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ASE 1 PLAN @0 50 II I ENGINEERS I PLANNERS I SURVEYORS 111 MacKenan Drive Cary, North Carolina 27511 tel; 919-469.3340 fax; 919-467.6008 www.withersravenel.com
~ HARNETT COl1NTY NORTH CAROLINA

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No. Date W&R 1"=100, PV151O Designer Scale BRIGi WATEr% B 10 TEUNNU L GY A ND STOWAWA LAW 07/09/10 Gt Sheet No. iWATER MANAGEMENT 'HASE CONCEPTUAL PLAN J 1 ENGINEERS I PLANNERS I SURVEYORS
Drawn By Date
s e
ecked By Job No. M EDICAL CENTER PHASE 1 INFRASTRUCTURE ~ FUTURE PHASI 111 MacKenan Drive Cary, North Carolina 27511 tel; 919469.3340 fax; 919.467.6008 www.withersravenel.com
HARNETT COUNTY NORTH CAROLINA. LGS 2090050:J01

/ ~ ••r. / / i ~ ~ 1 ~ ~ VEGETATED SIDE
~ / ~ / SLOPES 3:1
/ ~ ~ ~ / ~ / ,
/ ~ ~ 8 / TOP OF VEGETATED SHELF
P 100-YR WSE
~ 1 0 / F,~ , ~ ,r '1 / / / / G~ , / \ / / / / PERMANENT POOL
/ , v / / / Q,~ / ~ /
/ \ / / / q DUCTILE IRON PIPE / ~ TOP OFD M ucTILE IRON PIPE DEVICE BOTTOM OF VEGETATED SHELF TEMPORARY POOL {WQV) (SEE DETAIL THIS SHEET) VEGETATED SHELF 5.0'
/ ~ / / / 1 FT (SEE DETAIL THIS / ~ / / i I \ 1 O FT, 10:1
/ ~ / 1l 0 ~ / /
, ~ ~ / OUTLET INV = 164.79'
f r ,y,. ~ a~A;,~.
P 0 0 ED WEIR , ~ / 1 - - ~ - - - - - ~ / /~~i~~/~~/~~, ////r~ _ - ~i/i~~i:/ice/ice/ice/i~/~ ~i/;~/;//~//fir
~ WITH PE M NE T LINER ~ /
/ ~ ~ (SEE DETAIL) / / / / DEPTH
SIDE SLOPES ~ ~ _ - - ~~A, FOREBAY SIDE
~ t I
/ rs i ` ` 3:1 FOREBAY BOTTOM 5LOPES ~2:1 ~~j ~ i ~ (SEDIMENT CLEAN-OUT TOP)
/ I ~ / OUTLET PIPE I ~ is , / ~ / ° % 4" DIP, 42 LF p 0.50% F p 0.50% /j~/~.
1
/ f ~ ` DISSIPATOR PAD fl- _ _ 1 1 I ~-4„ ANTI-SEEP COLLAR / ! ~ I TAI THI H T - - ' j ~ (SEE DE L S 5 EE ) OLLAR CLAY LINER, SEE NOTES FOREBAY SEDIMENT CLEAN-OUT BOTTOM THIS 5HEET) BOTTOM OF POND I
/ r ~ V=1.5 FPS / / ~ CLASS BRIP-RAP CUTOFF TRENCH
ICH (SEDIMENT CLEAN-OUT TOP) IMENSIONS AND INSTAIlATiON
/ / f 4' x B' x i8" THK (LOCATION, DIMENSIONS AND IN ~ ( ) \ SHALL BE AS SPECIFIED BY TH SPECIFIED BY THE SEDIMENT CLEAN-OU7 80TTOM
/ ~ 1 ~ GEOTECNNICAL CONSULTANT FO / r' ! 1 / Q 1 / r \ L CONSULTANT FOR THE OWNER.)
/ / / ~ ! I
/ 1 ~ ~ 1 1 ' I WET PQND DETAIL
/ , ~ 1 / ~ NTS
J / 1
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~ ~ i ~ W / ! ! / , 1 DRAINAGE AREA = 4.89 AC
-rt / ~ ~ ,7 t~ O? / I / ~ ! ! PERCENT IMPERVIOUS = 51.1
~ T I I ~ ! P RMAN NT P IZiNG = 90% TSS 3 FT DEEP ~ ~ / 1 E E OOL S , 3 FT DEEP LINE WEIR WITH 10' ~ i
70 ~ ! \ , ~1 r I 1 ENKAMAT 7020 MAT
~ 1 / I P F R AY I NT OND/ 0 E8 SED ME WEIR ig^
1 ~ ! ` A - T TT M V. = 162.50' y i ~ ~ ~ CLE N OU , 80 0 ELE 1ti / i / ' f SEDIMENT CLEAN-OUT TOP ELEV.
lil ` ~ ~ , ~ r' ~ ~ ~ T F P F R AY = 1 3~
~ / \ / ~ (BO TOM 0 OND/ 0 EB } 63.50 Y- ~ / t ~C / Q NORMAL POOL ELEV. = 167.50
I ' J \ I ~ ~ ~ i WATER DUALITY ORIFICE ELEV. = 167.50
) ~ ~ \ / / ~ ~ 20' WIDE WEIR ELEV. = 168.60'
~~Q, ~ \ / t / / , r ~ 1 ZO ~ \ ~ X 1 / Q / TOP OF DAM ELEV. = 170.40 CROSS SECTION
~1 / \ / ~ ~ ® 100-YEAR WSE (rREEBOARD) = 169.32 (1.08'} ;1.Oa,)
/ \ r ~ 1 / / ~ / ~ / / y ~ 1 I
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~ ~ I i / ANTI SEEP COLLAR 2X2 ~ ! / / / 1 ~ / / - _ I l / / I / ~~T~ 3~ ~1 ~~f~~
f I / I ~ /
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! ! ! ~ / 1 1 1 SHALLOW WATER (NORMAL POOL TO 6 BELOW) 2,139 S.F. 50 HERB. PL _50 HERB. PLANTS ! 200 S.F. = 535 PLANTS NOTES; ROOT MAT EDGE
1 1 / PLANT TYPE QTY KEY BOTANICAL NAME COMMON NAME ROOT CALIPER l _ , OOT CALIPER'I HEIGHT NOTES 20'~ (MIN. 12"}
I I I ~ / / 54 Acorus calamus Sweet Flag CONT. 4" Pot / ~ / r- HERBACEOUS ONT. 4" Pot 24" O.C. ~ 1. EARTH BERM SHALL BE STA64LIZED W/ SEEDING ACCORDING
. / ~ I f 54 Acorus calamus 'Variegata' Variegated Sweet Flag CONT. 4" Pot ONT. 4" Pot 24" O,C. SPECIFICATIONS. LONGITUDWAL SECTION VIEW
54 Peitandra virginica Arrow arum CONT. 4" Pot ONT. 4" Pot 24" O.C. 2. SEE PLAN VIEW FOR MAT
105 Pontedaria cordata Pickerelweed CONT. 4" Pat ONT. 4" Pat 24" O.C. PLACEMENT LIMITS,
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30 0 is 30 6Q ® 54 Sagittaria Iatifoiia Broadleaf Arrowhead CONT. 4" Pot ONT. 4" Pot 24" O.C.
80 Saururus cernuus lizard s tail CONT. 4 Pot ONT, 4" Pot 24" O,C.
„ i inch - 30 ft. x 80 Schoenoplectus tabernaemontani Softstem Bulrush CONT. 4 Pot ONT, 4" Pot 24" O.C.
~4 REBAR 12"
SHALLOW LAND NORMAL POOL TO 6" ABOVE) = 2 297 S.F. 50 HERB. PL _50 HERB, PLANTS 1200 S.F. = 575 PLANTS O.C. EACH WAY 1/2" PREFORMED JOINT
( PLANT TYPE QTY KEY BOTANICAL NAME COMMON NAME ROOT CALIPER OOT CALIPER HEIGHT NOTES F~uER, t2" WtDE
58 Asciepias incarnata Swamp Milkweed CONT. 4" Pot ONT. 4" Pot 24" O,C.
HERBACEOUS 58 Carex stricta Tussock Sedge CONT. 4" Pot ONT. 4" Pot 24" O.C.
