20081031 Ver 1_Site Plan_20080627

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' / / I I ~ / ~ C CATIONS FOR-AREA DRAINING TO DETENTION BASIN N0.1: - ~ - p ~ STORM DRAINAGE CAL U '
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p~ / ~til ~ I I 1 / 1 pRAINAGE AREATO BASIN - 7.0 ACRES ,
f I ~ ! / / ONAL C - 0.51 i! I I 1 ! _ i ~ •7 a~ COMPOSITE RATI • .
1 1 17 _ ~ .0 -306 = 1.0 INIHR ,f ; / I , ~ INTENSITY (1.O INIHR STORM) Il i / ` 1 , ti /
/ / ~ / / , / , , /
i _ - S 3.6 CF R - R 1 INIH , / ~ , / / / q~ ~ / DISCHARGE (Q FO .0 ) / I ; i / / i -90E
;i i I i _ 300 I ' ''j~~ j o ! !J~ !,;!~w .I _ ~ ~ ~~z- ~ . ?
' / / $~E _ / FLOW INTO BASIN BASED ON ~ i / ' m ; 1.0 INIHR INTENSITY - 3.6 CFS ~ ~ ~ ! ~ ! 1, ,~I ~t f ___-r-- ;r~ /
/ / / ~ ~ / ~ FLOW OUT OF BASIN AT 1,0 INIHR
W ~ / ',r 9~'/ N / INFLOW TO BASIN (BASED ON ~1---_.._
/ Li. ! 'r"' RESULTS OF ROUTING CALCS) = 0.7 CFS
i ~ % o~ / / ` / ~ OUT PIPE DIAMETER = 15" RCP
~ ii ~ / ~ o ~ LET c--.__. \ ~ i I r _ / = 4" DIAMETER ORIFICE ~ ~
c o ; ORIFICE DIAMETER it ri Q 10 INIHR FLOW TO \ r-- ~
w _ ' I ~ ' ~ , PREFORMED SCOUR HOLE 0:7 CFS 1
l / , ~ ~
~ , , ~ / - car - ~ - , I ,r c~ ~ / / o ~ °30 ~ ' ; Q10 DISCHARGE TO PREFORMED \ / / , / ~o ~
, ~ ; / , ~ , SCOUR HOLE - 2.9 CFS 98 . ,
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UUUUVVIN UKUSbINU SUbU1VMIUN
i PREFORMED SCOUR HOLE FOR., u
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DETENTION BASIN NO.1 A~' o
Ii SCALE: 1" = 54' ®
0 8 1 0-3 1 SHEET PSH-1

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ALL CONSTRUCTION SHALL B _ ~ DANCE WITH CITY OF DURHAM AND NCDOT STANDARDS Spl TEMPORARY BENCHMARK: BNK CONTNQL IKON PIPE ~ BARDS, SPECIFICATIONS AND DETAILS PIN: 0835-04-52-1161 AND 0635-04-553-4274
~ m N - B52,BB6.6376 ' ' E - 2,036,123:2772 r ~ ~ ~ a
EL - 349:3Y SEE TRASH RACK ~ f' \ gk~ ,'ft } ~ti,
ISEE DETAIL THIS SHEETI
I r' .`Y
TOP OF BERM ELEV. 299.50'- ~ PIPE 1~ ~ ~4 ~ Y>~
,d=15~ UFt 18''} {STIp~RD~:
~ BOUYANCY CALCULATIONS FOR. RISERIBARREL
Gaodwin Crossing • Detention Basin No.1 e ii 4 „ I
1 ~ 4.".FAIRCLOTH- K MMER. 24 RCP TO ENOWALL RCP TO ENOWALL ~ ,,s~` ,,k~,
' 95X COMPACTED GERM a OR EQUAL;_FATiACHED TO RISerlnSld(: Diameter ft : 5.0 li ~ ORIFICE-0URdNO CONSTRUCT[(lN. i y ~ ~ 297.00. SKIMMER:TO BE REMOVED: AFLER RI5erWall Tf11CkIleSS In : S
• a 5' PRECAST SITE STABILIZED AND REMOVAL ~ t i
D r- RHA N Pond. Bottom Elevation ft : 291.00 APPROVE B OU M COU TY ' MAN~~E SECTION 134.00 LF EROSIt}N CONTROL INSPECTOR) RlserCfestEleVatlOn ft:. 297.00 C ~,lNI=4Ft£Elvl"MkTTlNG: ~ saute Pf3EFQRtviED ~ ~ ' -
24" RCP DURHAM STANDARD PLASTIC a e l.o4y si Ps a +5° PAC( c. Densi of Riser Matl Ib! 150.00 sr.~.~ c~oLl ~~s~}
E ~ . ~ o ALIGN W[TH T ASH ACK T, HATCH, pipe Inside Diameter (in): 24 . IRlP~AE' ftd ~~N ~ ~ s~ 'i~TH'JEG~f'A'fiC1~1 h
Q Pi a WaIFThickness in 2.5 i CONSTRUCTED WEIR 3HD}NNP43l~i~ARI't1~ ''~t.~" ~ ~,~,r' piTt~dS'T~.it1: / ~ ~ - ~ WEIR U
} e 2° DIA ORIFICE Len hofPi EX Sed ft: 12.00 roP = 2B7.9o ' ~
(s• TYP. y' ~ (INV = 292.50' i Densi H2O IbI : 62.40 2 15":RCP TO PREFORMED ~ ~ n
~ ' j <; ORIFICE ACLETHIS H 1 VOIUme N20 DIS laced b Rlser Cf : 160.35 SCOUR HOLE ~ ~ a
' • ' ~ Wei ht H2O Dis laced b Riser Ib : 10005.97 4' -o" D 1 A MH [NV =.288,50,.... ~ . , { N~
~ , ~ ~ ' ' ' . " ' ; ~ 4^ IA RIF E Volume H2O Dis'Iaced b Pi Cf : 55.04 SPUTTER BOX < • BAL1:A'ST• ( ORIFICE PLATE FQR 1.0 (N/HR STORM ~ _ ` 1 TO PREFORMED SCOUR HOLE
• fINV = 291.00 I fSEE NOTE 1J eo1lcREtE . . ~ Wel ht H2O Displaced b ,Plpe,(Ib): 3434.70 Y ~ ~ y TOP = 292:00 A (SEF DETAIL THIS SHEETI W ~ O p
a' • a • ~,a • ~ a . ~,a ,a . ~ < ~ , Total U' {ift Force lb : 13440.68 INVERT = zez.la L 10 T 011.0 ! N/HR) = 0.7 CFS F1guY8 $-5 ~ W ~ Z y `i ORIFICE 0[A = 9"
- ~ ' DURHAM: STANDARD PLASTIC k 5 u, ,t Wei ht Of;RISeC Ib : 6381.36 ~ ~ ORIFICE INVEST = 2a7,,D Preformed scour hole crass section (NCU~T 2006) W "W o
STEPS ON THE OUTSIDE DF ~ F Wei ht of Pi a Ib : 2601.63 Q10 WATER LEVEL = 289, 39 ~ ~ ~ 0 a -010 TO PREFORMED SCOUR HOLE = 2.9 CFS W ~ 0 W
i' MANHOLE @ 15' SPACING, ~ 6".DEEP WASHED ONE ALIGN W1rH TRasH RACK Pi (Riser Downward Force Ib : 8982:99 zw
HATCH, 24" RCP FROM DETENTION. ~ ~ ~ ~ ~ ~ 3 BA$IN N0.1 ~Lh,~?~ t ~ J e. o~ ~
NOTES UTLET STRl1CTURE DETAIL 1. RISER STRUCTURE SECTION _SHALL Ballast Concrete: !t!1STl~LL L~'~I: W ~ N ~
BE STRAPPED TOGETHER WITH MInIn1UI11 FaCtOr Of Safe :....1.25 o NOT TO SCALE STAINLESS STEEL STRAPS;
' 2. RiSERiBARREL SHALL 9E GASKETTED R wired ballast thickness in : - 31:85 NorES: DEPTH t3F SCR I-K)I.~ ~ ~ 0 OF BALLAST CONCRETE IN BASE AF SPLCTTER BDX. ~ w ~ N °o ~
- TIONS JOINT PIPE AND EACH JOINT SHALL ProVlded BallastTh~C e ~ 3 1. INSTALL 2'- 0" OF BALLAST f ~ ~ ~ Q 100 WATERLEVEL BASED ON STARTING. ROUTING CALCULA I kn SS In . 2 ' ' ~ WITH WATERLEVEL AT TOP OF RISER ANI) ORIFICE BLOCKED, BE WRAPPED WITH A DOUBLE LAYER
Total Downward :Force Ib 16836.97 J, OF NON-WOVEN FILTER FABRIC. - _ ~ a t~iUc;Ak. ~ o z
I w Provided Factor Of Safe : 1.25 S P A T T E R I TTER BOX DETA I 1. , ~ pz oo W NTS X~ `w~~
' ~ ~ o[ ~Q
NOTES: w F- LINED ~ I~S!{~I~
a , ~t4 A R A L BE R ~ o; ALL REB R SHAL EB ~ht~Thi T~"E~ ~ I:iLT~ PA" ~~d1f4.1`'f~Jt~, _ ~ I W ~
.RADIUS TD Mi o ~ ci ALL REBAR AND ANGLES SHALL BE GALVANIZED WITH A BITUMINOUS COATING. INSIDE RADtI RADIUS TD MATCH ' ~ ~ .r ~ V ..:INSIDE RADIUS OF o~'TI'~ CAF ~ ~ ~ a ~ z ~
o SPUTTER BO) • ALL POINTS AT WHICH TWO SEPERATE PIECES OF REBAR COME TOGETHER SPLITTER BOX... ~ ~ = w s ~
' SHALL BE WELDED. TNE,ANGLES SHALL ;BE WELDED TO THE ASSEMBLY. AT I ~ TOP. VIEW
_ LOCATIONS SHOWN AND'SHALL REST bIRECTEY ATOP THE RISER. '~1~TH- 6=4OFT t~Q o~~_
' THE HATCH SHALL LINE t1P DIRECTLY ABOVE STEPS WHICH SHALL BE INSTALLED ' ON THE INSIDE OF THE. RISER. o 0 1/4" TH1C ~B) W=4:OFT HIV o~~~ ' 1/4" THICKIORIFICE
a VARIES DEPENDING ON o MANHOLE WALL THICKNESS: PCATE C24 PLATE [24" X 24"1 I ' D ~J I [ [ I ~ m
THE HATCH SHALL BE, SECURED WITH A CHAIN AND.A LOCK. THE KEY SHALL 9" DIA ORIFICE BOLT TO S BE HELD IN POSSESSION OF THE PARTY RESPONSIBLE FOR MAINTENANCE OF INV = 287.10 BOX Wi 3- BDLT TO SPL ITTER SCOUR f-I O L G D E T A L L
I' THE POND. STAINLESS ACCESS HATCH BOx W/ 3-8" D[A ~ NT5 ~ STAINLESS STEEL NCDOT CLASS B RIP AAP
FABRICATED HINGES o o BOLTS: NU BOLTS. NUTS AND i ~ i r (O50 = 6") 22" DEEP N
i 5' I,D• PRECAST WASHERS,. R 3.50 FRONT VIEW MANHOLE ' WASHERS, (4 TOiAL1 I 1+ W/ OEOTEXTILE FABRIC BASE
t I, ; . (MEASURED FROM. it i ~ = 12.0' ~
2" X 2" X 0.25" NOTE.' C LATE DETAIL R 2. $ , ORIFI E P m ANGLES,IYP{4)' 0 • " REFER TO SHT C5.3 FOR ORM EMBANKMENT NTS r Q 1TE DETAIL , l t , ,5 ~ , r U
m 2 X 2 X 0.25" ANGLE CONSTRUCTION STANDARDS AND THE TESTING, , ~ rl ~ ~
' ° R~ OBSERVATION AND CERTIFICATION REQUIRED ' ~ ~ F OODWAY}FRINGE} ` ~ r r ~ ~
r .s ` ` ~ o 0 FOR DETENTION BASIN CONSTRUCTION. ~ ~ ~ y ~
~ ANCHOR TRASH RACK TO MANHOLE WALL WITH FOUR _t o ~ ~ , ~ e ~ , } S 1 ~ W d
~ 'SD EQUALLY SPACED GALVINIlED STEEL CLAMPS CLAMPS s " ~ o SHAD: BE ATTACHED T4 1HE MANHOLE RISER BY 2 X f t I ` r'
~ 0.5" CONCRETE ANCHOR BOLTS• ~ ~ . \ ~ J ~j~ 28.00 LF 24"FRCP Q 1 57.~r~ \ ~I n~ ~ 1 1! ~ f_ \ Z ~ ~
~ 10° TYP. E T(~ASH RACK SECURING....-
L ~ ~ ~ o ~ ~ ~ ~ ; ~ '\~t; NV OUT = 286.8 ~ t ~ j t I ~ ~
SH RACK DETAIL TRA \ t i NCDOT HEADWALLV j - z Q ~
° ~ / i _q \ c ~ I r tSEE SHT; C5.7 ~ ~ ~ r Q ~ ` t 1 i tl FOR DETAIL51 ` ~ p
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m i „ y 3X3 X& ~ \ ~ t ~
v CONCRETE ~ PAD AT BASE \ \ ` i t PRE OAI+~O SCOUR HOLE. r ~ h `\a` ` \I ` ~ ~ 0[1.0. IN/ HR = 0.7 CFS ~ ~ z ~ ~ ` i
° 4" DIA -0RIF1CE D OF MANHOLE fINV= 291.00') ~ , ` \;i ~ 1 Ot = 1.2 CFS \ } l
v (CENTERED t` / ~ ly 1 'I 1 ~ X010 = 2:9 CFS ~ N m ` ~ { \ ~ ~ X tSEE DETAIL THIS SHTI \ 0 I
c ON ORIFICE} : d ~ ,
~ 4000PSI MGNOLITWIC CONCRETE CRADLE: UNDER FULL LENGTH OF PIPE. CONCRETE 5'-0" _MH 1. ,G ~ •L, It ~ lj 11 ' ~ 18.00 LF 15" CP m 1.1ty
. D 2` SHALL BE 2-2.5` SLUMP.. CERTIFICATION / ` ~ ~ 1 11 `r ~ ) t 1t j i 1 ~ INV !N = 287. PO ~ ~ p \d t 1, ~~4 1 II 1 , `INV OUT = 286.~(J 1 I 1 I I} t
~ 2 NEEHAH R-7512-81 CAST IRON o THAT CONCRETE MEETS THESE PIPE .SCREEN FOR 12" PIPE 0 24 , V , O .
SPECIFICATION S_SWALL BE PRO IDED T ANCHaR To coNCRErE PAo 16 , „ , . RCP v • } VARIABLE 1 I 1 ;1 h• 1' t 1 t t %SPL[TER-:.BOX (SEE`~~ Q DRAINAGE 11 1 1 I 1 `I `I 1, \ .DETAIL THIS SHT1 ~ ~ ~ ~ ~ ~ m
o ~ ~ a ' " ~ THE .OWNER, PLACE UNDER PIPE WITH.. usiNG STAINLESS STEEL BOLTS, a a'n as . ; v a ` : ° : UIPMENT AND :VIBRATE Nurs WiWasHERS. (4 TOTAL)
rL ~ ~ ~a'. 4 , a HAND EO , o _ ~ a.o INTERNALLY FOR CONSOLIDATION FINISH i EASE6~'NT 1 `I t I t 1` 11 t t' TOP = 292.00 ` W FOR .BASIN 1 1; ~ tl t l' ~ I `I l ~ I`\ 1~ fNV = 287.10. - ~f a b ,1 t ;1 1 t ; t ~ ~ ~ ~ it ~ 1 ~ ~ N ~ Q25 WATERLEVEL IN ~ p Z M
, ~ a \ 'I ~ . a • u , ~a ' " 4' , a a ' n a SHALL BE 'ROUGH' . _FLOWABLE FILLS. o ~ , a ' ~ ~ , a . , o , a. - ES, OR OR GELS ARE NOT ' ~
~ w ~ ~ , e'< ~ a , • ~ SLURRI ~ ` ~ 1 j/ ` ' ~ \ - FEMA FLOODPLAfN =287.0'+ 0 a 1 1 1 1 1 1 `t1 + ~
~ - o - ~ ' ; PERMITTED. ORIFICE. SCREEN DETALL ~ ~ - - a n z .'t c e a ~ a NTS f ~ ~ t
a ~ ~ ~ ~ ~ ~ ' a 1 1 1 t ~ } } } t t ~ t o 1,
? F 1i Q ~ : ~ ~ ~ ~ ~ ,~1 \ 1} 13d 00~E.F 2d" R ~ ~;04% It ` t 1 ` ly tjl 1 ~ ti ~ ~ ~ ~ ~ ~ ~ ~ ~ `m0 LV V
o CITY OF DURHAM ~ - - ~ N B-B ~'i T E ~ ~ , , tlNVedN X288:50 1 t Iti tt ' 'I 1 t\ ;1` o ~ ~ W `l1s , ` ~ '~NV d~IT ~;,287:~10 t} •t ~ t `I t} ~ 1 }I `t `~t ~ ~ ~ ~ ~ ~ ~ ~
1 ~ PUBLLC;WORKS DEPARTMENT s ~ Z L -="APPROVED ~ ~
1 L \ r N > t ~ 1 I4 t ~ 1} } } ` t} 1} I, }ti tl\>,`\~ ~ ~ ~ TL~AND~ ~ ~
m ~ DETENTION BASIN N0.1 { T o N ER NG DATE ~ E LINE I ~ . ~ , 1 } t \ ISTOR'WATE 't} X } 1 ~ 1} t` 1 } 1 t~}I 1 \ Z
PRE-SETTLED DAM HEIGHT 29950 - 289.00 DATE ` ~ 1 1 ~ 1 ~ MP E SM ! c ~ ,1 1~ 11 ~ 11 1 ;i} ` \ ~ ~ ~ ~ ~ ~
N 10,5 FEET STORM WATER ~ ~ ~ ' c ANTICIPATED SETTLEMENT TRANSPORTATION DATE ~ 1 ~ } } t 1 'I Mti ~ ~ } } 1 ti,~ `.1 1 1} 13 1 \ \I ~ ~ ~ ~ ~ TR PROT _T[DN
~ ~ (ASSUMING 5.0% SETTLEMENT) U0.5 FEETI(0.05) 1 0,53 FEET DATE 1~ 1 , t ' 1 t ` ~t t ~ 1 FENCING d LIMITS
SETTLED TOP OF DAM 299.50 - 0.53 DATE ~ ~ } 298,97 FEET 11 } VS 1 t t ~ t, t} 11 ~ t 1 ~ \ 11 ~ OF DISTURBANCE (TYP) 2
L SETTLED DAM HEIGHT 298,97 - 289,00 ~ ~
• 9.97 FEET (CLASS C DAM) ~ ti 0100 FREEBOARD - 298.97 - 297,78. ~ ~ I 1 t 1 1,.~~ ~
~ EMBANKMENT 1,19 FEET ) 1.0 FEET OKAY 1 I 4 1} It I ` ~ tl 1} 1 t`, ; ~ , o A~tMO~TE~L:ARMORLOC SYSTEM
m (SEE .COMPACT ION NOTES `"I , ° -0N SHT C5.31 , ` } 1 ` r t It 1` 1~ t\ i `I 1 ~ ~ 1OR APPRD4ED EOUALI ~ 11 ~ t 1 1 r~ a W
i ~ ~ 1 10' PREFORMED SCOUR HOLE CONSTRUCTION SPECIFICATIONS: ` 1} I } 1} 1 ` I } 1t 1` aka . ` err a ' I J
° MAX. 3'1 SLOPE , L TOP OF DAM = 299.50' ~ 1 1 1 ~ ~ r ; r \ ~ ~ ~ r0~
$ ,EXTERIOR FACE - D 1. THE PREFORMED SCOUR HOLE SHALL BE LOCATED OUTSIDE OF THE l 1 1 I ~ I,` I
o _ NEUSE RIPARIAN BUFFER. ` EMERGENCY SPILLWAY - 297.50 ~9L~r t [ I t ~ 9 t 11 ~ 51 ~ ~ ~ 1` ~ `i~. 0 W
j, 2. THE PERMANENT SOIL REINFORCEMENT MATTING (PSRM1 SHALL BE I t ~ t ARMOR UPSTREAM S[DE. DOWNSTREAM SIDE AND TOP I I I + l r 1 1 0 1, Z
AM WITH CABLE REINFORCED CONCRETE CELLULAR TUCKED A MINIMUM OF i F00T UNDERNEATH THE FILTER FABRIC I f ~ OF R ! lO~~\ ~ ~ I I S I i i ~ 1 14 :r+ . 1 W
d MO TEC ARMORLOC SYSTEM. W -YR S ORM • 97 78' AND NATURAL GROUND AROUND THE PERIMETER OF THE SCOUR HOLE. ~ I S MAT OR THE AR R ATER LEVEL 100 T 2 ~ o ATIQN ON SHT C5,31 - ~ 3. THE SIDE SLOPES FOR ALL FOUR SIDES OF THE SCOUR HOLE SHALL I ~ ' r,, (SEE NOTE 4 UNDER CERTIF[C WATER LEVEL 25 YR STORM 297.68
- - - - - I 1 o - - - - - WATER LEVEL 10-YR STORM • 297,62' BE 2:1 SLOPES. I ~ 1 I l 1 ~ I 11 Iii ~ '6Q ~ i7
- WATER LEVEL 2-YR STORM • 297.28' 4. ALL RIP RAP USED FOR THE CONSTRUCTION OF THE SCOUR HOLE
~ TIE TO EXISTING GRADE - - - - ' - - WATER LEVEL 1-YR STORM • 296,88' SHALL BE NCOOT CLASS B RIP RAP (d50=8"). THE MINIMUM DEPTH ~ - - - - - - - - - - 1 j a - - - - _ ~ - OF THE R[P RAP SHALL BE 12 . I t ~ 1 ~ , 1 ~ ~ ~ it ,m tr
11 I I r I I I ~ . 0??"~``y` ~fp /4rf ~w
N - - - - - - - - - - 5. THE SCOUR HOLE SHALL BE CONSTRUCTED IN UNDISTURBED SOIL. 6. THE PREFORMED SCOUR HOLE SHALL NOT BE CONSTRUCTED UNTIL i III I 1 l I I f r+ ' rr I I 1 1 i it ~ ~ ~ • ~ .,O( ~~i 1
NTS a - , THE ENTIRE AREA DRAINING TO THE PREFORMED .SCOUR HOLE. HAS ' MAX. 3:1 SLOPE INY - 291.00 ~ ' 1 t I I' ~ I i I I I' I pal ` 1 / ~ ~ fl 7(9 ~ W I d I
~ INTERIOR FACE BEEN STABILIZED. } i I + r I' I v ~ SEA1 I I Zt I /I 2A + I I I I I' 1~ I I ~ 9 1~ 1 ~ S '15395 ~ ~ 0 ~
~ 7. THE PREFORMED SCOUR HOLE EXIT AREAS SHALL BE STABILIZED • 4 ~ W[TN VEGETATION IMMEDIATELY AFTER CONSTRUCTION OF THE / I r I Q w. , J I I . . ~ J ~ + ~ r r I I i i ~ it 1 ; STORMWATER ~OQ~'~H W I
- , SCOUR HOLE, ~ } I / ~ J 1 r ~ rl I I 1 ~ ` BMP EASM' T ~ I, Y~.~ ? ~ > I
~ 50 TOP OF DAM =.299.50 B. AFTER CONSTRUCTION OF THE SCOUR HOLE. ALL AREAS AROUND ~ I % m L 1 I I 2 i , I l 1 t ~ I1 V t I I + r ~ I I 1 + t ? ~'~i W
THE SCOUR HOLE SHALL BE CLEARED OF CONSTRUCTION DEBRIS h, ~ h, I I I, ~ i I i 1 9 ~ + ~ 7~
m MAX, 5:1 SLOPE AND THE EXIT AR AS SHALL BE CHECKED FOR POTENTIAL OBSTRUCTIONS I E I f .I o THAT COULD PROMOTE CHANNELIZED FLOW. + INS . I li 1 I ~ 1 r~ t I 1 I ` ~ ~ ~ i
~ + G z - 9. THE INSTALLED STORM DRAINAGE SYSTEM (INCLUDING DETENTION I ` I I' 1 ; t ii t^ I i I I ` 1 1 t? C ru i~ t ! r I t
- o _ _ BASIN N0. 5 AND PREFORMED SCOUR HOLE) SHALL MEET THE DESIGN + ~ +I 4 1 I tl , / t ~1 ?rii ~I I! r ~ ~ i ~ i ` i\ 1 1 ?9~ \ ~ ~-~--x ~ ~
a m - ' _ - - ~ SPECIFICATIONS UPON INITIAL OPERATION ONCE THE PROJECT PRELIMINARY , I
- ~ [S COMPLETE AND THE ENTIRE STORM DRAINAGE AREA IS STAB ILIZEO. - - - - - - - . ~ DO NOT USE F'OR CONSTRUCTION ~ ~
Y m . - - - 1!+_ RFFFR Tit CiiFFT C5_G Ff1R CFFIIiNf, CPFCIFf('ATIhNS.
