20061214 Ver 2_Stormwater Site Plans_20070705

CONSTRUCTION SEQUENCE (FOR BMP #1) • SCHEDULE APRE-CONSTRUCTION MEETIN WITH THE TOWN
I CONSTRUCTION INSPECTOR AND ENVIRONMENTAL SPECIALIST
/ ~ (557-3938). • OBTAIN GRADING PERMIT FROM THE TOWN OF HOLLY SPRINGS. TOP SLAB
~ ~ • INSTALL SILT FENCE AND TREE PROTECTION FENCE AS SHOWN.
/ \ \ ~ \ ~I~ ~ JI . OBTAIN CERTIFICATE OF COMPLIANCE THROUGH AN ON-SITE 367.70 WEIR ORIFICE VOID SPACE ACE
l~ INSPECTION BY TOWN ENVIRONMENTAL SPECIALIST. ~ • PROCEED WITH THE GRADING FOR THE CONSTRUCTED WETLAND AND
~ ~ \ 1 ~ ~ \ ~ ~ ~ ~ ~~i% j ADD RISER WITH TEMPORARY SKIMMER AS SHOWN. 4'x4' PRECAST RCP BOX
• SEED AND MULCH DENUDED AREA WITHING 15 DAYS AFTER FINISHED ~ ` GRADES ARE ESTABLISHED. 1/4 "x 2" STEEL STRAP W/
• MAINTAIN SOIL EROSION CONTROL MEASURES UNTIL SITE IS 2 - 3/4,, ANCHOR BOLTS 2 STRAPS REQ'D
~ ~ \ \ ~ ~ ~ I PREMANENTLY STABLIZED. • REQUEST FINAL APPROVAL FOR REMOVAL OF EROSION CONTROL
~ I DEVICES BY TOWN ENVIRONMENTAL SPECIALIST.
~ \ ` ~ • REMOVE SKIMMER FROM RISER, SILT AND DEBRIS FROM BMP, AND ALL '0-RING' JOINT
I ~ OTHER SOIL EROSION CONTROL MEASURES AND STABILIZE THESE ARES. ORIFICE OUTLET ~ • ALL WETLAND PLANTS TO BE INSTALLED AT THIS TIME. 366.00 NORMAL POOL
~ ~ 1 \ \ ~ \ \ ~ \ ~ I ~ `~9p ~ ~ X100 TOHS~ ~ ~ NOTE:
/ \ ~9 \ \ \ \ \ \ ( ~ / /1 O, I ~ \ 1 I \ `I 2"x2" TEE TEE PLACE STEM SUPPORTS A3' FROM BASE
~ J I ~ ~ U F R ~ 1 1
\ ~ I ~ ~ JUNCUS EFFUSUS, ~ ~U S, JOINT SEALED WITH A-LOCK NEOPRENE GASKET CAST IN MANHOLE WALL
s~ / ~ ~ "SOFT RUSH" s
1 ~ ~ I ~ ~ \ ~ GROUT EACH SIDE
I ~ ~ FES INV - ~ 'I Q I 1 MANHOLE RING & COVER 111 CENTERED OVER
~ 363.29' ~ ~ ~ _ ~ , ~ , i SP~LL~ ~ 1 i ~11~ ~ r I I ~ 1 ' ~ DRAWDOWN VALVE \ 1~ 6" NRS GATE VALVE
