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Home My WebLink AboutTIR-38602001UnionAveShortPlatLUA14-000916,SHPL-A2001UnionAveNERenton,WA98059April30,20151ZJtEp4(t’jlI5v1ttD9/a/ISEncompassEngineeringJobNo.15515PreparedForBillHughes14401Essaquah-HobartRdEssaquah,WA98027cEs3%oRECEIVEDOCT282015CITYOFRENTONPLANNINGDIVISIONWesternWashingtonDivision165NEJuniperSt.,Ste201,Issaquah,WA98027Phone:(425)392-0250Fax:(425)391-3055EasternWashingtonDivision108East2”Street,CleElum,WA98922Phone:(509)674-7433Fax:(509)674-7419EncompassfS\ENGINEERING&SURVEYINGITechnicalInformationReportfor7/cwww.EncompassES.net tTABLEOFCONTENTSPROJECTOVERVIEWCONDITIONSANDREQUIREMENTSSUMMARYOFF-SITEANALYSISFLOWCONTROLANDWATERQUALITYFACILITYANALYSISANDDESIGNCONVEYANCESYSTEMANALYSISANDDESIGNSPECIALREPORTSANDSTUDIESOTHERPERMITS—NAESCANALYSISANDDESIGNBONDQUANTITIES,FACILITYSUMMARIES,ANDDECLARATIONOFCOVENANT—N/AOPERATIONSANDMAINTENANCEMANUAL—N/ASECTIONI:SECTIONII:SECTIONIII:SECTIONIV:SECTIONSECTIONSECTIONSECTIONSECTIONV:VtVII:VIII:IX:SECTIONX: SECTION1PROJECTOVERVIEW SiteAddress:2001UnionAveNE,RentonWA,98059KingCountyTaxParcel:042305-9077ProjectOverviewThisprojectinvolvesdevelopmentofa1.13acreparcelintofive(5)single-familyresidentiallots.Theexistingparcelhasanexistinghouse.Theremainingareaiscoveredwithseveralmaturetreeswithlawn.Thesitegenerallyslopesdowntonorthwestatapproximately2%to8%.PertheSCSSoilmaps,thesiteisunderlainwithAldenvood,gravellysandyloam,AgC.-Seeattachedgeotechnicalreport.ProposedDrainageControlsAcombinationdetentionandwaterqualitywetpondwillprovidetherequireddetentionandwaterqualitycontrol.RefertoSection4ofthisTIRfortheFlowControlandWaterQualiwBMPsdesign.2009KCSWDMCoreRequirementsSection1.2.1CoreRequirement#1:DischargeatthenaturallocationTheproposedon-sitedrainagewillbetightlinedfromtheprojectstormwaterpondtothe18”stormdraininUnionAveNE.Becausethenaturaldischargeistothewestsheetflowsthroughyardsandintoaprivatedrainage/detentionsystem,itisnotfeasibletodischargetothewest.Asisconsistentwiththeapprovedpreliminaryshortplat,thesiterunoffwillbecollected,treatedanddetainedinanopenpondatthcwcstcndoftheproject,thenpipedeasttothepublic18’slornisysieminUnionAvenueNE.Section1.2.2CoreRequirement#2:OffsiteAnalysis•AnoffsitedrainageanalysisisprovidedinthisPreliminaryTIltSection1.2.3CoreRequirement#3:FlowControl•AnopenpondwillprovidetherequiredflowcontrolandwaterqualitytreatmentpertheFlowControLDurationStandard(ForestedConditions).Section1.2.4CoreRequirement#4:ConveyanceSystem•TheconveyancesystemanalysisshowsthattheconveyancecapacitymeettheCity’sstandards.Section1.2.5CoreRequirement#5:ErosionandSedimentControl•AtemporaryerosioncontrolplanwillprovideBMPstobeimplementedduringconstruction.Section1.2.6CoreRequirement#6:MaintenanceandOperations Maintenanceandoperationsrecommendationsareprovidedinsection10ofthishR.Section1.2.7CoreRequirement#7:FinancialGuaranteesandLiability•Thedeveloperwillarrangeforanyfinancialguaranteesandliabilitiesrequiredbythepermit.Section1.2.8CoreRequirement#8:WaterQuality•Acombinationdetentionandwaterqualitywetpondwillprovidetherequiredwaterqualitytreatment.2009ICCSWUMSpecialRequirementsSection1.3.1SpecialRequirement#1:OtherAdoptedArea-SpecificRequirements•N/ASection1.3.2SpecialRequirement#2:Floodplain/FloodwayDelineation•N/AtherearenoFEMAfloodpl&ns/floodwaysintheareaSection1.3.3SpecialRequirement#3:FloodProtectionFacilities•N/ASection1.3.4SpecialRequirement#4:SourceControl•Sourcecontrolisnotrequiredforthisproject.Section1.3.5SpecialRequirement#5:OilControl•N/AOilcontrolisnotrequiredforthisproject.Section1.3.6SpecialRequirement#6:AquiferProtectionArea•ThisprojectisinAPAZone2,triggeringalinerrequirementfortheproposedopenstormwaterpond.Acompactedtilllinerwillconstructedinthebottomofthepondtoflilfillthisrequirement. lCDI-cDi-—4P..r.J..Pa..;....‘..:.;....Ln..ê...?...?t-n—--—.aQ.a.—n—-——,—a.-—1———N__—.——s—qL-—-4—I—:4—‘I______-I,)a.--Nfl•,nMIrn VICINITYMAP IKINGCOUNTY,WASHINGTON,SURFACEWATERDESIGNMANUAL-TECHNICALINFORMATIONREPORT(TIR)WORKSHEETPart2PROJECTLOCATIONANDDESCRIPTIONProjectName%4n/d$.qs4&-DDESPermit#LocationTownship‘23RangeS5’SectionSiteAddressZoi(JWIo-’Part4OTHERREViEWSANDPERMITSUDFWHPAUShorelineUCOE404ManagementUDOEDamSafetyUStructuralRockeryNaulU_____UFEMAFloodplainESASection7UCOEWetlandsUOtherPart5PLANANDREPORTINFORMATIONTechnicalInformationReportTypeofDrainageReviewuTargeted/(circle):argeSiteDate(includerevisiondates):DateofFinal:SiteImprovementPlan(Engr.Plans)Type(circleone):FullIModifiedISmallSiteDate(includerevisiondates):DateofFinal:Part6ADJUSTMENTAPPROVALSType(circleone):StandardIComplex/Preapplication/Experimental/BlanketDescription:(includeconditionsinTIRSection2)IDateofApproval:Part1PROJECTOWNERANDPROJECTENGINEERProjectOwner‘-i..1-1-v4Phone44Z’-q’yg-,mrAddressProjectEngineer7MI2)c*CompanytJCOt.kçk5-PhonePartSTYPEOFPERMITAPPLICATIONULanduseServicesSubdivisonIShortSubd.IUPDUBuildingServicesM/FICommehcal/SFRUClearingandGradingURight-of-WayUseUOther2009SurfaceWaterDesignManual1/9/2009 KENGCOUNTY,WASHINGTON,SURFACEWATERDESIGNMANUALTECHNICALINFORMATIONREPORT(TIR)WORKSHEETPart7MONITORINGREQUIREMENTSMonitoringRequired:Yes/NoStartDate:CompletionDate:Describe:Part8SITECOMMUNITYANDDRAINAGEBASINCommunityPlan:rEjt.ng‘-‘SpecialDistrictOverlays:DrainageBasin:146nt’rC-StormwaterRequirements:Part9ONSITEANDADJACENTSENSITIVEAREASURiver/StreamUSteepSlopeULakeUErosionHazardUWetlandsULandslideHazardUClosedDepressionUCoalMineHazardUFloodplainUSeismicHazardUOtherUHabitatProtectionUPart10SOILSSoilTypeSlopesErosionPotentialg4tWflwoccçLpcJUHighGroundwaterTable(within5feet)USoleSourceAquiferUOtherUSeeps/SpringsLIAdditionalSheetsAttached2009SurfaceWaterDesignManual21/9/2009 SECTION2CONDITIONSANDREQUIREMENTSSUMMARY bEPARTMENTOFC0MMuNIn-ANDECONOMICDEVELOPMENT_rADMINISTRATIVESHORTPLATREPORT&DECISION4.SUMMARYANDPURPOSEOFREQUESTREPORTDATE:September12,2014ProjectName:2001UnionAveShortPlatProjectNumberLUA14-000916,SRPL-AProjectManager:JillDing,SeniorPlannerOwner/ApplicantKushalVarmaandKajalRam2016LincolnAvenueNERenton,WA98056Contact:DanThumaToumaEngineering255SW4fStreetRenton,WA98057ProjectLocation:2001UnionAvenueNEProjectSummary:TheapplicantisrequestingPreliminaryShortNatapprovalforthesubdivisionofanexisting49,093squarefoot(1.12acre)lotlocatedwithintheResidential-8dwellingunitperacre(R-8)zoningdesignation,intoSlotsandtwotracts(TractsAandB).TractAisproposedasastormwaterdetentiontractandTractsBisproposedasaprivateaccesstract.Accesstotheproposedlotswouldbeprovidedviaanew26-footwideprivatestreetoffofUnionAvenueNE,whichterminatesinahammerheadturnaround.Theproposedlotswouldrangeinsizefrom4,829squarefeetto7,606squarefeetTheprojectsiteislocatedwithinanAquiferProtectionArea2,noothercriticalareasaremappedontheprojectsite.Exist.Bldg.AreaSF:N/AProposedNewBldg.AreaUnknown(footprint):ProposedNewBldg.Area(gross):N/ASiteArea:49,093sfTotalBuildingArea6SF:N/ASHPLReport14-000916916 CityofRentonDepartmentofCommunity&EconomicDevelopmentAdministrativeShortPlotReport&Decisiph2001UNIONAVESHORTPMTLUAI4-000916,SHPL-AReportofSeptember12.2014Page2of20B.EXHIBITS:Exhibit1:StaffReportExhibit2:NeighborhoodDetailMapExhibit3:ShortPlatPlan(datedMarch2014)Exhibit4:GradingandUtilityPlan(datedJune2014)ExhibitS:LandscapePlan(datedMarch2014)ExhibitS:TreeRetentionWorksheetExhibit7:GeotechnicalInfiltrationFeasibilityLetter,preparedbyGeoResources,LLC(dated5/23/2014)ExhibitS:TIRStormDrainageReport,preparedbyToumaEngineers,datedJuly1,2014CGENERALINFORMATION:1.Owner(s)ofRecord:KushalVarmaandKajalRam,2016LincolnAvenueNERenton,WA980562.ZoningDesignation:Residential—Bdwellingunitsperacre(R-8)3.ComprehensivePlanLandUseDesignation:Re5identialSingleFamily(RSF)4.ExistingSiteUse:Single-familyhouse”5.NeighborhoodCharacteristics:a.North:Single-familyresidential(R-8)b.East:Singlefamilyresidential(R-S)c.South:Single-family-residential(H-B)d.West:FirstUkrainianPentecostalChurch(R-8)6.Access:UnionAvenueNE7.SiteArea:49,093sfD.HiSTORICAL/BACKGROUND:ActionLandUseFileNo.OrdinanceNo.DateComprehensivePlanN/A510011/01/2004ZoningN/A509911/01/2004AnnexationN/A407006/01/1987E.APPLICABLESECTIONSOFTHERENTONMUNICIPALCODE:1.Chapter2LandUseDistrictsa.Section4-2-020:PurposeandIntentofZoningDistrictsSHPLReport14-000916 CityofRentonDepartmentofCommunity&EconomicDevelopmentAdministrativeShortPlotReport&Decision2001UNIONAVESHORTPEATLUA14-000916,SHPL-AReportofSeptember12,2014Page3of20b.Section4-2-070:ZoningUseTablec.Section4-2-110:ResidentialDevelopmentStandardsd.Section4-2-115:ResidentialDesignandOpenSpaceStandard2.Chapter4PropertyDevelopmentStandardsa.Section44-030:DevelopmentGuidelinesandRegulationsb.Section4-4-070:Landscapingc.Section4-4-130:TreeRetentionandLandClearingRegulations3.chapter6StreetsandUtilityStandardsa.Section4-6-050:StreetStandards4.Chapter7SubdivisionRegulationsa.Section4-7-070:DetailedProceduresforShortSubdivisionsb.Section4-7-120:CompatibilitywithExistingLandUseandPlan—GeneralRequirementsandMinimumStandardsc.Section4-7-150:Streets—GeneralRequirementsandMinimumStandardsd.Section4-7-270:ResidentialLots—GeneralRequirementsandMinimumStandards5.Chapter11DefinitionsF.APPLICABLESECTIONSOFTHECOMPREHENSIVEPLAN:1.LandUseElement:ResidentialSingleFamily2.CommunityDesignElement:EstablishedResidentialNeighborhoodsandNewandInfillDevelopmentG.DEPARTMENTANALYSIS:1.ProjectDescription/BackgroundTheapplicanthasproposedtosubdividea1.13acre(49,093squarefeet)sitelocatedwithintheResidential—8dwellingunitsperacre(R-8)zone.Theproposalwouldcreate5lotsintendedforthedevelopmentofdetachedsingle-familyresidencesandtwotracts.TractAwouldbeforstormwaterdetentionandTractBwouldbeaprivatestreet.Oneexistingsingle-familyresidenceanddetachedgarageareproposedtoberemoved.Theproposalforssinglefamilylotswouldresultinanetdensityof5.62dwellingunitsperacre.ThealloweddensityrangeintheR-8zoneisaminimumof4.0toamaximumof8.0dwellingunitsperacre.Theproposalisconsistentwiththesedensityrequirements.ProposedLot1wouldhaveanareaof7,606squarefeet,Lot2wouldhaveanareaof4,831squarefeetLot3wouldhaveanareaof4,229squarefeetLot4wouldhaveanareaof4,922squarefeetLotSwouldhaveanareaof4,972squarefeetTractAwouldhaveanareaof11,522squarefeetandTractBwouldhaveanareaof9,291squarefeetAccessforthenewlotswouldbeprovidedviaanewprivatestreet(TractB)offofUnionAvenueNE.Theapplicantisproposingtodedicate8.5feetofright-of-wayalongUnionAvenueNE.Thegroundsurfacegenerallyslopesfromeasttowestatagradeoflessthan10percent.Atotalof24significanttreeshavebeenidentifiedontheprojectsite,notreesareproposedforretention.Theapplicantisproposingtoreplantatotalof102-inchminimumcalipertreesSHPLReport14-00091S