CONSTRUCTION SEQUENCE FOR WET DETENTION PONDS: 5s Hibiscus moscheutos Rose Mallow CONT. 4" Pot ONT. 4" Pot 24" O,C.
58 Iris versicolor Northern Blue Flag Iris CONT. 4" Pot ONT. 4" Pot 24" O.C.
1, ENSURE ALL APPLICABLE PERMITS ARE ACgUIRED PRIOR TO ANY CONSTRUCTION ACTIVITIES. 85 (ris virginica Southern Blue Flag Iris CONT. 4" Pot ONT. 4" Pot 24" O,C.
2. WHEN PERMANENT WET DETENTION PONDS ARE TO BE USED AS SEDIMENT BASINS TRASH RACK STEM GUIDE g5 )uncus effusus Soft Rush CONT. 4" Pot ONT. 4" Pot 24" O.C.
DURING CONSTRUCTION, INSTALL BASIN TO PERMANENT POND DIMENSIONS AS STRAP TO RISER SHOWN ON THEAPPROVED EROSION CONTROL PLAN. TOP OF FLANGE TO BE AT OR 115 Lobelia cardinalis Cardinal Flower CONT. 4" Pot ti.. ONT, 4" Pot 24" O.C.
3. DURING CONSTRUCTION, PROTECT STORM SEWER INLETS WITH INLET PROTECTION ABOVE WEIR ELEVATION 58 Scirpus cyperinus Woolgrass CONT, 4" Pot ONT, 4" Pot 24" O.C,
DEVICES, SEDIMENT DEVICES, AND10R OTHER APPROVED MEA5URE5. MAINTAIN
DEVICES AS NEEDED. 4, AFTER COMPLETION OF ANY PHASE OF GRADING, ESTABLISH GROUNDCOVER ON ELEVATION SECTION
GRADED SLOPES AND FILLS WITHIN 15 CALENDAR DAYS.
6. STABILIZE SITE AS AREAS ARE BROUGHT UP TO FINISHED GRADE WITH VEGETATION OR PAVING, 2000 PSF MfN,
6. CLEAN AND REMOVE SEDIMENT FROM POND AS NECESSARY DURING BEARfNG CAPACITY SEE 8MP SECTION FOR SIZING DATA 9ENEATH COLLAR
CONSTRUCTION, 4'~ BEND 7. WHEN CONSTRUCTION IS COMPLETE, REMOVE TEMPORARY DIVERSIONS, SILT TRASH RACK
FENCING, SEDIMENT BASINS, ETC. AND PROVIDE ADEQUATE COVER OR PAVE ANY TYPICAL ANTI-SEEP COLLAR
SULTINGBAREAREAS, WEt POND POOL=r6z5p (~5 REBAR) RE 8. COMPLETE CONVERSION TO PERMANENTWET DETENTION POND. CLEAN OUTALL (rNTER10R a" TEE rNVERr) 6"X4" TEE , , NTS
SEDIMENT, AND ENSURE PERMANENT OUTLET STRUCTURE IS CONSTRUCTED PER
THE APPROVED STORMWATPR MANAGEMENT PLAN; PERMANENT EROSION `
CONTROL DEVICES, SUCH AS VELOCITY DISSIPATERS, SHOULD BE INSTALLED AT THIS MJ PLUG W~ 2 : - W TIME. TAP ORIFICE ` . W / 3" NRS
J ~ ~ fl ~ . GATE VALVE
W 6 DIP PIPE 6 TEE > . SCREEN ACCESSIBLE
~ ADJUST FOR PROPER DRAW DOWN HEIGHT) 3 NRS ~ ( ~ . VENT THROUGH DOOR
GATE VALVE °
a 4" IP PIP D E BOTTOM DRAIN 0 I
a ATTACH TEMPORARY PIPE OUTLET
N SKIMMER
° CLAY LINER NOTES: ' b PIPE OUTLE ~ . w 4" DrP PIPE OUTLET=165.00 e , a
a MJ PLUG W/ 3" TAP a ° 0 1) SEASONAL HIGH WATER TABLE (SHWTy TO BE EVALUATED AT EACH BMP SITE e ~ „ ` A F~
a BY THE CONTRACTOR, IF THE PROPOSED PERMANENT POOL (WET POND POOL) ~ FLANGED BASE TEE F,
" F TH H TH Y INER WILL BE REQUIRED. a; ° ° ` ,y a.~. ; IS NOT WITHIN t6 0 E S WT, E ClA L a. , ~ 6X4 ECCENTRIC ° a n v NOTE:
2 THE. CLAY LINER FOR THE WET DETENTION BASIN SHALL BE AT LEAST 12" REDUCER r a , ° , ° " / ' ) a n ~ 4 SKIMMER MAY VARY
THICK AND MEET THE FOLLOWING SPECIFICATIONS: ° , ; ~ GROUT ~ ~ , ~ e ° ~ ~ ° POND BOTTOM {SEDIMENT t" SLIGHTLY FROM FLOAT " ` ~ ILLUSTRATION
UNIFIED SOIL CLASSIFICATION SYSTEM DESIGNATION OF CL, CH, ML,SC o •a a i ° d. CLEAN OUT}=163.00 - MINIMUM OF 40~ PASSING X200 SIEVE ° s ,o ° . ° $ a
" d ° ANTI-FLOTATION / MINIMUM PLASTICITY INDEX OF 12 ~ \
A I ITY F X1 S C 0.035 IN HR ° ~ ~ BLOCK ~ a MAXIMUM PERME B L 0 2.5 0 CM/ E ( / ) a , , a ° ; ° \ OUTLET ENO; CONNEC TfON
m A MINIMUM OF 2 TESTS OF EACH ABOVE PARAMETER SHALL BE COMPLETED ti 4 , ° ~4 ° a a o BY THE CONTRACTOR ON THE LINER MATERIAL AND PRESENTED TO eorroM rNVErzr = rs2.oo a . TO BOTTOM ORAIN OUTf.ET PIPE
THE ENGINEER FOR APPROVAL. COMPACTION TO A MINIMUM OF 93~ PER ASTM D898, AND WITHIN 3~ OF (4) 4" BOLTS BARREL PIPE LONGER THAN SHOWN NOT INClUDEO WITH SKIMMER
THE OPTIMUM MOISTURE CONTENT (1 COMPACTION DENSITY TEST PER 3-0" SUPPLIED BY USER °,~~`~q~i CH~~
2500 SQ. FT.) rtrt~ C ' 4 °°°0J °jO O J °
o THE CLAY LINER SHALL BE PLACED UNDER THE BOTTOM OF THE WET DETENTION = BASIN AND UNDER THE SIDE SLOPES TO A THICKNESS OF t1 INCHES. A 0 q
MINIMUM OF 6 INCHES OF TOPSOIL SHALL BE THE FINISHED GRADE AS SHOWN FLEXIBLE JOINT (NOT TO EXCEED 3' IN LENGTH) AL
` ON THE DRAWINGS AND/OR DETAILS. CARE SHALL BE TAKEN WHEN TRACKING IN o THE TOPSOIL TO NOT PUNCTURE OR DAMAGE THE CLAY. ACLAY/SOIL MIXTURE ~
i MAY BE USED IF THE ABOVE SPECIFICATIONS ARE SATISFIED AND WITH WRITTEN 0 TEMPORARY SEDIMENT DEVICE ° 13039 ' w °~HG~NE~~°
~ APPROVAL BY THE ENGINEER. DRAW DOWN SECTION A-A DEVICE PLAN VIEW 'IEW DEWATERING SKIMMER DETAIL , OFF I
L IJTS USE 3" SKIMMER W/ 2.5" HEAD (TYP.) '1-fS ,'~,~~~`GLENN~~~~~>`
v
0 3
m
i