~ ~ ~ ~ ~ ~ (S~E DET141L \ / l ~ I ~ THIS '1 ~ ~ I ~ \ ATTACH SKIMMER
~ I~ / ~ ~ ~ l ~ ~ ~ ~ 1 ~ \ 6"x2" TE <2" TE 62 LF - 30
L • r ~ I SH~ET) ( \ 1 ~ Iq s^ PRECAST FORPHA~EI OF PROJE~T I ~ 1 1 CONCRETE SLAB / / 6 / / / P/ / / / / / / / '0-RING' GASKETED
~ / 1 ~j / ~ CLASS III RCP Ca? 4.84%
* PERI~tI.~PE ~ .1~ ' ~ ~ J~ ~ ~ ~ ~ PANICSJtvt~ ~/IRGATUM ~ / ~ ~ ~ ~ VOID SPACE r~\ ,~\i~~\/,
- - - - - ~~ID STRUCTURES + ~ ~ ~ ~ ~ 1~ ~ /j SWITCH GRASS" ~ v `
/ ~~~-----*TEMP Q ~ ~ y _ I 100 YF~ \ PRECAST ~ ` J I REINFORCED BOX I ; ` a
,1 ~
PIPE V ~ ~ FLOOD - , _ ~ ~ + /
i - _ ~ ~ LI T ER , ~ ' TOP SLAB DETAIL RISER 8c DRAWDOWN D ~ ~ J DEVICE DETAIL
r ~ wrs ffrs
- _ ~ ~
~~~~1 I 50' NRB ~ - - \ + / / / BU ER ~ I~~~ ~ _ f` ~ - ~ / ( BMP #1 TO BE USED AS TEMPORARY SEDIMENT AND
l ~ ~ l SWM I r/ ~ % ~ X11 T~ €SM~- - _ ~ _ ~ I ~ ~ r-= _ . _ EROSION CONTROL DEVICE. UPON APPROVAL BY TOHS RCP RISER
(1 ~ BMP TO BE CONVERTED TO CONSTRUCTED WETLAND. TEMPORARY SKIMMMER
~ ~ ~ ~ RIP-R`AP ` ~ - ~ ~ ~ ~ ~ ~ ~ ~e, ~ ~ 100-YEAR R TOP OF DAM EL= 370.00
~ ~ Wf~TH LI~ER ~ SWM / ~ I 11 X111\ - - WATER LEVEL DURING STORM TOP SLAB ~ EL= 368.78' 3.78
~ / ~ I\ ~ ~ ~ ~ ESMT ~ ~ l/ 11 /l ~ 11~ / / l ~ ~ =1 I I-1 = I ~=1 I-1 I-III-I I I~ ~ MINIMUM SLOPE 3 1
l~ ~ ~ ~ I l l ~,ll ~ l I I I~ I III=III- - WATER QUALITY POOL I_ - i
I ~<< ' ~ ~ =III=, ~I I - PERMAN T ~I~~~ ~ \ -I I I,; ~I I Ii I I- POOL i MINIMUM SLOPE 2 1
~ I I~~ ~ =III-I
~ ~ ~ ~ ~ ~ i \ \ 1 DIMENSIONS ELEV. ~ I I, ~ ~I 11= ~ I 1=~... ~ -III. I I 1=-:. _ ARTH DAM
~ I ~ ~I J~ ~~o \ ~ ~ \ ~ I r ~ ~~o 6'~ II p NORMAL POOL 11,850 SF 366.00 ~-III=':..~ / ~ POND BOTTOM 604 SF 363.00 ~ ~ ~ ~ -
