AcTion plAn - Lewiston, Maine

hartbrookwatershedmanagementplan|woodard&Curran a-�

DRAFT

Hart Brook WatershedAcTion plAn

BAckgRounDtheCityoflewistonismaine’ssecondlargestcityandislocated30minutesnorthofportlandandtwentyminutessouthofaugusta.thecityisanurbanmixofresi-dential,retail,commercial,office,andagriculturallandusesandcurrentlyhasoneofthemostrobusteconomicgrowthratesinthestate.theandroscogginriverflowsthroughlewistononitswaytothemerrymeetingbay,thekennebecriverconfluence,andtheatlanticocean.theandroscogginisanincreasinglyimportantcomponentofdowntownlewistonrevitalization.

hartbrookisasmallstreaminanimportantdevelopingareainthesuburbangrowthareajusteastoftheCity’sdowntownarea.thewatershedcontainssomeofthefirstsuburbanindustrialdevelopmentintheregionandishometoimportantbusinessessuchaselmettechnologies,thegeigerbrothers,allen-edmondsandwhiterockdistilleriesamongothersandisexhibitingincreaseddevelopmentaroundthemaineturnpikeexit80interchange.activeretailandcommercialactivityislocatedalongroute�96-lisbonstreetwhichbisectsthehartbrookwatershed.hartbrookdrainstotheandroscogginriver.

the2�00acrehartbrookwatershedhasover22%impervi-oussurfaces(rooftops,parkingareas,drivewaysandroad-ways)andhasbeenidentifiedbythemainedepasimpairedduetostormwaterrunoff.Impairedwaterbodiesareunderincreasedscrutinybystateandfederalregulatorsandcur-rentstateregulationsrequirenewdevelopmentwithinanimpairedwatershedtoimplementadditionalstormwatermanagementrequirements.ultimately,allpublicandprivateinfrastructurewithinthesewatershedsmayberegu-latedunderfederalCleanwateractpermitrequirements.

Inordertoproactivelyaddresspollutedstormwater,in2007,theCityoflewistonvoluntarilybeganawatershedassessmenttoidentifylikelysourcesofstreamimpair-mentandviableopportunitiesforimprovement.thewatershedwasdividedintosixsubwatershedscomprisedofsimilarlanduse.eachsubwatershedwasevaluatedtodeterminepotentialstormwaterpollutantloadsandtoidentifyspecificstructuralandnon-structuralmanagementstrategies.thesesubwatershedsprovideamorerefinedmanagementframeworkfortheimplementationoftheplan.thestudysubwater-shedsareshowninFigure�.

Figure 1. Hart Brook Watershed,

Subwatersheds and locations

of Maine DEP sampling points.

woo woodard&Curran|hartbrookwatershedmanagementplana-2 DRAFT

Hart Brook Watershed ManagementBASIS FOR ACTION

1. The watershed was assessed for causes of water quality degradation.

1a. The watershed was divided into 6 subwa-tersheds and analyzed for stormwater pollutantloads and specific land use contributions to stormwater pollution.

1b. Subwatersheds prioritized based on pollutant load and current/proposedland use.

1c. 1. Industry 2. Valley Section 3. Interchange 4. Old Lisbon 5. Lower 6. Goff Brook

2. Stormwaterbest managementpractice (BMPs) opportunities were selected andconsidered for use in response to specific situations found in the six subwatersheds.

3. BMPs identified and classified as both structuraland non-structural and categorized by the type of project and the probable cost.

4. The Hart Brook Watershed Management Plan stakeholder group prioritized the project types in the order in which they felt the most impact could be made.

Prioritization of structural project types:

1. Sanitary Sewer Assessment

2. Town Roadway Retrofits3. State Roadway Retrofits4a. Private Facility Retrofits4b. Stream Enhancement

Buffers5. Regional Facilities

Prioritization of non-structural project types:

1. YardscapingOutreach Programs

2a. Regulatory and Administrative

2b. Monitoring Program2c. Stormwater Credit

Trading Program3a. Stormwater

Internship Program3b. Shade Tree

Planting4. LA Think Blue

Business

6a. Specific non-structuralaction items were developed.

6b. The Top 65 structural and specific non-structural BMPs were combined and a final list of action items developed.

6c. Final actionplan prioritized based on avail-able funding, potential part-nerships and the likelihood of implementationand reviewed by the City and the Maine DEP.

5a. Approximately 600 specific structural stormwater manage-ment opportunities were prioritized, based on a scoring matrix deter-mined appropriate by City, MaineDEP and consultant.

5b. Stuctural stormwatermanagementopportunitiesreduced to a”Top 65”.

5c. Top 65 sorted based on the stakeholder priority of project type.

