HomeMy WebLinkAboutCertificate of Exemption CAE_Kennewick CAE_15-000761DEPARTMENTOFCOMMUNITYANDECONOMICDEVELOPMENT—‘Renton:PLANNINGDIVISIONCERTIFICATEOFEXEMPTIONFROMCRITICALAREASREGULATIONSEVALUATIONFORM&DECISIONDATE:November03,2015PROJECTNUMBER:LUA15-000761PROJECTNAME:2816KennewickStreamandBufferEnhancementPROJECTMANAGER:KrisSorensen,AssociatePlannerAPPLICANT:AlyssaIran18364160thP1SERenton,WA98058CONTACT:KateKnoxMachata,7KEnvironmental4062NE87thStSeattle,WA98115LOCATION:2816KENNEWICKPLNEDESCRIPTION:TheapplicantisrequestingaCriticalAreasExemptionforSEPAexemptactivitiesforenhancementofastreambufferat2816KennewickP1NE(PID334210-3365).ThesubjectsiteiswithintheResidential8(R-8)zone.AnunnamedcreekandatributaryofMayCreekrunsthroughtherearyardofthesingle-familyresidentialsite,inanopenchannel,andentersaculvertatthenortheastcornerofthesitewherethecreekthencontinuesunderNE29thSt.ThecreekwasclassifiedasaClass4streamwhenthenewhomewasconstructedin2012andwhenworkinthestreamandbufferwereconductedwithoutrequiredCityapprovals.TheproposedplantmixinthebufferconsistsofTallOregonGrape,RedFloweringCurrent,OceanSpray,Swordfern,andWildStrawberry.Thebufferareaonthebothsidesofthecreekisapproximately1,300squarefeet.ThesiteislocatedwithintheWellheadProtectionAreaZone2.Smallslopesbetween15and25percentarelocatednearthecreekareaonthesite.AstreamstudyandmitigationplanoftherestorationproposalwassubmittedbyaProfessionalWetlandScientist,KateKnoxMachataof7kEnvironmentaldatedAugust31,2015(revisedSeptember17,2015).Thisstudyconcludesthatanincreaseinecosystemfunctionisanticipatedwiththeimplementationofthisrestorationplan.CRITICALAREA:Class4UnnamedStreamandStreamBufferEXEMPTIONJUSTIFICATION:RentonCriticalAreasRegulations,RMC4-3-050C.5.a.iii“ExemptActivities-PermittedwithinCriticalAreasandAssociatedBuffers”iii.ApprovedRestoration/MitigationactivitiesPage1of4
CityofRentonDeportmentofCommunity&EconomicDevelopmentCertificateofExemptionfromCriticolAreasRegulotions2816KennewickStreamandBufferEnhancementLUA15-000761approvedbytheCity.FINDINGS:TheproposeddevelopmentisconsistentwiththefollowingfindingspursuanttoRMCsection4-3-OSOC.5:1.TheactivityisnotprohibitedbythisoranyotherchapteroftheRMCorstateorfederallaworregulation.2.TheactivitywillbeconductedusingbestmanagementpracticesasspecifiedbyindustrystandardsorapplicableFederalagenciesorscientificprinciplesifsubmittedplansarefollowedandtheconditionsofapprovalofthisexemptionaremet.3.Impactswillbeminimizedanddisturbedareaswillbeimmediatelyrestored,ifsubmittedplansarefollowedandtheconditionsofapprovalofthisexemptionaremet.4.Wherewetlandorbufferdisturbanceoccursduringconstructionorotheractivitiesinaccordancewiththisexemption,thesitewillberevegetatedwithnativevegetationasrequiredasaconditionofapprovalforthisexemption.DECISION:AnexemptionfromtheCriticalAreasRegulationsisherebyApprovedwithConditions*.Page2of4
CityofRentonDeportmentofCommunity&EconomicDevelopmentCertificateofExemptionfromCriticolAreosRegulations2816KennewickStreamandBufferEnhancementLUA15000761CONDITIONS:1.ThebankarmoringtoberemovedasidentifiedontheapprovedplantingplarisnotapprovedthroughthisCriticalAreasExemption.AseparateexemptionandEnvironmental(SEPA)Reviewprocessisrequiredforthebankarmoringremovalproposal.ThisseparatepermitshallbesubmittedtotheCitywithin180days(or6months)ofthispermitapproval.2.Theapplicantshallprovideamonitoringreportone-yearfollowingtheinstallationoftheapprovedstreambufferplantings