~ 1 ~ ~ I 1 / / / I TOP OF DAM WIDTH 10 Fr. 370.00 ' I I- -III-III-III,=„I I Ii I = / / ~ / NORMAL POOL ORIFICE 2" 366.00 _=„III-III-III- ~ . ,I I I~ ~ ~I RIP-RAP
I ` _ ~_l RISER SPILLWAY 4 - 4x12" 367.70 ANTI-FLOATATION DEVICE .III-~ I I--III-I I -DISSIPATER
WATER QUALITY POOL 0.53 AC-FT 367.70 L.=111,;,111,;,111„
~ TOP OF ANTI-FLOATATION 8'x8'x2' 362.00 ANTI-SEEP COLLAR
\ I I I~ ~ ~ I ~ ~ ~ / ~ ~O - TOP OF RISER 4'x4' RCP BOX 368.70
~ ~I ~ I I ~ I II II i ~ ~ I ~ + ~ ~ ~ ~ II ~ ~ ~ ~ ~ ~ I~~ ~ ~ it ~ ~ ~ OUTLET PIPE INVERT IN 30'~ RCP 362.00 ~ ~ ~ ~ OUTLET PIPE INVERT OUT 30" RCP 359.00
~ DRAIN VALVE ~k 363.00 WET POND BARREL
' ~ ~ 1. ~ ~ ~ ~ I I? Ii I~ ~ ~ ~ I I ~ r, ~ ~ ~ ~ ! ~ ~ ,1 ~k d• ckiuuFa w~ NFen (`R(1CC C~(`TI (1 !~TI (1^I 62 LF 30" RCP
i~ I i j~ I I I ~I i i it j~/ ~ ~ ~ .........r.~ .rte..... I~~ v v I . RCP 0 4.52%
I 1 I ~ ~ I I~ II I I I~ ~ ~ ~ r~ X / . NIS
~ ~ ~ I ~ I + i ill I I j I~~ ~ ~ it ~ ~ ~ I #4 REBAR 12" I III O.C. EACH WAY ~~2° PREFORMED JOINT
~ I I I i + I rlll / I ~ 1 ~ ~ ~ ~i ~ ~ ~ I IfIl1` \ FILLER, 12' WIDE ~ ~'I . 2 W=3'
l ~ ~ ~ ~ ~ ~ ~ l
~1\~ ~ ~ ~ ~ ~ I ~ y„ ~h
~ ~ ~ ~ 1 ~ ~ ~ + ~
~ ~ ~ 1 l~
y ~ ~ ~ 1 ~ J + ~ ~ \ GRAVEL BEDDING OR FILTER FABRIC WITH GRAVEL DISSIPATER (WIDTH of RIP RAP TO BE BANK TO
BANK. SEE BELOW FOR APRON SUMMARY)
9 / , • I i ~ l 1 ^ ~ ~ / i '
~ i / 2 W=3'
~ I / 8~ =~-JUNCUS EFFUSUS,
~ / ~ ~ \ i ~ ~ ~ \ \ / ~ / / i ~ J JUNCUS EFFUSUS, i I' I
~~SOFT RUSH~~ ELEVATION SECTION ~
~ , / ~ »SOFT RUSH" ~ ~ ~ , ~ ~ ~ 2000 PSF MIN. 1 ~ BEARING CAPACITY SEE BMP SECTION FOR SIZING DATA BENEATH COLLAR WITHOUT GRAVEL DISSIPATER
i ~ ~ TO NOTES
i~~~ i ~ ~ ~ ~ ~ J i~ / ~ / ~ ~ \ VE TYPICAL ANTI-SEEP COLLAR TYPICAL TO BE USED WHERE EXCESSIVE STORMWATER VELOCITIES PROHIBIT VEGETATIVE LININGS.