HART Book WATeRsHeD MAnAgeMenT BAsis FoR AcTion plAn

thewatershedassessmentresultsprovidedthebasisforthehartbrookwatershedactionplan.theactionplanisaplanproposedbytheCitythatwillhelpreducestormwaterpol-

lutantloadingtothestream,decreasestreamtemperatureimpactsandprovidespecificoutreachtothelandownersandusersofthewatershed.thehartbrookwatershedactionplanwasdeveloped

cooperativelythroughastakeholder-basedplanningeffortandthespecificsarelistedherein,inorderfromthehigh-estpriority.

hartbrookwatershedmanagementplan|woodard&Curran a-3DRAFT

AcTion plAn pRioRiTies

Develop a Watershed Working groupInordertoimplementthehartbrookwatershedactionplan,thereisaneedforanestablishedwatershedworkinggroup.theworkinggroupwillprovideassistanceonthedevelopmentofgrantapplications,provideprogramoversight,identifyfinancialincentivesforimprovedstormwatermanagementandsupportothercriticaleffortsinthesuccessfulimplementationoftheplan.

thewatershedworkinggroupwillbecomprisedofCitystaffrepresenting:engineering,publicworks,cityarborist,planning,codeandeconomicdevelopment,keywatershedstakeholdersandmembersofcivicorganizationsrelevanttothetasksoutlinedinthehartbrookwatershedactionplan.thewatershedworkinggroupwillmeetonascheduledbasistoreviewandimplementactionplanprioritiesandwillbefacilitatedthroughthelewistonpublicservices–engineeringdivision.

subwatershedFocus allpotentialFundingsource Citynpdesms4programbudgetCostestimate(annual) $2000Fundingrationale staffingandprinting.schedule: Firstmeetingsummer/Fall2008toreviewfinalplan.

summer student stormwater programtheCityoflewistoncurrentlyemploysinternseachsummertoassistintheimple-mentationofvariouspublicworksactivities.thehartbrookwatershedactionplan,npdesms4permitcomplianceandotherstormwater-relatedactivitieswillrequireanincreasinglevelofeffortfromCitystaffforimplementation.

summerinternscouldprovidevaluablesupportfortheimplementationofthehartbrookwatershedactionplan.specifically,internscouldimplementstorm-drainstenciling,yardscapingoutreach,shadetreeplanting,andstormwaterbmpinspec-tionsamongothers.thewatershedworkinggroupwillexploreopportunitiesforpartnershipswiththeuniversityofsouthernmaine-lewiston/auburnandCentralmaineCommunityCollegeasasourceofsummerinternsandpossiblecost-sharinginitiatives.

subwatershedFocus allpotentialFundingsource Citynpdesms4programbudgetand/orgrants

includingthedavisConservationFoundationandJohnsageFoundation,amongothers.

Costestimate: $��5,055over5years$3�,0��inYear�and$2�,0��eachsubsequentyear

Fundingrationale staffadministrationandoversight,internsalary,initialgrantwritingeffort,trainingsandgrantreporting.

schedule: programdevelopmentFall2008.Firstinterns2009

Summer interns can help implement the Action Plan.


private commercial Facility owner outreach programCommercialandindustriallandownersareanimportantcomponentofthelocaleconomyandfuturedevelopmentandredevelopmentbytheselandownersshouldnotbejeopardizedbyunbalancedregulatorystandardsorincreasinglymorestrin-gentstormwaterrequirements.

thehartbrookwatershedassessmentidentifiedlargeimper-viouscommercialandindustrialfacilitiesaslikelysourcesofstormwaterpollutants.parkingareasandrooftopsoccupyapproximately�2%ofthewatershedlandareaandalargepercentageofthisisincommercialorindustrialownership.thereareapproximately825propertieswithintheindustrialandcommercially-zonedportionsofthewatershed.

Inordertocontinuetodevelopandredevelopwithinthiswatersheditwillbecriticalforthewatershedworkinggrouptoprovideinformationonthebestmanagementofstormwaterrunofffromprivatefacilitiesandtoidentifygrantopportunitiesandincentivesforthestructuralretrofittingofinfrastructureforwaterqualityimprovements.

theoutreachtocommercialandindustriallandownersinthewatershedwillbeledbythewatershedworkinggroupandincludethefollowingactivities.

a) Compilemailinglistsforcommercialandindustriallandownerswithinthewatershed.obtaincontactinformationforfacilitymanagers.

b) Identifylocalcontractorsthatprovide“stormwater-friendly”landscapeandpavementmanagementservicesandthosethatspecializeinretrofittingstormwatermanagementsystems.

C) workwithlewiston-auburneconomicgrowthCounciltodevelopaninitialmailingprovidingspecificinformationonthehartbrookwatershedandtheeconomicimportanceofactionstoreducepollutantloadsandthermalpollutionofthebrook.theinitialmailingwillprovidespecificinformationonnon-structuralfacilitymanagementsuchas;vacuumpavementsweeping,alternativedeicers,lowornofertilizerandtoxicslandscapemanagement,appropriatepavementsealants,andsnowremovalandstoragestrategiesandalistoflocalcontractorsprovidingtheseservices.

d) Initiatesitewalksonpropertiesidentifiedwithstructuralretrofitpotentialtodiscussopportunitiesforincludingstormwatermanagementretrofitsthroughcapitalimprovements.opportunitiesforfinancialincentivesandgrantwritingsupportwillbeoutlinedforlandowners.

e) workwithinterestedlandownerstodevelopfinancingandtechnicalstrategiesforimplementationofnon-structuralandstructuralstormwaterbestmanagementpractices.

