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Home My WebLink About3871-TIR-EncompassñCNGINEERING&SURVCYINGIC—TECHNICALINFORMATIONREPORTforCampbellShortPlatSeptember4,2015?.SLII‘t9:vj5i2-P(Of5€./e’çi’z_fZ-IISPreparedForPacificPeakConstruction4004NEl9StreetRcnton,WA98056WesternWashingtonDivision165NEJuniperSt.,StePhone:(425)392-0250EasternWashingtonDivision407SwiftwaterBIvd,CleElum,WA98922Phone:(509)674-7433Fax:(509)674-7419EncompassEngineeringJobNo.15517201,lssaquah,WA98027Fax:(425)391-3055WWW.EncompassESnet TABLEOFCONTENTSSECTION1:PROJECTOVERVIEWSECTIONLI:CONDITIONSANDREQUIREMENTSSUMMARY—N/ASECTIONIII:OFF-SITEANALYSISSECTIONLV:FLOWCONTROLANDWATERQUALITYFACILITYANALYSISANDDESIGNSECTIONV:CONVEYANCESYSTEMANALYSISANDDESIGN—N/ASECTIONVI:SPECIALREPORTSANDSTUDIESSECTIONVII:OTHERPERMITS—NASECTIONVIII:ESCANALYSISANDDESIGNSECTIONIX:BONDQUANTITIES,FACILITYSUMMARIES,ANDDECLARATIONOFCOVENANT—N/ASECTIONX:OPERATIONSANDMAINTENANCEMANUAL—N/A SECTION1PROJECTOVERVIEW SiteAddress:xxxAnacortesAvenueN.E.,RentonWA,98059KingCountyTaxParcel:102305-9095ProjectOverviewThisprojectinvolvesthedevelopmentofavacant1.92acreparcelintotwosingle-familylotsinzoningR-8.Theparcelisvacantanditismostlycoveredwithheavyvegetationwithsignificanttrees.Thesitegenerallyslopesdowntosouthwestatapproximately10%tPertheSCSSoilmaps,thesiteisunderlainwithAlderwood,gravellysandyloam(AgC).ThisisconfirmedintheattachedGeotechnicalEvaluationpreparedbyGeospectrumConsultantsInc.ThesouthwestoftheparceliscoveredwithwetlandcategoryII.-Seeattachedreports.DownstreamDrainageMajorityoftheexistingrunoffsheetflowssouthwesttowardstheon-siteexistingwetland.AnalysishasbeendoneandisincludedinSection3ofthisreport.Therehavebeennoproblemsidentifiedwithinthedownstreamdrainagesystem.WLRDDrainageComplaintsTherearenorelevantcomplaintsinthedirectvicinityoftheproject.RefertotheLevelIDrainageAnalysisincludedinSection3ofthisreport. 2009KCSWUMCoreRequirementsSection1.2.1CoreRequirement#1:Dischargeatthenaturallocation•Theperviousportionsofthedevelopedsitewillcontinuetosheetflowsouthwesttowardsthenaturaldischargearea—theon-sitewetland.ThenewimpervioussurfaceswilldraintobasicdispersionBMPstowardsthenaturaldischargearea—theonsitewetlandSection1.2.2CoreRequirement#2:OffsiteAnalysis•AnoffsitedrainageanalysisisprovidedinthisPreliminaryTIR.Section1.2.3CoreRequirement#3:FlowControl•Thedevelopmentofthisprojectwillresultinlessthan0.1CFSincreaseofthe100-yearrunoff,therefore,detentionisnotrequired.Acombinationoffullandbasicdispersionwillbeused,dischargingtowardstheonsitewetland.Section1.2.4CoreRequirement#4:ConveyanceSystem•Becausetheonlypipesotherthanadirectreplacementofanexisting12”pipeinthepublicRJWIsaprivate6”pipeconveyingflowsfromasinglelotanddriveway,conveyancecalculationsarenotneeded.Section1.2.5CoreRequirement#5:ErosionandSedimentControl•AtemporaryerosioncontrolplanwillprovideBMPstobeimplementedduringconstruction.Section1.2.6(‘oreRequirement#6:MaintenanceandOperations•AmaintenanceandoperationsmanualwillbeprovidedinthefinalTIRSection1.2.7CoreRequirement#7:FinancialGuaranteesandLiability•ThedeveloperwillarrangeforanyfinancialguaranteesandliabilitiesrequiredSection1.2.8CoreRequirement#8:WaterQuality•Therewillbelessthan5,000sq-ftofnewPOISsowaterqualitymeasuresarenotneeded.2009KCSWUMSpecialRequirementsSection1.3.1SpecialRequirement#1:OtherAdoptedArea-Specj/icRequirements‘N/ASection1.3.2SpecialRequirement#2:Floodplain/FloodwayDelineation•N/AtherearenoFEMAfloodplainslfloodwaysintheareaSection1.3.3SpecialRequirement#3:FloodProtectionFacilities‘N/ASection1.3.4SpecialRequirement#4:SourceControl•Sourcecontrolisnotrequiredforthisproject.Section1.3.5SpecialRequirement#5:OilControl•N/AOilcontrolisnotrequiredforthisproject.Section1.3.6SpecialRequirement#6:AquiferProtectionAreaThedevelopmentisinZone2oftheAPA.Therearenoproposedopenstormfacilitiesorconveyance,sonomeasuresforprotectionarerequired. mi‘C—II VicinityMap SHEETNO.11180000FEETt1l1MA?51itKINGCOUNTYAREA,WASHINGTON(RENTONQUADRANGLE)IOfl7(VF1680000FEETIop47305027’30” SECTION2CONDITIONSANDREQUIREMENTSSUMMARY DenisLawMayor_ _ _iJune26,2015Community&EconomicDevelopmentDepartmentCE”Chip”Vincent,AdministratorTomReddingEncompassEngineering&Surveying165JuniperStIssaquah,WA98027SUBJECT:ENVIRONMENTAL(SEPA)THRESHOLDDETERMINATIONCampbellShortPIat,15-000239,ECF,SHPL-ADearMr.Redding:ThisletteriswrittenonbehalfoftheEnvironmentalReviewCommittee(ERC)toadviseyouthattheyhavecompletedtheirreviewofthesubjectprojectandhaveissuedathresholdDeterminationofNon-Significance.PleaserefertotheenclosedERCReport,formoreinformation.Appealsoftheenvironmentaldeterminationmustbefiledinwritingonorbefore5:00p.m.onJuly10,2015,togetherwiththerequiredfeewith:HearingExaminer,CityofRenton,1055SouthGradyWay,Renton,WA98057.AppealstotheExamineraregovernedbyRMC4-8-110andinformationregardingtheappealprocessmaybeobtainedfromtheCityClerk’sOffice,(425)430-6510.IftheEnvironmentalDeterminationisappealed,apublichearingdatewillbesetandallpartiesnotified.Ifyouhaveanyfurtherquestions,pleasecallmeat(425)430-7289.FortheEnvironmentalReviewCommittee,ClarkH.CloseAssociatePlannerEnclosurecc:RentonchurchoftheNazarene/Owner(s)PeterSt.Pierre,ForestContracting/ApplicantStephenChow,losifMlshkov/Party(Ies)ofRecordRentonCityHall•1055SouthGradyWay.Renton,Washington9S057.rentonwa.gov DEPARTMENTOFCOMMUNITYANDECONOMICDEVELOPMENTSENVIRONMENTALREVIEWCOMMITTEEREPORTANDADMINISTRATIVESHORTPLATREPORT&DECISIONERCMEETINGDATE:June22,2015ProjectName:CampbellShortPlatProjectNumber:LUA15.000239,ECF,SHPI.-AProjectManager:ClarkH.Close,AssociatePlannerOwnerRentonChurchoftheNazarene,PCBox264D,RentonWA98056ApplicantPeterSt.Pierre,ForestContractingLLC,27018233wPtSE,MapleValley,WA98038Contact:TomRedding,EncompassEngineering&Surveying,165NEJuniperSt.,Suite201Issaquab,WA98027ProjectLocation:SWCorneroftheintersectionofNE9StandAnacortesAveNE(APN1023059095)ProjectSummary:Theapplicantisrequestingapprovalofa2-lotshortplatofavacant1.92-acreparcelforthefuturedevelopmentof2single-familyhomes.ThesiteislocatedwithintheResidential-Sdwellingunitsperacre(R-8)zone.Theproposedlotsrangeinsizefrom7,912SFto13,445SFinareawithanaveragelotsizeof10,679SF.Thesitecontainsa57,434SFcriticalareatract(TractA)andwouldincludea1,807SFshareddriveway(TractB).Theresidentialdensityis4.08dwellingunitspernetacre.AccesstothesiteisviaasingleshareddrivewayfromNE9thSt.Half-streetfrontageimprovementswillbecompletedalongNE9thSt.Thesiteincludesa26,107SFonsitecriticalarea(Category2wetland),inthesouthwesterlyportionoftheproperty,requiringa50-footbuffer.Thereare172treesonsite.Theapplicantisproposingtoretain142treeswithinthecriticalareasandbuffersand11treesthroughouttherestofthesite.Thesitegenerallyslopesdowntothesouthwestatapproximately10%.Acombinationoffullandbasicdispersionwillbeused,dischargingtowardstheonsitewetland.TheapplicanthassubmittedanArboristReport,WetlandReconnaissance,GeotechnicalEngineeringStudy,andaPreliminaryTechnicalInformationReportExist.Bldg.AreaSF:N/AProposedNewBldg.Area(footprint):N/AProposedNewBldg.Area(grass):N/A5iteArea:83,428SF(1.92acres)TotalBuildingAreaGSF:N/ASTAFFStaffRecommendsthattheEnvironmentalReviewCommitteeissueaDeterminationRECOMMENDATION:ofNonsignificance(ONS).ProjectLocationMap CityofRentonDepartmentofCommunity&EconomicDevelopmentcAMPBELLSHORTPLAYSHORTPLATEnvironmentalReviewCommitteeReportLUAIS-000239,ECF,SHPL-AERCReportPreliminaryCampbellShortPlatNeighborhoodDetailMapBoundaryandTopographicSurveyMapGeneralUtilityPlanPreliminaryTreeRetention/LandClearingPlanPreliminaryLandscapingPlan(Li&L2)ArboristReportpreparedbyArboristsNW,LLC(datedApril3,2015)WetlandReconnaissancepreparedbyAltmannOliverAssociates,(IC(datedJanuary29,2015)GeotechnicalEvaluationpreparedbyGeospectrumConsultants,Inc.(datedMarch11,2015)PreliminaryTechnicalInformationReportpreparedbyEncompassEngineering&Surveying(datedApril7,2015)WetlandDelineationMapConstructionMitigationDescriptionHoneyDewElementary—WalktoSchoolRouteOptionsAdvisoryNotestoApplicantB.GENERALINFORMATION:1.Owner(s)ofRecord:2.ZonIngDesignation:3.ComprehensivePlanLandUseDesignation:4.ExistingSiteUse:5.NeighborhoodCharacteristics:RentonChurchoftheNazarene,PGBox2640,RentonWA98056Residential—Sdu/ac(R-8)ResidentialSingleFamily(RS)Vacantlot,Category2wetland‘LocationParcelNumber(s)Address(es)LandUseZoningSite102305-9095SWCorneroftheintersecitonofResidentialSingleFamilyResidential-8NE9thStandAnacortesAveNENorth556145.01104345NE9thP1ResidentialSingleFamilyResidential-S556145-01004341NE9thP1556145-00904335NE9thP1556145-00804331NE9thP1South1023D5-9121800UnionAveNEResidentialSingleFamilyResidential-SWest102305-9078850UnionAveNEResidentialSingleFamilyResidential-SEast9510940120855BremertonAveNEResidentialSingleFamilyResidential-S9510940130861BremertonAveNEI95109401804451NE9thSt6.Access:AccesstotheshortplatisproposedfromMainAveS(102ndAveSE)toanewon-site7.SiteArea:publichalf-street.83,428SF(1.92acres)ReportofJune22,2015Page20(16PARTONE:PROJECTDESCRIPTION!BACKGROUNDA.EXHIBITS:Exhibit1Exhibit2Exhibit3Exhibit4ExhibitSExhibit6Exhibit7Exhibit$Exhibit9Exhibit10Exhibit11Exhibit12Exhibit13Exhibit14Exhibit15ERCandShortPlatReport—Campbell CityofRentonDepartmentofCommunity&EconomicDevelopmentEnvironmentalReviewCommitteeReportCAMPBELLSHORTPLATSHORTPLATLUAIS-000239,ECF,SNPL-AReportofJune22,2015Page3of16C.HISTORICAL/BACKGROUND:ActionLandUseFileNo.OrdinanceNo.ComprehensivePlanN/A532912/10/2007ZoningN/A532912/10/2007InterimZoningN/A572409/22/2014AdministrativePolicy/CodeN/A572402/27/2015Interpretation#Cl-64AnnexationN/A305809/01/1976D.PROJECTNARRATIVE:TheapplicantisrequestingShortPlatapprovalandEnvironmental(SEPA)Reviewforthesubdivisionofoneparcelofland(KingCountyAssessor’sParcelNo.102305-9095)intotwotracts(CriticalAreaTractAandJointUseDrivewayTract8)andtwo(2)lotsforthefutureconstructionof2single-familyresidences(Exhibit2).Ashortplatisanadministrativereviewprocess.ThesubjectpropertyislocatedattheSWCorneroftheintersecitonofNE9thStandAnacortesAveNE,inaportionofSection10,Township23North,Range05East,W.M.,withintheResidential-Sdwellingunitsperacre(R-8)zone.Thesiteiscurrentlyvacant.Thesubjectsiteisrectangularinshape(218’wideby381’long),totaling83,428SF(1.92acres).Thepropertyisborderedonthenorthandeastbydevelopedsingle-familyresidentiallots,onthesouthbyHoneyDewAthleticFieldsandtothewestbyopenfieldbehindtheRentonChurchofNazarene.Thesiteiswellvegetatedwithprimarilyaldertreeswithoccasionalevergreentreesandunderstory,suchasgrasses,salalandblackberries.Thesitegenerallyslopesdowntothesouthwestatapproximately10%.Theproposedlotsrangeinsizefrom7,912to13,445squarefeetinarea,withanaveragelotsizeof10,679squarefeet.Thesitealsocontainsanon-sitecriticalareatract(TractA)thatis57,434SFandwouldincludeashareddriveway(TractB)thatis1,807squarefeet.Theresidentialdensitywouldbe4.08dwellingunitspernetacre(du/ac)after2,830squarefeetofright-of-waydedication.AccesstothesiteisfromNE9thStreet.TheproposedjointusedrivewaywouldbeextendedtothesouthpropertylineofLot1foraccesstobothlots(Lot1andLot2).Half-streetfrontageimprovementswillbecompletedalongNE9thStandAnacortesAveNE,whichincludes2,830squarefeetofright-of-waylanddedication.The57,434squarefeet(1.32acre)criticalareatract(Category2wetland),throughoutthecentralandsouthwesternportionofthesite,requiresa50-footbufferforthatwetland.Theapplicantisproposingtoretain142treeswithinthecriticalareasandbuffersand11ofthe29healthysignificanttreesinthebuildableareaofthesite.TheprojectdevelopmentwillutilizeandextendexistingpublicutilitiesfromNE9thSttoeachlot.StormwaterrunofffromnewimpervioussurfaceswoulddraintobasIcdispersionBMPstowardsthenaturaldischargearea,theon-sitewetland.Theprimarysoilclassificationencounteredatthethreetestpitlocationwasgenerallysiltyfinetoveryfinesandwithoccasionalgravel,generallysuitableforresidentialdevelopment.Thegradingofthesitewouldconsistofexcavationofthedriveways,excavationofmaterialforthelevelingofthebuildingpadsandgenerallotleveling.Theexcavatedmaterialwouldberemovedfromthesite.Thequantitiesarenotknownatthistime.Gradingquantityinformationwouldbeprovidedwhentheengineeringplansareprovidedforreviewandapproval.TheapplicantsubmittedaGeotechnicalEvaluationpreparedbyGeospectrumConsultants,Inc.,datedMarch11,2015(Exhibit10).Thereportidentifiesfour(4)testpitsforthepurposeofassessingthesoilinfiltrationfeasibilityandsitedevelopment.Theseexplorationpitsweredugupto6Yzfeetinnative’ssoil.Nogroundwaterwasencounteredonexplorationpitsnumber1,2and3butseepagewasobservedat234feetFillsoilswereencounteredinTP-3locatedatthenorthwestquadrantofLot1.FillsoilsweresiltyveryfinesandwithERCandShortP/utReport—CampbeW CityofRentonDeportmentofCommunity&EconomicDevelopmentEnvironmentalReviewCommitteeReportCAMPBELLSHORTPLATSNORTPMTLUAIS-000239,ECF.SHPL-AReportofJune22,2015Page4of16occasionalgravelandwereonlyabout3feetthickatthatlocation.Naturalsoilsencounteredatthetestpitlocationsweregenerallysiltyfinetoveryfinesandwithoccasionalgravel,whichwouldallowforlimitedinfiltrationonLotsland2.Thenaturalsoilsunderlyingthepropertyareglacialtill(Qgt).TheQgtglacialtillsoilsarehighlyconsolidated,heterogeneousmixturesofsand,siltclayandgravelsoilsdepositedduringtheadvanceoftheVashonglaciation.Bearingsoilsareexpectedtobeencounteredatdepthsrangingfromabout3to4feetbelowthenaturalgroundsurfaceofthesite(belowanyfillsoilsonthesite).Thegeotechnicalreportconcludesthatthesiteconditionsaresuitableforthedevelopmentprovidedrecommendationsarefollowed.AccordingtoCityofRentoncitywIdegeotechnicalcriticalareasmaps,thesiteexhibitsmoderatetohighlandslidehazardcharacteristicsonthewesternmostportionandhighseismichazards.AccordingtotheGeotechnicalEvaluation,theundisturbedverydense/hardnaturalglacialtillsoilsencounteredshouldprovidegoodsupportfortheproposedstructurefoundations.Theapplicantwouldbe5ubjecttocompliancewiththerecommendationscontainedintheGeotechnicalEvaluationpreparedbyGeospectrumConsultants,Inc.datedMarch11,2015(oranupdatedrepàrtsubmittedatalaterdate)duringsiteandbuildingconstruction.E.PUBLICSERVICES:1.utilitiesa.Water:WaterservicewillbeprovidedbytheCityofRenton.b.Sewer:SewerservicewillbeprovidedbytheCityofRenton.c.Surface/StormWaterThereisnoformalstormconveyancesysteminNE7thStreet.2.Streets:Therearenofrontageimprovements.3.PolIceandFireProtection:CityofRentonPoliceandFireDepartmentswouldprovideservice.4.Schools:ThesiteiswithintheRentonSchoolDistrict.PARTTWO:ENVIRONMENTALREVIEWIIncompliancewithRCW43.21C.240,thefollowingenvironmental(SEPA)reviewaddressesonlythoseprojectimpactsthatarenotadequatelyaddressedunderexistingdevelopmentstandardsandenvironmentalregulations.A.EnvironmentalThresholdRecommendationBasedonanalysisofprobableimpactsfromtheproposal,staffrecommendsthattheResponsibleOfficials:IssueaDNSwitha14-dayAppealPeriodB.EnvironmentalImpactsTheProposalwascfrculatedandreviewedbyvariousCityDepartmentsandDivisionstodeterminewhethertheapplicanthasadequatelyidentifiedandaddressedenvironmentalimpactsanticipatedtooccurinconjunctionwiththeproposeddevelopment.Staffreviewershaveidentifiedthattheproposalislikelytohavethefollowingprobableimpacts:1.Watera.Wetland,Streams,LakesImpacts:TheapplicantsubmittedaWetlandReconnaissancepreparedbyAltmannOliverAssociates,LLC(AOA),datedJanuary29,2015.ThepurposeofthereconnaissancewastoconfirmthatthewetlandboundaryandclassificationasdelineatedbyAlderNW(datedDecember16,2008)remainedvalid.Pursuanttotheprovided2008report,thesubjectwetlandhasbeenclassifiedasaCategory2wetlandthroughoutthecentralandsouthwesternportionofthesite.BasedontherecentsitereviewbyADA,thesurveyedwetlandboundaryappearstoremainaccurateandre-delineationdidnotappearwarranted.Inaddition,theclassificationofthewetlandasaCategoryIIwetlanddidnotchange.AwetlandclassifiedasCategoryIIrequiresastandardprotectivebufferof50feet(RMC4-3-OSOM.6.c).ThemajorityoftheexistingrunoffERCandShortPlotReport—Campbell CityofRentonDepartmentofCommunity&EconomicDevelopmentEnvironmentalReviewCommitteeReportCAMPBELLSHORTPLATLUAI5-000239,ECF,SHPL-AReportofJune22,2015pageSof16sheetflowssouthwesttowardstheon-sitewetland.Thevegetationwithinthewetlandincludesblackcottonwood,Oregonashandredaldertrees.Thepredominateshrubspecieswithinthewetlandishardhackspirea.TheAlderNW’sreportindicatesthatthewetlandunitanditsbuffer(TractA)havebeenaffectedbytheexistingdevelopmentssurroundingthepropertyorshowssignsofhumandisturbance.Thebufferalongthesouthandwestsideofthewetlandhasbeenaffectedbypreviousdevelopmentincludingtheexistingathleticfieldsandtheexistingstormwatertreatmentfacilityextendingalongthewestsideofthewetland.Theexistingdevelopmentsonthesouthandwestsideofthepropertyextendstothelimitsofthewetlands;thisactivitylikelyfilledsomeportionofthesubjectwetland.ThechangescausedbypastdevelopmenthavecreatedasmallislandhabitatsurroundedbytheexistingurbandevelopmentTheapplicantwilldesignatethewetland,associatedbuffers,andcontiguouspocketareasalongthewetlandbufferthatarenotassociatedwiththelotsasaNativeGrowthProtectionArea(NGPA)Tract(TractA).Noimpactstoexistingfunctionsandvaluesofthewetlandareaareexpectedasaresultofthesubjectdevelopment.TheapplicantsubmittedaPreliminaryTechnicalInformationReport(TIR)preparedbyEncompassEngineering&Surveying(datedApril7,2015;Exhibit11).Acombinationoffullandbasicdispersionwouldbeused,dischargingtowardstheonsitewetland.FulldispersionisproposedintheplansforlotlandtractAandbasicdispersion/limitedinfiltrationisproposedforlot2.Fulldispersion,basicdispersionandlimitedinfiltrationmustbedesignedandlocatedperCityofRentonAmendmentstoKingCountyStormWaterDesignManualsectionsC.2.1andC.2.4and5.4.Calculationswithinthereportfortheprojectwouldbeexemptfromdetentionsincethedevelopmentofthisprojectwouldresultinflowcontrolthatislessthan0.1CFSincreaseofthe100-yearrunoff.SincethetotalproposedPGISislessthan5,000SF,waterqualitywouldalsonotberequiredforthisprojectperKingCountyStormWaterDesignManualAmendedbyCityofRentonsection1.2.8.MitigationMeasure:Nofurthermitigationrecommended.Nexus:N/AC.CommentsofReviewingDepartmentsTheproposalhasbeencirculatedtoCityDepartmentandDivisionReviewers.Whereapplicable,theircommentshavebeenincorporatedintothetextofthisreportand/or“AdvisoryNotestoApplicant”(Exhibit15).CopiesofallReviewCommentsarecontainedintheOfficialFileandmaybeattachedtothisreport.PARTTHREE:ADMINISTRATIVESHORTPLATREVIEWIA.APPLICABLEsEalONsOFTHERENTONMUNICIPALCODE:1.Chapter2ZonIngDIstrict—UsesandStandardsa.Section4-2-020:PurposeandIntentofZoningDistrictsb.Section4-2-060:ZoningUseTable—UsesAllowedinZoningDesignationsc.Section4-2-110:ResidentialDevelopmentStandardsd.Section4-2-115:ResidentialDesignandOpenSpaceStandards2.Chapter3EnvIronmentalRegulationsandOverlayDistrictsa.Section4-3-050:CriticalAreasRegulations3.Chapter4City-WidePropertyDevelopmentStandardsa.Section4-4-030:DevelopmentGuidelinesandRegulations—Generalb.Section4-4-060:Grading,ExcavationandMiningRegulationsc.Section4-4-130:TreeRetentionandLandClearingRegulationsERCandShortPlotReport—Campbell