0 BALL RCP STORM PIPES EXITING BASIN SHALL BE RUBBER GASKET JOINT "0= RING PIPE. JUN 2'~n~ I
z NTS GASKET JOINT PIPES SHALL ALSO BE WRAPPED WITH A DOUBLE LAYER OF NON-WOVEN FILTER FABRIC ON THE OUTSIDE OF THE PIPE AT EACH JOINT. LIFT HOLES WILL NOT BE SCALE IN FEET LLI ° ' U,
N EMERGENCY SPILLWAY = 297.50' Q-100 WATERLEVEL BASED ON STARTING ROUTING CALCULATIONS 16 a co WITH WATERLEVEL AT TOP OF RISER AND ORIFICE BLOCKED, DENR • WATER QUAVTY W _ M ALLOWED IN RCP PIPE EXITING BASIN. WETLANDS AND STORMWATE
Q 0 15 30 60 90 120 y - I
o f is b a
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16348c3_4 don 5/29/2000 10:21:57 AM PLOT BY=john

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w i / ~ ~ I , PREFORMED SCOUR MOLE FOR i
I 1 ~ i / i ~ /
~ ti DETENTION BASIN N0, 2 ~ I ~1J ' ~ - ~ ~
! ~ _ ` i 11 I' \..II 0 1 ' I i 1 II ~ ' ~ I _ ` ~ (~/1/.J -m• ~ ~ /y~ r r a a . . (~}p~. - 1
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~ ~ ~ / 01 I I \ ~ ° - - I 9l~ / STORM DRAINAGE CALCULATIONS FOR AREA DRAINING TO DETENTION BASIN NO.2: ~ I ` ~
1~ l / / ~ /
' ~ r I I ! ! { ~ •q pti DRAINAGE AREA TO BASIN 7.7 ACRES ` 1
i ~ ~ COMPOSITE RATIONAL C = 0.57
i / _ ~ INTENSITY = 1:0 INIWR ~ y ~1-~1, ~ ti ~ - ,
~ 1 / / / I DISCHARGE (Q FOR 1.0 INIWR) - 4.4 CFS lip` i j ~ 1 i t I •i~
/ / ~ , ~s~{ '
Np ~ , I~ m ~ ~ FLOW INTO BASIN BASED ON .300 J~ 1~)J ice} 1 l~~d•. ~ `--~tiaz- , ,`1 ~
I ~ / ~ / _ / ' 1.0 IN1HR INTENSITY 4:4 CFS
w / / y / ~ N ~ FLOW OUT OF BASIN AT 1:0 IN1HR
c,~ \ \ I I'm ' / j l r` WFLOW TO BASIN (BASED ON • I
/ „w ti ~ - RESULTS OF ROUTING CALCS} 0.4 CFS T~f . . ~
t o _ OUTLET PIPE DIAMETER = 15" RCP
I I . ~ J ~ ORIFICE ClIAMETER` = 4" DIAMETER ORIFICE ~ I 1
I I I I ~ ~ ~ ~ ' ~ Q (1.0 IN1HR FLOW TO ~
~ / / ~ ~ i t I> / l 1 i/ ~ 4 ~ PREFORMED SCOUR HOLE - = 0.4 CFS ~ ~ - "f ~ `I, SSING SU~~IVI~ION
L ~`rt~ ~ ~ i~' I ~ GOODWIN CRO :1
U53 Q10 DISCHARGE TO PREFORMED PREFORMED SCOUR HOLE FOR A:
l , , SCOUR HOLE ; = U.9 CFS 96.
DETENTION BASIN NO.2 ° r ,fl ~ r SCALE: 1" = 50'
JIN . 0 8 1 0 3 1 SHEET PSH-2

•
ALL CONSTRUCTION SHALL BE = : ANCE WITH ~'`ITY OF DURHAM AND NCDOT STANDARDS SPE+ s, TEMPOHAAY BENCHMARK: BNK GONTNbL IAON PIPE _ ti+ IRDS,: SPECIFICATIONS AND DETAILS Pw. oa~5-a~2 ~~s~ AHD oa~~-ova-az~a
+ ~ N - 85Z•666.6876 E - 2,036,+292772
EL - 34B.3Y SEE TRASH RAr.K
` (SEE QETAIL THIS SHEET) ° >i. i•
PREFORMED SCOUR HOLE CONSTRUCTION 51 INSTRUCTION SPECI~ICATIONSs
i TOP OF BER1 ELEv. 293,x0 1. THE PREFORMED. SCOUR HOLE SHALL.I i HOLE SHALL BE LOCATED OUT .
I a w NEUSE RIPARIAN BUFFER. ER. SIDE OF THE
! ~ 2. THE PERMANENT SOIL REINFORCEMEN' REINFORCEMENT MATTING (PSRM1 SHALL BE
1 I u 4" FAIRCLOTH SKIMMER j - a DR EauAL. +arracHED ro TUCKED A MINIMUM OF 1 FOOT UNOEI 1 FOOT UNDERNEATH THE F II,TER FABRIC ~f ~ti~/ ~ ~ r~ ~ ,r ~r
ORIFICE DURING. CONSTRUCTION. ' ~ ANO NATURAL GROUND AROUND THE'PI AROUND THE' PERIMETER OF THE SCOUR HOLE. ,f ' J i ALL FOUR SIDES OF THE SCOUR HOLE SHALL ~ ~ ~ \
95X COMPACTED BERM a SITE STABILiZEOEANDEREMOVbR 'BOUYANCYCALCULATIONSFORRISERIBARREL 3. THE SIDE SLOPES FOR ALL FOUR S11 'i ~ 289.50' APPROVED BY DURHAM COUNTY (Goodwin Crossin - Detention B" 'in N : 2 BE 2:1 SLOPES. EROSION CONTROL ENGINEER( g as 0
a 4' PRECAST 4. ALL RIP RAP USED FOR THE CONSTRI lR THE CONSTRUCTION OF THE SCOUR HOLE (d=15~ OR 1~"y'~ - ~ ~ {STaI{~'113~.Rti~^
F ° MANHOLE SECTION RlSerln I_ 60 et 4.0 SHALL BE NCDOT CLASS 8 RIP RAP ao L a~ _ side Diam er ft >S 8 RIP RAP Id50=$"I. THE MINIMUM"DEPTH ~ f ~-1-~
!.I +8" RCP DURHAM STANDARD PLASTIC OF THE RIP RAP SHALL BE 12". m laoox sr Ps ~ +s ~PACINa. RlserWalLThickness m 5 . o _ aL GN wITH T ASH RACK ~ 5. THE SCOUR HOLE SHALL BE CONSTRUI .L BE 12". _I ~ 1 r
' HATCH. Pond Bottom EI Y ' a atron ft . 285:70 I~; _ 6. THE PREFORMED SCOUR HOLE SHALL I .L BE CONSTRUCTED IN UNDISTURBED SOIL. I HOLE SHALL NOT BE CONSTRUCTED .UNTIL ~ . ' ` ~ n
• • ~ Riser Crest Elevation ft ; ~ 289.50 • THE ENTIRE AREA DRAINING TO THE ' t o Dens' of Riser Mati Ib! 150:00. BEEN STABILIZED. N ~IN[NG TO THE PREFORMED SCOUR HOLE HAS ~ ~ ~ ~
~ I 2 DIA ORIFIC
II Is• rYP• e ~ +INV = 2sr sod, Pi a Inside Diameter in : 18 t, THE PREFORMED SCOUR HOLE EXIT. AI I-HOLE EXIT AREAS SHALL BE STABILIZED n
~ W TH VE STATION IMMEDIATELY AFT( PI Wall Thickness in . 2.25 I G dEDIATELY AFTER CONSTRUCT [ON OF'THE SG(IA~tEFP,EFtIED ~ ~ ~ I'tc",II+IF{~RCk~~~J1~A1'fING: SCQEJR H {PFSHj . PS1~1 ~}'lAll. ~
I j Len of Pi EX 'setl ft 10.00 SCOUR HOLE. 5 INV = 2B3,60' r • . 8. . a ~ a p a • , • a a ; Dens' H2O Ibl 62.40 Pt~AP ft~,BA~N ~ ~ SE'I=IJ~'1(t~Tl~t JEGETAI'ION n OF THE SCOUR HOLE ALL AREAS AROUND &I~w~t~~a~s~ p1'~ST~;'~~ ~ ~
j:' ~ ~ • B L1.A5T• ~ • THE SCOUR HOLE SHALL BE CLEARED ' Volume H2O Dis laced b":Riser : 69.72 .L BE CLEARED OF CONSTRUCTION OEBR I S ~ ~ ~ ~ `~+,~.u ~ ~ I ~ v+
L ' • CO CREPE , ' • r . . a,. .BASIN INVERT = 285.70' AND THE EXIT AREAS SHALL BE CHEI , ' ? • . " ' , ° , Wei ht H2O Dis laced b Riser Ib : 4350.62 THAT COULD PROMOTE CHANNEL I ZED I SHALL: $E CHECKED FDR POTENTIAL.. OBSTRUCT IONS W a 0
a a. a. ~ a a .a . . ~ ' VOIUme H2O DIS taC•ed ~ PI e : - 27.61 9. THE INSTALLED STORM ORdINAGE SY! CHANNEL I ZED FLOW. ~ Ij, ~ ~ W A DRAINAGE SYSTEM (INCLUDING DETENTION ~
' DURHAM STANDARD PLASTIC - R ~uR Wei ht H2O DIS laced b` PT a Ib : 1722:97 BAS 1 N N0. 5 AND PREFORMED SCOUR :FORMED SCOUR HOLEI SHALL MEET THE DESIGN z r' ~ ~ LL
'a STEPS,. pN THE OUTSIDE OF ' TotaLU IiftForce lb 6073.59 SPECIFICATIONS UPON ENITIAL OPEI ) ENITIAL OPERATION ONCE THE PROJECT ~ G
MANHOLE 9 iS' SPACCNG. 6" DEEP wasHED ~ ONE , i [S COMPLETE AND THE ENTIRE STORI ALIGN WITH TRASH RACK :ENTIRE STBRM DRAINAGE AREA IS STA81L[ZED. W - 0 ~ ~ U ZW Q
I HATCH. 10. REFER TO SHEET C5:6 fOR SEEDING Wel ht of Riser Ib : 3295:40 i FOR SEEDING SPECIFICATIONS. i ~ ~ a ,3 Figuxe 8-5 ~ N
Wei ht of Pie !b : 1491.:03 -
' Pi (Riser Downward Force 16 : 4786:43 ~,n NOTE; - Preformed scour hole cross. section (NCD(}T 200&) Z ~ N 0~W
~ R CT RE DETAIL I. RISER STRUCTURE SECTION SHALL OUTLET ST U U N M ^
BE STRAPPED TOGETHER WITH Ballast Concrete: i ~ Nor ro SCALE STAINLESS STEEL STRAPS, ~/4" THICK ORIFICE PLATE (24" x 24" T PLATE (24 X 24' 1 CONGRE E ~ z ~ ~ ~ m'~?
u Minimum FactorofSafe . 1,25 2, RISER/BARREL SHALL BE GASKETTED BOLT TO HEADWALL WITH L WITH HEADWALL SLOPE RS C' W i STEEL 1 SEE DETAIL .INDICATED d- f~a•~ pi O z fn ~ ~ t7
`8 w * 4-100 WATERLEVEL BASSO 4N STARTING ROUTING CALCULATIONS JOINT PIPE AND EACH JOINT SHALL R Ulred tk3lla$t thlCkneSS In : 17.66 s/e" DIA. STWNLESS STEEL i+, ° WITH .WATERLEVEL AT TOP OF RISER AND ORIFICE BLOCKED. BE WRAPPED WITH A DOUBLE LAYER a BOLTS, NUTS W/WASHERS. i4 TOTAL( Provided Ballast Thickness in : 18 /e° sTaNLESs USHERS. i4 TOTALI SHT C5.7) ON PLRNS ~ ~ ~ I~~(~'~:~~~I-ry~y,~~ p~~ p 0 W
OF NON-WOVEN FILTER FA$RlC: STEEL BOLT (TYP) Total Downward Force Ib 761:3.863 n .Er. `L~~'ll~l~~lY14... ~I aW.~.~. 4 OIA ORIFICE ~ ~ p
~ Provided Factor of:Safe : 1.25 4" DIA. ([NV= 285.70' } ~ ~Qr~#~fiy,"~~ ~ J ~ "r
t o • ORIFICE
p (INV. • 285.70'1 I~ O O N r'/~~~.
4 z _ - in ~ NOTES. '~i ~ ' ~ „ o ~y 3 X3'X4 15" RCP f~'~~ ~ ('SI ~ w ~ Z OUTLET PIPE '~Ii.' ' . . , ~ ~ ~ W 0 q
' r ALL REBAR SHALL BE #4 REBAR CONCRETE Ii ~ i. • • PAD AT BASE OF 11T~~
• ALL REBAR AND ANGLES SHALL BE GALVANIZED WITH A BITUMINOUS COATING. HEADWALL (CENTERED f CEOTERED LfNEF~ ~ E~ PIPE ~ ~ ~ r ~ W Q
I; ON ORIFICE PLATE). ALL POINTS AT-WHICH TWO SEPERATE PIECES Of REBAR COME TOGETHER :PLATE).--'r ~ITE'I T~E'E 21~tLT~E;f~ F~+ `"~il4ll~t, m ~ ~ ro F u.