,toCurrentPlanningProjectManager,KrisSorensen,forreviewandapproval.a.Themonitoringreportshallbepreparedbyabiologistorstreamspecialistwithananalysisoftheapprovedmitigation/enhancementplan,thenumbersandtypesofplantsplanted,survivaloftheplants,andrecommendationforreplacingofplantsiftheyaredead,decaying,ornotsuitedforthesite.b.Thebiologistorstreamspecialistshallprovidearecommendedplantingplanforanyplantsthatneedtobereplaced.c.TheapplicantshallinstalltheplantsrecommendedtobereplantedbythespecialistoncetheCurrentPlanningProlectManagerhasreviewedandapprovedtheone-yearmonitoringplan.3.Nomechanicalequipmentshallbeusedtoinstallthemitigation/enhancementplantingswithinstreambufferareas.4.TheapplicantshallcontactCurrentPlanningProjectManager,KrisSorensen,425-430-6593,followinginstallationoftheapprovedmitigation/enhancementplanforinspectionandfinalapproval.5.Nocuffingormaintenanceofgrassesorothernativevegetationshallbeallowedwithinthestreambufferareaunlesssuchmaintenanceisrequiredfortheestablishmentperiodoftheapprovedstreambuffermitigation/enhancementplan.Maintenanceofinvasiveplantsmaybeallowedprovideditisconsistentwiththeapprovedplantingplan,foraperiodof5yearsafterwhichanewCriticalAreasExemptionwouldberequired.SIGNATURE&DATEOFDECISION:November03,2015JenniferHenning,PlanningDirectorDateTheabovelandusedecisionwillbecomefinalifthedecisionisnotappealedwithinthe14-dayappealperiod(RCW43.21.C.075f3);WAC197-11-680).Page3of4
CityofRentonDeportmentofCommunity&EconomicDevelopmentCertificoteofExemptionfromCriticolAreosRegulotion52816KennewickStreamandBufferEnhancementLUA15-000761APPEALS:AnappealofthisadministrativelandusedecisionmustbefiledinwritingtogetherwiththerequiredfeetotheCityofRentonHearingExaminer,CityofRenton,1055SouthGradyWay,Renton,WA98057,onorbefore5:00p.m.,onNovember17,2015.RMC4-8-110governsappealstotheHearingExaminerandadditionalinformationregardingtheappealprocessmaybeobtainedfromtheRentonCityClerk’sOffice,(425)430-6510.RECONSIDERATION:Within14daysofthedecisiondate,anypartymayrequestthatthedecisionbereopenedbytheapprovalbody.Theapprovalbodymaymodifyhisdecisionifmaterialevidencenotreadilydiscoverablepriortotheoriginaldecisionisfoundorifhefindstherewasmisrepresentationoffact.Afterreviewofthereconsiderationrequest,iftheapprovalbodyfindssufficientevidencetoamendtheoriginaldecision,therewillbenofurtherextensionoftheappealperiod.Anypersonwishingtotakefurtheractionmustfileaformalappealwithinthe14-dayappealtimeframe.EXPIRATION:Five(5)yearsfromthedateofdecision(datesigned).Attachments:StreamStudyandPlantingPlanPage4of4
THATPORTIONOFTHESW1/4,SE1/4,SECTION32TOWNSHIP24NORTH,RANGE05EAST,W.MLY&TRANRESIDENCELEGALDESCRIPTION:HILLMANSLAKEGARDENOFEDEN#1PARTOFLOT51VOL.11,PG.63i//i,2816KENNEWICKPLNERENTONWA98056TallOregonGrapeat3-4footspacingParcelNumber:334210-3365BankArmoringtoberemovede/1’Ybt’‘__
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‘:i1KateKnoxMachata,-7KEnvironmental4062NE87thSeattle,WA98115KrisSorensen‘PlanningDivision,Community&EconomicDevelopmentCityofRenton1055SouthGradyWayRenton,WA98057August31,2015(RevisedSeptember17,2015)RE:BufferEnhancementPermitApplicationforAlyssaandTonyTran(Parcelnumber334210-3365)DearMr.Sorensen:Withthisletterreport,wearerequestingcriticalareasexemptionfromtheCityofRentonforproposedbufferenhancementworkinparcel334210-3365.AdditionalmaterialsareattachedtomeetpermitsubmittalrequirementsasindicatedontheExemptionfromCriticalAreasRegulationschecklist.ProjectIntroductionInAugust2015,7KEnvironmentalwascontractedtoassistAlyssaandTonyTranwithpermitpreparationforbufferenhancementplantingswhichwillalsoprovidevisualprivacyfromadjacentpropertiesandhelptolimittrespassinthestreambufferadjacenttotheirhome.Thisreporthasbeenpreparedtodescribeexistingconditionsonthesite,discussexistingecologicalfunctionsinthestreambuffer,andprovidedetailsoftheproposedstreamandbufferenhancementactivitiesalongtheunnamedstreamthatcrossestheirproperty.ThisletterreportisdesignedtoserveastheStandardStreamStudyandBiologicalAssessmentperRentonMunicipalCode(RMC)4-8-120D.ProjectSiteDescriptionandLandscapePositionTheTranproperty(Parcelnumber334210-3365)islocatedat2816KennewickPlaceNEintheCityofRenton(seeFigure1providedbyCityofKent).Thisparcelliesapproximately600feeteastof1-405inthedevelopedurbanneighborhoodofKennydale.Asmall,unnamedtributaryofMayCreek(SeeFigure2)withanaverageordinaryhighwater(OHW)widthof2feetliesnearthenorthernedgeoftheTran
Page2property.NowetlandswereobservedonthepropertyoradjacenttothepropertyboundaryasfaraswasvisiblefromtheTranproperty.Theunnamedtributaryhasasmallwatershed(estimatedtobeabout40acresinsize)upstreamfromthesubjectparcel.Approximately80feetupstreamfromtheparcel,thestreamisimpoundedbya2-3foothighconcretedam.A24-inchdiameterCMPculvertcarrieswaterwestunderNE29thStreet.Thestreamconveyswaterapproximately700feetnorthandwesttoitsconfluencewithMayCreekwhichjoinsLakeWashingtonapproximatelyonemilefurthernorthandwest.MayCreekisknowntobeafishbearingstreamwithdocumentedpresencewithpossiblespawningforfallChinookandcohosalmonandwinterrunsteelhead.NofishpresencehasbeennotedintheunnamedtributaryontheTranproperty(SalmonScape2015).SiteHistoryTheTran’spurchasedthesubjectparcelin2011.Theexistingdilapidatedstructurewasdemolishedin2012,andsitegradingwascompletedtoallowforconstructionofanewresidenceunderthenewsinglefamilyresidencecombinationpermitnumberCP12039.Existingusesinthevicinityofthechannelpriorthenewconstruction(SeeFigure2)includedahomewithlandscapedyardincludingaswimmingpool,fence,androckterraceretainingwallwhichparalleledthechannel,approximately15feettothesouth.RegulatoryFrameworkTheregulatoryframeworkforworkalongthestreamandinitsbuffermustconsiderfederal,stateandlocalleveljurisdiction.FederalJurisdictionAsatributaryofMayCreekwhichflowstoLakeWashington,theunnamedtributarytoMayCreekontheTranpropertyisconsideredaWateroftheUnitedStates,andthuswillberegulatedunderSection404oftheCleanWaterAct.TheU.S.ArmyCorpsofEngineers(ACOE)regulatesworkbelowOrdinaryHighWater(OHW).FederalpermitsmayberequiredforanyworkthatoccursbelowOHW.TheACOENationwidepermit18allowsforminordischargesasfollows:1$.MinorDischarges.MinordischargesofdredgedorfillmaterialintoallwatersoftheUnitedStates,providedtheactivitymeetsallofthefollowingcriteria:(a)Thequantityofdischargedmaterialandthevolumeofareaexcavateddonotexceed25cubicyardsbelowtheplaneoftheordinaryhighwatermarkorthehightideline;(b)Thedischargewillnotcausethelossofmorethan1/10-acreofwatersoftheUnitedStates;and(c)Thedischargeisnotplacedforthepurposeofastreamdiversion.Notification:Thepermitteemustsubmitapre-constructionnotificationtothedistrictengineerpriortocommencingtheactivityif:(1)Thedischargeorthevolumeofareaexcavatedexceeds10cubicyardsbelowtheplaneoftheordinaryhighwatermarlforthehightideline,or(2)thedischargeisinaspecialaquaticsite,includingwetlands.(Seegeneralcondition31.)(Sections10and404).