i ~ ~ , /
L OUTLET DITCH DETAIL
/ /~j ~ / / ~ i ~ ~ JUNCUS EFFUSUS, ~ , ~ ~ ~ ~ i ~ ~ "SOFT RUSH" ~ ~ ~ ~ ~ NT5
50 LF OUTLET ~ i ~ , ~ i ~ ~
DITCH ~ 0.5~ ~ ~ ~ PANICUM VIR (SEE DETAIL i ~ ~ / ~ / ~ ~ ~ "SWITCH GRA ~~THIS SHEET) ~ ~ ~ ~ J ~ ~I VIRGATUM,
GRASS" 4' 10' 4'
/ J / / i ~ , (SE i i ~ ~ ~ ~ ~ ~ ~i THI ~ i i i i i ~ ~ ~ TOP OF DAM = 370.00
~ ~ SPILLWAY = 369.00
/ ~ /C/ / ~ i 1 1 ~ i i ~ i L
/ / / i ~ RIP-RAP APRON SUMMARY:
\ ~ ~ ~ SPILLWAY DETAIL PERMANENT SOIL RI ~ N~ REINFORCEMENT MATTING W~ LE / NOTE: SKIMMER MAY VARY VENT AV SLIGHTLY FROM ILLUSTRATION ~ SCREEN ACCESSIBLE ST THROUGH DOOR WIDTH: BANK TO BANK
~ , , ~ / /,i LENGTH: 15' AVG STO N E O : 6"
~ ~ / ~ ~ STONE CLASS: B
/ ST \ STONE THICKNESS: 22"
/ / ~ ~ /
~ ~ OUTLET END; CONNECTION TO FLOAT
~ / / , i OUTLET PIPE OR RISER BARREL PIPE LONGER
/ / / / / / / ~ S K I M M E R DETAIL THAN SHOWN NOT INCLUDED WITH SKIMMER
~ ~ / O / / ~ / I / ~ FLEXIBLE JOINT SUPPLIED BY USER
~ ~ ~ ~
~ ~ BMP #1 PLANT LIST ~ ~4.~,r~ CAR % 0~, we ~I /
~ ~ ~s ~ WET MESIC-MESIC COMMUNITY (SATURATION LIMIT AND ABOVE) p' • O •
SEAL g e
~ ~ ~ l ~ ~ ~ ~ I Lji ~ i ~ ~ QUA. BOTANICAL NAME COMMON NAME SIZE SPACING 100 JUNCUSEFFUSUS SOFT RUSH 3GAL. 3'O.C. h~~y~-~'v~a~k~U~,LIp' Y
~ ~ ~ 40 PANICUM VIRGATUM SWITCH GRASS 3 GAL. 2' o.C. °~~~~s~~~~T~?'7~"NAT~RBRA~iCH 'Y 028421
FAG i NE~~ .,ti o~.
BMP #1 -CONSTRUCTED WETLAND BMP #1 -CONSTRUCTED WETLAf TIN PLAN 30 ° (PLAN G AND SEDGE COMMUNITY (NORMAL POOL TO HIGH WATER) CLAY LINER: F 00 WA~
GRAPHIC SCALE QUA. BOTANICAL NAME COMMON NAME SIZE SPACING
SCALE: 1 " = 30' o is 30 60 150 IRIS VIRGINICA BLUE FLAG BARE ROOT 18" O.C. THE CLAY LINER FOR THE CONSTR 300 LOBELLIA CARDINAUS CARDINAL FLOWER BARE ROOT 18" O.C. MEET THE FOLLOWING $PECIFICAT 300 RUDBECKIA SUBTOMENTOSA SWEET BLACK-EYED SUSAN BARE ROOT 18" O.C. • UNIFIED SOIL CLASSIFI • MINIMUM OF 40°k PAS 1 inch = 30 ft. HIGH MARSH WATER EMERGENT COMMUNITY (0"-9" DEPTH) MINIMUM PLASTICITY I CONSTRUCTED WETLAND SHALE BE AT LEAST 12" THICK AND 'ECIFICATIONS:
GRAPHIC SCALE CLASSIFICATION SYSTEM DESIGNATION OF CL, CH, ML, SC
30 0 75 30 60 *NOT SCALE: 1 " = 30' ;H WATER FROM 40% PASSING #200 SIEVE 6TICITY INDEX OF 12
TEMPORARY CPP PIPE TO CATCH WA 1 inch ~ 30 ft. SWELL PRIOR TO ENTRANCE INTO BM JB D-10 AND FES D-10 ARE PERM W HIGH MARSH [0-9 BELOW NORMAL POOL] (35~) - 4,148 SF STRUCTURES DESIGNED TO ADEQUATE LOW MARSH [9" TO 18" BELOW NORMAL POOL] (35%) - 4,143 SF THE FUTURE DEVELOPMENT. f0 BMP. • MAXIMUM PERMEABILI " QUA. BOTANICAL NAME COMMON NAME SIZE SPACING • A MINIMUM OF 2 TEST ~ 1000 PELTANDRA VIRGINICA ARROW ARUM BARE ROOT 18" O.C. THE CONTRACTOR ON ZMEABILITY OF 3.5X10"(-5) CM/SEC (0.05 IN/HR)
SAGITTARIA LATIFOLIA, "BROADLEAF ARROWHEAD" ° ° THELIA DEALBATA, "THELIA" )F 2 TESTS OF EACH ABOVE PARAMETER SHALL BE COMPLETED BY --TOR ON THE LINER MATERIAL AND PRESENTED TO THE
PERMANENT , 600 SAGITTARIA LATIFOLIA BROADLEAF ARROWHEAD BARE ROOT 18" O.C. ENGINEER FOR APPRO RDINAL FLOWER~~ 150 THALIA DEALBATA THALIA BARE ROOT 18" O.C. COMPACTION TO A MI Z APPROVAL.