CityofRentonDepartmentofCommunity&EconomicDevelopmentAdministrativeShortPlotReport&Decisiar2001UNIONAVESHCRTPLATLUAI40009IG.SHPL-AReportofSeptember12,2014Page4of20withinthefrontyardareasoftheproposedlots.A10-footlandscapestripisproposedalongtheprojectsite’sUnionAvenueNEstreetfrontage.2.EnvironmentalReviewExceptwhenlocatedonlandscoveredbywaterorsensitiveareas,shortplatsareexemptfromSEPAEnvironmentalReviewpursuanttoWAC197-11-800(6)(a).3.compliancewithERCConditionsN/A4.StaffReviewcommentsRepresentativesfromvariouscitydepartmentshavereviewedtheapplicationmaterialstoidentifyandaddressissuesraisedbytheproposeddevelopment.Thesecommentsarecontainedintheofficialfile,andtheessenceofthecommentshavebeenincorporatedintotheappropriatesectionsofthisreportandtheDepartmentalRecommendationattheendofthisreport.4.consistencywithShortPlatCriteriaSHORTPIATREVIEWCRITERIA:Approvalofashortplatisbaseduponseveralfactors.Thefollowingshortplatcriteriahavebeenestablishedtoassistdecision-makersinthereviewoftheplat.(VCompliant;Note1:Partiallycompliant;Note2:Notcompliant;Note3:Compliancenotyetdemonstrated)1.CONFORMANCEWITHTHECOMPREHENSIVEPLAN:ThesitehastheComprehensiveLandUsedesignationofResidentialSingleFamily(RSF).LanddesignatedRSFisintendedtobeusedforhighqualitydetached,single-familyresidentialdevelopmentorganizedintoneighborhoodsaturbandensities.Itisintendedthatlargersubdivisions,infilldevelopmentandrehabilitationofexistinghousingbecarefullydesignedtoenhanceandimprovethequalityofsinglefamilylivingenvironments.TheproposalisconsistentwiththefollowingComprehensivePlanLandUseandCommunityDesignElementpolicies,ifallconditionsofapprovalaremetunlessnotedotherwise:VPolicyLU-iSS.Netdevelopmentdensitiesshouldfallwithinarangeof4.0to8.0dwellingunitsperacreinResidentialSingleFamilyNeighborhoods.VPolicyCD-14.Infilldevelopment,definedasnewshortplatsofnineorfewerlots,shouldbeencouragedinordertoaddvariety,updatedhousingstock,andnewvitalitytoneighborhoods.VPolicyCD-iS.Infihldevelopmentshouldbereflectiveoftheexistingcharacterofestablishedneighborhoodsevenwhendesignedusingdifferentarchitecturalstyles,andbrrespondingtomoreurbansetbacks,heightorlotrequirements.InfilIdevelopmentshoulddrawonelementsofexistingdevelopmentsuchasplacementofstructures,vegetation,andlocationofentriesandwalkways,toreflectthesiteplanningandscaleofexistingareas.SHPLReport14-000916 CityofRentonDeportmentofCommunity&EconomicDevelopmentAdministrativeShortFlatReport&Decision2001UNIONAVESHORTPMTLUAI4-000916.SHPL-AReportofSeptember12,2014Page5of202.COMPUANCEWITHThEUNDERLYINGZONINGDESIGNATION:ObjectivesandpoliciesoftheComprehensiveLandUsePlanRSFdesignationareimplementedbyResidential8zoning(R-8).RMC4—2-11OAprovidesdevelopmentstandardsfordevelopmentwithintheR-8zoningclassification.Theproposalisconsistentwiththefollowingdevelopmentstandardsifallconditionsofapprovalaremetunlessnotedotherwise:VDensity:ThealloweddensityrangeintheR-8zoneisaminimumof4.0toamaximumof8.0dwellingunitsperacre.Netdensityiscalculatedafterthedeductionofsensitiveareas,areasintendedforpublicright-of-way,andprivateaccesseasements.StaffComment:Forthepurposesofcalculatingnetdensity1,029squarefeetofright-of-waydedicationand9,291squarefeetofprivatestreetareaarerequiredtobedeductedfromthegrosssiteareaof49,093squarefeet,resultinginanetareaof10,320squarefeet(0.89acres).Basedantheproposalfor5lots,thenetdensitywouldbe5.62dwellingunitspernetacre,whichiswithinthealloweddensityrangefortheR-8zone.“LotDimensions:ProposedLotsLotSizeWidthDepth4,500SFminimum50feetminimum65feetminimum(60feetforcornerlots)Lot17,606sf30.00feet95.11feetLot24,831Sf51.00feet95.05feetLot34,829sf51.00feet95.01feetLot44,982sf60.00feet94.98feetLotS4,972sf60.00feet94.90feet•TractA11,522sfN/AN/ATractB9,291sfN/AN/ANote3Setbacks:TherequiredsetbacksintheR-8zoneareasfollows:frontyardis15feetfortheprimarystructureand20feetforanattachedgarage,sideyardisfivefeetsideyardalongthestreetoraccesseasementis15feetfortheprimarystructureand20feetforanattachedgarageandtherearyardis20feet.StaffComment:A26-footwideprivatestreetisproposedtoprovideaccesstothenewlots.Anexistingsinglefamilyresidenceanddetachedgarageareproposedtoberemoved.ThefrontyardofproposedLot1wouldbeorientedtotheeasttowardsUnionAvenueNE.thefrontyardsofLots2-5wouldbeorientedtothesouthtowardstheprivatestreet.Asproposedthenewlotswouldprovideadequateareaforcompliancewiththerequiredsetbacks.Staffrecommendsasaconditionofapprovalthatademolitionpermitbeobtainedandallinspectionsandapprovalscompletedfortheremovaloftheexistingsinglefamilyresidenceanddetachedgaragepriortotherecordingofthefinalshortplat.Note3BuildingStandards:TheR-8zoningrequirementformaximumbuildingheightis30feet.Themaximumbuildingcoverageforlots5,000squarefeetorgreateris35percentor2,500squarefeetwhicheverisgreater.SHPLReport14-000916 CityofRentonDepartmentofCommunity&EconomicDevelopmentAdministrative5hortPlotReport&Decision2001UNiONAVESHORTflATLUAJ4-000916,SHPL-AReportofSeptember12,2014Page6of20StaffComment:Buildingheightandlotcdverageforthenewsinglefamilyresidenceswouldbeverifiedatthetimeofbuildingpermitreview.Note1Landscaping:TheCity’slandscaperegulations(RMC4-4-070)requireallshortplatstoprovidea10-footlandscapestripalongallpublicstreetfrontages.StaffComment:Aconceptuallandscapeplan(Exhibit5)wassubmittedaspartoftheproposedlanduseapplication.Theprojectsiteiscurrentlyvegetatedwithatotalof24trees,lawn,andotherornamentalvegetation.Noneoftheexistingtreesareproposedtoremain(seefurtherdiscussionbelowunderTreeRetention).Theconceptuallandscapeplan(ExhibitS)showsa10-footwidelandscapedstripalongUnionAvenueNEandtwoTridentMapletreeswithinthefrontyardareasoftheproposedlots.Noplantingplanwasincludedontheconceptuallandscapeplanforthe10-footlandscapedstrip.StaffrecommendsasaconditionofapprovalthatadetailedlandscapeplanbesubmittedatthetimeofConstructionPermitapplicationforreviewandapprovalbythePlanningDivisionprojectmanager.The10-footlandscapedstripshallbeinstalledpriortofinalshortplatapprovalandthefrontyardtreesshallbeinstalledpriortofinalinspectionforthenewsinglefamilyresidences.Note1TreeRetention:TheCity’sadoptedTreeRetentionandLandClearingRegulationsrequiretheretentionof30percentoftreesinaresidentialdevelopment.StaffComment:Thereareatotalof24significanttreeslocatedontheprojectsite.Ofthose4arelocatedwithinanareatobededicatedasright-of-wayalongUnionAveNE,and6arelocatedwithintheproposedprivatestreetwhichresultsinatotalof14protectedtreesremainingontheprojectsite.Notreesareproposedforretention.TocomplywiththeTreeRetentionrequirements,theapplicantwouldberequiredtoreplant24minimum2-inchcalipertreesaroundtheprojectsite.Theproposalincludesthereplacementof102-inchcalipertrees,thereforeanadditional142-inchcalipertreesarerequiredtocomplywiththeTreeRetentionrequirements.StaffrecommendsasaconditionofapprovalthatarevisedTreeRetentionplanincompliancewiththeCity’sadoptedTreeRetentionandLandClearingRegulationsbesubmittedatthetimeofConstructionPermitapplicationforreviewandapprovalbythePlanningDivisionprojectmanager.Note3Parking:Parkingregulationsrequirethataminimumoftwoparkingspacesbeprovidedforeachdetacheddwelling.Asproposed,eachlotwouldhaveadequateareatoprovidetwooff-streetparkingspaces.Compliancewiththeparkingrequirementswouldbeverifiedatthetimeofbuildingpermitreview.Drivewaycutsarerequiredtobeaminimumof5feetfrompropertylinesandnewdrivewaysmaybeamaximumof16feetinwidthatthepropertyline.StaffComment:Compliancewithdrivewaystandardswouldbeverifiedatthetimeofbuildingpermitreview.CriticalAreas:TheprojectsiteislocatedwithinanAquiferProtectionArea2,seefurtherdiscussionbelowunderstormwater.3.DESIGNSTANDARDS:ResidentialDesignandOpenSpaceStandards(RMC4-2-115)areapplicableintheR-Szone-TheStandardsimplementpoliciesestablishedintheLandUseand5HPLReport14-000916 