SHALL BE WELDED. THE ANGLES SHALL. BE WELDED TO THE ASSEMBLY aT d VARIES DEPENDING ON LOCATIONS SHOWN AND SHALL REST DIRECTLY ATOP THE RISER. NEEHAH R-7512-81 CAST IRON PIPE Q~~ ~F •
MANHOLE WALL THICKNESS ORIFICE PLATE DETAIL ~ NTS PLATE -DETAIL SCREEN FOR 12" PIPE. ANCHOR TO - ~"j NTS CONCRETE PAD USING STNNIESS m
• THE HATCH SHALL LINE UP DIRECTLY ABOVE STEPS WHICH SHALL BE INSTALLED ' ON THE INSIDE OF THE RISER STEEL (30LTS, NUTS W/WASHERS.. (4 70TA1) ~DT~ - B ° 4.O FT
ACCESS HATCH WITH FABRICATED HINGES THE HATCH SHALL BE SECURED WITH A CHAIN AND A LOCK. THE KEY SHALL ~B~ W = 4.0 FT ~
' I R AST • 4 (l P EC 3.00' BE HELD [N POSSESSION OF THE PARTY RESPONSIBLE FOR MAINTENANCE OF CITY OF DURHAM ~
MANHOLE THE. POND. + I PUBLIC WORKS DEPARTMENT ~
1, n i L 2 X 2" X-0.25 }~2, APPROVED 0
ANGLES, TYP (4) ' 00' a ENGINEERING SOUR HOLE DETAIL " '
~t R~ 2 X 2 X 0.25 ANGLE ING DATE NTS ~
c •pp NOTES STORM WATER s 9 REFER'TO SHT C5,3 FOR OAM EMBANKMENT TRANSPORTATION ' TER DATE ~ C
• ~ o ~ CONSTRUCTION STANDARDS AND THE TESTING, TAT I ON DATE p Q ~
ANCHOR TRASH RACK TO MANHOLE WAIL WITH FOUR ~ •0 OBSERVATION AND CERTIFICATION REQUIRED ~ s 0. EQUALLY SPACED CALNNIZED STEEL CLAMPS: CLAMPS ..DATE- ~ d
FOR.-0ETENTION BASIN CONSTRUCTION, ~ ° SHALL BE ATTACHED TO THE MANHOLE RISER BY 2" X ...DATE yy V
0 0 0,5• CONCRETE ANCHOR BOLTS: 10 TYP. E F W O
a TRASH RACK SECURING I t tl t~ N 1~ 1
~ i
TRASH RACK DETA L a ~ 11 ~ ~ t I t
~ p \ t ~ ~ d d\'~ ~ ~ Imo; ' 11 ~ ~ a
m ~ \ ~ NC~OT HEA~WA~L --~--II-~'~ (SE ET IL HETC.7 r ( 1 I ~ 0
a t ~ ~ ~ ~ ~ ` a - t „ J Z_
i; 1 1 ~ 1 ~ ~ 1~~ II 1 1 1 1 1 ~ a ~ ~ ~ a ~ ~ II l` j ~ ~ N
o 4000PSI MONOLITHIC: CONCRETE CRADLE 4000PSI MONOLITHIC CONCRETE CRADLE 1 1 1 q I 1 I m ~ UNDER FULL LENGTH OF PIPE,-CONCRETE UNDER FULL LENGTH OF PIPE. CONCRETE WETLANDS ~ x PREFORMED SCOUR HOLE ~t I , 80..00 LF 15" RCp ~ 0~ 87 ~ ~ tq m O(1 0 IN/HR) = O.A:CFS ~ ) INV IN = 285.701 Z 0
BE 2.2.5' SLUMP. CERTIFICATION 2' 2' A - UMP. CERTIFICATION ~ ~ t o Z 2 SHRLL SH LL BE 2-2.5 SL ~ 1~.~ 1 ~ . ~ ~ ~ ~ ~ ~ ~ ~ D1 = 0.7 CFS ~ ~ 1 IjNV OUT = 285.0 ~ ~ ~ ~ F ~ z
~ THAT CONCRETE MEETS THESE THAT CONCRETE MEETS THESE ~ ~ ~ r 01D = 0.9 CFS ) i'
• 18' SPECIFICATION'S SHALL BE PROVIDED TO 15 SPECIFICATION'S SHALL BE PROVIDED TO I~ 11• 1 • D ° RCP ~8 RCP THE OWNER. PLACE UNDER-PIPE WITH ~ • n : ,,G. ~ a .o ~ L . ° ` ° . ; . d''~ v e ° ' THE OWNER. PLACE.. UNDER PIPE WITH 71 ~ II ~ ~ 1 ~ 1 i (SEE DETAIL THIS SHEETI ~ II ' ~ ~ ' ~ ~ II ' p ~k 6, x 1 I ` ~ Q0 ~ F NCING d L MITS Z
° ° ~ o'. HAND EI]UIPMENT AND VIBRATE HAND EQUIPMENT AND VIBRATE # t 1 1 ~ 0 DISTURB CE (TYP)
b ~ ,n INTERNALLY FOR CONSOLIDATION,. FINISH \ , INTERNALLY FOR CONSOLIDATIO FI IS ti~ Q
i. o ~ ° a ' ~ . , •n ~ n ` W F r ° n• ° ° i` n . v v n• SHALL BE 'ROUGH" . PLOWABLE FILISi 11`~ t t # ~ o ~ o SHALL r3E ROUGH . FLO ABLE ILLS ° . , m ~ ° : ° , ° ' ' ~ 'n SLURRIES, OR OR GELS ARE. NOT . • n`...°., n, . , ` ' _ • ' ° o•. 4 SLURRIES, OR OR GELS ARE NOT \ _ m ' x I - - w 'off ~ I
. ~ J a PERMITTED. -PERMITTED. ~ .~I 1 1\c~ n ~ I I 1 ' ~ ~ ~
v S v ~ ° n, v v, ° n c v' ° v' n' v' n' n c 7 `
i ~ ~ \
- - - m ~ ` 9 ~ 1 1 ~ ~ - I
ECTION C-C S T I N B-B . , C 0 SE Q •
o , W 2 1 2 ~ , / \ ~ ~i f ~ 293 ~ ~ ~~II ^ ~ NCDOT~ ~LASB B RIP RAP ~ m W 4
- - i , ~ . 1N I 050 = 6") 22' DEEP op 0 I~ y r,. • , ,1 ~ r ~.,,V ~ 3 1 / ~ W/ GEOTEXT[LE FABRIC BASE
o m ~ 7 L ~ H \ C ~ f~ I~ - I I \ W 45'
\ ,u Y N _ - ~ - 1 , \ ~ ~ ` R~ ~ OT ENDWALL
0 / 4•`,~ _ 4,"~• , ? ~ 294 - ~J ~ , SEE :DETAIL SHEET C5.7 FLOODWAY FRINGE
DETENTION BASIN N0.2 9' ~ ' p. ' N
~ ~ PRE-SETTLED DAM HEIGHT 293.00 - 287,00 ~ \ ~ ¢ _286 I~1~ .l a
6,0 FEET ~ ~ ~ c ANTICIPATED SETTLEMENT / 28 Q25 WAT~RLEV~L IN ~
I " (ASSUMING 5.0% SETTI:EMENTI (6.0 fEET)(O,DS) ~9 ~ / / NCDOT 6ADWALL W/~ ~ - ' ~ FEMA FLd6DPLAIN = 285.5'+ x / ~ 1 A" OfA ORIFICE ~ \ ~ ~ r'' ` 0
EMBANKMENT 0,30 FEET S r ' (SEE COMPACTION NOTES SETTLED TOP OF DAM 293.00 - 0.30 i ~ / / ' p' ~ ORIFICE INVERT = 285.70'
Ir • 292.70 FEET ~ ~ ~ \ 11. ` ON _SHT C5:31 SETTLED DAM HEIGHT 292.70 - 287,00 r~ ~ ~ ~ \ ~ ,,(SEE DE lL THIS SHEET) - ~ Z Z
+ 5:70 FEET (CLASS C DAM( ' ~r L , ~ ~ T _ ~ ~ N
~ X. 3:1 SLOPE 10 _ 4100 FREEBOARD 292:70 - 291,38 ~ MA TOP OF DAM - 293.00. ° R FACE 1.32 FEET ) 1.0 FEET OKAY ~ ~ ~ r / ' ARMO EC R 1tCOC~sY5T~-----' r---- Zg~ ` ' ~ W
? ~ - EXTERIO _ ~\~`~'-L` :100' CfTY OF 52 lgR'APPROVED-~OUAL) - - - - ' i ` \ / / - - - - _~~-~-~T-0RMW,QTER ` `0.URHAM BUFFER
_ EMERGENCY SPILLWAY = 291.00 ' ~ - --~B1dP-'EASM T AND GREENWAY 9 , - _ I \ EASEMENT
..ARMOR UPSTREAM SIDE, DOWNSTREAM SIDE AND TOP _ S ~ - - i __..--n ~ - ~ti IMEASUREO FROM - J ~
a Z , °c OF DAM. WITH CABLE REINFORCED CONCRETE CELLULAR _ ~ ~ _ - ..~2 F,__ '``STOP OF BANK) - - - _ _
MAT OR THE ARMORTEC ARMQRLOC SYSTEM. WATER LEVEL 100-YR STORM • 291,38' ` } r T C5.31 5 (SEE NOTE 4`UNDER CERTIFICATION ON SH _ _ _ _ WATER LEVEL 25-YR STORM • 291;22' _ v
- - - W TER LEVEL 10-YR S ORM • 290,76 0 LF P ~ 1.0 ~ -
- - - - - - - t WATER LEVEL 2-YR STORM • 289:74' \ a ' T[E TO EXISTING GRADE - - - - - WATER LEVEL 1-YR STORM •.289,32' ' ~ ~ - ~--~96------'~ ;INV 1N - 283.60 I ~ ~S W _ ~ INV OUT = 283.00 t I r ~
~ ~ _
- - ~ ~ ' - ---nn~~}} . 30P = 284.50 - i t _ `
o r ~ INV - 26380 ~ , ~ - , / \ (SEE DETAtL THIS ~ 1
N S P - MAX 3'1 SLOE INV = 286.00' , SHT1 _ I ~
} INTERIOR FACE'
N I m
• ~ ' ~ 1 IY
N 50 - ~ L ' ~ ~ ~ I ~ Q I ~ , SERI. J ~ ~ ~ / ~
- \ - _ _ ' ~ ~ 15395 ~ W _ - ~ f
' "a MAX. 5:1 SLOPE TOP I]F DAM = 293.00' ,,'J~ 1 \ ~ 1 I i : : a
oo \ X ~ - ~3 ~ r • W z Z I ~ 7
! - - - x..- i I r err U
! C - J J ~ 305.____ f I ~ / ~ ~ ~a~J~~ ~
Z qqrc ~ Jv. - -
;1 h, ~ - - - -
t a: m - - - U ~ _ ~ , t ~ 1 f ~ PRELIMINARY
W N15 nF1,~~'d[1 r~ .~t`..~ I{l- ~I I I I , 1 1~ ~~J DO NOT USE FOR CONSTRUCTION W
x EMERGENCY SPILLWAY = 291.00 * Q-100_WATERLEVEL BASED ON STARTING ROUTING CALCULATIONS WITH WATERLEVEL AT TOP OF RISER AND ORIFICE BLOCKED, *ALL RCP STORM ALL RCP STORM PIPES EXITING BASIN SHALL BE RUBBER GASKET JOINT '0 RING PIPE. Q Lf
w H GASKET JOINT PI GASKET JOINT PIPES SHALL ALSO BE WRAPPED WITH A DOUBLE LAYER OF NON-WOVEN W
a "o FILTER FABRIC 0 a m SCALE IN FEET FILTER FABRIC ON THE OUTSIDE OF THE-PIPE- AT EACH JOINT. LIFT HOLES WILL NOT BE W U,
ALLOWED IN RCI OO ALLOWED IN RCP PIPE EXITING BASIN. JUN 2 7 2008 Im c , O W 60 90 120
i<. 'ZO e" DENR WATER GUAU'IY o is so
{ 0
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T 1634813_5 don 5129/2008 10:21,25 AH PLOT BY=john

TANDARDS SPI ALL CONSTRUCTION SHALL BE IN ACCORDANCE WITH CITY DF DURHAM .AND NCDOT S , IARDS, SPECIFICATIONS AND DETAILS PiN:0835-04-52-1161 AND 0$35-04-53-4274
TEMPOPARY BENCHMARK: BNK CONTROL IRON PIPE ; m N - 852,655.6876 / ~
D E - $036,123:2712 ~ / ~ EL.> 349.31'
/ ' I i 1 ~ NC GRtD (NAD '83)
Y ( ~ ~ ~ t/ ~ . ~ i
~ ~ .I o I I, ,
:X ! ~
, m ~ i ,

'r
I START OF 50' NEUSE ' \ „ ( j` ~ l 4 URHAM 6UFFER RIVER RIPARIAN-BUFFER \C ; / ~ i
IMEASURED FROM IMEASURED FROM TOP OF f . --1--•'~ ~ r• ~ o _ I TDP OF BANKI ? I ? / 1 ~
~ BANK] .1 ~ /
, r
" \ \ I 9z t'7~ ~ 1os 107 I 108 I 1as / ; ; ~ ~ ~ + \l \ , . 0 .0 ,1 , t , - 1
e \ 1 ~ d ,1 ~ ~
' 1 " 1 t.~--~o 105 711 • ~I]•. i ' fig NOD N
m \ 1 ~\t ~ - / I ~ ' ..DURHAM BUFFER + Q 1,,,:, ; AND DREENWAY \J O , y. _ ~ aN
? 1 772 i 1~ IMEASURED FROM \ ' 90 1 . / ; f ; TOP OF BANK ] ' \ ? ~ ~ , J ` Z JQ
1 O 103 ,l ~ , ~ ; ? ~ O •^•J HAWTREE DR.
" 94 ~ 10 o ~ 75 ~ ~ " II ~ N 0 ~ ~ ~ oc
x I B9 95 ~ 1 G 5 ' NEU RI ~ I I
W><. AW®&C~ R pEi;tc ~ '~A ~ ~ ~ .9~ 1a ~ S ~ i ~ ~ m , so PpRLICR pR 7 1 (MEASURED-FROM \ lily zWZ z a
L i • J` 1 97 I ~ 7` I TOP OF BANK ] / \ , 5 ~@ ~ t 0 ~ / ' • • ~ ~ 98.17 ~ '=~C, ~ ~ , ~ _
1 ' 95 d ~ 4 Q \ \ • ~ . 100 TY F ~'nWF'0>~
es ~ 9, off, 113~~ ~ \ ~ r/ ~ \ a ~ / 3 I / O~ J y ^ M `•0~~ ~ ANONGREENWAYR g ~ ~ t-I
~ ~ 101 9 O / 25 ~ 25 n r O \ O 11 1100 , ' ~ O f1 0 I 85 / \ , / O , 7 / 99 O \ - \ ~ 1 , ' (MEASURED FROM Q CS ,'/11 ` ,`11'N TOP OF BANK)
" O j I i" / O NDS i I W p 01 ~ ~ 11` ~ N
Z ~ 1 y" 84 73 ~ 7E OOD L 7' 65 \ ~ 27 / / 7 70 1 O \ ~ ~ , 23 0 - a 70 1 1 ~ RIPARIAN BUFFER Iw, Q OwD ; 11, ,1\ (MEASURED FROM I _ ' _ fl ~ ~ ~ o
\ - - ss Q , O` ~ ) \j ~ 0 ~OP OF BANK) I ~ - - _ _ - - ~ ~'J y
2 \0 ~ a 9 U ~ / ~ ~ i i ~ r ~ 1 ~ \ 29 BUF E - S O i6 ~ ` 1 O7~ ~ ~ / i6 / I f~~ONJ
- \ ~ / 71 O / 27 T / i t s9 / ~ O L O ~ , , 0 ~-1 _ Q
- \ rl \r \ O ~ ~
, ~ , 'w: - ~
,J / 11 (nwO~N
0 , . , 0 a4 , , ~ 0 , -:ti.. C \ \ ~ \ , - 141 O i
o / \ ~ / ` \ ~ 79 I 78 / I I O - ~ 43 / I 1 • • / .
v \ \ 1 / \ ~ I i O / m m \ ~ _L ~
. d q~` ~ e mUco~F-u.
/ r I I ~~~i~s ~ ~ -I
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p \ , 0 ? 0 \ . f ~ 38 1 I • , I l `ia ~ , IMPACT E C-----
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~ 124 ~ - , ~ ~ f , \ GR04E o0 ~ ti~ II
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~ 7.7 5390 N/A A STREAM .'135 1,590 25 r ' V ~ i
3 0 _ B WETLANDS 144 215 BR155 48125 3 720 l
g C WETLANDS 30 570 3.450 1680 6.140 1 / / Ny 1~11111111111j,
~ D WETLANDS 3Q 420 1.580 1550 1,375
E STREAM 30 660 1255 1;260 NLA / / ~ EX WEST BANK DNNECTOR • ' "'••p</*+++ y

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l ~ ~ ~ \ ' \ ! , 33 -yam ~ S \ ? ` ` I ~ ,1 ~ ~ ~ I HARVEST GROVE DRIVE STORM DRAINAGE OUTLET:
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. \ 1 1 ~ % DRAINAGE AREA TOB - ~ ~ I ASIN - 1 ACRES
\ > COMPOSITE RATIONAL C 0.64 ~ ~ , ~c?, ~ `3~Z~~/ INTENSITY -
~ 4 - 59 1'~`,
i ~ l 1 w I , ~ ~ ~ 1 ti ca ! 1 , DISCHARGE (Q FOR 1.O INlHR) = 0.6 CFS
15 - RCP ~ 3 ~ 1 ~ ? 1 1 , ~ I NV =..332, 57 ~ 1 \ ~ ~ \ ~ \ \ 1 1 1 ' ~ I \ FLOW TO LEVEL SPREADER BASED
~ , / ~ ' ~ ~ ` \ \ ~3 ON 1.O INlHR INTENSITY = 0.6 CFS
~ 1 ~ \ 2p
. ~ i ~ 1 ~ -1~ FLOW TO LEVEL SPREADER BASED
~ ~ ~ I ~ / _ ! ~ ~ ~ ~~'s. ~ ~ ON Q10 DISCHARGE 0.8 CFS
~ - > LEV EL SP RE ADER FILT
' i I ER STRIP - 50 FEET OF GRASS AREA ' ~ LEVEL' SPREADER DESIGN 13 FEET/CFS OF DISCHARGE
~ . ~ ; I \ LEVEL SPREADER LENGTH (MIN) = 13 FEET J.."
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~ DUKE POWE AINTAINS 1 1 ! 1- I ~ I I ~ \ ~ 6 , ~ ~ ~ ? ~ 15 EASEMENT. EACH , 1 \ S i / I ~ / ~ \
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RHAM OFFER ` ! I I 1 ' ! ,~h ? ? ~ ~ ~ \ 15„ \ ~ I I I ! / ? \ , ~ .RCP \ \ 1 ~
A D GRE IJWAY , , 1 I I ( ! ~ , INV - 351 79 ~ \ ~ ` ~ ~ EASEMENT' I ~ , I I \ ` \ ~ ~ 1
I I / q- i~ ~ / ~ ~ I ! , I t ! I ! ! ro Y \ r-- 1 330 ^ ~ / -330 I 1\ \ I 1 . ~
I \ I I \ 15 .RCP 1 ~ 1 t ~ I ~ ~ I I
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-170 Xx 350 332- Av-~ GOODWIN CROSSING SUBDIVISION
LEVEL SPREADER FOR
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08 1 0 3 1
"Sot \ 336 SHEET LS-7 -
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SPE ALL CONSTRUCTION -SHALL BE . ANCE WITH CITY OF DURHAM AND NCDOT STANDARDS, r TEMPORARY BENCHMARK: BNK CONTROL InaN wPE ARDS SPECIFICATIONS ..AND .DETAILS Peru: osa~-oa~2-~is~ atuu o~35-oa.~a-a2~a
m N -852,666.6816 - i, E - 2,Ox6d2327T2
l Et.-349:x1' (
1 ~ , 15" RCP TO FES 66
18" RCP TD INVERT ]N = 305.20`
INLET 143 LEVEL SPREADER LIP INVERT OI1T = 305.00' ~ v EL, = 505,30' 4
LEVEL SPREADER L[P JNVERT [N = 341.50' I EL. = 341.50 ~ TOP OF WEIR = 342.50' CLASS "B" RIP-RAP SS "B" RIP-RAP TOP OF WEIR = 305.80`
INVERT. OUT = .c A _ " f ! I CLASS "B" RIP-RAP IDSD - B 1 w/ GE01 „ q 1 18" RCP FROM FABRIC BASE 0 = B"1 w/ GEOTExTILE ~ ~ r RIC BASE FLOW PATH 3" LAYER OF
R ; IU50 = 6 1 w/ GEOTEXTIlE FLOW PATH 3" LAYER OF N ~ INLET'141 FABRIC BASE # 5T STONE CRASS `a't.:~ ORIFICE PLATE FOR '
I; I is 57 STDNE RA S INVERT IN = 341.80' G S 6.0 D[A. SPUTTER BDX FILTER N T 1 INVERT OUT = 341°. 50' FILTER 1,0 [N/HR STORM TO STRIP 15" RCP TO LEVEL SPREADER
STRIP ISEE 0 E 1 , INVERT = 341.50, LEVEL SPREADER (SEE DETAIL THIS SHT} ~ ,
TOP = 346.00` ^a/'•?- ' 305.00' 14LF 0 1.43y O(1,0 [N/HRI = 0.6 CFS
341.25, • 3 FT. WIDE INVERT IN = 305.20' ORIFICE DIR. = 6"
3 FT. WIDE. RIF C PLATE FO ~ CHI STRIP OF 0 l E R [Nti CHANNEL STRIP OF INVERT OUT = 305,00' ORIFICE INVERT = 305.20' FILTER FABRIC p10 WATERLEVEL = 306.25' [NV`. = 304.00' 15' RCP FROM 010 TO LEVEL SPREADER.
CHANNEL ~ FILTER. FABRIC L 0 1N/HR STORM TO INV. - 341.00:: 15" RCP TO LEVEL LEVEL SPREADER APPROPRIATELY SIZED INLET 64 CONCRETE FOOTER = 0,8 CFS ~ ~
' APPROFRIATELY SIZED ~ CONCRETE FOOTER SPREADER ISEE DETAIL THIS SHT1 INVERT IN - 305.60' c INVERT OUT _ 305.20' 4.0' D[A. SPUTTER BOX
14LF ~ 1.43y ~ 0(1.0:IN/HR1 = 1.7 Cf5 { INVERT IN = 341.50' ORIFICE OIA. = 9" tSEE NOTE U Z
f INVERT OUT = 34t.30' ORIFICE INVERT = 341.50' TDP = 310.00' HARVEST GROVE DR, ~
GOODWIN ROAD CONCRETE LEVEL SPREADER DETAIL INVERT = 305.20 ~ ~ ~
CONCRETE LEVEL SPREADER DETAIL } NTS
NTS NOTE
NDTE i. INSTALL 2' ° 0" Of BALLAST CONCRETE 1N BASE OF SPATTER BOX. W ~ 0 ~ . mz F
1. INSTALL 24" DF BALLESi CONCRETE IN BASE OF SPUTTER BOX. vN, ~ HARVEST GRAVE DR.
{ GOODWIN ROAD s SPUTTER BOX DETAIL ~ a ~
! SPLINTER BOX DETAIL RADIUS TO MATCH iNSIOE RADIUS Of I' Nrs W Z o ° Y
NTS SPUTTER BOX I ~W a
t. TOP VIEW ~Q ~ W3OlN
r m ry~r
i ' Z ~ 1 1 o_ 0 b 4/4" THICK. ORIFICE 1 ! ~jW~~~a 1 1 / I 1 W~ n / I rl / ~ p~ N
r PLATE I24" X 24"I - I r 11 rrl it / 1 I ~ i ~o~
i _ a ~ ~ ly b" Q[A ORIFICE BOLT TO SPL[iTER /7 ~1 I ~ _ ~ ti , ` _ r INV -.305.20. BOx w/ 3-8" DtA r !r i, y i ~ ~ ',j ~ .r t l/ 1 / 7~ luy~p~i r ~ r ~ ~ r '1 1 r f / it C r'
J, ` \ ~ It STAINLESS :STEEL r! I r ~ r ` r / r r,~ r j I I /l 1/ i I~ ~ 1 , J~J k O 0". C ~i
o ,ca,, -MwMN ;\.N I, 1 0 o BOLTS NUTS AND I / / ~ ~ / ~ I \ 1 1 J i ~r LEVEL SPREADER/ BYPASS r/Y' r' !rl /i" ~ rlr ~ ,r ~ ~ p 0 w 1 r SYSTEM EASM'T ; \ ~ ~ ~ ( ~ 1 ~ / Q
t FRONT VIN .WASHERS. (4 TOTALI ) r _ \ I / `
` z r ! r . ~ ~.,1 ~ ~ HARVEST GROVE DR. , ~ ~ , ~ ' 1 i I JJJ n , , ~j~ ~ ~ ~
~ _ ~ ~ ~ RI I E PLATE DETAIL
{ o '~a,s` \ ~ NTS. l l l r ; ~ , / f' ~1 1I~ I ~ y~/t wQw~ ~ ~ I J 1 li Y ~ ~ i Nz dp~COm
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_ _ ~ / 1 a ~ ~ ~ \ ~ / r /1A Ill r~ , ~ ~ r ~ 1 i ~ W ~~IW-LL
~ \ 1 1 / ~ I y ~r I r 30' ~ i 30 SANITARY WER ~ • .
