20050732 Ver 10_More Info Received_20080702

Bobbitt Design-Build, Inc.
600 Germantown Road
Raleigh North Carolina 27607
[phone]
Fax [phone]
bobbitt.com
Letter of Transmittal
FY.? 0?-o-)32. V t')
Date: 2-Jul-08 Job Number: 2840
Job Name: Wood Charter School
To: NCDEHNR Attention: Joseph Gyamfi
DWQ-Permits Unit
23
21 v
2321 Crabtree Blvd QD
We are sending you the following items:
Shop drawings x Plans JUL 2 2008
x Copy of letter Samples
x Prints Specifications utNk. WATER4UAUTY
Change order 01 LANDS AND STORMWATER BRANCH
I Cooies Date No. I Description I
2 sets REVISED Wet Pond Constructions Drawing; Sht. C7
These are transmitted:
FOR BIDS DUE (Date)
For approval
x For your use
x As requested
For review & comment
Approved as submitted
Returned for corrections
Resubmit copies for approval
Submit copies for approval
Return corrected prints
Remarks:
Copy to: File
Thanks
From: Blair Pittman
bpittman(a)bobbitt.com
ToP,oF cuRe NOTES GRATE PER CITY STANDARDS USE STD. N0. 30.13 OR 30.14
1) THE SLOPE aF THE GUTTER TO I / ~ / I / N E
TFIE CATCH B4.SIN ON THE UPHILL ~ 9DV[ SIDE SHN.L BECM 10' FROM THE
12 3/4 wrt ~ THE CATCH BASIN. THE SLOPE OF B I / Y THE GURER TO THE CATCH BASK! ° . - / ON 111E DOWNSTREAM SIDE, / / w EN~r'~ to m
SHALL BECBI 5' FROM / THE CATCH BASIN. t~• p~R ~ 2~-0' ~"I ~ / / / / CLASS TRIP-RAP WEIR ~ y ~ Z ~ / / PROTECTION FOR EMERGENCY ~ ~
2-Y al 1PC aR PtC~ 2) STEPS SHALL BE INSTALLED IN 't ! / / / / OVERFLOW FROM WEIR TO ~ aT E t ~.o
STANDARD GRATE TOP DR~INLET / a' w.~a tY uv tY w ALL CATCH BASINS OJER 3' IN DEPTH. ~ / w ro r ma rov a aam. DEPM sHUi BE MEASURED FROM THE TOP - 418.75 / / / NATURAL GRADE ~ ~ m ~ ~ ~ p~ / / CLPSS,I RIB-RAP J ~ U ~ 0)
b at/'• 8„ ORIFICE ®41x75 W/ / / o TOP of THE CUTTER TO THE RakRt w A VA VAL S M 5~ Df THE CATCH BASM, a, akn e, ~ 10 ~ ~ Lys y~ / 10 X20 X 0 W~ LINER ~ ~ p
0 OF STRICTURE 0 3) u~oD NO 4NX4~%8 OR 4x~e1: eYS~s. t~'~ u~.a ~ ~ PAINT OUTSIDE11 / ~ ®300SF~ARMO ED SLOPE APROX. i m ~ ~ u- 'o
°w 4 WITH WATER PROOFING / / 12" 15' ) NCDOT APPROVED PRECAST c a / / / ~
CONCRETE BOXES ACCEI°TABLE ~ ° ~ t / / ~ uslNC STANDARD 5 cASnHCS. • ° ~ A . A ~ / CF m
' ~ 1 ° ~ ° a/:• 18" HOPE ®0.5% / z / O ~ ~
' ~ 1YI ANTI-SEEP COL AR ~ 3000 woD Ps wHatLte ° n L ° ° a a/e' IN IN 411.75 \ I l ~ ~ ~ BAFFLE 2 (SEE DETAIL BELOW FOR WINDOW LOCATION) W r l ~ - _ ~ / ~
P.S.I. pp I V. UT 411.50 ~TLETS ®RIP RAP DISSAP TOR PAD /p'D,° 7
r w ro tr o® ; St/A' I . m m
e ° a ° e : °'e ° 6• IY OWI tr DFID 3 T 11/P ' ~D - / ~ / r:.'~`':::`'~'~'c'C~iir}i?'rii?iiii'riiai.iMC".'!',~ii~:4:::''ri:~'r'r}ii:i°}'r':ri:..
