Fill - Free fillable Grass Channels 2014

Submitreport

to:



CityofLynchburg



525TaylorStreet

Lynchburg,Virginia24501



Attn:StormwaterBMP

434‐455‐4250



GRASSCHANNELS:O&MCHECKLIST–VirginiaStormwaterManagementHandbook,

Chapter9‐C.4.0.



InspectionDate

Project SitePlan/PermitNumber

Location DateBMPPlacedinService

DateofLastInspection Inspector

Owner/Owner’sRepresentative

As‐BuiltPlansavailable: Y/N

Typeofpretreatmentfacility:

 SedimentForebay

 CheckDam

 GrassFilterStrip

 StoneDiaphragm

 Other:__________________________

 None

Ideally,theseBMPareasshould be inspected annually,with the inspection conductedspring whenthehealthofthegrasschannel

liningshouldbeevident.Onceestablished,GrassChannelshaveminimalmaintenanceneedsoutsideoftheSpringcleanup:regular

mowing, repair of check dams and other measures to maintain th

e hydraulic efficiency of the channel and a dense, healthy grass

cover.

Elementof

BMP

PotentialProblem Y/N HowtoFixProblem

WhoWill

Address

Problem

Comments

Contributing

DrainageArea

Thereisexcessivetrash

anddebris

Removeimmediately

Owneror

professional

Thereisevidenceof

erosionand/orbareor

exposedsoil

Stabilizeimmediately

Owneror

professional

Pre‐treat

ment

Thereisadequate

accesstothepre‐

treatmentfacility

Establishadequateaccess Professional

Thereisexcessivetrash

/debris/sedimentin

thefacility

Removeimmediately

Owneror

professional

Elementof

BMP

PotentialProblem Y/N HowtoFixProblem



WhoWill

Address

Problem



Comments



Pre‐treatment

(continued)

Thereisevidenceof

erosionand/or

exposedsoil

 Stabilizeimmediately

Owneror

professional



Thereisevidenceof

diaphragmorother

clogging



Identifyandeliminatethe

sourceoftheproblem;.If

necessary,removeandclean

orreplacethestone.

Professional 

Thereisdead

vegetationand

evidenceoferosionand

/orexposedsoil



Repairerosiondamage,and

reseedorotherwise

restabilizewithvegetation

Owneror

professional



Inlets

Theinletisnot

maintainingacalmflow

ofwaterenteringthe

channelorthe

conveyancecapacityis

blocked



Removetrashandsediment

accumulatedattheinflow.

Sourcesofsedimentand

debrismustbeidentifiedand

corrected.Stonesplashpads

mustbereplenishedto

preventerosion.



Owneror

professional



Thereisevidenceof

erosionat/aroundinlet



Repairerosiondamage,and

reseedorotherwise

restabilizewithvegetation.

Owneror

professional



Vegetation

Nativesoilisexposedor

erosionchannelsare

forming



Ifsedimentdepositsarethick

enoughtodamageorkill

vegetation,removethe

sedimentbyhand,while

protectingthevegetation.

Owneror

Professional



Grassheightdoesnot

reachstandards



Grasschannelsmustbe

mowedtokeepgrassata

heightof4”to9”.Remove

grassclippingsaftermowing.

Owneror

Professional



Vegetationrequires

fertilizerorpestcontrol



Fertilizeaccordingto

specifications.Useorganic

ratherthanchemical

fertilizer.Iffeasible,use

compost.Useintegratedpest

management(IPM)

techniquestominimizethe

useofpesticidesand

herbicides.

Owneror

Professional



Theplantcomposition

isconsistentwiththe

approvedplans



Makeajudgmentregarding

whetherplantsneedtobe

replaced,andreplaceif

necessary

Professional 

Invasivespeciesor

weedsarepresent



Correctlydestroyand/or

removetheinvasivespecies;

makeajudgmentregarding

whetherotherweedsneedto

beremoved,andremoveif

necessary

Owneror

professional



Thereisdead

vegetationand/or

exposedsoil



Reseedorreplacedead

vegetationandexposedsoil

areas

Owneror

professional



SideSlopes

Evidenceoferosionon

sideslopes,introducing

sedimentintothe

swale.