Date Desi ner Scale No. Revision g t5 K 1 T E C
m W&R SEE ABOVE "hIGHTWATERK t5 u, ~i N L STORMWATEK kTER MANAGEMENT PLAN Sheet No,
o Drawn By Date g LAW 07/09/10
MEr SE 1 lh''FRASTRUCTU D"ICAL CENT E R P""" A N RE
o Checfced By Job No. BMP #1 ENGINEERS I PLANNERS I SURVEYORS 111 MacKenan Drive Cary, North Carolina 27511 tel: [phone] fax: [phone] www.withersravenel.com
o Lcs 2090050.0 HARNETT COUNTY NORTH CAROLINA Y

\ t /
~ ~ \ '
~ ~ ~ \
VEGETATED SIDE
~ SLOPES 3:1
- ' \ ' ~ i ~ / O ~
r ~ t TOP OF VEGETATED SHELF
100-YR WSE
PERMANENT POOL
~
~ ° TOP OF DAM DUCTILE IRON PIPE DEV LE IRON PIPE DEVICE BOTTOM OF VEGETATED SHELF 1 TEMPORARY POOL (WOV)
(SEE DETAIL THIS SHE ~ r t O FT DETAIL THIS SHEET) VEGETATED SHELF 5.0 10 FT, 10:1

~ OUTLET INV = 157.00 _
S • T ~ r,~%,~; ~ _ - J %
F ~ D r
, i~ - is ~ r- DEPTH
p - SIDE SLOPES
~ ~ i ~ > . ~ ~ \ FOREBAY SIDE \ \ . , ~ 3:1 FOREBAY BOTTOM
~ ~ , \ SLOPES X2:1 (SEDIMENT CLEAN-OUT TOP) j . %~%~/i. i
I / ~ / _ ®~~T ~ ~ OUTLET PIPE ~ 0.89% %i/,
~ / i' ~ ~ ~~.;;~~'i/~ 4" DIP, 56 LF 0 0.89% f ~ -
PROPOSE WEIR / DISSIPATOR PAD ANTI-SEEP COLLAR aR CLAY LINER, SEE NOTES FOREBAY SEDIMENT CLEAN-OUT BOTTOM SHEET) BOTTOM OF POND
WITH PERMANENT LINER ~=4" (SEE DETAIL THIS SHEET) V=1.9 FPS (SEE ETAII) ~ CLASS 8 RIP-RAP CUTOFF TRENCH (SEDIMENT CLEAN-OUT TOP)
~ D(50)=6" dSIONS AND INSTALLATION
~ i 4' x 8' x 18" THK (LOCATION, DIMENSIONS AND INSTAI SHALL BE AS SPECIFIED BY THE ECIFIED BY THE SEDIMENT CLEAN-OUT BOTTOM
- / / GEOTECHNICAL CONSULTANT FOR TI JNSULTANT FOR THE OWNER.)
~ 7
~ ' BMP 2 r ~ ~ rte' ~ \ WET POND DETAIL
~ NTS
G,
~ Pr \ ~r ~ \
~ ~i ~ ~ / ~ ~ ~ RAINA AREA = 2.31 ~ ~ ~rG ~ D GE = 2.31 AC
~ ~ ~ G C, PERCENT IMPERVIOUS = 31.E ~ ~ Pi P ~ ~ = 31.2%
~ _ % .0 ~ ~ , PERMANENT POOL SIZING 90 a = 90% TSS, 3 FT DEEP LINE WEIR WITH 10~
~ 4.19- r ~ ~ 9 _ g , ~ '~i ~ P i ~i y _ P ENKAMAT 7020 MAT WEIR. 18'°
F ti ~ ~ - r / T y ~ ~ ( POND/FOREBAY SEDIMEN
S 9 F I C~ ~ ~ ~ ~ ~ CLEAN-OUT, BOTTOM ELEV. = 156 = 156.00' ~y` ~
F ~ _ _ _ i ~ ~ SEDIMENT CLEAN-OUT TOP ELEV.
S ~ ,-'S ~ T ~ r---- - - . _ ` ~ r~ s ~ r (BOTTOM OF POND/FOREBAY} 5 = 157.00'
~ ` _ .,r _ ~ ~ i C ~ ® NORMAL POOL ELEV. - 161 = 161.50'
- ' i / ~ i ~ TI ~ ~ , I 1 " WATER DUALITY ORIFICE ELEV. = 161 = 161.50'
~ I I \ ~1~~ ~ , i ~ A ~ / ~ 20 WIDE WEIR ELEV. = 162 = 162.60' CROSS SECTION
r i s / ° t / TOP OF DAM ELEV. = 16~ ~ I = 164.10°
r - - / ~ ~ I iUU-7tAR WSE ( RD) 63 / / ~ - = 163.03' (1.07')
LINE WEIR WITH TURF REINFORCEMENT MAT.
r ~ ~ ~ 1 _ ~ 1 \ ® 4 OUTLET PIPE INVERT UP 157 \ „ = 157.50' ENKAMAT 7020 MAT
r C ~ ~,,I r~ ® 4 OUTLET PIPE INVERT DOWN = 157 = 157.00' ~ TOP OF DAM
I ~l " ~ / ~ i ! ~ ~ D t l ~ ~ - = 2'X;
i I b r \ \ / ANTI SEEP COLLAR i I I / ~~1 J ~ - 2'X2' ' .3•~ ~y` ' ~
~ I I ~ I I DITCH AND BURY
r - 1 1 I _ ~ _ r ( ~ / SHALLOW WATER (NORMAL POOL TO 6 BEL®W} 1,472 S.F. 5o HEf _ _ 50 HERB. PLANTS / 200 S.F. = 368 PLANTS R00T MAT EDGE
~ I I TY I A NAME COMMON NAME ROOT CAI PLANT TYPE Q KEY BOTAN C L ROOT ~ CALIPER HEIGHT NOTES ~ 20'-'~ (MIN. 12") 1, EARTH BERM SHALL BE STABILIZED
37 Acorus calamus Sweet Flag CONT. 4" CONT. 4" Pot 24" O.C. W/ SEEDING ACCORDING
HERBACEOUS - 37 Acorus calamus'Variegata' Variegated Sweet Flag CONT. 4" CONT. 4" Pot 24" O.C. SPECIFICATIONS.
37 Peltandra virginica Arrow arum CONT. 4" CONT. 4" Pot 24" O.C. 2. SEE PLAN VIEW FOR MAT LONGITUDINAL SECTION VIEW
GRAPHIC SCALE Z 30 0 is 30 60 ~ 73 Pontedaria cDrdata Pickerelweed CONT. 4" CONT. 4" POt 24" O.C. PLACEMENT LIMITS.
37 Sagittaria lancifolia Bufltongue Arrowhead CONT. 4" CONT. 4" Pot 24" O.C. ~R~~~
~ CONT. 4" Pot 24" O.C.
1 inch = 30 ft. 37 Sagittaria iatifalia Broadleaf Arrowhead CONT. 4" x CONT. 4" Pot 24" O.C.
5S Saururus cernws Lizard's fail CONT. 4" CONT. 4" Pot 24" O.C.
55 J Schoenopiectus tabernaemontani Softstem Bulrush CONT. 4" ~4 REBAR 12"
O.C. EACH WAY 1/2" PREFORMED JOINT
SHALLOW LAND (NORMAL POOL TO 6" A1300/E) = 1,608 S.F. 50 HEI 50 HERB. PLANTS / 200 S.F. = 402 PLANTS fruER, 12" WIDE
PLANT TYPE QTY KEY BOTANICAL NAME CQMMON NAME ROOT CAI ROOT CALIPER HEIGHT NOTES CONT. 4" Pot 24" O.C.
40 Asclepias incarnata Swamp Milkweed CONT. 4" CONSTRUCTION SEQUENCE FOR WET DETENTION PONDS: HERBACEOUS CONT. 4" Pot 24" O.C.
40 Carex stricta Tussock Sedge CONT. 4"
1 • ENSURE ALL APPLICABLE PERMITS ARE ACQUIRED PRIOR TO ANY CONSTRUCTION 40 Hibiscus moscheutos Rose Mallow CONT, 4" ACTIVITIES. CONT. 4" Pot 24" O.C.