F) maintaincontactwithfacilityownersthroughregularemailupdatesconcerningtrainings/workshops,grantopportunitiesand“stormwaterfriendly”landscapeandpavementmanagementcontractors.

The Lewiston Industrial Park off of Westminster Street.


subwatershedFocus allpotentialFundingsource Citynpdesms4programbudgetandgrantfunding.

thepossibilityofincentivesthroughthestormwaterutilityFeeCreditsystemwillalsobeexplored.

Costestimate $�3,900Fundingrationale staffadministrationfordevelopmentandproductionof

mailings,postage,mailingcosts,sitewalks(assume�6properties),consultantfeefortechnicalsupport,developmentofspecificfinancingstrategiesforinter-estedlandownersandperiodicemailupdates.

schedule Initialmailingwinter2008.sitevisitsscheduledfor2009.

Yardscaping outreach and educationresidential,commercialandindustriallandownersmanageover428acresoflawnwithinthehartbrookwatershed(22%ofthewatershedarea).thepotentialforfertil-izer,pesticideandherbicidemigrationfromthesemanagedsurfacesintohartbrookishigh,particularlyintheValleysection,Industryandgoffbrooksubwatersheds,wherelawnmakesupasignificantportionofthesubwatershedareas.themainebureauofpesticideControldistributionandusereportsshowasharpriseintheuseofpesticidesinmainefrom800,000poundsin�995to3,000,000poundsin2004.mostofthismaterialwasacom-binationoffertilizersandpesticides(weed&feedproducts)appliedtoresidentialandcommerciallawns.

Inanefforttoreducethepotentialfornutrientandtox-icstoflowintohartbrookitwillbeimportanttoreduceoreliminatetheuseoffertilizers,pesticides,andherbicidesonwatershedlawns,reducethepotentialforerosionfromthesesurfaces,improvesoilconditionwithinlawnareastomaximizerainfallinfiltrationandevapotranspirationandcreateopportunitiesforshallowstorageandevaporationofsmallrainfalleventsinconstructedraingardenswithinlawnareas.Yardscapingprogramsarebeingsuccessfullyimplementedatastate-levelthroughthemaineboardofpesticideControlandlocallythroughtheuniversityofmaineextensionandtheandroscogginValleysoilandwaterConservationdistrict(aVswCd).

theYardscapingoutreachandeducationeffortwillbeledbythewatershedworkinggroupandconsistofthefollowingactivities.

a) Initiateasubwatershed-basedevaluationoflawnsurfacestoidentifypotentialtargetareasforoutreach.theevaluationwillfollowguidancefromtheCenterforwatershedprotection’sunifiedsubwatershedandsitereconnaissancemanual(www.cwp.org).

b) Identifylocalcontractorsthatprovidelandscapemanagementservices.Identifylocalhardware,garden/landscapesupply,andcommercialoutletsthatsellfertilizer,herbicidesandpesticides.obtaincontactinformationofrelevant

Large setback lawn areas along Webster Boulevard.


ownersandmanagers.C) workwithcontractorsandcommercialsupplystorestoprovide“stormwater-

friendly”servicesandsupplies.d) Initiateneighborhoodworkshopsonyardscapingpractices.e) Implementyardscapingandraingardendemonstrationprojectsonresidential

andcommercialpropertieswithinprioritytargetareaswithinthewatershed.F) maintaincontactwithlandscapecontractorsandcommercialsuppliersthrough

regularupdatesconcerningtrainings/workshops,grantopportunitiesand“stormwaterfriendly”landscaperesearch.

subwatershedFocus allpotentialFundingsource npdesms4programbudgetandmainedep3�9

grantFundingCostestimate $��9,775over5yearsFundingrationale administrationoversightandcooperationwith

aVswCdforimplementationofyardscapingoutreachandeducationprogram(basedonsuccessfulprograminCumberlandCounty)andprogrammaterialdevelop-mentincludingbrochures,website,lawnflags,mailingsandyardscapingkits.

schedule Initialsubwatershedevaluationinsummer2008.

sanitary sewer Assessmentexistenceofcracksinthesanitarysewerlinesweredocumentedbyedwardsandkelcey,consultantstotheCity,in2006andverifiedduringstreamsurveyscon-ductedbyFieldgeologyservicesin2007.Itisnotclearifthesecrackscontributetosanitarysewageleaks,butthehartbrookwatershedcontainsover56,000linearfeetofsanitarysewerthatisover25yearsold.assanitaryinfrastructureages,thelikeli-hoodofpipefailures,openjointsandleaksincreaseandthepotentialexistsformigrationofsanitarysewagetothestream.over�9,000linearfeetofsanitaryseweriswithin75’ofthemainstemofhartbrook.additionally,numerousstreamcross-ingsbysanitarysewermayincreasethelikelihoodofsewerleaksduetostreamerosionandunderminingofconcreteabut-mentsandsewersupports.largedailyfluctuationsofdissolvedoxygenwithinhartbrookindicatethatthereisaconcentratedsourceofnutrients,whichamongotherthings,maybeindicativeofsanitarysewagecontamination,inthewatershedabovethemainedepsamplinglocations.

thespecificactionunderthisitemisatier�evaluationofsani-tarysewerpipewithinthehartbrookwatershed.atier�evalu-ationwouldincludeapreflushingandtelevisingofthesanitarysewerpipetodeter-minelocation,sizeandseverityofexistingcracksandleaks.theprimaryfocusoftheevaluationshouldbethe��,745’of�8”to24”sewersand6243’of24”+diameterprimaryinterceptor.thiswouldincludemuchofthe“streamside”sanitarysewerline.