` ~ ~ w~ ~ I `1 ~ ~ SPATTER BOX ~ i ) it GRASS FJCTER STRIP f/ ~ 4/ ~ ~ I 1 _ j ~ ~ / U ~
e ,.~1 s~ ~ 1 r r i I RA I 1 ~ V t5EE DETAIL THIS SHTI f , ri G SS : \ ~ ~ ~ , r I I a ~ `w. ! ~~~~..~%,i~x~il`/~~/1 ~J'~' STY/'~IX,~ `+~t _ 1 .a #`~;w .~eoe~ 1~°,~m ~ !~°.b ~ 1 ~ ~~:,~~~.~4` _ I ,r j ,r (REF
\ e ~ ~ , r r REGU[RE ~ ~r REGU REMENTSEONNSHT C5.6 / / ~ / L ~ I ~ Q ~i' f, ` / /i 1 I I I I ( 7 m /
a ~ ~ ` • r LENGTH 50' r/ - ~ 1~ Ir n i~ l In
\ ~ , \ ~ ~ 1 ~ ) r r WIDTH ' ~ I ~ ` 1 1 / J SLOPE 1 ~ ~ WIDTH = 13' / / i ' ~ ~ r j / ~i / SLOPE = 3.33r i . , i ` ~ 1 ~\\\1 i f 1\\ r/r I / /~i
...LEVEL SPREADER. DESIGN; r ~ ~ \ ~ ~ r r i i, r 1 r 1 I~ (J 1 L
iSEE DETAIL THIS SHEETI J r O(1.0 IN/HR1 = 1.7 CFS I 1 \ / r J ~ / /
1 1 ~ ` ~ ! ,s, 1 J ~ 010 WATERLEvEI - 343.10. ~ I:~` ~ ~ \ 1 ` ~ - r r , t I
m 010 TO LEVEL. SPREADER = 2.4 CfS I ~ ~ ~ ~ ~~t ~ ~ i 1 / i J / LENGTH FOR GRASS FILTER = 13 FT>Cf$ I j I ~\~tiz ~ "J ~ 1 r 11 it O~ I~ `,j ~ I i I, 1lJ~~l III ~ ''-/r/ ~ Q~~
-i. c LEVEL SPREADER LENGTH = 31 FEET ~ ^ I a ~ I ( z++;yy ~ / ~ a ~ Z I ~ 1 I / ~aG ~a ` i Z ~ U1
_ 1 I ~ ~ \ /
~ ~ 1 1 ~ ~ S , ~ , o u, a W
~ ~ ' I { , I , r I . ~ \ ~ ~ ~ LEVEL SPREADER DESIGN:.. ,DER DESIGN:. i ,r \ ~ j 11 ~ I `lJ ~ ~ I \ ~ ~ ~
t I ~ I I 1 i 1 z 1 I ° ~ I I ~ I I ~ ~ ti ~ ` Ot"1.0 IN/HR1 = 0.fi CfS ,y I I I I " 'T = D.6 CFS r~ ~ 1 \ 1 f i j O ~ ~i'' i z v 0
E I I I I i I I / I \ ` `I . , 1 010 WATERLEVEL ° 306.25' o I i I I , I ! I ~ ~+e ~ I V PAEADER = VEL = 3D6.25 1 , ~ !I I ~ ~ ~ ; I
v- i I .I ~ 010 TO LE EL 5 I I I I I .I ~ I r' r 11 ~ +aa 1 1 1 I I ( _ r , W ~ I I LENGTH FOR GRASS. FILTER = L SPREADER = = 0.8 CFS / ~ Q f ~ ~ r } ` GRASS. F ILTER = 13 FT/CFS !r ~ • ~ t ' ` ( ~ ~ 4 ` J r / I / I ,f ~ I
a I I ` I I , J ~ \ \ e°r 1 I1 I II LEVEL SPREADER LENGTH = 1] I 1 1 ~ ~ 1 I ~ I I I , / \ ~ 1 ~`,1 ~ I I I .DER LENGTH = 13 FT (MIN. } ! 1r II 1 ~ I 1 ~I 11 ~ Q / ~ f , ~ y/ jf'~ i 11 II i i ~ Ifi
N I y I p / ~ 1 ~ ~ ~ 1 I , . , I
I m I I ~ I 11 I 1 1 / ~ \ t I 1 1 I I I I I, ~ I 7 1 t I I 7 1 ~ r ' I i
r I' C. I 1 J 1 14 \ I I `1 I 1 , ~ I ~ ~
D ~ I I I 1 I I 1, I f\ i ~ 1 I Ir I ! ! o I i II 1 ~ l r 1 (341.25 1 \ r 1 r
o I 1 ! I 1 ~ P ~ r ~ 1 I 1 / . ,
I I t. I r ~ . ~ j / J
~.J I `
0 1 1 { I I 1 341.2 j r ~ \ i r O ' r \ 1 r I L'~ ~ - ~1 I v c r' ~ 51 rr I I,' 1 © ~
_ J J ~ . ~ W
I ° F LTER 5TRlP t t I 1 I t 1 ~ 1 ~ I j I 1 GRASS. I 1 I r ~ ~ i, r I 1 m fflEFER TO SEEDING I II I ~ / I 1 I I ~f / ~ ~ I ` I I I /
' o ~ , 1 ~ T J J t / ~ REQUIREMENTS ON SHT C5.61 y I I I ~ , \ / ~ ~ J r a I /1 ; r ' . IUJ ~ VV
~ n LENGTH = 50 s i I ~ 11 I ~ ~ ~ 1 I t j r _ I I r T, I / / o W[QTH - 31 I ~ J ! ~ } y 1 I I r . I I ~ I A~ / N OT.CLASS B R[P RAP ~ r r 1 r / r I l U r ' !r r : ~/r 651. } r.;-'~ ~ C~F,•~ c:
~ 1 : ~ I I ~ ! r 1, i ~ a SLOPE 1.5x w - I I I 1 ' 'i I ~~I i I ids - 6) W/ GEOTEXTILE rl ! r , ,r ~ i ~ i c _ --1-- ' j ~ ~ fQyO N
w c I I I I I I I ~ I r / FABRIC ASE r r' 0 1 I I I I I ~ / / ~ / r
1 , n -
~ l I I I I / / 1
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O _ - ~ , ~ a - ~ I M I I~ EVEL SP ADER E M T i / /y~_{,_l
I / i / z c r t l l I „ ~ I I ) i i J o ~a
I I,' J I tV'1 f I J ) 1 1 ~ ;
i ~ [ I I I l II I 1 , ' , r l o ; ,
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t ~ I I I , I~ t I r J / 1 / I o I I I I , , I 1 1 I 1 I I r 1 ~ l / yi' 1 ~ ' ra / ~ , n I ~
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1 I 1 I 1 t 1 r ~ r ! ' ~ . a r 1 U
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~ 1. I I ~ ~ I'i I 1 ) - ~ / - J - 1. 1 I 1 i L 1 1 I i . ~ I ~ I I 1 ~ ~ ~ i lJ 1 I / Z I ; ' h; ~ ~`I ~ y
0 1 1 I I I I I r r , r , r I ~ I ;I I I t r / ~ W
1 \ I I I 1 I I I i ~ r I ~ I I 1 I I 1 I I I r: i ~ r r !
m I: I 1 I I I , 1 J ' ; c r l I I I I• I r 1 ' ~
o , I I I I I' 1 I 1 ~ ~ r o I I I! I r i r ~ 3 / ! ~
, '4 ~ r J I I f I r I I r > r r , o I I r i t l l ~ r ! 1 1
t I c f I I I I I I 1 ! ! I l . ~ !i I !
I I I I I I" 1 ~ ;
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S ° LEVEL SPREADER CONSTRUCTION SPECIF[CAT50NS: kk
f ° ! ° 1. THE LEVEL SPREADER SHALL BE LOCATED OUTSIDE OF THE NEUSE RIPARIAN BUFFER• '~~p~l$q~~~, ~ y
+ 2. THE LIP OF THE LEVEL SPREADER SHALL BE CONSTRUCTED OF CONCRETE AS SHOWN DN
THE LEVEL SPREADER DETAIL (THIS SHEET] AND SHALL BE 3"-6" HIGHER THAN THE ~ RADIUS, TO MATCH m
~ EXISTING GROUND ON THE OOWNSLOPE S1[lE OF THE SPREADER. i ~ INSIDE RADIUS OF r m 3. THE LEVEL SPREADER LIP SHALL 8E INSTALLED AT A 0-0+0$x GRApE (LEVEL! ACROSS ( TYP } : :4 SEAL < : d
I w 5PLITTER BO% - THE ENt1RE LENGTH OF THE LEVEL SPREADER.,' I ~ 4. THE LEVEL SPREADER SHALL BE CONSTRUCTED PARALLEL TO CQNTOUR LINES ON THE
{ TOP VIEW DOWNSTREAM SIDE OF-?HE LEVEL SPREADER TO PROVIDE DIFFUSE FLOW THROUGH THE -I ~ - i .15395 ~ ~ ~
' m FILTER STRIP/RIPARIAN BUFFER. ' ICI I L~ ~ _ ~ ,,~y Q p ;
~ " 5. GEOTEXTILE FABRIC WITH 3"-4" OF #57 STONE SHALL BE INSTALLED 1N THE FIRST 3 0 0 1/4 -THICK ORIFICE - CITY OF DURHAM x FEET FROM THE LEVEL SPREADER L[P ON THE DOWN5LOPE SIDE OF THE LEVEL SPREADER. 1^I I I_I I -1 I =11 I=1 1=1 I~ o a, (,7 0 ~ o
m PLATE I24 X.24 1 PUBLIC WORKS DEPARTMENT • 9" D{A .ORIFICE. 6. THE AREA ON THE DOWNSLOPE SIDE OF THE LEVEL SPREADER SHALL PROVIDE A FILTER u BOLT: TO SPUTTER APPROYEO I I I I I i u~ DRAINAGE AREA = 1.0 AC. ~
G c iNV = 34i•50 . ' A STRIP FOR STQRMWATER DISCHARGE BEFORE ENTERING THE STREAM CHANNEL. ZONE i 010 DISCHARGE = 3.6 CFS -I I (-III III- I I I~ ~z~)a b
z BOX W/ 3 8 D[ GINNER-30 fEET OF THE NEUSE RIPARIAN BUFFERI SHALL REMAIN FORESTED. ZONE 2 ~ p STAINLESS STEEL (OUTER 20 FEET OF THE NEUSE RIPARIAN-'BUFFERI SHALL BE SEEDED AND MAINTAINED SLDPE = 6 677. ~ .DATE FLOW DEPTH - 0.44 FT~ T
~ 9 0 o BOLTS. NUTS ANO _ ENGINEERING DATE ° AS GRASS. .GRASS SHALL 8E PLANTED AND:.ESTABLISHED IN THE OUTER 20 FEET OF a WASHERS. (4 TOTALI PfiDP~ LINING =GRASS IFESCUEI \r~ j ~ .DATE CHANNEL VELOCITY = 2,6 FPS 2,0 ~~CI LI`? A I n I~~~ p
~ FRONT VIEW THE BUFFER PRIOR TD INSTALLATION OF'THE.LEVEL SPREADER. STORM. WATER DATE .DATE PERMISSIBLE SHEAR = 3.33 PSF CL Iv' I ~ v
Y r_nnnwiWl anen 7. THE LEVEL SPREADER SHALL NOT BE CONSTRUCTED UNTIL THE; ENTIRE AREA. DRAINING TRANSPORTATION DATE CALCULATED SHEAR = 1,65 PSF ~S~ ~
VVVY~~~I• ¦~Vr1Y { o TO THE LEVEL SPREADER HAS BEEN STABILIZED DURING CONSTRUCTION OF THE LEVEL ~ DATE W
ORIFICE PLATE DETAIL DATE o - SPREADER, ?HE BASIN DISCHARGE SHALL-BYPASS THE LEVEL SPREADER UNTIL CONSTRUCTION NTS OF THE SPREADER HAS BEEN COMPLETED DATE DATE SECTION A LO~' DO NOT USE FOR CONSTRUCTION N r
i z 6. THE INSTALLED STORM DRAINAGE SYSTEM (INCLUDING DETENTION BASIN NO. 4 AND LEVEL NTS 0 W ¦ 4Q SCALE IN FEET ui IL
l SPREADER) SHALL MEET THE DESIGN SPECIFICATIONS UPON INITIAL OPERATION ONCE
a m THE PROJECT IS COMPLETE AND THE ENTIRE STORM DRAINAGE AREA IS STABILIZED. 9. REFER TO SHEET C5.6 FOR SEEDING SPECIFICATIONS. "5NU 0 10 20 40 60 80 y ~ N
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j\\"..-~ I I ^'?a STORM DRAINAGE CALCULATIONS FOR AREA DRAINING TO LEVEL SPREADER FOR
• . - i\ i GOODWiN ROAD IMPROVEMENTS;
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J \ ~ / I ~ COMPOSITE RATIONAL C _ 0,68
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~4 aj..--- I ° ON (110AISCHARGE 2.4 CFS
o LEVEL SPREADER FILTER STRIP 50 FEET OF GRASS AREA
Qk1~ FI I LEVEL SPREADER DE51GN = 13 FEETICFSAF DISCHARGE ~
_ , _ i . , ~ , ~ \ ` \ \ \ ~ \ ~ \ ~ 355 F' v~ r NO Q
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EVELSPREADER FOR ' Q \ \ 1-_ ~ ~ ~ /
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ALL CONSTRUCTi~N SHAlL BE ~ . ANCE -WITH CITY OF DURHAM AND NCDOT STANDARDS, ~ TEMPORARII BENCHMARK: BNK CONIRQL IRON PIPE , RDS,' SPECIFICATIONS AND- DETAILS PIN: os35-nna~2~1161 AND 0635-oM63-414
, m N -.852;666,6@76 E - 2,036d~:1712
I EL - 349.3Y I
y.,, a. 7 15" RCP. TO FES 66
INVERT IN ="305.20' "
18" RCP TD 'i INLET 143 LEVEL SPREADER LIP INVERT OUT = 305..00' f~ a EL. = 305.30` a
LEVEL SPREADER LIP INVERT [N = 34t.50' EL. = 341.50' K ~ TOP OF WEIR = 342.50' CLASS r,B" AlP-RAP "B" A1B-RAP ~ .TOP OF WEIR =:.305,80`
- INVERT OUT - ~ (D50 = B") wl Gf07E ~ CLASS B RIP-RAP. v ~ 18" RCP FROM FABRIC BASE = B°! w1 GfOTI:XTILE FLOW PATH C BASE 3".LAYER OF
G 1 (D50 = 6 1 w/ GEOTEXTILE FLOW PATH 3" LAYER OF u+ ` INLET 141 FABRIC BASE ' # 57 STONE. GRASS ~OL.~^ DR1F{CE PLATE FOR
i n 57 STONE LNVERT IN = 341.80' GRASS 6.0', DIA. SPLITIER.BOX , . FILTER 1,0 IN/HR STORM TO STRIP 15° RCP TO LEVEL. SPREADER
" ~ FILTER INVERT OUT = 341:50 (SEE NOTE 11 , STRIP INVERT = 341.SO' LEVEL SPREADER iSEE DETAiL:THIS SHT1 ~ ,
• , TOP = 346.00' , ao5:oo` t4LF ~ 1.43y. 011,0 IN/HRI = 0.6 CFS
' 341.25' , 3 FT. WIDE INVERT IN 305.20': ORIFICE DIR. = 6" STRIP OF INVERT OUT = 305.00' ORIFICE INVERT = 305.20'
3 FT. WlOE ` CHANT ORIFICE PLATE-FOR STRIP OF 1NVJ. CHANNEL FILTER FABRIC 010 WATERLEVEL =.306.25' 1NV. = 304.00' 15" RCP .FROM 010 TO LEVEL SPREADER
CHANNEL FILTER FABRIC 1.0 INlHR STORM TO INV. =.341.00' 15" RCP TO LEVEL LEVEL SPREADER APPROPRIATELY S[iED INLET 64 CONCRETE FOOTER = 0.8 CFS
t APPROPRIATELY SIZED C NCRETE FOOTER SPREADER (SEE DETAIL THIS SHTI INVERT IN = 305.60 ` INVERT OUT = 305.20' 4,0` DIR. SPLITTER BOX
14LF ~ 1.43x ~ 0(1.:0 [N/HRJ = 1.7 CF5 r INVERT IN = 34 1:50' ORIFICE [)IA. = 9" 1SEE NOTE 1)
i INVERi OUT = 341.30' ORIFICE INVERT = 341.50' } TOP = 310,00` ~ HARVEST GROVE DR, n ~
GOODWIN ROAD INVERT = 305.20. 0 CONCRETE IEVEL SPREADER.. DETAIL ~ ~ a
I p D DETAIL CONCRETE LEVEL S REA ER NTS ~ ev U
I NTS a NOTE ~
I NOTE 1. INSTALL 2' - 0" OF BA6CAST CONCRETE IN BASE OF SPLITTER BOX: W ~ ~ Z ~
1. INSTALL 24" OF_BALLEST CONCRETE IN BASE OF SPLITTER:=BOX. FfARVEST GROVE DR. ~ W y W o
GOODWIN ROAD SPLITTER BOX DETAIL Z ~ a u,
SPLITTER X DETAIL RADIUS TO MATCH INSIDE RADIUS OF NTS W ~ o
NTS SPLITTER BOX.... Y zW Q
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~ 1 6° DIA ORIFICE BOLT TD SPLITTER !r r i i ~ _ / a ~ . t INV. - 305:20 „ r r 1 i ',r 1 ~ .I 1 ! 1 ~ luN~~ 1 ! 1 •i I r ~ C
~ BOx w/ 3-8 DIA r r ~ U u. ~ ' .w~N ~ t} STAINLESS STEEL r I ~ i r ~ 1~ r i ! t! rn-°p
r o 0 BOLTS, NUTS 'AND ~ \ ~ t r 1 ~ S ~ ~ LEU~L SPREADER/ BYPASS i ~ ~l ~ 1 I !1 ~ - ~ pD w
` _ _ _ I ~ .t WASHERS. (4 TOTAL 1 1 1 _ _ r - ~ ~'~ti, - ~ I FAONT VIEW f 1 / l , r / ~ SY,STEM EASM T ~ 1 I I: I ~ i i~l ~ ~ 0 W
~ ,
r `1, t w _ / HARVEST GROVE DR: , ! , , , ti` ` \ a ~ ~ / r i / / ' ORIFICE PLATE DETAIL , / / ~ ,
o ~ ~ ~ ~ ~ - ~ NTS I I i J ~ , . , ~
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\ ~ \ ~`z. ~ / ~ \ \ ~ i f r ~ ~ 1 ~ r , 3Q / 1 ! / ~ I I EASM'T / i . . I ~ ~ ~ ~I! /
\ ~ SPLITTER BOX. ~ ! I r i ; ~ ~ , t ~ 9, •\1 _ fSEE DETAIL THIS SHTI ~ 1 1 r / ! - ! ~ I1 ~ 1 i / ~ ~ ~ ~ / ~
\ GRASS FJI - a ,ar 1141. +~..A4, ~ } iA1111A1 Y ~i !in SJ ~ J i. ~ V>~ \ - - ~ `\'°~l ifP~~, .di u~ n<~. 1t1,~ ,,.tt}ittt 1 / / i / (REFER TI ~ GRASS F}CiER STRIP ~ ~ O G I ~ ~ ji O ? ~ m
~ ~ > ~ ` `"s t ~ 11 ~ r , , / REOUIREMI `i ~ , RE U pEMENTSE0NN5HT C5.6J ' ~9~ Il,.!~ a \ ~ - 1 ~ I
. a , ~ ~ \ \ t ~ ~ \ t 1 . / ,LENGTH = ~ ~ , ,LENGTH = 50 ~ ~ . ~ f ~ ~ r'1 ! ! ! 1.
_ ~ ~ , 1 / / ' / SLOPE _ i' SLOPE = 3..337. ,!i ~ ' { ; t ~ \I l 1\ I /
I LEVEL SPREADER-0ES1 1 / / ~ r iJ \
DETA THIS SHEET / (SEE IL t J t I Q(1.0 IN/HRl = 1sT CFS I \ t ~
y :010 WATERLEVEL = 343.10' ' I ~ ~ 1 ,i _ j , i / Z ~ /
NN ~ . O10 TO LEVEL SPREADER = 2.4 CFS ~ I ~ / I ~ ` } ~ r / N LENGTH FOR GRASS FILTER = 13 FT/CF5 ~ ~ ~ ~ \ '
i. ~ LEVEL SRREAOER LENGTH = 31 FEET ~ ~ ~ \ • ~ t 1 ~ , ~ o ` , t ~ a Vi i/ I t
i L ~ - / ( Imo. ~ \ y ~ } 1 I /
c / / / ~ ~ / / ! I ! 1 ~ tr d

LEVEL SPREADER D ~ (1.0 IN/HR1 = 0.6 CFS c ~ 1 I I \ cR 0ES IGN vl j Il \ ~ I I1 n ~ `lJ ~ ~ ~ i 1 z ~ ~ 0,6 CFS ' 1 \ j 1 II I/~,.0 ~~~i I l~; C9 C
L I I i , I I s. r I / I \ \ 1 ~ \ I 010 WATERLEVEL = 306.25 / .L = 306.25 ~ !r ~ ~ I II I J ~ ~ ~
I; v i I I .I ~ 1 / I ~ \ a~ 't t .I I 010 TO LEVEL SPREADER = I 1 i ~I c r jr 1 W ~ - as ~ 1 ~ I I LENGTH. FOR GRASS FILTER = t SPREADER. = = O. B CFS 1 . , ~ 1 , ~ i 1 `ti m w 2ASS F [LTER = 13 FT/CFS 1 11 ~ ~ ~ I 11 ' 1 ~ I I I ~ ~ Q I~
~ I ~ I r, ~'i\ 1 / ~ ~ ~a }t t I 11 LEVEL SPREADER LENGTH = 13 .R LENGTH = 13 FT 1MlN.l ! 1 Ii / I ! I ~ i ~ 1 u!
I 4 I
' m I I 1 I 11 1 / ! ~ ~ 1 ~ I I I 1 I I I I 1 r / ~ c I t I
I / ..r ` t 1 r 1 1 i I 1 1
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~ ~ ~ , o i 1 ( 11 I i i 11 11 \ I / !1 \j~? \1 ~i. r Il ~ .i
~ GRASS FILTER STRIP I I 1 ~ r` + / 1 I \ I I 1 / / ` \ 1 , r 1 , ((Y1 r I 1 ~ ~ ,
' m (REFER. TO SEEDING I 1 / a ~ ~ t I I I \ 4 r l ~ l I I / f ~ RfOUIREMENTS ON SHT C5.61 I 1 I I ~ ~ I ~ , ~ / r . ' . ~ \ I rl 1 ' ~ I i I U.- ~ n Wpb}Z
~ LENGTH = 50 I ~ i j I r r j, ~ ~ l I 7`. I ~ ! I ! i ~ 1 I 1 1' 1 'I ~ ~ 1 1 „~O ~ Q 1 ~ • k ~ . 651 1 1 ~ D ~ F, G c
o wIGTH ° 31, I I I / , ~ ~ I r / i I: ~ ~ 1 1 I i 1" + ~ 1 i ~ N OT CLASS_B RIP RAP r r I l ' ~ ~ SLOPE = 1.5x I I 1 ~ ~ li I / r 1 i - (d5 6"I WI GEOTE TILE I l i
vl a ~ ~ I I , 1 w c I I 1 I I -'I I i / FABRIC ASE 1 1 / J i 1~ ~ ~ I ~ `f ~ , ur II
1 I 1 I / _ r 1 i it ~ ~C{ ~ t 1 I / / IJ~
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~ LEVEL SPREADER CONSTRUCTION SPECIFICATIONS: y ~ ~ ~
t ~ I 1. THE LEVEL SPREADER SHALL 8E LOCATED OUTSIDE -0F THE NEUSE RIPARIAN BUFFER. ~~~+nnnnrr~t ~ y 2
- 2. THE LIp DF THE LEVEL SPREADER SHALL BE CONSTRUCTED OF CONCRETE A5 SHOwN ON O ~ A~j y~~i.