R TO BE USED AS SEDIMENT BASINS 40 iris versicolor Northern Blue Flag Iris CONT, 4" 2. WHEN PERMANENT WET DETENTION PONDS A E CONT, 4" Pot 24" O.C,
DURING CONSTRUCTION, INSTALL BASIN TO PERMANENT POND DIMENSIONSAS TRASH RACK STEM GUIDE 60 Iris virginica Southern Blue Flag Iris CONT. 4" SHOWN ON THE APPROVED EROSION CONTROL PLAN. STRAP TO RISER CONT. 4" Pot 24'' O.C.
3, DURING CONSTRUC710N, PROTECT STORM SEWER INLETS WITH INLET PROTECTION T p OF F ANGE TO BE AT OR 60 )uncus effusus _ Soft Rush CONT• 4" CONT, 4" Pot 24" O.C.
DEVICES SEDIMENT DEVICES, ANDlOR OTHER APPROVED MEASURES. MAINTAIN 0 L ABOVE WEIR ELEVATION 82 Lobeiia cardinaiis Cardinal Flower CONT, 4" DEVICES AS NEEDED. CONT, 4" Pot 24" Q.C.
AFTER COMPLETION OF ANY PHASE OF GRADING, ESTABLISH GROUNDCOVER ON 40 Scirpus cyperinus Woolgras5 CONT, 4" 4. CONT, 4" Pot 24" O.C, a"
GRADED SLOPES AND FILLS WITHIN 15 CALENDAR DAYS. ELEVATION SECTION
5. STABILIZE SITE AS AREAS ARE BROUGHT UP TO FINISHED GRADE WITH VEGETATION OR PAVING..
6. CLEAN AND REMOVE SEDIMENT FROM POND AS NECESSARY DURING 2000 PSf MIN.
CONSTRUCTION. 4" N CONSTRUCTION IS COMPLETE REMOVE TEMPORARY DIVERSIONS, SILT BED WHEN I~~ TRASH RACK SEARING CAPACITY SEE BMP SECTION FOR SIZING DArA SENEATN COLLAR
FENCING, SEDIMENT BASINS, ETC, AND PROVIDE ADEQUATE COVER OR PAVE ANY
RESULTING BARE AREAS. kl 5 REBAR COMPLETE CONVERSION TO PERMANENT WET DETENTION POND. CLEAN OUT ALL WEr POND POOL=161, 50 h' , < , ~ TYPICAL ANT!-SEEP COLLAR
6' (iNTERtaR 4" TEE INVERT) SEDIMENT, AND ENSURE PERMANENT OUTLET STRUCTURE IS CONSTRUCTED PER , Nrs
THE APPROVED STORMWATER MANAGEMENT PLAN. PERMANENT EROSION ` ~ , EVICES SUCH AS VELOCITY DISSIPATERS, SHOULD BE INSTALLED AT THIS a ° ~ 3" NRS
W CONTROL D MJ PLUG W~ ~ ~ TIME. SATE VALVE
TAP ~~I !~E a . SCREEN AGC~aSIBIr~
a " VENT THROUGH ODOR
~ IP PIP ~ 6D E
' ADJUST FOR PROPER DRAW DOWN HEIGHT d ( ) 0
~R TRI 6" TEE PIPE OUILET r
6X4 ECCEN C 3 NRS N REDUCER •
GATE VALVE 4 t} ~ ° CLAY LINER NOTES
° h tl ~ 11 •1 4 DIP PIPE BOTTOM DRAIN A ~ . ~ A
1) SEASONAL HIGH WATER TABLE {SHWT) TO BE EVALUATED AT EACH BMP SITE _ ATTACH TEMPORARY
8Y THE CONTRACTOR, IF THE PROPOSED PERMANENT P006 (WET POND POOL) ~ IS NOT WITHIN #8 OF THE SHWT, THE CLAY LINER WILL BE REQUIRED. ,~_„r SKIMMER ~ ~ „ NOTE.
r o PIPE OUTLE SKIMMER MAY VARY
Y INER FOR THE WET DETENTION 9ASIN SHALL BE AT LEAST 12" a" piP PIPE oUrLEio15750 a 2) THE CLA L d . ' ~ q 0. a`` ~ ° THICK AND MEET THE FOLLOWING SPECIFICATIONS: MJ PLUG W/ 3 TAP 1 SLIGHTLY FROM FLGAT
~ UNIFIED SOIL CLASSIfICAT10N SYSTEM gESIGNAT10N OF Cl, GH, ML,SC ~ d~ 1 POND BOTTOM (SEDIMENT ' e A9.o,• d e9 e . " ILLUSTRATION
CLEAN OUT)=157,00 a MINIMUM OF 40~ PASSING X200 SIEVE ~ , a ° MINIMUM PLASTICITY INDEX OF 12 '
° AXI M PERMEABILITY OF 2.5x10 CM SEC 0.035 IN/HR) I ~ ^ 4 a :a . ~ o. M MU / ( G OP Y " a FLANGED BASE TEE OUTLET END; CONNECTION
~ A MINIMUM OF 2 TESTS OF EACH ABOVE PARAMETER SHALL BE COMPLETED a ~ o " "e a ; m I R AT RIAL AND PRESENTED TO BOT70~i INVERT=}56.OD ° • ° a d r0 80rTOM DRAIN OUTLET PIPE
° BY THE CONTRACTOR ON THE LNE M E THE ENGINEER FOR APPROVAL. GROUT BARREL PIPE LONGER THAN SHOWN NOT INCLUDED WITH SKIMMER tt~~~"""''
~ COMPACTION TO A MINIMUM OF 93Sb PER A5TM D698, AND WITHIN 3~ OF (4) 4" BOLTS " SUPPLIED BY USER ~,,~0~~~1°CA
THE OPTIMUM MOISTURE CONTENT {t COMPACTION DENSITY TEST PER 3-o ANTI-FLOTATION BLOCK 2504 SQ. FT.) a°° EJJ ° ~ i
o THE CLAY LINER SHALL BE PLACED UNDER THE BOTTOM OF THE WET DETENTION ° '9
BASIN AND UNDER THE SIDE SLOPES TO A THICKNESS OF 12 INCHES. A 0 MINIMUM OF 8 INCHES OF TOPSOIL SHALL BE THE FINISHED GRADE AS SHOWN AL ° FLEXIBLE JOINT (NOT TO EXCEED 3' EN LENGTH)
ON THE DRAWINGS AND/OR DETAILS. CARE SHALL 8E TAKEN WHEN TRACKIN I 3039
THE TOPSOIL TO NOT PUNCTURE OR DAMAGE THE CLAY, ACLAY/SOIL MIXTURE TEMPORARY SEDIMENT DEVICE °°'~~crNE~R°°~:'
® MAY BE USED IF THE ABOVE SPECIFICATIONS ARE SATISFIED AND WITH WRITTEN APPROVAL BY THE ENGINEER. DRAW DOWN SECTION A-A DEVICE PLAN VIEW ~ VIEW DEWATERING SKIMMER DETAIL ~"'~~F GlE~1~
PATS '''~a„~~~~~~~~,~,
t NTS a USE 3" SKIMMER W/ 2.5" HEAD (TYP.)