CityofRentonDepartmentofcommunity&EconomicDevelopmentAdministrativeShortFlatReport&Decision2001UNIONAVESHORTPMTLUAI4-000916,SHPL-AReportofSeptember12,2014Page7of20CommunityDesignElementsoftheComprehensivePlan.CompliancewithSiteDesignStandardsmustbedemonstratedpriortoapprovalofthesubdivision.CompliancewithResidentialDesignStandardswouldbeverifiedpriortoissuanceofbuildingpermits.Theproposalisconsistentwiththefollowingdesignstandards,unlessnotedotherwise:LotConfiguration:Oneofthefollowingisrequired:1.Lotwidthvariationof10feet(10’)minimumofoneperfour(4)abuttingstreet-frontinglots,or2.Minimumoffour(4)lotsizes(minimumoffourhundred(400)grosssquarefeetsizedifference),or3.Afrontyardsetbackvariationofatleastfivefeet(5’)minimumforatleasteveryfour(4)abuttingstreetfrontinglots.StaffComment:Asproposedtheshortplatwouldcomplywithrequirementnumber1.ProposedLot1wouldhavealotwidthof95feetLot2and3wouldhavewidthsof51feetandLots4and5wouldhavewidthsof60feet.ThedifferenceinwidthbetweenLotIandLots2-5wouldexceed10feet.Note3Garages:Oneofthefollowingisrequired;thegarageis:1.Recessedfromthefrontofthehouseand/orfrontporchatleasteightfeet2.2.Locatedsothattheroofextendsatleastfivefeet(5’)(notincludingeaves)beyondthefrontofthegarageforatleastthewidthofthegarageplustheporch/stooparea,or3.Alleyaccessed,or4.Locatedsothattheentrydoesnotfaceapublicand/orprivatestreetoranaccesseasement,or5.Sizedsothatitrepresentsnogreaterthanfiftypercent(50%)ofthewidthofthefrontfacadeatgroundlevel,or6.Detached.Theportionofthegaragewiderthantwentysix-feet(26’)acrossthefrontshallbesetbackatleasttwofeet(2’).StaffComment:Complianceforthisstandardwouldbeverifiedatthetimeofbuildingpermitreview.Note3PrimaryEntry:Oneofthefollowingisrequired:1.Stoop:minimumsizefourfeetbysixfeet(4x6’)andminimumheighttwelveinches(12”)abovegrade,or2.Porch:minimumsizefivefeet(5’)deepandminimumheighttwelveinches(12”)abovegrade.Exception:incaseswhereaccessibility(ADA)isapriority,anaccessibleroutemaybetakenfromafrontdriveway.StaffComment:Complianceforthisstandardwouldbeverifiedatthetimeofbuildingpermitreview.5HPLReport14-000916 CityofRentonDepartmentofCommunity&EconomicDevelopmentAdministrativeShortP/atReport&Decision2001UNIONAVESHORTPLATLUAI4-000916,SHPL-AReportofSeptember12,2014Page8of20Note3FaçadeModulation:Oneofthefollowingisrequired:1.Anoffsetofatleastonestorythatisatleasttenfeet(10’)wideandtwofeet(2’)indepthonfacadesvisiblefromthestreet,or2.Atleasttwofeet(2)offsetofsecondstoryfromfirststoryononestreetfacingfacade.StaffComment:Complianceforthisstandardwouldbeverifiedatthetimeofbuildingpermitreview.Note3WindowsandDoors:Windowsanddoorsshallconstitutetwenty-fivepercent(25%)ofallfacadesfacingstreetfrontageorpublicspaces.StaffComment:Complianceforthisstandardwouldbeverifiedatthetimeofbuildingpermitreview.N/AScale,Bulk,andCharacter:N/ANote3Roofs:Oneofthefollowingisrequiredforalldevelopment:1.Hiporgabledwithatleastasixtotwelve(6:12)pitchfortheprominentformoftheroof(dormers,etc.,mayhavelesserpitch),or2.Shedroof.Additionally,forsubdivisionsgreaterthannine(9)lots:Avarietyofroofformsappropriatetothestyleofthehomeshallbeused.StaffComment:Complianceforthisstandardwouldbeverifiedatthetimeofbuildingpermitreview.Note3Eaves:Bothofthefollowingarerequired:1.Eavesprojectingfromtheroofoftheentirebuildingatleasttwelveinches(12”)withhorizontalfasciaorfasciagutteratleastfiveinches(5”)deeponthefaceofalleaves,and2.Rakesongableendsmustextendaminimumoftwoinches(2”)fromthesurfaceofexteriorsidingmaterials.StaffComment:Complianceforthisstandardwouldbeverifiedatthetimeofbuildingpermitreview.Note3ArchitecturalDetailing:Ifonesidingmaterialisusedonanysideofthedwellingthatistwostoriesorgreaterinheight,ahorizontalbandthatmeasuresatleasteightinches(8”)isrequiredbetweenthefirstandsecondstory.Additionally,oneofthefollowingisrequired:1.Threeandonehalfinch(31/2”)minimumtrimsurroundsallwindowsanddetailsalldoors,or2.Acombinationofshuttersandthreeandonehalfinches(31/2”)minimumtrimdetailsallwindows,andthreeandonehalfinches(31/2”)minimumtrimdetailsalldoors.StaffComment:Complianceforthisstandardwouldbeverifiedatthetimeofbuildingpermitreview.SKPLReport14-000916 cityofRentonDepartmentofCommunity&EconomicDevelopmentAdministrativeShortFlatReport&Decision2001UNiONAVESHORTPMT1U414-000916,5ffPL-AReportofSeptember12,2014Page9of20Note3MaterialsandColor:Forsubdivisionsandshortplats,abuttinghomesshallbeofdifferingcolor.Colorpalettesforallnewdwellings,codedtothehomeelevations,shallbesubmittedforapproval.Additionally,oneofthefollowingisrequired:1.Aminimumoftwo(2)colorsisusedonthehome(bodywithdifferentcolortrimisacceptable),or2.Aminimumoftwo(2)differingsidingmaterials(horizontalsidingandshingles,sidingandmasonryormasonry-likematerial,etc.)isusedonthehome.Onealternativesidingmaterialmustcompriseaminimumofthirtypercent(30%)ofthestreetfacingfacade,Ifmasonrysidingisused,itshallwrapthecornersnolessthantwentyfourinches(24”).StaffComment:Complianceforthisstandardwouldbeverifiedatthetimeofbuildingpermitreview,4.COMPLIANCEWITHSUBDIVISIONREGULATIONS:RMC4-7Providesreviewcriteriaforproposedsubdivisions.Theproposedprojectisconsistentwiththefollowingsubdivisionregulationsifallconditionsofapprovalarecompliedwith:Note1Access:Theproposedlotswouldtakevehicularaccessviaa26-footwideprivatestreetoffofUnionAvenueNE,whichterminatesinahammerheadturnaround.PrivatestreetsarepermittedforaccessuptoamaximumofBlots.Upto4ofthelotsmayusethedrivewayasprimaryaccessforemergencies.Theprivatestreetshallbeaminimumof26feetinwidth,withamaximumof20feetofpaving.Hammerheadturnaroundsarerequiredfordeadendaccessstreetsbetween150and300feetinlength.Theproposedprivatestreetis250feetinlength,thereforeahammerheadturnaroundisrequired.Asproposea,theshortplatwouldcomplywiththeemergencyaccessrequirementsspecifiedbytheFireDeptAlllotsshouldgainaccessviatheprivateroad.NodirectaccessofthelotstoUnionAveNEisallowed.Theminimumseparationofaccessfromtheadjacentpropertylineis5feet.Theaccessasshownintheplansshallbemodifiedtoprovidethe5feetseparation.Theseparationdistancemustalsobelabeledintheplans.StaffrecommendsasaconditionofapprovalthatLot1berequiredtoobtainaccessfromtheprivatestreetAnotetothiseffectshallberecordedonthefaceoftheplat.Staffalsorecommendsasaconditionofapprovalthattheshortplatplanberevisedtoprovidetherequired5-footseparationbetweentheprivatestreetandtheadjacentpropertyline.TherevisedshortplatplanshallbesubmittedpriortofinalplatapprovalforreviewandapprovalbythePlanReviewsection.Note1Streets:UnionAvenueNEfrontingtheproposedprojectsiteisclassifiedasaminorarterialstreetandhasanexistingright-of-waywidthof60feet.AsperTransportationsection,theexistingpavedwidthonUnionAveNEfrontageissufficient.0.5feetwidecurb,8feetwidelandscapedplanter,8feetwidesidewalk,and1footwideclearspacebehindthesidewalkisrequiredtobeprovidedonthefrontagebythedeveloper.Theprojectrequiresthededicationof9.5feetofrightofway(subjecttofinalsurvey).The___ ___ _applicantmaysubmitanapplicationtotheCityrequestingawaiverofthestreetSHPLReport14-000916 CityofRentonDepartmentofCommunity&EconomicDevelopment2001UNIONAVESHORTPEATReportofSeptember12,2014AdministrativeShortFlatReport&DecisiodLUA14-O0O9lSHPL-APage10of20frontageimprovementsinUnionAvenueNEasoutlinedinRMC4-9-250C.5.d,sincethereareexistingfrontageimprovementsinthearea.StaffrecommendsasaconditionofapprovalthatarevisedshortplatplanbesubmittedatthetimeofConstructionPermitreviewshowingtherequired9.5feetofrightofwaydedicationforreviewandapprovalbythePlanReviewsection.TheapplicantshalleithersubmitengineeringplansshowingtherequiredfrontageimprovementsalongUnionAvenueNEorshallsubmitawaiverrequestforthestreetfrontageimprovementsandreceiveapprovalfromtheDepartmenttoCommunityandEconomicDevelopmentpriorattothetimeofConstructionPermitapplicationissuance.Blocks:Nonewblockswouldbecreatedasaresultoftheproposedsubdivision.Theproposedshortplatwouldbeconsistentwithdevelopmentpatternsinthesurroundingarea.Lots:Thesize,shape,orientation,andarrangementoftheproposedlotscomplywiththerequirementsoftheSubdivisionRegulationsandtheDevelopmentStandardsoftheR-8zoneandallowforreasonableinfillofdevelopableland.Alloftheproposedlotsmeettherequirementsforminimumlotsize,depth,andwidth.Alloftheproposedlotsarerectangularinshape.ThefrontyardofLot1wouldbeorientedtotheeasttowardUnionAvenueNEandthefrontyardsofLots2-5wouldbeorientedtothesouthtowardsthenewprivatestreetStaffrecommendsasaconditionofapprovalthatthefrontyardofLot1beorientedtotheeasttowardUnionAvenueNEinordertomaintaintheexistingdevelopmentpatternofthesurroundingneighborhood.Note1TopographyandVegetation:Thegroundsurfaceisrelativelyflatwithslightslopesfromeasttowestatagradeoflessthan10percentThereareatotalof24significanttrees,-lawn,andornamentalvegetationontheprojectsite.Therearenotreesproposedforretention.SeepreviousdiscussionaboveunderLandscapingandTreeRetention.S.AVAILABILITYANDIMPACTONPUBLICSERVICES:“Police:Policestaffindicatesthattherewouldbeminimalimpactonpoliceservicesasaresultoftheproposedsubdivisionandsufficientresourcesexisttofurnishservicestotheproposeddevelopment.Note3Fire:FirePreventionstaffindicatesthatsufficientresourcesexisttofurnishservicestotheproposeddevelopment.Thefireflowrequirementforasinglefamilyhomeis1,000gpmminimumfordwellingsupto3,600squarefeet(includinggarageandbasements).Ifthedwellingexceeds3,600squarefeet,aminimumof1,500gpmfireflowwouldberequired.Aminimumofonefirehydrantisrequiredwithin300-feetoftheproposedbuildingsandtwohydrantsifthefireflowgoesupto1,500gpm.Thereisoneexistingfirehydrantthatcanbecountedtowardtherequirement;ftdoesnothavetherequiredstorzfittinghowever.Aminimumofonenewhydrantandawatermainextensionwillberequired.Itappearsthereisadequatefireflowinthisarea.FireDepartmentapparatusaccessroadwaysarerequiredtobeminimum20-feetwidefullypaved,with25-feetinsideand45-feetoutsideturningradius.Fireaccessroadwaysshallbeconstructedtosupporta30-tonvehiclewith322-psipointloading.Accessisrequiredwithin150-feetofallpointsonthebuildings.ApprovedapparatusturnaroundsYeSHPLReport14-000916 