub/shrub wetland species will rapidly volunteer in the area. Event IM &kedak - i%r�u d Ngweal Same „ Coin A me sin Notes Rusbes/Sedm* Juncits etiusus Smooth Noodle Rush 2 yr. peat pot 3' O/C. Scup, asmericamuus Common Three Square 2 yr. peat pot 3' O/C. Acoria calamus Sweet Flag 2 yr. peat pot 3' O/C. Shallow Water Plants Peltmira virginica Arrow Arum 2 yr. peat pot 3' O/C. Sagitaria latifolia Dude Potato 2 yr. peat pot 3' OIC. Saumnms cemns Lizard's Tail 2 yr. peat pot 3' O/C. Nupbar luteum Spattemdoek 2 yr. peat pot 3' O/C. Planting shall be in naturalistic / random clumps to encourage diversity. Specific plant species, quantities, and size, which will be utilized for the mitigation sites will be dependent on availability, cost, gime of year in which planting occurs. Control structures such as sedimentation traps, siltation barriers, and/or at minimum silt fence will be utilized as necessary. Sesa&tg Sbeczficafion for Habaerons and Cover• G}Ion lit Welland ell 0it .Inca Tont 1- Wetland argils in term maril_v aabtrated sails orWt�t totit cggtonxl and brief immdation Dates IT= AMR Apnl 1- Jul. 15 Rded.Top Grass 7 lbs/aere Smartweed 20 lbs /acre Jul. 16 - Sept. 1 Temporary Crop Jap. Millet or Sorghum 20 Ibs /Acre (to be followed by permanent ruubd=) Sept 2 - Nov. 1 Smartweed 20 111 I=ee Red Top Grass 7lbs/acre Nov. 1- March 31 Temporary Crop 40 ft lacre What or Winter Rye (to be followed by permanent mmtmro) The following species may be snbsrittftd: - olden c onnata (Beggar's Tick) and other BideWs species - L== orywides (Rice Cutgraw) - Pawcam viratum (Switchgrax) - Peltandra virgiaica (Arr)w Arum) Seed'mae Instructions 1) Seed in the dry period 2) use of a filler, such as sand to dilute the seed to ensure uniform ground coverage when broadcasting 3) tree and shrub planting should be completed first before seeding 4) Pure live seed shall be specified and approved prior to planting. Herbaceous species may with a wetland seed mix which will result in a coverage of at least 100 stems per square meter upon germination. Substitutions may be permitted' with approval. Other native grasses or annuals may be selected. No fescue will be used in wetland areas. Annual grassers shall be utilized for stabilization on surrounding slopes within Mitigation Area rather than perennials to allow natural succession. If a 'perenniai is required for erosion control than a mixture shall be selected that allows natural volunteering to occur. co 2 F- O U U Z aLLJco¢ � U o J �N N CO X W Z Z 5 CL a �s =o CC s I� = I eco U c; CO)p ¢ Ina � UjLL �W LL CO3 ZZ EU W 4 JAZ 1 N � UJ � U 0 a Z ^ O U N v Iz ~ o� w J 's°VJ?