--1 ~ ~ 1 NOTES: ~ . / t tn' 5'~(12'X22" CLASS ' ~ L~ ~ ?`;:~.`1::::::;`:`:::::::':;;;:::';`::;:;;"-_~:;::;;::;;:;;::-:.. BAFFLE 1 (SEE DETAIL BELOW FOR WINDOW LOCATION) ~
i) FOR 24' RCP rA URGER USE Rip-RA STANDARD C.B. STEP PIPE ~AAIETER PLUS 12" FOR I'tal PR TECTiON 11-ET
J /3 KEBABS ta' MINIMUM INSIDE DIMENSION. B ~ / e• LaHC l~~ SECTION B-B ~ `::F::`'~::..:::;: ;'::?`.~`:~'~~:?:`:a::;-:: ~ F~~q N gp~FlE y~ F~pW-THROU H y~N 0 Hi ~ ;"::;:i;~..,, s TOP ~F~AFFLE TO ~ AT TEMPOR,4f~Y POOQ ELEVATION-419.50 c?
r 2) 2a' x 2a' casnNG wRH 12`, r~• ~ ~ ~ I / ' 1s ~ 16• PIPE, 2a' x 3s' r""'/` ~ ~ LEVELISPRE R / 10X1.5 FLOW THROUGH WINDOW TO BE AT ELEV. 1417.0 ~ • ~ ` ~ WINDOWS TO BE ON OPPOSING ENDS OF BAFFLES TO a •
~ ~ a• CASiiNG USED WITH 24e PIPE Y-t t 4' . =P OR LARGER. IF PUCED WITHIN ~ / ~ MAXIMIZE FLOW LENGTH ~ ~ i. ~ TYP. OF TWO IN MAIN POOL
t / / / ° ° o00 00o PUBLIC R/W CASTING MUST BE Po TRAFFlC BEARING TYPE PER •--II--- / / / 1 t: ~
'4 ' T-Y asES aY -t A NCDOT STANDARDS. s/e' t. Tro' / / / Sato ox e r ~ ELEVATXIN -I I--I I'--
aarD -te• mow roraw. 3)USE4'X4'X8'OR4eX8'X / / N VEGETATIVE SHELF
~ ~ 16• SOLID CONCRETE BLOCK. CAST - ~ Y-~ NON ~„q4 RI PLACE OR PRECAST CONCRETE TO ~n + / / ~ ti` ~ ,::::i~:iy:?;i ~ 10:1 FROM 417.0 70 416.0 . ~
t war. C tw+Daa MEEi N.C.D.O.T. STANDARDS ~ / / tr 0°P tMnaDq ACCEPTABLE. - / I ~ ~ PERMANENT POND ELEV.-417.50 ~ ;:;~;;;cs;:. 11 TEMPORARY POND ELEV.-419.50,
rD~'rav or~a a tr -i 4 t/2• Lt -Lt'!- T^ / flfVAtpN SECTION A-A 4) FOR STEP REQUIREMENT; SEE NOTE / i ts't». 2 ON STANDARD N0. 30.01 SECTION A-A O / :::::::.t:;::;:::: ~ i;:;=3:;::;?.. ` INTERIOR POND
stAUCntu is / autm txw tr D[rP,iDDING b ~ \ / / ~ ~-SIDE SLOPE VARIES 3:1 FROM 410.0 TO 417.0
ro E10° STANDARD 24" X 24" DROP INLET CASTING DeroxD nc stAUCtuAt 10:1 FROM 417.0 TO 418.0
I a'-o' --i ~ ~ / / / 1/7 D ~ 1 ; i ~ _ ` 3:1 FROM 418.0 to 420.00 1
6' 6' I ~ / 44 / :',a ~ 1 **MARSH TYPE PLANTS ~ TO BE PLANTED AT PERMANENT
Sao.: ° e s::c.^ / I 8" HDPE ~ 1.0% \ I ~ ~ WATER LEVEL AND I 1 ..P ,a u AT FOREBAY EMBANKMENT
. e 3000 P51 coNCRETE / WITH ANTI SEEP COLL R / / a STANDARD DROP IIJLET DROP INLET CASTING / / INV. IN 41/3.50 I r _ ~ ~ SEE LANDSCAPING PLAN, SHEET C4
.STANDARD CATCH BASIN ~ ~ INV pUT/4122.220 / OUTLETS ®FOREBAY FOR / / x ~ t ~ ~ FOR TYPE AND LOCATIONS I a
/ / LEVEL $1'READER wi / / / 1 % ~ i~
~ ~ / JUNCTI BOX/ MANFjOLE WITH CESS 1 1 t