Page3Ifanyworkinthechannelisproposedandislimitedtostreambankstabilizationandhasdischargebelow10cubicyardsanddoesnotresultinstreamdiversion,noACCEpre-constructionnotificationshouldbeneeded.StateJurisdictionTheWashingtonStateDepartmentofEcologyregulateswaterqualityunderSection4OloftheCleanWaterAct.litheprojectimpactsarelessthan(temporaryorpermanentimpacts)‘/2acreofwetland,noindividual401reviewisrequired.AnHydraulicProjectApproval(HPA)wouldberequiredforanyworkbelowOHW.MostconstructionprojectsoractivitiesinornearstatewatersarerequiredtoobtainanHPAfromWashingtonDepartmentofFishandWildlife(WDFW)whichisdesignedtoensureprojectsmeetstateconservationstandardstoprotectfishlife.LarryFisheristheregionalwildlifebiologist.AnHPAapplicationcanbecompletedbyfillingouttheonlineapplicationformlocatedatthewebsiteaddressLocalJurisdiction:CityofRentonLocalcodeprovidesforprotectionofcriticalareasincludingstreamsandtheirbuffers.Basedoncurrent2015codeguidance,theunnamedtributarycrossingtheIranpropertyisaCityofRentonStreamClass4(SeeFigure3).Class4streamshavebufferuserestrictionsforastandardwidthof35feet.Perthecode,thesebufferwidthsassumedegradedbufferswithnoenhancement.Codeallowsthatnarrowerbuffersmaybepermittedunderrestoredorimprovedbuffersthatrestoreandprotectriparianfunctions.Thisparcelhadapreviouslegalalterationthatoccurredwithinthebufferdecadesagointheformofaretainingwallandfence.ExistingConditionsThestreamanditsbufferatthispropertyexhibitcharacteristicsofaheavilyurbanizeditsriparianenvironment(seePhotographs1-3).ThestreamliesatthenorthernedgeoftheTranproperty.TheTranpropertyboundaryextendsaminimumof5feetanduptoapproximately13feetnorthofthestream.Adjacentlanduseontheparceltothenorthofthechannelisaresidencewithfencedyard.Alineofwesternredcedartreesparallelsthepropertyline.Vegetationintheherbandshrublayeronthenorthsideofthestreamissparseduetothedensecanopycoverformedbythelineofcedartrees(seePhotographi).ManylowerbranchesofthecedarswereclearedbytheneighborinlateJulyorearlyAugust2015whichhasopeneduptheunderstorytosomeextentalongthewesternedgeoftheproperties.Vegetationonthesouthbankofthestreamiscurrentlymaintainedlawnuptoarockterracewhicheffectivelystabilizestheslopeleadinguptothehome.Thestreambedliesinswalethatisapproximately6-8feetlowerthansurroundingtopography.Atopographicmapshowing2footcontoursinthevicinityofthispropertyisprovidedinFigure4.Thestreamisapproximately2feetwideatOHWalongthelengthofthechannelontheTranproperty(approximately80linearfeet).Alongmuchofthestream,thebankswerestabilizedwithreusedconcreteriprapthatappearstohavebeenplacedatleastseveraldecadesago.Hollowconcreteblockswereplacedmorerecentlyalong27linearfeetofthenorthernbankofthechannel.Theblockisproposedtoberemovedandbankswillbestabilizedwithrushesand/orsedges.Thestreambedsubstrateiscomposedofamixofsandandgravelwithsomesilt.Someofthegravel-sizedmaterialis
Page4chunksofangularbrokenconcrete.Flowsareregulatedbyadamonprivatepropertythatisabout100feetupstreamfromtheTranproperty.AculvertatthewestedgeofthepropertyconveyswaterunderNE29thStreetandofftheproperty.ExistingStreamBufferFunctionsIntactriparianbuffersprovideimportantecologicalfunctionsthatcanbedescribedassupportingHydrology,Biogeochemistry,PlantCommunityandHabitat/FaunalSupportsystems(followingBrinsoneta!.1993,Brinsoneta!.1995,andACKindig2003.).Riparianbuffersinanurbanenvironmentarecommonlydegradedfromdecadesofhumanencroachmentandprovideecologicalfunctionstovaryingdegrees.Hydrologyfunctionsprovidedbyriparianbuffersmayincludemaintenanceofwaterqualitytodownstreamwatersincludingstreamtemperatureregulation,andregulationofwaterquantityfromdelayingorretainingprecipitationandstormwaterrunoff.Biogeochemistryfunctionsprovidedbyurbanriparianbuffersmayincluderegulationofsedimentandnutrientinputstodownstreamwaterwaysthroughstreambankstabilizationandfiltrationofrunofffromupgradientsystems.Riparianbuffersmaysupportdiversenativeand/ornon-nativeplantcommunities.Theseplantcommunitiesmayprovidelimitedhabitatopportunitiesforaquaticspecies,smallbirdsormammals,andbeneficialinsectswithlifehistorystrategiesthatallowsurvivalinnarrowcorridorswithintheurbanenvironment.Inthisurbancorridor,theprimarygoalsforprotectingandenhancingriparianbuffersaretosupportcleanerwater,streamtemperatureregulation,streambankstabilization,andtoalimiteddegreeprovideimprovedhabitatforaquaticspeciesandwildlifethatcansurviveintheurbanenvironment.EcologicalfunctionsprovidedbytheriparianbufferalongtheunnamedtributarytoMayCreekaredescribedunderexistingconditionsinthesectionsbelow.Thenextsectiondescribestheproposedbufferrestorationandenhancementactivitiesandassessespotentialforimprovementinecologicalfunctionsthatmayresultfromthiswork.HydrologyFunctionsUnderexistingconditions,thestreamanditsbufferprovideminimaltonohydrologyfunctionswithenhancewaterqualityorregulatingstormwaterrunoff.Treecanopycoveroccursonlyonthenorthernbankofthechannel.Thechannelisrecessedwithintheshallowravineandispartiallyshadedbythesetreesduringmid-summer.Thesetreesalsointerceptsomeprecipitationtohelpreducestormrunoffenteringthestream.Thechannelbanksarenearlyverticalwithriprapliningmuchofthechannelonbothsides.Sedimenttransportmayoccurtothestreamfrombaresoilbelowthecedarcanopy.Intactlawngrassonthesouthernbankreducespotentialfortransportofsedimenttothestreamfromerosion.Theexistingretainingwallsupslopefromthestreamreduceprecipitationrunofffromtheupslopeurbanenvironment.BlogeochemistryFunctionsUnderexistingconditions,thestreamanditsbufferprovidelowtomoderatebiogeochemistryfunctioning.Thereisminimalvegetationincontactwiththestreamduringnormalflowsduetoriprapalongsteepchannelbanks.Theplantcommunityismaintainedlawntothesouthandbareherblayeronthenorthandthusthereisminimalpotentialfornutrientuptakeandtransformationsintheriparianbuffer.
Page5PlantCommunityFunctionsThecedartreesparallelingthepropertylineareanativetreespecies.Therestoftheriparianbufferisdominatedbynon-native,predominantlyherbaceousspeciesincludingweeds,lawngrasses,andhorticulturalplants.Thenorthernbankhasonlysparsevegetationintheunderstory.Underexistingconditions,thestreamanditsbufferprovidelowtomoderateplantcommunityfunctions.Thecedartreecanopytothenorthofthestreamprovidesaslightpotentialforinsectandlitterfallinputtothecreekthatcouldsupportdownstreamaquaticfoodwebcycling.FaunalSupport/HabitatFunctionsMinimaltononativefaunalsupportorhabitatfunctionsareprovidedwithinthestreamoritsriparianbufferunderitsexistingconditions.Nofishareknowntooccurwithinthissmall,2-footwide,unnamedtributary.Thereislittlehabitatstructurewithinthechannelduetothestraight,ripraplinedbank.Thesparseunderstoryplantcommunityandadjacentdevelopedareaslimitpotentialspeciesthatcouldutilizethishabitat.However,ducksanddeerhavebeenseeninthisripariancorridor(A.Iran,Pers.Comm.2015).ProposedProjectPlantingPlanTheproposedplantingplanisprovidedinFigure5.Arowofnativeplantswillbeinstalledalongthenorthpropertyboundarytoprovidedualfunctionofdesignedvisualprivacyandlimitingtrespassandrestoringnativeplantcommunityfunctions.TherowoftallOregongrape(Mahoniaaquifolium)willbeplantedat3-footspacinginarowthatparallelsthepropertyboundaryandsouthoftherowofcedartreesperFigure5.Theproposedplantingareaoccupiesapproximately110squarefeetinthestreambuffer.RemovalofConcreteBlockApproximately27linearfeetofverticalconcreteblockwillberemovedfromthenorthbankofthechannel.Thisstreambankinthisareawillberestoredtosoftbanksandstabilizedwithnativerushes(Juncuseffusus,Juncusacuminatus)and/ornativesedges(Carexutriculata,Carexlenticularisvar.lipocarpa).ConstructionSedimentandErosionControlMeasuresConstructionbestmanagementpracticeswillbeusedduringplantinstallationtopreventdischargeofsedimenttothestream.Mulchwillbeappliedatthebaseeachshrubasneeded.Fertilizersshouldnotbeusedgivenproximitytothestream.In-streamworktoremovethebankarmoringblockwillbedoneusingworkareaisolationtominimizesedimentdisturbance.AtypicalforworkareaisolationisshowninFigure6.