�tn MO o°p to U In i1Z• CIO �..Cj N ACV C) x t `I C> 91 Z 00 �Lo 00 752 ¢Wain Z Z ZC>toLr) COS U COc�eN �¢oioco N Wo�� a 1K = 0000 Q, Z iCn tV�yy C)= r) J `r' W � PI) ro co C�i = =1 I o o° c ° ° po° 0 .01 PLAN VIEW SCALE: 1"=50' Use of Faistine Hydric Soil Soil from the existing wetland areas that have permitted for impacts will be stripped and stored as feasible for utilization in lining the proposed wetland site. Other topsoil adjacent to the wetlands may also be suitable. Using these =nWg soils should hasten the development of vegetated, cover and hydric soil cations. This is also an awella t use of an imiVortarmt natural resource. Many of the recommended planted species canw y midst in the vicinity of the arca to be utilized for this finction. The majority of the species in dw.wetlands imrcludc Obligate (OBL) and Facultative Wet (FACW) vallptanion. Herbaceous plant spedes preI include Sol (Juncus effusus), sedge (Carat spp.), Dude potato (Sagitaria latiifolia, Arrow arum (Peltandra virgin a), Common Three - Square (Scirpus pungens), Touch-me-not (impatiens capausis), Smartweed (Polygonum sPp-), and others. Supplm ental plantings will be selesdod from Table 11.2 in the Storm water Best Management Prances, NCD04k April, 1999 based on actual field conditions, if required. Being that the site is in *e vicinity of other wetlands and floodplain areas it is expected that the area will bent from the natural seed sources available. It is a gxcted that herbaceous and scrub/shrub wetland species will rapidly volunteer in the area. Event IM &kedak - i%r�u d Ngweal Same „ Coin A me sin Notes Rusbes/Sedm* Juncits etiusus Smooth Noodle Rush 2 yr. peat pot 3' O/C. Scup, asmericamuus Common Three Square 2 yr. peat pot 3' O/C. Acoria calamus Sweet Flag 2 yr. peat pot 3' O/C. Shallow Water Plants Peltmira virginica Arrow Arum 2 yr. peat pot 3' O/C. Sagitaria latifolia Dude Potato 2 yr. peat pot 3' OIC. Saumnms cemns Lizard's Tail 2 yr. peat pot 3' O/C. Nupbar luteum Spattemdoek 2 yr. peat pot 3' O/C. Planting shall be in naturalistic / random clumps to encourage diversity. Specific plant species, quantities, and size, which will be utilized for the mitigation sites will be dependent on availability, cost, gime of year in which planting occurs. Control structures such as sedimentation traps, siltation barriers, and/or at minimum silt fence will be utilized as necessary. Sesa&tg Sbeczficafion for Habaerons and Cover• G}Ion lit Welland ell 0it .Inca Tont 1- Wetland argils in term maril_v aabtrated sails orWt�t totit cggtonxl and brief immdation Dates IT= AMR Apnl 1- Jul. 15 Rded.Top Grass 7 lbs/aere Smartweed 20 lbs /acre Jul. 16 - Sept. 1 Temporary Crop Jap. Millet or Sorghum 20 Ibs /Acre (to be followed by permanent ruubd=) Sept 2 - Nov. 1 Smartweed 20 111 I=ee Red Top Grass 7lbs/acre Nov. 1- March 31 Temporary Crop 40 ft lacre What or Winter Rye (to be