1• °1Xdt san sBal. 900D spat °R / TOP 419.50 MIN. Q P~ ~ MAY °E / P T OUTBID DWI t ` ~ ~r
Z AAIDAM 9REPS 9EOR4D • 18' O.C. O way oErM ~ / W TER PROOFING /
MAIl101E RAq Aiq / / ~ 0'Q DETAIL 7.Be) a u9E MN. JDOD P3L oONO. La. ~ - - ' MAr eE cASr w BLAB aR • ' ~ , s / / ~ ~ ~
9~im To tar ovr:T1 s1EPB 4, NfloE o1wEAeDN PoR s4 PPE - ' »i + Aro aFAtfl! 119E PPE pA. PLUS fY. ~ ~ ~ / r~, ,
- a TIIe1E oEm1 ooctms s r -'.ri / / / w...: ti,
R"o NO C01°"D eE "~"'m 1.5' X 10' FLOW THRU owl s>~ / /
~ WINDOW / / i::';:'ti€::::?"::.. ` ; ~ 6'X15'X30" CLASS .I. ::a:;:::::: i S~ PROTECTION TI-ET
/ / CONCRETE SLAB
/ / H~rii®>rta1 suns
p g'~~>~, / 10' FORBAY ~ '9
_t•tiS,: / EMBANKMENT All an 1 ~ ~
ndnnmmainw~th. ~ . ~
\ ~ 9
aaIR9E . ^S:~i • _ ~ DEDICATED ACCESS AND
~ **MARSH TYPE PLANTS T ~ ~ , W BE PLANTED AT PERMANENT ~ / FROM AWOODLAND GROVE f LANE AROUND WET POND DRAWN BY:
TER LEVEL AND ~ . PPE ; sraNUV~ sPrs ~ 4° AT FOREBAY EMBANKMENT ~ If
16' o.~ ,;y.y ~.L• SEE LANDSCAPING PLAN, SHEET C4
„ `~„•~z; FOR TYPE AND LOCATIONS d' ~ JEB r
~ PLAN •r ~ I **POND BOTTOM TO BE LINED WITH HK BY:BPP
u:r•~:' NATURAL CLAY TO THE PERMANENT
SECTION goo ~ uoNa.1E POND ELEVATION. ENHANCE LINER WITH BENONITE AS NECEEARY TO ENSURE SEAL
» - ~ -rr~~°~;:: FLOATING BAFFL 1 - 20
i • R99 le p1.~eeieeAt>L+~ u1e J
TOP ! ~ ~ m ~ ~1t>hoa. N.T.S. STANDARD JUNCTION BOR iPPPH CONCRETE SLAB A sezl~ ix ch~ix C>~.>rb m the clwm t P T?K~
b%ll~st atd strtngth. ali.w i6er 9aiiit~oaal auelhns. a
NOTE: JINICnON BOX/ MANHOLE TYPICAL W17H accESS TOP - 419.50 (MIN.)
' LAYER OF 1. FOR 50-FOOT VEGETATED BUFFER: 65 FEET OF LEVEL SPREADER PER 1 CFS OF FLOW TOP OF BERM sTANOaRD GRaTE ra STANDARD GRAZE TOP INLET PAINT OUTSIDE WITH TOP - 418.75 WATER PROOFING
57 STONE aND WEIR TOP - SEE PLAN FOR PAINT 1 2. CONSTRUCi 1HE LEVEL SPREADER ON UNDISTURBED SOIL EI.EVanoNS MATH wA1ER P6 PAINT OU15X)E ~ Z NI1H WA1FR PROOFNG
~RI~-~ 3. ~p~ S F'OR UNIFORM VERTED 2' PYC
~ING OF~O~. C~NCR. CHANNEL 4. AB 1H ON ~An1MER1AND DRAW-DOWN ORIFACE INLET PIPE TOP EL. 417,50
20'-0' 30'-0 I Rte, TO BE ARMOURED
n N 2 BU ONE 1 BUFFER FFQt W+n+ a.ass I RIP-RAP ZO E Z E EMBANKMENT TO BE .,tb,'+,,~.~~~x O
R ~ COMPACTED TO ENSURE ° " RECEMNG STREAM 5. A LEVEL SPREADER MUST BE INSTAU.EED CORRECTLY WiTH NO GREATER THAN 0.05% GRADE ON siaBlun PERMANENT POND ELEV.-417.50
- ;i - IFpR~ ~~~RIgUT~pN pf FLOW: OTHEWRWISE WATER WILL CHANNEUZE = , _ ° _ _ _ - - , ~ BELOW iRE S1Rl1Cil1RE AND BECOME A SOURCE OF EROSION.
