Upper Unami Creek Aquatic Resource Assessment and Conservation Plan ______
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UpperȱUnamiȱCreekȱ AquaticȱResourcesȱAssessmentȱandȱ ConservationȱPlanȱ ȱ ȱ 2005 UPPER UNAMI CREEK AQUATIC RESOURCE ASSESSMENT AND CONSERVATION PLAN _________________________________________________________________________________ ȱ Introduction ȱ ȱ InȱtheȱUpperȱUnamiȱCreekȱwatershedȱofȱnorthernȱBucksȱCounty,ȱandȱ everywhereȱonȱEarth,ȱwaterȱisȱtheȱlifebloodȱofȱtheȱland.ȱȱTheȱheavilyȱforestedȱ portionȱofȱthisȱwatershed,ȱknownȱasȱtheȱUnamiȱForest,ȱincludesȱsomeȱofȱtheȱ highestȱqualityȱstreams,ȱwetlands,ȱandȱgroundwaterȱaquifersȱinȱtheȱPhiladelphiaȱ region,ȱandȱrepresentsȱtheȱsecondȱlargestȱcontiguousȱforestȱinȱsoutheastȱ Pennsylvania.ȱȱTheseȱecologicalȱattributesȱareȱaȱtestimonyȱtoȱtheȱstewardshipȱofȱ landowners,ȱmunicipalities,ȱcountyȱandȱstateȱagencies,ȱandȱenvironmentalȱ organizationsȱwhoȱhaveȱworkedȱtoȱprotectȱlocalȱlandscapesȱandȱwaterȱsupplies.ȱȱ Toȱdate,ȱoverȱ1,000ȱȱacresȱofȱlandȱinȱtheȱUpperȱUnamiȱCreekȱwatershedȱhaveȱ beenȱpermanentlyȱprotectedȱbyȱlandownersȱworkingȱwithȱstateȱandȱcountyȱ agencies,ȱmunicipalȱgovernments,ȱandȱnonȬprofitȱconservationȱgroupsȱ(orȱ combinationsȱofȱthese).ȱȱȱ ȱ NaturalȱLandsȱTrustȱhasȱpreparedȱthisȱUpperȱUnamiȱCreekȱAquaticȱResourceȱ AssessmentȱandȱConservationȱPlanȱ(theȱAssessment)ȱforȱtheȱpurposeȱofȱidentifyingȱ parcelsȱofȱlandȱthatȱprovideȱtheȱmostȱeffectiveȱnaturalȱbufferȱandȱecologicalȱ enhancementȱtoȱtheȱhealthiestȱstreamȱreachesȱinȱtheȱUpperȱUnamiȱCreekȱ watershed.ȱȱTheȱupper,ȱBucksȱCountyȱportionȱofȱtheȱwatershedȱwasȱselectedȱ sinceȱitsȱheadwatersȱstreamsȱrepresentȱtheȱtransitionȱfromȱanȱ agricultural/suburbanȱlandscape,ȱandȱassociatedȱnonȬpointȱsourceȱpollutants,ȱtoȱ oneȱthatȱisȱprimarilyȱforested.ȱȱItȱisȱinȱtheseȱstreamsȱthatȱbiologicalȱmonitoringȱ 1 UPPER UNAMI CREEK AQUATIC RESOURCE ASSESSMENT AND CONSERVATION PLAN _________________________________________________________________________________ canȱdemonstrateȱtheȱstreamȱqualityȱimprovementsȱprovidedȱbyȱforests.ȱȱȱTheȱ decisionȱtoȱsampleȱbottomȬdwellingȱaquaticȱinsectsȱandȱwormsȱ(orȱbenthicȱ macroinvertebrates)ȱwasȱmadeȱbecauseȱofȱtheyȱtendȱtoȱbeȱcommon,ȱdiverse,ȱ readilyȱaccessibleȱaquaticȱorganismsȱthatȱofferȱaȱrelativelyȱsensitiveȱmeasureȱofȱ environmentalȱchangeȱandȱstress.