THE LEVEL SPREADER DETAIL (THIS SHEELI AND SHALL BE 3"-6" HIGHER THAN THE ~ RADIUS TO MATCH EXISTING GROUND ON THE DOWNSLOP[i SIDE OF THE`SPREADER. o y. ~ a H
I ~ INSIDE RADIUS. OF 3, THE LEVEL SPREADER LIP SHALL BE INSTALLED AT A 0=0.05x GRADE (LEVELI ACROSS ITYP) ; U
i ~ SPLITTER BOX THE ENTIRE LENGTH OF THE LEVEL SPREADER. I ~ 4, THE LEVEL SPREADER SHALL BE CONSTRUCTED PARALLEE TO CONTOUR LINES ON THE ! _ - 15395 ~ o ~
t TOP VIEW DOWNSTREAM S[DE OF THE EEVEL SPREADER TO PROVIDE DIFFUSE FLOW THROUGH THE _ _ ~ W
y FILTER STRIP/RIPARIAN BUFFER
~ 5. GEOTEXT[LE FABRIC WITH 3"-4" OF tt57 STONE SHALL BE [NSTALLEG IN THE FIRST 3 4 ~ ~ 1/4" TH1CK<ORIF[CE - CITY OF DIJRHAMA I ~ FEET FROM-THE LEVEL SPREADER LlP ON THE DOWNSLOPE S[DE OF THE LEVEL SPREADER. - PUBLIC WORKS DEPARTMENT .~11, ~ 1-111 i ..,,,~o o~, ~ a a z
PLATE (24 X 24 1 6, THE AREA ON THE DOWNSLOPE SIDE OF THE LEVEL SPREADER SHALL PROVIDE A FILTER 9" OIA ORIFICE BOLT TO SPLITTER APPROVED 1.11----III I I- I -1 I I DRAINAGE aREa = 1.0 AC: ~ 0
~ _ n STR]P FOR STORMWATER DISCHARGE BEFORE ENTERING THE STREAM CHANNEL. ZONE 1 :INV. 3d1 50 BOx W/ 3 8 DIA 010 DISCHARGE ='3.8 CFS _I I I-_~ I I I.I. I I ~ "'t J29~d~ U
z t[NNER 34 FEET OF THE NEUSE:RIPARIAN BUFFERI SHALL REMAIN FORESTED. ZONE 2 ~ o STAINLESS STEEL (OUTER 20 FEET OF THE-NEUSE RIRARIAN BUFFERI SHALL BE SEEDED ANG MAINTAINED DATE SLOPE = 6 67y Q` )ATE FLOW DEPTH 0.44 FT. ~ Q
o 0 o BOLTS -NUTS AN0 ~ `ENGINEERING ~ AS GRA55. .GRASS SHALL BE PLANTED ANO ESTABLISHEO IN THE OUTER 20 FEET OF a~. ~ WASHERS. (4 TOTAL) PROP. LlN[NG = GRA5S tFESCl1EJ ' LL )ATE CHANNEL VELOCITY = 2~$ FPS 2,0~ Q
~ FROM VIEW THE .BUFFER FR[OR TO INSTALLATION OF THE LEVEL SPREADER, STORM WATER- DATE PERMISS{BLE SHEAR = 3.33 PSF ~ P R E LI M \RY IATE CALCULATfO SHEAR = 1, B5. PSF
~ ~ Y cnnnwlN~ onen : 7. THE LEVEL SPREADER SHALL NOT BE CONSTRUCTED UNTIL THE ENTIRE AREA GRAINING TRANSPORTATION DATE
VVVV\~II\ IlV1'}V { o ~ TO THE LEVEL SPREADER HAS BEEN STABILIZED DURING CONSTRUCTION Or THE LEVEL IATE l~Q DO NOT USE FOR CONSTRUCTION I y
ORIFICE PLATE DEVIL DATE 0 _ SPREADER. THE BASIN DISCHARGE SHALL.BYPASS THE LEVEL SPREADER UNTIL CONSTRUCTION x NTS OF THE SPREADER HAS BEEN COMPLETED DATE ATE SECTION A - c~
` z 8. THE INSTALLED STORM ORAINAGE:SYSTEM (INCLUDING DETENTION BASIN NO. 4 AND LEVEL NT$ ~0~; SCALE IN FEET W O
SPREADER) SHALL MEET THE DESIGN SPECIFICATIONS UPON INITIAL OPERATION ONCE
to THE PROJECT IS COMPLETE AND THE ENTIRE STORM DRAINAGE AREA IS STABILIZED. 9. REFER TO SHEET C5.6 FOR SEEDING SPECIFICATIONS. W o 0 10 20 40 60 80 y N
iY
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6 . ~ --X ~ j ~ I, , ~ ~-X 1,~ J l / '1•~ I I 1 rn ~ ~~~=111 ~J ~ 8 [
I Asa X / / / I ~ _ 9 ~ , ss .~-X : 21,E ~ / / ;
366 ~ / 9 I ~ ~ ~ 1 1 ~ { j
/ I ~ D C~ ~ I, I t 1 ? i,~ t , ~
11 I \ ~ ~ ` ~ ~ t ~ ~ Il I / / ~ 1 1 ti 1 I ~ ~ /
~ ~ 'U 1 ~ j\, r ,
i 1 / I ~ x - r ~ I/
~ JI
1 ~ 1.19 Fqs _ SpQ ~ ~ ~ / J
I P6 MME R ~ ~ ~ ~ 1 I ~p Nr 368• ~ ~ _ ~`1 / , ~
r r
I t L ~ ~ Fk ~ ~ J 3j3- - 1 ~ /
I ; SgNfr, GlTy y
X ~ `f / % / 1 i I 1 \ \ /
I f r ! IQ A ~ ~ ~ ~i i ~
l~ / 1 it I N ~ \ I
I L ~ m J , 1. ~
~ ~ k o r ~ " 't , ~ y~~ 11 I ~ ~ \ ~
i . I ~S' r / I i ,1 A KF ~ i
k / ~ / r b \ 1, ~ \ ~f ~ 11 1~ ~ `S14f ~ ~AS~R'~AIN \,ll iP'--'~~ \r ~ \
r /
I ~ / ~ ~'i r' r Cvit \ / ~ i ~
I ~1 k / I V r r \
I ~ ~ ~ 0 Q T
M k ~ I ' ~ / ~ Q '•V ~ ~r ~6 rr 1 \ ~ f ~
' 1 ~ ~ ~ ~ STORM:DRAINAGE CALCULATIONS FOR AREA DRAINING TO DETENTION BASIN N0.5: ~ r ~ ~
/ f ~ 1 I+~V Rip. ~ Z'I ~ / I r~
/ ~ . 4 r ~ DRAINAGE AREA TO BASIN. = 8:7 ACRE5 I ~ O ; ~ ~ ~ COMPOSITE RATIONAL C D.60 1 1 J e. 1 ~ I
I 1.0 INIHR I ~ ~ . ~l lNT
/ / ~ ! / , , `t 1 ~ t? lsrr 1 ~ i ~ ! ~ /
9. _ 5.2 CFS I ~ r ~ / DISCHARGE (4 FQR 1.0 INIHR) tNV RCp - i_ ~ 1 t r ~ /
I ~ ~ rte. L 1 , ~ ~ ~ i~
~ / I ' ~\f .l FLOW INTO BASIN $ASED ON • 1~ / INV „ 3?9.09, 1' 11` ~ 1, ~ 1! / / t
I J r,,' I 1.0 INIHR INTENSITY = v.2 CFS I ~ r ~ FLOW OIJT OF BASIN AT 1t0 INIHR. i 1~,~ ~ Y I l ~ I, I11 1 1 ~ ~ /
t ~ Jar ,
- INFLOW TO BASIN (BASED ON ' r RESULTS OF ROUTING CALLS) = 0.3 CFS I ~ \ ~ ^r~ ` l
+ ~ I - ~ ! ' J , 1 NV , ,U , , 1 ~ ~ f
1 ~ ~ ~ ADER BASED ~ 1 FLOW TO LEVEL SPRE
I ~ ,1 - RGE = 1.3 CFS ON Q10 DISCHA 1 ~ I ~ r
•I ( L~ I, it 1 ~ /
~ _ FILTER STRIP = 50 FEET OF GRASS AREA 1 ~ LEVEL SPREADER - ~ ~ ~ : = SCNARGE
~ ~ . ~ 1 LEVEL SPREADER DESIGN. 13 FEETICFS OF DI ( C' ; ' ~ _ 17 FEET _ ~ ~ 1 _ LEVEL SPREADER LENGTH {MIN)
r Nl,~ !t /
I 1 ' / -
- - I ~ / L ~
/ . ~ -
UYNIIV 4RV~7JIIYV ~7VDUIY171VIY f
i ~ y ~ ~ ~ , ~ ,i I 1
r ` ~ / ( / ITV LEVEL SPREADER FOR
~ ~ I ~ ~ ~ l ~ 7g„ DETENTION BASIN'NO, 5
f
1 \ ti I ~ ~ ~ ~ L1 i \ ~ ~ o"NnS~oRM SCALE: 1" 50' I
~ ~ ~ ~
~ i I , ~ \ l l , 0 8 0 SHEET LS-5
I ~ ~ 1 ~

'
s ALL CONSTRUCTION SHALL BE ANCE WITH CITY OF DURHAM AND NCDOT STANDARDS, SPE ~ r TEMPORARY-9ENCHMARKt:BNK CONTROL R1oN PIPE IRDS, RPEGIIaCATIt?NS AND DETAI S p~~u: oe3~-a~2-~1s~ Anon oa3~-aa~?~-~z~a
G. m ' N - 852,666~667b SEE TRASH RACK. E - 2,036,1Y3.2'J72 I,
, 349,Ry iSEE DETAIL THIS SHEETI . a.
80UYANCY CALCU ~ ~ ERIBARREL 1
roP of eERM Goodwin Crossing - Detent,on Basin No. 5 ELEV. 353.50
LEVEL SPREADER LIP . a EL. = 3471QO'
~ ~ 4 FAIRCLOTH K MMER e ' ~ R EouAL. cATTACHED. To Rls r Inside plameter ft : 5.0 „ „ ~ ~ ORIFICE DURING CONSTRUCTION. CLASS B RIP-RAP
_ Riser WallThickness m : 6 IDSO = a°) w/ GEOTEXTILE „ a SKIMI~R TO BE REMOVED AFTER , FLOW PATH „ w FABRIC BASE 3 .LAYER: OF
SITE STABILIZED AND REMOVAL. POnd BOttOm EleVatlOn ft : _ ,347.00 # 57 STONE II ~ z APPROVED BY DURHAM COUNTY 95x GOMPACTEff GERM a EROSION CONTROL ENOINEERI RlserCrestEleVatlOn: ft): 350:80 # 57ASTONEF GRASS .FILTER
~ ~ ~ sso,eo Dens of Riser Mad lbl : _ :150:00 • STRIP.
i 5' PRECAST. • Pi a Inside: Diameter in : 30
~ MAN© SECTION 346.15' 31 LF Pi a Wall 711ickneS$ in : ; 2.Z5 3 FT. WIDE
' 30" RCP ~ @ 1.081 ~ ~ Len th of Plpe osed tt~: _ `10.00 CHANNEL.. f STRIP OF ' FILTER FABRIC
• [NV. = 346.50` Dens H2OIbl 62.40 PROPRIATELY SIZED
APPROPRIATELY Sli CONCRETE FOOTER . . ~ Volume H2QDis laced b Riser 107.44 I. NCRETE FOOTER ~
~ ~ Wei ht H2O Dis 'laced b Riser Ib : 6704.41 LEVEL SPREADER CONSTRUCTION SPECIFICATIONS:
15' TYP. e' Volume HPO Dis laced b Pie : 68.74
Wei ht H2O Dis laced b Pi a (Ib): 4289.12 .f 1. THE LEVEL. SPREADER SHALL 9E LOCATED OUTSIbE OF THE NEUSE RIPARIAN BUFFER. I ~E,r,~L 2• THE L[P OF THE LEVEL SPREADER SHALL BE CONSTRUCTED OF CONCRETE A5 SHOWN ON ~ 0 0
~ Total<U lift Force. Ib : 10993.53 C~ONCRE'FE LEVEL SPREADER DETAIL INV = 347,00 . . e• . NTS THE LEVEL SPREApER pETAII (THIS'SHEETI AND SHALL BE'3"-6" HIGHER THAN THE ~
. BgqLLA'ST• . ~ ° ~'tiONCRE?E e°v EXISTING GROUND ON THE DOWNSLOPE SIDE OF THE SPREADER. 3. THE LEVEL SPREADER L1P SHALL BE INSTALLED AT A 0-0:05'X GRADE (LEVEU ACROSS O
~ ~ ~ : , ; . ei ht Riser Ib : 4924.45 i ° : ° . ° DURHAM STANDARD PLASTIC . < . , . < . • ~ • ~ STEPs a 15' SPaC[NG, Wei ht of Pi a lb : _ 2947.29 THE ENTIRE LENGTH OF THE LEVEL SPREADER.
~ i m. ~ ALIGN WITH TRASH RACK I ~ , 4. THE LEVEL SPREADER SHALL BE CONSTRUCTED PARALLEL TO CONTOUR LINES ON THE W ~ O p
" ~ ~ PlpelRlser Downward force (Ib): 7871.73 HATCH. DURHAM STANDARD PLASTIC >r~P R P ' DOWNSTREAM SIDE OF THE LEVEL SPREADER TD PROVIDE DIFFUSE fLOW THROUGH 7HE ~ W a ~ y FILTER STRIPIRIPARIAN BUFFER. ~ ~
STEPS DN THE OUTSIDE. OF 5. GEOTEXTlLE FABRIC WITH 3"-4" OF #S7 STONE SHALL BE .INSTALLED IN THE FIRST 3 ~ ~ w O
MANHOLE P 15' SPACING, ' ~ a" DEEP WASHED TUNE Iaallast Concrete: ALIGN W[TH TRASH RACK Minimum Factor of Safe 1.25 FEET FROM. 7HE LEVEL SPREADER LIP ON THE DOWNSLOPE SIDE OF THE LEVEL SPREADER. ~ ~ fi - 6. THE AREA ON THE OOWNSLDPE SIDE OF-THE LEVEL SPREADER SHALL PROVIDE A FILTER ~ ~ ~ W 4
HATCH; NOTE: _ R wired ballast thickness (in) 23.92 STRIP FOR STORMWATER DISCHARGE BEFORE ENTERING THE STREAM CHANNEL. .ZONE 1
' CUTLET STRUCTURE ~ETA~I. i. -RISER STRUCTURE SECTION SHALL PrOVlded Ballast Thickness In : 24 (INNER 30 FEET OF THE NEUSE RIPARIAN BUFFERI SHALL REMAIN FORESTED. ZDNE 2 ~ ~ Q
BE STRAPPED TOGETHER WITH - NoT i0 SCALE STAINLESS STEEL STRAPS, Total Downward Force (lb : - 13762.22 (OUTER 20 FEET OF THE NEUSE RIPARIAN BUFFER) SHALL BE SEEDED AND MAINTAINED ~ YI~~,~?~ - AS GRASS:. GRASS SHALL BE PLANTED AND.ESTABLISHED IN THE OUTER 20 FEET QF ~111_~ ~ ~ d
2, RISER/BARREL SHALL BE GASKETTEA ProNdedFactorofSafe 1.25 d THE BUFFER PRIOR TO INSTALLATION OF THE LEVEL SPREADER. Iii ~y;~
~ Q-100 WATERLEVEL BASED ON STARTING ROUTING CALCULATIONS JOINT .PIPE AND EACH JOINT SHALL ORIFICE BLOCKED.. W APP WITH A DOUBLE-LAYER r ".THICK ORIFICE PLATE. (24" X 24") CONCRI ~ WI?H_WATERLEVEI: AT TOP OF RISER AND BE R EO /4 HEaowl CONCRETE 7, THE LEVEL SPREADER SHALL NOT BE CONSTRUCTED UNTIL THE ENTIRE AREA DRAINING F•iri TO THE LEVEL SPREADER HAS BEEN STABILIZED DURING CONSTRUCT [ON OF THE LEVEL ~ C ~
DF NON-WOVEN FILTER FABRIC. eoLT zo HEAflwaLL WITH HEADWALL SLOPE AS ~J'n ~ to W Si (SEE DETAIL INDICATED SPREADER+ THE BASIN DISCHARGE SHALL BYPASS-THE LEVEL SPREADER UNTIL CONSTRUCTION V
~ 3/a' DIA: STNNLESS STEEL ISEE OE v SHT C5 q „ BOLTS, NUTS W/WASHERS. (4 TOTAL) SHT C5:71 ON PLANS OF THE SPREADER :HAS BEEN COMPLETED ~ ~ ~j p Y THE INSTALLED STORM pRA1NAGE SYSTEM (INCLUDING DETENTION BASIN NO. 4 AND LEVEL Q ~ G G
a OTEr /e STrUNLESS , N STEEL BOLT (TYP) SPREADERI SHALL MEET THE DESIGN SPECIFICATIONS UPON INITIAL OPERATION ONCE w~~ 5" DIA ORIFICE ~ ~ Q
REFER TO SHT C5.3 FOR DAM EMBANKMENT ` 5'~ DIA: (INV= 347.00'1 THE PROJECT IS COMPLETE AND THE ENTIRE STORM DRAINAGE AREA IS STABILIZED. ~ a 9. REFEfl TO SHEET-C5.6 FOR SEEDING SPECIFICATIONS.
CONSTRUCTION STANDARDS AND THE TESTING • ORIFICE. w _ OBSERVATION AND CERTIFICATION REQUIRED IINV. • 347.00')
U FOR DETENTION BASIN CONSTRUCTION.
~ _ ~ ~ " 15" RCP Y+ uJi Q "w OUTLET PIPE ~ a ~ m
° a I°n .r li 3'X3 X4 ,I ~r r; CONCRETE - o NOTES: ' ~ a am Z~~~~
PAD AT BASE OF ~ • • ~ ' ALL REBAR SHALL 8E #4 REBAR HEADWALL (CENTERED dC~ s~~!~
ON ORIFICE PLATE). ~i ALL REBAR AND ANGLES SHALL BE GALVANIZED W[TH A B1TUM[NOUS COATING. Mr~~ MR7w~ W V tDP7Fa • •
NEEHA - NEEHAH R-7512-Bi CAST IRON PIPE
I ~ ALL POINTS AT WHICH TWO SEPERATE PIECES OF REBAR COME TOGETHER ORIFICE PLATE DETAIL SCREE SHALL BE WELDED THE ANGLES SHALL BE WELDED TO THE ASSEMBLY AT NTS SCREEN FOR 12" PIPE ANCHOR TO , CONCRETE PAp USING STAINLESS
VARIES DEPENDING ON coNC~ LOCATIONS SHOWN ANO SHALL REST DIRECTLY ATOP THE RISER. STEEL ~ MANHOLE WALL THICKNESS STEEL BOLTS, NUTS WlWASHERS.(4 TOTAU
THE HATCH SHALL LINE UP 0[RECTLY'ABOVE STEPS WHICH SHALL BE INSTALLED
ON THE. INSIDE OF THE RISER. ACCESS HATCH .WITH
~-FABRICATED HINGES TY RHAM THE HATCH_SHALL BE SECURED WITH A CHAIN AND:A.LOCK. THE KEY. SHALL. C OF DU W
5'LD.PRECAST ~ ~ BE WELD IN POSSESSION OF'THE PARTY RESPONSIBLE'FOR_MAINTENANCE OF PUBLIC WORKS DEPARTMENT ' MANHOLE R 3.5.0 THE POND. APPROVED
. U
v 2" X 2 X 0,25 R Spy R DATE ~ ~ y ~ ` ~ ~ ~1 I~ ! I 1 V ftil I ~ /I r 1 I I I II I I 11 I r~
ANGLES, TYP (4) ENG I NE E ! NG ~ ~ ~ ~ N . ~ . t R STORM WATER DATE 'y r.-~ 4lyl I I r Q- ~ f ff / I I I 1 I ~I I~ 0 I I 1 I ~ ~Q y r ~ ~ 1 1 I 1 IY7 ' i t Il ll 1 ~ I I I I R I I ` i n I 2 z
1 0 / y y ~ n y s # 'SQ, 2" X 2" X 0.25" ANGLE TRANSPORTAT [ DN DATE ' y y In ~ ~ l I P r I I I f I g I I I 1 1 0 ~ p ~ ~ ~1 t ~ I I 1 f r t I r I I i II NCDOT 9NOWALL I ~ I 1 I z ~ Z
~ -y ~ 'P - DATE y} ` y ~ ~ I r r I r I t I t r r f r II (SEE 0 q'A[L SINT C5. r 1 I I ~ I D O H ~ ~ I I I r i t r i I I I i Cr3 I I I F~
, ~ y , c O 7 y ~ ~ sa: DATE y c y `i I N j r 6ENCING d L:lMITS, ~.`h. l ~ lr Ir ( f f _I ~ ~i II ( I ~ ~ t7
i p ANCHOR TRASH.RACK i0 MANHOLE WALL YNTH FOUR y y y , t 1` ' I AFj DIST~IRBANCE (?YPl ! .l\` I ~ I i I (h g~ I U~ I U I ! i a I I 1 v ~ ` t 1 r I ( I 1 I I Z W
l; p - EQUALLY SPACED GALVINIZEU STEEL CLAMPS, CLAMPS \y ' I I 1 J f- ~~4~ ~ , I I I i, y , CI 1~
'I E 10° TYP. SHALL BE'ATTAOHED TO THE MANHOLE RISER-BY 2° X li L b , o RETE ANCHOR BOLTS, I ONC y~ ' I I , 1 II f I 1 I I I 1 ~I ~ I ~ V t.`~ I 120' STORM I RA[NAGE 1 ~ffj i
w 0.5 C t . , ` ~ , ' i ~ I I I r `1~47r I ,EASEMENT ' ~ /1 I w W I t I M LEN TH = 50 (1N.) ~ I ~`y` I , I ~ Q
y , 'r, o TRASH RACKSECURING TRASH..RACK DETAIL ~ I i i WIDTH = 17 (M N.! r I ~ 12 I I. I I E,, ~ I 1 ~ SLOPE = 1.5y , ~ I 14~ 1''~ 0 I I 1 ~ ! u'1 y I r I 1 I G
_ _ 1 ~ y `1 I ~ j ~ (f I I I o ~ ~ STORMWATER
y COI i y / I - o { y ; A Dt~ ~ CONCRETE LEVEL SPREADER I I I ~ ~ BMPIEASEMEN7 l r ISEE DETAIL THIS SHEET! I 346.75 I ~ I 1 I I~ ~ 0
1 " t t LD pti A 0(1.0 IN/HR1 = 0.3 CFS I I I 4E.5 ~L.~ ' r II I Z Ljl O10 WATERLEVEL = 35:1.Si' r I I t I I
o I y ~ t 011 Of0 TO LEVEL SPREADER = 1.3 CFS II; i I I I ' ~ SrORZ# oGp I I I m ~ FILTER STRIP-= 50 GRASS
tl n 400~PSI MONOLITHIC,CONCRETE_CRADLE 4000I?SI MONOLITHIC CONCRETE CRADLE ~ ~ ~ ~E! ~ UNDER FULL LENGTH OF PIPES CONCRETE UNDER FULL LENGTH-0F PIPE. CONCRETE I I LE' LEVEL SPREApER DESIGN = t3 FT / CFS~~( I I 346.75 ~ I ~A(~ I I (A LEVEL SPREADER LENGTH = t7' (M1N) ; a I I, I II q-, ~ I } ~ Q
I' '0 5WALL BE P-2.5' SLUMP. CERTIFICATION 2' 2` SHALL BE 2-2.5' SLUMP. CERTIFICATION i,- I t T01 1 JTOP///316.50. I 1 I i i I 1 11 ~\`I , r I i F- Q GG.