~ ~ ~ I 3: t Max. VEGETanvE SHELF
GEO-TEXTILE FA~tIC ~ 5~X~'X~ F Y IS 0.2X 10:1 FROM an.a IO a16,o
' FOOTING ~~,gp~ppp~~ 1 X3 X3 CONCRETE 44,225SF OF 20''0• 30' 0' PERMANENT PGND ELEK-417.50
ONE 2 BU N 1 8U USE CLASSSIXRIPXRAP TEMPORARY POND ELEV.-419.50
8 HOPE OUTLET PIPE B"HOPE OUTLET PIPE - INTERIOR POND IM N SIDE SLOPE VARIES Q A/
HOPE OUTLET PIPE SBCTION 3:1 FROM 410.0 TO 417.0 Ili~i
TYPICAL NC. FLARED END SECTION ~ ~p~py 10:1 FROM 417,0 TO 418.0 O EMBANKMENT 3:1 FROM 418.0 io 420.00 ~ ~ .
o •o I ! RECEMNG STREAM N :n BOTTOM EL 410.0 O Z
18' HDPE 0 O.5X «MARSH TYPE PLANTS ~ ~ w
r , ,X . WITH ANTI-SEEP COLUR 8. COMP TO BE PLANTED AT PERMANENT 8' COMPACTED 6' CONCRETE PAD WRIER LEVEL AND
USt 1:L~51 KIF' KAi' INV. IN 411.75 INV. IN 411.25 STON! • _ OUTLETS 0 RIP RAP DISSAPATOR PAO STONE BASE AT fOREBAY EMBANKMENT SEE LANDSCAPING PLAN, SHEET C4 8~ ORIFlCE W/ FOR TYPE AND LOCAnONS
/ _ 1 ° (SEE PLAN FOR DETAILS) 8' OF _ ~~1 REINFORCED CONCR. Ain GALE VALVE ~ STEM ~ Z TO TOP OF STRUCTURE
INV. - - INV. 411.75
LEVEL ' Up _ , - - - - _ - _ ,;<<, - 3 LAYER OF X57 STONE Fl.oanNG BaFFLE NITH FLOW-THROUGH YANDOw **POND BOTTOM TO BE LINED WITH O TOP of BAFFLE TO BE AT TEMPORARY POOL ELEVAnoN-419.50 NATURAL CLAY TO THE P E R M A N E N T
SECTION A-A WET DETENTION POND - a=~~',. F n ~ n s 10'X1.5' FLOW 7HRWGH WINDOW TO BE At ELEV. 1417.0 WINDOWS TO BE ON OPPOSING ENDS of BAFFLES TO MAXIMIZE Fl.OW LENGTH POND ELEVATION . ENHANCE LINER WITH O
. ' ~ >~N vt>~r 1 20 (HORZ.) 1 5 (VERY ~ _ ;,L.4,~,.. _ , TYP. OF 1W0 IN MAIN POOL
R~~NN~~pp ED CONCR. BENONITE AS NECEEARY TO ENSURE SEAL ~
CWWN~ IPARIAN BUFFER
CONCR. LEVEL SPREADER UP MAINTENANCE ~~G
AFl'ER CONSTRUCTION AND UNTIL FULLY RE-VEGETATED, 1HE LEVEL SPREADERS NEED TO BE CAREFULLY INSPECTED FOR ANY SIGNS OF Q
CHANNEUZATION AND BE IMMEDIAlT1Y REPAIRED.. THE STRUCTURE WILL FAIL IF WATER IXTTS fROM IT AS CHANNEUZED FLOW! VEGETAID) TEMPORARY POND ELEY: 419. ¦ PR MAY R IRE PERIODIC MOWING. SP CONSTRUCTED OF NC URGING 3 DYER OF 57 STONE S FADERS READERS CO REIE C ALSO SW ASSOCIATED WITH LEVEL EQU ALES 1EMPORARY POND ELEV.-419.50 W 0
1~ N TO CHECK FOR Du1MAGE AND TO BE REPAIRED AS N ED. OVER TIM THE LEVEL SPREADER WILL FlLL WITH I PERT DIC INSPECIEO EED QU E, RE RE 0
