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~ ' ' ~ ~ SEDIMENT' FOREBAY oQ~ tBaaDs2~•s~s
1\ ` \ ~ 1 ~
~ s, o`~ POND SEDIMENT CLEANDUT BENCHMARK ~
\ E ~ ~ r .,..-~'"'"10P OF POLE ~ 988.D0 WpR CORE TO 5E w o,~
`ti ~ ~t F~ 95% COMPACTED CLAY N OBTANd MATERIAL ON SITE
~ ~ AS DESIGNATED BY ENGINEER ~
\ , ~1' ~ BorroM EIEV= ssa.DO CONSULTANTS
\ 1 ~ , G A9PLETED
~ AFTER GONSTRUCTlON !S D L1N£R - T2" Mrrl tHicKNESS TAYLOR Sc VIOLA
BASIN TO BE G4EANED OUT TO EL A 1 T00N COMPACTED CLAY m
` H WN ON THfS PLAN PRIOR TO BEING USED SO j ~ AS A DETENTION BASIN. oBTArN MATERIAL DN slTr: ~'~c STRUCTURAL ENGINEERS AS DESIGNATED BY ENGINEER ~ pr~~. HICKORY, N . G.
~ ~ ~

~ , SECTION' - AT FORE AY ~TTDM BRITTAIN ENGINEERING
~ ~~e NOT TO SCALE ELEV= 9s2°oo PLUMB'GMECHANICAL 8c

. smoMENT ccEANaur BENCHMARK ELECTRICAL ENGINEER S TOP OF POLE = ss5.ot CHARLOTTE, N.C.

~ 4 ~ ,
\ ~
\ 1. ROUTINE MAINTENANCE IS VITAL TO THE OPERATON OF THE WET DETENTION BASIN. NO TWD WR GH T ASSOCIATE S
PONDS ARE THE SAME, BUT EVERY POND W2L REQUIRE MAINTENANCE A7 SOME POINT, ANO THEIR MAINTENANCE NEEDS WILL VARY WITH THE SIZE, TYPE OF WATERSHED, LDCATTDA; ETC. CIVIL ENGINEER S
i 2. ADEQUATE FUNDING 1S ONE OF THE MOST IMPORTANT FACTORS IN A SI+CCESSFUL OPERATION NEWTON, N.G. AND MAINTENANCE PROGRAM,
~ ~ . 3 DESIGNATION OF A RESPONSIBLE PARTY 1S IMPORTANT TO ASSURE 1NSPEC7rON AND MAINTENANCE. ESTIMATED ANNUAL OPERATION ANO MAINTENANCE (OEM) COSTS FOR WIT DETENTION 8AS1NS DF
~ ~ ~ S% OF CONSTRUCTON COSTS WERE FOUND IN A SURVEY CONDUCTED Est' THE STATE OF MARYLAND
1 ' ! ~ ON THEIR WET DETENTION BASINS. IN ADARTON THE NURP STUDY 1N WASHINGTON D.G, ESTIMATED OdcM C05T5 t0 BE 5A OF CONSTRUCTION COSTS
5. A STUDY OF MARYLAND BASINS FOUND THAT, IN GENETiAL, PEOPLE HAD' MORE FAVORABLE IMPRESSIONS OF WET AETENIION BASINS, WERE LESS LIKELY TO THROW LRTER tN 7FHM, AND WERE MORE UKElY
~ ~ TO CLEAN AND PERFORM ROUTINE MAhVTEMANCE ON THESE BASINS WHEN THEY WERE PROVIDED A PROMINENT POSTIIOld PI THE DEVELOPMENT.
& A PERMANENT EASEMENT MUST BE PROVIDED 7O ASSURE EASY ACCESS FOR MAINTENANCE. CARE
l _ 5HOULD Bf TAKEN TD SECURE ALL APPROPRG4TE LEGAL AGREEMENTS FOR THE EASEMENT. 7. A BENCHMARK FOR SEDIMENT REMOVAL SHOULD Bf E5TABLIS1iE0 TO ASSURE ADEQUATE STORAGE
FOR WATER OUALITI' AND FLOOD CONTROL FUNCTIONS 8. THE MAINTENANCE NEEDS OF ANY PARTICULAR WET POND ARf HIGHLY DEPENDENT ON THE COIVDIflON
OF THE WATERSHED 1TiAT CONTRIBUTES RUNOFF TO THE POND. MAINTENANCE SHOULD ALWAYS INCLUDE MMIIMIZING EROSION PROBLEMS AND POLLUTANT EXPORT TD THE POND FROM THE CONTRIBUTING WATERSHED.
