HomeMy WebLinkAbout20071856 Ver 1_Stormwater Info_20071205f,...~
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Wet lC~etenton ~3asi.n Tnspecti.®n an~i M~ixxtenance Agreemeli~~ran~~~;AL~~,
., ~q gRr~;i{;r;
I will keep a maintenance record on this T3lVl~F'. This rrZaii:ttenance i•ecaxd will btu kept in a
lag iz~ a known set location. i~ny t~eficien:t $M:1?t~lexxtents noted in the irtspectiart will be
corrected, repaired. ar. repla.ced i.mrnediately. These dNficienc:ies cart. affect the integrity
of strtxrtures, safety of klte public, and the rernaval efficiency af. the l3MP.
T'he wet detenfi.,oxt basin system is defined as the wet detention basin.,
pretreatrxteizt including foreliays ~tnd the vegetated f'iltex if cme is provided.
't'his system (check vne~.
does ~ does n.at iaicarparate a vegetated filter at the outlet.
This system (deck aMC~:
does ^ does not incorporate pxetreatment other than a fcrrelvay.
Important inaintenanr_e pxocedures:
- Izximediakely after th:c wet cletentian basin is established, the plants on the
vegetated shelf and perimeter of tl~e basin should be watexcd t~~vire weekly if
needed, until the plants beca~ne e5tablish.ecl: (cozrtmanly six weeks).
- I~lo pc~riion of thc~ wet detentions pared shcrrxltl be fertilized after the first initial
ff~rtilizatian fttat is required to establish the plant`s an the vegetated s.lielf.
- Stable graundcaver sl~attld be maintained .in thc~ draixzage area to reduce thL
sediment laid to th~~ wet detention: basin.
- If the basin must be dxained for an emergency car to pE~rfoxn~. rnairtt:enance, thca
flushing of sediment through they emergency drain should be nz.iniinized to th.e
ntaximuztx extent practical.
- Once a year, a darn safety expert should inspect the czxlbankaztent.
After tl~e wet detention pond is established, it should be in.spectc~d once a month a.nd
within 24 ho~us after. every sform event greater than I.tl inches {or ~..5 inches if iat a
C~aastal Cautnty), R.ecards of inspection and. maintenance should be kept in a knawx~ set
location. and must be availalil.e upon request.
Inspecticart activities slZall lase performed as follows. Arty problems that axe found shall
be repaired imrneciiately.
iF?MP element: -~ Potential. roblem: .- _ _I~aGV 1 ~vzl.l re~nrediate the~rroblem_-
The entixe BMP Trashdebris iv5.pxesent. Retnave the trash ebris.
"I"he perimeter of the wet Axeas of Mare sail and j or Regrade the sai..l if necessary to
detention basin erosive gullies h.aec formed. rt'.tnave the gully, ajul then ~laitt a
grouxxi cover cznci. watex uzltil it is
esfablisheti. l'rovi.de lime anal. a
_ ___ _ _ one-time €r.rkiliur a~ticatio_n.
`VeKetation is tacs shoat csr too Maintain vegekatic~rt at a. height of
___.. T lort~^_~ ~sraxisna~ six irsches_
~.~
elenaertt: ! I'atentiai
The inlet device: pipe or ~ Z'he pipe is cloggE.>d
swale
The forebay
The vegetated shelf
Tice main treatment axt~a
Tl~e pipe is crad<E~d ar
otherwise dain~ed__-•,__ --
Erosion is occurring iat th.e
Swale.
Sediment has acxurriutakeri to
a depth greater than the
origi.:na.l design depth fur
Sed.irrtP.nt StUrage.
Ernsian has occurred.
lhreeds are prc:sE:nt
Bask professional practices
show that pruning is Ilec~dE:d
fin rizainta~in optila~al plant
health. _ ____
I'l.alri~; are. dead, ci.iseased or
dying-
V1~'eecis are 1?resent.
Sediment 1•ras accunticliated to
a depth gxE?afar th.~an the
original. design sediment
storage depth.
t'~lgal growti~ rovers over
5Cl% of the area.
Cattr~als, plu•a~;niites ox other
invasive plants rover 54°~s of
the l,asin surface.
Huw I will remed.i.ate theprabl
Linclog the: pipe- Dispose of the
sedirttrnt off-site. _ _...__
Replace tl~c~ pipe.
I<egrade the swale~ if necessary to
srr~aath it over allc~i prav.rcle erosion
contrral devices such a.s reinforced
turf snorting car ripral~ to ~•IVaid
future problems with eros.i.un.
-- -----i------.__......___._ ... _ .. _ __..___..._ ..
Search for the source of the
seclinlent anci remedy the pI•ableln if
passible. IZerxlove the sedilneitt and
dispose of it in a location where it
will not cause impacts fi<s strea.nts ur
tite I31~11'.
1?ravide additional erosion
protection. such as reinforced turf
matting or riprap if needed to
prevent Future erasion prc~l~leins.