~ ~ 2 2 I THAT CONCRETE MEETS THESE. THAT CONCRETE MEETS THESE i` W ~ ~~39 LFI l5' RCP Q 1 09% I I i I 3~~1 I I 353.5 I I~ 12 I I ~ CaC
D 3D" PECIFICATION'S SHALL BE PROVIDED T0, .'15 SPECIFICATION'S SHALL BE PROVIDED TO ~ r S ~ U
RCP _ P P W TH ° ° , q . RCP .'o THE OWNER. PLACE UNDER PIPE WITH Ii< 0~, C e . ` ' ~ e•. ° ` THE OWNER. PLACE UNDER , I E I a . e . q e 'e y - ° a a a ° e I -i " . , . • a • q . HAND EQUIPMENT AND VIBRATE a q',:c`. ~ HAND EQUIPMENT AND VIBRATE I I i / 1NV QUT 346. ~ I I I I .1~ B I N
~ •,a ~.a . ° ° i, • ~ ° . • F R NSOLIDATION, FINISH ° `.q INTERNALLY fOR CONSOLIDATION, FINISH + I i ~ + m a INTERNALLY. O CO + I r , r' , I' 3~ 1 3y3 r I Q / / } I ~ h
° J` a a ,a' ~ • e a c t SHALL BE ROUGH .PLOWABLE FILLS, n~'• q q ~ . ~a ' ° . ° a a SHALL BE ROUGH .PLOWABLE FILLS, I i F. m S q I
° e"~ ° ~ ` a a SLURRIES, OR OR GELS. ARE NOT , a"..°'~ • , . .'q'• .••e q`. •~`•,'q SLURRIES, OR` OR GELS ARE NOT I + ~ ~ : o a ° .`q PERMITTED. ° ' PERMITTED. + NCOOT ENDWALL ~ 353.5,1 ~ t 3G~r( ~ Q /i (SEE DETAIL SHT C5.71
i, } ~ q ° a " e c a ° ° ° ° ° ° ° a ° + r NCOOT$CASSBRI COOT~CCASS B R1P RAP, r'~p, , ~ ~ r Q t»
e a ° ° I 1 (050- 6- 1 22-' p li C ',e` „'r ' a~ a• a`• ' a`, ~ e~ . , a` q•. • e• q• q• G• I , D50 = 6"1 22' DEEP ~1 ~ tl ~I ~ D
;I , • t WI GEOTEXTILE FA I o ~ y L = 15 / GEOTEXTILE FABRIC BASE , ' ~ ~ ' j I ~ m - t5 A ~ ~ z
Ifl N - y . I W = 7.5' TI N B B E S TION A-A I EC 1, ~ o 'I I = 7.5' • ~ / } `I ~ I NCDOT BNOWALL ~ z W ~ ~ r I I I DWI 5' DIA ORIFICE
~ r 37 LF 30' RCP Q 1.08% ~ ~ I ~ , ORIFICE INVERT 347.00 M 0! W Q
~ t _ 2 2 + - - ~ I ~ ~ I a~ / ~ / INV OUT.' 47.00 11 At ~y ( >rSEE DETAIL THIS SHTI o ~ 0 H ~ 346.60 I ~P I I i I
a O- c I t Z F I 1 I ~ I I It ` \`\1
DETENTION BASIN N0.5 I { } ~ ~ ~j~'~ , , ~ SEE SP R I ( ~ N 35 ITHlS SHE it ~ , ~ 1 ~ ST ORM 0 2
m o PRE-SETTLED DAM HEIGHT 353.50. - 347.00 + t 7:5 FEET ,
i. ANTICIPATED SETTLEMENT ~ t . 30th ( I; I ~r rFA(~ yq G - , . t
I m !ASSUMING 5.0% SETTLEMENT) (7,5 FEET)(0,05) ,I } •.0:38, FEET ~ r . ~ ARMO TEC 14RMORLO 5Y5T i ( 1 Q
,I ~ SETTLED TOP OF DAM - 353.50 - 0,38 ,\r ~ I _ 353:12 FEET r ' ;I ~I 1 tORrAPPROVED EOUAL) ~ ( ~ rJ
SETTLED DAM HEIGHT 353.12 - 347.00 ! STORMMATER 1 -l 1 1 I t ~ ~ [ORMWATER i ~ ~ 351.7 / 11 I ~
c 6.12 FEET QCLASS C DAM) , + 4100 FREEBOARD 353.12 - 352.09 I ~ BMP EASN'_T~__. ,4 1.03 FEET > 1.0 FEET. OKAY:. I 1 ~ 1 ~ ~ 1. ~ NCDOT SNOW L ) , ~ I Z
i y_. I ~ ' r 15EE DETA SHT C5.7t ~ 11 I y
} m _ ~ W 353.:5- ~ ~ ~ 1~, ~ 1 ~ ~ ~ I r 1
o EMBANKMENT ~ I 1 0 ~ ' ~ ( r^ WC
(SEE COMRACT[ON NOTES I ON SHT G5.3) ...---35
~ ~ ~ , I 'n V ~ ~ 353.5 i ~ ~ 1/1/
0 10' D MAX. 3:1 SLOPE TOP OF DAM = 353.50' I Ise '~S3 S~ 4~ y~,', hM ,
'i o EXTERIOR FACE. / , / ~ - _ - ` ~ I
r EMERGEHCY_SPILLWAY = 351.70
, ARMOR UPSTREAM SIDE. DOWNSTREAM 51DE AND TOP
I a OF DAM WITH CABLE 'REINFORCED CONCRETE CELLULAR a _ _ - ,
~ MAT OR THE ARMORTEC ARMORLOC SYSTEM.... WATER LEUEL 100-YR STORM • 352.09': ~ N SHT C5.37 ~
(SEE NOTE 4 UNDER CERTIFICATION 0 WATER LEVEL 25-YR-STORM • 351:76` + 1 c _ _ ~ - WATER LEVEL 10-YR STORM 1 1` r , 35.5 r g _ - ~
Q ~ ~ _ _ ~ - WATER LEVEL 2-YR STORM • :350:74'
T[E TO EXISTING GRADE: - WATER LEVEL 1-YR STORM • 349:92'
~ - T~ - _ ~ ~ _ _ ~ _ - ~ - .
0 - - - ' , ~ ~ , t NTS.. -F . t ~ o
N MAX 3:1 SLOPE
INV = 347.00 m NT R[OR FACE L -35q- Q \ e 15395 ~
;i N ,
i i 0 , ~ 40' w
x , ,
,,fit , Q ' Q
d MAX. 5:1 SLOPE TOP OF DAM = 353:50` _ i; c -1.~~___ " S a ~
z 0 ' / a
~ m - - - ~ \ a Q
~ _ 'I ~ ~ - Y ~r PRELIMINARY
n_ III-1 1 I--1 I I-I I-r- I I-1 11-1 I I-1 I i-1 o
rlliii1 iii^~'~~~~~~ 0 ~PJ~Q I DO NOT USE FOR CONSTRUCT ION I y BALL RCP STORM PIPES EXITING BASIN SHALL BE RUBBER GASKET JOINT "0'- RING PIPE: ~4 ~0V ~o~z Floo GASKET JOINT PIPES SHALL ALSd BE WRAPPED WITH A DOUBLE LAYER OF NON-WOVEN ~~4~ W
z ~ W W -
r m NTS FILTER FABRIC ON THE OUTSIDE OF THE PIPE AT EACH JOINT. LIFT HOLES WILL NOT BE scuE irv FEET ALLOWED IN RCP PIPE EXITING BASIN. 0 15 30 60 90 120 N
v to EMERGENCY SPILLWAY = 351.70' * 0-100 WATERLEVEL BASED ON STARTING ROUTING CALCULATIONS WITH WATERLEVEL AT TOP OF RISER AND ORIFICE BLOCKED. 0
:IZI e ro
z
`6348t3_.B.dgn 5/29/2008 10:20:42 AM PLOT BY=john E

~ of ~ w ~ I ~ . 8 , ~ '1 ~ 330 ~ W j ~ o TIONAi; U ~ A ~ g0 FNEUSE ? 1 ER
~ } 1
~ / \ ' ~
1 ~ I ~ ,
, II / ~ - i a 1 ~ • ~ cP.; 1 \ 2Q.' PUBLIC~STORM \ ' , \ ~ „ ~ •
~ ~ ~
\ ~ s I / ~ ~ y , \ \ , WATE DRAINAG~~ ~ 1 1 \ ~ EASM ' ` ` /I ~,~q
~s~-Z_ I 1 ~ ~ I ~
1 , ; \ I ~ I NO BUILD I ~ ~ I I ( I ! ,y~` 3 \
I ~ I . . • SETBACK ~ I 113` , / ~~ui' 340 ` ~ ` 1 I ^30'j X326,
I ; ~ r , I 1 0 [ TY OF . i , ~ , y + ~ l /I 1 ( ~ ~ ~ I I
j l_ ~ 3q0 D RHAM UFFER ~ I t I I 1 ~ h t ` \ \ ~ ~ \ 1 ~ ` ~ ! I SAN,
D GRE WAY ~ ~ + • ` ~ EASEMENT I I I + I ' ! ! ` ~ \ \ . ` 15" RCP ` \ ~ \ ` I t
/ ~ ' + ~ ~ INV = 351 79 ~ ~ I ~
_ I I III I I ~ I ~
~ ~ I ~ 100 / ~ ~ ~ , 4 ~ , ~ 3q2~ ` , 1 I / I ~ ~ ~ \ ~ 15 ' RCP \ ~ ~ _ 1 ~ 1 ~ [NV = 352.4.4 ~ , 1, 1h 1 I
/ I ca 52'
` ~ \ I~r
i ~ ~ / ` , ~ 1 1 ~ , 3y 1 ~ ~
~ ~ I ~ yo- I 1 I ' 65 /
~ ; ! 15 ' ELISE R [ R ~ } I ~ ~ I I , / ~ 1i t t R PA . N BUFF R ` W I o:
i~ i EAU ,D FRO ~ o / ,
1 P OF BANK 1 , ~ / a~P `
~ ~ ~ ~ 1 I 1 : ' ~ ~ r I ~ , r. ~ ~ 1 ,
i ~ \ 1 ~ 1 1 1, I / 1 , ~ c,+ 1 ~ ' 15 3 ,
i t 1 1 ~ I h~ ~ . ~f' ,y ` .d \ ~
i , 19 66 ~ 1 h~'~~G ~ w ~t` / \ STORM DRAINAGE CALCULATIONS FOR AREA DRAINING TO DETENTION B S
1 i I 1` ~ a6 ~ I ! (1 ~~F y0 ~ \ `3, ~ \ r, 1 \ DRAINAGE AREA TOBASIN = 3.6 .ACRES , ~ \ \ \
COMPOSITE RATIONAL C _ 0.53
~ 1 \ 12" CMP INTENSITY _
/ . I . / 1 1\t. \ ~ INV = 359.10' 1.0 INIHR ~ ~ ' \ \ 1 ~ DISCHARGE (Q FOR 1.0INIHR)_ 1.9 CFS
- ~ ~ ` ~ ae I ~ `
s ` I, I I \ ~ \ ' - 1 ~ • ` tip` w FLOW INTO BASIN BASED ON
~ II r ~ ~ ~ 112 ~ 1 - 1 ~ 67 \ ' " / , \ ~ \ \ 1.0 INIHR INTENSITY = 1.9 CFS 3
1 , ~ FLOW OUT OF BA51N AT 1.0 INIHR
` \ ~ ~ _ INFLOW TO BASIN (BASED ON
\ ~ 12" CMP RESULTS OF ROUTING CALLS) = 0.5 CFS ' , \ • IIJV = 359.9; ~
, : f' \
~ W ,15 I f ~o I\ FLOW TO LEVEL SPREADER BASED ON Q10 DISGHARGE - 0.8 CFS
` ~ ~ ~0 l 1 ' ~ 1,1 1 t~ a I ! M~ r l I , ~ \ , ,
l 4 1 / ~ i~: 0 1 70R ATER M f 1 + i I + I 1 1 I ~ ~ I ~ 1~; LEVEL SPREADER FILTER STRIP - 35 FEET OF FORESTEDAREA
~ ~ ~ 1 ~ ~ ~ ~BMP AMT t I } • 1 , ! 111 ~ I ! 1I -I , r ~ I~ ` 1 1 ~ ~ FOR ASjNoq 1! 11 I I I l j ~ \ 1\\ 15 FEET OF GRASS AREA ~~.r-
1 ~ ~ 1 ? f r ~ ~ , i ~ , ~ ~ _ , ~ ! ! J ~ L , ! , ~ It'd I b I s$ ~ I ~,1`3 . LEVEL SPREADER DESIGN = 49 FEETICFS OF DISCHARGE
11 1 \ / r J N \ f ( ! , ~ ~ ~ LEVEL SPREADER LENGTH (MIN) = 39 FEET
~ ' ~ \ 1 ~ /
11 f I I
~ 1 ~ ti t ~ I I Q I .a , , I 1 1 o~ , ~ 1 I 1 1 ~ ~ ho ~ ~ ~5 I ~ I ` l / _ /
_ ` 1 ~i / ~ I I 1 1 t i 1 I>> ! I I 1 I
1 ~ 110 x I ~ I I 1 Z I I. ~ I I I I I I 1 ~ ~9 I~ LEVEL SPR t ~ , ` \ f~ AN. SEWE SM
~ c ~ , , 1 1 , , o ( ~ FADER FOR s ~ t I ~ t\ I $0' NEU E R IVER j I I DETE M ` ~ 1 ~1 ..~-366----~ ~ \ \ % i/ ~ ~ ~_`1~`` ~
' 1 t i su FEIR 1 \ ~ ~ ASIN N0, 4 I ~ ~ ~18" RCP ~ ~ ~ \ ~ c''/"~/ ,
1 1 f I~ o (NV = 363.34 ~ r ~ \ \ 36q ~ ~
' ~ 1 cr I \ t ' ~ ~ ~ Q ~ 1 I I ~ ~ ~ 1 t ~ ~ ~ I I -t - 1 1 ~ w ~ ' , 1 I. 1 i
' t \ 1 ~ t ~ ~ \ N I A I I I w I
~ 1 ~ ~ / ~ I 11 1 1~ 1 , 1\ ~ 1 I I I 1 ~ t ~ , ~ \ , i , a 360 ~
~ ~ I 9 n h r - ~ 1 1 t ~ I I / ~ 10 t ~ 1 I
I t i I } } 1 1 1 1 r I M Q I I I ~ ~ ~ \ - __.~__.-.__.y:___
\ ~ t I w I ~I ~ 1 ~ i I } w 11 I I I I l ~~r.,~~ i
I , ~ . ~ ~ 1 _ ( I + I '1 ~ , , r
' ~ ~ ~ I I START OF NEUSE RIVER BUFFER : i T I 1. ~ r I i. I 3a~ 1`~ ' I ~ f
~ ~ I w ~ I 1 3yg I 1
/w I I I t 1 ~ ~ OFFSITE STORM SYSTEM ' ~ 1~3 lrr J \ , ~
M~ h l ~ ~ t t 08 ~ 04 I ~ I , W ~ I I I I- 1 1 1 I \ 1 ~ I. ~ ~ \ 'ter ~ 1
I ` ~ I I r I ! I 1. ~ 1., , I ~ -
2 , . . ( ~ 117 ,
~ I ~ M I I , ~ 341 ~ / ! 1 I . ~ J _
' \ ~ 1 I ~ • ~ ~I 5 0R ATE 3~° ~ ~ RM
If ` ~ 1 ~ ! , 1 1 . BUT ' \ I ~ 1 } i I , BLIP EA F,
q<CI / ~ 20' PUbL C 5TORM 177 / ~ I f \ 69 ~ , ` 1 2 r WATER RA[NAGE ( ~ ~ ; \1\ 1 \ ~ ~ r~~/ ~
' I ~ ~ \ ~ EASM T; 1~ I I. ~ / ~
~ I I 10 I; l I , .
t / / 'I I d ~ ~ I 7~
•
~ ?6 ~ ~ ~ ~ \ 76 1 ; I t `1`,"' ~ ~ , 116 ~
3S to 1 ! - , - ~ 8\ ~ ~ ~ \ ;
I \ ~ \
i \ . / !
1 1 ~ ! _ _ _ 53-_ _ - j ~
t ~ ,
I ~ - ' 1
I 106 ~ ~ , .i 354•-- - ~r I I , , ,.~-.,.355 ~ I ~ \ t`,: ~ `t~' 115 ~ ~
t
r r ~ ~ ~ss\ 4 ! ~ / h I / I I ~ 1 ,1'S ' RCP \ \ \ , \ \ ~1 4 ! II I I I I ~ INS/ = 375.2~~ '.1 t3 1 \
J, I ~ I f \
~ FFER i
~ , ~ Y OF DURHAM BU . .105 CIT. 1 j _ ~ , _ 5 _ i t , l ~ 1 I' -
I i 50' FROM TOp OF BANK - 1 ! i 1 I ! t ~ CHANNEL !
1 1 I ~ 1 . -BOTH SIDES OF ) / a ~ ~ ~ ,(Tl(P ~ ~ s so / , ~ _ _ , - .3 l ~ ~ ,~1'2 1 p(~/~ I_ it / ~1 c~ ~ \ ~ ~ / ~ Lett ~ ~ ~ ~ ' ~ n a\` o \ ! ! ~ / ~ ~ ~ I" ~i ' / ~ 15 RCP ~.1~ \ '
I 97 ~ 1 I S ~ ~ if ~ !
' `1 ! I,~ ~ 1 ~P~~ Imo! 1NV = 375.41 ° \ 1 \ ~1 ' f \ ~1
• ~ i ~ -
1 1 '
r I . 11
I , / ~ ~ 1
s ~ ~ 5 / ~ 96 1 '
i i i t' 1 r / c,
/ ~ ~ ! ~ f 60 ~ \ \ i~ 20 ' PUBL [C ~ TOM \1\ ~ ~ 'J' DD\ 1 ~I 1. 1 /~60 \ X61 ~ ~ I/ i ~ ~S RrDRAIN r;E,l//~, ~C' ` , `1
! i , i ~ ~ i \
~ NO-BUILD , J, S ,
~ L 95 : to 1 ~ SETBACK , ~
2> I 360 r , ~ I ~ ~ ~ ~ , r I \ \ 1
I • ~ ~ 83
` / ~ . ~ ~ ~ ~
! I I ( ~ v' 1,~ 1
P~YIC STORM . ~eT~ ~~~~~eae I ~ l ~ ~ Cpi ~ .
1 \ \ 1`{,~/ / , unf / r `t14 A;. RA [NAGE SAN. SEWER EA'M T (TYP) G ODWIN CROSSING SUBDIVISION
W --AINAGE uU 4iii ur u nnnm 1
-44 T 3. - c LEVEL SPREADER FOR
3 -G 121
VARIABLE DETENTION BASIN NO.4
VARIABLE G 969- FDRAINAGE DRA NA EASEMENT T (TYP) 11 Io SCALE: 1 = 50' `
99 rr-" _A 8 1 0-3--l SHEET LS-4 t

,
• ALL CONSTRUCTION SHALL BE ~ ANCE -WITH CITY OF DURHAM AND NCDOT STANDARDS, SPE ?RDS SRECIFICATIONS AND DETAILS .PIN) 0835-04-52-1161 AND 0835-04-53-427"4
TEMPORARY BENCHMARK:BNK CONTROL IRON PIPE _ N -852;666,6676 SEE TRASH RACK
! E-?;035123:2fr2' tSEE DETAIL THIS SHEET! p,.. 849,31' ,a,
BOU ` " ~ ' ` ' TIONS FOR RISERIBARREL • 30" RCP FROM
TOP Of-BERM GOOdWItlCrossin -Detention BasinNo.4 VE PREADER L[P ~ ELEV. 341.00 - g LE L S OUTLET-STRUCTURE L[P 45 LF La1:567,
EL. 341.10. x w j INV [N = 341.50
Riser Inside Diameter ft ; 5.0 class "B;; RIP-RAP ~ i ~ ~ [D50 = 8 I w/ GEOTEXTILE FLOW PATH iNV OUT = 340.80 3„ LAYER OF
RiserWall Thickness In : 5 FABRIC BASE 4 LL # 57 STONE GRASS FILTER/
a., Fa R R Pond 3bttom Elevation ft : 341,50 95x COMPACTED BERM a OR<EQUAL~ tATTACNED:TO, RIPARIAN BUFFER 6'-0' DIA MH.