followed by permanent mmtmro) The following species may be snbsrittftd: - olden c onnata (Beggar's Tick) and other BideWs species - L== orywides (Rice Cutgraw) - Pawcam viratum (Switchgrax) - Peltandra virgiaica (Arr)w Arum) Seed'mae Instructions 1) Seed in the dry period 2) use of a filler, such as sand to dilute the seed to ensure uniform ground coverage when broadcasting 3) tree and shrub planting should be completed first before seeding 4) Pure live seed shall be specified and approved prior to planting. Herbaceous species may with a wetland seed mix which will result in a coverage of at least 100 stems per square meter upon germination. Substitutions may be permitted' with approval. Other native grasses or annuals may be selected. No fescue will be used in wetland areas. Annual grassers shall be utilized for stabilization on surrounding slopes within Mitigation Area rather than perennials to allow natural succession. If a 'perenniai is required for erosion control than a mixture shall be selected that allows natural volunteering to occur. co 2 F- O U U Z aLLJco¢ � U o J �N N CO X W Z Z 5 CL a �s =o CC s I� = I eco U c; CO)p ¢ Ina � UjLL �W LL CO3 ZZ EU W 4 JAZ 1 N � UJ � U 0 a Z ^ O U N v Iz ~ o� w J 's°VJ?�tn MO o°p to U In i1Z• CIO �..Cj N ACV C) x t `I C> 91 Z 00 �Lo 00 E 0CL es.l 0 R O O O � O cc) 500 Z � 5o F- M N N C7 ¢ O U� U �� LL� X O O U=° m Z='IS � W tn Q F-• ZZ(M\fM\ �— V NIiNIn _ �_ Q. o� � = oo Cq,C14 F o �m 4 CIO # a Z J a LV O Q W a m,J W = Z 0 O O > i z t� LAJ = �' Z V !- W z I- a u. LV O O Mj V W F- V Q Z Z WW Z J !C V W W SHEET:D19 OF D20 00 N ^ O o U N ACV C) x t `I C> 91 Z 00 �Lo 00 MIS �¢ ¢Wain Z Z ZC>toLr) COS U COc�eN �¢oioco N Wo�� a 1K = 0000 Q, Z iCn tV�yy C)= r) J `r' W � PI) ro co C�i = =1 O O O � O cc) 500 Z � 5o F- M N N C7 ¢ O U� U �� LL� X O O U=° m Z='IS � W tn Q F-• ZZ(M\fM\ �— V NIiNIn _ �_ Q. o� � = oo Cq,C14 F o �m 4 CIO # a Z J a LV O Q W a m,J W = Z 0 O O > i z t� LAJ = �' Z V !- W z I- a u. LV O O Mj V W F- V Q Z Z WW Z J !C V W W SHEET:D19 OF D20 1. Enter Site Data Here 2. Assign Project Areas Here DEVELOPMENT PERFORMANCE ANALYSIS ~ ~ 0 ated with a specific set of BMPs Walter L. Philli s, Inc. U U P "Site Data" and "BMPs" worksheets require user inputs. Assign project area to specific land uses in drainage areas (DA) associated with a spe assigned" category equal 0. Northlake Villa e U " r MP" re uires user in ut if the site has a BMP not listed on the "BMPs" sheet Hint: Assign land area to the Drainage Areas until all entries in the "Unassigned" cote+, Use B g = z U r ;~-#3il~le ~ ~ indicate user input fields. „ Proposed, Land Usel Cover Data by DA Model resuits are summarized in the Model Output worksheet. Project Unassigned Drains a Art Y Draina a Areas DA associated with BMP sets. Land Use Summary : ; , Areas ftz Area ftz DA1 t W DA1 DAZ DA3 DA4 DA5 DA6 ~ ;>~pnerai #pf~rmattoln Pervious Areas Total Site Area (acres) 125.72 a . , - Pre-development impervious percentage 1.0% ~ U o . f4 m Wit, , . I p .x :r ~ Row Cro 0 0 - • - Post-develo ment im ervious rcenta a 75A% ~ ~p P P Pe g 0 V' ~:~hme~f ~ ect: - ,4 ~ pa~ure 0 0 _ - ~ Z O " 360 725 0 ~ , ~ >Forest , .;r.