Repairerosiondamage

immediately.Stabilizeslopes

usingappropriateerosion

controlmeasuresandplant

Owneror

Professional



Elementof

BMP

PotentialProblem Y/N HowtoFixProblem



WhoWill

Address

Problem



Comments

appropriatevegetation.

CheckDams

Damisnotfunctioning

properly.



Checkupstreamand

downstreamsidesofcheck

damsforevidenceof

undercutting,sidecuttingor

erosionandrepair

immediately.

Professional 

Thereisalarge

accumulationof

sedimentor

trash/debrisbehindthe

checkdam.



Removesedimentwhenthe

accumulationexceeds25%of

theoriginalTv.Remove

trash/debrisandclear

blockagesofweepholes.

Professional 



Channel

Bottom

Undesirableplant

species,accumulations

offallenleaves,and

otherdebrisfrom

deciduousplantfoliage

arepresent.



Removewoodyvegetation

fromthechannel.Prune

adjacenttreesandshrubsto

keepthechannelclear.

Remove/replaceinvasiveveg.

orweedsiftheycover<25%

ofthechannelarea.Remove

accumulatedorganicmatter

anddebrisimmediately.

Owneror

Professional



Basesoilsare

compacted.The

practicedoesnotdraw

downwithin48hours

afterastorm.



De‐thatchandaeratethe

channel.Removesediment

whentheaccumulation

exceeds25%ofchannel

volume.Restoretheoriginal

crosssectionandrevegetate

thechannel.

Owneror

Professional



Thereisunhealthyor

deadgrasscoveror

evidenceoferosion,

braiding,orexcessive

pondinginthechannel

bottom



Fillinlowspots,repair

erosion,andadd

reinforcementplantingto

maintain90%turfcover.

Reseedanysaltkilled

vegetationandstabilize

immediately.Keepthegrass

inahealthy,vigorous

condition

atalltimes,sinceit

istheprimaryerosion

protectionforthechannel.

Owneror

Professional



ChannelOutlet

Theoutletdoesnot

maintainsheetflowof

waterexitingthe

channel(unlessa

collectiondrainisused).



Thesourceoferosion

damagemustbeidentified

andcontrolledwhennative

soilisexposedorerosion

channelsareforming.Check

thechanneloutletandall

roadcrossingsforbank



Owneror

professional



Elementof

BMP

PotentialProblem Y/N HowtoFixProblem



WhoWill

Address

Problem



Comments

stabilityandevidenceof

pipingorscourholes.

Theoutletprovides

stableconveyanceout

ofthechannel



Stabilizeimmediately,as

needed.

Professional 

Thereisexcessivetrash,

debrisorsediment

accumulationatoutlet



Checkinflowpointsfor

coggingandremoveany

trashandsedimentdeposits

Owneror

professional



Thereisdead

vegetationand/or

exposedsoil



Reseedorreplacedead

vegetationandexposedsoil

areas

Owneror

professional



PestControl

Thereisevidenceof

standingwaterand

mosquitohabitator

rodentdamage



Pestcontrolmeasuresmust

betakenwhenmosquitoes

and/orrodentsarefoundto

bepresent.Ifspraysare

considered,thenamosquito

larvicide,suchasBacillus

thurendensisorAltoside

formulationscanbeapplied

onlyif

absolutelynecessary.

Holesinthegroundlocated

inandaroundtheswalemust

befilledandstabilizedwith

vegetation.

Professional 



Overall



AccesstotheGrass

Channelisadequate

 Establishadequateaccess Professional 

Complaintsfromlocal

residents

 Correctrealproblems

Owneror

professional



Encroachmentby

buildingsorother

structures



ClearlymarkBMPandinform

thoseinvolvedoftheBMPs.

Owneror

professional



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Grass Channels 2014 - Grass Channels

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