Page6AnalysisofProjectEffectsThescaleoftheproposedplantingprojectisverysmallandthuspotentialliftforecosystemfunctionsislimited.Theproposedprojectwillprovideminor,incrementalpositiveimpacttoecosystemfunctioningintheriparianbuffer.HydrologyFunctionsIncreasingshrubcanopycoverintheriparianbufferwillprovideincrementalbenefitstoregulationofstreamtemperaturesalongthis80footlongreachofthestream.However,astheproposedplantingisonthenorthsideofthechannel,minimaladditionalshadingwillbeprovided.Someoftheshrubsmayoverhangthechannelastheygrowlarger.Additionalvegetationanddevelopmentofshrubandherbcanopylayersbelowthetreelayerwillinterceptadditionalprecipitationduringstormevents.Removaloftheconcreteblockandrestorationofherbaceousvegetationonthestreambankmayprovideminorreductioninstreamvelocitytodelaystormwaterrelativetocurrentconditionwiththeconcreteblock.Theproposedprojectwillresultinminorandincrementalincreaseinhydrologyfunctionsinthestreamanditsbuffer.BiogeochemistryFunctionsIncreasingplantcoveranddiversifyingtheplantcommunitythroughouttheriparianbufferwillincrementallyimprovebiogeochemicalcyclingopportunitiesinthisshortreachalongthestream.Restoringthechannelbanktosoilwithnativeherbaceousvegetationforbankstabilizationwillprovideminoropportunityfornutrientretentionalongthechannel.Duetothesmallareaandsinglenativeshrubspeciesproposed,minimalchangestobiogeochemicalfunctioninginthebufferwillberealizedfromtheproposedproject.PlantCommunityFunctionsTheproposedprojectwillincrementallyincreasethenativeplantdiversitywithinaportionofthebufferbydevelopinganunderstoryshrubcanopycoverbelowthecedartrees.Thisshrubcanopycovermayprovidegreatershadecoveroverthestreamthatcouldhelptoregulatestreamtemperatures.Installingtherowofnativeplantsinthebufferisdesignedtolimithumanaccesstothestreamandareaimmediatelyadjacenttothestream.Theproposedprojectwillhaveaminorandincrementalincreaseinplantcommunityfunctionsinthestreambuffer.FaunalSupport/HabitatFunctionsAlthoughonlyaverysmallincrementalincreaseinnativeplantdiversityisproposed,increaseddiversityinnativeplantcommunitywillincrementallyincreasetheopportunitiesforforagingbirdsandbeneficialinsects.Therearelimitedopportunitiesforimprovingfaunalsupportfunctionsduetotheheavilyurbanenvironmentinthesurroundinglandscape.Duetothescaleofthisprojecttherewillbelittletonochangeinfaunalsupport/habitatfunctionsduetotheproposedplantingproject.RecommendedProjectConditions•Nopesticidesorfertilizersshallbeusednorthofthefenceorrockretainingwall.Grassnorthoftherockwallshouldbelefttogrowandshouldnotbemowed.