ȱȱȱ ȱ ȱ Figureȱ1ȱȱUnamiȱCreekȱlocationȱwithinȱtheȱUpperȱPerkiomenȱCreekȱWatershedȱ(source:ȱUpperȱ PerkiomenȱCreekȱWatershedȱConservationȱPlanȱȱUPWC,ȱ2001)ȱ ȱ TheȱfindingsȱofȱthisȱAssessmentȱareȱintendedȱtoȱfurtherȱrefineȱtheȱConservationȱ PrioritiesȱestablishedȱbyȱtheȱTrustȱinȱitsȱpublication,ȱUpperȱUnamiȱCreekȱWatershed:ȱ LandscapeȱConservationȱPlanȱ(NLT,ȱ2002).ȱȱTheȱsamplingȱstationsȱareȱalsoȱintendedȱ toȱserveȱasȱaȱnetworkȱforȱlongȬtermȱvolunteerȱmonitoringȱofȱbiologicalȱconditionsȱ onȱtheȱUnamiȱCreekȱandȱitsȱtributaries,ȱasȱaȱsupplementȱtoȱdataȱcollectedȱbyȱtheȱ PennsylvaniaȱDepartmentȱofȱEnvironmentalȱProtectionȱ(PAȱDEP).ȱȱ ȱ Asȱdevelopmentȱpressuresȱandȱlandȱvaluesȱincreaseȱthroughoutȱsoutheasternȱ Pennsylvania,ȱtheȱimportanceȱofȱprioritizingȱtheȱrightȱlandȱtoȱprotectȱalsoȱ increases.ȱȱWhatȱisȱrightȱisȱbasedȱonȱseveralȱfactors:ȱ 2 UPPER UNAMI CREEK AQUATIC RESOURCE ASSESSMENT AND CONSERVATION PLAN _________________________________________________________________________________ ȱ x theȱconservationȱvaluesȱ(orȱregionalȱpublicȱbenefits)ȱofȱtheȱprogramȱarea,ȱȱ x theȱmissionȱofȱtheȱorganizationȱprotectingȱland,ȱandȱȱ x theȱprioritiesȱofȱtheȱentityȱfundingȱlandȱprotectionȱprojectsȱinȱaȱgivenȱ programȱarea.ȱȱȱ ȱ NaturalȱLandsȱTrustȱhasȱdefinedȱtheȱrightȱlandȱtoȱprotectȱinȱitsȱUpperȱUnamiȱ CreekȱWatershed:ȱLandscapeȱConservationȱPlan,ȱidentifyingȱpropertiesȱasȱlandscapeȱ conservationȱprioritiesȱbasedȱonȱtheirȱroleȱinȱprovidingȱlandscapeȬscaleȱ networksȱofȱforestȬinteriorȱhabitatȱandȱforestedȱriparianȱcorridorsȱ(NLT,ȱ2002).ȱȱ TheȱUnamiȱCreekȱisȱaȱtributaryȱofȱtheȱPerkiomenȱCreek,ȱaȱsourceȱtheȱwaterȱ supplierȱAquaȱPennsylvaniaȱdrawsȱfromȱtoȱserveȱoverȱ700,000ȱcustomersȱatȱaȱ surfaceȱintakeȱnearȱtheȱconfluenceȱwithȱtheȱSchuylkillȱRiverȱ(UpperȱPerkiomenȱ WatershedȱCoalition,ȱ2001).ȱȱToȱensureȱthatȱtheȱUnamiȱCreekȱwatershedȱ continuesȱtoȱsupportȱbiologicallyȬdiverseȱforestsȱandȱclean,ȱplentifulȱwaterȱ supplies,ȱtheȱTrustȱandȱotherȱconservationȱpartners,ȱusingȱfundsȱfromȱstateȱandȱ countyȱagencies,ȱmunicipalȱgovernments,ȱandȱprivateȱfoundations,ȱareȱworkingȱ toȱprotectȱlarge,ȱforestedȱparcelsȱandȱparcelsȱwithȱextensiveȱforestedȱstreamȱ frontage.ȱȱȱ ȱ ThisȱAssessmentȱisȱdesignedȱtoȱanswerȱanȱimportantȱquestion:ȱWhichȱforestedȱ streamfrontȱparcelsȱinȱthisȱprogramȱareaȱareȱdoingȱtheȱbestȱjobȱofȱbufferingȱandȱ filteringȱhighȱqualityȱstreamȱreachesȱ(orȱsegments)?ȱȱȱTheȱanswerȱtoȱthatȱquestionȱ isȱprovidedȱhereinȱthroughȱtheȱidentificationȱofȱtheȱhealthiestȱstreamȱreachesȱandȱ associatedȱparcelsȱofȱlandȱinȱtheȱUpperȱUnamiȱCreekȱwatershedȱasȱprioritiesȱforȱ conservation.