CityofRentonDepartmentofCommunity&EconomicDevelopmentAdministrativeShortPlatReport&Decision2001UNiONAVESHORTPMTLUA14-000916,SHPL-AReportofSeptember12,2014Page11of20arerequiredfordeadendroadsexceeding150-feet.Hammerheadturnaroundsareallowedfordeadendstreetsupto300-feetlong-Accessasproposedappearsadequate.AFireImpactFeeforthefuturehousesonProposedLots2-5wouldbepayableatthetimeofbuildingpermitissuance.Thecurrent2014FireImpactFeeis$479.28;thefeeineffectatthetimeofbuildingpermitapplicationwouldbeappliedtothisproject.Schools:TheRentonSchoolDistricthasindicatedthatitcanaccommodatetheimpactofadditionalstudentsexpectedtocomefromtheproposedprojectatSierraHeightsElementarySchool,McKnightMiddleSchool,andHazenHighSchool.StudentsattendingMcKnightMiddleSchoolwouldbebussedtoschoolfromtheexistingstoplocated0.3mflestothenorthattheintersectionofNE21StreetandUnionAvenueNE.Togettothisbusstop,studentswouldwalkalongtheexistingsidewalkonUnionAvenueNEtothenorthtoNE2fStreet.StudentsattendingSierraHeightsElementaryandHazenHighSchoolwouldwalktoschool.StudentswalkingtoSierraHeightsElementarywouldwalkalongtheexistingsidewalksonUnionAvenueNEtothenorthtoSierraHeightsElementary.StudentswalkingtoHazenHighSchoolwouldwalksouthalongthesidewalksonUnionAvenueNEtoNESunsetBlvdwheretheywouldcrossSunsetandwalkeastalongthesidewalksonNESunsetBlvdtoHoquiamAvenueNEwheretheywouldturnandwalksouthalongtheshouldertoHazenHighSchool.ThecurrentRentonSchoolDistrictImpactFeeis$5,455.00.TheRentonSchoolImpactFeeWouldapplytothenewhousesonProposedLots2-5andwouldbepayableatthetimeofbuildingpermitissuance;thefeeineffectatthetimeofbuildingpermitapplicationwouldbeappliedtothisproject.Parks:AParkImpactFeewouldberequiredforthefuturehousesonProposedLots2-5.ThecurrentParkImpactFeeis$963.01.Thefeeineffectatthetimeofbuildingpermitapplicationisapplicabletothisprojectandispayableatthetimeofbuildingpermitissuance.Note3Stormwater:Thereisan18”diameterstormdrainagelineinUnionAveNE.AgeotechnicalreportpreparedbyGeoResource5LLC(Exhibit7)hasbeensubmittedfortheproject.Thereport(Exhibit7)mentionsthatlimitedinfiltrationofstormwaterisfeasibleintheon-sitesoils.Eventhoughthegeotechreport(Exhibit7)recommendspeMouspavementtobeconsideredfortheshareddriveway/privateroad,theCitydoesnotallowperviouspavementonprivatestreets/shareddriveway.Adrainagereport(ExhibitS)hasbeensubmittedbyToumaEngineerswiththelanduseapplication.BasedontheCity’sflowcontrolmap,thissitefallswithintheFlowcontrolDurationStandardForestedsiteconditionsareaandthedrainagereport(ExhibitS)submittedwiththeutilityconstructionpermitmustrefertoit.Theprojectproposesanopenpondtoservebothdetentionandwaterqualitytreatmentrequirements.Thesideslopes(interiorandexterior)ofthepondshallnotexceedthreefeethorizontaltoonefootvertical,orverticalwallsarerequired.A15-footwidelandscapedstripisrequiredaroundthepond.Afenceisrequiredaroundthepond.SetbacksandeasementsregardingstormwaterfacilitiesshouldbeprovidedaspertheCityAmendments.Thedrainagereport(ExhibitS)shouldclearlyshowtheinformationoftherequiredfrontageimprovementsandincludeitinthe_calculations.Thereport(ExhibitS)mentionsthatV5HPLReport14-000916 CityofRentonDepartmentofCommunity&EconomicDevelopmentAdministrativeShortPlotReport&Decisioci2001UNIONAVESHORTPMTLUAI4-000916,SHPL-AReportofSeptember12,2014Page12of20thewaterqualitysystemswillbedesignedusingthekentonamendmentofthe2009KingCountySurfaceWaterDesignManual.Thesubmitteddrainagereport(Exhibits)includestheScorerequirements,butincludesonly5specialrequirements.Thespecialrequirement#6regardingAquiferProtectionAreashouldbeincludedinthedrainagereportsubmittedwiththeutilityconstructionpermitThesitefallsintheAquiferProtectionAreaZone2,thereforetheopenpondsrequirealinerinaccordancewithdesigncriteriainsection6.2.4oftheCityAmendments,andopenconveyancesrequirealinerinaccordancewithSection1.2.4.3oftheCityAmendments.DrainageplansandafinaldrainagereportbasedontheCityadopted2009SurfaceWaterDesignManualAmendmentandthe2009KingCountySurfaceWaterDrainageisrequiredtobesubmittedwiththeConstructionpermit.Thedrainagereportsubmittedwiththeconstructionpermitmustincludedescribethedownstreamanalysisaswellastheevaluationoftheupstreamdrainagesystem.ThedrainagereportandplansmustincludeinformationoftheindividuallotstormwaterBMP5.Allstormwaterrequirementsasperthe2009SurfaceWaterDesignManualAmendmentandthe2009KingCountySurfaceWaterDrainageManualisrequiredtobeprovidedbytheproject.StaffrecommendsasaconditionofapprovalthatarevisedlandscapeplanbesubmittedatthetimeofConstructionPermitreviewshowingtherequired15-footwidelandscapestriparoundthestormwaterpond.ThelandscapeplanshallbesubmittedtotheCurrentPlanningprojectmanagerforreviewandapproval.Thelandscapingshallbeinstalledpriortotherecordingofthefinalshortplat.Surfacewatersystemdevelopmentfeeis$1,228.00pernewlotFeesarepayablepriortoissuanceoftheconstructionpermit.Creditwillbegiventotheexistinghome.AConstructionStormwaterGeneralPermitfromDepartmentofEcologywillberequiredsincegradingandclearingofthesiteexceedsoneacre.Note3WaterService:ThesiteisloéatedintheCityofRentonwaterservicearea.Thereisa12-inchdiameterCitywatermainanda36-inchdiameterSeattlePublicUtilitywatermainalongtheUnionAvefrontage.Theprojectproposestheextensionofan8-inchwatermainwithintheproposedprivateroadoftheshortplat,extendingfromtheexistingwatermainonUnionAveNEuptothewestpropertylineoftheshortplat.Thewatermainmustbelocatedwithinthepavedaccessandmustbelocatedataminimumseparationof4feetfromthepavededge.SincetheproposedwatermainextensionwillcrosstheSeattlePublicUtility36-inchdiameterwatermainonUnionAveNE,theapplicantwillhavetocontacttheSeattlePublicUtilityregardingtheirclearancerequirements.Theprojectincludestheinstallationofafirehydrantnearthehammerheadoftheproposedprivateroad.AnadditionalfirehydrantisrequiredattheintersectionoftheproposedprivateroadwithUnionAveNE.Separatedomesticwatermeters,minimum1-inch,arerequiredtoserveeachsinglefamilylot.Civilplansforthewatermainextensionwillberequiredandmustbepreparedbya____ _ _ _registeredprofessionalengineerintheStateofWashington.Minimumhorizontal5HPLReport14-000916 CityofRentonDepartmentofCommunity&EconomicDevelopmentAdministrativeShortPlotReport&Decision2001UNIONAVESHORTPMTLUAI#000916,SHPL-AReportofSeptember12,2014Page13of20clearancebetweenwaterandstormwaterlinesis10feet.Minimumverticalclearancebetweenwaterandstormwaterlinesis18inches.Water5DCfee(2014rates)foror1-inchmeterinstallis$2,809.00.Thesefeesarecollectedatthetimeaconstructionpermitisissuedandtherateprevalentattimeofconstructionpermitwillbeapplicable.Note3SanitarySewerService:ThesiteislocatedinthecityofRentonsewerservicearea.Thereisexisting8”diametersewermainalongtheUnionAvefrontage.Theproposedconceptualutilityplanincludesextendingthesewermain,withintheshortplat,totheeasternboundaryofLot5.A10feetwidesanitarysewerpubliceasementisproposedforthesewerservice.Additionally,a10-footwidepublicsewereasementisrequiredtobeprovidedthatwillextendtothewestpropertylineoftheshortp1st.ACityofRentonPublicUtilityeasementisrequiredovertheentireprivateroadandextendinguptothewestpropertylineoftheshortplat.Systemdevelopmentfee(SDC)forsewerisbasedonthesizeofthenewdomesticwatertoservethehousesoneachlot.Sewer5DCfee(2014rates)foror1-inchmeterinstallis$2,033.00.Thesefeesarecollectedatthetimeaconstructionpermitisissuedandtherateprevalentattimeofconstructionpermitwillbeapplicable.Note3Transportation:SeepreviousdiscussionaboveunderAccessandStreets.ATransportationImpactFeeforthenewhousesonProposedLots2-5wouldbepayableatthetimeofbuildingpermitissuance;thefeeineffectatthetimeofbuildingpermitapplicationwouldbeappliedtothisproject.The2014TransportationImpactFeeis$1,430.72.H.FINDINGS:Havingreviewedthewrittenrecordinthematter,theCitynowentersthefollowing:1.Request:Theapplicantisrequestingapprovalofa5-lotshortplatona49,093squarefootsite.Theprojectwouldhaveanetdensityof5.62dwellingunitsperacre.2.Application:Thesubjectpropertyislocatedat2001UnionAvenueNE.3.ComprehensivePlan:ThesubjectpropertyisdesignatedasResidentialSingleFamily(RSF)intheComprehensivePlan.TheproposedprojectwouldsatisfytheobjectivesandpoliciesoftheLandUse,CommunityDesign,andEnvironmentalElementsoftheComprehensivePlan,ifallconditionsarecompliedwith.4.Zoning:TheproposedprojectsiteiszonedResidential—Sdwellingunitspernetacre(R-8).TheprojectasproposedwouldsatisfytheR-8standardsandregulations,ifallconditionsare.compliedwith.5.SubdivisionRegulations:TheprojectasproposedwouldsatisfytherequirementsofRMC4-7,SubdivisionRegulationsifallconditionsarecompliedwith.6.ExistingLandUses:Thesubjectpropertyhasanexistingsinglefamilyresidenceanddetachedgarage.Theexistingresidenceanddetachedgaragewouldberemovedpriortotherecordingoftheshortplat.5HPLReport14-000916 