CityofRentonDepartmentofCommunity&EconomicDevelopmentEnvironmentalReviewCommitteeReportCAMPBELLSHORTATLUAIS-000239,ECF,SHPL-AReportofJune22,2015Page5of164.Chapter6StreetsandUtilityStandardsa.Section4-6-030:Drainage(SurfaceWater)StandardsLi.Section4-6-060:StreetStandardsS.Chapter7SubdivisionRegulationsa.Section4-7-070:DetailedProceduresforShortSubdivisionsb.Section4-7-120:CompatibilitywithExistingLandUseandPlan—GeneralRequirementsandMinimumStandardsc.Section4-7-150:Streets—GeneralRequirementsandMinimumStandardsd.Section4-7-160:ResidentialBlocks—GeneralRequirementsandMinimumStandardse.Section4-7-170:ResidentialLots—GeneralRequirementsandMinimumStandards6.Chapter9Permits—Specifica.Section4-g-070:EnvironmentalReviewProcedures7.ChapterUDefinitionsB.APPUCABLESECTiONSOFTHECOMPREHENSIVEPLAN:1.LandUseElement:ResidentialSingleFamily(AS)landusedesignation2.CommunityDesignElement:Naturalareas;EstablishedResidentialareas;andNewandlnflhlDevelopment;3.EnvironmentElement:WetlandC.DEPARTMENTANALYSIS:1.EnvironmentalReviewExceptwhenlocatedonlandscoveredbywaterorsensitiveareas,shortplatsareexemptfromSEPAenvironmentalreviewpursuanttoWAC197-11-800(6)(a).Theproposedprojectissubjecttoenvironmentalreviewduetoacriticalareaonthesite(withinproposedTractA)andissubjecttoCityofRentonEnvironmentalReviewProcedures(RMC4-9-070).2.CompliancewithERCConditionsTheCityofRenton,onJune22,2015,issuedaDeterminationofNonsignificance(DNS).3.StaffReviewCommentsRepresentativesfromvariouscitydepartmentsandtheRentonSchoolDistricthavereviewedtheapplicationmaterialstoidentifyandaddressissuesraisedbytheproposeddevelopment.Thesecommentsarecontainedintheofficialfile,andtheessenceofthecommentshasbeenincorporatedintotheappropriatesectionsofthisreportandtheDepartmentalRecommendationattheendofthisreport.4.CommentsfromthePublicCommentsreceivedfromthepublicwereconsideredduringreviewoftheproposedproject5.ConsistencywithShortPlatCrIteriaApprovalofashortplatisbaseduponseveralfactors.Thefollowingshortplatcriteriahavebeenestablishedtoassistdecision-makersinthereviewoftheplat:a)CompliancewiththeComprehensiveDesignationThesiteisdesignatedResidentialSingleFamily(RS)ontheComprehensivePlanLandUseMap.LanddesignatedRSisintendedtobeusedforqualitydetachedresidentialdevelopmentorganizedintoneighborhoodsaturbandensities.Itisintendedthatinfilldevelopmentbecarefullydesignedtoenhanceandimprovethequalityofsingle-familylivingenvironments.TheproposalisconsistentERCandShortPlotReport—Campbell CityofRentonDepartmentofCommunity&EconomicDevelopmentEnvironmentalReviewCommitteeReportCAMPBEUSHORTPMTLUAIS-000239,ECF,SHPL-4ReportofJune22,2015Page7of16withthefollowingComprehensivePlanLandUseandCommunityDesignElementpolicies,ifallconditionsofapprovalaremet,unlessnotedotherwise:PolicyLU-158.Netdevelopmentdensitiesshouldfallwithinarangeof4.0to8.0dwellingunitspernetacreinResidentialSingleFamilyneighborhoods.PolicyObjectiveMetNotMetPolicyEN-G.Whendevelopmentmayimpactwetlands,thefollowinghierarchyshouldbefollowedindecidingtheappropriatecourseofaction:a.avoidimpactstothewetland,b.m[nimizeimpactstothewetland,c.restorethewetlandwhenimpacted,d.recreatethewetlandataratiowhichwillprovideforitsassuredviability&success,e.enhancethefunctionalvaluesofanexistingdegradedwetland.PolicyObjectiveMetNotMetPolicyEN-7.Protectbuffersalongwetlandstofacilitateinfiltrationandmaintainstablewatertemperatures,provideforbiologicaldiversity,reduceamountandvelocityofrun-off,andprovideforwildlifehabitat.PolicyObjectiveMetNotMetObjectiveCD-A.TheCity’suniquenaturalfeatures,includinglandform,vegetation,lakeshore,river,creeksandstreams,andwetlandsshouldbeprotectedandenhancedasopportunitiesarise.PolicyObjectiveMetDNotMetObjectiveCD-C.Promotereinvestmentinandupgradeofexistingresidentialneighborhoodsthroughredevelopmentofsmall,underutilizedparcelswithinfilldevelopment,modificationandalterationofolderhousingstock,andimprovementstostreetsandsidewalkstoincreasepropertyvalues.PolicyObjectiveMetJNotMetPolicyCD-U.Sidewalksorwalkingpathsshouldbeprovidedalongstreetsinestablishedneighborhoods,wheresidewalkshavenotbeenpreviouslyconstructed.Sidewalkwidthshouldbeampletosafelyandcomfortablyaccommodatepedestriantrafficand,wherepractical,matchexistingsidewalks.fjPolicyObjectiveMetJNotMetPolicyCD-14.Inflhldevelopment,definedasnewshortplatsofnineorfewerlots,shouldbeencouragedinordertoaddvariety,updatehousingstock,andincreasevitalityofneighborhoods.PolicyObjectiveMetNotMetPolicyCD-iS.Infilldevelopmentshouldbereflectiveoftheexistingcharacterofestablishedneighborhoodsevenwhendesignedusingdifferentarchitecturalstyles,and/orrespondingtomoreurbansetbacks,heightorlotrequirements.Infilldevelopmentshoulddrawonelementsofexistingdevelopmentsuchasplacementofstructures,vegetation,andlocationofentriesandwalkways,toreflectthesiteplanningandscaleofexistingareas.PolicyObjectiveMetNotMetb)CompliancewiththeUnderlyingZoningDesignationThesubjectsiteisdesignatedResidential-B(R-8)DwellingUnitsPerNetAcre(du/ac)ontheCityofRentonZoningMap.RMC4-2-11OAprovidesdevelopmentstandardsfordevelopmentwithintheERCandShortP/atReport—Campbell CityofRentonDepartmentofCommunity&EconomicDevelopmentEnvironmentalReviewCommitteeReportCAMPBELLSHORTPLATLUAIS-000239,ECF,SHPL-AReportofJune22,2015PageSof16R-8zoningclassification.Theproposalisconsistentwiththefollowingdevelopmentstandardsifallconditionsofapprovalarecompliedwith:Density:ThealloweddensityrangeintheR-8zoneisamaximumof8.0dwellingunitspernetacre.Thereisalsoaminimumdensityo14dwellingunitspernetacre.Aftersubtracting2,830squarefeetforproposedright-of-waydedications,1,807squarefeetforprivateaccesseasements,and57,434squarefeetforcriticalareas,thenetsquarefootageofthesiteis21,357squarefeet(0.49netacres).The2-lotproposalwouldarriveatanetdensityof4.08dwellingunitspernetacre(2lots!0.49acres=4.08du/ac),whichfallswithinthepermitteddensityrangefortheR-8zone.Additionally,duetotheenvironmentalconstraintsofthepropertytheminimumdensityrequirementsofthecodecanbewaived(RMC4-2-11OD.1.bj.LotDimensions:TheminimumlotsizepermittedintheinterimR-8zoningdesignationis7,000squarefeet.Aminimumlotwidthof60feetisrequiredforInteriorlotsand70feetforcornerlots.Lotdepthisrequiredtobeaminimumof90feet(Exhibit2).Asdemonstratedinthetablebelow,alllotsmeettherequirementsforminimumlotsize,depth,andwidthfortheR-8zone:ProposedLotsLotSizeLotDepthLotWidth7,000SFminimum90fretminimum60feetrequired(70feetcornerlots)13,445GSF90feet71.12feetLot1(7,318NSF*)Lot27,912SF100.37feet.91.13feetA))t.ots(Average)3,948SF95.19feet81.13feetTractA—CriticalAreas57,434SFN/AN/ATractB—Jointuse1,807SFN/AN/ADriveway*secausethepanhandleportionofthenorthwestcornerofLot1hasawidthoflessthan80%oftheminimumlotwidthof50’,itwassubtractedfromthegrosslotareaandnotedas“net”area.Setbacks:Theminimumfrontyardandrearyardsetbacksintheinterim8-8zoneare25feetfrontyard;25feetsideyardalongastreet(includingaccesseasements);7.5feetsideyards(combined15feetwithnotlessthanSfeetoneithersideper0-64);and25feetrearyard.TheproposedlotsareorientedsothatthefrontyardsofeachlotwouldfacenorthtowardsNE9thStreetandtherearyardswouldbelocatedalongthesouthportionofthelots.Theproposedlotsappeartocontainadequateareatoprovidealltherequiredsetbackareas.Compliancewithbuildingsetbackrequirementswouldbereviewedatthetimeofbuildingpermitreview.BuildingStandards:TheR-8zonepermitsonedwellingwithoneaccessorydwellingunitperlotAccessorystructuresarepermittedatamaximumnumberoftwoperlotwithamaximumsizeof720squarefeeteach,oramaximumofoneperJotwithamaximumof1,000squarefeet.Accessorystructuresarepermittedonlywhenassociatedwithaprimarystructurelocatedonthesameparcelofland.Thepropertyiscurrentlyvacantofanystructures.HeightThemaximumbuildingheightinthe8-8zoneis30feet.Detachedaccessorystructuresmustremainbelowaheightof15feetandänestory.Buildingheightisbasedonthemeasurementoftheverticaldistancefromthegradeplanetotheaverageheightoftheroofsurface.Thegradeplaneistheaverageofexistinggroundleveladjoiningthebuildingatexteriorwalls.Wherethefinishedgroundlevelslopesawayfromtheexteriorwalls,thereferenceplaneshallbeestablishedbythelowestpointswithintheareabetweenthebuildingandthelotline,orwherethelotlineismorethan6feetfromthebuilding,betweenthebuildingandapoint6feetfromthebuilding.Onedwellingunit,oftypicaltwo-story,wood-frameconstruction,perlotisplanned.Buildingelevations,ERCandShortPlatReport—Campbell CityofRentonDepartmentofcommunity&EconomicDevelopmentEnvironmentalReviewCommitteeReportCAMPBELLSHORTPLATLUAIS-O00239,ECF,SHPL-AReportofJune22,2015Page9of16whichwouldbeusedtodeterminebuildingheight,havenotbeensubmitted.Thebuildingstandardsfortheproposedlotswouldbereviewedandverifiedatthetimeofbuildingpermitreview.BuildingCoverage:ThemaximumbuildingcoverageintheR-8zoneis40percent.Compliancewithbuildingcoveragerequirementswouldbereviewedatthetimeofbuildingpermitreview.ImperviousCoverage:ThemaximumallowedimpervioussurfaceareaintheR-8zoneisfifty-fivepercent(55%).Themaximumbuildingcoverageislimitedto40%perlot,andthemaximumimpervioussurfaceis55%(OrdinanceNo.5724andCI-64).Compliancewithimperviouslotcoveragerequirementswouldbereviewedatthetimeofbuildingpermitreview.Parking:Off-streetparkingfortwo(2)vehiclesperresidentialunitisrequired.Sufficientareaexists,oneachlot,toaccommodateoff-streetparkingforaminimumoftwovehicles.c)CommunityAssetsSiteLandscaping:Landscapingisrequiredforallsubdivisions,includingshortplats.Adetailedlandscapeplanmustbeapprovedpriortoissuanceofstreetorutilityconstructionpermits.Tenfeet(10’)ofon-sitelandscapingisrequiredalongallpublicstreetfrontages,withtheexceptionofareasforrequiredwalkwaysanddrivewaysperRMC4-4-070.Suchlandscapingshallincludeamixtureoftrees,shrubs,andgroundcoverasapprovedbytheDepartmentofCommunityandEconomicDevelopment.Wherethereisinsufficientright-of-wayspaceornopublicfrontage,streettreesarerequiredinthefrontyard.MinimumplantingstripwidthsbetweenthecurbandsidewalkareestablishedaccordingtothestreetdevelopmentstandardsofRMC4-6-060.Streettreesand,ataminimum,groundcoveraretobelocatedinthisareawhenpresentTheCity’slandscapingregulationsrequiretheinstallationoflandscapingwithinthepublicright-of-wayandthelandscapingproposedmusteitherconsistofdroughtresistantvegetationorshallbeirrigatedappropriately.Theapplicanthassubmittedaconceptuallandscapeplanincludingthefollowinglandscapingwithinthe8-footplanterstrip:4PersianParrotia;15boxleafhebe,15evergreenhuckleberry,10Englishlavender;and45kinnickinnick(Exhibit7).Thesubmittedlandscapingplanidentifiesthatalltrees,shrubsandotherplantswillbemaintainedbythedeveloperbywatering,pruning,cultivatingandweedinguntilfinalacceptancebythefutureownerbutinnocaselessthan90daysaftersubstantialcompletionoftheproject.StaffrecommendsthattheapplicantberequiredtorevisetheLandscapePlantoshowaminimumof10feetofon-sitelandscapingalongthestreetfrontageofLot1.Additionally,wherethereisinsufficientright-of-wayspaceornopublicfrontage,twostreettreesarerequiredinthefrontyard.Therefore,aminimumoftwo(2)treesaretobelocatedinthefrontyardofproposedLot2priortoconstructionpermitapproval.TreeRetention:Existingtreesshallberetainedwherefeasible.RMC4-4-130requires30percentoftreestoberetained.Iftherequirednumberoftreescannotberetained,theymustbereplacedaccordingtoRMC4-4430H.TheapplicantprovidedaTreeRetentionPlan(Exhibit6)andaTreeRetentionWorksheetTheapplicantisproposingtoretainalltreeswithincriticalareasandbuffersofTractAandnine(9)treesthroughouttherestofthesite(7-Douglasfirtreesoutsidethewetlandbufferand2Madronetreesand1DouglasfirtreewithinthesouthportionofLot2).Thetreesproposedtoberetainedrangebetween8and24inchesincaliper.AccordingtotheArboristReport,thereareatotalof135significanttreeswithadiameteratbreastheight(DBH)of6”orgreaterwithintheparcelboundaries(Exhibit8).RedAlderrepresentsthemajorityorroughly60%,followedbywildCherry,Cottonwood,Douglasfir,Hazelnut,Pacificwillow,andarowofBamboo.Theidentifiedtreesrangeindiameterfrom6”to60”DBH.Thereareatotalof38(ofthepossible135)treesthatexistoutsidethewetland,wetlandbuffersortheproposedprivateaccesstractAspreviouslymentioned,theapplicantisrequiredtoretain30percentofthetreeslocatedon-sitethatarenotlocatedwithincriticalareas,proposedrights-of-way,andaccesseasements.Therefore,theapplicantwouldberequiredtoretainatleast11treesinordertomeetthe30%treeretentionERCandShortPlotReport—Campbell CityofRentonDeportmentofCommunity&EconomicDevelopmentEnvfronmentoiReviewCommitteeReportCAMPBELLSHORTPMTLUAI5-Q00239,ECFSHPL-AReportofJune22,2015Page10of16requirement.Theapplicanthasproposedtoretain11ofthesignificanttreesthroughoutthesite,therebycomplyingwithTreeRetentionrequirementsofthecode(Exhibit6).TheproposedtreeretentionplanpreservesandenhancestheCity’sphysicalandaestheticcharacterbyminimizingindiscriminateremovalofthevegetationon-site.TheprovidedTreeProtectionPlanwouldbeconsistentwiththespecifictreeprotectionmeasuresrequiredbyRentonMunicipalCodeforretainedtreesandseektoretain11trees,whichrñeetstheminimumtreeretentionrequirementCriticalAreas:Thesitecontainsacriticalareathroughoutthecentralandsouthwesternportionoftheproperty.TheapplicantsubmittedaWetlandReconnaissancepreparedbyAQA,LLC(datedJanuary29,2015;Exhibit9),whichaddressesthesite’scriticalarea.Theon-sitewetlandIsaclassifiedasaCategoryIIunderRMC4-3-050(M),andreceivesastandardbufferof50feet.TheapplicantisproposingtodesignateallthewetlandandassociatedbufferasadesignatedNativeGrowthProtectionArea(NGPA)Tract.Thevegetationwithinthewetlandincludesblackcottonwood,OregonashandredAldertrees.Thepredominateshrubspecieswithinthewetlandishardhackspirea,whichallowsthewetlandtoservesomewhatasafilterandallowsedimentinthewatertosettle.The2008AlderNW’sWetlandEvaluationReportdelineatedthelimitsofthewetlandandindicatedtheeffectivenessofthewetlandbuffersandhowtheyhavebeenaffectedbytheexistingresidentialdevelopmentactivityimmediatelyadjacenttothesubjectpropertyCExhibits9&12).Forexample,thesouthernlimitsofthewetlandgenerallyfollowthesouthernpropertylineduetothedevelopmentoftheathleticfield.Hydrologically,thewetlandissupportedbysurfacerunoffandnearsurfaceseepagefromtheadjacentsideslopes,alongwithsomedischargefromthestormwaterpondtothewestNobuffermitigationorenhancementplanisproposedaspartofthedevelopment.TheCriticalAreasTractisproposedtobea57,434-square-footwetlandtract.InorderfortheCategoryIIwetlandanditsproposedbuffertoremainprotected,staffrecommends,asaconditionofapproval,thattheapplicantplaceTractAinaNativeGrowthProtectionEasement(NGPE),whichshallbenotedonthefaceoftheplat.StaffrecommendsasaconditionofapprovalthataHomeowners’Association(HOA)orsimilarentitybeestablishedforthedevelopment,toensurethatresponsibilityistakenformaintenanceofcommonimprovementsandtractswithintheshortplat.Finally,adequateprovisionsarebeingmadefordrainageandutilityconnections.EachownerofLotsshallhaveafractionalinterestintheCriticalAreasTractAinordertoprotectthesiteinperpetuity.Staffisrecommending,asaconditionofapproval,thattheapplicantinstallawood,split-railfencewithwetlandsignagealongtheedgeofTractA.Thesplit-railfenceshallbeconstructedpriortorecordingoftheshortplat.StaffalsorecommendsaconditionofapprovalrequiringtheHOAorsimilarentityensuremaintenanceofthesplit-railfence.d)CompliancewithSubdivisionRegulationsStreets:Nonewpublicstreetswouldbecreatedaspartoftheproposedshortplat.Thereiscurrentlyapartiallypavedandimprovedpublicright-of-wayalongthefrontageofNE9thStreet.Theexistingright-of-waywidthinNEgthStreetis30feetandhasbeenidentifiedasaresidentialaccessstreet.TherequiredfrontageimprovementsalongNE9thStreetinclude16feetofpavement,a0.5-foot-widecurb,an8-foot-widelandscapedplanter,anda5-foot-widesidewalk.Theapplicanthasproposedtodedicate2,830squarefeettoforright-of-wayimprovementsonNE9thStreet.TheproposedshortplotisanticipatedtogenerateadditionaltrafficontheCity’sstreetsystem.However,itisnotanticipatedthattheproposedprojectwouldsignificantlyoradverselyimpacttheCityofRenton’sStreetsystemsubjecttothepaymentofcode-requiredimpactfeesandtheconstructionofcode-requiredfrontageimprovements(Exhibitl5).InordertomitigateERCandShortPiatReport—Campbell