ȱ ȱȱȱ InȱlightȱofȱrecentȱStroudȱWaterȱResearchȱCenterȱfindingsȱthatȱriparianȱforestsȱ playȱaȱcriticalȱroleȱinȱcleaningȱupȱourȱstreamsȱandȱrivers,ȱthisȱquestionȱandȱitsȱ answersȱhaveȱtakenȱonȱnewȱrelevanceȱtoȱlandȱprotectionȱprogramsȱinȱtheȱUnamiȱ andȱthroughoutȱtheȱEasternȱDeciduousȱForestȱbiome.ȱȱTheȱStroudȱstudy,ȱreportedȱ inȱtheȱProceedingsȱofȱtheȱNationalȱAcademyȱofȱSciencesȱ(Vol.ȱ101,ȱno.ȱ39),ȱ documentedȱthatȱstreamsideȱforestsȱpreventȱnonpointȱsourceȱpollutantsȱfromȱ enteringȱsmallȱstreams,ȱtheyȱalsoȱenhanceȱtheȱinȬstreamȱprocessingȱofȱbothȱ nonpointȱandȱpointȱsourceȱpollutants,ȱtherebyȱreducingȱtheirȱimpactȱonȱ downstreamȱriversȱandȱestuaries.ȱȱ(Sweeney,ȱetȱal,ȱ2004).ȱȱInȱitsȱSchuylkillȱRiverȱȱ Project,ȱStroudȱmonitoredȱbiologicalȱcommunitiesȱatȱ2ȱsitesȱinȱtheȱlowerȱreachesȱ andȱ6ȱsitesȱinȱtheȱupperȱreachesȱofȱUnamiȱCreekȱfromȱ1996ȱtoȱ2005ȱandȱfoundȱ thatȱwaterȱqualityȱwasȱfairȱbasedȱonȱanȱanalysisȱofȱbenthicȱmacroinvertebrateȱ populations,ȱwithȱoneȱsiteȱrankingȱasȱpoor.ȱȱAȱnumberȱofȱtheseȱsitesȱareȱinȱorȱ 3 UPPER UNAMI CREEK AQUATIC RESOURCE ASSESSMENT AND CONSERVATION PLAN _________________________________________________________________________________ nearȱopenȱfarmlandȱandȱdownstreamȱofȱnewlyȱdevelopingȱareas.ȱȱTheȱUnamiȱ wasȱgivenȱaȱgradeȱofȱaȱCȱbasedȱonȱcomparisonȱtoȱ19ȱotherȱstreamȱreachesȱ monitoredȱinȱtheȱSchuylkillȱbasinȱ(SWRC,ȱ2005).ȱ ȱ ThisȱAssessmentȱprovidesȱanȱoverviewȱofȱwaterȱqualityȱassessmentsȱpreviouslyȱ preparedȱforȱtheȱUnamiȱCreek,ȱoutlinesȱtheȱUnitedȱStatesȱEnvironmentalȱ ProtectionȱAgencyȱRapidȱBioassessmentȱProtocolsȱusedȱforȱdataȱcollectionȱandȱ analysis,ȱandȱsummarizesȱtheȱfindingsȱforȱ12ȱstreamȱreachesȱinȱtheȱ6ȱsubbasinsȱ sampled.ȱȱTheȱfinalȱsection,ȱentitledȱRiparianȱLandȱProtectionȱPriorities,ȱ identifiesȱandȱprioritizesȱstreamsideȱparcelsȱfoundȱtoȱcontributeȱtheȱmostȱdirectȱ filtrationȱofȱoverlandȱflow,ȱinȬstreamȱpurification,ȱandȱaquaticȱandȱriparianȱ habitatȱbenefitsȱtoȱstreamȱreachesȱwithȱhealthyȱbenthicȱmacroinvertebrateȱ communities.ȱ ȱ WithȱtheȱknowledgeȱofferedȱbyȱthisȱAssessmentȱinȱhand,ȱconservationȱpartnersȱ canȱactȱstrategicallyȱtoȱsaveȱlandȱthatȱensuresȱtheȱlandȬwaterȱlinkȱisȱmaintainedȱ forȱtheȱongoingȱbenefitȱofȱhealthyȱaquaticȱlifeȱandȱclean,ȱplentifulȱwaterȱsuppliesȱ inȱtheȱUnamiȱCreekȱwatershed.