Gb,’ofRentos,DepartmentofCommunity&EconomicDevelopmentAdministrativeShortPlatReport&Decision2001UN(ONAVESHORTPLATLUAI4-000916,SHPL-AReportofSeptember12,2014Page14of207.Setbacks:Buildingsetbacksforthefuturehousesonthenewlotswouldbeverifiedatthetimeofbuildingpermitreview.8.SystemDevelopmentCharges:The2014SurfaceWaterSystemDevelopmentfeeis$1,128.00persingle-familylotSystemDevelopmentfee(SDC)forsewerisbasedonthesizeofthenewdomesticwatertoservethehousesoneachlot.SewerSDCfee(2014rates)foror1-inchmeterinstallis$2,033.00.WaterSDCfee(2014rates)foror1-inchmeterinstallis$2,809.00.9.PublicServices:TheproposedshortplathasbeenreviewedbyvariousCityDepartments.Thereareadequatepublicservicesandfacilitiestoaccommodatetheproposedshortplat.Transportation,Fire,andParkImpactfeesareapplicableforthefuturehousesonProposedLots2-5.Impactfeesareassessedatthetimeofbuildingpermitapplicationandarepayableatthetimeofbuildingpermitissuance.10.PublicUtilities:Water,sewer,andstormdrainagewouldbeprovidedbytheCityofRenton.11.Schools:TheRentonSchoolDistricthasindicatedthatadequateschoolfacilitiesareavailableatSierraHeightsElementary,McKnightMiddle,andHazenHighSchools.ARentonSchoolDistrictImpactFeewouldbeassessedatthetimeofbuildingpermitapplicationandwouldbepayableatthetimeofbuildingpermitissuance.12.SafeRoutestoSchools:ThereisasafewalkingroutetoSierraHeightsElementaryandHazenHighSchool.RentonSchoolDistrictbusserviceisavailabletoMcKnightMiddleSchool;thereisasafewalkingroutetothebusstoplocatedatNE21StreetandUnionAvenueNE.13.Topography/CriticalAreas:Thegroundsurfacegenerallyslopesfromeasttowestatagradeoflessthan10percent.TheprojectsiteislocatedwithinAquiferProtectionArea2,therearenoothercriticalareasmappedontheprojectsite.I.CONCLUSIONS:1.ThesubjectsiteislocatedintheResidentialSingleFamilyComprehensivePlandesignationandcomplieswiththegoalsandpoliciesestablishedwiththisdesignation.2.ThesubjectsiteislocatedintheResidential—8dwellingunitsperacre(R-2)zoningdesignationandcomplieswiththezoninganddevelopmentstandardsestablishedwiththisdesignationprovidedtheapplicantcomplieswithCityCodeandconditionsofapproval.3.Theproposed5-lotshortplatcomplieswiththesubdivisionregulationsasestablishedbyCityCodeandstatelawprovidedalladvisorynotesandconditionsarecompliedwith.4.Theproposed5-lotshortplatcomplieswiththestreetstandardsasestablishedbyCityCode,providedtheprojectcomplieswithalladvisorynotesandconditionsofapprovalcontainedherein.5.TheprojectsiteislocatedwithinAquiferProtectionAreaZone2.Theproposed5-lotshortplatcomplieswiththecriticalareasregulationsasestablishedbyCityCodeprovidedtheapplicantcomplieswiththeconditionsofapproval.5.Therearesafewalkingroutestoschooland/ortheschoolbusstop.7.Thereareadequatepublicservicesandfacilitiestoaccommodatetheproposedshortplat.SHPLReport14-000916 •CetyofRentonDepartmentofCommunity&EconomicDevelopmentAdmmistmtiveShortPIatReport&Decision2001UNIONAVESHORTPL’ITLUA14-000916,SHPL-AReportofSeptember12,2014Page15of20J.DECISION:The2001UnionAveShortPlat,FileNo.LUA14-000916,SHPL-A,isapprovedandissubjecttothefollowingconditions:1.ThefrontyardofthefuturesinglefamilyresidenceonproposedLot1shallbeorientedtotheeastandanotetothiseffectshallberecordedonthefaceoftheplat.2.Ademolitionpermitshallbeobtainedandallinspectionsandapprovalscompletedfortheremovaloftheexistingsinglefamilyresidenceanddetachedgaragepriortorecordingthefinalshortplat.-3.AdetailedlandscapeplanshallbesubmittedatthetimeofConstructionPermftapplicationforreviewandapprovalbythePlanningDivisionprojectmanager.The10-footlandscapedstripshallbeinstalledpriortofinalshortplatapprovalandthefrontyardtreesshallbeinstalledpriortofinaloccupancyforthenewsinglefamilyresidences.4.ArevisedTreeRetentionplanincompliancewiththeCity’sadoptedTreeRetentionandLandClearingRegulationsshallbesubmittedatthetimeofConstructionPermitapplicationforreviewandapprovalbytheCurrentPlanningprojectmanager.5.AccesstoLot1shallbeprovidedfromtheprivatestreet.Anotetothiseffectshallberecordedonthefaceoftheshortplat.5.Theshortplatplanshallberevisedtoprovidetherequired5-footseparationbetweentheprivatestreetandtheadjacentpropertyline.TherevisedshortplatplanshallbesubmittedpriortofinalplatapprovalforreviewandapprovalbythePlanReviewsection.7.ArevisedshortplatplanshallbesubmittedatthetimeofConstructionPermitreviewshowingtherequired9.5feetofrightofwaydedicationforreviewandapprovalbythePlanReviewsection.TheapplicantshalleithersubmitengineeringplansshowingtherequiredfrontageimprovementsalongUnionAvenueNEorshallsubmitawaiverrequestforthestreetfrontageimprovementsandreceiveapprovalfromtheDepartmenttoCommunityandEconomicDevelopmentpriortoConstructionPermitissuance.8.ArevisedlandscapeplanshallbesubmittedatthetimeofConstructionPermitreviewshowingtherequired15-footwidelandscapestriparoundthestormwaterpond.ThelandscapeplanshallbesubmittedtotheCurrentPlanningprojectmanagerforreviewandapprovalpriortoconstructionpermitissuance.Thelandscapingshallbeinstalledpriortotherecordingofthefinalshortplat.DATEOFDECISIONONlANDUSEACTION:SIGNATURE:JenniferHenning,PlanningDirectorDateSHPLReport14-000916 CityofRentonDepartmentofCommunity&EconomicDevelopmentAdministrativeShortPiatReport&Decision2001UNIONAVESHORTflATLUA14000916,SHPL-AReportofSeptember12,2014Page16of20TRAN5MflTEDthis12thdayofSeptember,2014totheContact/Applicant/Cwnerfr):Contact:Applicant/Owner:DanThumaKusha!VannaandKaja!RumToumaEngineering2016lincolnAvenueNE2555W4fStreetRenton,WA98056-Renton,WA98057TRANSMI7TEDthis12thdayofSeptember,2014tothePanicsofRecord:NoPartiesofRecordTRANSMIUEDthis12thdayofSeptember,2014tothefollowing:CE.“Chip”VincentCEDAdministratorSteveLee,DevelopmentEngineeringManagerJanConklin,DevelopmentServicesVanessaDolbee,CurrentPlanningManagerFireMarshalK.LANDUSEACUONAPPEALS;REQUESTFORRECONSIDERATION,&EXPIRATION:Theadministrativelandusedecisionwillbecomefinalifthedecisionisnotappealedwithin14daysofthedecisiondate.APPEAL.:ThisadministrativelandusedecisionwillbecomefinalifnotappealedinwritingtotheHearingExamineronorbefore5:00PMonSeptember26,2014.Anappealofthedecisionmustbefiledwithinthe14-dayappealperiod(RCW43.2tC.075(3);WAC197-11-680),togetherwiththerequiredfeetotheHearingExaminer,CityofRenton,1055SouthGradyWay,Renton,WA98057.RMC4-8-l10.BgovernsappealstotheHearingExaminerandadditionalinformationregardingtheappealprocessmaybeobtainedfromtheCityClerk’sOffice,(425)430-6510.EXPIRATION:TheadministrativeshortpEatdecisionwillexpiretwo(2)yearsfromthedateofdecision.Asingleone(1)yearextensionmayberequestedpursuanttoRMC4-7-070.M.CRECONSIDERATION:Within14daysofthedecisiondate,anypartymayrequestthatthedecisionbereopenedbytheapprovalbody.Theapprovalbodymaymodifyhisdecisionifmaterialevidencenotreadilydiscoverablepriortotheoriginaldecisionisfoundorifhefindstherewasmisrepresentationoffad.Afterreviewofthereconsiderationrequest,iftheapprovalbodyfindssufficientevidencetoamendtheoriginaldecision,therewillbenofurtherectensionoftheappealperiod.Anypersonwishingtotakefurtheractionmustfileaformalappealwithinthe14-dayappealtimeframe.THEAPPEARANCEOFFAIRNESSDOCTRINE:providesthatnoexparte(privateone-on-one)communicationsmayoccurconcerningthelandusedecision.TheDoctrineappliesnotonlytotheinitialdecision,buttoAppealstotheHearingExamineraswell.Allcommunicationsafterthedecision/approvaldatemustbemadeinwritingthroughtheHearingExaminer.Allcommunicationsarepublicrecordandthispermitsallinterestedpartiestoknowthecontentsofthecommunicationandwouldallowthemtoopenlyrebuttheevidenceinwriting.AnyviolationofthisdoctrinecouldresultintheinvalidationoftheappealbytheCourt.SHPLReport14-000916 DEPARTMENTOFCOMMUNITYANDECONOMICDEVELOPMENTic&(’iflflI(Oüfl[ADVISORYNOTESToAPPLICANTThefollowingnotesaresupplementalinformationprovidedinconjunctionwiththeadministrativelanduseaction.Becausethesenotesareprovidedasinformationonly,theyarenotsubjecttotheIappealprocessforthelanduseactions.Planning:Ii.Constructionactivitiesshallberestrictedtothehoursof7:00amto8:00pm,MondaythroughFriday.WorkonSaturdaysshallbebetweenthehoursof9:00amand8:00pm.NoworkshallbepermittedonSundays.2.RMC4-4-030C.2limitshaulhoursbetweenthehoursof8:30amand3:30pm,MondaythroughFridayunlessotherwiseapprovedbytheDepartmentofCommunityandEconomicDevelopment.ITechnicalServices:1.NotetheCityofRentonlanduseactionnumberandlandrecordnumber,LUA14-000916andLND20-0607,respectively,onthefinalshortplatsubmittal.ThetypesizeusedforthelandrecordInumbershouldbesmallerthanthatusedforthelanduseactionnumber.2.ShowtwotiestotheCityofRentonSurveyControlNetwork.Monuments#1325&#159shownIarenotcoordinatedhorizontalcontrolmonuments;theyarebenchmarks(verticalcontrol)only.Thegeometrywillbecheckedbythecitywhenhorizontalcontroltieshavebeenprovided.3•providesufficientinformationtodeterminehowtheplatboundarywasestablished.4.ThetitlereportdidnotincludeacopyoftheparentshortplatasrecordedunderKingCountyRec.No.7712130605,pleaseprovide.1Provideshortplatandlotclosurecalculations.6.Notewhatwasfoundwhenvisitingtheexistingmonuments.I7.Indicatewhathasbeen,oristobe,setatthecornersoftheproposedlots.8.Notediscrepanciesbetweenbearingsanddistancesofrecordandthosemeasuredorcalculated,ifany.9.Noteaddressesfromtheattachedonthefinalshortplatdrawing.10.Donoteencroachments,ifany.Iii.Doincludea“LEGEND”blockfortheshortplatdrawing,detailinganysymbolsusedthereon.12.Notealleasements,covenantsandagreementsofrecordonthedrawing.13.Noteanyrelevantresearchedresourcesontheshortplatsubmittal.I14.NotetheplatnameandJotandtractnumbersoftheadjoiningpropertiesornoteas“Unplaffed.”is.TheCityofRentonAdministrator,PublicWorksDepartment,istheonlycityofficialwhosignstheIfinalshortplat.Provideanappropriateapprovalblockandsignatureline.PertinentKingCountyapprovalblocksalsoneedtobenotedonthedrawing.16.Allvestedowner(s)ofthesubjectfinalshortplatneedtosignthefinalshortplatdrawing.IncludeInotaryblocksasneeded.17.BecausethesubjectpropertyfallswithinZone2oftheCityofRentonAquiferProtectionArea,theIAquiferProtectionNoticeneedstobenotedonthedrawing.AQUIFERPROTECTIONNOTICEThelotscreatedhereinfallwithinZone2ofRenton’saquiferprotectionareaandaresubjecttotheIrequirementsoftheCityofRentonOrdinance#4367.Thiscity’ssolesourceofdrinkingwaterisSHPLReport14-000916916 •CityofRentonDepartmentofCommunity&EconomicDevelopmentAdministrativeShortPlatReport&Decision2001UN!ONAVESHORTPMTLUAI4-000916,SHPL-AReportofSeptember12,2014Page18of20suppliedfromashallowaquiferunderthecitysurface.Thereisnonaturalbarrierbetweenthewatertableandgroundsurface.Extremecareshouldbeexercisedwhenhandlingofanyliquidsubstanceotherthanwatertoprotectfromcontactwiththegroundsurface.Itistheresponsibilityofthehomeownerstoprotectthecity’sdrinkingwater.j18.Notethatifthereareeasements,restrictivecovenantsoragreementstoothers(CityofRenton,etc.)aspartofthissubdivision,theycanberecordedconcurrentlywiththefinalshortplat.Thefinalshortplatdrawingandtheassociateddocument(s)aretobegiventotheProjectManagerasapackage.Therecordingnumber(s)fortheassociateddocument(s)aretobereferencedonthefinalshortplatdrawing.Providespacesfortherecordingnumbersthereof.19.ItisnotclearthattheDeclarationofCovenantblockisappropriateastherearenonewprivateeasementsshownontheshortplat.TheCovenantobligatesthesellerofthelotscreatedto“expresslygrantandconvey”thelots“togetherwithand/orsubjectto”anynewprivateeasementsdelineatedontheshortplatintheconveyingdocument20.AddapurposestatementforeachoftheTracts(A&B).Inaddition,therewillneedtobeastatementregardingmaintenanceresponsibilitiesforallprivatelyheldinfrastructurewithintheseTracts.21.TherealsoneedstobesomelanguageregardingtheintendedownershipforeachTract.IftheLotsaretohaveaneachandundividedinterestintheTractssuchinterestneedstobeexpresslyconveyedintheconveyingdocumentastheshortplatisjustarecordofsurveyandnotaninstrumentofconveyance.22.DeedofDedication:IncludeafinalcauseintheExhibitAlegaldescription:AllsituateintheSoutheastquarterofSection4,Township23North,Range5East,W.M.,intheCityofRenton,KingCounty,Washington.Water:1.Theprojectproposestheextensionofabout8-inchwatermainwithintheproposedprivateroadoftheshortplat,extendingfromtheexistingwatermainonUnionAveNEuptothewestpropertylineoftheshortplat.Thewatermainmustbelocatedwithinthepavedaccessandmustbelocatedataminimumseparationof4feetfromthepavededge.2.SincetheproposedwatermainextensionwillcrosstheSeattlePublicUtility36”diameterwatermainciiUnionAveNE,theapplicantwillhavetocontacttheSeattlePublicUtilityregardingtheirclearancerequirements.3.Theprojectincludestheinstallationofafirehydrantnearthehammerheadoftheproposedprivateroad.AnadditionalfirehydrantisrequiredattheintersectionoftheproposedprivateroadwithUnionAveNE.4.Separatedomesticwatermeters,minimum1-inch,arerequiredtoserveeachsinglefamilylot.5.CivilplansforthewatermainextensionwillberequiredandmustbepreparedbyaregisteredprofessionalengineerintheStateofWashington.Minimumhorizontalclearancebetweenwaterandstormwaterlinesis10feet.Minimumverticalclearancebetweenwaterandstormwaterlinesis18inches.6.Subjecttowatersystemdevelopmentcharges,metersinstallationfeesandrelatedpermitfees.WaterSDCfee(2014rates)foror1-inchmeterinstallis$2,809.00.ThesefeesarecollectedatthetimeaconstructionpermitisissuedandtherateprevalentttimeofconstructionpermitwillbeSHPLReport14-000916 —CityofRentonDepartmentofCommunity&EconomicDevelopmentAdministrativeShortPiatReport&Decision2001UN!ONAVESHORTPMTLUA14000916,SHPL-AReportofSeptember12,2014Page19of20Iapplicable.Sewer:1.SewerserviceisprovidedbytheCityofRenton.Thereisan8-inchsewermaininUnionAveNE.Theproposedconceptualutilityplanincludesextendingthesewermain,withintheshortplat,totheIeasternboundaryofLotS.A10feetwidesanitarysewerpubliceasementi5proposedforthesewerservice.Additionally,a10feetwidepublicsewereasementisrequiredtobeprovidedthatwillextendtothewestpropertylineoftheshortplat.ACityofCityofRentonPublicUtilityeasementisrequiredovertheentireprivateroadandextendinguptothewestpropertylineoftheshortplat2.Systemdevelopmentfee(SDC)forsewerisbasedonthesizeofthenewdomesticwatertoserveIthehousesoneachlot.SewerSOCfee(2014rates)foror1-inchmeterinstallis$2,033.00.ThesefeesarecollectedatthetimeaconstructionpermitisissuedandtherateprevalentattimeofconstructionIpermitwillbeapplicable.SurfaceWater:1.AgeotechnicalreportpreparedbyGeoResourcesLLC,hasbeensubmittedfortheproject.Thereportmentionsthatlimitedinfiltrationofstormwaterisfeasibleintheon-sitesoils.EventhoughtheIgeotechreportrecommendsperviouspavementtobeconsideredfortheshareddriveway/privateroad,theCitydoesnotallowperviouspavementonprivatestreets!shareddriveway.I2.AdrainagereporthasbeensubmittedbyToumaEngineerswiththelanduseapplication.BasedontheCiWsflowcontrolmap,thissitefallswithintheFlowcontrolDurationStandardForestedsiteconditionsareaandthedrainagereportsubmittedwiththeutilityconstructionpermitmustrefertoitITheprojectproposesanopenpondtoservebothdetentionandwaterqualitytreatmentrequirements.Thesideslopes(interiorandexterior)ofthepondshallnotexceedthreefeetIIhodzontaltoonefootvertical,orverticalwallsarerequired.Landscapingisrequiredaroundthepond.Fenceisrequiredaroundthepond.SetbacksandeasementsregardingstormwaterfacilitiesshouldbeprovidedaspertheCityAmendments.ThedrainagereportshouldclearlyshowtheIinformationoftherequiredfrontageimprovementsandincludeitinthecalculations.ThereportmentionsthatthewaterqualitysystemswillbedesignedusingtheRentonamendmentofthe2009KingCountySurfaceWaterDesignManual.Thesubmitteddrainagereportincludesthe8coreIrequirements,butincludesonlySspecialrequirements.Thespecialrequirement#6regardingtheaquiferprotectionareashouldbeincludedinthedrainagereportsubmittedwiththeutilityconstructionpermit.ThesitefallsintheAquiferprotectionzone2area,thereforetheopenpondsIrequirealinerinaccordancewithdesigncriteriainsection6.2.4oftheCityAmendments,andopenconveyancesrequirealinerinaccordancewithSection1.2.4.3oftheCityAmendments.DrainageIplansandafinaldrainagereportbasedontheCityadopted2009surfaceWaterDesignManualAmendmentandthe2009KingCountySurfaceWaterDrainageisrequiredtobesubmittedwiththeConstructionpermit.ThedrainagereportsubmittedwiththeconstructionpermitmustincludeIdescribethedownstreamanalysisaswellastheevaluationoftheupstreamdrainagesystem.ThedrainagereportandplansmustincludeinformationoftheindividuallotstormwaterBMPs.Allstormwaterrequirementsasperthe2009SurfaceWaterDesignManualAmendmentandthe2009PKingCountySurfaceWaterDrainageManualisrequiredtobeprovidedbytheproject.3.AConstructionStormwaterGeneralPermitfromDepartmentofEcologyisrequiredsincetheSHPLReport14-000916 Cm,’ofRentonDepartmentofCommunity&EconomicDevelopmentAdministrativeShortPlotReport&Decision2001UNIONAVESHORTPMT1UA14-000916,SHPL-AReportofSeptember12,2014Page20of20gradingandclearingofthesiteexceedsoneacre.4.Surfacewatersystemdevelopment(SDC)feeis$1,228.00(2Q14rate)foreachlot.Transportation/Streets:1.UnionAvenueNEisaMinorArterialwithexistingrightofwaywidthof60feet.AsperTransportationsection,theexistingpavedwidthonUnionAveNEfrontageissufficient0.5feetwidecurb,8feetwidelandscapedplanter,8feetwidesidewalk,and1footwideclearspacebehindthesidewalkisrequiredtobeprovidedonthefrontagebythedeveloper.Theprojectrequiresthededicationof9.5feetofrightofway(subjecttofinalsurvey).2.Aprivatestreetwithminimum20feetpavedwidthand26feetwideaccesseasementwidthisproposedastheaccessfortheshortplat.Alllotsshouldgainaccessviatheprivateroad.NodirectaccessofthelotstoUnionAveNEisallowed.Theminimumseparationofaccessfromtheadjacentpropertylineis5feetTheaccessasshownintheplansshouldbemodifiedtoprovidethe5feetseparation.Theseparationdistancemustalsobelabeledintheplans.3.Allelectrical,phone,andcableservicesandlinesservingtheproposeddevelopmentmustbeunderground.TheconstructionofthesefranchiseutilitiesmustbeinspectedandapprovedbyaCityofRentoninspectorpriortorecordingtheplat4.TrafficImpactFees—Transportationimpactfeeisapplicableonsinglefamilyhousesbasedontheapplicablerateatthetimeofbuildingpermit,andpaymentisdueatthetimeofissuanceofthebuildingpermit.5.StreetlightingaspercurrentCitystandardsisapplicableontheUnionAveNEfrontage.1.Thefireimpactfeesareapplicableattherateof$479.28persinglefamilyunit.Thisfeeispaidpriortorecordingtheplat.Creditwillbegrantedfortheexistinghometoberemoved.2.Thefireflowrequirementforasinglefamilyhomeis1,000gpmminimumfordwellingsupto3,600squarefeet(includinggarageandbasements).Ifthedwellingexceeds3,600squarefeetaminimumof1,500gpmfireflowwouldberequired.Aminimumofonefirehydrantisrequiredwithin300-feetoftheproposedbuildingsandtwohydrantsifthefireflowgoesupto1,500gpm.Thereisoneexistingfirehydrantthatcanbecountedtowardtherequirement;itdoesnothavetherequiredstorzfittinghowever.Aminimumofonenewhydrantandawatermainextensionwillberequired.Itappearsthereisadequatefireflowinthisarea.3.Firedepartmentapparatusaccessroadwaysarerequiredtobeaminimumof20-feetwidefullypaved,with25feetinsideand45feetoutsideturningradius.Fireaccessroadwaysshallbeconstructedtosupporta30-tonvehiclewith322-psipointloading.Accessisrequiredwithin150feetofallpointsonthebuildings.Approvedapparatusturnaroundsarerequiredfordeadendroadsexceeding150feet.Hammerheadturnaroundsareallowedfordeadendstreetsupto300feetlong.Accessasproposedappearsadequate.SHPLReport14-000916 EXHIBIT2ONIONAVE.NX NE7thEXHIBIT34IirP10>rCP1U,0-D-I0z4zP1•0Cz-4CzC‘1-1nII—%rr0Ina,In0-lCz0LLLI2I-2&i_:—-‘a[:h!1igpp —EXHIBIT6CityofRentonTREERETENTIçWORKSHEET1.Totalnumberoftreesover6indiameter1onprojectsite:1.24trees2.Deduàtions:Certainfreesareexcludedfromtheretentioncalculation:Treesthataredead,diseasedordangerous21treesTreesinproposedpublicstreets___ _ _ ____treesTreesinproposedprivateaccesseasements/tracts17freesTreesincriticalareas3andbuffersfreesTotalnumberofexcludedfrees:2.1WtreeslO3.Subtractline2fromline1:3.6freesI4.Ne%todeterminethenumberoffreesthatmustberetainS,muftiplylineSby:0.3inzonesRC,R-1,R4,orR-8-0.1inallotherresidentialzones0.05inallcommercialandindustrialzones.4.1.8frees95.Listthenumberof5°orlargerfreesthatyouareproposing5toretain4:5.0frees6.Subtractline5fromline4forfreestobereplaced:6.1.8trees(IflineSislessthanzen,stophem.Noreplacementfreesarerequired).7.Multiplyline6by12”fornumberofrequiredreplacementinches:7.21inches8.Proposedsizeoffreestomeetadditionalplantingrequirement(Mhnwii?lipertreesrequire8.2inchesperfree9.Dividellne7bylineBfornumberofreplacementfrees5:(ifrematnderis5orgreater;rounduptothenextwholenumber)-9.10treesMeasuredatchestheight2.Dead,diseasedordangeroustreesmustbecertifiedassuchbyaforester,registeredlandscapeardiftect,orcertifiedarboristandapprovedbytheCity.