CityofRentonDeportmentofCommunity&EconomicDevelopmentEnvironmentalReviewCommitteeReportCAMPBELLSHORTPLATLUAIS-000239,ECF,SHPL-AReportofJune22,2015Page11of16transportationimpacts,paymentoftransportationimpactfeesisapplicableonallnewsingle-familyhomes.Thecurrenttransportationimpactfeerateis$2,214.44pernewlot.Thetransportationimpactfeethatiscurrentatthetimeofbuildingpermitwillbelevied.Paymentofthetransportationimpactfeeisdueatthetimeofissuanceofthesingle-familybuildingpermits.Theapplicantisproposinga20-foot-widejointusedriveway,TractB,alongthefirst90feetoftheeastpropertylinetoservetheshortplat’sinternalsiteaccessneeds.Theshareddrivewayisproposedtoconnectwiththeexistingpublicstreet(NE9thSt).Accesstoeachlotshallbeservedfromtheproposedshareddriveway;anotetothiseffectshallbeplacedonthefaceoftheshortplat.TheminimumrequirementsidentifiedinRMC4-6-060iSharedDrivewayStandardsincludingbutnotlimitedtomaintenancecovenantsandaccesseasements(includingaCityofRentonPublicUtilityeasement)shallberecordedpriorto,orconcurrentwith,therecordingoftheshortplatNoadditionalcurbcutsfromtheshortplattothepublicstreetwillbeallowedaspartoftheplattingprocess.UpontheapprovaloftheRentonFireDepartment,thewidthoftheshareddrivewaytractandpavedsurfacemaybereducedfromtwentyfeet(20’)toaminimumofsixteenfeet(16’).Allnewdrivewayapproachesforsingle-familylotsarerequiredtomaintainafive-foot(5’)separationfromtheadjoiningpropertyline(RMC4-8-OGOl.2.b).Onereasonforthisissotheapronofthedrivewayapproachdoesn’textendontotheright-of-wayoftheneighboringlotStaffisrecommendingthattheapplicantprovideashareddrivewayapproachtoTractBthatIsnocloserthanfivefeet(5’)totheeastpropertylineinordertoretainenoughmomforthedrivewayapproachapron,roadmaintenance,aprivacyfence,andonsitelandscapescreening.Theadditionalareaontheeastsideoftheshareddriveway,betweentheeastpropertylineandtheedgeofthepavement,shouldnotimpactthe2-lotshortplatsabilitytomaintaincompliancewithRentonMunicipalCode.Themaximumwidthofanysingleloadedgaragedrivewayshallnotexceedninefeet(9’),andthemaximumwidthofanydouble-loadedgaragedrivewayshallnotexceedsixteenfeet(16’)._JhereisanexistingluminairepolelocatedatcornerofAnacortesAveNEandNE9thSt.Staffisrecommending,asaconditionofshortplatapproval,thattheexistingluminairepolebelocatedwithintheproposed8-foot-wideplanterstripatcornerofAnacortesAveNEandNE9thSt.BlacksNoblocksarebeingcreatedaspartofthisshortplat.Lots:Theproposedtwo(2)lotswouldmeettheprinciplesofacceptabilityforashortplatasstatedinRMC4-7-070B.Eachlotwouldbealegalbuildingsitecompliantwithshape,orientation,andarrangementofthesubdivisionregulationsandthedevelopmentstandardsoftheR-8zone.Alllotsarelocatedoutsidethe50-footwetlandbufferandthedesignallowsfortreepreservation,andpublictoprivateshareddrivewayaccess.Alllotsmeettherequirementsforminimumlotsize,depth,andwidthasdemonstratedaboveinthelotdimensiontableonpage8ofthisreport.Allproposedlotsappeartohavesufficientbuildingareaforthedevelopmentofdetachedsingle-familyresidences,providedtheapplicantcomplieswiththeconditionsofapproval.Accesstoapublicroadwouldbecreatedtoeachlegalbuildinglot.NodirectdrivewayaccessfromanylottoNE9thStwillbeallowed.Inadditiontotheproposedtwonewlots,thesmallsubdivisionwouldcreateanewshareddrivewaytract(TractB)andonenewwetlandtract(TractA).e)CompliancewithResidentialDesignStandardsRMC4-2-usEResidentialDesignandOpenSpaceStandardsprovidesresidentialandopenspacestandardsfordevelopmentwithintheR-Szohingclassification.ResidentialDesignandOpenSpaceStandards(RMC4-2-115)areapplicableintheR-8zoningclassification.TheStandardsimplementpoliciesestablishedintheLandUseandCommunityDesignElementsoftheComprehensivePlan.CompliancewithSiteDesignStandardsforlotconfiguration,garages,openspace,primaryentry,façademodulation,windowsanddoors,scale,bulk,andcharacter,roofs,eaves,architecturaldetailing,andmaterialsandcolorwouldbedemonstratedpriortoissuanceofbuildingpermits.CRCandShortNatReport—Campbell CityofRentonDepartmentofCommunity&EconomicDevelopmentEnvironmentalReviewCommitteeReportCAMPBELLSHORTPLATLUAIS-000239,ECF,SHPL-AReportofJune22,2015Page12of16Buildingdesigns,whichwouldbeusedtoevaluateresidentialdesignstandards,havenotbeensubmittedfortheundevelopedlotsyetTheywouldbesubmittedforbuildingpermitreview.ftReasonablenessofProposedBoundariesAccess:Eachlotmusthaveaccesstoapublicstreetorroad.Therewillbea20-foot-wideshareddrivewayalongtheeastpropertyline,designedasTractB,whichwillbeconstructedtoservetheproposedtwo(2)lotsfromNE9thSt.Topography:Thesiteslopesdownfromanelevationofabout416feetalongtheeastpropertylinetoanelevationofabout406feet.Thesouthwestcornerofthepropertyisgenerallyflatataboutanelevationof404to406feetDuetothepotentialforerosionthatcouldoccurduringconstructionactivities,staffrecommendedaconditionofapproval,thatTemporaryErosionControlPlanbeinstalledandmaintainedinaccordancewiththeDepartmentofEcology’sErosionandSedimentControlStandardsandsubjecttotheapprovaloftheDepartmentofCommunity&EconomicDevelopmentPlanReviewprojectmanager.RelationshiptoExistingUses:AllpropertiessurroundingthesubjectsitearedesignatedR-8ontheCity’szoningmap.Tothenorthandeastofthesite,thereareexistingsingle-familyresidences.TothesouthofthesitearetheHoneyDewathleticfieldsandtothewest,beyondthewetlandsonthesubjectsite,isachurch.Theproposalissimilartoexistingdevelopmentpatternsintheareaandiscompatiblewiththeathleticfieldsandthechurchproperty.Inaddition,theproposalisconsistentwiththeComprehensivePlanandZoningCode,whichencouragesresidentialInfilldevelopment.g)AvailabilityandImpactanPublicServices(Timeliness)PoliceandFire:PoliceservicewouldbeprovidedbytheRentonPoliceDepartmentTheRentonPoliceDepartmenthascommentedthattheproposedprojectwouldhaveminimalimpactonpoliceservices.Sufficientresourcesexisttofurnishservicestotheproposeddevelopment,subjecttotheconditionthattheapplicantprovidesCode-requiredimprovementsandfees.FireDepartmentapparatusaccessroadwaysarerequiredtobeaminimumof20feetwidefullypaved.Thefireflowrequirementforasingle-familyresidenceisaminimum1,000gallonsperminute(gpm)forstructuresupto3,600sf(includinganyattachedgarageandbasement).Ifdwelling(s)exceed3,600sf,aminimumof1,500gpmwouldberequired.Aminimumonefirehydrantisrequiredwithin300feetoftheproposedbuildingsandtwohydrantsifthefireflowrequirementgoesupto1,500gpm.Anyexistinghydrantscanbecountedtowardtherequirementsaslongastheymeetcurrentcodeincluding5inchstorzfittings.Aminimumofonenewhydrantshallberequiredastherearenohydrantswithin300feetofLot2.Thefireimpactfeesarecurrentlyapplicableattherateof$495.10persingle-familyunit.ThefeeshallbepayabletotheCityasspecifiedbytheRentonMunicipalCodepriortobuildingpermitissuance.Furthermore,buildingsshallhaveapprovedaddressnumbersplacedinapositionthatisplainlylegibleandvisIblefromNE9thStreetSchools:TheRentonSchoolDistricthasindicatedthattheyhavecapacitytoaccommodatestudentsanticipatedfromthisdevelopment.StudentswouldattendHoneyDewElementarySchool,McknightMiddleSchool,andHazenHighSchool.TheMiddleSchoolistheonlyschoolthatwouldbelocatedfarenoughawayfortheschooldistricttoprovidebustransportation.Theothertwoschoolsarewithinwalkingdistanceandnoschoolbuswouldbeprovided.Thereisanidentifiedsafewalkingroutetotheelementaryschool(Exhibit14).ThesafewalkingroutetothehighschoolincludeswalkingnorthonAnacortesAveNE,eastonNE10thStandnorthalongHoquiamAveNE.ASchoolImpactFeewouldbecollectedonbehalfoftheRentonSchoolDistrictforeachnewresidenceatthetimeofbuildingpermitissuance.ThecurrentRentonSchoolDistrictfeeforeachnewsingle-familydwellingis$5,541.00perunit.ERCandShortPlotReport—Campbell CityofRentonDepartmentofCommunity&EconomicDevelopmentEnvironmentalReviewCommitteeReportCAMPBELLSHORTPLATLUA1$-000239,ECF,SIIPL-AReportofJune22,2015Page13of16Parks:AlthoughtherewouldbenosignificantimpactstotheCityofRentonParkSystemanticipatedfromtheproposedproject,aParkImpactPeelsrequiredofallnewresidentialdevelopment.ThecurrentParkImpactFeeis$1,441.29pernewresidenceandispaidatthetimeofbuildingpermitissuance.StormWater:AdrainageplananddrainagereportwassubmittedbyEncompassEngineering&Surveying(datedApril7,2015;Exhibit11).PursuanttothisreportthesubjectsiteisunderlainwithAlderwood,gravellysandyloam(AgC).Theproposed2-lotsubdivisionissubjecttoFullDrainagereviewinaccordancewiththeCityofRentonAmendmentstothe2009KingCountySurfaceWaterManual.RasedontheCity’sflowcontrolmap,thissitefailswithintheFlowControlDurationStandard,ForestedCondition.TheprojectissubjecttoflowcontrolOMPsperCityofRentonAmendmentstoKingCountyStormWaterDesignManualsection1.2.3.3.FulldispersionisproposedintheplansforlotlandtractAandbasicdispersion/limitedinfiltrationisproposedforlot2.Pulldispersion,basicdispersionandlimitedinfiltrationmustbedesignedandlocatedperCityofRentonAmendmentstoKingCountyStormWaterDesignManualsectionsC.2.1andC.2.4and5.4.Becausethedevelopmentofthisprojectwillresultinlessthan0.1CFSincreaseofthe100-yearrunoff,detentionisnotrequiredforthisprojectperKingCountyStormWaterDesignManualAmendedbyCityofRenton.FinalplansandadrainagereportbasedontheCityofRentonAmendmentstothe2009KingCountySurfaceWaterManualarerequiredtobesubmittedwiththeutilityconstructionpermit.Thecurrentsurfacewatersystemdevelopmentcharge(SDC)feeis$1,350.00pernewlot.Feesarepayablepriortoissuanceoftheconstructionpermit,andthefeeratethatiscurrentatthetimeofissuanceoftheutilityconstructionpermitwillbeapplicable.Water:TheproposeddevelopmentiswithintheCity’swaterserviceareaandintheHighlands565hydrauliczone.ThedevelopmentisoutsideoftheCity’saquiferprotectionareas.InNE9thStthereisanexisting8inchwatermain(seeCitywaterprojectplanno.W2107),whichcandeliver2,000gallonsperminute(gpm).LocatedatthesouthwestcornerofNEgthStandBremertonAveNEisafirehydrantthatcandeliver1,000gallonsperminute.However,thehydrantismorethan300feetawayfromthenewsoutherlylot.Thedevelopmentwouldbesubjecttothefollowing:1)applicablewaterimprovements,includinginstallationof1-inchminimumdomesticwaterservicelineandmetertoeachlotpriortorecordingoftheplatandsubmittalofcivilplansforthewatermainextension;2)watersystemdevelopmentchargesandwatermeterinstallationsfee(basedonthesizeofthemeters)inordertoprovidewaterservicefordomesticuseandfireprotectiontothesubjectdevelopment;3)installationofanadditionalfirehydrantwithin300feetofeachlotinordertoprovidetherequiredcoverage.SanitarySewer:SewerserviceisprovidedbytheCityofRenton.InNE9thStthereisanexisting8-inchsewermainthattheapplicantwouldbeallowedtodirectlyconnectto.ThedevelopmentIssubjecttoawastewatersystemdevelopmentcharge(SDC)feethatisbasedonthesizeofthenewdomesticwatertoservethenewhomeoneachlot.Thesewerfeefora¾inchor1inchmeterinstallis$2,135.00.ThisparcelisalsosubjecttoaSpecialAssessmentDistrict.TheEastRentonInterceptorfeeis$316.80perlot.Paymentofthesefeeswillberequiredpriortoissuanceoftheutilityconstructionpermit.Allplatsshallprovideseparatesidesewerstubstoeachbuildinglotpriortorecordingoftheshortplat.D.FINDINGSOFFAa:Havingreviewedthewrittenrecordinthematter,theCitynowentersthefollowing:1.Request:Theprojectproponenthasrequestedapprovalofashortplatof83,428squarefeet(1.92acres),locatedintheHighlandsDistrict,intotwo(2)lots,suitablefordevelopmentwithsingle-familyERCandShortPlatReport—Campbell CityofRentonOeportmentofCommunity&EconomicDevelopmentEnvironmentalReviewCommitteeReportCAMPBELLSHORTPLATLUAIS-000239,ECF,SHPL-AReportofJune22,2015Page14of16residentialstructures,onecriticalareastract,andoneshareddrivewaytract.Theprojectwouldhaveadensityof4.08dwellingunitspernetacre.2.ApplIcation:Theproperty,locatedatSWCorneroftheintersecitonofNE9°’StandAnacortesAveNE(APN1023059095),isownedbyKentonChurchoftheNazarene.3.ComprehensivePlan:ThepropertyhasaComprehensivePlanlandusedesignationofResidentialSingleFamily(KS).TheproposedprojectfurtherstheobjectivesandpoliciesoftheKSsectionoftheLandUseElementoftheComprehensivePlan.4.ZonIng:ObjectivesandpoliciesoftheKSdesignationareimplementedbystandardsandregulationsoftheResidential8zone.Theprolect,asproposed,meetsorexceedstheR-8standardsandregulationsifallconditionsaremet.5.SubdivisIonRegulations:Theshortplat,asproposed,wouldmeettherequIrementsofChapter4-7RMC,SubdivisionRegulationsifallconditionsofshortplatapprovalsetforthbelowaremet.6.ExIstingLandUses:Vacant.7.Setbacks:Minimumbuildingsetbackrequirementswouldbemet8.S’jstemDevelopmentCharges:Thecurrentsurfacewatersystemdevelopmentcharge(SDC)feeis$1,350.00pernewlot.Feesarepayablepriortoissuanceoftheconstructionpermit,andthefeeratethatiscurrentatthetimeofissuanceoftheutilityconstructionpermitwillbeapplicable.9.PublIcUtilities:Impactstopublicservicesareassessedonasingle-familydwellingunitbasis;itisnotanticipatedtheprojectwouldresultinimpactstoutilitiesifalltheconditionsofapprovalaremetandthefeesarepaid.Thecurrentfeefortransportationimpactsis$2,214.44persingle-familydwelling;thecurrentfeeforparksis$1,441.29persingle-familydwelling;thecurrentfeeforschoolsis$5,541.00persingle-familydwelling;andthecurrentfeeforfireis$495.10persingle-familydwelling.Theidentified2015feeratesareeffectivefromJanuary1,2015throughDecember31,2015.CityofKenton2016developmentfeesbecomeeffectiveJanuary1,2016.10.Schools:TheprojectsiteislocatedwithintheRentonSchoolDistrict(RSD),whichencompassesapproximately35squaremiles.StudentswouldattendHoneyDewElementarySchool,McKnightMiddleSchool,andHazenHighSchool.RSDhasindicateditwouldbeabletohandletheimpactoftheadditionalstudentsestimatedtocomefromtheproposeddevelopment.11.SafeRoutestoSchools:TheKentonSchoolDistrictwillbusallstudentstoandfromthemiddleschool.Theelementaryschoolandthehighschoolhavebeenidentifiedasbeingwithinwalkingdistance.Thereisanidentifiedsafewalkingroutetotheelementaryschoolandthehighschool.E.CONCLUSIONS:1.ThesubjectsiteisdesignatedResidentialSingleFamily(RSJintheComprehensiveLandUsePlanandcomplieswiththegoals,objectives,andpoliciesestablishedwiththisdesignation.2.ThesubjectsiteiszonedResidential8(R-8)andcomplieswiththezoninganddevelopmentstandardsestablishedwiththisdesignation,providedtheapplicantcomplieswiththeKentonMunicipalCode,advisorynotesandconditionsofapprovalcontainedherein.3.Theproposed8iotshortplatcomplieswiththesubdivisionregulationsasestablishedbyRentonMunicipalCodeandstatelaw,providedtheprojectcomplieswithadvisorynotesandconditionsofapprovalcontainedherein.4.TheproposedshortplatcomplieswiththestreetstandardsasestablishedbyKentonMunicipalCode,providedtheprojectcomplieswithadvisorynotesandconditionsofapprovalcontainedherein.ERCandShortPlatReport—Campbell CityofRentonDeportmentofCommunity&EconomicDevelopmentEnvironmentalReviewCommitteeReportCAMPBELLSHORTPLATLUAIS-000239,EU,SHPL-AReportofJune22,2015Page15of16F.DECISION:TheCampbellShortPlat,FileNo.LUA15-a00239,ECF,SHPL-Aisapprovedsubjecttothefollowingconditions:1.TheapplicantshallcreateandrecordaNativeGrowthProtectionEasement(NGPE)fortheareacontainedwithinthewetlandandassociatedbuffersoverCriticalAreaTractApriortoorconcurrentwithshortplatrecording.EachownerofLots1and2shallhaveafractionalinterestintheCriticalAreasTractinordertoprotecttheTractinperpetuity.2.TheapplicantshallberequiredtoreviseandresubmittheLandscapePlantoshowaminimumof10feetofon-sitelandscapingonLot1alongthepublicstreetfrontageandtwotreesinthefrontyardofLot2.TheplanshallbesubmittedforreviewandapprovalbytheCurrentPlanningProjectMahagerpriortotheissuanceoftheconstructionpermitforon-siteutilities.3.TheapplicantshallprovideashareddrivewayapproachtoTractBthatshallbenocloserthanfivefeet(5’)totheeastpropertylineinordertoretainenoughroomforthedrivewayapproachapron,roadmaintenance,aprivacyfence,andonsitelandscapescreening.Theadditionalareaontheeastsideoftheshareddriveway,betweentheeastpropertylineandtheedgeofthepavement,shouldnotimpactthe2-lotshortplatsabilitytomaintaincompliancewithRentonMunicipalCode.4.Theapplicantshallinstallawoodsplit-railfencewithwetlandsignagealongtheedgeofTractA.Thewoodsplit-railfenceshallincludetheproposedgroupoftreestoberetainedatthenorthwestcorneroftheproperty.Suchasplit-railfenceshallbeconstructedpriortotherecordingoftheshortplat.ArequirementtomaintainthefencebyaHomeowners’Associationorsimilarentityshallbeplacedonthefaceoftheshortplat.5.Theapplicantshallprovideaccesstoeachlotfromtheproposedshareddriveway(TractB).Anotetothiseffectshallbeplacedonthefaceoftheshortplatpriortorecording.6.TheapplicantshalllocatetheexistingluminairepoleatcornerofAnacortesAveNEandNE9thSttobewithintheproposed8-foot-wideplanterstripatcornerofAnacortesAveNEandNE9thSt.7.TheapplicantshallcomplywiththerecommendationscontainedintheGeotechnicalEvaluationpreparedbyGeospectrumConsultants,Inc.datedMarch11,2015(oranupdatedreportsubmittedatalaterdate)duringsiteandbuildingconstruction.8.TheapplicantshallberequiredtosubmittothePlanReviewerforreviewandapproval,arevisedfinaldrainagereportandassociatedplans,basedonthe2009KingCountySurfaceWaterDesignManual(asamendedbytheCityofRenton)priortoconstructionpermitapproval.DECISIONONLANDUSEACTION:SIGNATURE:JenniferHenning,PlanningDirectorDateDepartmentofCommunity&EconomicDevelopmentTRANSMITTEDthis22nddayofJune2015totheContact/Applicant/Owner(s):Owner(s):ApplicantContact:RentonChurchoftheNazarenePeterSt.PierreTomReddingP0Box2640ForestContractingLLCEncompassEngineering&SurveyingRentonWA9805627038233rdP/SE165NEiuniperSt.,Suite201MapleValley,WA98038lssaquah,WA98027ERCandShortPlotReport—Campbell CityofBentonDepartmentofCommunity&EconomicDevelopmentEnvironmentalReviewCommitteeReportCAMPBELLSHORTPL4TLUAIS-000239,ECF,SHPL-AReportofJune22,2015Page16of16TRANSMITTEDthis2tdayofJune2015tothePartiesofRecord:PeterStPierreStephenChowChadAllenPacificPeakConstructionServicesInc.862BremertonAveNEEncompassEngineering&Surveying4004NE19thStRenton,WA98059165NEJuniperSt.,Suite201Pentan,WA98056lssaquah,WA98027lcsifMishkovRentanChurchofNazarene2471S224thSt850UnionAveNEDesMoines,WA98198Benton,WA98056TRANSMITTEDthis2t’dayofJune2015tothefollowing:JanConklin,DevelopmentServicesCE.