~ ~ 9. AGAIN, ONE MUST REMEMBER THAT WHILE GENERAL MAINTENANCE TASKS ARE lOETTiIFlED HERE, ACTUAL
~ ~ NEED WILL VARY FROM SITE TO SITE. 1N GENI:RAG PLANS MUST INOICAI'E WHAT OPERATION AND MAINTENANCE ACTIONS ARE NEEDED, WHAT CRITERIA WILL 8E USED TO DETERMINE WMET~ THESE AC7fONS ARE NECESSARY, ANO ~ ,1y ;
ti j , ~ WHO IS RESPONSIBLE FOR THESE ACflONS. EXAhlPLE5 OF ITEMS THAT SHOULD BE INCLUDED ON AN OPERATION AND MNNTENANCf PiAN INCLUDE; LTUT ARE NOT LIMITED TO THE FOLLOWING. '
A. DEBRl5 AND LITTER CON11?OL CHECKS FOR INLET; OUTLET' AND Ot11FICE OBSTRUCTION AFTER EVERT STORM PRODUCING RUNOFF. ~ E
~ ~ ~ ~ \ 8. PROVISIONS FOR ROUTINE VEGETATON MANAGEMENT/ MOWING AND A SCHEDULE FOR
~ ~ THESE ACTNtTLES. ~ I:; C. CHECKS EVERY s MONTHS, OR MORE FREQUENTLY, FOR• tj i
~ ~ ~ , I P) SEDIMENT BUILDUP AND 1HE NEED FOR REMOVAL, \ 2) EROSION ALONG THE BANK AND THE NEED FOR RESEEDING OR STABkLZAflON AND
a ~ ! ~ 1 ~ Vie. I iF RESEEDING !S NECESSARY, A RESEEDNG SCHEDU!£ fJ ? 3) EROSION AT THE INLET ANO OUTLET AND METHODS OF STABILLZATION
l ~ t
~ ~~~Mr, ~ ~ l ~ ~ ~ ~i r 4) SEEPAGE THROUGH THE DAM 5) OPERATION OF ANY VALVES OR MECHANICAL COMPONENTS i ! D. AGREEMNNT SIGNED AND NOTARIZED BY THE RESPONS/8lE PARTY TU PERFORM THE rj~ ~;i
~n~;~ i ~ F i TASKS SPEC/fTEO IN THE PLAN, 1NCLUDLNG INSPECTIONS, OPERATION, AND ANY NEEDED MAINTENANCE ACTIVITIES. ~r!
~ 1 i f~~~ _
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r~t1ti h inii~ ~ t0 ~ 6 1 {,,a
N~ 9~ ~ ~ ~~tqU~ ~ ~ ~ ~ ~ ~ "Ai~~ ~ ~ ~ l ~ t ISECTIS ~1
,~~U!ry ~ ~ `Qt ~~r~ 2,~!ly ~ i
rdr ~ ~ ~ N ~r~ r b LL$c~STL~ '1 r~i~wl i'ii i 9. NORTH CAROLINAS STORM WATER RULES REQUIRE ANNUAL 1NSPE±;flONS $Y THE REGULATING ~'s AGENCY OF THE WET DETENTION PONDS AS A MINIMUM. MORE FREQUENT'1NSPECflONS BY kj
rr C r1U"~c` ~ItIN ~~Ait[i~ - ~ , 1HE LAND OWNfR, OR POND OPETiATOR ARf STRONGLY ENCOURAGED TO'',ENSURE THE PROPER { ; OPERATION OF A WET DETENTION FOND. LOCAL GOVERNMENTS CAN REQUIRE MORE FREQUENT `
it \ F ~ y 1 INSPECflONS, AND ALL LOCAL CODES SHOULD tTE CONSULTED. ~~1 2, THE D1VlSIDN OF ENVIRONMENTAL MANAGEMENT AND SEVERAL LOCAL GOVERNMENTS NAVE :
A Ur : \ - j . ~1~, t~~~~' J~ ~ ! - r l/i ~y ~iYi q i ~ - DEVELOPID INSPECTION SHEETS THAT SERVE A5 CH£CKL15T5 FOR INSPECTORS. AT A MINIMUA! I'' AN 1NSPECflON SHOULD INCLUDE REVIEW OF THE FOLLOWING. ~:I
~ ~ I mo,~t~t' .hj{1~ 9'..\~ ~ ~ ~ A. OBSTRUCTIONS OF THE fNLET AND OUTLET DEVICES BY TRASH AN0 DEBRIS
1 1 d B, EXCESSNE EROSION OR SEDIMEMAADN IN OR AROUND THE BASNI ' C, CRACKING OR SETTLING OF THE DAM