‘CriticalAreas,suchaswetlands,sfreamà,floodplainsandprotectedslopes,aredefinedinSection4-3-050oftheRentonMuniäpalCode(RMC).CountonlythosefreestobereinedCuideofcriticalareasandbuffers.‘TheCitymayrequiremodificationofthetreeretentionplantoensureretentionofthemaximumnumberoftreesperRMC4,4-130F-WaLInchesofsfreetfrees,inchesoffreesaddedtoaificalareas/buffers,andinchesofbeetE4Rarelessthan6butaregreaterthan2”canbeusedtomeetthefreereplacementquiremt’JUL142GMC:\UsDau’.Doaimcnt\WordDoucieuteinvetitozywartsb\TreeReftutonWothheet9170034oc12/08ClivCFV:ENTONPLANNINGDIVISION •.•UEXHIBIT?;GeoRtPb253-896-10115007Fx253-896-2633--EntireDocumentAvailableUponRequestMaMr.KushalVarma2609NE5thCourtRenton,WA98056(206)353-3168GeotechnicalInfiltrationFeasibilityLetter2001UnionAveNERenton,WashingtonPN:0423059077JobNo.VannaJJnionAvNElRINTRODUCTION&SCOPEThisreportaddressesthefeasibilityofstormwaterinfiltrationfortheproposedresidentialshortplattobelocatedat2001UnionAvenueNEinRenton,Washington.Weunderstandthatyouproposetoconstructanewresidenceoneachofthenewlots.Wefurtherunderstandthataccesstothelotswillbeashareddrivewayalongthesouthportionofthesite.Wealsounderstandthatyouproposetoinfiltratethestormwaterfromtheproposedroofsoneachlot,wherefeasible.TheKingCountySurfaceWaterDesignManual(2009)requiressoillogstoconfirmsubsurfaceconditionsandtodeterminethefeasibilityofstorrnwaterinfiltrationatthesite.OnMay16,2014,wemonitoredtheexcavationoffivetestpitsacrossthesiteandloggedthesubsurfaceconditionsencountered.Soilsampleswerecollectedandarepresentativesampletestedforgrainsizedistribution.Thepurposeofourserviceswastoevaluatethesurfaceandsubsurfaceconditionsatthesiteasabasisfordevelopingandprovidinggeotechnicalstormwaterrecommendationsfortheproposeddevelopment.Specifically,ourscopeofservicesfartheprojectincludedthefollowing:1.Visitingthesiteandconductingageologicreconnaissancetoassessthesite’ssoil,groundwaterandslopeconditions;-2.Exploringthesubsurfaceconditionsacrossthesitebymonitoringtheexcavationoftestpits;3.Completinglaboratorygrainsizeanalysisforrepresentativesitesoils;and4.Providinginfiltrationratesforthestormwaterfacilities,asappropriate.SITECONDITIONSSurfaceConditionsThesiteissituatedinanareaofestablishedresidentialdevelopmentinRenton,Washington.Thesiteiscurrentlydevelopedwithanexistingsinglefamilyresidencewithabasementconfiguration.Thesiteisrectangularinshape,measuresapproximately330feetby135feetandencompasses1.02acres.Thegroundsurfaceonthesitegenerallyslopesfromtheeasttothewestatinclinationsoflessthan10percentTotaltopographicreliefonthesiteisontheorderof5verticalfeet.SiteSoilsandGeologicConditionsPErCTheUSDANaturalResourceConservationService(NRCS)WebSoilSuwe3KingCountymapsthesoilsintheareaofthesiteasAlderwoodgravellysandylp142014CYryQ:r!rojPLANNiNGDiVIso’j SECTION3OFF-SITEANALYSIS ProjectOverviewThisprojectinvolvesdevelopmentofa1.13acreparcelintofive(5)single-familyresidentiallots.Theexistingparcelhasanexistinghouse.Theremainingareaiscoveredwithseveralmaturetreeswithlawn.Thesitegenerallyslopesdowntonorthwestatapproximately2%to8%.PertheSCSSoilmaps,thesiteisunderlainwithAlderwood,gravellysandyloam,AgC.-Seeattachedgeotechnicalreport.DownstreamDrainageMajorityoftherunofffromtheexistingsitesheetflowssouthwestanddrainsthroughadjacentlotstoaprivatestormsystemlocatedatSheltonCTNE—CB’satpointAandBapproximately150-feetdownstreamfromtheprojectsite.ThisCB’sareconnectedthrough8-inchpipestoaprivatevaultlocatedatpointC.Runofffromthevaultoverflowsintothepublicstormsystem—aCBatpointDlocatedonthenorthsideoftheNE19tuiSt,foratotalof300-feetdownstreamfromtheprojectsite.Fromthereflowcontinueswestthrougha12-inchpipeandentersintoCB’satpointEandFforatotalof600-feetdownstreamfromtheprojectsite.Fromthereflowcontinueswestthroughand18-inchpipeandenterstoCB’satpoint01and0foratotalof750-feetdownstreamfromtheprojectsite.Fromthereflowcontinuessouththroughan18-inchpipeandcrossestheNE19thStandentersintoaCBlocatedatpointHonthesouthsideoftheNE9St.Fromthereflowcontinueswestthroughan18-inchpipeandenterstoaCBlocatedatpointIforatotalof800—feetdownstreamfromtheprojectsite.Fromthereflowcontinuessouththroughan18-inchpipealongtheeastsideoftheRedmondP1NEandentersintoCBatpointJforatotalof900—feetdownstreamfromtheprojectsite.FormthereflowdischargesthroughapipeintoaheavyvegetatedchannelatpointK.Formthereduetoheavyvegetationandsteepslopedownstreamanalysiswasnotpossible,butbyjudgingfromcontours,thechannelcontinuesnaturaltopographyasitisshowninthedrainagemap,andeventuallyentersintoHoneyCreek.ThehoneyCreekcontinuesnorthwest,andjoinstoMayCreek.Averysmallportionoftherunoffontheeastsideoftheparcelsheetflowssoutheastandinfiltratesinfrontyardofexitinghouse.TherewerenoobviousdownstreamdrainageproblemshavebeenidentifiedduringthisLevel1Downstreamanalysis.Pleaserefertotheendofthissectionfordownstreamdrainagemapandphotos. Photo1:ExistingparcelsheetflowsouthwestPhoto2:CBatpointAPhoto3:HeavyvegetatedchannelatpointK Mcikjjr——::helnIonnauootodedtednpS.beenellØedb7N4eIranalsngeWCountymakesnortpfesantadcosa?raflet,aepewa•a.c,cj,tpleW.t.flt,eitilatheuseofsuchThtsdocumentisnotIntendedForuseasaauneyprcá.kind’ounty.11.11notbelieS.ftry-ed&.k.dtrect.lnddentalornsequentetdsmsqesincluding,butnotlimitedto,lostrevenuesortoilprofit,resultingfromtheuseorrs*a.W•nfontatlintslnedonthismap.MysaleofthismaporinfonnetononthismapIsprohibitedexceptbywrittenpenmsslonotKingCountytieiqhrsámR4L440_p./ii41N€215tSTItIt46itnIsrit.—Lt.———————4l5-/1_f—I’llN(tiNIIdfeLItJS’cnqCouMyUKingCountyDate:lfUf2U15Source:KingCountyMAP-PropertyInformation(http:llvwnvmetmkgovlOI8JIUaP) SECTION4FLOWCONTROLANDWATERQUALITYFACILITYANALYSISANDDESIGN v—-sQ‘zz-LUu-00>a0)-liia—0-3UiDX00-J-JUi-CI000uItJVI--I-&tUiICIr3l-fl-tkI,VI——;%—-k——ElEZEfZEEZZ±flc_EEzE1E————-C—.-——-——-—-—----—-—---—:;Etzr[i:z:————_—-EEq:aatcsj)I“-—r00-I$I—<<H--4---1----------i—Iit*ct--t0’irL—-_-ZIriccdus©04‘.S—1-tak‘ne9:wgjI4jtt°Ub—3n.ii.t0GI’flOriCJI—aa——a———aaaaaaa——-1— 3 •1 .- -- — I, L :3t,b 3 C ci —“-OO- -ill —or cix E gJ ø. -III,•7-Th+?4.tç3 vniRFYb-o -t ,-i,4’1+zE ‘-F ‘iIl ‘t j t --E_— %sltr it,r1--—7’-——---—— rca-t T1 ----—--—— ,r P % -— —__I I-t li — EEEEELZZEEEEEEEEZE L ——————————————————__H_I EE_ELt _1E_EEh4_*J_LL1LhiJ F i1i I [ cc l.a.——-—.‘w ::u.c C ‘Cl) C CIJ— I_i_i_ a. •TI EEL gZEL. EEHETZEEEEEPHEE H ec %ç t:Er F - a. I zE_:_E1zE_’_EEEDiDLE ———‘—-Lr—1o - ::E:z::z::E:z::EE: In 0 0 In0I>I 0>rfl r Cl,U’r 0 0InCflC 2a-U’fl --C U U’-C C —It- ‘-‘3 -t —? o a 0 In In I I IIIII ——————————Cl ————L_J L_J Z_J lit--r r — 1!’7’‘ii I,’ V.) p In 1’ n I—r1-r --:1 - ‘I’ ‘I’Ti ‘p 1\ in rr in ——-v -c o LM£t C.zCtCt 0‘C 0 _ 0’ ,— (21 0 IJoo (!lJ iJo•• I - ‘a) 5N 3 -n “S 013 -L 0 ‘4 S.) Cc0’ C i) IL ci-’ r I 0” ‘.1 ‘S )0r 1 &r r V I 1 V N I.’. V 3 It, U U’ I’ 0 -ø w -L ‘Pr E ‘E.grnt0o, ii —B .(S -7,00a- —Cs CtCtrnctZ. 0 -R” CM >0 0 S0 Ct ‘0 ‘ j CC 1 P U n t ‘1 0I0 10 Ci,0 00I>>m rr000CmCU-.C m-C U C-C §-n C --U -B VI r%J (\ 2 z 2 at “-11 ‘U, ii —Ii -c a C ti.11 -pot U 0 6:,’ ‘l C•11 F” LU0LU0U04-!’toI1-I—I————-L±>.0>UiIIF3LUZCLU00-JJLU-<<I000Cfl‘L’)_..—o3..j’__!-*L-4\)a%UCALijgN;Jbii:4.çirt.1—,.kIrIN‘24o-a‘j.%?sntttU-tVPCLNSc-i0%Ce0’IEnd.-CL0tUiiaJ.00‘IC0—CO00ZECEoLaW—a1—LV—1——1s<\!—bLtt1:H*F1LLQTH-r‘‘—°kLUfl\(EuRi\--I--i---t:.tt-L_-It4r74L4---‘--1-r:-EH--II-Li._-it0i_U--‘F’______-L--it-it-I——.1-N——i—------.__-.‘ST‘r*jilLflII’an-‘4il—‘-ztIJIl•-.%SI‘.—t—tZ’tsfl4—%-tt:.rI.-IsS--I-r-t.c-J1-—-NC00aa<tn—r—4—r0•00—ICLLe2E’-.enc0en0trNt—CL..4S00‘C0o0NInC—.oCizCo0.0.‘C.C—a—4---i----4-i----I—-—-h——_-i—--—±zLz*LH4-4Iaaaa—a—a———aaaaa al.vu3-wad0TUbA9O3lD3HDASaawinoivaONJSEHSZLELZJELE•1•1.,jtzzri1•zt*HH**Z’REi:*LJjfLrL.:ELi*LzEER*11L----mlllt7z:J.J___L___L:L.J*Iifiiztz:ZZ9Zz__Qerf#fkLLThTJJ:zII41,IIir%nrr2wz:ZEIZ1ELEJr-Hi7tr@flE7tfl*3fl’Ø-————‘EZZZZd!NZi&1W’}’4MboV4’zzzII{‘:1.:TfTzfTrEz:zzzzzT-tzibHzzzzJ+HHuiI?IIII‘IrI IS9OE-16E(sEP)xviOSO-6E(set)£18E-a086NOIONIHSVM‘HVflOVSSI4}flOS3ao;4U0JJ0013N1‘OHJSW1OH‘VWiVSuI ThWWHM2O12I-IPROJECTREPORT4!