#~fomeson tic3 , , , ~ 0 36tl N ,7~ Annual Hydrology Summary N ti;-~ M -gimme l mt~ r ~ y„ < ~ z ~ a 47,659 nt>?~weit~d. refs weaand , . L~ ' ~ 4T659'~' Existing Design Design It>• N s _ r. ;iY, 7~ t! SJ . , . p, . , . 4 . , , GaWn' 24,373: 0 :59,874 v~ Landuse without BMPs with BMPs tZ 5tl. ~4 . ~ ; W Z S cu 5 4. 363 9 =DeVebpiili~lnt : iE~ ~e~ ,j ~ Annual Surtace Runoff (inchestyr) 2.32 28.84 20.21 - Z BMP nfi orations are bein tested Im rvious Areas Use Scenano Name when multiple co g g Annual Infiltration (inchestyr) 10.66 2.28 10.90 ~ S for a given project. Save each scenario as a separate file. Residential 8 i.i ht Industria! ROOftio 0 0 .y 1. .e ~-year, 24•hour Storm Event Runoff Volume Summary = M olo is Grou s P+arcent of Site At"ea ' = Dfir~ra & Par(d Lots 0 0 ; «.,;~~I Hydr g p ( 1 . . - - Site located in a zone other than Rural or Transitional tone ¦ N U o _ ~ ~ s o0 N _ _ O ~ o (~t~M`I~i ua Area 0 0 Gtau A 10. _ Storm Runoff Volume Storm Event Runoff Volume acre-ft 2 ! ~0D Grou . ; - ~s_ ~F 3ldewalk .0 0 12.00 U N> : ~ • ~r, ' Commercial & Hea Mdustrial . ~ ~ 10.00 Exlshng Landuse 0.582 ~ . . 'i~aoffo 960,455 0 'ice' 75' ~3 ~ 'tl93 Desi n without BMPs 10.006 N J M a 75 131,7'73, 398,714 ,:~9tl`, 8.00 g O $ ~ Q ^ o Check on Soll Group Sums Totals OK Pitrkin Lbt 2,847187 0 ::320' ; 2# , 32tl2~ 2d7 1' ;T78~ `:838,189. ~ 6.00 _ Ij„ v 0 0 . other hn Ious Area Dl~$igo5~rm~aT ` Cu ~ On-Site Store a and Tar et acre-ft , a.oo W Road. 236,070 0 ~ Oft; Otl ,'t$04tl ~fi t tl2 . ~ W ,r~ ~ , ' ~ f Y 89 716 0 ~~3 0'f4. ;~f . , „ , ~ , s ~ , 5ldewalk , F, r ~r r, as°019. ' 48 380 t ' 2.00 1-year, 24-hour BMP Storage 14.21 to Z ~1'30'14 . 3'..., : 0 DC 9.424 F Oft ~ , ~ Storm Water Mana ement Facilities , o.oo Target Storage W ~ Meets Goal? Yes W Q pan and 139,940 0 ; 6;797'' = t1lIIV8tl 6'797 ' 22'8Q5 1:: Existing Design 1 jp _ 1 Z Y t Ail'.other BMPs' ex ' tForested Buffer . 3 238 0 i~4;533 Areas assigned to this table must sum to the total development site area. X4;533 't~~'~ts ; p C~ ~ N Z Q w" m ns unmans ed herbaceous cover without livestock. Total Area 5,436,363 0 582,926 49 Pasture has livestock, while Meado ea g 582 926 499198 2607 842 1786 397 Annum Pollutant Load Summary W o. " • ' a e Area DA assi nments match Pro osed Land Use. Driveways and Parking Lots tnciude curb and gutter. Proposed Drain g ( ) g p Id Land