Sanitary sewer lines run along much of the Hart Book.


subwatershedFocus allpotentialFundingsource CityCapitalImprovementsplan(CIp)budget.Costestimate $78,�95fortier�evaluation.Fundingrationale estimatesbasedonconversationswithlocalsewer

lineinspectioncontractorregardingcostperlinearfootforvariouspipesizes(2007).

schedule tbd

city of lewiston effortsthefollowingactionitemsincludeavarietyofstructuralandnon-structuralactivi-tiestobeinitiatedbytheCityoflewistonasfundingismadeavailableorobtainedthroughgrants.

Roadway pavement Management. thehartbrookwatershedcontainsover36milesofroadway.thisincludes2�milesofcity-ownedroadwayand�5milesofstateorstate-aidroadwaysofwhich5milesisoperatedandmaintainedbythemaineturnpikeauthority.roadwayimpervioussurfacescover7%ofthewatershedarea.roadwayshavebeenshowntogeneratesomeofthehigheststormwatergeneratedpollutantloadsinnationalresearchbutopportunitiesforinstall-ingstructuralstormwatermanagementpracticesareoftenlim-itedduetonarrowrightofway,adjacentsidewalksandotherutilityconstraints.

Inanefforttoreducethepotentialforpollutantloadingfromroadways,enhancedmanagementisnecessaryandshouldincludetargetedpavementsweepingandcatchbasincleaning.pavementsweepingisconsideredtobe�0timeslessexpen-sivethancatchbasincleaningandisthereforeavalueaddedactivity.pavementsweepingforstormwaterpollutantreductionsmustbeaccomplishedbyusingthebestavailablevacuumorregenerativeairtechnologies.theconventionalmethodutiliz-ingmechanicalbroomsweeperscanprovideremovalofheavyparticles,operateinwetconditionsandreducecatchbasincleaningbutdoverylittleforstormwaterpollutantloadswhichareprimarilyattachedtofineparticles.researchintheuppermid-westportionsoftheunitedstates,hasdocumentedthatwiththeappropriatestreetsweepingequipment,totalsuspend-edsediment(tss)canbereducedbyapproximately20%inawatershedthroughatargetedpavementsweepingprogramfromspringthroughfall.

Currently,thehartbrookwatershedissweptprimarilyinthespring.atargetedstreetsweepingprogram,utilizingtheCity’snewvacuumsweeper,couldbedevelopedinthehartbrookwatershedforstormwaterpollutantreductions.atargetedsweepingprogramshouldincludethefollowing:

a) sweepingofwintersandassoonaspossibleinthespringaftersnowmelt.hartbrookwatershedroadswouldbeaprimaryfocusarea.sweepingforwintersandshouldincludeasinglepasswithamechanicalbroomforheavyparticlesandasecondpasswithavacuumsweeper.

Pavement maintenance will be an important part of the Action Plan.


b) earlysummersweepingofallarearoadwaysafterspringtreeseedandflowerdrops.

C) latesummersweepingafterextendeddryperiodsontargetedroadwaysthataredirectlyconnectedimperviousareasandcarrylargevolumesoftraffic,includingbutnotlimitedtoroute�96,Industrialparkroadwaysandpleasantstreet.

d) Fallsweepingafterleafdrop.

pavementbestmanagementpracticesshouldalsocontinuetoincludecatchbasincleaningwhichiscurrentlyanannualactivitybytheCityoflewiston.

subwatershedFocus allpotentialFundingsource stormwaterutilityFeeCostestimate $20,000annuallyFundingrationale additionalspring,summerandfallsweepingwould

requireadditionalstaffingandequipmentusebyhighwaydepartment.estimateisbasedonmilesofhighwaywithinwatershedandsweeperusemilesofroadwayperday(6-8milesperday).Costestimateisbasedoncitystaffandannualmaintenanceonvacuumsweeper.

schedule ongoing

Town Roadway erosion Reduction. numerousroadwayswithinthehartbrookwatershedwerenotedduringfieldevaluationashavingexcessiveshouldererosion.Inordertoreducesedimenttransporttothestreamandtoimproveareaaesthet-ics,theCitywillactivelypursueopportunitiestoaddressshouldererosionthroughmaintenance.specificareasofconcernwerenotedalonggoddardroad,websterblvd.atthehartbrookcrossing(Valleysection)andalongtheroadwayswithintheIndustrialpark.

roadshoulderandditchstabilizationshouldfollowguidancefromthemainedotbestmanagementpracticesmanualandwouldincludegrading,turnouts,crushedstonestabilizationand/orshoulderpavingifnecessary.potentialintegrationwithidentifiedroad-edgestormwaterretrofitsmaybepossibleinmanylocationsandwouldbepreferredifnewpavementandcurbingareimplementedasapartofshoul-derimprovements.

subwatershedFocus allpotentialFundingsource Cityhighwaydepartmentmaintenancebudgetand

mainedotsurfacewaterQualityprotectionprogram.Costestimate undeterminedschedule tbd


shade Tree planting. upperhartbrook,withintheIndustrysubwatershed,flowsthroughaconcrete-linedcanalforover3/4milebeforereturningtoa“natural”flood-plain.theconcretechannelcontributestotemperatureincreases,asdocumentedinthehartbrookwatershedassessment,andlikelyreductionsindissolvedoxygenthatmaycontributetooverallstreamimpairment.