“Ch4fVincent,CEDAdministratorVanessaDolbee,CurrentPlanningManagerSteveLee,DevelopmentEngineeringManagerPlanReviewFireMarshal6.LANDUSEAaloNAPPEALS,REQUESTFORRECONSIDERATION,&EXPIRATIONTheEnvironmentalDeterminationandtheAdministrativeShortplatReviewdecisionswillbecomefinalifthedecisionsarenotappealedwithinthe14-dayappealperiod[RCW43.21.C.075(3);WAC197-11-680)].EnvironmentalDeterminationAppeal:AppealsoftheenvironmentaldeterminationmustbefiledinwritingtotheHearingExamineronorbefore5:00p.m.July10,2015.AdministrativeShortPlatApprovalAppeal:AppealsoftheadministrativesitedevelopmentplanreviewdecisIonmustbefiledInwritingtotheHearingExamineronorbefore5:00p.m.onJuly10,20Th.APPEALS:Theabovelandusedecisionswillbecomefinalifnotappealedinwritingtogetherwiththerequiredfeeto:HearingExaminer,CityofRenton,1055SouthGradyWay,Renton,WA98057.RMC4-8-110governsappealstotheHearingExaminerandadditionalinformationregardingtheappealprocessmaybeobtainedfromtheCityClerk’sOffice,RentonCityHall-7thFloor,(425)430-6510.RECONSIDERATION:Within14daysofthedecisiondate,anypartymayrequestthatthedecisionbereopenedbytheapprovalbody.Theapprovalbodymaymodifyhisdecisionifmaterialevidencenotreadilydiscoverablepriortotheoriginaldecisionisfoundorifhefindstherewasmisrepresentationoffact.Afterreviewofthereconsiderationrequest,iftheapprovalbodyfindssufficientevidencetoamendtheoriginaldecision,therewillbenofurtherextensionoftheappealperiod.Anypersonwishingtotakefurtheractionmustfileaformalappealwithinthe14-dayappealtimeframe.EXPIRATION:TheAdministrativeShortPlatapprovalwillexpiretwo(2)yearsfromthedateofdecision.Asingleone(1)yearextensionmayberequestedpursuanttoRMC4-7-070.M.THEAPPEARANCEOFFAIRNESSD0aRINE:providesthatnoexparte(privateone-on-one)communicationsmayoccurconcerningthelandusedecision.TheDoctrineappliesnotonlytotheinitialdecision,buttoAppealstotheHearingExamineraswell.Allcommunicationsafterthedecision/approvaldatemustbemadeinwritingthroughtheHearingExaminer.Allcommunicationsarepublicrecordandthispermitsallinterestedpartiestoknowthecontentsofthecommunicationandwouldallowthemtoopenlyrebuttheevidenceinwriting.AnyviolationofthisdoctrinecouldresultintheinvalidationoftheappealbytheCourt.ERCandShortPlotReport—Campbell 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—fln4flfln——an..-4F-4lJW—F_n————___In—4_______c——C._.__—__F_,n_.__-————-C—————4-—-C4-4fl-4b.s..4fl4..4Wbnl.p—.4.I4I—I‘-4”——————-S..—ma—____-4444-4*4*44-4-414-4w—-C—,_———4—-—4——-t’:=..tts--tt-4—-C--————4.1=...———-C-—-n_n__nfl-_fll—-4-4-4-44-4•4!F-44——F-4_n———4————-——____-—antzt-r--z4-fl——.—14411qM,.,..,—......—q——-4—FCc—I———n1C1nnfl.—lC4.14.1..a.....ø.C4n—bSlm—C—C144-4*144-4——-——————p——,‘Z’.1b7.tt———....-.—..—_n4—-—C—--:,-4Zn.--t=t’==r===sl—444.k..dwL..—.———-————t._———...4b...C.*...‘‘———CCamr-irr4-an.e,———.b..4-4-4.—._—_—___.,____1—___4_In————4•__•__—----4—F—-C————..-4-4-4nPflI’-44-444-44-4wa.’—,.—.__—._————-4_fl—p—q—___—___.__—__.——-4—————_._————FPF4———-_•_—I—-4In——4a•-44_4_4-4-4444-4-44-4-4-4—-41t-4W-C-44.4P-4Pflfl‘——4———4—_______________—._a__n-.1__.___.—p—.4-•I4CflC._—.4——._——_-w_—-4Fw—_nFCaj——OI——Ct—I_C.———-4-444_C—••—IC—4I4-4-4-4_nb-awbC.d•1-4—‘4*•4n4-4—,1441-4——-4—-C_-.see®_____flnnn4.._-&I-L_.4_.-—(al;)1IyJCGNUNV1d-S—37faq)11VL209fleHSfl4IVSNCD©;a_n.i—an—4—.4.—--—-4fl____‘a-Cnn__—.—__—__.__——__I.—.b’ba-4—4t__-44_—I-—.á.n._b-C._np4——an-445fla.—4-4—a———-C-——-pahA——p414-4Is_nC444-4-4—-4•_pCI————•.1nan—t——.n———*1-4———a——‘-4-4-4-4-4——4._n.___.p_n*—-4——_-4__,_—p_n——-C-n.-4_-——————-4.—__C_n-4——-4fl—————-4———.——*1-44-4—an—fl_n—4-—,——.-4_.C.Ia-C_a9NCISVDIIeiSNOILDn&jcNOM’4)ThV43CnL0r arboristsNwLLCwww.arbor1stsnW.ComRO.Box909EntireDocumentMercerIsland,WA98040gealAvailableUponRequest(206)779-2579ForestContracting(206)255-9893IhavepersonallyinspectedthetreeslocatedattheCampbellsubdMsionsouthofthecornerofNE9and&Anacortes,RentonWA,Kingcountparcelnumber1023059095asyourequested.AInternationalSocietyofArboriculturelevel1limitedvisualmethodwasused.ThemapsuppliedwiththeproposednewhomesgenerallocationswasusedtoaidIndetermininganypossibleimpactonthetrees.Acountwasmadeofthetrees6”OSH“DiameteratBreastHeight’andlargerintheareaoutsideofthewetlanddesignatedpieceoftheparcel.Thetotalwas135,withRedAlderrepresentingthemajorityinthebO%rangewithwildCherrynextCottonwood,Douglasfir,Hazelnut,PacificwillowandarowofSamboo(thisspeciesgrowingontheNorthsideoftheparcelhavinggrownfromundertheneighboringproperty).Blackberryvinesdominatetheunderstorytoadepthof30’alongthestreetfrontageintotheparcel.Severalofthetreesarestumpsproutedfromsomeearliercuttingborderingtheneighboringpropertyonthatnorthside.OfthespeciesonsiteallbuttheDouglasfircouldbetermedyoungtreeswiththefirsbeinginthe30-40yearoldrangetheremainderinthe10-15yearoldrange.OvercrowdingwouldbemyopiniononthewholesitewithagaintheDouglasfirbeingabovethecompetitionforlight.Theovercrowdingasidethetreesonsiteappeartbbeingoadhealth.ThelargeststandofDouglasfirisinthefarsoutheastcorneroftheparcel.ToaddressanypossibleconflictbetweenthetreesandtheproposedhomesthereareDouglasfirsthatlooktoneedtheirrootsystemsprotected.IfIhavethelocationofthehomescorrect2Douglasfirsnorthofthebuildingsiteclosesttothestreetandonelargerfiralongthefencelineeastofthesecondhome,thebackbuildingsitewillbeaffected.Itisthissecondfirthatappearstobetheclosesttothenewhome.TherearesmallertreesalsotobeaffectedbutastheyaretheRedAlderandtheysonumemusIhavenotaddressedthemhere.LINealBakerArboristsNW.comISACertPN1O7SAISArreeRiskAssessmentQualifiedPNWISAC1RA#867MemberAREA&SOCAEXHIBIT8 EntireDocumentAvailableUponRequestAltrnannOliverAssociates,LLCAOAI‘C)IIU%7$4,iu,i.iii.,p,.V\’ISI)ithu.1ili5,fl1iili—LU’)lnuroiiiiicntaIl’l;iuiiiiuig4I.J[ldSCapeiiIiiLet:tillJanuary29,2015AOA-3860PeterSt.PierrePacificPeakConstructionServicespeter@paciflcpeakcs.comSUBJECT:WetlandReconnaissanceforMackenzieLaneShortPlat;Renton,WA(Parcel102305-9095)DearPeter:OnJanuary28.2015IconductedawetlandreconnaissancethroughouttheeasternportionofthesubjectpropertyutilizingthemethodologyoutlinedintheMay2010RegionalSupplementtotheCorpsofEngineersWetlandDelineationManual:WesternMountains,Valleys,andCoastRegion(Version2.0).TheprimarypurposeofthereconnaissancewastoconfirmthatthewetlandboundaryandclassificationasdelineatedbyAlderNWin2008remainedvalid.AlderNWdelineatedoneCategory2wetland(WetlandA)throughoutthecentralandsouthwesternportionofthesite.Thewetlandboundariesweresubsequentlysurveyed(seesurveydrawing)andthedelineationwasdocumentedinanAugust26,2008report(AttachmentA).Basedontherecentsitereview,thesurveyedwetlandboundaryappearstoremainaccurateandare-delineationdoesnotappearwarranted.Inaddition,theclassificationofthewetlandasaCategory2wetlandhasalsonotchanged.Category2wetlandsintheCityofRentoncurrentlyrequireastandard50-footbuffer.ProposedProiectItismyunderstandingthattheproposedprojecthasbeenreducedfroma4-lotshortplattoa2-lotshortplatandthatpreviouslyproposedbufferaveragingisnolongeracomponentoftheproject.The50-footbufferintheeasternportionofthesiteadjacenttheproposeddevelopmentcurrentlyconsistsofanativemixedforestandnoplantingisrequired.EXHIBIT9 :CEOSPECTRUMC(Y4SULTANfl.IiNCrp___ _ _——t-r‘c]r’J’Xfcfl7:?aJt’CIin-Jflt’:r:’March11,2015EntireDocumentAvailableUponRequestMr.PeterSt.PierreForestContracting27018233PlaceSERenton,WA98038SUBJECT:GEOTECHNICALEVALUATIONProposedCampbellShortPlatKCPN1023059095,4400BlockNE9thStreetRenton,WashingtonProjectNo.15-107-01DearPeter,Thisreportpresentstheresultsofourgeotechnicalevaluationforthesiteofyourproposednewresidentialdevelopmentonthesubjectproperty.Thepurposeofourworkwastoprovidegeotechnicalengineeringevaluationsofthesiteincludingstormwaterinfiltrationfeasibilityandgeotechnicalrecommendationsfortheresidentialdevelopmentincludingdesignoffoundations,sitegrading,sitedrainageanderosioncontrol.OurworkwasperformedinaccordancewiththescopeandconditionsofourproposaldatedMarch2,2015.Asitetopographicmapandshortplatplan(seeFigure2)wasprovidedtousandwasusedasareferenceforourevaluations.Basedonourreviewoftheplanprovidedanddiscussionswithyou,weunderstandthatthepropertywillbedividedinto2lotsplusTractA(wetlands)andTractB(stormwater/utilities).Weassumethattheresidentialdevelopmentwillincludeanew2-to3-storywoad4rameresidenceoneachofthenewlots.Thestructuresareexpectedtoincludegroundlevelgarageswhichwillhaveslab-on-gradefloorsandtheremainderofstructuresmayhaveraisedfloorswithcrawlspaceorslab-on-grade.Weassumethatbearingwallloadswillbeintherangeofabout2to3klfandmaximumcolumnloadstobeintherangeofabout10to20kips.Ifactualstructuralloadsexceedtheabovevaluesbymorethan25%,thisofficeshouldbenotified.ReviewoftheRentononlineSensitiveAreasMapsindicatesthatthepropertyisnotindicatedtobewithinaSteepSlopeHazard,LandslideHazard,ErosionHazard,SeismicHazardorCoalMineHazardarea.EXHIBIT10 EncomQass\ENGINEERING&SURVEYINGAvailableUponRequestPRELIMINARYTECHNICALINFORMATIONREPORTforCampbellShortHutApril7,2015PreparedForPacificPeakConstruction3004NEj9ihStreetRenton,WA98056EXHIBIT11VcsIernWiishingtoiiDIvisnn165NE!JuniperSt.Ste201,Issaquali,WA98027Phone:(125)392-0250I’ax:(125)391-3055Eustci’nWashingtonDivision407SwiftwatorSIvd,dcFlurn,WA98922Plionc:(509)674-7133Fax:(509)674-7419EntireDocumentEncompassEngineeringJobNo.155174I7www.EncompassES.net NII‘CUi CAMPBELLSHORTPLATCONSTRUCTIONMITIGATIONDESCRIPTIONProposedconstructionstartdatewillbeapproximatelyinSummer/Fall2015andcompletionwillbeinapproximatelytwomonths.Hoursofoperationwillhewithinthepermitteddineof7:00A.M.to8:00P.M.MondaythroughFriday.ProposedhaulingltransportationroutewillbenorthonMacortesAveNE,westonNE10thSt.toUnionAveNE.Haulingwillbewithintherestrictedhoursof8:30A.M.and3:30P.MMondaythroughFriday.Watertrucks,streetsweepersandanyotherrequirementsdeemednecessarywouldbeimplementedforanyimpactsthatmayoccur.Therewillbenoanticipatedweekend,latenightoranyotherspecialtyhoursproposedforconstructionorhaulingatthistime.Hagpersonswillbeemployedandsignswillbeinstalledfortrafficcontrolwhennecessary.EXHIBIT13 RECOMMENDEDROUTESAREMARKEDWITHARRoWS:Thismapsshowsthepmftnedrousforwalki,igtoschoolsafely.PleaseshowyotwChIldthesafestroulnandInchthemgoodsafetyhabit,,nhas:1.tostopateverycornerandlookallwaysforoncomingvahIcesbeforecroslng2.towflqtikldbutdon’trimwhencrossingstreets;a.tousecrnsswalb,slopsigns,trafficsignals,schoolpatrols,andadultcrossingguardsi4.whe’enowalkwaysareprovided,walkontheleftsideoftheroadwayasfroffthbaveiledpartoftheroadwayaspossible,lcIngapproachIngtraific;S.towearbrightcfothing,EXHIBIT14HoneydewElementary-WalktoSchooiRouteOptionsais-1!4112 ADVISORYNOTESTOAPPLICANTApplicationDate:April10,2015SiteAddress:SWCorneroftheintersecitonofNE9thStName:CampbellShortPlatandAnacortesAveNE,Renton,WA98059Plan—PlanningReviewEngFneerihgRevfewCbmments..Karnrgmvazdidcostr.425430338ZFkyazd1dodstrenWnwa.gov’Recommendations:EXISTINGCONDITIONSWATERWaterservicewillbeprovidedbytheCityofRenton.SEWERSewerservicewillbeprovidedbytheCityofRenton.STORMThereisnoformalstormconveyancesysteminNE7thStreetSTREETSTherearenofrontageimprovements.CODEREQUIREMENTSWATERTheproposeddevelopmentiswithintheCity’swaterserviceareaandintheHighlands565hydrauliczone.ThedevelopmentisoutsideoftheCity’saquiferprotectionareas.Thereisanexisting8inchwatermain(seeCitywaterprojectplanno.W2107)inNE9thSt.The8inchlinecandeliver2,000gallonsperminute(gpm).Thestaticwaterpre5sureisabout63psiatelevationof416feet.ThereisanexistingfirehydrantatthesouthwestcornerofNE9thStandBremertonAveNEwhichcandeliver1,000gallonsperminute.ThehydrantIsmorethan300feetawayfromthenewsoutherlylot.Thefollowingwaterimprovementswillberequiredtoprovidewaterservicefordomesticuseandforfireprotectionforthesubjectdevelopment:1.Installationof1Inchminimumdomesticwaterservicelineandmetertoeachlot.2.Installationofanadditionalfirehydrantwithin300feetofeachlotifrequiredbyRentonFirePreventionDepartmentand/oriftheproposedsinglefamilydwellingswillexceed3,600sqftofgrossarea.3.Thedevelopmentissubjecttoapplicablewatersystemdevelopmentchargesandwatermeterinstallationsfeebasedonthesizeofthemeters.4.Civilplansforthewatermainextensionwillberequired.SANITARYSEWER1.SewerserviceisprovidedbytheCityofRenton.Thereisanexisting8inchsewermaininNE9THStreetTheapplicantcanconnectdirectlytotheainchmainseweratNE9THstreet.2.Thedevelopmentissubjecttoawastewatersystemdevelopmentcharge(SOC)fee.TheSDCfeeforsewerisbasedonthesizeofthenewdomesticwatertoservethenewhomeoneachlot.Thesewerfeefora‘/.inchor1inchmeterinstallis$2,135.00.3.ThisparcelissubjecttoaSpecialAssessmentDistrict.TheEastRentonInterceptorfeeis$316.80perlot.Paymentofthesefeeswillberequiredpriortoissuanceoftheutilityconstructionpermit.4.Allplatsshallprovideseparatesidesewerstubstoeachbuildinglotpriortorecordingoftheplat.SURFACEWATER1.AdrainageplananddrainagereportdatedApril7,2015wassubmittedbyEncompassEngineeringandsurveying.Theproposed2lotsubdivision,zonedR8,issubjecttoFullDrainageReviewinaccordancewiththe2009KingCountySurfaceWaterManualandCityofRentonAmendmentstotheKCSWM,Chaptersland2.BasedontheCity’sflowRan:June08,2015EXHIBIT15Page1of7 ADVISORYNOTESTOAPPLICANTIEngineeringReviewComments,conUnue&KamranVazdidoost425-43(3-7381c9azdrdoast@rentonwa4ovcontrolmap,thissitefallswithintheFlawControlDurationStandard,ForestedCondition.FlowcontrolaMPSrequiredforthisprojectperCityofRentonAmendmentstoKingCountyStormWaterDesignManualsection1.2.3.3.2.Thesubmitteddrainagereportincludesthe8corerequirements,butincludesonly5specialrequirements.Thespecialrequirement#6regardingaquiferprotectionareaneedstobeincludedinthedrainagereport(TIR)submittedwiththeutilityconstructionpermit.3.WaterqualityisnotrequiredforthisprojectperKingCountyStormWaterDesignManualAmendedbyCityofRentonsection1.2,8.SincethetotalproposedPGISislessthan5000SF.4.FulldispersionisproposedintheplansforlotlandtractAandbasicdispersion/limitedinfiltrationisproposedforlot2.Fulldispersion,basicdispersionandlimitedinfiltrationmustbedesignedandlocatedperCityofRentonAmendmentstoKingCountyStormWaterDesignManualsectionsC.2.landC.2.4and5.4.DetentionisnotrequiredforthisprojectperKingCountyStormWaterDesignManualAmendedbyCityofRentonsincethedevelopmentofthisprojectwillresultinlessthan0.1CFSincreaseofthe100yearrunoff,5.Ageotechnicalreport,datedMarch11,2015wassubmittedbyGeospectrumConsultantsInc.Thefieldstudyincluded4explorationpitsonthelS2acresite.Theseexplorationpitsweredugupto6.5feetInnative’ssoil.Nogroundwaterwasencounteredonexplorationpitsnumber1,2and3butseepagewasobservedat2.5foot.Fillsoilsencounteredinexplorationpitnumber3about3foot.SoiltypeencounteredisGlaciationTill(OCT).Thegeotechnicalreportrecommendedfulldispersion,basicdispersionandlimitedinfiltrationmethodsforBMP.Thegeotechnicalreportrecommendsfulldispersionforlot1,tractBandbasicdispersion/limitedinfiltrationforlot2.6.Surfacewatersystemdevelopmentfeeis$1,350.00pernewlot.Feesarepayablepriortoissuanceoftheconstructionpermit.TRANSPORTATION/STREET1.ExistingrightofwaywidthinNE9thStreetis30feet.Thisstreethasbeenidentifiedasaresidentialaccessstreet.TomeettheCity’snewcompletestreetstandards,streetimprovementsfrontingthissitewillinclude16feetofpavement,an8footplanterstrip,5footsidewalk,0.5footcurb,andgutter.2.A20feetwidejointaccess/utilityeasementroadproposed.Lots1and2willgetaccessviathisroad.3.TrafficImpactFees,Transportationimpactfeeisapplicableonsinglefamilyhousesbasedontheapplicablerateatthetimeofbuildingpermitandpaymentisdueatthetimeofissuanceofthebuildingpermit.4.Thecurrenttransportationimpactfeerateis$2,214.44pernewsinglefamilyhome.Thetransportationimpactfeethatiscurrentatthetimeofbuildingpermitapplicationwillbelevied.Paymentofthetransportationimpactfeeisdueatthetimeofissuanceofthebuildingpermit5.TomeettheCity’snewcompletestreetstandards,streetimprovementsfrontingthissitewillinclude16feetofpavement,an8footplanterstrip,5footsidewalk,0.5footcurb,andgutter.6.Allelectrical,phone,andcableservicesandlinesservingtheproposeddevelopmentmustbeunderground.TheconstructionofthesefranchiseutilitiesmustbeinspectedandapprovedbyaCityofRentoninspectorpriortorecordingtheplat.7.MailboxlocationsshallbeapprovedbythePostOffice.8.PavingandtrenchrestorationwillcomplywiththeCity’sTrenchRestorationandOverlayRequirements.GENERALCOMMENTS1.Separatepermitsandfeesforwater,sewerandstormconnectionswillberequired.2.Allconstructionutilitypermitsfordrainageandstreetimprovementswillrequireseparateplansubmittals.AllutilityplansshallconformtotheRentonDraftingStandards.AlicensedCivilEngineershallpreparethecivilplans.3.Rockeriesorretainingwallsgreaterthan4feetinheightwillberequireaseparatebuildingpermit.Structuralcalculationsandplansshallbesubmittedforreviewbyalicensedengineer.SpecialInspectionisrequired.Ran:June08,2015Page2of7 ADVISORYNOTESTOAPPLICANTEnglneertngRevlewCamments1coñflhüéXamrthnYazdldoost[42$63U-738Zj.kyazdIdcot@reünwá.gØv4.Atreeremovalandtreeretention/protectionplanandaseparatelandscapeplanshallbeincludedwiththecivilplansubmittal.PLANREVIEWRECOMMENDEDCONDITIONS1.FlowcontrolSNIPSrequiredforthisprojectperCityofRentonAmendmentstoKingCountyStormWaterDesignManualsection1.2.3.3.2.ACityofRentonPublicUtilityeasementisrequiredovertheentireprivateroad.3.Thespecialrequirement#6regardingaquiferprotectionareasshouldbeincludedinthedrainagereportsubmittedwiththeutilityconstructionpermit4.FoundatIonofnewbuildingmustpenetratethroughtheexistingtilltobearonundisturbedverydense/hardnaturalsoils.Buildingmusthaveconventionalspreadfootingtosupporttheproposedstructures.5.Planterstripmustbecontinuedtoproposeddriveway.6.Existingsidewalkateastsideofproposeddriveway(Northeastcorner)mustberemovedandrelocatedtoalignwithproposedsidewalkatwestsideofproposeddriveway.7.LuminairepolelocatedatcornerofAnacortesAveNEandNE9thStmustberelocatedtoproposedplanterstripatcornerofAnacortesAveNEandNE9thST.FtriReur&s-Bultdkgcomthentt.Comà6Z5-437O2EëthornasmortwagOvRecommendations:EnvironmentalImpactComments:1.Thefireimpactfeesarecurrentlyapplicableattherateof$495.10persinglefamilyunitCodeRelatedComments:1.Thefireflowrequirementforasinglefamilyhomeis1,000gpmminimumfordwellingsupto3,600squarefeet(includingga?ageandbasements).ifthedwellingexceeds3,600squarefeetaminimumof1,500gpmfireflowwouldberequired.AminimumofonefirehydrantisrequiredwIthin300feetoftheproposedbuildingsandtwohydrantsifthefireflowgoesupto1,500gpm.Existinghydrantscanbecountedtowardtherequirementsaslongastheymeetcurrentcodeincluding5inchstortfittings.Aminimumofonenewhydrantshallberequiredastherearenohydrantswithin300feetofLot2.2.Firedepartmentapparatusaccessroadwaysarerequiredtobeaminimumof20feetwidefullypaved,with25feetinsideand45feetoutsideturningradius.Fireaccessroadwaysshallbeconstructedtosupporta30tonvehiclewith75psipointloading.Accessisrequiredwithin150feetofallpointsonthebuildings.PoliceReviewCommentsCyndleParksI425-43O7521cparks@rentonwa.govRecommendations:Minimalimpactonpoliceservices.