Use. Existln Design Design 0 J M g U ~ n O "Rooftops" include canopies. Landuse without BMPs with BMPs Z O ~ ~ U N o 3. Assign BMPs Here Sediment (tontyr) 8.27 97.94 7.05 ~ ' a. Click on a box to associate a BMP with a specific DA. BMPs should serve the er ald serve the entire DA. Total Phosphorus (Iblyr) 8.4 157.6 39.7 a Total Nitrogen (Iblyr) 91 3480 1517 - - b. Enter storage volume cif applicable) of BMP inacre-ft. 'tand tJselCo 9 Fecal Coliform (count x 10 lyr) 631 5575 1220 ~ • and Use - I~ .-.--------I I d Use p ed Exis~d as _ BMPs A lied to DA DA1 ~ v ~~~.~Y,4 , r, Ares ~ 7,. h of Stte • - , 81b DA1 DA2 DA3 DA4 Sediment Load ~ 1 Phosphorus Load Nitrogen Load Fecal Coliform Load K~""` 120.00 ~ I 180.0 ~ 4000 6000 Y~~~Ond ~ y,,tf~ 3 ,Ur ~ Row:c ~ o:o~~ ~ o. ,.7~ to K w, I ! ````,,~pnlplllllp?prrryrrrri ~,r ~ s''~ ~ 160.0 3500 - //i - / t ~ W ..,R,r y~ay D' DeEeelnttort RAsture , 0 ,I~,~v 0000 , i 5000 \ . .w / 1 / I \ 140.0 i \ oo ~ 0 0 r' 30 0 ` o eY~y . . , X Fora6t. r;,~~- ~ - ,,,:y . Ow,' m , ~ ~ _ ~ 4000 ~ y 00 i x 80.00 120.0 - 2500 ° vo° ~ o h . Sand FNfe~. ~r,, 1Netlan m , _ I 100.0 ~Do °etn; ~ ~ 60.00 - - i ~ 2000 I 3000 ?~o ti.g„ o r' s. 3 I 80.0 ~ = Q °y ~ °a ~ 0. ',1,, n~Garoen ~ Meadow ~ ~ A u F i;, ~ , xr ~t 4' r ~ . I 1500 U $ OD ~ ~ _ ~ r ~ M ` 40.00 60.0 ~ 2000 o1J (tl~- u w . r,.'., e. Q.Q7ti a ti~. /?~,,~~.y . w'_ -..w• 1000 0 ~,F~:fi a,~u ; ~ r. ; 40.0 ye ~o° !m loos Area . k 4 ` ' frtfittratio~i'F,reirch ' F~ ~ 1000 ° F. ` 20.00 , r e ° s ~ 20.0 500 ~ ; o 00 - Residential & U ht Industrial l ~ ~ _ ~ • ` ` . .M„ ~ , . ` r`' 0.0 ~ D errdefint~d'HMP"' Se uential with ether ass nedBMPs ~ r ti , , 1 L1 ftpp~ 1. . st rY, _i _ 4"~?e-~ 0.00 0.0 i J' a f!e , ForeSted Buffer '.f _ r?rprrumm~n~rti~ yy ,3. tea ~ ~ • r: " Enter Buffer Width for each DA wiftt ForeFted Suffer (feet): T _ r . 1~•:', . w. • ~ Developed Area Sediment Target Summary r yS • ,perrrent of D ent zont3 - ~t L~.~~ .y 1 t Y ~ ~ y£ 1 ,Y 1 ./.ALn (.4 J. `.Wa ~x~ ; . , f N Storage volume for 1 yr; ?R hr stone acre-#t). ~ 11 ~ N, . ~ ~ Comparison to Target Sediment Loading and Target (tonlyr) o f.• mme?cial d ea ~ 1~ H lndustrra ~ - i*o a . N°•:.. { ' °,s ~ ~ ~ ~ hx ; 7~~ Notes: Grass channels do not receive removal credit when used in combination with water quality dry swales, 120.00 quality dry swales. " ; ~ M ;M~ Forested Buffers cannot be used with Wet Ponds, Dry Detention Basins, or Stormwater Wetlands in the ater Wetlands in the same drainage area. 100.00 Design without BMPs 97.32 i ~.~,:1. =Lf?~ 0,094 1 s ~j~~n k. ~ i. ;a 4% . rvious Area . w Design with BMPs 6.66 80.00 Target Loading 14.60 ~ :•4:~~' "~a,na~ a.a~ ''i '~na#l:: , 60.00 Meets Goal? Yes 4.tYY. ,1:. w . Storm Water Mana ement Facilities ' ~~X-'' ; ~ . ao.oo Additional sediment from ~ ~ ~PondlWetlandn.,f~ , 20.00 _ undeveloped areas removed MP F °~'Euffer ,',F ~ 0.0% ~ ~0.8°k ~~Ail:Otner B S .oft . _ _ , . ~ BMP Performance , ~ ~ 10a~.0°. r ~ ~ '190,1. 