PemovE the weeds, prefera4aly vy
h<.rnd. It pestic,iEle is Used, rv%pe it an
th~artts r<~tlze:r than spat;~in~;. _~ _
1'run~*. accord.ilzg to test professional
p:rartices
Determilre the soia.rce of t1rE?
problem: soils, h}~drolagv, disease,
etc. Panted}' t11e problerrt and
replaco plants. Provide a une-tilite
fertilizer application to estaUlish tl,e
ground caves if a sail tt~st indicates
it is necessar~~. __ .. __
Remove the t•~reocis, preferabi}~ by
harm. If pesticide is used, wipe iron
tk,e Ia.nts rathtzr than s ra in
Search far the source of the
sediment altd remedy the pral.~lern. if
p~:>ssilTle. Fentavc the sediment and
riispose of it i.n a location where it
will. not rarasc impacts to strearli~5 ur
fire BMl:'. _
Consult a professional to remove
atari cantro_i the.al~~al growth.
R.elrtove the plants 1»~ wiping thetas
with pesticide (do flat sprayj.
r
B1V1E' element: _
~~-__+- Patentia~srablerrr: _~..____~ ~ i~avr I will rem.ecfiate the pz•oblezrt~
The exz~bankrz~err.t Slir•ubs have st~~rted to grow lteni.ove shrubs i.mrneciiatel~~.
on the em,t,an.kzxlent. __
~^.V~~ f
___ _ __ _ A
-
Evidence aE zztuskrat or Use trays to reznove• muskrats a.nd
beaver activity is present. cozxsul.t a prufessioz~,~.i to remove
_ 3seavers.
A tree lzas starteci fio l;row ozt _ ~~__ _
Consult a dam safety speci~liist to
the en•lbankzYZ,eltt. _
__
_ reulove the txee.
.
An annual inspectic)n byT an lvla:ke all rreedecl repairs.
appra~riate profcssil)nal
sltnws that the embankment
deeds rE'' 7ail'. __
.~ _
~
The ocYtlet devICC C111~41I:tl~T ll.a!.i OL'Cttrretl. Clean all.t t11N. QtEtLet C~eV1Ce. 172spaSe
of tine sediment off-site.
_
1'he outlet device .is daz}1a 1Gd __ _
lZl' air ar r~lace the autlet device_
The receiving water F~rosion or other signs of. C.:ontart t11e local NC l~ivlsra.n of
damage have occlx.rreci at the L'Vater Quality 1Zegialu~l Office, or i
outlet. the 401 C)versight Unit at 9:1.9-733- !
_...._ .1~786~__._- __....---~__ __-W
The n-teasuring device used to c~etern~ine t11e sediment elevation shall be such
that it will give an a.cc:urate depth readixlg and not xeadily penetrate into
aceumulatec~. sedilrlc~nts.
When. the pern~tanen:fi pool depth reacts _42$ feet in the iriain pond., the: se~c~iment
shall I-se removed.
When the permar~.ent pool depth reds 424 . feet ixx the .forebay, tl-te seclirnent
shall be removed.
S.~SIN DIA.txitAMf
(fill irl the hlrrnksj
Permanent i"ao! Elevat.iorz 428
Sedizncnt Removal h .424
Bottam Elevatio :423
Sediment
Sta.rabe
rORE)~A~Y
Poal
,^ - - ~ ~ ~Sed:imentYRernovai F levatian 424 ^ - y , ~ _ . _ _ _ _ _ Vol'ulzz~
13otiam Ei.cvation
iVrA11W 1'OMI
1-R
Storage
~,
I acknowledge and agz~ee by zi3y sigzlature below that ] am responsible for the
pexforntance of the nl,ainfitz~tance procedures listed above. I agree to notify I7~1JC,~ of az~ty
problems whiz the system. or prier to any changes to the system or responsible partq.
Print name:,__~ 44 ~- ~. o`f Q ___ ______.__. _~..
Title: Q t~~E~t. ~ ~ ~
Address:_ ~~ ;.. ~" ~v~pT~'tS .~ t ~4% ~r,~%(~5ut ~ C 2. ~''~'-h
Note: The legally responsible party should not be a homeotivcters association unless more than SO% of
the lots have been sold and a resident of the subdivision has beezt named. the px•esident.
~, -tL•~.v,~.-~~,.=~..,,;~',~:,,it,,,~`~:,.c.~, _, a Notaz-y Pubiie for tl~e State of
~~~,~ ___ _, County of _I ~;_, ?~ , do hereby certify that
~~ ~ i ~ i ~ ,n,, ~ .~;`~A Ar~~-~. ~, personally appeared before me this t _
day of ~~ ~'tti1 ~,,t~, o~...~'~ _, r-~!r~^~!% ,and acknowledge the due executiozl a#'the
forgoing wet defiention basin maintenance requirements. ~Iitness my hand and ofk'zcial
seal,
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Niy eommissiozl expires ~~ ~' ~~ ~ ~~ ~:~Ca ~ ~ ______
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