~ ORIFICE DURING CONSTRUCTION. RiserGrest,Elevahan ft: 345:00: ' ~ 345.00 SK11aMER TD BE REMOVED APTER ' )SEE NOTE 11
` a 5' PRECAST S[TE STABILIZED AND .:REMOVAL Dense Of RISF:r Mafj Ibl ~ 150.00 ' '°APPROVED BY DURHAM COUNTY • INV = 340.50 TOP OF WEIR = 341.5D
.MANHOLE SECTION EROSION CONTROL ENGINEER! PI Inside Diameter in : 30 340,80' 45 LF ~ DURHAM STANDARD. PLASTIC • • Pi e:Wall Thickness in ; 2:75 340.80' TOP = 344.00 3 FT. WIDE
30 RCP STEPS @ IS SPACING. ~ ' CHANNEL c 2.22x i~ ~ ALIGN :WITH TRASH RACK Len of Pi" Ex sed: ft : 10:00 STRIP OF 5".DIA OPENING FILTER FABRIC
~ ~ fNV. - 340,00 .HATCH, ~ , . Dens' H2~ Ibl 62:40 aPPFto 30" DIA OPENING TO-LEVEL SPREADER APPROPRIATELY SIZED TO :CHANNEL (BY PASS) ~ << [NV = 340:80
o . , ONCR D s I ced b Riser 9354 c Volume H2O [ a CONCRETE FOOTER CNV = 340::80 .,I ~ I ~ ~
l` ° Wei 'ht H2O Dis laced b Riser Ib' 5836:82 15' TYP. / ~ ~
' R F1cE REEK Volume H2O Dis laced b Pi 68.74
( A L H H 1 e • Wei ht H2O Dis laced b Pi a lb : 4289.12 NOTES: zV . SPREADER DETAII. 1. INSTALL 4'- 0" OF BALLAST CONCRETE [N .BASE OF SPL[TTER BOX: ~
f CONCRETE LEVEL SPREADER D -IFty s4lso ; Totai U Iift Force Ib : ...10125.94 NTs ° . op vrs SPUTTER BOX DETAIL N ~
y \ ~ ' ~ , BALLA'ST• ' ~ ~ ~ T DIA• ORIFICE 60NCREtE a NTS //1 U
' ~ d' • . • ~ ~ F • , INVERT = a4LSD' Wei ht of Riser Ib : 3722.46 - OVA
• Wei hf of Pi a Ib : 2947.29 . W~~Z F
' Pi efRlserDOwnward Force Ib : 6669:75 . ~ i DURHAM. STANDARD PLASTIC ~ 'R°
STEPS ON THE OUTSIDE nF s ~W~r W
' MANHOLE.@ 15' SPACING: 6" DEEP WASHED ONE BBIIaSt CorlCrete: ALIGN WITH .TRASH RACK Minimum Factor of Safe : 1:25. ZZ ~o ` LL
HATCH, NnTE: R wired ballastthickne5s in : 24.40 .LEVEL SPREADER CONSTRUCTION SPEC[FIGATlONS: ~ ~ O LL Y 2~ a
TRl1 TORE DETAIL L RISER .STRUCTURE SECTION. SHALL Provided 8alla5t Thickness In : 25 ourLET s c i. THE LEVEL SPREADER SHALL. BE LOCATED OUTSIDE OF THE NEUSE RIPARIAN BUFFER. ~ 3 ~
BE STRAPPED TOGETHER WITH aor TD ScaLE STAINLESS STEEL sTRAPS• Total Downward Force lb : 12805:67 2. THE UP OF THE:GEVEL SPREADER SHALL BE CONSTRUCTED OF CONCRETE AS SHOWN ON •01~
2, RISERiBARREL SHALL BE GASKETTED Provided Factor of Safe 1.26 THE LEVEL SPREADER DETAIL (THIS SHEET) ANO SHALL 9E 3"-6" HIGHER THAN THE W ~ N ~ ~t S P EXfSTING GROUND ON THE DOWNSLOPE S[OE OF THE SPREADER. ~ •ly
n` * Q-100 WATERLEVEL BASED ON STARTING .ROUTING CALCULATIONS JOINT PIPE AND EACH JOINT SHALL WITH ;WATERLEVEL AT TOP OF RISER AND ORIFICE BLOCKED. BE 'WRAPPED WITH A DOUBLE LAYER (TYPI 3: THE LEVEL SPREADER .LIP SHALL BE. INSTALLED AT A 0-0.05x GRADE (LEVEL) ACROSS C
~ DF NDN-WOVEN FILTER FABRIC. THE ENTIRE LENGTH OF' THE LEVEL. SPREADER.. Z C~ pl y ~ 0~~?
a c.~ I ~ ~ _-III. 4. .THE LEVEL SPREADER SHALL BE CONSTRUCTED PARALLEL TO CONTOUR LINES ON THE V C
~ ~ W i ~ I-) I ° _ _ DOWNSTREAM SLpE OF THE LEVEL SPREADER 70 PROVIDE DIFFUSE FLOW THROUGH THE O Z ~ C `o _ - ~ III- III- FILTER STRIP/RIPARIAN BUFFER. 5. GEOTEXTILE FABRIC WITH 3"-4" Of !#57 STONE SHALL BE INSTALLED IN THE FIRST 3 Q
~I I -I I = _ - - I FEET FROM THE LEVEL SPREADER .LIP ON .THE OOWNSLOPE SIDE OF' .THE LEVEL SPREADER. ~ & W
-`III-III III- I I I_,_• I I _I I I _I ( 6. THE AREA ON THE`. OOWNSLOPE SIDE OF THE I:EVEL SPREADER SHALL PROV IDE A F ILTER ~ J ~ ~ ~ 02
W 010 DISCHARGE = 15.4 C -Li I-_I I I III-I 1 I STRIP FOR STORMWATER 0[SCHARGE AEfORE ENTERING THE STREAM CHANNEL. ZONE 1 ~ =W~~ CHARGE = t5.4 CfS (INNER 30 FEET OF THE NEUSE RIPARIAN BUFFER) SHALL REMAIN FORESTED. ZONE 2 ~
o 5LOPE _ 6:67x 6.67x ~ (OUTER 20 FEET Of THE NEUSE RIPARIAN BUFFER) SHALL BE SEEDED AND }AAINTAINEO W'=yjN PTH =0.65 3.0 ~ p•~Zo~
I - p 3X3 X6 FLOW DEPTH = 0.65' I n o CONCRETE. AS GRASS. GRASS SHALL BE PLANTED AND ESTABLISHED IN THE OUTER 20 FEET OF ~ O e~
- - - ~ o NOTES: PAD AT BASE 7" DIA ORIFICE PROP LINING.: NORTH AN O OF MANHOLE STAPLE P x , ! [INV= 341.50') NINE :NORTH AMERICAN GREEN x SC250 W/ THE. BUFFER PRIOR TO INSTALLATION OF THE LEVE! SPREADER. V~ ~ _ _ STAPLE PATTERN E OR APPROVED EQUAL 7. THE LEVEL SPREADER SHALL NOT BE CONSTRUCTED UNTIL THE ENTIRE AREA DRAINING
I ALL REBAR SHALL BE #4 REBAR (CENTERED TO THE LEVEL SPREADER HAS BEEN STABILIZED DURING CONSTRUCTION OF THE LEVEL M ~ VELOCITY: 4.9 FPS SPREADER. THE BASIN DISCHARGE SHALL BYPASS THE LEVEL SPREADER UNTIL CONSTRUCTION rw ~ ~ ~
I - ON OR[F1CE1 CHANNEL VELOCITY: 4. ALL REBAR AND ANGLES SHALL BE GALVANIZED WITH A BITUMINOUS COATING. PERMiSS16LE::SHEER: 9. 16LE;:SHEER: 9.0 •PSF BY-PASS ..CHANNEL DETAIL OF THE SPREADER HAS BEEN COMPLETED
i „ CALCULATED SNEER: 2.7 ALL POINTS AT WHICH TWO SEPERATE PIECES OF REBAR COME TOGETHER 5 0 MH TED SNEERS 2.72 PSF NTS 8. THE INSTALLED STORM DRAINAGE SYSTEM (INCLUDING DETENTION BASIN N0. 4 AND LEVEL
N ON SHALL 8E WELDED. THE. ANGLES SHALL BE WELDED TO THE ASSEMBLY AT ~ VARIES DEPEND! G LOCATIONS SHOWN ANA SHALL REST DIRECTLY ATOP THE RISER. NEEHAH R-7512-BiCAST IRON SPREADER) SHALL MEET THE DESIGN SPECIFICATIONS UPON INIT[Al OPERATION ONCE ? p}p THE PROJECT [S COMPLETE AND THE ENTIRE STORM DRAINAGE AREA IS STABILIZED.. ;
.MANHOLE WALL THICKNESS " PIPE SCREEN FOR 12" PIPE THE HATCH SHALL LINE UP DIRECTLY ABOVE STEPS WWICH SHALL BE INSTALLED ANCHOR'TO CONCRETE PAD 9. REFER TO SHEET.C5.6 FOR SEEDING SPECiFiCATIDNS.
I! ACCESS HATCH WITH ON THE INSIDE OF THE RISER. USING STAINLESS STEEL BOLTS,. N
FABRICATED HINGES TH A CHAIN AND A LOCK. THE KEY SHALL NUTS W/WASHERS;(4 TOTAL) THE HATCH SHALL BE SECURED WI W
5'LD, PRECAST ~ BE HELD [N POSSESSION OF THE PARTY RESPONSIBLE FOR MAINTENANCE OF R 3:50
MANHOLE THE POND. V
~ 2" X 2" X 0.25" ~ ORIFICE SCREEN DETAIL 2, L m ANGLES; TYP (4) _ 0
NTS ° , Q~d T `Z
ij R ° ~ ~ '0
~ ' S , " X " X 0.25" ANGLE 0 2 z ~ ~ p W
II ° _ c p o •s W 0. W ' Q ~ ~
E o p~ - ANCHOR TRASH RACK i0 MANHOLE WALL WITH FOUR
$ EQUALLY SPACED GALVINIZED'STEEL CLAMPS. CLAMPS I Jai ~ o
e 10° TYP. SHALL BE ATTACHED'TO THE- MANHOLE RISER BY 2" X
l ~ " C N RETE ANCHOR 80LTS: 0.5 0 C 40
iI; ~ ° TRASH RAGK SECURING NOTE ~ TRASH RACK DETAIL. ~ ~o
` r „ _ REFER TO SHT C5.3 FOR DAM EMBANKMENT
' 1 - 4 CONSTRUCTION STANDARDS .AND THE TESTING. m ~ ~ ~s 1 1 !
F ? OBSERVATION ANO CERTIFICATION REQUIRED , it o FOR. DETENTION. BASIN ,CONSTRUCTION, ' ° 1~1 1 1 /I r
ii o C• 1~1 ~ 1 ~ , ~ i i a } ~
q ~ I ~ v 11~/~ ( , 1 1 1 , I i I o ~ 3 ~
, `C' 1 1 ' I I ~ z
r CITY OF DURHAf~ ° PUBLLC WORKS DEPARTMENT 1 1 , ~ II , ~
4000PSI MONOLITHIG:CONCRETE CRA[lLE ' o _ FENCING d LIMITS ~ , IMITS 11 ~ 1 ~ 1 1 111 1 ~ Z ~ z NCE (TYP1 , i 1; ( ` 11 ~
° UNDER FULL LENGTH OF PIPE. CONCRETI: --.APPROVED OF DISTURBANCE [TYP1 D ~ 2' SHALL BE 2-2.5' SLUMP. CERTIFICATION r~ ~ I 1 t ~ 1 II W N
° z T T CONCRETE MEETS THESE 1 I HA ENGINEERING DATE 1 1 I y ~ 11 1 I ti 1 l ~ I I l 1 1 ~ II h M
' 30 o ~ - SPECIFICATION'S SHALL BE PROVIDED TO t 1 1 1 1 I I~ ~ 1 \ N W Yd } 11 r l ~ i Il ~ ~ 1;; 73 I i ~ r ~ Q .~I
• ~ • ' ~ RCP ~ • ' o • THE WN R, PLACE UNDER. PIPE WITH STORM WATER DATE.. ~ I 1 ' ~ n ,co ~ o n ao D E G 5 1 ° , 4 ~ TRANSPORTAT LON DATE ~ 1 1 I { / I 1 1 III 1 1 ` I / rr - IG. o
o , , ,o ,,o . s, .o . n HAND EQUIPMENT AND VIBRATE ti : 1 ! ~ - ~ ' ' ° ; ~ ; I NTERiJALL.Y FOR CONSOLIDATION, FINISH
~ e a r. ~ , . a o , / ° a '.~e a SHALL BE ROUGH PLOWABLE FILLS DATE ; W 1 1 L . 1 I , b? r 1 1' 1 ( 1 I I ~ i e
e 4 ~ ~ o R OR `GELS ARE NOT ' ' k ^ a'• .o SLURRIES 0
o ERMI ° t ~ ( I I r~ , ~ ~ W I I ~ I 1 ~ r ~ o°&~_F
a j r- _ `e~^',o', ~ Q'^ L`. a', n`, c`. a`= ~a', a' N0: 4 .1 ( ~ 'I ` 351 ` ~ / M 0° W
~ DETENTION BASIN 1 ~ m .1 1 II I 1 ~ r , • o ° G1 H
I' - ~ N PRE-SETTLED DAM HEIGHT 347,00 - 341.00 o r TION B-B T C 6.0 FEE E 6 I L ..1. ~ 1 I I r ! 4/ / ' 1 I I J ~
~ . , F.. _ ANTICIPATED SETTLEMENT.. , I I• I ~ ' ( I i 0 I 1 I I ; 1~ r
1 . 2 (ASSUMING 5.0% SETTLEMENT). (6,0 FEET)(0.05) ~ I ~ o 0.3D FEET ~
_ SETTLED TOF OF DAM'" - 347.00 -.0.30. + I ~ 346.70, FEET + r r 7 i 1 I I ~ i I~ I { ( I I I 4 a
" SETTLED DAM HEIGHT 346.70 = 341,00 L I 1 I
5.70 FEET iCLASS C DAM) ! } Q100 FREEBOARD ; 346.70: - 345,65 1 • ~ ` ~ I i~ 1 I ~ i I r~ ( I 1 I ~ ' ~r ~ I ( ( ~ r( ' ~ rl ~
c - 1:05 FEET > 1.0 FEET ,.OKAY 1 N I 1 i 1 i II ' 1 i I` ~ + ' ~ I
1 + EMBANKMENT ~ c (SEE COMPACT [ON NOTES I
~ ON SHT C5.3) + + r ; I I I ~ ' r I I t i , r r I ~ -
i } 10' I r ~ ~ ~ 1 ' I I t,/ ~ f i ~ + ~7 Z I I
m MAX. 3:1 SLOPE TOP Of DAM = 347.00' ~ 1 I 1 O" D A STA DPIP I ' ,r ~ f I i ~ TO = 345.00 I I z
' EXTERIOR. FACE _ f 3A I~ L - I rr
i ~ EMERGENCY SPILLWAY = 345.50' r r; 'I j I (I ~ IN =34111.50 ~ t i 1 r ~ ! I~ I I 3 1 1 (S E DETAIL TWIS i I r V IIj
~ o ARMOR UPSTREAM SIDE DOWNSTREAM, SIDE AND TOP - 1 r ~ I I
v N RETE CELLULAR 3~`'. 1 ~ OF DAM WITH CABLE REINFORCED CO C O _ fi ~ ~ ' o ~ 1 ~ '50.00 IF 30"I RCP 1.001. ~ I I I
' ° ORTEC ARMORLOC' SYSTEM. WATER LEVEL'i00-YR STORM • 345,65'. ~ MAT OR THE ARM v 0 fi ; • r (SEE NOTE 4 UNDER CERTIFICATION ON SHT C5;31 WATER LE EL 25-YR STORM • 345.56 - °o ~ ~ I I ( IIV IN1=3411.00 ~ I I i i id' 1
- - - - - r - WATER LEVEL 10-YR STORM • 345,45' L I ~ - ~ I I IMV OU# = 34A.50 ~ i i 1 j i ~ ~yW.. I I I I ~ t l Yi
I - - - - - - WATER LEVEL 2-YR STORM • 344.85' o ( 1 ~ W, 1 1 STORMW TER I ~ ~ ~ i ~ 11
o RA - - - - - - - ~ ~ ~ I ° TLE TO .EXISTING G DE - - - - WATER LEVEL i-YR STORM • 344.15. ~ ~ k N) ~ I ( ~ i BIPEAMT ~ I r i I ' 111. I
. a - - - - - - - --TIT' , 1 ~ - - - - - - - 1 t M ~ / I~ j I 1 ~ I 1 i I y 1 1 ~ ~ ~ 1101, r I ~ 1 1 ,11
! ~ 1 1- BY-PASS CPIANNELI - f I ~ + r 1 1' f-PASS CPIANNEL 1 1 r I 34.00 ( ~ r ' I ( J i I I 1 11 ~
NTS . , IsEE o~ra1L Alts + ~ MAX. 3.1 SLOPE INV = 341.50' ~ ~ SHEET).: 1 EE DETAILITNIS r Ir I I I ! EE 9PU R I r r r 1,`} I / 1 F p~ynuit~" IE I 3A0.751 OX Ei L t t r 1 1 ~ 44rr~~ y
INTERIOR FACE 1 + ~ r I r ~ r Itlll~' seEErl + t ~ r , y 1 1 ~ ~4 ~yi ~L I i 11 i r ~ I ~ ~ ~ l I 1; 1 1 0~~~ ' ~~5~''O<~•~~i W 0
1 ~ 1 1 ' 11' I
Ir m ARMORTEC ARMORLOC SY TEM i ~ - [OR APPROVED EQUAL! 1._... IMOR60C SY TEM I r ' ( r r ( r .I 1 I I 1 ~ y'~ ` ~ ® a ~ D EOUALI --ej.. rl rrr it f ~ ~r i ( ~rl"~ I I 1 It 1 SEMI.