Inanefforttomaintaintemperaturesofstreamwaterthroughtheconcrete-linedpor-tionofthestream,plantingofshadetreesalongthechannelisbeinginvestigated.ashadetreeplantingprogramwillneedthoroughplanningsothatitcanbeexecutedwithoutcompromisingtheintegrityoftheconcretechannel.Fastgrowingtreessuchaspoplarorbirchwillbeconsideredfortheplantingplan.theplantingplanshouldbeprovidedforreviewtolandownersandadjacentpropertyowners.lewistonisatreeCitywithestablishedtreeplantingpoliciesanditisassumedthattheCityarbor-istwouldoverseethisactionitem.alandscapeplanandshadetreeplantingalsohastheaddedbenefitofimprovingaestheticsintheIndustrialpark.

subwatershedFocus IndustrypotentialFundingsource CompensationFeeutilizationplanorprojectCanopy

grantprogram.Costestimate: $60,000Fundingrationale: developmentoflandscapeplantingplan,publicmeet-

ings,purchaseoftrees,plantingalongconcretechan-nelandfirstyearmaintenance.

schedule: tbd

industrial park Roadway enhancement. Forrestallstreet,saratogastreet,westminsterstreet,andlexingtonstreetofferaccesstotheindustrial/commercialfacilitiesofthelewistonIndustrialpark.thepavedtravelwayis36’wideandhasnocurbing.theseroadsandtheirstormsewer/drainageinfrastructurearedirectlycon-nectedtohartbrook.lackofcurbingandheavytrucktrafficcontributestoerosionontheshoulderswhichdraintothestormsewer.Failingshouldersinsomeloca-tionsappeartobechronicmaintenanceproblems.duringwarmmonthsthestreetsbecomewalkingareasforIndustrialparkemployeesandseasonalfoodvendorssetupstandsinvariouslocationsthroughoutthepark.

InordertoreduceshouldererosionandpromoteaestheticimprovementsforIndustrialparkemployeesthisactionproposesastormwaterimprovementandroad-wayenhancementprojectasademonstrationalongselectportionsoftheseroad-ways.shoulderstabilizationcouldbeaccomplishedthrough“mountable”curbingwithperiodiccurbbreakstoroutegutterstormwaterflowtoroadright-of-wayraingardensand/orstormwaterfilterspriortoreachingacatchbasininlet.Insomeareas,road-sidetreeplantingandsidewalksmaybeappropriate.thisactionitemcouldbeinte-gratedwiththeshadetreeplantingactionItemasanoverallenhancementoftheaestheticsforsaratogast.partnersforthisprojectcouldincludelocalgardenclubs,lewiston-auburneconomicgrowthCouncil,lewistonadopt-a-spotorganizations,andlocalbusinessesforroadedgeraingardenmaintenance.thelinkto“lunch-hour”wellnessandfitnessprogramsmaybroadengrantfundingopportunities.

Lewiston’s Adopt-A-Spot could be integrated with stormwater filters for Industrial Park roadway

enhancement.

Photo simulation of tree planting along concrete channel.

woo woodard&Curran|hartbrookwatershedmanagementplana-�0 DRAFT

subwatershedFocus IndustrypotentialFundingsource CityCapitalImprovementplan(forinfrastructure

upgrades),mainedottransportationenhancementprogram,mainedotsurfacewaterQualityprotectionprogramandothergrants.

Costestimate: $60,448(thiscostonlyincludesdesignandconstruc-tionofspecificdemonstrationraingardenlocations)plusallcostsforcurbing,esplanadeandsidewalksdependentonthelocationandscaleoftheproject.

Fundingrationale: engineer’sestimatefor8stormwaterretrofitsmanag-ing0.86acresofdevelopedareaand0.68acresofimperviousarea.

schedule: tbd

stormwater BMp inspection and Maintenance ordinance. themaintenanceofstormwaterstructuralsystemsconstructedasapartofredevelopmentornewdevel-opmentprojectsiscriticaltolong-termfunctionality.Finalinspectionsafterinstallationandannualinspectionoverthelifeofthesystemisacurrentrequirementofmunici-palpermittinginmanystates.