-Recommendations:Streettrees—useonlyspeciesthatwillachievealargematuresizeandnotPersicaparrotla.Useonlytwostreettreesspaced50’on-centerand30’fromstreetlight.Reduceproposalfromfourstreettreestotwo.ParksimpactfeesperOrdinance5670applies.JCommunityServicesCommentsLeslieBetlachI4254306619Ilbetlachrentonwa.govRan:June08,2015Page3of7 ADVISORYNOTESTOAPPLICANTLUA1S-000239ITechnicatsenkesCommentsSabMaiOthe[i$437369Fbmoñie@ráiflnñwa.éowRecommendations:ShortPlat:BobMacOnle04/30/2015NotetheCityofRentonlanduseactionnumberandlandrecordnumber,LUA1S000239andLND2O0621,respectively,onthefinalshortpiatsubmittal.ThededicationofrightofwayforshortsubdivisionsrequiresaseparateDeedofDedication;provideaspacetotherecordingnumberofsameontheshortplat.TheDeedofDedicationdocumentincludesbothalegaldescriptionexhibitandamapexhibitofthededicatedparcel.Thelegaldescriptionexhibitshouldbeprepared,stamped,datedandsignedbytheapplicant’ssurveyor.ThesurveyorshouldalsopreparethemapexhibitThededicationprocessrequiresanupdatedPlatCertificatedatedwithin45daysofapprovalofsaiddedication.TalktotheProjectManageriftherearequestionsorfurtherinformationisneeded.ShowonthedrawingthesecondtietotheCityofRentonSurveyControlNetwork(Mon#1849),andnotewhatwasfound.AlsonoteMonumentNumber1848onthedrawing(lowerlefthandcorneroftheshortplatsubmittal).Bothofthesemonumentsarenotedunderthe“RENTONCONTROLMONUMENTS”block,butarenotspecificallyreferencedonthedrawing.Providesufficientinformationtodeterminehowtheplatboundarywasestablished.Provideshortplatandlotclosurecalculations.Noteontheshortplatdrawingwhatwassetatthecornersoftheproposedlots.Currently,whatwassetIsnotedunderthe“LEGEND”block,butthesymbolisnotshownonthedrawing.Notediscrepanciesbetweenbearingsanddistancesofrecordandthosemeasuredorcalculated,ifany.Thecitywillprovideaddressesfortheproposedlotsassoonaspossible.Notesaidaddressesonthefinalshortplatdrawing.PlanningReviewCommentsClarkClose[42533J-7289I:cclose@rentohwagcv.Recommendations:-1.RMCsection44030.C.2limitshaulhoursbetweeneightthirty(8:30)a.m.andthreethirty(3:30)p.m.,MondaythroughFridayunlessotherwiseapprovedinadvancebytheDevelopmentServicesDivision.2.Newsinglefamilyandothernonresidentialconstructionactivitiesshallberestrictedtothehoursbetweenseveno’clock(7:00)a.m.andeighto’clock(8:00)p.m.,MondaythroughFriday.WorkonSaturdaysisbypermissiononly.NoworkIspermittedonSundays.3.Withinthirty(30)daysofcompletionofgradingwork,theapplicantshallhydroseedorplantsappropriategroundcoveroveranyportionofthesitethatisgradedorclearedofvegetationandwherenofurtherconstructionworkwilloccurwithinninety(90)days.Alternativemeasuressuchasmulch,sodding,orplasticcoveringasspecifiedinthecurrentKingCountySurfaceWaterManagementDesignManualasadoptedbytheCityofRentonmaybeproposedbetweenthedatesofNovember1standMarch31stofeachyear.TheDevelopmentServicesDivision’sapprovalofthisworkIsrequiredpriortofinalinspectionandapprovalofthepermit.4.ANationalPermitDischargeEliminationSystem(NPDES)permitisrequiredwhenmorethanoneacreisbeingcleared.Ran:June08,2015Page4of7 ADVISORYNOTESTOAPPLICANTTechnicalgervlcesCommentsi,contlnue&>BabMacOnleF425-480-flGaIbmacon[etentanwa.gav.Notealleasements,covenantsandagreementsofrecordonthedrawing.A17.5footeasementrecordedunderRec.No.8006240435(shownalongthesouthlineofTractAandLot2ofthesubjectshortplat)issaid“tobevacated”(inthefuture?).Thistransmission/distributionlinewasgrantedtoPugetSoundPowerin1980.Issaideasementtobevacatedbeforetheshortplatisrecorded?Whatisit’sstatus?A10footutilityeasement,recordedunderRecNo.8109020545forCityofRentonutilities,isshownalongthenorthlineofTractAandLot1ofsaidshortplat.ItisnotedthatsaideasementwasnotnotedontheunderlyingLotLineAdjustmentrecordedunderRecNo.200402129000008.Alfootutilityeasement,recordedunderRecNo4043986forPugetSoundPower,isalsoshownalongthenorthlineofsaidTractAandsaidLot1,butwasnotnotedonsaidunderlyingLotLineAdjustment.Removeallpointdesignations(“WF17”,“WFlS”,etc.)shownonTractA.Removeallcatchbasininformation,sanitarysewermanholeinformation,gaslines,waterlines,sewerlines,sidewalks,verticalcurbs,etc.fromtheshortplatsubmittal.Saiddataisnotrelevantforshortplatrecording.Noteanyrelevantresearchedresourcesontheshortplatsubmittal.Notethatthepropertytothewestofthesubjectshortplatis“UNPLAUED”.Removethebuildingsetbackslines.Setbackswillbedeterminedwhenbuildingpermitsareissued.TheCityofRentonAdministrator,PublicWorksDepartment,istheonlycityofficialwhosignsthefinalshortplat.Provideanappropriateapprovalblockandsignatureline.PertinentKingCountyapprovalblocksalsoneedtobenotedonthedrawing.Includeadeclarationblockonthedrawing,titled“OWNERS’DECLARATION”not“CERTIFICATION”orother.Allvestedowner(s)ofthesubjectfinalshortplatneedtosignthefinalshortplatdrawing.Includenotaryblocksasneeded.TheTicorTitleCompanytitlereport,perGuarantee/certificateNo.70020273,datedMaréh18,2015,statesthatthesubjectshortplatsiteisvestedinFredandDonnaAlberts.TheCityofRentonLandUsePermitMasterApplicationnotestheRentonChurchoftheNazereneasthepropertyowner.TheshortplatsubmittalnotesPacificPeakConstructionReviewasthepropertyowner(perContract).Reviewallandresolveasneeded.RemovethePropertyOwner,Engineer/Surveyor,Zoning,ProposedNetDensityandMax.AllowableDensitydatafromtherighthandsideofthesubjectsubmittal.RemovetheCityofRenton“SEAL”fromtheupperrighthandcornerofthesubmittal.The“VICINITYMAP”notes“MONROEAVENE”tothewestofthesubjectsite.Saidstreetshouldbenotedas“UNIONAVENE”.“UNIONAVENE”isshowneastofthesubjectsiteandsouthofNE4thSt.ItappearsthatNE4thStisplacedRan;June08,2015PageSof7 ADVISORYNOTESTOAPPLICANTLUA15000239—2tLnDTechnkalServlcesCommentscontlflued-BobMaconlaF4Zs#O7369Ibmacañ1erentohwa.gotooclose(onthemap)underthesubjectsite.Addanortharrowtothe“VICINITYMAP”.Reviewandalterasneeded.BecausethesubjectpropertyfallswithinZone2oftheCityofRentonAquiferProtectionArea,theAquiferProtectionNoticeneedstobenotedonthedrawing.AQUIFERPROTECTIONNOTICEThelotscreatedhereinfallwithinZone2ofRenton’saquiferprotectionareaandaresubjecttotherequirementsoftheCityofRentonOrdinance#4367.Thiscity’ssolesourceofdrinkingwaterissuppliedfromashallowaquiferunderthecitysurface.Thereisnonaturalbarrierbetweenthewatertableandgroundsurface.Extremecareshouldbeexercisedwhenhandlingofanyliquidsubstanceotherthanwatertoprotectfromcontactwiththegroundsurface.Itisthehomeowner’sresponsibilitytoprotectthecity’sdrinkingwater.Notethatifthereareeasements,restrictivecovenantsoragreementstoothers(CityofRenton,etc.)aspartofthissubdivision,theycanberecordedconcurrentlywiththefinalshortplat.Thefinalshortplatdrawingandtheassociateddocument(s)aretobegiventotheProjectManagerasapackage.Therecordingnumber(s)fortheassociateddocument(s)aretobereferencedonthefinalshortplatdrawing.Providespacesfortherecordingnumbersthereof.Theneweasementsforingress,egress,utilities,etc.shownforthebenefitoffutureownersoftheproposedlotseachneedanotedefiningtherightsassociatedwiththeeasementatissue.Sincethesenew“proposed”easementsshownaren’t“grantedandconveyed”untilthebenefitedand/orburdenedlotsareconveyedtoothersaddthefollowinglanguageonthefaceoftheshortplatdrawing:DECLARATIONOFCOVENANT:Theownersofthelandembracedwithinthisshortplat,inreturnforthebenefittoaccruefromthissubdivision,bysigninghereoncovenantandagreetoconveythebeneficialinterestinthenewprivateeasementsshownonthisshortplattoanyandallfuturepurchasersofthelots,orofanysubdivisionsthereof.Thiscovenantshallrunwiththelandasshownonthisshortplat.Theprecedingstatementobligatesthesellerofthelotscreatedto“expresslygrantandconvey”thelots“togetherwithand/orsubjectto”anynewprivateeasementsdelineatedontheshortplatintheconveyingdocument.Theprivateingress,egressandutilityeasementrequirea“NewPrivateEasementforIngress,EgressandUtilitiesMaintenanceAgreement”statement.Includethefollowingstatementontheshortplat:NATIVEGROWTHPROTECTIONEASEMENTTheNativeGrowthProtectionEasement(NPGE)onthisshortplatidentifiesthesteepslopes.ThecreationoftheEasementconveystothepublicabeneficialinterestinthelandwithintheEasementArea.Thisinterestshallbeforthepurposeofpreservingnativevegetationforthecontrolofsurfacewateranderosion,maintenanceofslopestability,visualandauralbuffering,andprotectionofplantandanimalhabitat.TheEasementimposesuponallpresentandfutureownersandoccupiersoftheEasementareaenforceableonbehalfofthepublicbytheCityofRenton,toleaveundisturbedalltreesandothervegetationwithintheEasementarea.ThevegetationwiththeEasementareamaynotbecut,prunedcoveredbyfill,removedordamagedwithoutexpresswrittenpermissionfromtheCityofRenton,providedhowever,thattheownersofunderlyingpropertymayinstalllandscaping.Therightofentryhereinshallapplytotheagents,representativesandemployeesoftheownersorsubsequentownersoftheunderlyingproperty.Ran:June08,2015Page6of7 ADVISORYNOTESTOAPPLICANTTechnicalServicesComments)continuedBObMacOnieI425-43a-736gLbmaonie@’tentonwa.govIncludethefollowingontheshortplatTRACTNOTESA‘Tract’islandreservedforspecifieduses,including,butnotlimitedtoreservetracts,recreation,openspace,criticalareas,surfacewaterretention,utilityfacilitiesandaccess.Tractsarenotconsideredbuildingsitesforthepurposesofresidentialdwelling.Tract‘A’isaWetlandandStormDrainagetract.AneasementisherebygrantedandconveyedtotheCityofRentonover,underandacrossTract‘A’forthepurposeofconveying,storing,managingandfacilitatingstormandsurfacewaterpertheengineeringplansonfilewiththeCityofRenton.TheCityofRentonhastherighttoentersaidstormwatereasementforthepurposeofinspecting,operating,maintaining,improving,andrepairingit’sdrainagefacilitiescontainedtherein.Tract‘A’issubjecttoaNativeGrowthProtectionEasementasdefinedhereon.Development,alteration,ordisturbancewithinthetractisprohibitedexceptforpurposesofhabitatenhancementaspartofanenhancementprojectwhichhasreceivedpriorwrittenapprovalfromtheCity.Ran:June08,2015Page7of7 —————————————————a a SECTION3OFF-SITEANALYSIS ProjectOverviewThisprojectinvolvesthedevelopmentofavacant1.92acreparcelintotwosingle-familylotsinzoningR-8.Theparcelisvacantanditismostlycoveredwithheavyvegetationwithsignificanttrees.Thesitegenerallyslopesdowntosouthwestatapproximately1004±.PertheSCSSoilmaps,thesiteisunderlainwithMdenvood,gravellysandyloam(AgC).ThisisconfirmedintheattachedGeotecimicalEvaluationpreparedbyGeospectmmConsultantsInc.ThesouthwestoftheparceliscoveredwithwetlandcategoryIT.-Seeattachedreports.UpstreamDrainageUndeterminedupstreampropertiestothenorth,westandsouthofthesiteappeartointotheonsitewetland.Thiswillhavenoimpactonthedevelopmentofthisproject.DownstreamDrainageThedevelopableportionofthenortheastportionofthesitedrainssouthwesttotheonsitewetland.Runofffromthewetlanddrainsintoand18-inchstormpipelocatedatthesouthpropertyline(A).This18-inchstormsystemdrainssouthacrosstheballfieldoftheadjacentschoolgrounds(B),collectioninaCBlocatedadjacenttothenorthsideofNE8thStreet(C),andthensouthwesttothesouthsideofNE8thStreet(D),about500-feetdownstreamfromtheprojectsite.The18-inchstormsystemcontinuessouthbetweenhouses,crossingNE7EhPL(E)andbecoming24-inchpipe.Thepipecontinuessouth,thenwest(F)toalargewoodedpond/wetland(0),another600-feetdownstream.Flowsexistthepondsouthcontinuingthroughawoodedstreamareatowellbeyond¼miledownstreamfromtheprojectsite.Therewerenoapparentdownstreamdrainageproblems. -‘.o.’-a-?/r113Ja SECTION4FLOWCONTROLANDWATERQUALITYFACILITYANALYSTSANDDESIGN DrainageDesignBecausethedevelopmentofthisprojectwillresultinlessthan0.1CFSincreaseofthe100-yearrunoffasestimatedusingtheKCRTScomputermodelpertheRentonstandards,detentionisnotrequired.Acombinationofhillandbasicdispersionwillbeused,dischargingtowardstheonsitewetland.-SeeattachedKCRTSAnalysis S —————————————a a a c t)(‘, cc (p P ‘I II ‘I p 0r :3 c3 ci r V -,——-4-i-, -a’<-C o tJC C 4a.D‘I C’c0 -l.J f07CI’-)-—tame 14J. cc (1- .fl -ng p, •r S•u.c otj u’;;‘0.‘—‘CM USC.) •C.) US 7 -00o•‘0C_fl —I’.)C.a ‘cia ‘000 C[a‘5- 0 1 N iv’ ‘6 4%I II ci -1 cc’ ‘I -o tj C I I,-Thu\\1Vii -4 r SI’ —4 r r 0 1 C -í z V C’ 4I! CM 0 0 CM0I>>m rr00fl?C C mz0-a P1 -C 0 a-C ‘I 0 c.l N z C., 0 P1 0 S. N 5, S F’ ——————L_J J —————a flhE sj’1 11 1. tJ II —Cc 1% a m —4:.I’., UI z 00 - —. o —L%J -cno t%J C cI’) .0‘0 C ‘000 Clà-a 7J o1# a nCUi4 t It -J -—1. (M U. ,U?0)<— §P H t U ci — 1k F‘p 0:. HLJ - •I I—I p.1 hi C.4 -4 4’ q 41j1z t-ss.lw——&ITh- __I - Si it- 4I e(ltThe_ ‘1 -J * 11 0 -7 N, -4!- - —li.-.-——— -r ‘S2‘%4,.r‘c_4 ‘ v-_i ‘ z E[{-EE n !ta — J_L5 “fluU’.\I’ C,,0 0 00I>I 0>en en 0r00enCenrz0-°0 en-C 0 0-C 0 0 0 en en LETE F 1 EncompassEngineering&SurveyingEasternWashingtonDivision407SwifiwaterBlvd..CleElum,WA98922Phone(509)674-7433Fax(509)674-7419hWesternWashingtonDivision165NEJuniperSt.Suite20!,Tssaquah,WA98027Phone(425)382-0250Fax(425)391-3055TH--JOBSHEETNOOF_CALCULATEDBY_____________________________DATECHECKEDBYDATESCALELoft/r’scr13Fv’cAc%voc9*-PczVtIbdYt-eCTr2AcTj)(-pVM94*Z,ZtLt..*V%€S50’U,jc(fl3onnb:j—Mu..milDwp%1-I‘9aEsø”764fl)1CO’fttMñL.5èocw5&sOt(J&o’4VrpL7af)vpyszoo‘+EAZ-5so3___15cco1tt.A’Ilot,-’¶ltc$V’fr5fl,1HHHH--J_iLi—tRotNo0D0I&fl’iJ —————————a —a ————a I I —_Th_l_-_- 1 ‘a 21c_)3-c n7l —cp E ‘4’ It,’ oi1 c I? t o c -3 •_Lfl.,, g :i;H; tJl&20 wP cc0 _- tile C ftI-i cz ft -aPUt CI) ‘C 1 1i-4 ft 0> C mU 0-C o 011 In -Q -t * p-‘3 1 C,,00xInr0m In0 0-C F -i 4% r 0 0 In KCRTSExistingConditionsPeaksFlowFrequencyAnalysisTimeSeriesFile:15517u.tsfProjectLocation:Sea—Tac———AnnualPeakFlowRates———FlowFrequencyAnalysiFlowRateRankTimeofPeak——Peaks——RankReturnProb(CFS)(CFS)Period0.03822/09/0118:000.0491100.000.990Qoo.Ejc0.01071/06/023:000.038225.000.9600.02842/28/033:000.029310.000.9000.00183/24/0420:000.02845.000.8000.01761/05/058:000.02453.000.6670.02931/18/0620:000.01762.000.5000.024511/24/064:000.01071.300.2310.04911/09/089:000.00181.100.091ComputedPeaks0.04550.000.980KCRTSDevelopedConditionsPeaksFlowFrequencyAnalysisTimeSeriesFile:15517d.tsfProjectLocation:Sea—Tac———AnnualPeakFlowRates———FlowFrequencyAnalysisFlowRateRankTimeofPeak——Peaks——RankReturnProb(CFS)CCFS)Period0.06242/09/012:000.1351100.000.990Q100.DEV0.04061/05/0216:000.076225.000.9600.07622/27/037:000.066310.000.9000.03288/26/042:000.06245.000.8000.040710/28/0416:000.06053.000.6670.06631/18/0616:000.04062.000.5000.060511/24/063:000.04071.300.2310.13511/09/086:000.03281.100.091ComputedPeaks0.11550.000.980AQ100Q100DEv—QiooEx0.135—0.049=0.086<.1CFS SECTION5CONVEYANCESYSTEMANALYSISANDDESIGN SECTION6SPECIALREPORTSANDSTUDIES GEOSPECTRUMCONSULTANTS,INC..:*I.#GeotechnicalEngineeringandEarthSciencesMarch11,2015Mr.PeterSt.PierreForestContracting27018233’PlaceSERenton,WA98038DearPeter,GEOTECHNICALEVALUATIONProposedCampbellShortPlatKCPN1023059095,4400BlockNE9thStreetRenton,WashingtonProjectNo.15-107-01Thisreportpresentstheresultsofourgeotechnicalevaluationforthesiteofyourproposednewresidentialdevelopmentonthesubjectproperty.Thepurposeofourworkwastoprovidegeotechnicalengineeringevaluationsofthesiteincludingstormwaterinfiltrationfeasibilityandgeotechnicalrecommendationsfortheresidentialdevelopmentincludingdesignoffoundations,sitegrading,sitedrainageanderosioncontrol.OurworkwasperformedinaccordancewiththescopeandconditionsofourproposaldatedMarch2,2015.Asitetopographicmapandshortplatplan(seeFigure2)wasprovidedtousandwasusedasareferenceforourevaluations.Basedonourreviewoftheplanprovidedanddiscussionswithyou,weunderstandthatthepropertywillbedividedinto2lotsplusTractA(wetlands)andTractB(stormwater/utilities).Weassumethattheresidentialdevelopmentwillincludeanew2-to3-storywood4rameresidenceoneachofthenewlots.Thestructuresareexpectedtoincludegroundlevelgarageswhichwillhaveslab-on-gradefloorsandtheremainderofstructuresmayhaveraisedfloorswithcrawlspaceorslab-on-grade.ReviewoftheRentononlineSensitiveAreasMapsindicatesthatthepropertyisnotindicatedtobewithinaSteepSlopeHazard,LandslideHazard,ErosionHazard,SeismicHazardorCoalMineHazardarea.SUBJECT:IIIIWeassumethatbearingwallloadswillbeintherangeofcolumnloadstobeintherangeofabout10to20kips.Iftheabovevaluesbymorethan25%,thisofficeshouldbeabout2to3klfandmaximumactualstructuralloadsexceednotified.PCBox-276.!ssaquah,WA98027-0276Phone(425)3914228Fax125)3Q14228 ForestContractingMarch11,2015SCOPEOFWORKOurgeotechnicalevaluationincludedreviewofgeologicmapping,siteexplorations,engineeringanalysesandevaluationsandthepreparationofthisreport.Thescopeofworkincludedthefollowingspecifictasks:oReviewofpublishedgeologicmappingandUSDAsoilmappingofthesitevicinity.oPerformedareconnaissanceofthesite.oObservedandloggedfourtestpitexplorationsonthesite(seeFigure2)todepthsupto6feetbelowexistingground.LogsofthetestpitsandresultsoffieldandlaboratorytestingarepresentedintheTestPitsummariesofAppendixA.oPerformedgeotechnicalengineeringevaluationsofinfiltrationfeasibilityandtheproposedsitedevelopmentanddevelopedourgeotechnicalrecommendationsforinfiltrationfoundationdesignandsitegrading.oPreparedthisgeotechnicalreportsummarizingourfindingsandrecommendations.OBSERVEDSITECONDITIONSThepropertyisborderedonthenorthandeastbydevelopedresidentiallots(and9thStreetNE)onthesouthbyanexistingplayfieldandonthewestbyundevelopedland.Atthetimeofourfieldexplorationthepropertywasun-developedasshowninFigure2.ThetopographicmappingincludedonthesiteplanofFigure2indicatesthattheproposednewlotsareagenerallyslopesgentlytoverygentlydowntothewest/southwestatgradientsthatrangefromonlyabout3to17percentandtheremainderoftheproperty(approximatelythewestern213)isnearflat.Thesitewaswellvegetatedwithprimarilyaldertreeswithoccasionalevergreentreesandunderstorythatincludedgrasses,salal,andblackberries.Wedidnotobserveanyseepsorspringsorevidenceofcurrentorpasterosiononthesite.Wedidhoweverobservestandingwaterwithintheareaofthemappedwetland(TractA).ProjectNo.15-107-01Page2 