`v 0 3
L
m o
Nod Rev 1 n Date Desisner Scale W&R SEE ABOVE rt54' r K" I G"HTWATER rt-5"1U,`TEk.,tiNOLOGY NU STO VATER Sheet No.
o Drawn By Date
o LAW 07/09/10 "ICAL "E"TER PHASE 1 INFRASTRUCTURE
m Checked By Job No. MEU BMP #2 ENGINEERS I PLANNERS I SURVEYORS 111 MacKenan Drive Cary, North Carolina 27511 tel; 919.469-3340 fax; 919.467-6008 www.withersravenel.com
NTY NORTH CAROLINA IFE Lcs 2090050.0 HARNETT COU _ ,

/ 1 ~ 1
/ \ ~ ~ i/ VEGETATED SIDE SLOPES 3:1
R \ ` _
i wA \ ~ - R', r°
TOP OF VEGETATED SHELF 100-YR WSE
~ ~ ~ 1 \ ~ ~ ~ I / \ \ \ / PERMANENT POOL
l ~ t ,d / / I \ \ / ~j TOP OF pAM DUCTILE IRON PIPE CTILE IRON PIPE DEVICE TEMPORARY POOL (WOV)
i / A \ \ ~ / ~ 10 FT (SEE DETAIL THIS ~ SEE DETAIL THIS SHEET) $OTTOM OF VEGETATED SHELF VEGETATED SHELF 5.0'
~ i t ! i i ~ I ~ ~ t / 10 FT, 10:1
~ ~ I ~ ! / OUTLET INV = 163.69' ~ . _
1 \ _ / I f i! "iii„~/i: ~ , _ ! _ _ _ _ _ _ \/~~~/j\~ _ _ - _ - ~~---------------T __~//~/j~/~~/j/r
, / ` / r, , / y , //~\//~A//AA//AA, - -
\ 1 ~ ~ ~
~ ~ ~ / _ , t t /
/ ~ \ t t ~ DEPTH \ \ ;
/ ~ J ~ ~ ~ ~ o / \ i / ~ SIDE SLOPES ~ , ~ / 3:1 FORE$AY SIDE FORE$AY BOTTOM
;~A. _ . ~ >~A~v~ SLOPES ~2:1
~ \t \ ~ ~ J OUTLET PIPE /,//~/,~/,~i ' (5ED(MENT CLEAN-OUT TOP}
~ ~ 4" DIP, 43 LF ~ 0.50% \ J ~t J %/i,/i
t ~ \G/ J DISSfPATOR PAD ANTI-SEEP COLLAR ,L~qR CLAY LINER, SEE NOTES FOREBAY SEDIMENT CLEAN-OUT BOTTOM
~ ~ - \ / J ~=4 (SEE DETAIL THIS SHEET) GIs sHEET} BOTTOM OF POND
\ t 'v'p Z / CLASS BRIP-RAP 77` ~.1 `V /l'~ CUTOFF TRENCH :H {SEDIMENT CLEAN-OUT TOP)
~ \ ~,J / (LOCATION, DIMENSIONS AND INS ~ J G 4' x 8' x 18" THK 5HALL BE AS SPECIFIED BY THE PENSIONS AND INSTALLATION SPECIFIED BY THE SEDIMENT CLEAN-OUT BOTTOM
~ ~ ~ ~ I\ ~ P/ P ~ / GEOTECHNICAL CONSULTANT FOR \ / CONSULTANT FOR THE OWNER,)
r p ~ / Q ~
\ t ~ /P P / \ J ~ / ~ / J " / ~ WET POND DETAIL
J tl / f NTS
t ~ V / / J
~~J ~ / ! I 1,,~ \ J I
I QJ J
t 1 ~ PROPOSED WEIR / DRAINAGE AREA = 5.. = 5.28 AC
t i ~ WITH PERMANENT LINE 1 P TIP - ERCEN M ERVIOUS - 3C = 30.3
t \ ~ (SEE DETAIL} J t _ t i PEnM~sVclv~ POOL SIZING - 9C ~ ~ I = 90% TSS, 3 FT DEEP LfNE WEIR WITH -r°{- to' ENKAMAT 7020 MAT
° I WEIR 18^
~ ~ - \ ~ POND FOREBAY SEDIMENT 1 1 / 1 I \ ~ CLEAN-OUT, BOTTOM ELEV. = 1 E
r t ) \ ~ ~ SEDIMENT CLEAN-OUT TOP ELEV. = 161.00' 1
t I ~ ~ (BOTTOM OF POND/FOREBAY) = 1 E = 162.OO'
t 1 1 ~ NRA P = 1 i _ ~ ~ 0 M L OOL ELEV. E = 166.50'
~ J ~ - ~ 1" WATER QUALITY ORIFICE ELEV. = 1E = 166.50'
t ~ \ ~ i t t ~ ~ ~ ~ 20' WIDE WEIR ELEV. = 1E = 167.60' CROSS SECTION
i r 1 / ~ ~ TOP OF DAM ELEV. = 1E = 169.40'
1 i ~ t ~ / I ~ \ \ 100-YEAR WSE (FREEBOARD) = 1 E = 168.33' (1.07')
LINE WEIR WITH TURF
I / ~ \ ~ ~ „ I t / ( ~ ~ 4 OUTLET PIPE INVERT UP = 1E = 163.90' REINFORCEMENT MAT.
~ 4 OUTLET PIPE INVERT DOWN - 1 E / / ~ ~ \ = 163.69' ENKAMAT 7020 MAT
/ ~ \ ~ TOP OF DAM
I ( / ~ ? ~ ~ ~ ANTI-SEEP COLLAR = 2'. ~ i ! / ~ ~ = 2'X2' 3.~
~ / / ~ I / r ` , \ ~
I / ~ ~ ~ DITCH AND BURY
I I I i / ~ ~ ~ SHALLOW WATER (NORMAL POOL TO 6" BELOW) = 1 827 S.F. 50 HERB. / , 50 HERB. PLANTS / 200 S.F. = 457 PLANTS NOTES: ROOT MAT EDGE
I I 1 / / V \ ~ PLANT TYPE TY KEY BOTANICAL NAME COMMON NAME ROOT CALIPE ROOT CALIPER HEIGHT NOTES ~ 20'~ (MIN, t2")
I I / ( / / \ ~ ~ ° 45 Acorus cafamus Sweet Flag CONT. 4" Pol I I / / ~ HERBACEOUS CONT. 4".Pot 24"O.C. 1• EARTH GERM SHALL BE STABILIZED W/ SEEDING ACCORDING
( I / 45 Acorus calamus Vanegata' Variegated Sweet Flag CONT, 4 Pol ~ CONT. 4" Pot 24" O.C. SPECIFICATIONS.
( / / ~ ~ ~ ~ 45 Peltandra virginica Arrow arum CONT. 4" Pnl I / / ~ ~ CONT. 4"Pot 24" ac. LONGITUDINAL SECTION VIEW 2, SEE PLAN VIEW FOR MAT
( I ~ ~ / ~ ~ ~ 92 Pontedaria cordata Pickerelweed CONT. 4 Pol / ~ ~ ~ CONT. 4" Pot 24" O.C. PLACEMENT LIMITS.
~ ~ X ~ ~ ~ 45 Sagittaria lancifo(ia Bulltongue Arrowhead CONT. 4" Pal CONT. 4"Pat 24" o,C. WEIR DETAIL
~ ~ / ~ ~ \ ~ ~ 45 Sa ittaria latifolia Broadleaf Arrowhead CONT, 4" Pot CONT, 4" Pot 24" O.C.
1 ~ \ ~ \ ~ ~ 70 Saururus cernuus Lizard's tail CONT. 4" Pot 1 ~ ~ \ CONT. 4" Pot 24" O,C,
~ ~ ~ ~ , - ~ \ ~ 70 Schoenoplectus tabernaemontani Softstem Bulrush CONT. 4" Pot CONT. 4" Pot 24" O.C.