:p:-:::.:::• TO BE CLEANED OUT TO MAINTAIN R5 CAPACITY. - SEDIMEM AND WILL NEED tn:cEranvE SHELF 1a1 FROM a17.a ro a111.a >::::~:;:::;:::s:;;;::;:::::~:::;;:::•::::::::~ ....::.~::..::e::.:-.:-::::.::-:::.~ o o
THE FORE&Y FROM BEHIND TH UP AND IN I TH NERSI 1. SEDIMENT AND DEBRIS SHOULD BE REMOVED FROM E LEVEL FROM S DE E D ON I301[ETRIC VIgN Q
RMS 11R THAN 2. IS AND AFTER ALL STO GREA C1UR AN ANNUAL BAS Q S1RU EON Z
CHECKED FOR SIGNS OF EROSION AFTER ALL EVENTS TO OR ER THAN TH - . 1HE SPREADER AND BUFFER SHODU) BE EQUAL LARG E 2 2 LEVEL CTION OF 57 STON SHODU) T (MOWS IN THE SE E BE REMOVED R VEG ATX)N THA YEA STORM ALL ET if
U E MAINTAINED. 3. 1HE GRASS IN ALL SWAU~ SHO Ul B a U VARIE_ d _DPE PERM N A ENT POND - EIEV 417.50 TEMPORARY POND ELEV: 41
( 0 ~57 N WASHING DOWN R ION T I ::::::sEgiiaEr%r::;;:'::'.:.:;`.:'.::~~ 9.50 INTERIOR POND SIDE SLOPE VARIES i1iZF;:;;:;;SEDIMEN.T(crr'r::'rE:?'r'ri'r1C'
LEVEL SPREADER 4. ANY FORMA110N OF GuWES EG. EVIDENCE F Sro E SLOPE) 0 EROS - THA S DISCOVERED IN THE BAFFLE 1 a -OUT- THROUGH THE ApPUCATK) OF EROSION CONTROL MAT OR RE GRADING IF NEC MUST B FFER SHOU BE ADDRES~D ESSARY U NOTI PRIOR TO ANY WORK IN PROTECTED BUFFERS . x 1 FROM 410.0 TO 417.0 AN- - 24 X 36 10:1 FROM 417.0 TO 418.0
N.T.S. BE FLED 3:1 FROM 418.0 to 420.00 N.T.S.
. 410.0 FLOATING BAFFLE N11H FLOW-THROUGH WINDOW ` * * P O N D BOTTOM TO B E LINED WITH TOP OF BAFFLE TO aE AT TEMPORARY POOL ELEVAnoN-419.50 EL 410.0 NATURAL CLAY TO THE PERMANENT
10'X1.5' FLOW 'MROUGH WINDOW TO BE AT ELEV. 3417.0 WINDOWS TO BE ON OPPOSING ENDS OF BAFFLES TO MAXIMIZE fLOW LENGTH $~F~ 2 POND ELEVATION . ENHANCE LINER WITH O7 MAY 07
SECTION B-B WET DETENTION POND TYP. OF TWO IN MAIN POOL BENONITE AS NECEEARY TO ENSURE SEAL
i"=20' HORZ. i"=5' VERY. ~ ) ~ 1998-0090
REVISIONS REVISIONS DETAIL
D '
20n$ No. DATE DESCRIPTION REV. BY No. DATE DESCRIPTION REV. BY SHEET
J APPI iPPROVED FOR 1 01 JUN 07 REV PER CHATHAM COUNTY JEg 2 JULY REV BAFFLE DETAIL REVIEW COMMENTS Q 08 BPP
pYE~R500 sz V1
a„ nt~pS 12 MAY 08 REV. WET POND TO PROVID gPP
CON% ONSTRUCTION © 1.10 SELF ~ `VX CIS -1)1) 31 U1 Q BPP Q Ph REV. HESE PLANS WERE USED FOR PERMITTING AND DO NOT REFLECT Q 16 JUN 08 ADD POND SECTION B/B
THESE PLANS WER CHANGE ORDERS ;HANGE ORDERS OR MODIFICATIONS MADE DURING CONSTRUCTION. REV. POND SECTIONS Q OF ® 26 JUN 08 ADD BAFFLE DETAIL BPP 8