Page7.Ifshrubsdie,replantinplacewiththesamespeciesoralternatenativespeciesfromthelistinAppendixA.ConclusionsInconclusion,theproposedprojectincludesplantingshrubsandherbsalongapproximately80linearfeetofriparianbufferforanunnamedtributaryofMayCreek.Approximately20nativeshrubs[tallOregongrape(Mahoniaaquifolium)Jwillbeinstalledintheriparianbuffercoveringapproximately110squarefeet.Bankarmoringwillberemovedfromasectionofthestream.Sedimentanderosioncontrolmeasuresareproposedtoprotectwaterqualityinthestreamduringtheinstallationandestablishmentperiod.Theproposedprojectwillprovideminorincrementalliftinecosystemfunctionsalongthisshortreachofstream.Wearehappytodiscusstheproposedprojectinfurtherdetail.PleasecontactthehomeownerAlyssaTranat206-307-1874and/orKateKnoxMachataat206-683-7229orviaemailat.kat.kngniLcomifadditionalinformationisneeded.Sincerely,/—KateKnoxMachata,MS.ProfessionalWetlandScientist#21047KEnvironmental
Page$ReferencesACKindig&CompanyandCedarockConsultants.2003.CityofRentonBestAvailableScienceLiteratureReviewandStreamBufferRecommendations.PreparedfortheCityofRentondatedFebruary27,2003.Brinson,MM.1993.Ahydrogeomorphicclassificationforwetlands.WetlandsResearchProgramTechnicalReportWRP-DE-4.WaterwaysExperimentStation,U.S.ArmyCorpsofEngineers,Vicksburg,MS.Brinson,M.M.,Hauer,F.R.,Lee,L.C.,Nutter,W.L.,Rheinhardt,R.D.,Smith,R.D.,andWhigham,D.(1995).‘Aguidebookforapplicationofhydrogeomorphicassessmentstoriverinewetlands,”TechnicalReportWRP-DE-11,U.S.ArmyEngineerWaterwaysExperimentStation,Vicksburg,MS.NTISNo.ADA308365.FederalRegister.2012.NationwidePermits,Conditions,FurtherInformation,andDefinitions.Vol.77,No.34IssuedTuesday,February21,2012.KingCountyMAP.2015.Accessedonlineat:
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THAIPORTIONOFTHESW1/4,SE1/4,SECTION32TOWNSHIP24NORTH,RANGE05EAST,WM,LY&TRANRESIDENCELEGALDESCRIPTION:HILLMANSLAKEGARDENOFEDEN#1PARTOFLOT51VOL.11,P0.63CCRONES&MSY6NOT/2816KENNEWICKPLNERENTONWA98056ParcelNumber:334210-3365BankArmoringtoberemovedTaMOregonGrape87.61’APPX.i5’¶STREAM4’.t/I/I7’ROCTE-17’3(Thesedimensionsareappx.measurementsonLandSurvey.)39’CI)-c0)LUz/Cr)11/RESIDENCEAREA/III82.90’KENNEWICKPLNEFigure5.ProposedProjectSiteplanSIDEWALI“
Page13Figure6.Typicalforworkareaisolationofthenorthstreambankduringremovalofconcreteblocktoprotectwaterquality.Figurefromhttp://www.catchmentsandcreeks.com.au/docs/IB-1.pdf
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a;Ti4:Page15Photograph2.Lookingeasttowarddamonneighbor’spropertyinthebackground.a\:.‘i••:aPhotograph3.Lookingnortheasttowardneighboringpropertyandfencebeyondlineofcedartrees.Concreteripraphasbeeninplacealongmostofthestreamforseveraldecadesormore.
Page16AppendixAAdditionalNativeshrubspeciesthatmaybeinstalledifreplantingisrequiredinthefutureinclude:ShrubsAcercircinotum(vinemaple)Coryluscornuta(Hazelnut)Holodiscusdiscolor(Oceanspray)Lonicerainvolucrota(Blacktwinberry)Mohoniaoquifolium(TallOregongrape)Rhododendronmacrophyllum(Pacificrhododendron)Rthessanguineum(Redfloweringcurrant)Rosapisocorpa(Clusteredwildrose)Rosagymnocarpa(Baldhiprose)Rubusspectabilis(Salmonberry)Cornussericea(Redtwigdogwood)Rubusparviflorus(Thimbleberry)Vacciniumovatum(Evergreenhuckleberry)LowshrubsGaultheriashallon(Salal)Arctostaphylosuva-ursi(BearberryorKinnickinnick)UnderstoryherbaceousspeciesPolystichummunitum(swordfern)Eragariavirginiona(wildstrawberry)StreambankplantingherbaceousspeciesJuncuseffususJuncusacuminatusCarexutriculataCarexlenticularisvar.lipocarpa