t
SHALLOW LAND NORMAL POOL TO 6" ABOVE} = 1 984 5,F. 5o HERB. ( , 50 HERB. PLANTS / 200 S.F. = 496 PLANTS J/4 REBAR 12"
PLANT TYPE QTY KEY BOTANICAL NAME COMMON NAME ROOT CALIPE ROOT CALIPER HEIGHT NOTE5 O.C. EACH wAY r/2" PREFORMED JOINT
50 Ascle ias incarnata Swamp Milkweed CONT. 4" Pol GRAPHIC SCALE Z HERBACEOU5 p CONT. 4" Pot Z4" O.C. FILLER' a2" WIDE
30 0 is 3o ea 50 Carex stricta Tussock Sedge CONT. 4" Pot CONT. 4" Pot 24" O.C. ~~'t~
" I 50 Hlblscus mosche~tos Rosh Mallow CDNT~ ~ Po o CONT~ Pot Q~C,
t inch . 30 ft. 50 Iris versicolor _e-__._m~_. Nprthern Blue Flag Iris CONT, 4 Pal coNT. 4° Pot aa° o,c,
74 Iris vlrgmlca Southern Blue F{ag Iris CONT. 4" Pol CONT. 4" Pot 24" O.C.
74 Juncus effusus s Soft Rush CONT. 4" Poi CONT. 4" Pot 24" O.C.
98 Lobeiiacardinalis Cardinal Flower CONT. 4" Pot CONT. 4" Pot 24" O.C.
50 Scirpus cyperinus tNooigrass CONT. 4" Pay CONT. 4" Pat 24" O.C.
TRASH RACK STEM GUIDE G®NSTRUCTION SEQUENCE FOR WET DETENTION PONDS: STRAP TO RISER s"
Y N TRUCTI N TOP OF FLANGE TO BE AT OR 1. ENSURE ALL APPLICABLE PERMITS ARE ACQUIRED PRIOR TO AN COS O ABOVE WEIR ELEVATION ACTIVITIES, ELEVATION SECTION
2. WHEN PERMANENT WET DETENTION PONDS ARE TO BE USED AS SEDIMENT BASINS
DURING CONSTRUCTION, INSTALL BASIN TO PERMANENT POND DIMENSIONS AS SHOWN ON THE APPROVED EROSION CONTROL PLAN. 20D0 PSF MIN.
3. DURING CONSTRUCTION, PROTECT STORM SEWER INLETS WITH INLET PROTECTION BEARING CAPACITY SEE BMP SECTION FOR SIZING DATA BENEATH COLLAR
I T DEVICES ANDIOR OTHER APPROVED MEASURES. MAINTAIN TRASH RACK DEVICES, SED MEN , DEVICES A5 NEEDED. 5 REBAR
4. AFTER COMPLETION OF ANY PHASE OF GRADING, ESTABLISH GROUNDCOVER ON 4" BEND ~ ' . 1YP1CA1 ANSI-SEEP COLLAR
GRADED SLOPES AND FILLS WITHIN 15 CALENDAR DAYS, ~ ~ ' 5. STABILIZE SITE AS AREAS ARE BROUGHT UP TO FINISHED GRADE WITH VEGETATION ` ~ • ~ ~ NTS
WET POND POOL=166.50 °w ' OR PAVING. a,. 3" NRS
~ ARYD RING (tNTER10R 4" TEE iNVERr) ~a , ' . 6, CLEAN AND REMOVE SEDIMENT FROM POND AS NECESS U , . ' ~ GATE VALVE
W CONSTRUCTION. . , L WHEN CONSTRUCTION IS COMPLETE,REMOVE TEMPORARY pIVSRSIQNS, SILT ~ ~ ~ ~Ni ~ SCREEN ACCE~5I~LE
~ FENCING, SEDIMENT BASINS, ETC. AND PROVIDE ADEQUATE COVER OR PAVE ANY MJ PLUG W/ 1 ~ e 4, ' VENT THROUGH DOOR
~ RESULTING BARE AREAS. TAP ORIFICE ~ .
~ 6. COMPLETE CONVERSION TO PERMANENT WET DETENTION POND. CLEAN OUT ALL a T E IS G NSTRUCTED PER N SEDIMENT, AND ENSURE PERMANENT OUTLET S RUCTUR 0 6° DIP PIPE
a THE APPROVED STORMWATER MANAGEMENT PLAN. PERMANENT EROSION M
NTR L DEVICES SUCH AS VELOCITY DISSIPATERS, SHOULD BE INSTALLED ATTHIS ADJUST FOR PROPER DRAW DOWN HEIGHT 3 NRS PIPE OUTLET N CO 0 ( ) o TIME. " „ GATE VALVE ^
° 6X4 ECCENTRIC 6 TEE ~ ~ a
REDUCER " a ~ , o CLAY,,,_j,INER NOTES: BOTTOM DRAIN A ~ , A
ATTACH TEMPORARY • d , ~ ` '~I ~ . .
~ 1) SEASONAL HIGH WATER TABLE (SHWT) TO BE EVALUATED AT EACH BMP SITE SKIMMER 4. . NOTE:
o BY THE CONTRACTOR. IF THE PROPOSED PERMANENT POOL (WET POND POOL) PIP T " ° TH TH Y ( R WILL BE REQUIRED. 4" DiP PIPE OUTL€T=163,90 E OU LE IS NOT WITHIN tfi OF E SHWT, E CLA l NE SKIMMER MAY VARY
;i :n._ . ~ _ ~ MJ PLUG W/ TP~~ ~LIOWTL ~R~C~ FLOAT
• # 2) THE CLAY LINER FOR THE WET DETENTION BASIN 5HALL BE AT LEAST 12" ' ' ' II~L<,ISTRATIQN
I T TH FLOWING 'SPECIFICATIONS; - - THgK AND MEE E O L " -0 . A.'~' » . ~ „ 4. ~ UNIFIED SOIL CLASSIFICATIGN SYSTEM DESIGNATION OF CL, CH, ML,SC ' d' ~ ; , • ~ ~ ~ A~. ~ ~ , ~ , \ POND BOTTOM SEDIMENT 4 DIP PIPE , , , ~ ~ ! / ( ~ wa
a MINIMUM OF 40~ PASS?NG X200 SIEVE m , • . , . ~ ~.d'~ : ~ • , ~ ~''s ' CLEAN aur~~lss,oo OU1`LET ENO; CONNECTfON
~ MINIMUM PLASTICITY INDEX OF 12 ' 4 ~ FLANGED BASE TEE / f~' ~ 4 A / t $ MAXIMUM PERMEABILITY. OF 2,5X10 CM/SEC (0,035 IN/HR) ~ ~ ~ a , a, ~ • ~ , , / TO BOTTOM DRAIN OUTLET PIPE
A MINIMUM OF 2 TESTS OF EACW ABOVE PARAMETER 5HALL t3E COMPLETED ~ ° ° aorroM rNVERr=1s2,oo 1 . 6 ~ ° BARREL PIPE LONGER TWAN SI~OWN
N BY THE CONTRACTOR ON THE LINER MATERIAL AND PRESENTED TO GROUT THE ENGINEER FOR APPROVAL. (4) BOLTS ANTI-FLOTATION BLOCK NOT INCLUDED WITH SKIMMER ' SUPPLIED BY USER ~~~~t~oiioii~rr~ii
o COMPACTION TO A MINIMUM OF 93% PER ASTM D698, AND WITHIN 39~ OF
THE OPTIMUM M015TURE CONTENT (1 COMPACTION DENSITY TEST PER 3'_p^ e r a°o` fee
a 2500 SO. FT,) THE CLAY LINER SHALL BE PLACED UNDER THE BOTTOM OF THE WET DETENTION FLEXIBLE JOINT (NOT TO EXCEED 3' IN LENGTH) o AL ~'q
BASIN AND UNDER THE SIDE SLOPES TO A THICKNESS OF 12 INCHES. A
MINIMUM OF $ INCHES OF TOPSOIL SHALL BE THE FINISHED GRADE AS SHOWN e, 13039 TEMPORARY SEDIMENT DEVICE ~,~;~cINE.~~°°~~;,
a ON THE DRAWINGS AND/OR DETAILS. CARE SHALL BE TAKEN WHEN TRACKING IN ~ THE TOPSOIL TO NOT PUNCTURE OR DAMAGE THE CLAY. ACLAY/SOIL MIXTURE DRAW DOWN SECTION A-A DEVICE PLAN VIEW IIEW DEWATERING SKIMMER DETAIL - e•seeeee ~
= MAY BE USED IF THE ABOVE SPECIFICATIONS ARE SATISFIED AND WITH WRITTEN
a APPROVAL BY THE ENGINEER. v USE 3° SKIMMER W/ 2.5" HEAD (TYP.) IJTS ~~~~'F1GlE~~,`'~~~``
0 a s
m
No. Date B Designer Scale W A o Revision
W&R SEE ABOVE %,jU Y ANu STORMWATER 0 ATER MANAGEMENT PLAN Sheet No.
o Drawn By Date
g LAW 07/09/10 INFRASTRUCTURE MEDICAL CENTER PHASE 1 m Checked By Job No.