ȱ ȱ ȱ ȱ ȱ ȱ ȱ 4 UPPER UNAMI CREEK AQUATIC RESOURCE ASSESSMENT AND CONSERVATION PLAN _________________________________________________________________________________ ȱ Overview of Unami Creek Water Quality Assessments ȱ TheȱwaterȱqualityȱandȱbiologyȱofȱtheȱUnamiȱCreekȱhasȱbeenȱtheȱsubjectȱofȱ ongoingȱstudyȱsinceȱatȱleastȱtheȱ1980s,ȱwithȱstudiesȱbyȱtheȱPennsylvaniaȱ DepartmentȱofȱEnvironmentalȱProtection,ȱMarlboroughȱTownship,ȱandȱtheȱ StroudȱWaterȱResearchȱCenter.ȱȱ ȱ PAȱDEPȱImpairedȱStreamsȱAssessment/WatershedȱRestorationȱActionȱStrategyȱ TheȱPennsylvaniaȱDepartmentȱofȱEnvironmentalȱProtectionȱhasȱsurveyedȱtheȱ UnamiȱCreekȱasȱpartȱofȱitsȱevaluationȱofȱtheȱPerkiomenȱCreekȱunderȱtheȱ UnassessedȱWatersȱProgram.ȱȱȱNearlyȱtheȱentireȱUnamiȱCreekȱstreamȱnetworkȱisȱ ratedȱasȱAttainingȱwaterȱqualityȱparametersȱestablishedȱbyȱtheȱUnitedȱStatesȱ EnvironmentalȱProtectionȱAgency.ȱȱTheȱexceptionȱisȱoneȱhalfȬmileȱreachȱofȱtheȱ LickingȱCreekȱonȱtheȱLehigh/BucksȱCountyȱborderȱratedȱasȱImpairedȱdueȱtoȱ impactsȱassociatedȱwithȱagriculturalȱrunoff.ȱȱThisȱImpairedȱreachȱisȱwellȱ upstreamȱofȱtheȱnearestȱsamplingȱstationȱ(UC1)ȱestablishedȱforȱthisȱAssessment.ȱȱ ȱ PAȱDEPȱbiologistsȱrelyȱonȱdataȱcollectionȱstrategiesȱsimilarȱtoȱthoseȱusedȱforȱthisȱ Assessment,ȱevaluatingȱaquaticȱhabitatȱandȱstreamȱbiologyȱatȱmultipleȱstreamȱ sitesȱchosenȱtoȱreflectȱlandȱuseȱimpactsȱinȱeachȱsubbasin.ȱȱBiologicalȱsurveysȱ includeȱkicknetȱsamplingȱandȱidentificationȱofȱbenthicȱmacroinvertebratesȱtoȱtheȱ familyȱlevelȱinȱtheȱfield,ȱandȱevaluationȱofȱtheirȱȱpollutionȱtolerance.ȱȱHabitatȱ assessmentsȱinclude:ȱembeddednessȱofȱstreamȱsubstrate;ȱdegreeȱofȱstreambankȱ erosion;ȱconditionȱofȱriparianȱvegetation;ȱandȱamountȱofȱsedimentationȱ(PAȱDEP,ȱ 2003).ȱȱȱPAȱDEPȱassessmentsȱinȱtheȱstreamsȱofȱtheȱUpperȱUnamiȱwereȱpostponedȱ duringȱtheȱsummerȱofȱ2002ȱdueȱtoȱaȱnumberȱofȱdryȱorȱpooledȱstreambeds.ȱȱ WithinȱtheȱstudyȱareaȱforȱthisȱAssessment,ȱButterȱCreekȱwasȱdryȱandȱHazelbachȱ Creekȱwasȱpooledȱthatȱyearȱ(KimberlyȱLong,ȱpersonalȱcommunication).ȱȱȱ MarlboroughȱTownshipȱNominationȱtoȱUpgradeȱUnamiȱCreekȱtoȱExceptionalȱ Valueȱ(PAȱCode,ȱTitleȱ25,ȱChapterȱ93ȱWaterȱQualityȱStandards)ȱ Inȱ1995,ȱMarlboroughȱTownshipȱpetitionedȱtheȱEnvironmentalȱQualityȱBoardȱ (EQB)ȱforȱPennsylvaniaȱtoȱupgradeȱChapterȱ93ȱProtectedȱUseȱDesignationȱforȱtheȱ UnamiȱCreekȱfromȱColdȱWaterȱFisheryȱtoȱExceptionalȱValue.ȱȱȱTheȱEQBȱvotedȱinȱ 5 UPPER UNAMI CREEK AQUATIC RESOURCE ASSESSMENT AND CONSERVATION PLAN _________________________________________________________________________________