r D, OETERIORAIIQN OF INLET OR OUTLET PIPES f~~r{ E; CONDIflON OF 7NE EMERGENCY SPILLWAY `l
~ _ arx~vmaar t ~ 1 F. STABlLIT/ Of SIDE SLOPES G. UP AND DOWNSTREAM CHANNEL CONDITIONS y
IL WOODY VEGETATION IN OR ON THE DAM
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t TRASH H000~ ANTI-VORTEX t;~
Na a~ Bm m® ~ aRio aw / ' / , RACK TOP OF DAM 10° LITTORAL 97A.00
SHELF PROP, GRADE I;i1
/f / TOP OF RISER ~ €I ~
~ ~ 1 (1) 1.5" ORIFICE HOLE AT 968.50 ~ FOR DETENTION 10:1
INV AT 967.50 SLOPE
/ i' PERMANENT STATIC
POOL ELEV= 967.50 m ® ~1 m NINA m ® FROM ~ACGEPTABLE DESCRIP~ON
/ / i (t) 1.5°' INLET PIPE SPECIES LISTING fOR SCHEMATIC PHASE EXTENDED 1' BELOW POND 1 STATE OF NORTH CAROLINA
r i ~ PERMANENT POOL SURFACE ALONG THE OUTER PERIMETER DEIGN bEVELOPMENT
r'~ z PROP. LITTORAL SHELF AND 'NOT PROP. STEPS ®NO MORE TT~AN 36" RC ~u~ IN THE WEIR SEGTiON.
i5" O:L;. RISER p (SEE PLANTING DETJ~L BELOW)
1 SLUICE SUPPORTS ~y PER MANUF. arv WEIR CORE 70 BE
I NaTE:
' USE THE FOLLOWING AQUATIC PLAN' { IN THE OUTER PERIMETER QF THE P AQUATIC PLANTING ~ 954 COMPACTED CLAY IETER QF THE POND'S " 6x8 CONC. OBTAIN MATERIAL ON SITE
1 1 LITTORAL SHELF IN AN ALTERNATING .N ALTERNATING PATTERN BOX AS DESIGNATED BY ENGINEER
i AS SHOWN IN THIS DETAIL. (ALTER F J FROM THE '~S TI N ANO P.~ANTIN( )ETAIL. (ALTER PLANK TOP OF ~N ANO P N~.A 17NG C 11 ~ BOX= 965.00 ~ T,-~ ~ .1_ ~~~r
/ i F4R QOt~ATiC AND WET AND PLANTS ETl AND PLANTS IN THE 12"~ SLUICE
PIEDMONT REGION OF NORTH CAROLI OR H C ROLINA~N~I RISER GATE
ELEV. 963.00 PROP 266' - 30" HOPE TLET AT 1.00 W.H.
PICKERELWEED - 1 GAL. SIZE , GAT. SIZE R.LS. BOTTOM 6 m CBSR ARCHITECTS, IPdC. 2005
LIZARD'S TAIL - 1 GAL. SIZE SAL. SIZE ELEV= 962.00
SOFT STEM BULRUSH - 1 GAL. SIZE ~ - 1 GAL. SIZE LINER - 12" MIN. THICKNESS 7' x 9° x 6" THK. 900% COMPACTED CLAY CONC. FOOTING
ARROWHEAD - 1 GAL SIZE L SIZE ~ OBTAIN MATERIAL ON SITE WITH 10xtOx8/8 WWM. t' ~ c~.
~`6NatrieB AS DESIGNATED BY ENGINEER i ` w
WRt~~T QSJr'dC~~lES _aa.°`J~ CA~~I°,°<, ) s _ GRAPHIC SCALE MARSH SEEDBOX - 1 GAL. SIZE 1 GAL. SIZE TWO CONC_ANTI-SEEP COLLARS
/f81} IN THk UYYtPt Z/s Ur uHm "v -"-PONA?
ENGINEERS & SURVEYORS b° S s~o 20 0 10 20 40 I I J
E iGHwAY 16 sours PLANT DETAIL OF LI 4160 H a s LIL OF LITTORAL SHELF SECTION --A AT A NOTE: ALL JOINTS MUST BE SEALED NOT TO SCALE
~ NEWTON, NC 2W8658 TYPICAL oa e NOT TO SCALE IN 1 ° 8128108 . WATER TIGHT. coo OP
~ °OOPoa ooeo°° G' e{ ~T r IN [phone] OFFICE t inch - z0 ~t,
828 465-5878 FAX