Inordertoensurethelong-termoperationofstormwaterstructuralmanagementsystems,theCityoflewistonintendstoadoptaninspectionandmaintenanceordi-nanceforinstalledstormwaterstructuralsystems.themainemunicipalassociationhasdevelopedadraftordinancethatwillbeconsideredandmodifiedforlocaluse.asoneoptiontoimprovethemanagementoftheseordinancerequirements(includ-ingannualinspectionsubmissions),theCityoflewistonwillbeconsideringthedevelopmentofaweb-based,geographicInformationsystem(gIs)enabledtrack-ingandmanagementsystemforstormwaterbmps.thissystemcouldbedevelopedtoprovideautomaticreminderstofacilityownersunderformalmaintenanceagree-mentsandwouldreducestaffburden.proprietarysoftwareorcustomapplicationscouldbeacquiredordevelopedforCityuse.

subwatershedFocus allpotentialFundingsource Citynpdesms4permitprogramandgrantsfor

developmentofautomatedtrackingsystem.Costestimate $25,000(Initialinvestmentfordevelopmentofauto-

matedtrackingsystem)Fundingrationale softwaretesting,acquisitionandimplementation.staff

timeforimplementationandmanagementofordinancewouldvarydependingonlanguageinordinance.

schedule tbd

hartbrookwatershedmanagementplan|woodard&Curran a-��DRAFT

Watershed Monitoring program. Currentlythereislimitedwaterqualityandquan-titydataforhartbrook.themainedepprovidesinfrequenttestinginsingleloca-tionsforcompliancewithstatewaterclassificationrequirements.Inordertomorefullyunderstandthewatershed,sourcesofpollutantsandthebenefitsofparticularactions,theCityplanstoestablishawatershedmonitoringprogram.

thewatershedmonitoringprogramshouldconsistofperiodicwaterqualitysam-plingunderbaseflowconditions(3samplingevents)andstormflowconditions(3samplingevents)inpredeterminedlocationswithinthewatershed(atleast4)onanannualbasis.thesamplingprogramshouldbedevelopedincooperationwiththemainedepandincludeaQualityassuranceprojectplan(Qapp).waterqualitysam-plingwouldincludetotalsuspendedsolids,nutrients,metals,bacteria,andtotalpetroleumhydrocarbons.additionally,awatershedmonitoringprogramcouldincludethedevelopmentofastaffgageataneasilyaccessiblelocationwithinthewater-shed.thestaffgagewouldallowfortheestablishmentofastage-dischargecurveinordertomonitorstreamflowrate.animprovedunderstandingofthestream’sresponsetorainfallwouldallowforrefinedfuturemodelingefforts.thewatershedworkinggroupmayconsiderthedevelopmentofastreamteamprogramthatwouldprovidevolunteerlaborforthemonitoringandsamplingofthewatershed.streamteamactivitiescouldincludestreammacroinvertebratesamplinginordertoimproveunderstandingofthewatershed’saquaticcommunity.theCityoflewistonwillinvestigateoptionsforworkingwiththelewistonauburnwaterpollutionControlauthoritytousetheirlaboratoryfacilitiesforwaterqualitytestingandreferenceothersuccessfulvolunteer-basedmonitoringprogramsinmaine.

subwatershedFocus allpotentialFundingsource Citynpdesms4permitprogrambudgetandgrants.Costestimate $�35,350forannualtestingoverfiveyears.Fundingrationale samplingcontractorpersonnel,equipment,andlabo-

ratorytesting.developmentofstaffgage,stagedis-chargecurveandstreamteamprogram.

schedule tbd

exit 80 Access Master planning. maineturnpikeexit80,locatedwithinthehartbrookwatershedisbecomingafocalpointfornewdevelopmentwithinthecity.Currentlyzonedindustrialandcommercialareaswithintheunderdevelopedportiontothesouthofexit80arebeingpromotedfornewdevelopment.

thisactionitemproposestointegratestormwatermasterplanningintothetrafficmovementandengineeringevaluationswhenreviewingfutureroadwayreconstruc-tionandnewaccesscorridorswithinthisdevelopingarea.asubcommitteeofthewatershedworkinggroupcomprisedofeconomicdevelopment,planningandengi-neeringstaffalongwithkeystakeholders(orotherexistingzoningcommittee)couldbeformedtoidentifyimprovementswhichwouldbeincorporatedintothefuturedevelopmentofthisarearelatedtoaccess,roadwaysandstormwatermanagement.thewatershedworkinggrouporrelevantsubcommitteewillcooperatewithCitystaffandtheandroscoggintransportationresourceCenteronthisactionItem.

Watershed monitoring will improve understanding of the watershed.

Undeveloped land in vicinity of Exit 80.


subwatershedFocus InterchangeandlowerpotentialFundingsource Citynpdesms4permitprogrambudgetandgrants.Costestimate n/a–noadditionalcosttoplan.Integratestormwater

managementcostsduringaccesspermitting.schedule tbd

private commercial Actionsthefollowingactionitemsincludestructuralandnon-structuralactivitiestobeiniti-atedbytheprivatecommercialsectorwithCitysupportasfundingismadeavailableorobtainedthroughgrants.