m 30 N . -.v 1~ ~ ~ . tr . I + r ( ~ it t ; r rr i I 1 111 15395 ~
~ STORMWATER . IRMWATER 1 I I. ( 1 i t r• r r W r , I LO EASM i ' I ~ i ~ r rr r ~ i r' r ( ~ +~,f ~ ,
_ MAX. 5:1 SLOPE TOP OF DAM = 347.00' BMP EASM T NCDOT CLASS_B.RIP R! CLASS_B RIP RAP I i ~ i I rr ( rr rr I I ~ ` ~0 ~ ~ W
~ ~ fD50 = 13"1 22" REEF 13"1 22" DEEP , I i i ~/j i ~ rl ' rr ~r i i j •0 ~ ~ p
4: ai - - W/ GEOTEXTILE fABRI( - _ _ OTEXTILE FABRIC BASE ( ~ r r ~ 0 . I + I~ ( I I I ( I r I I
~ - - - W = 7.5' 0 j L r~ r r , r r I ( ~ ,.S~~2g)~, .5' ~ I I I ( ~ r ~ + I ~ r~ i r' r ~
z - - - - LEVEL Sp O [SEE OET LEVEL SPREADER DESIDNi ~ ~ ~ II ; ~ t + , J I I + ( r ~ (SEE DETAIL THIS SHEET)
r..- - - O(l.0 IN/HRt 0.5<CF5 ~ n A ~ ~
• OlH WATE ce ~ OIG TO L O1H WATERLEVEL 342 39' ~ ~ ~ ~ I'\/' I ~ H OI9 TO LEVEL SPREADER 0.8 CFS 111??? L
W NTS LENUIH F LENUM FUH FILIEK SlHLr t10' UHRZJ5 1t 40 ¦UUUtu) - 97 rl/Lr5 v O~~ ® LEVEL SPREADER LENGTH 39 FEET W
EMERGENCY SPILLWAY = 345.50 * Q-100 WATERLEVEL BASED ON STARTING ROUTING CALCULATIONS LEVEL SP In I o; i x WITH WATERLEVEL AT TOP OF RISER AND ORIFICE BLOCKED, DO NOT USE FOR CONSTRUCTION
~ z } W N RCP STORM PIPES EXITING BASIN SHALL BE RUBBER GASKET JOINT 0 -RING PIPE. W W ALL
GASKET JOINT PIPES SHALL ALSO BE WRAPPED WITH A DOUBLE LAYER OF NON-WOVEN SCALE FEEL W FILTER FABRIC ON THE OUTSIDE OF THE PIPE AT EACH JOINT. LIFT HOLES WILL NOT BE ,yRp _ G j
q p ALLOWED IN RCP PIPE EXITING BASIN: p~QS~p a a "so sa so 120 y 0)
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I ALCULATIONS FOR AREA DRAININGTO DETENTION BASIN N0.3: STORM DRAINAGE C I l ~ / I ~ /J \ ~ ~ ~ ~ l it ;i ~ y
~ ~ 7.6 ACRES r I /r i ~ ~
, ~ DRAINAGE AREA TO BASIN _ ~ . I ~ ~ r I COMPOSITE RATIONAL C = 0.37 ( i
I INTENSITY = 1:0 IN HR ~ ~
~ I ~ ~
Y / / ~ ~ 2.8 CFS ~ DISCHARGE (Q FOR 1.0 IN1HR) ~
~ / LEVEL SPREADER FOR ~ % ~r ~Z~~^~~~ ~
FLOW INTO BASIN BASED ON - - 1 1 ~ - I I DETENTION BASIN N~: 3 j ' I ' ~
3Tj , 1 ~ , i _ ' 1.O lNlHR INTENSITY = 2.8 CFS ~ I
- \ I ~ ~ ~ ~ ~ FLOW OUT.: OF BASIN AT 1:0 INlHR 1 , ' \ ca ~ 11'`~ _ INFLOW TO BASIN BASED ON J i , I w I
~ ~I -a. i \ ~ I I ! RESULTS OF ROUTING CALCS = 0.6 CFS: ! ~ ~ 59 -
376--" \ ~ I \ 1 I` ~ - I
I II ' \ I \ \ \ I TO LEVEL 5PREADER BASED / / ~ ~ II i•
~ r 3 ~ I ~ f I FLOW / ~S ~ \ I ~ I ON Q10 DISCHARGE = 1.0 CFS I s \ \ ~ J ~ ~
t ! I - I I r' BUFFER ~ ~ t ~ ~
\ \ I l i ~ ' 'FILTER STRIP = 50 FEET OF THICK GROUND COVER ~ -r \ \ I I I LEVEL SPREADER i F -NEUSE RIVER , ~ \ ~ ' 1 ~ I i
~ 1 I' LEVEL SPREADER DESIGN = 13 FEETICFS OF DISCHARGE \ ~ ~ i I~ ~ I l • ~ 50' FROM TOP OF BANK , ~ ~ I ! • 1 l r '
1 ~ GTH MIN = 13 FEET \ ! LEVEL SPREADER LEN ( ) ~ r l~ , ( \ r ' r l ---J--- 1 ~TYP. -BOTH SfDES OF CHANNEL) i ~ I , ' ~ , 57
` _ 11 y ~
T US~ AEA \ , , r NAL
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i r ~ / / / • 1 ~
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LEVEL SPREADER FOR
po llwmp
DETENTION BASIN NO3 JUN 2 7 2008
SCALE: 111 = 50' OENR-WNFERQUAUTY
WETLANDS AND STORMWATER BRANCH
08 1 0 3 1 SHEET LS-3

n y T NDARDS .SPEC
E WITH .CITY 4~ DURHAM AND NCDOT S A , ALL .CONSTRUCTION SHALL BE I ,~R NC 1 ADS, SPECIFICATIONS AND DETAILS. P~tu: oast-1~s1 aNn as35-oa-sa=az~4
TEMPORANY RENCHMpRK:BNK CONTROL IRON WPE
m N - 852.fi66.6876 SEE :TRASH RACK -2,036,7232771 tSEE DETAIL TNIS SHEETI
EL- 349.3Y
NCDOT ENDWALL.FOR 24" RCP RADIUS TO MATCH
TOP DF BEAM j, _ LEVEL SPREADER L[P ELEV• 318.00 EL. = 313.00 (SEE DETAIL SHEET C5.7) INSlOE RADTUS OF
w ~ , SPLCTTER BOX
~ CLASS_'8,, RIP-RAP ~ ID50 = 8 I wl GEOTEXT[LE FLOW PATH 3" LAYER. OF TOP VIEW 24LF 24" RCP c 2..50X
~ ~ LL FABRIC BASE 11,57 STONE RIPARIAN ?FERAN INV IN = 312,40
z 4"-FA R L T MMER aR-EQUAL, .tATTACHEO TO:- BUFFER 95X COA~PACTED BERM : \ ' s ORIF,LCE DURING.CONSTRUGTLON: INV OUT = 311.80 0 o i/4" THICK ARIFICE
315,60 1 ~ SKIMMER TO 8E>REMOVEDrAFTER yti 6" DEA ORIFICE PLATE !24" X 24"1 p BOLT TO SPUTTER
a 9' PRECAST S[TE STABILIZED .AND REMOVAL APPROVED BY DURNAM.COUNTY 312.30' ` MANHOLE SECTION EROSION CONTROL:ENClNEER1 aQ [NV = 312,40 BOx W/ 3-B" OIA
33~LF ~ ° ~ DURHAM. STANDARD PLASTIC 3 FT. WIDE G• STRIP OF 18 RCP FUE ~ I STAINLESS STEEL
STEPS @ 15 SPACIN t+ 1.20 CHANNEL FILTER FABRIC ALIGN WITH TRASH RACK INV. = 311.80' REL T OR RISERBAR LA IONS F FABRIC o o BOLTS. NUTS AND FROM OUTLET STRU A FNONT VIEW.. WASHERS. t4 T0iAL1
C C CU UYAN Y AL so < ' HATCH. APPROPRIATELY SiZEO GOOdWin CrosslOg - I~etenbon Basin No. 3 CONCRETE FOOTER 0 ~TURE . ~O
6' DIA ORIFICE _,-L,.~ TOP OF WEIR = 313.00
• INV - 313,50 is rYP. Riser Inside Diameter ft : 5.0 . ORIFICE PLATE DETAIL Z .Z
J I Thickness In : 5 Riser Wa I 5' - 0" D1A MANHOLE NTS ~
i FLOW TO SPLITTER_BOX ORIFICE SCREEN ~ o { A L THIS SH 1 Pend Bottom Elevation it : 313:0 C~NCAETE LEVEL SPREADER DETAIL SPL[TTER BDX _ ~ m :(SEE NOTE 1) ~ ~ ~
tNv - 313,50 s evation ft : 315:60 NTs < Riser Cre t • . • , gALLA•ST~ .TOP = 317.00
. ~ Y. ~ • ' : < • t : , ' : Densi of Riser Matl Ibl 150.00 • ~ ~ ~ ~ ' r~~ ~ • ~ . . CONCRE E.`• • • . , ~ BASIN INV = 313.50 INUERT = 312,40 24LF 15," RCP o 2,509. TD
y • • Pi 'Inside Diameter ih ORIFICE PLATE W/ INV-IN = 312.40 ~ Z y ,
' • • ' • Pi Wall Thickness in : 2.5 6' DIA ORIFIGE ~Ft~, lNV OUT = 311.80 W ~I: ~
Len th of Pi Ex sed fi : 10.00 DURHAM STANDARD PLASTIC k R ~ i INV = 312.40 tSEE DETAIL iHIS l~A9~ ~ 0~ W
! STEPS ON THE OUTSIDE OF ~ Dens H2O lb~ 62.40 3: S 5 0 ~ MANHOLE @ 15' SPACING, 6 DEEP WASHED ONE Volume H2O Dis laced b Riser 61:.47 SHEET) 9~ ~ Z W
• (TYPI ' ALIGN WITH TRASH RACK F9 ~ ~ ~
' HArcH, Wel ht H2O Dls aced b Poser Ib . ...3835.62 NOTE; Volume H20Dis -laced b Pi 45.87
1. RISER STRUCTURE SECTION SHALL -I~ - ' LET STRUCTURE DETAIL =l 'I I= OUT I - ° BE STRFlPPED TOGETHER WITH Wei ht H2O Dis laced.b PI a Ib : 2862.25 - - ~ - NCDOT ENOWALL FOR 15" RCP ~ W ~ N 1 a,
NOi TO SCALE STAINLESS STEEL STRAPS, _ _ Total U lift Force Ib : 6697.88 I I,I (SEE DETAIL SHEET C5.7) ~I
2• RISERIIIARREL SHALL BE GASKETTED ~ ~ _ JOINT PIPE ANA EACH JOINT SHALL. - - - - 'i IK 025: WATERLEVEL BASED ON STARTING ROUTING CALCULATIONS - - ~~I~I~~ ~
AN0 ORIFICE BLOCKED, BE WRAPPED WITH A DOUBLE LAYER Wel ht Of Riser Ib : 244$:19 - I I (-III - ~i WITH WATERLEVEL AT TOP OF .RISER - i-(I I- • ~ ' Of NON°WOVEN FILTER FABRIC.: ~y°D~ n~ os
Wei ht of Pi a Ib : 2168.03 ~ 010 DISCHARGE = 32.2 CFS - M N~ ~ NOTES: ~ C ~
Pi /Riser. Downward Force lb : 4614.21 SLOPE = 5: oox ' w FLOW DEPTH ° 0.85' 4.0` 1. INSTALL 4'- 0° OF BALLAST CONCRETE 1N BASE. OF SPUTTER 80X. 0~~~ /r ~ w
s ~ BallaBtGOnCrete: PROP LINING :NORTH AFRICAN GREEN tt SC250 W/ :
1 e : 1.25 STAPLE PATTERN E OR APPROVED:EOUAL Mllnmum Factor of Saf SPLtTTER BOX.:: DETAIL ~ J
~ ballast thickness in : 15.31 Tir: 5.8 FPS NTS 2 W ~ ' J~Vr Wayj~
a R ulred cHaNNEL vELOCI I Provided.BallastThickness in : 16 PERMtssIBLE sH~ER: s.o PsF BY-PASS .CHANNEL DETA L _ ~ _
' CALCULATED SHEERS 2.66 PSF NTS o o Total Downward. Force b : 8541.205 ~z~~~~ ~d~
a ~ ` - _ . o NaTES: Provided Factor of Safe : 1.28 CITY QP OURHAM MM ~ ~ M
i'~ 1- N _ p • ALL REBAR SHALL BE #4 REBAR PIIBLIC.WORKS DEPARTMENT W , '
ALL REBAR ANO ANGLES SHALL BE GALVANIZED WITH A BITUMINOUS COATING. APPROVED
u
INTS AT WHICH TWO,.SEPERATE PIECES OF REBAR COME TOGETHER ALL PO SHALL BE WELDED. THE ANGLES SHALL BE:WELDED TO THE ASSEMBLY AT ~ m NOTEt ENGINEERING DATE
VARIES DEPENDING ON ~ LOCATIONS SHOWN AND SHALL REST DIRECTLY ATOP THE RISER. o MANHOLE WALL THICKNESS REFER TO SHT C5.3 FOR DAM EMBANKMENT STORM WATER DATE N
HE HATCH: SHALL LINE-UP DIRECTLY ABOVE_STEPS WHICH SHALL BE INSTALLED T CONSTRUCTION STANDARDS AND THE TESTING TRANSPORTATION DATE
ON-THE 1NS1DE OF THE:R[SER. ACCESS HATCH WITH: OBSERVATION AND CERTIF[GATION REQUIRED ~
THE HATCH SHALL BE SECURED WITH A CHAIN AND A LOCK.... THE KEY SHALL ` FABRICATED HINGES -FOR DETENTION BASIN CONSTRUCTION. DATE DATE ~ 0`
' T ~ BE HELD IN POSSESS-ION OF THE PARTY RESPONSIBLE FOR'MAfNTENANCE OF I 5 LD. PRECAS R3,5Q THE POND. tJ.
MANHOLE L
~i > 2° X 2" X 0.25" ~ 5p Z
t~` o ANGLES TYP 4 ' + , ~ ~ ~ \ ° ~ ~ ~ ~ ~ ~ y ~ ~zo 1 "k ~t I~ 1 1/ ~ ~ y t ~ t ~ ~ t C
~ ~ \ ti }
p, -2" X 2° X 0.25° ANGLE ~ ~ < ~ , ' X ~ .y 'a ~ ~ ° a ~ 3
c ~ ~ \ ~ ~ ti ' ~ 1, ~ \ ~ ~ ` ~ 0 ~ 1t ~ ro y ~
ig o +----,ANCHOR TRASH RACK TO MANHOLE WALL WITH FOUR. 56 ~ ( ' ~ ,
~ ~ ~ ~ , ' e EQUALLY SPACED GALVINIZED STEEL CLAMPS. CLAMPS , ~ ~ ~ t I ~ i l ~ 5 l ~
I ° 10 TYP. SHAH. BE ATTACHED TO THE MANHOLE RISER BY 2 X ~ ~ ~ ~ ~ 1
" N BETE ANCHOR BOLTS. 3'x3'X6" ~ ~ , ~ ~ 0,5 CO C ~ c CONCRETE ~ t ` t
° SM RACK DETAIL TRA KSECURIIJG PAD Ai BASE s" OIA OR [F ICE ~ ~~I ` ~ TRASH RAC _ OF MAHHALE ~ l INV= 313.50' 1 , ` `
a 1 4 (CENTERED 1 ~ . ~ ti
m ON ORIFICE? ~ 1 r • ~ ~ ~ ~ ,
~ ' - " MH 4` ~ ~ ' t 1
0 4 0 ~ 1 ~ i ~ ~ ( ~ 57 ? ~ ' 1, 601 _ ` ~ ' * ~ 3
{ m NEEHAH R-7512-Bi CAST IRON ` c, ( ( ~ I. c PIPE SCREEN FOR 12" PIPE ( ~ - (
°c ANCHOR TO CONCRETE PAIL I I ~ ~i r ~ c _Z
" USING STNNLESS STEEL BOLTS, I I I NI r ~ 4 0 S _ I I , ~r , ~ P I MONOLITHIC-CGNCRETE CRADLE ~l 1 r ;r ~i ~T-~ ry y~i. I. I ~c \ ~ ~i s BYPASS CHANNEL (SEE (n
m 017 NUTS WIWASHERS. 14 iOTAU ` r ; ~ UNDER FULL LENGTH OF PIPE. CONCR r 13 t" r ~ ! y/// ~ DETAIL. THIS SHT) a r ~ m
• ~ I I I ,c; 8' q, 2' SHALL BE 2-2.5 SLUMP. CERTIFLCATION ~ , , i I , . L 2 I i 4LF 24" RCP ~ 2.:59x ~ - ~ ~ q
THAT CONCRETE MEETS .THESE ' I . PROVIDED TO I i ( I ' I o ~ 4 A BE
2 SPECIFICATION 5 SH LL ORIFICE SCREEN DETAIL • RCP ' D THE OWNER: PLACE UNDER PIPE I 1 I' ~[NV IN = 312.40. f ~ ~ ~ ~ ` ~ NCDOT CLASS B RIP RAP r ~ O ~
A a , •a A a. NTS I ~ 1 ~ i r r !T j lNV OUT = 311:80 Ir I ~ ~ ~ , ~ , I ni ~ r (d50 = 13") 22":DEEP II
I ~ ~ a << ; u ; ~ NANO EQUIPMENT AND VIBRATE < . A << , I Erl rl , r r' ' I ~ a• r p , I 1 INTERNALLY FOR CONSOLIDATION, FINISH ~ ~ a ..A ~ , i , I ! a 1 ~ I I 111 i I ~1g I i ~ 312 _ W/ GEOTEXTILE FABRIC BASE
r w ° fl ~ H' PLOWABLE FILLS ;,A ~ a a, ALL ( I i I ~ , I ' RUG BE 0 ` V r
i - - ~ , • . , J. ~ . < ; SLURRIES OR OR GELS ARE NOT ~ ~ ~ r , N ~ I I ° ` ~ A . ~ ;`•o PERMITTED. ~ ~ ~ r ~ I ~ , ~ I o ~ ~ 394 ' , , ~ `;7 I' Ir j I . N ~ 31 450 61 ~ ~~a _ _ 311.8D~ ~ Q 11 ~ ~ m d
W ~ a.. A A+ 1~ Q +_a A A' a C l ` I I 1 I i I ~ 1 r ~ I SEE SPUTTER / ~ ~ 1 ~ :D O ~ C1:
G , + ~ I L I 1 r a " , ~ ~ BOX. DETAIL ~ ~ o '7 ~ tp ' ; i' r ~ ,1 ~ ~ _ _ ~ ~ ~ ITHIS SHED m
y i v ~ DETENTION BASIN N0.3 o I r I Ii I I ~ rll I ~i ~ ~ ~ .,312.30 NEUSE RIVER
Z ~ -B I , , B N _ .714. PRE-.SETTLED DAM HEIGHT 318:00 T II ~ ~ ~ ` ~ ~ fl IPAR~ BUFFER )+t ~ ~ i ~ 1\~`~24LE'~ "`RCP Q'2.$0y. ` ~ 311 80 ~ (MEASUR D;,FROM Q
r ~ _ 5c0 FEE , 1 I r 1 ~ ( I hiV [ = 3-12.40 ~ ~j \ ~ 31.2. q TOP OF BAA1F~~ j
m ° 1 - 2 ANTIGIPATEO SETTLEMENT „ 4'-0 1 A IfAN PIPE (ASSUMING 5.O%: SETTLEMENT} (5;0 FEET)[0.05I OP =1315. 0 'I A 1fAN PIPE I 1 IaV'OU = 311.58. ` ~ r , p =i 315.0 i ~ ~ N .LEVEL PREA ER ~
G ° 0.25:: FEET. NV ~ 313: 0 ~ SETTLED TOP OF DAM 318.04 - 0.25 SEE DETAIL. T [S ` ~ (SEE DETAIL THIS SHEET) q DETAI OT~[S ( 1 i ~ ~y ~ O(1.0 IN/HR) = O.6 CFS rJ
i } :317:75 FEET HT7 (i 1 1 i ARMOR:T C ARMORLOC ` ~ `010 WATER LEVEL = 313.85
c SETTLED DAM HEIGHT. 317.75 313,00 ( t _ 4:75 FEET (CLASS D DAM} ( ~ `~1 ! ~ I ~ I ~SYST fU ` ~ ` ~ ~1~ ~ , 010 TO LEVEL`SPREADER = t.6 GFS , 1 ~ ! ~`j _(OR AP OvED EQUAl7~., .1, ~"'LENGTN FOR GAA55 6-DENSE ~ ~ ~ ~ ~ ~ ~ ~ 'lam GROWTH FILTER STRIP = 13 FT/CFS p.
i ( Q25 FREEBOARD - 317.75-- 316,67 ~ EMBANKMENT 1,08 FEET > 0.5 FEET OKAY ! I t ( n14 i ~ ~ ~ ` ~ l+ ~\S~. ~ ~ LEVEL SPREADER LENGTH = 13. FT (MINI [ •1 ~ z
(SEE COMPACTION NOTES 30' 1TY OF DURHAM ~ •L N SHT C5.31 A ~ A ~ ~ t I 313.50 3~3.50~~. ~ '~4' ~ 1,• `X ~ rr ~I
r \ 3D
il' } ~ 1
MAX. 3:1 SLOPE TOP OF DAM - 318,00 - L.___-- a t ~ - ~ EXTERIOR FACE \ I ~ ` ~ ' ~ ~ STORMWA ERS ``r i
t y'~ 'I( ~
L EMERGENCY SPILLWAY = 316.30 T _ , ~7 k,,,~
° w TREAM S[DE AND TOP r a ARMOR UPSTREAM S[DE~ DO NS ' C CONCRETE CELLULAR. ~
o OF OAM WITH CABLE REINFORCED I' BLOC SYSTEM, - . + ` HE ARMORTEC ARMO \
• MAT OR T • r > WATER LEVEL 25-YR STORM • 316,67 I - - I N TE 4 UNaER CERTIFICATION ON SHT C5+31 _ - t5EE 0 - ~ -}t-1- ' 32 ~ ~Q~ ' 31 T, 50. r FENCING d,l[MITS ~ W i- S ` Z\^~ _ _ X~-~ ~ r r OF DISTURBANCE (TYP)
i WATER LEVEL 10-YR .STORM • 316.58 + L _ - - WATER LEVEL 2-YR STORM • 316:22
- - - - - o _ - - WATER LEVEL 1-YR STORM • 315,89' TIE TO EXISTING GRADE - - - -
- - - - \ 1"- \ _ f~IM '
tom- I \ , MN~Y, O/ 1
s ~ NTS MAX. 3:1 SLOPE _ `ONSTRUCTION SPECIFICATIONS;
r INV 313.50 LEVEL SPREADER C ~ INTERIOR FACE G fJ i `1 1 _ \ I ' SEAL ~ ' ~ Q
1, THE LEVEL SPREADER SHALL BE LOCATED OUTSIDE OF THE REUSE RIPARIAN BUI LSE RIPARIAN BUFFER. 6. THE AREA ON THE DOWNSLOPE SIDE OF THE LEVEL SPREADER SHALL PROVIDE A FILTER - ~I X ; ; X5395 ; ~ ~ '
"m : 2. THE LiP OF THE LEVEL SPREADER SHALL'BE CONSTRUCTED OF CONCRETE AS SHI CONCRETE A5 SHOWN ON STRIP FOR STORMWA7ER DISCHARGE BEFORE ENTERING THE STREAM CHANNEL. ZONE') ) ~ ~ ~ (J" • • ~ ~ 7I1
~ THE LEVEL SPREADER DETAIL !THIS SHEETI AND SHALL 8E 3"-6" HIGHER THAI 40 ` N '-6" HIGHER THAN THE tiNNER 30 FEET OF THE NEUSE RIPARIAN BUFFER) SHALL REMAIN FORESTED. ZONE 2 j ~ j ?"r 'L~~, Q:~ ~O~ (OUTER 20 FEET OF THE NEUSE RIPARIAN BUFFER) SHALL BE SEEDEQ AND MAINTAINED xl 1 x ? ~ ; ..I
EXISTING GROUND ON THE DOWNSLOPE SIDE OF THE SPR A 3. THE LEVEL SPREADER LIP SHALL BE INSTALLED AT A 0-0:05y GRADE tLEVELI GRADE (LEVEU ACROSS: AS CRASS. GRASS SHALL BE PLANTED AND ESTABLISHED IN THE OUTER 20 FEET OF ~ ' ?~t?, ~ n` +`'0~ ~ ~
_ ' T P F AM = 31800' THE ENTIRE LENGTH OF THE LEVEL SPREADER. N MAX. 5:1 SLOPE 0 0 D THE BUFFER PRIOR TO INSTALLATION Of THE LEVEL SPREADER. I ~ I p 7. THE LEVEL SPREADER SHALL NOT BE CONSTRUCTED UNTIL :THE ENTIRE AREA DRAINING ~I _ 1 C~Z , qC W ~ Z )NTOUR LINES QN THE I I , I ,I I ~ / ~ Q ~
1 N 4. THE LEVEL SPREADER SHALL BE CONSTRUCTED PARALLEL TO CONTOUR LINES ON ' m DOWNSTREAM S[DE OF THE LEVEL SPREADER TO PROVIDE DIFFUSE FLOW THROUGI 15E FLOW THROUGH-THE TO THE LEVEL SPREADER HAS BEEN STABILIZED DUR]NG CONSTRUCTION OF THE LEVEL kj~ i p Q
!1 x - FILTER STRIP/RIPARIAN BUFFER: m - - SPREADER. .THE BASiN DISGHARGE SHALL BYPASS THE LEVEL SPREADER UNTIL CONSTRUCTION V
_ _ _ _ 5. GEOTEXTILE FABRIC W[TH 3"-4" OF X57 STONE SHALL BE INSTALLED !N THEM - ?I ° . _ _ - - - - FEET FROM THE LEVEL SPREADER L1P ON THE DOWNSLOPE SIDE OF THE LEVEL ' iiALLED !N THE FIRSi 3 Of THE SPREADER WAS BEEN COMPLETED E OF THE LEVEL SPREADER. 8. THE INSTALLED STORM DRAINAGE SYSTEM (INCLUDING DETENTION BASIN N0. 4 AND LEVEL
I ~ - - - Z - - - - - SPREADER? SHALL. MEET THE DESIGN SPECIFICATIONS UPON INITIAL OPERATION ONCE ~
li ~ i,, F m ' THE PROJECT IS COMPLETE AND THE ENTIRE STORM DRAINAGE AREA IS STABILIZED. O~ v ~ ~ C ~ n L ~ I~~~ O ~ 9. REFER TO SHEET C5.6 FOR SEEDING SPECIFICATIONS. C I V i ' v
..rte ~ ~ ~
N ~ ~ e~ ~ M f.~nT LiCC CnD !'nKIGTRIIf T lnhl -~i1
NTS s, o EMERGENCY SPILLWAY = 316.30' 025 WATERLEVEL BASED: ON STARTING ROUTING CALCULATIONS ALL RCP STORM ALL RCP STORM PIPES EXITING BASIN SHALL BE RUBBER GASKET JOINT "O RING PIPE. H
WITH WATERLEVEL AT TOP OF RISER AND ORIFICE BLOCKED. GASKET JOINT P Z 4- VV IIVt YYL VVV~i/aVV~v• I IIr GASKET JOINT PIPES SHALL ALSO BE WRAPPED WITH A DOUBLE LAYER OF NON-WOVEN s FILTER FABRIC ON THE OUTSIDE OP THE PIPE AT EACH JOINT, LIFT HOLES WILL NOT BE W M Q
' FILTER FABRIC D is w ALLOWED IN BC ALLOWED IN RCP PIPE EXITING BASIN. SCALE IN FEET _ yv c
a a
.p m 15 30 60, 90 120
!zl N 0
16340~3_8.~gn 5/24/2008 10:2 1:14 0i PLOT BY=john -