QUATELY HANDLE v v v PELTANDRA VIRGINICA, "ARROW ARUM" LOBELLIA CARDINALIS, "CARDINA "ION SEE THE ~ SAURURUS CRENUS, "LIZARD'S TAIL" ~ IRIS VIRGINICA, "BLUE FLAG" I TO A MINIMUM OF 93% PER ASTM D698, AND WITHIN 0 TO 3%
OF THE OPTIMUM MOI LOW MARSH COMMUNITY (9"-18" DEPTH) 2500 SQ. FT.) 1UM MOISTURE CONTENT (1 COMPACTION DENSITY TEST PER
THE CLAY LINER SHALL BE PLACED PLACED UNDER THE BOTTOM OF THE WETLAND AND UNDER
r_~ FOR^INVERT,AND RIM INFORMATION S ~~~~r~T i-.~~ ~~~rrT n ~ rrT n QUA. BOTANICAL NAME COMMON NAME SIZE SPACING THE SIDE SLOPES TO AN ELEVATIO CLIAII DC ~I A/`Cfl /lA1 TllO lIC TLiL LEVATION OF 366 FT. A MINIMUM OF 8 INCHES OF TOPSOIL 13 I-NC TUC !`I AV I IkICD TUC TrlD !1C TUC TflD Cf'NlI CU A i l DC
OPEN WATER [36'' BELOW NORMAL POOL] (30%) - 39557 SF JIVKM UKHIIVHUt l.tiHKl vii ~ntti NO. fZeVISIOtI Date B Designer Scale 7370 PUNIEDEKIA(:UKDAIA YIC;KtKtL WttU KAKI KUUI 76 " V.L. ~~I I- I- DL rLn%.L v vim ivr yr I i I U_ F VI 1 1 1L %-L X I I- 11NL1%- I I IL 1 tlr VI 1 1 IL 1 VI .7VIL JI If-AL-L. IiL NN ON THE DRAWINGS AND/OR DETAILS. CARE SHALL BE TAKEN
CORDATA, "PICKEREL WEED" RUDBECKIA SUBTOMENTOSA, PISA PONTEDERIA "SWEET BLACK-EYED SUSAN 470 SAURURUS CERNUUS LIZARD'S TAIL BARE ROOT 18" O.C. FINISHED GRADE AS SHOWN ON T WHEN TRACKING IN THE TOPSOIL TOPSOIL TO NOT PUNCTURE OR DAMAGE THE CLAY LINER.
A DWQ COMMENTS 7 2/07 TLM TLM 1"=30' WOODCREE Drawn By Date VEN Sheet No.
EEK - LOCKLEY DRIVE EXTENSION STORMWATER HOLLY SPRINGS, NORTH CAROLINA
TLM 10/18/06 Checked By Job No. HO R MANAGEMENT DETAILS WITHERS RAV ENGINEERS I PLANNERS I SURVEY R V E Y 0 R S 10
111 MacKenan Drive Cary, North Carolina 27511 tel: [phone] fax: [phone]-6008 www.withersravenel.com
CHW 204232.20