Demonstration stormwater Disconnection projects. Cooperationwithprivatecommercialfacilityownerswillbecriticaltothesuccessfulimprovementofthehartbrookwatershed.theIndustrysubwatershedisespeciallychal-lengedwithextensiveprivatedevelopment,aconcrete-linedchannelanddirectdischargesofstormwaterfromroadwaysandprivatefacilities.whileheavilydeveloped,zoningset-backrequirementswithintheindustrialzonehaveallowedforsignifi-cantareasofundevelopedlawnandlandscapedareasonindi-vidualparcels.theseundevelopedset-backsprovidepotentiallocationsfordemonstrationstormwaterretrofitswithoutsignifi-cantlimitationsonfuturebuild-outopportunities.

thestructuralretrofitassessmentinventoryidentifiedthirteenpropertieswithintheIndustrysubwatershedasviablepotentiallocationsforstormwaterstructuralretrofits,basedonthepriori-tizationprocessofstructuralopportunities.theCityproposestoinitiateadialoguewithfacilityownersoftheseparcelsregardingthepossibilityofvoluntarystormwaterretrofittingontheirfacili-ties.stormwaterretrofitsontheseparcelswouldlikelyrequirepavementre-grading,disconnectionsofroofdrains,andtheinstallationofengineeredstormwatermanagementsystems.thedialoguewithfacili-tyownerswouldincludeareviewoffutureparcelexpansionsand/orfacilityupgradesandinvestigationofthefeasibilityofretrofitsthatcouldbeincludedasapartoftheseimprovements.Itisplannedthatdiscussionswithprivateownerswillbeinitiatedthroughthelewiston-auburneconomicgrowthCouncilandCityeconomicdevelop-mentstaff.

subwatershedFocus IndustrypotentialFundingsource CompensationFeeutilizationplanandgrantfunding.

privatefundingwiththepossibilityofincentivesthroughthestormwaterutilityFeeCreditsystemwillalsobeexplored.

Costestimate $458,550Fundingrationale engineer’sestimatemanaging9.76acresofdeveloped

areaincluding8.22acresofdirectlyconnectedimpervi-ousarea.

schedule tbd

Grant funding for private facility retrofits will create good demonstration projects.

hartbrookwatershedmanagementplan|woodard&Curran a-�3DRAFT

Demonstration stormwater Disconnection projects. Cooperationwithprivatecommercialfacilityownerswillbecriticaltothesuccessfulimprovementofthehartbrookwatershed.theInterchangesubwatershedisanolderzoneofdevelopmentwithanextensiveareaofdirectlyconnectedimperviousareaincludingCommercialstreet,Ferryroadandadjacentfacilities.smallsetbacksinthisarealimitopportuni-tiesforstormwaterretrofitmanagementbuttwolocationswithinthisdevelopedareamadethetop65retrofitlist.

theCityproposestoinitiateadialoguewithfacilityownersoftheseparcelsregard-ingthepossibilityofvoluntarystormwaterretrofittingontheirfacilities.stormwaterretrofitsontheseparcelswouldlikelyrequirepavementregrading,disconnectionsofroofdrains,andtheinstallationofengineeredstormwatermanagementsystems.thedialoguewithfacilityownerswouldincludeareviewoffutureparcelexpansionsand/orfacilityupgradesandinvestigationofthefeasibilityofretrofitsthatcouldbeincludedasapartoffacilityimprovements.Itisplannedthatthesediscussionswithprivateownerswillbeinitiatedthroughthelewiston-auburneconomicgrowthCouncilandCityeconomicdevelopmentstaff.

subwatershedFocus InterchangepotentialFundingsource CompensationFeeutilizationplan.privatefund-

ingwiththepossibilityofincentivesthroughthestormwaterutilityFeeCreditsystemwillalsobeexplored.

Costestimate $32,409Fundingrationale engineer’sestimatemanaging0.2�acresofdeveloped

areaincluding0.�7acresofdirectlyconnectedimper-viousarea.

schedule tbd

Riparian enhancement Below overhead utility lines. streamsideshadingalonghartbrookwillreducestreamtemperatureandprotectthestreamfromexcessivealgalgrowthandassociatedreductionsinstreamdissolvedoxygen.

Centralmainepower(Cmp)managesautilitycorridorinthelowersubwatershedthatcrosseshartbrook.Cmpcurrentlyprovidesmanaged,vegetatedbuffersbetweenutilitycorridorsandstatehighways.theCitywillinitiateadiscussionwithCmpregardinganexpansionoftheprogramtoincludeperennialstreamsidezonesattheutilitycrossingofhartbrook.theactionitemwouldincludethedevelopmentofaplantingplanwithintheutilitycorridorthatwouldprovidelong-termshadingforthatsectionofstream.CooperativeplantingwiththeCityoflewistonand/orwater-shedvolunteerswillbeinvestigatedasameansofexecutingthisactionitem.

subwatershedFocus lowerpotentialFundingsource mainedep3�9grantfundingforplantsandlabor.