ForestContractingMarch11,2015SubsoilsOurevaluationofthesubsurfaceconditionswasbasedonourobservationsofthreeexploratorytestpitswithintheproposedeasternnewlotareaplusafourthtestpitwithinTractBaswellasreviewofpublishedgeologicmappingandUSDAsoilmapping.ApproximatelocationsofthetestpitsareshownonFigure2.LogsofthetestpitsarepresentedinAppendixA.Subsoilsencounteredinourtestpitswerefoundtoincludesomeminorfillandnaturalglaciallyconsolidatedsoils.FillsoilswereencounteredinTP-3locatedatthenorthwestquadrantofLot1.Fillsoilsweresiltyveryfinesandwithoccasionalgravelandwereonlyabout3feetthickatthatlocation.Naturalsoilsencounteredatthetestpitlocationsweregenerallysiltyfinetoveryfinesandwithoccasionalgravel.AtTP-2weencounteredastrataofsandysiltsoilsatadepthofabout2.5feetwhichextendeddowntothehardcementedsoils.Theuppersoilsweretypicallyloosetodepthsofabout2to3feetbelowthenaturalsurfacebecomingmediumdense,denseandverydensetohardandcementedatdepthsofabout3to4feetbelowthenaturalsurface.GroundWaterNogroundwaterorseepagewasobservedinanyofthetestpitsontheproposedLots1and2,butred-brownmottlingwasobservedinTP-1onLot2atdepthsof3to4feetandgroundwaterseepagewasobservedatadepthofabout2.5feetinTP-4withinTractB.Typicallytheshallowsoilswereclassifiedasmoisttoverymoistandthedeepercementedsoilswereclassifiedasmoist.Themeasuredmoisturecontentsofthesoilsgenerallyrangedfromabout13to22percentwithintheuppersoils.SubsurfaceVariationsBasedonourexperience,itisouropinionthatsomevariationinthecontinuityanddepthofsubsoildepositsandgroundwaterlevelsshouldbeanticipatedduetonaturaldepositionvariationsandpreviousonsitestructuresandgrading.Duetoseasonalmoisturechanges,groundwaterconditionsshouldbeexpectedtochangewithtime.Careshouldbeexercisedwheninterpolatingorextrapolatingsubsurfacesoilsandgroundwaterconditionsbetweenorbeyondourtestpits.ProjectNo.15-107-01Page3 ForestContractingMarch11,2015SITEEVALUATIONSGeneralThereferencedgeologicmapofFigure1indicatesthesitevicinitytohavesurfaceexposuresofglacialtill(Qgt)soils.TheQgtglacialtillsoilsarehighlyconsolidated,heterogeneousmixturesofsand,silt,clayandgravelsoilsdepositedduringtheadvanceoftheVashonglaciation,thelastglacialadvanceintothePugetSoundarea,approximately13,000to16,000yearsago.Basedonthesoilsobservedonthesiteandreviewofthereferencedmap,itisouropinionthatthenaturalsoilsunderlyingthepropertyandareglaciallyconsolidatedtilldeposits(Qgt).Basedontheresultsofourfieldinvestigationscombinedwithourownexperienceandjudgmentitisouropinionthatthegeotechnicalsiteconditionsaresuitablefortheproposeddevelopmentprovidedourrecommendationsarefollowed.HazardAssessmentLandslide:TheRentonSensitiveAreasMapsindicatethesiteisnotwithinaLandslideHazardarea.Inaddition,thegeologicmapofFigure1indicatesnomappedlandslideswithinthesitevicinityandoursiteobservationsindicatethesiteiscurrentlystable.Consideringthegentletoverygentleslopegradientsandtheobservedglacialtillsoils,itisouropinionthatthepotentialforfutureinstabilityonthesiteisverylowtonil.Erosion:TheRentonSensitiveAreasMapsindicatethesiteisnotwithinaErosionHazardarea.Weobservedthatthesiteiswellvegetatedweobservednoindicationofanyseepageorconcentratedwaterfloworcurrentorpasterosiononthesite.Basedonoursiteobservationsandexplorationsitisouropinionthatthereisnounusualerosionriskatthissiteandanypotentialerosionpotentialresultingfromdevelopmentwillbemitigatedbyourrecommendedgradingproceduresanddrainage/erosioncontrolmeasuresandbyfinalre-vegetation/landscapingincorporatedintotheproposeddevelopmentplans.CoalMine:TheRentonSensitiveAreasMapsindicatethesiteisnotwithinaCoalMineHazardarea.Seismic:ThePugetSoundregionisaseismicallyactivearea.Abouti7+moderatetolargeearthquakes(MStoM7+)haveoccurredinthePugetSoundandnorthwesternCascadesregionsince1872(143years)includingthe2/28/01M6.8Nisquallyearthquakeanditisouropinionthattheproposedstructureswillverylikelyexperiencesignificantgroundshakingduringtheirusefullife.ProjectNo.15-107-01Page4 ForestContractingMarch11,2015Basedonarecentlypublishedstudythesiteliesonlyabout2milessouthofthesouthernmappedlocationoftheSeattlefaultandabout19milessouthwestoftheestimatedtraceoftheSouthWhidbey-LakeAlicefaultbothofwhichhavepostulatedmaximumcrediblemagnitudesof7.0to7.5.AnotherrecentstudyoftheVashonTacomaareapresentsevidencefortheeast-westtrendingTacomaFaultwhichisindicatedtopassthroughthesouthendofVashonandthemiddleofMauryIslandabout11milessouthwestofthesite.ThestudysuggeststhattheTacomaFaultandtheSeattlefaultmaybelinkedbyamasterthrustfaultatdepth.TheSeattlefaulthasbeendocumentedtohavemovedatitswestend(BainbridgeIsland)about1000to1100yearsagoandevidenceofmovementattheeastendhasalsorecentlybeendocumented.SomeexpertsfeelthattherecurrenceintervalbetweenlargeeventsontheSeattleFaultmaybeontheorderofseveralthousandsofyearsbutourcalculationsindicateitmaybeontheorderof1200to1400years.TheactivityofthedocumentedTacomafaultisconsideredtobeonthesameorderastheSeattlefault.TherecurrenceofamaximumcredibleeventontheSouthWhidbeyfaultisnotknownbutsomeexpertshaveassignedarecurrenceofabout3000years,howeversmallereventswilloccurmorefrequentlyasevidencedbythe5.3eventonMay2,1996whichwasattributedtothatfault.InadditiontoPugetSoundseismicsources,agreatearthquakeevent(MBtoM9÷)hasbeenpostulatedfortheCascadiaSubductionZone(CSZ)alongthenorthwestPacificcoastofOregon,WashingtonandCanada.ThecurrentriskofafutureCSZeventisnotknownatthistime.PublishedreportshaveindicatedrecurrenceintervalsforaCSZeventtorangefromaslittleas100-200yearstoaslongas1000+yearsandthetimeofthelasteventisreportedtohavebeenabout315yearsago.Consideringalloftheabove,itisouropinionthattheproposedstructureswillverylikelyexperiencesignificantgroundshakingduringtheirusefullife.The2012InternationalBuildingCode(IBC)adoptedbytheCityofRentonrequiresthataMaximumConsideredEarthquakeGeometricMean(MCE0)groundmotionpeakhorizontalgroundacceleration(PGA)beusedforsiteliquefactionevaluationsbutthattheIBCDesignEarthquakewhichisdefinedas2/3oftheMCEGgroundmotionsmaybeusedforconsiderationinothergeotechnicalseismicsiteevaluationsfornewconstruction.TheMCEcPGAofthe2012IBCisbasedonconsiderationofbothprobabihsticgroundmotionswitha2415-yearrecurrenceintervalanddeterministicgroundmotionsbasedonamodelofknownfaultlocationsandcharacteristicsadjustedforsitespecificsoilconditions.Persection1803.5.12(2)ofthe2012IBC,wehaveestimatedtheMCE0PGAforthissitetobeabout0.57ginaccordancewithSection11.6.3ofASCE7-10.WeestimatetheIBCDesignEarthquakegroundmotionPGAforthissitetobe0.38g.PleasenotethattheDesignEarthquakegroundmotionPGAisnotintendedforstructuralanalyses.Spectralaccelerationsperthe2012IBCshouldbeconsideredinstructuraldesign.ThissiteisconsideredtobeaSiteClassDpertheIBCdefinitions.ProjectNo.15-107-01Page5 ForestContractingMarch11,2015Secondaryseismichazardsduetoearthquakegroundshakingincludeinducedslopefailure,liquefaction,lateralspreadingandgroundsettlement.Consideringtheverydense/hardnatureofthesoilsrecommendedforbearingatthesite,itisourevaluationthatthepotentialfordamagetothestructuresduetoliquefaction,lateralspreadingandsettlementisverylowtonil.Thepotentialforseismicallyinducedshallowfailuresisalsoconsideredverylowtonil.StormWaterInfiltrationFeasibilityFeasibilityofstormwaterinfiltrationwasevaluatedinaccordancewiththeKingCountySurfaceWaterDesignManual(KCSWDM)AppendixC-SmallProjectDrainageRequirementscriteria.SectionC.2.2.2,1a)ofKCSWDMAppendixCstatesthattheinfiltrationsoils“cannotbecomprisedoffillmaterials”andSectionC.2.2.2,1b)ofKCSWDMAppendixCstatesthatthedepthto“themaximumwetseasonwatertableorhardpanmustbeatleast3feet’.SectionC.2.2.2requiresthenaturalsoilsforFullInfiltrationmustbeclean“coarsesandsorcobblesormediumsands”howeverSectionC.2.3.2allowsLimitedInfiltrationinto“finesands,loamysands,sandy(camsorloams”.Naturalpermeablesoilsencounteredatthetestpitlocationsweregenerallyclassifiedassiltyfinetoveryfinesandwithoccasionalgravelandwereunderlainbyverydensetohardandcementedimpermeableglacialtillsoilsatdepthsof3to4feetbelowthenaturalsurface.AtTP-2weencounteredasandysiltstrataatadepthofabout2.5feetwhichextendeddowntothehardcementedsoils.Theuppersoilsweretypicallyloosetodepthsofabout2to3feetbelowthenaturalsurfacebecomingmediumdensetodense.AtTP-4withinTractBweencounteredgroundwateratadepthof2.5feet.ReviewofUSDAsoilsurveymappingofthesitevicinityindicatesthesitetoexposeAlderwoodgravellysandyloamsoils(AgC).TheAlderwoodsoilsaredescribedasgravellysandyloamto7inchesandverygravellysandyloamfrom7to59incheswithgroundwaterorrestrictivelayerat20to39inches.Consideringtheabovecriteriaandthefactthatnocleancoarsesands,cobblesormediumsandswereencounteredatanyofthetestpits,inouropinionthegeneralsiteisnotsuitableforFullInfiltrationperthecriteriaofKCSWDMAppendixC.Howeverweobserved3to4feetofpermeablenaturalsiltyfinetoveryfinesandsoilsabovetheimpermeablehardcementedsoilsatallofthetestpitlocationsontheproposednewLots1and2andinouropinionLimitedInfiltrationisfeasibleonLots1and2perthecriteriaofKCSWDMAppendixC.ThreefeetoffillwasencounteredatTP-3onLot1butweobserved3feetofnaturalpermeablesoilsbeneaththefillandoverlyingthehardcementedsoilsatTP-3,thereforethatlocationalsomeetstheminimumcriteriaforLimitedInfiltrationprovidedthatinfiltrationsystemsareplacedwithinthenaturalsoils.Consideringthatgroundwaterwasencounteredatadepthofonly2.5feetatTP4inTractB,itisouropinionthatthesubsoilconditionsatTractBdonotmeettheaboveProjectNo.15-107-01Page6 ForestContractingMarch11,2015referencedrequirementsofKCSWDMAppendixCforstormwaterinfiltrationandisthereforeinfiltrationonTractBisnotconsideredfeasible.Allinfiltrationsystemsshouldbeconstructedatleast1footabovethesurfaceoftheimpervioushardcementedsoillayersencounteredinourexplorationspertherequirementsofSectionC.2.2.2ofthe2009KCSWM.Ifthereisinadequateavailablespaceonthesiteforlimitedinfiltrationofallonsitestormwaterrunoff,dispersionBMPmethodsmaybeusedperSectionsC.2.1andC.2.4ofthe2009KCSWMwiththeexceptionthatwedonotrecommendtheuseofsplashblocks(C.2.4.2).Inadditionwerecommendthatrockpads(C.2.4.3)andgravelfilleddispersiontrenchesshouldbelocatedatleast15feetinthedownslopedirectionawayfromthestructure.Finalgradesaroundthestructureshouldbeslopedtodrainawayfromthestructureanddispersiontrenchesshouldbeplacedsothatthedispersedstormflowwillnotbedirectedtowardsthestructureorotherneighboringstructures.StructureSupportConsiderationsInouropiniontheundisturbedverydense/hardnaturalglacialtillsoilsencounteredinourexplorationsshouldprovidegoodsupportfortheproposedstructurefoundations.Bearingsoilsareexpectedtobeencounteredatdepthsrangingfromabout2to3.5feetbelowthenaturalgroundsurfaceatthesite.Foundationsshouldpenetratethroughanyexistingfill,topsoilandloose/mediumdensesoilstobearonundisturbedverydense/hardnaturalsoils.Conventionalspreadfootingsareconsideredappropriateforsupportoftheproposedstructuresconsideringthatbearingsoilsareatshallowdepths.However,ifanydeepfillareasareencounteredonthesite,leanconcretefootingextensionsorpipepilescouldbeusedtotransferfoundationloadstothedeepbearingsoilsinthoseareas.Wehaveincludedrecommendationsforspreadfootingsandpipepilesinthisreport.RECOMMENDATIONSThefollowingsubsectionspresentourrecommendationsfordesignoffoundations,retainingwalls,sitegrading,drainagecontrolanderosioncontrol.Alsoincludedarerecommendationsforplanreviewandobservationsandtestingduringconstruction.SpreadFootingFoundationsConventionalspreadfootingsfoundedonundisturbedverydense/hardnaturalglacialtillsoilsshouldprovidegoodsupportfortheproposedstructures.Bearingsoilsareexpectedtobeencounteredatdepthsrangingfromabout3to4feetbelowthenaturalgroundsurfaceofthesite(belowanyfillsoilsonthesite).ProjectNo.15-107-01Page7 ForestContractingMarch11.2015Continuouswallfootingsshouldbeatleast18incheswide.Squarefootingsforcolumnsupportshouldbeatleast24incheswide.Footingssupportedonundisturbedverydense/hardnaturalglacialtillsoilsmaybedesignedbasedonanallowablebearingpressureof2000psf.Allfootingsshouldbefoundedatleast18inchesbelowthelowestadjacentfinalgrade.Wherethenaturalbearingsoilsslope,thefootingexcavationshouldbesteppedtomaintainahorizontalbearingsurface.Ifdeepfillorotherunsuitablesoilsareencountered,foundationloadsmaybetransferredfromtherecommendedminimumfoundationdepthstotherecommendedverydense/hardbearingsoilsbyamonolithofleanconcretehavingaminimumcompressivestrengthof1000psi.Thewidthofanun-reinforcedleanconcretemonolithshouldbeatleastaswideasthefootingoratleastone-thirdofthemonolithheight,whicheverisgreater.Reinforcedmonolithsshouldbedesignedbyastructuralengineer.Asuitablewidthtrenchshouldbeexcavatedwithasmoothedgedexcavatorbucket(noteeth)toexposethedense/verydensebearingsoilsunderobservationbyourofficeandbackfilledassoonaspossiblewiththeleanconcretetothefootingelevation.Theestimatedsettlementofaproperlyconstructed18-inchwidecontinuousfootingcarryingaloadof3kipsperfootisontheorderof1/4to1/2inch.Ourseftlemehtestimatesassumethatfoundationsaresupportedonundisturbedverydense/hardnaturalbearingsoilsandthatallfillandloose/disturbedmaterialisremovedfromthebearingsurfacepriortoconcretepour.Maximumdifferentialsettlementwithintheproposedstructuresisexpectedtobe1/2inchorless.Settlementsareexpectedtooccurprimarilyduringconstruction.Resistancetolateralloadscanbeassumedtobeprovidedbyfrictionactingatthebaseoffoundationsandbypassiveearthpressure.Acoefficientoffrictionof0.45maybeassumedwiththedeadloadforcesincontactwithon-sitesoils.Anallowablestaticpassiveearthpressureof250psfperfootofdepthmaybeusedforthesidesoffootingspouredagainstundisturbedmediumdensenaturalsoilsorproperlycompactedstructuralfill.Anallowablestaticpassiveearthpressureof150psfperfootofdepthmaybeusedforthesidesoffootingsorgradebeamspouredagainstexistingloosesoils.Theverticalandlateralbearingvaluesindicatedaboveareforthetotaldeadloadplusfrequentlyappliedliveloads.Forshortdurationdynamicloadingcausedbyseismicorwindforces,theverticalbearingvaluesmaybeincreasedby50percentandallowablelateralpassivepressuresmaybeincreasedby33percent.ProjectNo.15-107-01Page8 ForestContractingMarch11,2015RetainingWallsCantileveredretainingwallsasreferredtointhisreportarewallswhichyieldormoveoutwardduringandafterbackfilling.Actualwallmovementswilldependonthewalldesignandmethodofbackfilllingandcanrangefrom0.1%to0.3%ofthewallheight.Designpressuresforcantileveredwallsgivenbelowassumethatthetopofthewallwilldeflectatleast0.15%ofthewallheight.Designofwallfoundationsshouldbeinaccordancewiththerecommendationspresentedinthisreport.Staticdesignofpermanentcantileveredretainingwallswhichsupportahorizontalsurfaceofproperlycompactedcleanfree-draininggranularmaterialmaybebasedonanequivalentfluiddensityof40pcf.Thesepressuresassumethatthereisnowaterpressurewiththewallbackfill.Anadditionaluniformlateralpressureduetobackfillsurchargeshouldbecomputedusingacoefficientof0.27timestheuniformverticalsurchargeload.Staticdesignofwallssupportinghorizontalbackfillandstructurallybracedagainstmovementshouldbebasedonanequivalentfluiddensityof60pcf.Thispressureassumesthatthewallsupportsahorizontalbackfillofproperlycompactedfree-draininggranularmaterialandthatthereisnowaterpressurebehindthewall.Uniformlateralpressureduetoauniformverticalsurchargebehindabracedwallshouldbecomputedusingacoefficientof0.43timestheuniformverticalsurchargeload.Seismicdesignofretainingwallsshouldincludeadynamicsoilloading.Dynamicsoilpressureshouldbeassumedtohaveaninvertedtriangulardistribution.Basedona0.38gIBCgroundmotionlevelthedynamicsoilpressureatthetopofthewallshouldbeatleast25H(psf)whereHistheheightofthewallabovethefootingbase.Thedynamicsoilpressureshoulddiminishlinearlytozeroatthebaseofthewall.CombinedstaticplusdynamicsoilpressureshouldbeusedforseismicdesignofthewaIIs.Careshouldbeexercisedincompactingbackfillagainstretainingwalls.Heavyequipmentshouldnotapproachretainingwallscloseenoughtointrudewithina1:1linedrawnupwardfromthebottomofthewall.Backfillclosetowallsshouldbeplacedandcompactedwithhand-operatedequipment.Recommendationsforplacementandcompactionofstructuralfillarepresentedunder“SiteGrading”.Designwallpressuresgivenaboveassumenowaterpressurebehindthewall.Werecommendthatadrainagezonebeprovidedbehindallwallsandaadequatedrainsystembeprovidedatthebaseofthewalls.Walldrainsshouldconsistofafour-inchdiameterperforatedPVCdrainpipeplacedinatleastonecubicfootofdraingravelperlinealfootalongthebaseofthewall.Draingravelshouldbewashedmaterialwithparticlesizesintherangeof3/4to1-1/2inches.Asaminimum,thedrainagezonewithintheupperwallshouldconsistofaMiradraindrainagematorequivalentattachedtothewallsurfaceforthefullheightandProjectNo.15-107-01Page9 