0.00 i by BMPs (for reference only); 0.23 ~ Site Tata1~,, , ~ 5,476,'~~;~ . , i , 6~~,. ~3 No BMPs Wlth BMPs Target j 1 ~ ` ~ Net Reductions aA1 - - ; ~btalSite trripervtcus,Co?er : 715,4./e Dal Dal Da3 Da4 f ous Cover.w thin, to Aree ~ ~ ; . 6'i.a'~ ~foar converted to infikration b B .MPs _ 35.4°/. ' mpt~,ri Z . , ped . 35,4% Ua%. ; 35,D'h 5.5%. Y fit>MItrO n 71.2% y a BMPs Meet Sediment Load Reduction and Runoff Control Targets 71.2./° ':33•tl% 71.2%, 19.1% z Pervious areas are assumed to be 1% impervious ` h ru . i38,2°/. z „ 't~cttat P,hos o s f ~~ah 88.2%' 23.7 88.2°/e ° • Developed Area refers to that portion of the project not covered by Row Crops, Pasture, Forest, or Meadow ' ~ }':~YS 91i'i1:70 n.~l .0°k 98.1 °Yo 37.1o/a "Target addresses loading from developed portion of site. Developed portion is lawn, BMP area, and impervious area. d 98,1:°le $ ° ° Undeveloped portion is forest, meadow, wetland, pasture, and row aop land uses. ~ 97.0°~ ,~QlifQrRt + Check on New Land Use/Cover 97A% 70A°/a 97.0% 2,8'k W 0 Existin Land Use Data OK g pr~aaedto Modei ~y tit ~u~? t 0 z Proposed Land Use Data OK ~~~,~oBMPs'~ Q U O M QO O Q O ~ N U ° x Z W ~ M ////r/>//~. V ~ N O N.I O I-~ ~ ~ ~ ~ X Q ////iI/////' r1~Y ~ ~3 a Z Z wo ~ Z W W ~ O a ~ if {,i1 _ ' W l~zooap ~QcOM IIrr1~00L ":iii) " ~ -tn ~ ~ ~ f0 t0 "rrnrii~.': asi~••• U aWOO~ Z ZOO tp tC) .'unru rrrrrrrrl,": ~ W Ou7 V7 O ~ NIA .rrrr~rrrrrrrrrr,: ~ ZZ I I O~ I I ~:ii rrrili/ v Viii A...,•..'. W x00000 U ~UNN •rrrnrrl}~,.IVrnrrrrrn V ~ Z -M Ih • grru)rrf//7Lrrrrurrl., W . r~rrrrrnurrnrurn. ~OCO fO ~ ~ J~~~ ~ •rrnrrrrr urrrrNf„ 1//r////r//////b. . ~ IiNMM V OZr'1M ••rrurrrrrruru Li! rrrrrrrurrr~(rrrr). ~f` ~ NWOO ~~iiiiiiiil~rrrrriii, W O O ^ O M M ~ .rrurrrrJllMl~irrrn'. ~ ~-n..~ ty/ w ~ ' ~ 1 • •irrrrr~ ~~•ilirN? ~ rrrrr~{rrrn . + M r f~•~rrrrrrrrrrr:•; . i / . .ir~rri irrr • frrr rui!~• \ >rrrrrrn rr . / ~ ,•(irsc,p rr•~• r~~iri.. ~ rl:.. ~ ~ ~ / ~ ~ ~ ~ ~ I \ FgEaAY o ~ ~ M / ~ t-M {_-O ' I ~/ll C/ \ -Z ~ p Z Q \ ~ en (n ~C~ O ~ U \ ~ Z ~ W U X + ~ ~ T ~J LL ON l ,y` ~',~t0 C~'JOtD U O o~ m O c°OD r T+ \ ~ ~ I I =W JO I I Q ~VL1 OF-MM ~ ~wt~~ i I I~ ZZI~I~ i~ 0 gI.LNN ~ I 200 ~.v. W W p~~.-. ~ t2 ~ oQ~~ oo~~ \ I ~ 7 ~ ML~~,~ O Nm:VN '+li t ~ I 1. I f v V C~y . Arm II 11 11 CL Lu 0 II r fl 1 1 0 C) 11, 1 1. W II I, J H H H J I W% V \ i )OW \ V z ui P. 0 ~d z \ M \ J 1 I v 0 Z W LU z J ' C I W DRAINAGE AREA MAP FOR SITE EVALUATION LUATION TOOL SCALE: 1"=200' SHEETT20 OF D20 File No. Tax Map No. Job No. 03-001 Co.dd Dwg, File, DRAINAGE/03001SET XREF: DRAINAGE PLAN STATE/03001BASE