Lcs 2090050.0 HARNETT COUNTY NORTH CAROLINA BMP #3 ENGINEERS I PLANNERS I SURVEYORS 111 MacKenan Drive Cary, North Carolina 27511 tel: [phone] fax: [phone] www.withersravenel.com
Y

i _ VEGETATED SIDE SLOPES 3:1
X12 ti,~ ~ ~ _ _ _ TOP OF VEGETATED SHELF 100-YR WSE
~ ~ ~
~ \ ~ r ~ , ~ ~ ~ ~ ~ ~ Z ~1~ PERMANENT POOL
/ ~ v'~2 ~ . )UCTILE IRON PIPE DEVICE TEMPORARY POOL (WQV)
/ n _ TOP OF DAM DUCTILE IRON PIPE , 1~ ~ y ~ ~ 10 FT (SEE DETAIL THIS (sEE DETAIL THIS SHEET) BOTTOM OF VEGETATED SHELF VEGETATED SHELF 5.0°
\ 1 ~ 10 FT, 10:1
1 ~ / ~ \ 1, / I ~ ~ OUTLET !NV = 156.70 _
r- / ~ ~ / ~~/i /%~/i~~i ~%iA/i~~~%%~i. i' ~ \

- ,
+a / ~ ~ / i
~ \ ~ DEPTH - - -
~ - \ ~ ~ \ \ \ - - - SIDE SLOPES
~ 3:1 F~ OPES S12 1 FOREBAY BOTTOM
~!'~~i'~; T T PIP / ~ ~ , OU LE E j~%j\ i ~ (SEDIMENT CLEAN-OUT TOP)
- - - - - - \ _ _ \ /i~ /i. 4" DIP, 60 LF p 0.50 ' ~ ~ jA/Aj/~/ LF p 0.50 fi
/ ~ / ~ \ - - - _ - ~ - _ ~ ~ \ ~ DISSIPATOR PAD COLLAR CLAY LINER, SEE NOTES FOREBAY SEDIMENT CLEAN-OUT BOTTOM
\ ~ 7 _ \ 0_4„ ANTI-SEEP COLLAR _ i ~ ~ ~ V=i. FP (SEE DETAIL THIS SHEET} 5 S THIS SHEET} BOTTOM OF POND
/ % f ~ CLASS BRIP-RAP NcH (SEDIMENT CLEAN-OUT TOP)
~ ` D(50}=6" CUTOFF TRENCH \ / ~R6P05ED WEIR 4' x 8' x 18" THK (LOCATION, DIMENSIONS AND i DIMENSIONS AND INSTALLATION S SPECIFIED BY THE SEDIMENT CLEAN-OUT BOTTOM
~ / TWIT MANENT LINER SHALL BE AS SPECIFIED E3Y T 4L CONSULTANT FOR THE OWNER.)
~ U' / E DETAIL GEOTECHNICAL CONSULTANT f1
/ ~ i WET POND DETAIL
/ Q- NTS
~ ~
I lb , ~ ~
I '
v ' I ° ° ~ DRAINAGE AREA = = 5.45 AC
I ~ ~ PERCENT IMPERVIOUS = 65.1
\ ' ~ i ~ , r ° ° ~ ~ PERMANENT POOL SIZING = = 90~ 7SS, 3FT DEEP
~ ~ ~ ~ LINE WEIR WITH t0' ENKAMAT 7020 MAT
\ ~ \ ~ - POND/FOREBAY SEDIMENT WEIR 18.'
~ ~ ~ ~ 6 ~ ~ CLEAN-OUT, BOTTOM ELEV. ~ ~ ~ ~ , = 153.50' ~
\ ~ ~ ~ ~ 'Q / S SEDIMENT CLEAN-OUT TOP ELEV. \ \s\~ \ 0 ~ _ J. - 154.50°
~ ~ ~ ~ (BOTTOM OF POND/FOREBAY) ~ N R A P O V. ~ \ ~ ~ ~ _ OML OLELE - = 158.50'
~ ~ \ ` ~ ~ ~ ~ ~ / 1 WATER QUALITY ORIFICE ELEV. _ = 158.50'
~ ~ ' 20' WIDE WEIR ELE'd, _ = 159.80'
\ ~ ~ ~ TOP OF DAM ELEV. - = 162.00' CROSS SECTION
~ - 100-YEAR WSE (FREEBOARD) - = 160.70' (1.30')
,
~ ~ ~ °l° 4" OUTLET PIPE INVERT UP = = 157.00' LINE WEtR WITH TURF
~ ~ ~ \ ~ / = 156.70' REINFORCEMENT MAT.
A ^ ~ ~ 4 OUTLET PIPE INVERT DOWN = ~ ~ \ ~ , r ENKAMAI 7020 MAT
~ ~ . \ r . ANTI-SEEP COLLAR = = 2'X2' TOP OF DAM
~ ~ ~ \ r ~ r\ ` ~
\ ~
DITCH AND BURY
~ } \ / SHALLOW WATER (NORMAL POOL TO 6 BELOW) = 2,018 S.F. 50 HE NOTES: ROOT MAT EDGE 50 HERB. PLANTSl200 S,F, m 505 PLANTS 20'-?) (MIN, t2")
PLANT TYPE T1' KEY BOTANICAL NAME COMMON NAME ROOT CA ROOT CALIPER HEIGHT NOTES 1. EARTH BERM SHALL BE STABILIZED
;~0 AG9rUlS calamus ~ev~~t Flag CG?NT. GC?NT Pqt ~4" Q Q W/ SEEDING ACCORDING
WERBACE©US _ _ _ _ _ _ 50 Acores calamus'Variegata' Variegated Sweet Flag ~ CONT, 4' SPECIFICATIONS. CONT. 4" Pot 24" O.G. GITUDINA CTION VIEW
GRAPHIC SCALE ~ 50 Peltandra virginica Arrow arum CONT, 4' 2. SEE PLAN VIEW FOR MAT CONT. 4" Pot 24" O.C. PLACEMENT LIMITS.
30 o rs so eo ® 101 Pontedaria cordata Pickerelweed CONT, 4' CONT. 4" Pot 24" O.C. WEIR DETAIL
50 Sagittaria lancifolia Bulitongue Arrowhead CONT. 4 CONT. 4" Pot 24" O.C.
1 inch - 30 ft, 50 - Sa ittaria (atifafia _ Broadleaf Arrowhead CONT. 4' g CONT. 4" Pot 24" O.C.
77 Saururus cernuus Lizard's tai) CONT. 4' CONT. 4" Pot 24" O.C.
77 Schoenoplectus tabernaemontani Softstem Bulrush CONT. 4' CONT. 4" Pat 24" O.C.
/~4. REBAR 12"
SHALLOW LAND (NORMAL POOL TO 6" ABOVE) = 2,187 S.F. 50 HE 50 HERB. PLANTS / 20G S.F. = 547 PLANTS O.C. EACH WAY 1/2" PREFORMED JO1Ni ROOT CALIPER HEIGHT NOTE5 FlLIER, 12 WIDE
PLANT TYPE TY KEY BOTANICAL NAME _ COMMON NAME ROOT CA 55 Asclepias incarnata Swamp Milkweed CONT. 4' CONT. 4" Pot 24" O.C.
CONSTRUCTION SEQUENCE FOR WET DETENTION PONDS: HERBACEOUS CONT. 4" Pot 24" O.C.
TRASH RACK STEM GUIDE 55 Carex stricta Tussock Sedge CONT. 4' 1. ENSURE ALL APPLICABLE PERMITS ARE ACQUIRED PRIOR TO ANY CONSTRUCTION TOP OF FLANGE TO BE AT OR CONT. 4" Pot 24" O.C.