ForestContractingMarch11,2015embeddedintothedraingravelatthebaseofthewall.Asanalternativeasanddrainagezonecouldbeplacedthefullheightofthewallwithahorizontalwidthequaltoatleast1foot.Backfillwithinthedrainagezoneshouldbeacleansand/gravelmixturewithlessthan5percentfinesbasedonthesandfraction.AmembraneofMirafi140filterfabricorequivalentshouldbeprovidedbetweenthedrainagezonematerialandonsitesiltysoilbackfill.Thedrainagezonebackfillshouldbecappedwith12inchesofsiltysoilstoreducesurfacewaterinfiltration.SiteGradingSitegradingisexpectedtoconsistprimarilyofexcavationforproposedfoundationsandsubgradepreparationforslabandpavementareasandutilitytrenches.Onsitegranularsoilscleanedofdebrisandorganicsareconsideredsuitableforuseingeneralcompactedfillsbutinourexperiencetheonsiteglacialtillsoilswillbemoisturesensitivewithregardtogradingandcompactioncharacteristics.Gradingshouldbescheduledforthelatesummermonthsifpossible.Wetweathergradingmayrequiretheuseofimportedcleangranularfillsoilswhicharemareeasilycompactedathighermoisturelevels.Recommendationsforsitepreparation,temporaryexcavations,structuralfill,subgradepreparation,sitedrainageandtrenchbackfillarepresentedbelow.SitePreQaration:Existingvegetation,debris,fillsoils,andlooseororganicnaturalsoilsshouldbestrippedfromtheareasthataretobegraded.Duringroughgrading,excesssoilsmaybestockpiledforlateruse.Strippinginsubgradeareasisexpectedtoaverageabout1foot.Soilscontainingmorethan1%byweightoforganicsmaybeusedinplanterareas,butshouldnotbeusedforstructuralfill.Stumps,debrisandtrash,plusrocksandrubbleover6inchesinsize,shouldberemovedfromthesite.Subsoilconditionsonthesitemayvaryfromthoseencounteredinourtestpits.Therefore,ourofficeshouldobservethepreparedareaspriortoplacementofanynewfills.TemporaryExcavations:Slopedtemporaryconstructionexcavationsmaybeusedwhereplannedexcavationlimitswillnotundermineexistingstructuresorinterferewithotherconstruction.Wherethereisnotenoughroomforslopedexcavations,shoringshouldbeprovided.Basedonthesubsurfaceconditionsencounteredinthetestpits,itisouropinionthatslopedtemporaryexcavationsmaybemadeverticallytodepthsof4feetorless.Excavationsupto10feetindepthshouldbeslopednosteeperthan1:1withinloose/mediumdensesoilsandnosteeperthan34:1(hohzontal:vertical)withintheunweathered,hardnaturalglacialtillsoils.Itshouldbenotedthatthecontractorisresponsibleforsafetyandmaintenanceofconstructionslopes.Werecommendthatcutsover4feetindepthbecoveredwithvisqueentarptohelpcontrolravellingandsloughing.SurfacedrainageshouldbedirectedawayfromthetopProjectNo.15-107-01Page10 ForestContractingMarch11,2015edgeofcutslopes.Surchargeloadsshouldnotbeallowedwithin5feetofthetopoftheslopeorwithina1:1(horizontal:vertical)planeextendingupfromthetoeofexcavation,whicheverisgreater.StructuralFill:Providedthatsoilmoisturecanbereducedandmaintainednearoptimum,excavatedonsitesoilscleanedoforganicsanddebrismaybeusedforgeneralstructuralfillbuttheonsitesoilsareexpectedtobemoisturesensitiveandduringtherainyseasonthesoilsmaybecometoowetforpracticalcompaction.Thereforeimportedgranularfillsoilsshouldbeusedifmoistureconditionscannotbeadequatelycontrolled.Loosesoils,formworkanddebrisshouldberemovedpriortoplacingfillorbackfill.Structuralfillshouldbeplacedinhorizontalliftsnotexceeding8inchesinloosethicknessandcompactedtoatleast90percentofthemaximumdrydensityasdeterminedbytheASTMD1557testmethod.Importedgranularfillshouldconsistofclean,well-gradedsandandgravelmaterialsfreeoforganicdebrisandotherdeleteriousmaterial.Importedmaterialforwetweathergradingshouldbeasand/gravelmixturewithlessthan5percentfinesbasedonthesandfraction.Slab/PavementSugort:Slabs-on-gradeandpavementshouldbesupporteddirectlyonundisturbeddensenaturalsoilsoronproperlycompactedstructuralfilloverdensenaturalsoils.Whereunsuitablesoils(existingfill,looseandorganicsoils)existatsubgradelevel,subgradepreparationshouldincludeexcavationoftheunsuitablesoilsasrequiredtoexposemediumdensenaturalsoilsortoamaximumdepthof2feet(ordeeperasrequiredtoremoveallorganicsoilswhereorganicsoildepthsexceed2feetbelowfinalsubgrade)andplacementofstructuralfilltofinalsubgradeelevation.Subgradefillshouldbeplacedinaccordancewiththerecommendationsforstructuralfillexceptthatthetop6inchesofthesubgradefillshouldbecompactedtoatleast95percentoftheASTMDl557maximumdrydensityinpavementanddrivewayareas.Itshouldbenotedthatwheretheproposedslabscrossafill/naturalcontactline,therewillbeahighriskofcracking.Riskofcrackingcanbereducedbyplacingconstructionjointsatthecontactandbypropersteelreinforcementoftheslab.Interiorconcreteslabsshouldbeunderlainbyacapillarybreakconsistingofapolyethylenevaporbarrierofatleast6milthickness.UtilityTrenches:Buriedutilityconduitsshouldbebeddedandbackfilledaroundtheconduitinaccordancewiththeprojectspecifications.Beddingmaterialshouldextendfromsixinchesbelowthepipetosixinchesabovethepipe.Whereconduitunderliespavementorslabs-on-grade,theremainingbackfillabovethepipeshouldbeplacedandcompactedinaccordancewiththerecommendationsforstructuralfill,Ifimportedgranularfillisusedfortrenchbackfillitshouldbecappedwith12inchesofonsitesiltysoils.ProjectNo.15-107-01Page11 ForestContractingMarch11,2015DrainageControlSurfacedrainagefromthesiteandadjoiningupslopeareasshouldbecontrolledanddivertedaroundthedevelopmentareainanon-erosivemanner.Adequatepositivedrainageshouldbeprovidedawayfromthestructuresandonthesiteingeneraltopreventwaterfrompondingandtoreducepercolationofwaterintosubsoils.Granularbackfillshouldbecappedwithpavingor6inchesofonsitesiltysoils.Adesirableslopeforsurfacedrainageis2%inlandscapedareasand1%inpavedareas.Roofdrainsshouldbetightlinedintothestormdrainsystem(nodischargeonthegroundsurface)byaseparateandindependentdrainpipe(noconnectiontoanyotherdrainpipes).Apermanentperimeterdrain,independentoftheroofdrainsystem,shouldbeplacedadjacenttothebaseofthecontinuousexteriorfoundations.Thedrainshouldconsistofafour-inchdiameterperforatedPVCdrainpipeplacedinatleastonecubicfootofwasheddraingravelperlinealfootalongthebaseofthefoundations.ThedraingravelzonearoundthepipeshouldbeencapsulatedwithamembraneofMirafi140filterfabricorequivalentbetweenthedrainagezoneandonsitesiltysoils.ErosionControlAlthoughweobservednoevidenceoferosion,onsitesoilsareexpectedtobeerodiblewhendisturbedandexposedtoconcentratedwaterflows.Siltationfencesorotherdetentiondevicesshouldbeprovidedaroundthedownslopesideofthedisturbedsiteareaandsoilstockpileareasduringconstructiontocontrolthetransportoferodedmaterial.Theloweredgeofthesiltfencefabricshouldhave“J”shapedembedmentinatrenchextendingatleast12inchesbelowthegroundsurface.Surfacewaterflowshouldbecollectedinareadrainsandtightlinedtothestormwatersystem,nowatershouldbedischargedonthesiteunlessviaaproperlydesignedandapprovedinfiltration/dispersionsystem.Exposedfinalgradedsoilareasshouldbeplantedimmediatelywithgrassanddeeprootedplants.PlanReviewThisreporthasbeenpreparedtoaidintheevaluationofthissiteandtoassistthearchitect,structuralandcivilengineersinthedesignandconstructionoftheproject.Itisrecommendedthatthisofficebeprovidedtheopportunitytoreviewthefinaldesigndrawingsandspecificationstodetermineiftherecommendationsofthisreporthavebeenproperlyimplementedandtomakeanysupplementaldesignrecommendationswhichmayberequired.ProjectNo.15-107-01Page12 ForestContractingMarch11,2015ObservationsandTestingDuringConstructionRecommendationspresentedinthisreportarebasedontheassumptionthatsoilconditionsexposedduringconstructionwillbeobservedbyourofficesothatanynecessarydesignchangesorsupplementsmaybemade.Foundationexcavationsshouldbeobservedtoverifythattheyexposeundisturbedverydense/hardbearingsoilsandthatexcavationsarefreeoflooseanddisturbedmaterials.Allstructuralfillandslab/pavementsubgradeareasshouldbeobservedbyarepresentativeofthisofficeafterstrippingandpriortoplacingfill.Drainagecontrolsystemsshouldbeobservedbyourofficetoverifyproperconstruction.Properfillplacementandcompactionshouldbeverifiedwithfieldandlaboratorydensitytestingbyaqualifiedtestinglaboratory.CLOSUREThisreportwaspreparedforspecificapplicationtothesubjectsiteandfortheexclusiveuseofForestContractingandtheirrepresentatives.Thefindingsandconclusionsofthisreportwerepreparedwiththeskillandcareordinarilyexercisedbylocalmembersofthegeotechnicalprofessionpracticingundersimilarconditionsinthesamelocality.Wemakenootherwarranty,eitherexpressorimplied.Variationsmayexistinsiteconditionsbetweenthosedescribedinthisreportandactualconditionsencounteredduringconstruction.Unanticipatedsubsurfaceconditionscommonlyoccurandcannotbepreventedbymerelymakingexplorationsandperformingreconnaissance.Suchunexpectedconditionsfrequentlyrequireadditionalexpenditurestoachieveaproperlyconstructedproject.Ifconditionsencounteredduringconstructionappeartobedifferentfromthoseindicatedinthisreport,ourofficeshouldbenotified.Respectfullysubmitted,GEOSPECTRUMCONSULTANTS,INC./6JamesA.DoolittlePrincipalEngineerEnd:Figures1and2AppendixADist:1/Addresseeviaemailelectroniccopy2/EncompassEngineering&Surveyingaiw,,O/(p______________________________________ProjectNo.15-107-01Page13 /:Zc1Jj.•NTaflkTetir(Abanwref:GeologicMapofthe.Renton(iadnnglebyD.R.Mullineaux,USGSMapGQ—405,1965Scale:1”=2000’SITEVICINITYGEOLOGICMAPProposedCampbellShortflatGEOSPECTRUMCONSULTANTS,INC.KcMJ1023059095,4400Blockt9thStI-.Renton,WashingtonCaotechn/colEnGineer/nganc’EarthSciencesProj.No.15—107Date3/15Figure1 ProposedCnpt11ShortPlatKCEfl1023059095,4400BlockNE9thStRenton,WashingtonProj.No.15—1071Date3/15GEOSPECTRUMCONSULTANTS,INC.CootechnicalEngineeringOfla’EcflhSciencesSITEEXPLORATIONPLAN ForestContractingMarch11,2015APPENDIXAFIELDEXPLORATIONOurfieldexplorationincludedasitereconnaissanceandtestpitexplorations.Duringthesitereconnaissance,thesurfacesiteconditionswerenoted,andthelocationsofthetestpitswereapproximatelydetermined.Thetestpitswereapproximatelylocatedusingexistingpropertyboundariesasaguide.TheapproximatelocationsofthetestpitsareshownonFigure2.TestPitelevationswereestimatedbasedonthetopographicmappingshownonFigure2.Testpitswereadvancedusingatrackhoeexcavator.SoilswerecontinuouslyLoggedandclassifiedinthefieldbyvisualexamination,inaccordancewiththeASTMSoilClassificationsystem.LogsofthetestpitsarepresentedonthetestpitsummarysheetsA-IandA-2.Thetestpitsummariesincludedescriptionsofthesoilsandpertinentfielddata.Soilconsistencyandmoistureconditionsindicatedonthelagsareinterpretationsbasedontheconditionsobservedinthefield.Boundariesbetweensoilstrataindicatedonthelogsareapproximateandactualtransitionsbetweenstratamaybegradual.ProjectNo.15-107-01Page14 LoggedbyJADTESTPITNO.IDate:3/6/15Elevation:409’•mediumdensedensedense!hardTESTPITNO.2Date:3/6/15Elevation:416’DepthSlowsClass.SoilDescription01234567ConsistencyMoistureColorW(%)CommentsGEOSPECTRUMCONSULTANTS,INCProposedCampbellShortPlatjKCPN1023059095,4400BlockNE9thSGeotechnicalEngineeringandEarthSciencesRenton,WashingtonProj.No.15-107Date3/15jFigureA-i0DepthBlowsClass,soilDescriptionConsistencyMoistureColorCLSM2loose3W(%)CommentsDuffw/organicsSiltyfineSandw!occgravelto2”&rootsto2”diameter1.withweakcemetationbecomesverycemented4moisttoverymoistmoist5darkbmbrowngray&red-brnwayørown617.515.17difficultdiggingMaximumdepth5feet.Nogroundwaterobserved.LoggedbyJADranic loosemoistSMSiltyveryfineSandw!gravelto20tobown&rootsto1”veryred-brnmoist13.3MSandySiltveryfine.22.2firmdifficultcementedhardmoistdiggingMaximumdepth5ftNogroundwaterobserved. LoggedbyJADTESTPITNO.3Date:3/6/15DepthBlowsClass.SoilDescriptionConsistencyMoistureIDuffw/organicslooseSiltyveryfineSandwioccgravelto2&abundantrootsTESTPITNO.4Elevation:412’Date:3/6/15Elevation:406’GEOSPECTRUMCONSULTANTS,INC.ProposedCampbellShortPlat____KCPN1023059095,4400BlockNE901StGeotechnicalEngineeringandEarthSciencesRenton,WashingtonProj.No.15-107JDate3/15jFigureA-2012Color3W(°A)Commentsmoisttoverymoist4SiltyfineSandw/occgravelto2’56darkbrnbrown&darkbrown&blacklightbrownDrown7FILL.1..jfficultdionino16.615.313.1cementedm.densedensehardmoistLoggedbyJADMaximumdepth6.5feetNogroundwaterobserved.DepthBlowsClass.SoilDescriptionConsistencyMoistureColorW(%)Comments0123456PDuff&ganicsloosemoistSMSiltyfine-coarseSandtobrownw/occ.gravelto4”&veryred-brn&abundantrootsto144moist204ffT:densverymoist•densewegraycementedhardmoistdifficult12.0diggingMaximumdepth4ft.Groundwaterseepageat2.5feet.7— SECTION7OTHERPERMITS SECTION8ESCANALYSISANDDESIGN JOBSHEETND.—CAtCULATEDBYCHECKEDBY—SCALEEncompassEngineering&SurveyingIEasternWashingtonDivision407SwiftwaterBlvd.,CleElum,WA98922Phone(509)674-7433Fax(509)674-7419IWesternWashingtonDivision165NEJuniperSt.,Suite201,Issaquab,WA98027Phone(425)382-0250Fax(425)391-3055OF—DATEDATEHfH*1HtTf!--.-.;Tfl-_LZHHj--izIzzJ:::::T::T:+:::::zz::::I:ELELEE—j:’tzH::I::::::E:tHE::H::tH-hmlZflflflLR&NGQ9r%J SECTION9BONDQUANTITIES,FACILITYSUMMARIES,ANDDECLARATIONOFCOVENANT -L _J L—L -L L LJ L.J L_J _J L_J L.D C.— Site Improvement Bond Quantity Worksheet 515 Web date:0440312015 U King County Department of Permitting &Environmental Review 35030 SE Douglas Street,Suite 210Snoqualmie,Washington 98065-9266 For alternate formats,call 206-296-6600.206-296-6600 TIl Relay 711 Project Name:campbell Short Plat Date:10/30/2015 Location: ___________________________________________________ Project No.:LUA15-000239,ECF,SHPL-A Activity No.: _____________________________ Note:All prices include labor,equipment,materials,overhead and Clearing greater than or equal to 5,000 board feet of timber?profit.Prices are from RS Means data adjusted for the Seattle area or from local sources if not included in the RS Means database. ________________ yes no If yes. Forest Practice Permit Number: ______________________ (RCW 76.09) Page 1 of 9 Unit prices updated:3/212015 Version:3/2/2015SiteImprovementBondQuantityWorksheet2015.xls Report Date:10/30/2015 815 Web date:04103/2015 —————-L --——L_!a r_n a a tEl fl Site Improvement Bond Quantity Worksheet Unit ‘ ‘#of ‘a’Refemnos 40 Price Unit ApplicationsEROStONISEDi(Nfr’Eá ber Backfill &compaction-embankment ESC-1 S 6.00 CVCheckdams,4”minus rock ESC-2 SWDM 5.46.3 $80.00 EachCrushedsurfacing11!4 minus ESC-3 WSDOT 9-03.9(3)$95.00 CVDitchingESC4$9.00 CVExcavation-bulk ESC-5 $200 CV 50 1 100Fence,silt ESC4 SWUM 543.1 $1.50 LFFence,Temporary (NGPE)ESC-7 $1.50 LF 500 1 750HydroseedingESC-8 SWDM 5.4.2.4 $0.80 SYJuteMeshESC-9 SWUM 5.4.2.2 $3.50 SYMulch,by hand,straw,3”deep ESC-10 SWUM 5.4.2.1 $2.50 SYMulch,by machine,straw,2”deep ESC-11 SWDM 5.4.2.1 $2.00 SY 500 1 1000Piping,temporary,CPP,6”ESC-12 $12.00 LEPiping,temporary,CPP,8”ESC-13 $14.00 LFPiping,temporary,CPP,12W ESC-14 $18.00 LFPlasticcovering,6mm thick,sandbagged ESC-15 SWUM 5.4.2.3 $4.00 SYRipRap,machine placed;slopes ESC-16 WSDOT 9-13.1(2)$45.00 CVRockConstructionEntrance,50’xlS’xl’ESC-17 SWUM 5.4.4.1 $1,800.00 Each 1 1 1800RockConstructionEntrance,100’xlS’xl’ESC-18 SWUM 5.4.4.1 $3,200.00 EachSedimentpondriserassemblyESC-19 SWUM 5.4.5.2 $2,200.00 EachSedimenttrap,5’high berm ESC-20 SWDM 5.4.5.1 $19.00 LFSed.trap,5’high,riprapped spiliway berm section ESC-21 SWUM 5.4.5.1 $70.00 LFSeeding,by hand ESC-22 SWUM 5.4.2.4 $1.00 SYSodding,1”deep,level ground ESC-23 SWDM 5.4.2.5 $8.00 SYSodding,1”deep,sloped ground ESC-24 SWUM 5.4.2.5 $10.00 SYTESCSupervisorESC-25 $110.00 HR 4 1 440Watertruck,dust control ESC-26 SWUM 5.4.7 $140.00 HRwaiwn‘9ue o.áé’M te. Each Page 2 of 9 ESO SUBTOTAL: 30%CONTINGENCY &MOBILIZATION: ESC TOTAL: COLUMN: S 4,090.00 $1 227.00 $5,317.00 A Unit prices updated:3/2/2015 Version:3/2)2015 Report Date:10/30/2015 Site Improvement Bond Quantity Worksheet 2015.xls ———Site 1rnpr5mani Band QuàntitiWdfshii ——date:oI5 GENERAL ITEMS Page 3 ci 9 No. SUBTOTAL 620.00 10,000.00 Unit pñces updated:0310212015 Version:03/02/2015 Report Date:10/30/2015 Existing Future Public PrivateRight-of-Way Right of Way Improvements &_Drainage_Facilities)Unit Price Unit Quant.I Cast Quart.I Cost Quant.Cost Backfill &Compaction-embankment 01 -1 $6.00 CV Backfill &Compaction-trench Cl -2 $9.00 CY Clear/Remove Brush,by hand GI -3 $1.00 SI Cleahnglcwbbingrrree Removal GI -4 $10,000.00 Acre Excavation -bulk Cl -5 $2.00 CV Excavation -Trench Cl -6 $5.00 CV Fencing,cedar,6’high Cl -7 $20.00 LE Fencing,chain link,vinyl coaled,6’high Cl -8 $20.00 LF Fencing,chain link,gate,vinyl coated,2C Cl -9 $1400.00 Each Fencing,split rail.3’high Cl -10 $15.00 LF Fill &compact -common barrow Cl -11 $25.00 CV Fill &compact -gravel base Cl -12 $27.00 CV Fill &compact -screened topsoil 01-13 $39.00 CV Gabion,12”deep,stone filled mesh (31-14 $65.00 SI Gabion,18”deep,stone filled mesh CR15 $90.00 SI Gabion,36”deep,stone filled mesh Gl-16 $150.00 SI Grading,fine,by hand 01-17 $2.50 51 Grading,fine,vth grader Cl .18 $2.00 51 Monuments,3’long Cl -19 $250.00 EacI Sensitive Areas Sign Cl -20 $7.00 Each Sodding,1”deep,sloped ground 01 -21 $8.00 SI Surveying,line &grade Cl -22 $850.00 Da’ Surveying,lot locationjlines Cl -23 $1,800.00 Acre Traffic control crew (2 flaggers)Cl -24 $120.00 HR Trail,4”chipped wood GI -25 $8.00 SI Trail,4”crushed cinder CI -26 $9.00 51 Trait,4”top course CS -27 $12.00 SI Wall,retaining,concrete Cl -28 $55.00 SF Watt,rockery Cl -29 $15.00 SF 1,000.00 “KCC 27A authorizes only one bond reduction. Site Improvement Bond Quantity Worksheet 201 5.xls -———•‘—-L -•--—L__C__i _n —ai ,,aSiteImprovementBondQuantityWorksheetaIeb4Juflls ROAD IMPROVEMENT Page 4 of 9 Unit prices updated:03/02/2015 Version:03/02/2015 Report Data 10/30/2015 No. AC Grinding,4’wide machine l000sy RI -1 $3000 SY AC Grinding,4 wide machine 1000-2000:RI -2 $1600 SY AC Grinding,4 wide machine>2000sy RI -3 $10.00 SY AC Removal/Disposal RI -4 $35.00 SY Barricade,type Ill (Permanent)Rl-6 $56.00 LF Curt &Gutter,rolled Rl-7 $17.00 LF Curb &Gutter,vertical RI-a $12.50 LF Curb and Gutter,demolition and disposal Rl-9 $18.00 LF Curb,extruded asphalt RI-la $5.50 LF Curb,extruded concrete RI -II $7.00 LF Sawcut,asphalt,3”depth RI -12 $1.85 LF Sawcut,concrete,per 1”depth RI -13 $3.00 LF Sealant,asphalt RI -14 $2.00 LF Shoulder,AC,(see AC road unit price)RI -15 $-SY Shoulder,gravel,4”thick RI -16 $15.00 5’? sidewalk,4”thick RI -17 $36.00 Sf Sidewatk,4 thick,demolition and disposE RI -16 $32.00 5’? Sidewalk.5”thick RI -19 $41.00 Sf Sidewalk,5”thick,demolition and disposz RI -20 $40.00 5’? Sign,handicap RI -21 $85.00 Each Striping,per stall RI -22 $7.00 Each Striping,thermoplastic.