CmppartnershipFunding.Cost $�0,200Fundingrationale 275linearfeetofstreamwithintheutilitycorridorand

40’streamsideplantingwidth.schedule tbd


state Actionsthereare6milesofstate-aidhighway,4milesofstatehighwayand5milesofmaineturnpikewithinthewatershed.overallroadwayimpervioussurfacesoccupy7%ofthewatershedarea.roadwayshavebeenshowntogeneratesomeofthehigheststormwaterpollutantloadsinnationalresearchbutopportunitiesforstruc-turalstormwatermanagementpracticesareoftenlimitedduetonarrowrightofwayandadjacentsidewalksandotherutilities.

thefollowingactionitemsincludesstructuralandnon-structuralactivitiestobeinitiatedbytheCityandimplementedbythestateasfundingismadeavailableorobtainedthroughgrants.

Maine Turnpike Deicer Management strategy. thewintermaintenanceofroadwaysiscriticaltopublicsafety.unfortunately,theuseofsandandsaltforwintericeandsnowcontrolcanhavedeleteriouseffectsonstreamwaterqualityandaquaticcommu-nities.themaineturnpikecrossesthehartbrookthreetimesandchloridedischargesfromtheroadwayintheseareasmayhaveimpactsonthereceivingstream.

theCityproposesadiscussionbetweenthemaineturnpikeandthewatershedworkinggrouptoinvestigateopportunitiesforareductionoralternativetotraditionalhighwaydeicing.thisactionitemwouldincludetheidentificationandmappingoftheturnpikedrainagesystemandadeterminationofwhetherdischargesfromtheturnpikecontainhighlevelsofchlorideswhicharelikelytoreachthebrook.thewatershedworkinggroupwouldengageindiscussionswiththemaineturnpikeauthoritytodevelopanappropriatemethodforreductionofchloridesinstormwaterrunoff.aconsiderationofsaltalternativesmayalsobeconsideredforuseintheseareas.extensiveresearchontheuseofpotassiumacetate,sodiumacetate,sodiumformate,calciummagnesiumacetate,magnesiumchlorideandothersarebeingcon-ductedacrossthecountryandshouldbeconsideredincost-benefitscenarios.

subwatershedFocus lowerpotentialFundingsource grantresearchfunding.Costestimate unknowndependingonlevelofeffort.schedule tbd

state Roadway stormwater Disconnection Demonstrations. route�96andadjacentprivatefacilitieswithinthehartbrookwatershedaredirectlyconnectedimperviousareas.manyoftheadjacentdrivewayaccess,parkingareasandrooftopsareconnectedtotheroute�96stormsewerinfrastructurethroughcloseddrainageorsurfacedrainage.stormwaterfromthisinfrastructureentersthehartbrookatthreeprimarylocations.

theCitywillutilizethestormwaterretrofitinventoryresultstoidentifyopportunitiesforthemitigationofstormwaterrunofffromroute�96inroadsetbackareasandbegindiscussionswiththemainedotregardingfundingprograms.goodstructuralretrofitopportunitiesexistinthecloverleafareaatthealfredplourdeparkway-route�96interchangeandalongroute�96eastofelmettechnologies.

Winter maintenance poses a challenge for stormwater best management.

Route 196 setbacks offer good opportunities for stormwater retrofits.

hartbrookwatershedmanagementplan|woodard&Curran a-�5DRAFT

subwatershedFocus oldlisbonandlowerpotentialFundingsource mainedotsurfacewaterQualityprotectionprogramCostestimate: $�20,000Fundingrationale engineer’sestimateforsegmentofroute�96east

ofelmettechnologies.estimatebasedonidentifiedstormwaterretrofitopportunityareasandthecostsofretrofitsystemswithintheprojectarea.

schedule tbdResidential ActionstheValleysectionandspecificallythepondroadneighborhoodswithintheIndustrysubwatershedcontainsignificantresidentialareas.muchoftherunofffromtheseareasisdirectedintotheCity’sstormsewersystemwithuntreateddischargesdirect-lytohartbrook.pollutantloadsfromresidentialareascanbeveryhighinnutrientsandbacteriaandroadwayanddrivewayrunoffcontributestothermalpollution.

Inanefforttoaddressstormwaterrunoffintheseareas,theCitywillconsideraprogramtodevelopneighborhoodraingardensbothalongcityroadwaysandonprivateproperty.thisprogramwilllikelyrequirepublicoutreachandcommunitymeetings,theidentificationofpropertyownerswillingtohaveraingardensontheirpropertiesandthedesignandimplementationofthestormwatermanagementsystems.partnershipopportunitiesincludelocalgardeningclubs,aVswCd,maineCooperativeextensionandlocallandscapingcontractorsandsupplycompanies.

subwatershedFocus IndustryandValleysectionpotentialFundingsource mainedep3�9grantprogram,mainedot

transportationenhancementprogramandothercom-munityimprovementgrantsprogramsincludingCdbg.

Costestimate $49,900Valleysectionneighborhoods$84,400pondroadneighborhoods

Fundingrationale engineer’sestimatebasedonidentifiedstormwaterretrofitopportunityareaswithinthetop65stormwaterretrofits.thesecostscouldvarydependingonprivateraingardendevelopmentsubsidiesandthelikelyinclu-sionofnon-top65retrofitsinthevicinityofpriorityprojectsites.

schedule tbd

Road edge raingardens will enhance aesthetics and provide water quality treatment.

AcTion plAn - Lewiston, Maine

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