ABOVE WEIR ELEVATION STRAP TO RISER 55 Hibiscus moscheutos Rose Mallow CONT. 4' ACTNITIES. CONT. 4" Pot 24" O.C,
2. WHEN PERMANENT WET DETENTION PONDS ARE 70 BE USED AS SEDIMENT BASINS 55 Iris versico(or Northern Blue Flag Iris CONT, 4' DURING CONSTRUCTION, INSTALL BASIN TO PERMANENT POND DIMENSIONSAS $2 Iris virginica Southern Blue Flag Iris CONT. 4' CONT. 4" Pot 24" O.C.
SHOWN ON THE APPROVED EROSION CONTROL PLAN.
3, DURING CONSTRUCTION, PROTECT STORM SEWER INIETS WITH INLET PROTECTION 82 Juncus effuses Soft Rush CONT. 4' DEVICES, SEDIMENT DEVICES,ANDIOROTHERAPPROVEDMEASURES. MAINTAIN 10$ Lobeliacardinalis Cardinal Flower CONT. G' CONT. 4" Pot 24" O.C. CONT. 4" Pot 24" O.C.
DEVICES AS NEEDED, ~ w~ Woal ras CONT. 4'
4. AFTER COMPLETION OF ANY PHASE OF GRADING, ESTABLISH GROUNDCOVER ON 55 Scirpu5 cyperlnus g s CONT. 4" Pot 24" O.C.
GRADED SLOPES AND FELLS WITHIN 15 CALENDAR DAYS. 5. STABILIZE SITE AS AREAS ARE BROUGHT UP 70 FINISHED GRADE WITH VEGETATION 4" BEND
x OR PAVING. ELEVATION SECTION
6. CLEAN AND REMOVE SEDIMENT FROM POND AS NECESSARY DURING CONSTRUCTION. WET POND POOL=158.50 TRASH RACK
7. WHEN CONSTRUCTION IS COMPLETE, REMOVE TEMPORARY DIVERSIONS, SILT (INTERIOR 4" TEE INVERT) 6X4 TEE (~5 REBAR) 2000 PSf MIN.
FENCING, SEDIMENT BASINS, ETC. AND PROVIDE ADEQUATE COVER OR PAVE ANY 6" TEE RESULTING BARE AREAS. 3° NRS eEARINC cAPACIrr SEE BMP SECTION FOR SIZING DATA 9ENEATH COLLAR
8. COMPLETE CONVERSION TO PERMANENT WET DETENTION POND. CLEAN OUT ALL MJ PLUG W/ 2" ~ ~ ' ' ~ ~ ~ ~ ~ TYPICAL ANTI-SEEP COLLAR
SEDIMENT, AND ENSURE PERMANENT OUTLET STRUCTURE IS CONSTRUCTED PER GATE VALVE ° TAP/ORIFICE ° ~ Y 4 A THE APPROVED STORMWATER MANAGEMENT PLAN, PERMANENT EROSION ,
4 DIP PIPE ' W CONTROL DEVICES, SUCH A$ VELOCITY DISSIPATERS, SHOULD BE INSTALLED AT THIS BOTTOM DRAIN ° . W a' l 3" NRS NTS
, ~ V. TIME, , " , RTTRGH TEMPORARY n ~ ~ GRTE VALVE
_ ~ _ ~K MM~~ , a ° n r
~ _ PIPE OUTLE 4" DtP PIPE OUTLET-157. DD ~ a " , ~a VENT THROUGH DOOR
'
a ~ d MJ PLUG W/ 3" TAP d 0
6X4 ECCENTRIC ° s . , . / FLANGED BASE TEE PIPE OUTLET 0 i
N REDUCER . Q , .,Q ~ / ~ ~ 4 PJ
° CLAY LINER NOTES: ~ ' ~ / a '
tj SEASONAL HIGH WATER TABLE (SHWTj TO BE EVALUATED AT EACH BMP SITE 4 ~ , ' . , ' ~ a < ' ' ~ ° , ~ GROUT i A n;
P T P P \ ° ~ ~ r BY THE CONTRACTOR, IF THE PROPOSED PERMANENT OOL (WE OND OOL) /4 ~ BOLTS ° ' a ~ , °
IS NOT WITHIN t6 OF THE SHWT, THE CLAY LINER WILL BE REQUIRED. e , , 4. ~ / . a ~ / n NOTE:
2 THE CLAY LINER FOR THE WET DETENTION BASIN SHALL BE A LEAS 2 a. a , ) ~ o ~ a ' ° a . ° ~ , ~ ~ / ~ POND BOTTOM {SEDIMENT " ° ~ ° ~a SKIMMER MAY VARY
THICK AND MEET THE FOLLOWING 5PECIFICATIONS. I ' d ° e e ~ ; _ i a, v ~ \ ~ ~ CLEAN OUT}_153,00 , SLIGHTLY FROM FLOAT
UNIFIED SOIL CLASSIFICATION SYSTEM DESIGNATION OF CL, CH, ML,SC M ~ ' a a ~ ~ ~ ~ " MINIMUM OF 40~ PASSING ~?200 SIEVE ° " ILLUSTRATION
v MINIMUM PLASTICITY INDEX OF 12 ~ ~ 4 . ' e' ~ ° ANTI-FLOTATION ~
° MAXIMUM PERMEABILITY OF 2.5X10 CM/SEC (0.035 IN/HR) ° , , ° ~ < . , a . BLOCK `s `D OUTLET END; CONNECTION
m A MINIMUM OF 2 TESTS OF EACH A80VE PARAMETER SHALL BE COMPLETED a ; ° " ° e..° a ° BY THE CONTRACTOR ON THE LINER MATERIAL AND PRESENTED TO BOTTOM INVERT=153.00 d TO BOTTOM DRAIN OUTLET PIPE
TH I R F R APPRO A. E ENG NEE O V t COMPACTION TO A MINIMUM OF 93~ PER ASTM 0698, AND WITHIN 3~ OF _ BARREL PIPE LONGER THAN SHOWN NOT INCLUDED WITH SKIMMER
B THE OPTIMUM MOISTURE CONTENT 1 COMPACTION DENSITY TEST PER 3' D" SUPPLIED BY USER
3 2500 SQ. FT.) ~"t~ CAR
o THE CLAY LINER .SHALL BE PLACED UNDER THE BOTTOM OF THE WET DETENTION BASIN AND UNDER THE SIDE SLOPES TO A THICKNESS OF 12 INCHES. A 0 o po®o oeoo f o o ~
MINIMUM OF 8 INCHES OF TOPSOIL SHALL BE THE FIN15HED GRADE AS SHOWN FLEXIBLE JOINT (NOT TO EXCEED 3' IN LENGTH) = AL e
ON THE DRAWINGS AND/OR DETAILS. CARE SHALL BE TAKEN WHEN TRACKING IN
THE TOPSOIL TO NOT PUNCTURE OR DAMAGE THE CLAY, ACLAY/SOIL MIXTURE o MAY 8E USED IF THE ABOVE SPECIFICATIONS ARE SATISFIED AND WITH WRITTEN TEMPORARY SEDIMENT DEVICE - e 13039
APPROVAL BY THE ENGINEER. DRAW DAWN SECTION A-A DEVICE PLAN VIEW J VIEW DEWATERING SKIMMER DETAIL ~~,F~;c~NE~~~~~
id~I S a
v USE 3" SKIMMER W/ 2.5" HEAD (TYP.) N`IS ~'°~,~,~~tENN~,,~'~~~,
0 3
m I
o o. Revision Date B Designer Scale 'r-INC)LOGY AND Nt5"'IGHTWATE"" r"'If-"ITEC
W&R SEE ABOVE K t5 STORMWATEI VATER MANAGEMENT PLAN WITHERS RAVENEL Sheet Na,
Drawn BY Date a
g LAW 07 09 10
o Checked By Job No. MEDICAL CENTER PHASE 1 INFRASTRUCTURE LGS 2090050.0 HARNETT COUNTY NORTH CAROLIN A.,; i BMP #4 ENGINEERS 1 PLANNERS I SURVEYORS 111 MacKenan Drive Cary, North Carolina 27511 tel; 919469-3340 fax, 919.4676006 www,withersraven!j: o
0 x