(for crosswalk)RI -23 $3.00 SF Striping,4’reflectorized line RI -24 $0.50 LF SUBTOTAL 7,225.00 KCC 27A authorizes only one bond reduction. Site Improvement Bond Quantity Worksheet 2015.xls —-‘S]te Tnipràvémèhf BÔñd auntr Wàfishi —e 015 Existing Future Public Private Right-of-way Right of Way Improvements 8.Drainage_Facilities Unit Price Unit Quant.Cost Quanl.Cost Quant.I Cast ROAD SURFACING —(4”Rock =2.5 base &1.5”to)course)9 1/2”Rock 8”base &15”top course)Additianal 2.5 Crushed Surfacing RS -1 $3.50 SY 150 540.00 HMA 1/2”Overlay,1.5”RS -2 $14.00 SY HMA 1/2”Overlay 2”RS -3 $18.00 SY HMA Road,2”,4”rack,First 2500 SY RS -4 $28.00 SY SMA Road,2”,4”rack,QIy.aver 2500 5’RS -5 $21.00 SY HMA Road,3”,9 1/2”Rock,First 2500 5’RS -6 $35.00 SY HMA Raad,3”,9 1/2”Rock,Qty Over 25(RS-7 $42.00 SY Nat Used RS-8 Nol Used RS-9 F4MA Road,6”Depth,First 2500 S’’RS-10 $33.10 SY HMA Raad,6”Depth,Qty.Over 2500 SY RS-11 $30.00 SY HMA SIC ar 1”,4”Depth RS -12 $20.00 BY 150 3,000.00 Gravel Raad,4”rock,First 2500 SY RS -13 $15.00 SY Gravel Road,4”rack,Qly.over 2500 SY RS-14 $10.00 BY PCC Road (Add Under Write-Ins w/Desig RB-15 Thickened Edge RB -17 $8.60 LE Page 5 of 9 SUBTOTAL 3,540.00 __________________ Unit prices updated:03)02)2015KCC27Aaulhadzesanlyonebandreduclian.Version:03/02/2015SiteImprovementBondQuantityWorksheet2315.xls Report Date;10)30/2015 ————Sit&[mprbvèm’en Bb?id QübnfifjWö?ksh’ià’t —— EPdate:,01 S SUBTOTAL 1,500.00 4,815.00 (CBs include frame and lid) Existing Future Public Private RIght-of-way Right of Way Improvements __________ &_Drainage FacilitiesIUnitPriceUnitQuant.Cast Quant.I Cost Quant.Cost DRAINAGE (CPP =Corrugated Plastic Pipe,N12 or Equivalent)For Culvert prices,Average of 4’cover was assumed.Assume perforated PVC is same price as solid pipe.Access Road,RIO L°-4 21.OpJ_ Bollards -fixed 0 -2 $240.74 Each Boltards -removable 0-3 $452.34 Each CBTypeI 0-4 $1,50000 Each CBTypelL 0-5 $1,75000 Each GB Type II,48”diameter 0 -6 $2,300.00 Each for addilional depth over 4’0-7 $480.00 FT CB Type II,54”diameter 0 -8 $2,500.00 Each for additional depth over 4’0-9 $495.00 FT CR Type II,60”diameter D -10 $2,800.00 Each for additional depth over 4’0 -11 $600.00 FT CR Type II,72”diameter 0 -12 $3,600.00 Each for additional depth over 4’0 -13 $850.00 FT Through-curb inlet Frameworic (Add)0 -14 $400.00 Each Cleanout,PVC,4”D-15 $150.00 Each Cleanoul,PVC,6”0-16 $170.00 Each Cleanout,PVC.8”0 -17 $200.00 Each Culvert,PVC,4”0 -18 S 10.00 LF Culvert,PVC,6”D -19 $13.00 LF Culvert,PVC,8”0-20 $15.00 LF Culvert,PVC,12’0-21 $23.00 IF Culvert,CMP,8”0-22 $19.00 LF Culvert,CMP,12”0-23 $29.00 LF Culvert,CMP,15”0-24 $35.00 LF Culvert,CMP,18”0-25 $41.00 LF Culvert,CMP,24”0 -26 $56.00 LF Culvert,CMP,30”D -27 $78.00 LF Culvert,CMP,36”0 -28 $130.00 LF Culvert,CMP,48”0 -29 $190.00 LF Culvert,CMI’,60”0 -30 $270.00 IF Culvert,CMP,72”0-31 $350.00 LF Page 6 of 9 Unit prices updated: Version: Report Date: 0310212015 03102)2015 10/30/2015 *KCC 27A authorizes only one bond reduction. Site Improvement Bond Quantity Worksheet 201 5.xls ————C—-.---.-——,__J __j __.__j .———1 ‘9SiteImprovementBondQuantityWorksheetU4103J2015 Existing Future Public Private Right-of-way Right of Way ImprovementsDRAINAGECONTINUED8DraInageFacilities No.Unit Price Unit Quait Cost Quart Cast Quant.(CastCulvert,Concrete,8’0 -32 $25.00 IS Culvert,Concrete,12’0-33 $36,00 LF Culvert,Concrete,15’0-34 $4200 IS Culvert.Concrete,18”13-35 $48.00 IS Culvert,Concrete,24’0-36 $78,00 IS Culvert,Concrete,30’D-37 $12500 LF Culvert,Concrete,36”0-38 $150.00 LF Culvert,Concrete,42”0-39 $17500 LF Culvert.Concrete,48”0-40 $205.00 LF Culvert,CPP,6’0-41 $14.00 LF Culvert,CPP,8”0-42 $16.00 IS Culvert,CPP.12”0-43 $24,00 IS Culvert,CPP,15”0-44 $35.00 IS Culvert,CPP,18”0-45 $41.00 IS Culvert,CPP,24”0 -46 $56.00 LF Culvert,CS’,30”0 -47 $78.00 IF Culvert.CPP,36”0-48 $130.00 LF Ditching 0 -49 $9.50 CV Flow Dispersal Trench (1.436 base’)0 -SO $28.00 IF French Drain (3’depth)0-51 $26.00 I_F Geotextile,laid in trench,polypropylene 0-52 $3.00 SY Mid-tank Access Riser,48”dia,6 deep 13-54 $2,000.00 Each Pond Overflow Spillway 0-55 $16.00 SY Resthctorlail Separator,12”D-56 $1150.00 Each RestrictariOil Separator.15”0-57 $1.350,00 Each Restrictar/Oll Separator,18”D-58 $1,700.00 Each Riprap,placed 0-59 $42.00 CV Tank End Reducer (36”diameter)0-60 $1,200.00 Each Trash Rack,12”0 -61 $35000 Each Trash Rack,15”D -62 $410.00 Each Trash Rack,18”0 -63 5 480.00 Each Trash Rack,21”13 -64 $550.00 Each Page7ot9 SUBTOTAL ________________________________ Unit prices updated:0310212015KCC27Aauthorizesonlyonebondreduction.Version:03102)2015SiteImprovementBondQuantityWorksheet2015.xls Report Date:10/3012015 ———__J ZJitethipröSieméiilBaWdQ’üantitVWorksheet date:0I5 Existing Futura Public Private Right-of-way Right of Way Improvements &_Drainage_Facilities Unit Price Unit Quant.Price Quant.Cost Quant.I Cost PARKING LOT SURFACING Not To Be Used For Roads Or ShouldersNo. 2’AC,2”iop course rock &4”borrow PL -1 $21.00 Si NA NA2’AC.15”top course &25”base coun-PL -2 $28.00 SY NA NA4”select barrow PL -3 $5.00 SY NA NAl.flop course rock &2.5”base course PL -4 $14.00 SY NA NA UTILITY POLES &STREET LIGHTING Utility pole relocation costs must be accompanied by Franchise Utility’s Cost Estimate Utility Pole(s)_Relocation UP-i Lump Sum 3000 UP-2 EachStreetLigPolesw/Luminaires (Such as detentionfwater quality vaults.)No. SUBTOTAL 8,000.00 SUBTOTAL (SUM ALL PAGES):21,085.00 100000 24,635.00 6,325.50 300.00 27,410.50 1,300.00 B C 7,390.50 Unit prices updated:03/0212015 Version:03/02)2015 Report Date:10/30/2015 WRITE-IN-ITEMS Relocated Street Light WI -1 $2,500.00 Each Wl-2 SY WI-3 CV Dispersion Trench WI -4 $30.00 LF WI-S FT Fire Hydrant Wi -6 $5,000.00 EA 5000SSServiceWI-7 $13.00 LF SS Service Connection WI -8 $500.00 EA Water Service WI -9 $2,500,00 EA WI-ID Page 8 of 9 30%CONTINGENCY &MOBILIZATION: GRANDTOTAL: COLUMN: 9,820.00 32,025.50 0 KCC 27A authorizes only one bond reduction. Site Improvement Bond Quantity Worksheet 2015.xls L_c L_C.L L_L_L_J L_J F_J L_J ——C — Original bond computations prepared by: Site Improvement Bond Quantity Worksheet Web date:0410312015 Encompass Engineering 165 NE Juniper St.,Suite 201,Issaquah WA 98027 Date:10/30)2015 Tel.#:425-392-0250 Project No:LUA15-000239,ECF,SHPL-A FINANCIAL GUARANTEE REQUIREMENTS PUBLIC ROAD &DRAINAGE MAINTENANCEIDEFECT BoND’ *NOTE:The ward bond’as used in this document means a financial guarantee acceptable to King County. NOTE:KCC 27A authorizes right of way and site restoration bonds to be combined when both are required. The restoration requirement shall include the total cast for all TESC as a minimum,not a maximum.In addition,corrective Work,bath on-and off-site needs to be included.Quantities shall reflect worse case scenarios not just minimum requirements.For example,if a salmonid stream may be damaged,some estimated casts for restorationneedstobereflectedinthisamount.The 30%contingency and mobilation costs are computed in this quantity. “NOTE:Per KCC 27A,total bond amounts remaining after reduction shall not be less than 30%of the original amount fr)or as revised by major design changes. REQUIRED BOND’AMOUNTS ARE SUBJECT TO REVIEW AND MODIFICATION BY KING COUNTY Unit prices updated:03/0212015 Version:03/0212015 Report Date:10/30/2015 Name: PE Registration Number: Firm Name: Address: Chad Allen 38285 PERFORMANCE BOND’ AMOUNT (A) (B) (C) (D) (A+B) (1) Stabilization/Erosion Sediment Control (ESC) Existing Right-of-Way Improvements Future Public Right of Way &Drainage Facilities Private Improvements Calculated Quantity Completed Total Right-of Way and/or Site Restoration Bond*/** (First $7,500 of bond’shall be cash.) Performance Bond Amount (A+B+C+D)=TOTAL Maintenance/Detect Bond’Total NAME OF PERSON PREPARING BOND’REDUCTION: $5,317.0 S 27,410.5 S 1,300.0 $32,025.5 5 32,727.5 s 66,053.0 MINIMUM BOND’AMOUNT REQUIRED FOR RECORDING OR TEMPORARY OCCUPANCY AT SUBSTANTIAL COMPLETION TxO.30 $19,815.9 Minimum is $2000.Minimum is $2000. (B+C)x 0.25 = Date: $7,177.6 Minimum is $2000. Page 9 of 9 Check out the DDES Web site at www.kingcounty.gov/permits Site Improvement Bond Quantity Worksheet 2015.xls SECTION10OPERATIONSANDMAINTENANCEMANUAL APPENDIXAMAINTENANCEREQUIREMENTSFORFLOWCONTROL,CONVEYANCE,ANDWQFACILITIESNO.5—CATCHBASINSANDMANHOLESMaintenanceDefectorProblemIConditionWhenMaintenanceisNeededResultsExpectedWhenComponentMaintenanceIsPerformedStructureSedimentSedimentexceeds60%ofthedepthfromtheSumpofcatchbasincontainsnobottomofthecatchbasintotheinvertofthesedimenilowestpipeintooroutofthecatchbasinoriswithin6inchesoftheinvertofthelowestpipeIntooroutofthecatchbasin.TrashanddebrisTrashordebrisofmorethan‘AcubicfootwhichNoTrashordebrisblockingorislocatedimmediatelyinfrontofthecatchbasinpotentiallyblockingentrancetoopeningorisblockingcapacityofthecatchbasincatchbasin.bymorethan10%.TrashordebrisinthecatchbasinthatexceedsNotrashordebrisinthecatchbasin.1/thedepthfromthebottomofbasintoinvertthelowestpipeintooroutofthebasin.DeadanimalsorvegetationthatcouldgenerateNodeadanimalsorvegetationodorsthatcouldcausecomplaintsordangerouspresentwithincatchbasin.gases(e.g..methane).Depositsofgardageexceeding1cubIcfootinNoconditionpresentwhichwouldvolume,attractorsupportthebreedingofinsectsorrodents.DamagetoframeCornerofframeextendsmorethan‘4inchpastFrameisevenwithcurb.and/ortopslabcurbfaceIntothestreet(Ifapplicable).Topslabhasholeslargerthan2squareinchesorTopslabisfreeofholesandcracks.crackswiderthan‘4inch.Framenotsittingflushontopslab,i.e.,Frameissittingflushontopslab.separationofmorethan‘4inchoftheframefromthetopslab.CracksinwailsorCrackswiderthan¼inchandlongerthan3feet.Catchbasinissealedandbottomanyevidenceofsoilparticlesenteringcatchstructurallysound.basinthroughcracks,ormaintenancepersonjudgesthatcatchbasinisunsound.Crackswiderthan¼inchandlongerthan1footNocracksmorethan1/4inchwideatatthejointofanyinlet/outletpipeoranyevidencetheolntofinlet/outletpipe.ofsoilparticlesenteringcatchbasinthroughcracks.Settlement!Catchbasinhassettledmorethan1inchorhasBasinreplacedorrepairedtodesignmisalignmentrotatedmorethan2inchesoutofalignment.standards.DamagedpipejointsCrackswiderthanWinchatthejointoftheNocracksmorethan‘1.-inchwideatinlet/outletpipesoranyevidenceofsoilenteringthejointofinlet/outletpipes.thecatchbasinatthejointoftheInlet/outletpipes.ContaminantsandAnyevidenceofcontaminantsorpollutionsuchMaterialsremovedanddisposedofpollutionasoil,gasoline,concreteslurriesorpain,accordingtoapplicableregulations.SourcecontrolBMPsimplementedifappropriate.Nocontaminantspresentotherthanasurfaceoilfilm.Inlet/OutletPipeSedimentSedimentfilling20%ormoreofthepipe.Inlet/outletpipesclearofsediment.accumulationTrashanddebrisTrashanddebrisaccumulatedinInlet/outletNotrashordebrisinpipes.pipes(Includesfloatablesandnon-floatables).DamagedCrackswiderthanWinchatthejointoftheNocracksmorethan‘A-inchwideatinlet/outletpipesoranyevidenceofsoilenteringthejointoftheinlet/outletpipe.atthejointsoftheinlet/oulletpipes.I2009SurfaceWaterDesignManual—AppendixA1/9/2009A-9 APPENDIXAMAINTENANCEREQUIREMENTSFLOWCONTROL,CONVEYANCE,ANDWQFACILITIESNO.5—CATCHBASINSANDMANHOLESMaintenanceDefectorProblemConditionWhenMaintenanceisNeededResultsExpectedWhenComponentMaintenanceisPerformedMetalGratesUnsafegrateopeningGratewithopeningwiderthan7/inch.Grateopeningmeetsdesign(CatchBasins)standards.TrashanddebrisTrashanddebristhatisblockingmorethan20%Gratefreeoltrashanddebris.ofgratesurface.footnotetoguidelinesfordisposalDamagedormissingGratemissingorbrokenmember(s)ofthegrate.GrateisinplaceandmeetsdesignMyopenstructurerequiresurgentstandards.maintenance.ManholeCover/lidCoverflidnotinplaceCover/lidismissingoronlypafliallyinplace.CoverflidprotectsopeningtoAnyopenstructurerequiresurgentstaicture.maintenance.LockingmechanismMechanismcannotbeopenedbyoneMechanismopenswithpropertools.NotWorkingmaintenancepersonwithpropertools.Boltscannotbeseated.Self-lockingcover/liddoesnotwork.Cover/liddifficulttoOnemaintenancepersoncannotremoveCover/lidcanberemovedandRemovecever/lidafterapplying80lbs.oflift,reinstalledbyonemaintenanceperson.J1/9/2009A-102009SurfaceWaterDesignManual—AppendixA APPENDIXAMAINTENANCEREQUIREMENTSPORFLOWCONTROL,CONVEYANCE,ANDWQFACILITIESINO.6-CONVEYANCEPIPESANDDITCHESMaintenance(DefectorProblemConditionsWhenMaintenanceIsNeededResultsExpectedWhenComponentMaintenanceisPerformedPipesSediment&debrisAccumulatedsedimentordebristhatexceedsWaterflowsfreelythroughpipes.accumulation20%ofthediameterofthepipe.Vegetation/rootsVegetation/rootsthatreducefreemovementofWaterflowsfreelythroughpipes.waterthroughpipes.ContaminantsandAnyevidenceofcontaminantsorpollutionsuchMaterialsremovedanddisposedofpollutionasoil,gasoline,concretesluniesorpaint,accordingtoapplicableregulations.SourcecontrolBMPsimplementedifappropriate.Nocontaminantspresentotherthanasurfaceoilfilm.DamagetoprotectiveProtectivecoatingisdamaged;rustorcorrosionPiperepairedorreplaced.coatingorcorrosionisweakeningthestructuralIntegrityofanypartofpipe.DamagedAnydentthatdecreasesthecrosssectionareaofPiperepairedorreplaced.pipebymorethan20%orisdeterminedtohaveweakenedstructuralintegrityofthepipe.DitchesTrashanddebrisTrashanddebrisexceedsIcubIcfootper1,000Tra5handdebrisclearedfromsquarefeetofditchandslopes,ditches.SedimentAccumulatedsedimentthatexceeds20%oftheDitchcleaned/flushedofallsedimentaccumulationdesigndepth.anddebrissothatitmatchesdesign.NoxiousweedsAnynoxiousornuisancevegetationwhichmayNoxiousandnuisancevegetationconstituteahazardtoCountypersonnelortheremovedaccordingtoapplicablepublic,regulations.NodangerofnoxiousvegetationwhereCountypersonnelorthepublicmightnormallybe.ContaminantsandAnyevidenceofcontaminantsorpollutionsuchMaterialsremovedanddisposedofpollutionasoil,gasoline,concreteslurriesorpaint,accordingtoapplicableregulations.SourcecontrolBMPsimplementedifappropriate.Nocontaminantspresentotherthanasurfaceoilfilm.VegetationVegetationthatreducesfreemovementofwaterWaterflowsfreelythroughditches.throughditches.ErosiondamagetoAnyerosionobservedonaditchslope.Slopesarenoteroding.slopesRockliningoutofOnelayerorlessofrockexistsabovenativesoilReplacerockstodesignstandards.placeormissing(ifarea5squarefeetormore,anyexposednativejApplicable)soil.2009SurfaceWaterDesignManual—AppendixAA-Il1/9/2009 C.2.lFULLDLSPERSIONTABLEC2.LBSELECrEDNATIVEVEGETATION,SIZE,ANDSPACINGREQUIREMENTSSpeciesTypeSunandMoisturePreferencesPlantedSpacingSizeovatum)Kinnikinick(Arctostaphyllosuva-ursa)groundcoverSuntopartialshade,drysoil1gallon2’D.c.Salal(Gaulthedashallon)groundcoverSuntoshade,drytomoistsoil1gallon18”o.c.LowOregongrape(Mahonia,epens)IgroundcoverSuntopartialshade,drytomoistsoil9-12”18”o.c.Swordfern(Polystichummunitum)[groundcoverSuntodeepshade,drytomoistsoil2gallon3’o.c.C.2.1.9MAINTENANCEINSTRUCTIONSFORFULLDISPERSIONIfthethUdispersionRowcontrolBMPisproposedforaproject,thefollowingmaintenanceandoperationinstructionsmustberecordedasanattachmenttotherequireddeclarationofcovenantandgrantofeasementperRequirement3ofSectionC.1.3.3(p.C-18).TheintentoftheseinstructionsistoexplaintoFuturepropertyowners,thepurposeoftheBMPandhowitmustbemaintainedandoperated.Theseinstructionsareintendedtobeaminimum;DOESmayrequireadditionalinstructionsbasedonsite-specificconditions.Also,astheCountygainsmoreexperiencewiththemaintenanceandoperationoftheseBMPs,fUtureupdatestotheinstructionswillbepostedonKingCounty’sSurfaceWaterDesignManualwebsite.ciTEXTOFINSTRUCTIONSYourpropertycontainsastormwatermanagementflowcontrolBMP(bestmanagementpractice)called“fulldispersion.’Fulldispersionisastrategyforminimizingtheareadisturbedbydevelopment(i.e.,imperviousornon-nativepervioussurfaces,suchasconcreteareas,roofs,andlawns)relativetonativevegetatedareas(e.g.,forestedsurface)togetherwiththeapplicationofdispersiontechniquesthatutilizethenaturalcapacityofthenativevegetatedareastomitigatethestormwaterrunoffquantityandqualityimpactsofthedevelopedsurfaces.ThisflowcontrolBMPhastwoprimarycomponentsthatmustbemaintained:(1)thedevicesthatdisperserunofffromthedevelopedsurfacesand(2)thenativevegetatedarea.DispersionDevicesThedispersiondevicesusedonyourpropertyincludethefollowingasindicatedontheflowcontrolBMPsiteplan:Usplashblocks,Urockpads,Ugravelfilledtrenches,Usheetflow.Thesize,placement,composition,anddownstreamflowpathsofthesedevicesasdepictedbytheflowcontrolBMPsiteplananddesigndetailsmustbemaintainedandmaynotbechangedwithoutwrittenapprovaleitherfromtheKingCountyWaterandLandResourcesDivisionorthroughafuturedevelopmentpermitfromKingCounty.Dispersiondevicesmustbeinspectedannuallyandaftermajorstormeventstoidentifyandrepairanyphysicaldefects.Whennativesoilisexposedorerosionchannelsarepresent,thesourcesoftheerosionorconcentratedflowneedtobeidentifiedandmitigated.Barespotsshouldbere-vegetatedwithnativevegetation.Concentratedflowcanbemitigatedbylevelingtheedgeoftheperviousareaand/orregradingorreplenishingtherockinthedispersiondevice,suchasinrockpadsandgravel-filledtrenches.NativeGrowthRetentionAreaThenativevegetatedsurfacerequiredforfulldispersionisdelineatedasa“nativegrowthretentionarea”ontheflowcontrolBMPsiteplan.Thetrees,vegetation,groundcover,andsoilconditionsinthisareamaynotbedisturbed,exceptasallowedbythefollowingprovisionsforthatportionofthenativegrowthretentionareaoutsideofcriticalareasandcriticalareabuffers:1.TreesmaybeharvestedinaccordancewithakingCounty-approvedforestmanagementplan.2.Individualtreesthathaveastructuraldefectduetodiseaseorotherdefects,andwhichthreatentodamageastructure,road,parkingarea,utility,orplaceofemploymentorpublicassembly,orblockemergencyaccess,maybetopped,pruned,orremovedasneededtoeliminatethethreat.2009SurfaceWaterDesignManual—AppendixC1/9/2009C-39 SECTIONC.2FLOWCONTROLBMPs3.Deadorfallentrees,treelimbswithintenfeetoftheground,andbranchesoverhangingaresidencemayberemovedtoreducethedangerofwildfire.4.Noxiousweeds(i.e.,plantspecieslistedontheStatenoxiousweedlistinChapter16-750WAC)andinvasivevegetation(i.e.,plantspecieslistedasobnoxiousweedsonthenoxiousweedlistadoptedbytheKingCountyDepartmentofNaturalResourcesandParks)mayberemoved.5.Passiverecreationusesandrelatedfacilities,includingpedestrian,equestriancommunityandbicycletrails,natureviewingareas,fishingandcampingareas,andothersimilarusesthatdonotrequirepermanentstructures,areallowedifclearingandsoilcompactionassociatedwiththeseusesandfacilitiesdoesnotexceedeightpercentofthenativegrowthretentionarea.1/9/20092009SurfaceWaterDesignManual—AppendixCC40