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    ANTIETAMCREEKWATERSHEDRESTORATIONPLAN

    September17,2012

    Creationofthiswatershedplanwasacooperativeeffortby:

    TheWashingtonCountySoilConservationDistrictTheBoardofCountyCommissionersofWashingtonCounty

    TheAntietamCreekWatershedAllianceTheCanaanValleyInstitute

    andMarylandDepartmentoftheEnvironment

    ScienceServicesAdministrationTMDLImplementationDivision

    Photoby:JenGoellnetzhttp://www.flickr.com/photos/goellnitz/4609441907

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    TableofContents

    1.INTRODUCTION.............................................................................................................................. 1

    2.WATERSHEDCHARACTERIZATION................................................................................................. 52.1LandUse.............................................................................................................................................72.2Geology ..............................................................................................................................................92.3HistoricalandRecreationalSignificance ..........................................................................................15

    3.WATERQUALITY........................................................................................................................... 173.1WaterQualityStandards..................................................................................................................173.2TMDLSummaries .............................................................................................................................18

    3.2.1Sediment................................................................................................................................203.2.2Bacteria ..................................................................................................................................233.2.3ChesapeakeBayTMDL...........................................................................................................24

    3.3WaterQualityObjectivesandGoals ................................................................................................25

    4.NONPOINTSOURCEINVENTORY(CRITERIONA)........................................................................ 274.1Sediment ..........................................................................................................................................274.2Bacteria ............................................................................................................................................34

    5.NONPOINTSOURCEMANAGEMENT(CRITERIONB) .................................................................. 405.1Sediment ..........................................................................................................................................405.2Bacteria ............................................................................................................................................435.3PotentialTreatmentTechnologies(CriterionC) ..............................................................................46

    6.TECHNICALANDFINANCIALASSISTANCE/BENEFITS(CRITERIOND)........................................... 496.1TechnicalAssistanceNeedsandPartners ........................................................................................496.2FinancialAssistanceNeeds ..............................................................................................................49

    7.INFORMATION,EDUCATIONANDPUBLICPARTICIPATION(CRITERIAE) .................................... 55

    8.IMPLEMENTATIONSCHEDULEANDMILESTONES(CRITERIAF/G) .............................................. 598.1PhaseI(20122017) .........................................................................................................................598.2PhaseII(20182025) ........................................................................................................................61

    9.LOADREDUCTIONEVALUATION(CRITERIONH).......................................................................... 629.1StreamSegmentCriterionforBiology .............................................................................................63

    10.MONITORING(CRITERIONI) ...................................................................................................... 6410.1PhaseIMonitoringPlan .................................................................................................................6410.2PhaseIIMonitoringPlan ................................................................................................................66

    REFERENCES: .................................................................................................................................... 68

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    LISTOFFIGURES:Figure1AntietamCreekWatershedlocation.................................................................................................................4Figure2AntietamCreekSubwatersheds.......................................................................................................................6Figure3LandUseMapofAntietam ................................................................................................................................8Figure4DistributionofAntietamCreekGeologicFormations .....................................................................................10Figure5DistributionofAntietamCreekHydrologicsoils .............................................................................................13Figure6DistributionofAntietamCreeksoils ...............................................................................................................14Figure7SedimentTMDLSegmentation ........................................................................................................................19Figure8MBSSandBacteriaSamplingstations..............................................................................................................22Figure9AntietamCreekWatershedStreamDesignations............................................................................................26Figure10LittleAntietamCreekSite#1........................................................................................................................28Figure11MainStemAntietamCreek,Site#2 .............................................................................................................29Figure12SmithsburgWastewaterTreatmentPlantsite,(UrbanStreamRestoration) ...............................................30Figure13LittleAntietamCreekatGreensburgRoad(Lettere,inFigure17) ..............................................................32Figure14MapofPrioritySitesIdentifiedforStreamRestoration*.............................................................................33Figure15LocationofSepticSystems............................................................................................................................36Figure16Locationofreplacedsepticsystems .............................................................................................................37Figure17LocationofDairyOperations ........................................................................................................................39Figure18MapofprioritysubwatershedsforbacteriaBMPimplementation .............................................................45Figure19SynopticSurveySites....................................................................................................................................67LISTOFTABLES:Table1MaximumPracticableReductionScenario(2009BacteriaTMDL) ....................................................................3Table2PollutantsidentifiedinTMDL ............................................................................................................................7Table3ApplicableWaterQualityStandardsforBacteria.............................................................................................17Table4CurrentestimatedBaselineLoadsandTMDLsforsedimentforeachloadsourcecategoryintheMarylandportionofAntietamCreekWatershed.(MDE2008)......................................................................................................20Table5TMDLIBIandSSDIScores(MDE2008).............................................................................................................21Table6CurrentestimatedBaselineLoadsandTMDLsforfecalcoliformin9subwatershedsintheMarylandPortionofAntietamCreek.(BacteriaTMDL2009) ......................................................................................................................23Table7AnnualAverageTMDLLoadingCaps ................................................................................................................24Table8EstimationofMDnonpointsourcesedimentcontributionsfromTMDL.......................................................27Table9Estimatedstreamerosioncontributionsfrom15sitesonAntietamCreek. ...................................................31Table10TMDLBaselineloadsandreductionsforallsectors.......................................................................................34Table11AntietamCreekLivestockCensus..................................................................................................................38Table12SedimentReductionsfromNonPointSourcesduringperiodofTMDLdevelopmentto2012 .....................40Table13NonPointSourceStrategyfor2017..............................................................................................................41Table14NonPointSourceStrategytomeetTMDLin2025........................................................................................41Table15UrbanStrategytomeetTMDLin2025 ..........................................................................................

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