-i GeneralModelInformationProjectName:Pond4SiteName:2001UnionSiteAddress:City:ReportDate:4/17/2015Gage:SeatacDataStart:1948/10/01DataEnd:2009/09/30Timestep:15MinutePrecipScale:1.17Version:2013/11/20POCThresholdsLowFlowThresholdforPOC1:50Percentofthe2YearHighFlowThresholdforPOCI:50YearPond44/17/20154:07:16PMPage2 LanduseBasinDataPredevelopedLandUseBasin1Bypass:NoGroundWater:NoPeMousLandUseAcresC,Forest,Flat1.13PerviousTotal1.13ImperviousLandUseAcresImperviousTotal0BasinTotal1.13ElementFlowsTo:SurfaceInterfiowGroundwaterPond44/17/20154:07:16PMPage3 MitigatedLandUseBasin1Bypass:NoGroundWater:NoPerviousLandUseAcresC,Lawn,Flat0.44PerviousTotal0.44ImperviousLandUseAcresROADSFLAT0.32DRIVEWAYSFLAT023POND0.14ImperviousTotal0.69BasinTotal1.13ElementFlowsTo:SurfaceInterfiowGroundwaterTrapezoidalPond1TrapezoidalPond1Pond44/17/20154:07:16PMPage4 RoutingElementsPredevelopedRoutingPond44/17/20154:07:16PMPage5 MitigatedRoutingTrapezoidalPondBottomLength:BottomWidth:Depth:Volumeatriserhead:Sideslope1:Sideslope2:Sideslope3:Sideslope4:DischargeStructureRiserHeight:RiserDiameter:Orifice1Diameter:Orifice2Diameter:Orifice3Diameter:ElementFlowsTo:Outlet159.70ft.59.70ft.5ft.0.4040acre-ft.1.5ToI1.5To11.5To11.5To14ft.18in.flo&.1-ii%1ZcVcioç’tPondHydraulicTable10.75in.124in.0.74in.Outlet2Elevation:0ft.Elevation;2.668ft.Elevation:3ft.IStage(ft)Area(ac)Volume(ac-ft)Discharge(cfs)lnfilt(cfs)0.00000.0810.0000.0000.0000.05560.0820.0040.0030.0000.11110.0820.0090.0040.000P0.16670.0830.0130.0060.0000.22220.0830.0180.0070.0000.27780.0840.0230.0070.000I0.33330.0840.0270.0080.0000.38890.0850.0320.0090.0000.44440.0850.0370.0090.0000.50000.0860.0410.0100.000I0.55560.0860.0460.0110.0000.61110.0860.0510.0110.0000.66670.0870.0560.0120.000P0.72220.0870.0610.0120.0000.77780.0880.0660.0130.0000.83330.0880.0710.0130.0000.88890.0890.0760.0130.000I0.94440.0890.0610.0140.0001.00000.0900.0860.0140.0001.05560.0900.0910.0150.000r1.11110.0910.0960.0150.000fl1.16670.0910.1010.0160.000-1.22220.0920.1060.0160.0001.27760.0920.1110.0160.000J1.33330.0930.1160.0170.000J1.38690.0930.1210.0170.0001.44440.0940.1270.0170.000I1.50000.0940.1320.0180.0001.55560.0950.1370.0180.0001.61110.0950.1420.0180.0001.66670.0960.1480.0190.000I1.72220.0960.1530.0190.0001.77780.0970.1580.0190.000Pond44/17/20154:07:16PMPage6 1.83330.0970.1640.0200.0001.88890.0980.1690.0200.0001.94440.0980.1750.0200.0002.00000.0990.1800.0200.0002.05560.0990.1860.0210.0002.11110.1000.1910.0210.0002.16670.1000.1970.0210.0002.22220.1010.2020.0220.0002.27780.1010.2080.0220.0002.33330.1020.2140.0220.0002.38890.1020.2190.0220.0002.44440.1030.2250.0230.0002.50000.1030.2310.0230.0002.55560.1040.2370.0230.0002.61110.1040.2420.0230.0002.66670.1050.2480.0240.0002.72220.1050.2540.0330.0002.77780.1060.2600.0380.0002.83330.1060.2660.0410.0002.88890.1070.2720.0440.0002.94440.1070.2780.0460.0003.00000.1080.2840.0480.0003.05560.1080.2900.0540.0003.11110.1090.2960.0570.0003.16670.1090.3020.0600.0003.22220.1100.3080.0630.0003.27780.1110.3140.0650.0003.33330.1110.3210.0680.0003.38890.1120.3270.0700.0003.44440.1120.3330.0720.0003.50000.1130.3390.0740.0003.55560.1130.3460.0760.0003.61110.1140.3520.0780.0003.66670.1140.3580.0600.0003.72220.1150.3650.0820.0003.77780.1150.3710.0830.0003.83330.1160.3770.0850.0003.88890.1160.3840.0870.0003.94440.1170.3900.0880.0004.00000.1180.3970.0900.0004.05560.1180.4040.2830.0004.11110.1190.4100.6340.0004.16670.1190.4171.0890.0004.22220.1200.4231.6260.0004.27780.1200.4302.2360.0004.33330.1210.4372.9100.0004.38890.1210.4443.6430.0004.44440.1220.4504.4300.0004.50000.1230.4575.2680.0004.55560.1230.4646.1540.0004.61110.1240.4717.0850.0004.66670.1240.4788.0590.0004.72220.1250.4859.0750.0004.77780.1250.49210.130.0004.83330.1260.49911.220.0004.88890.1270.50612.350.0004.94440.1270.51313.520.0005.00000.1280.52014.720.000Pond44/17120154:07:16PMPage7 5.05560.1280.52715.950.000Pond44/17/20154:07:16PMPageS AnalysisResultsPod-_ICE]1002ftt-I1IIIJ3PredevelopedLanduseTotalPerviousArea:TotalImperviousArea:TotalsforPOC#11.130MitigatedLanduseTotalsforPOC#1TotalPerviousArea:0.44TotalImperviousArea:0.69FlowFrequencyMethod:LogPearsonTypeIII178FlowFrequencyReturnPeriod2year5year10year25year50year100yearReturnPeriodsforPredeveloped.POC#1Flow(cfs)0.0441440.0727790.0945160.1248930.1495290.175815FlowFrequencyReturnPeriodsforMitigated.POC#1ReturnPeriodFlow(cfs)2year0.027189PeaksforPredevelopedandMitigated.POC#1PredevelopedMitigated0.0540.0190.0630.0230.0910.0760.0300.0170.0260.0210.0370.0220.0570.0210.0470.0370.0420.0220.0430.023U0J{LIDlI;012————•—-———_______________________________,]t::__00110E4e.,..Th..Dl+PredevelopedxMitigatedDIIIIIIILCSSISISI•IlI5year10year25year50year100yearAnnualPeaks0.0443640.0594950.0837960.1063010.133168AnnualYear1949195019511952195319541955195619571958Pond44/17/20154:07:16PMPage9 I19590.0360.01919600.0700.06719610.0350.024I19620.0240.01719630.0340.02219640.043-0.02219650.0320.037I19660.0290.02119670.0670.02319680.0390.021I19690.0380.02019700.0320.02119710.0400.02219720.0690.060I19730.0330.03619740.0370.02219750.0530.021I19760.0370.02219770.0130.01819780.0310.02319790.0200.016P19800.0990.06619810.0290.02119820.0690.053P19830.0470.02219840.0300.01819850.0170.02019860.0740.031P19870.0680.05919880.0290.01919890.0180.019-,19900.1890.07019910.0850.062II19920.0360.02319930.0340.018I19940.0140.01619950.0460.02319960.1080.07619970.0850.071I19980.0300.01919990.1180.05920000.0330.023I20010.0090.01620020.0460.04020030.0630.02120040.0730.07820050.0480.02220060.0500.03320070.1400.140I20080.1490.07920090.0670.039RankedAnnualPeaksRankedAnnualPeaksforPredevelopedandMitigated.POC#1RankPredevelopedMitigated10.18910.140020.14860.078630.13980.0779Pond44/17/20154:08:07PMPage10 El40.11780.0757U50.10780.075660.09880.0707P70.09080.070480.08520.066790.08510.0657100.07380.0624P110.07280.0602120.07050.0592130.06930.0588—140.06860.0525j150.06780.0403160.06710.0389170.06690.03741180.06310.0365190.06280.0357200.05730.0331-,210.05400.0310220.05260.0236230.04960.0234240.04790.02341250.04710.0233J260.04670.0233270.04590.0230I280.04580.0226290.04320.0226300.04280.0225310.04220.0225I320.04020.0223330.03920.0223340.03790.0220I350.03740.0218360.03710.0218370.03690.0215380.03630.0215I390.03560.0213400.03520.0212410.03450.0211I420.03440.0211430.03290.0208440.03270.0207450.03220.02061460.03180.0205J470.03140.0199480.03040.01951490.03030.0192500.02980.0190J510.02920.0190520.02880.0189530.02860.0187j540.02560.0183550.02390.01821560.01960.0181570.01820.0171580.01740.0169590.01400.0164I600.01290.0161610.00860.0155Pond44/17/20154:08:07PMPage11 Pond44/17/20154:08:07PMPage12 DurationFlowsTheFacilityPASSEDFIow(cfs)PredevMitPercentagePasslFail0.0221184481455378Pass0.023416101829751PassI0.024614324473333Pass0.025912694453235Pass0.027211178435038PassI0.02859890413441Pass0.02988819399545Pass0.03117837381848Pass0.03247005370752PassI0.03376293360457Pass0.03495679343160Pass0.03625170323062PassI0.03754697306365Pass0.03884278290067Pass0.04013906272569Pass0.04143527255872PassI0.04273183237474Pass0.04402864221477Pass0.04522592203778PassI0.04652353190280Pass0.04782137174281Pass0.04911952157980Pass0.05041796151884PassI0.05171669145286Pass0.05301514137991Pass0.05431343131697PassI0.05551223122199Pass0.056811231137101Pass0.05811042103399Pass0.059497093396Pass!0.060791084793Pass0.062083877892Pass0.063376669690PassI0.064670462688Pass0.065863356188Pass0.067157049386Pass0.068448844290PassI0.069742539893Pass0.071037633589Pass0.072334130489PassI0.073630726084Pass0.074927121378Pass0.076123516670Pass0.077419613669PassI0.078717110561Pass0.08001459464Pass0.08131258467PassI0.08261077166Pass0.0839956366Pass0.0852845565Pass0.0864714867Pass0.0877614065Passj0.0890553258PassPond44/17120154:08:07PMPage13 0.0903451635Pass0.0916401230Pass0.0929371232Pass0.0942351234Pass0.0955291137Pass0.0967251144Pass0.0980221150Pass0.0993171164Pass0.1006151066Pass0.101911872Pass0.10329888Pass0.104588100Pass0.10588675Pass0.10708562Pass0.10837571Pass0.10967571Pass0.11097571Pass0.11227571Pass0.11357571Pass0.11487571Pass0.11617571Pass0.11736583Pass0.11865480Pass0.11995480Pass0.12125480Pass0.122544100Pass0.12384375Pass0.12514375Pass0.12644375Pass0.12764375Pass0.12894375Pass0.13024375Pass0.13154375Pass0.13284250Pass0.13414250Pass0.13543266Pass0.13673266Pass0.13793266Pass0.13923266Pass0.1405200Pass0.1418200Pass0.1431200Pass0.1444200Pass0.1457200Pass0.1470200Pass0.1482200Pass0.1495100PassPond44/17/20154:08:07PMPage14 WaterQualityWaterQualityBMPFlowandVolumeforPOC#1On-linefacilityvolume:0.04acre4eetOn-linefacilitytargetflow:0.0202cfs.Adjustedfor15mm:0.0202cfs.Off-linefacilitytargetflow:0.0134cfs.Adjustedfor15mm:0.0134cfs.Pond44/17/20154:08:07PMPage15 LIDReportUotediniqueUsedrorTreaknent’PercentWaterQuatilyVolumemolbaledTotalVolumeVolumeki%lbalonQimulatiwNeedsTwougiVolumeVolumeTmaftnentFadly(ac4)hillbaWon(ac-if)(ac4)PercentcommentWaleiQuaMyTreedTnidPoqdIPOC‘.-a.:..,,.0.00Totaln,efllbad%rzJL0000.41CeniØaic.LE--..)b-gtadnwaflsojr‘-.--‘-‘:-S;-—x4i.1E’---:--&..--tPond44/17/20154:08:07PMPage16 ModelDefaultModificationsTotalof0changeshavebeenmade.PERLNDChangesNoPERLNDchangeshavebeenmade.IMPLNDChangesNoIMPLNDchangeshavebeenmade.Pond44/17/20154:08:41PMPage17 AppendixPredevelopedSchematicPand44/17/20154:08:41PMPage18 MitigatedSchematicPond44/17/20154:08:42PMPage19 PredevelopedUCIFileRUNGLOBALWWMM4modelsimulationSTART19481001END20090930RUNINTERPOUTPUTLEVEL30RESUT4E0RUN1UNITSYSTEMENDGLOBALFILES<File><Un#>FileName>***<-ID—>WDM26Pond4.wdmMESSU25PrePond4.r4ES27PrePond4.L6128PrePond4.L6230POCPond41.datENDFILESOPNSEQUENCEINGRPINDELT00:15PERLND10COPY501DISPLY1ENDINGRPENDOPNSEQUENCEDISPLYDISPLY-INFO1-4$Title>***TpJfPIVLDIG1FILlPYRDIG2FIL2YRND1Basin112309ENDDISPLY-INFO1ENDDISPLYCOPYTIMESERIES4$-4$NPTNMN11150111ENDTIMESERIESENDCOPYGENEROPCODE44OPCD***ENDOPCODEPAR!.!4$4$ENDPARMENDGENERPERLNDGEM-INFO<PLS>Name>NBLKSUnit-systemsPrinter***4$-4Usert-seriesEnglMetr“inout10C,Forest,Flat1111270ENDGEM-INFOSectionPWATER***ACTIVITY<PLS>*************ActiveSections4$-4ATMPSNOWPWATSEDPSTPWGPQALMSTLPESTNITRPHOSThAC10001000000000ENDACTIVITYPRINT-INFO<PLS>*“***““*****Print—flags““““P1W,PYR4-4$ATMPSNOWPWATSEDPSTPWGPQALMSTLPESTNITRPHOSTRAC1000400000000019ENDPRINT-INFOPond44/17/20154:08:42PMPage20 PWAT-PARM1<PLS>PWATERvariablemonthlyparametervalueflags-*CSNORTOPUZFGVCSWJZVNNVIFWVIRCVLEINFCHWT1000000000000ENDPWAT-PARM1PWAT-PARN2cPLSPWATERinputinfo:Part2*-#***Q5’’LZSNINFILTLStJRSLSURKVARYAGWRC1004.50.084000.050.50.996ENDPWAT-PARM2PWAT-PARM3<PLS>PWATERinputinfo:Part34-4***p’fl4pJ(PETMININFEXPINFILDDEEPFRBASETPAGWETP100022000ENDPWAT-PARM3PWAT-PARM4<PLSPWATERinputinfo:Part4ft-4CEPSCUZSNNSURINTFWIRCLZETP100.20.50.3560.50.7ENDPWAT-PARM4PWAT-STATE1<PLS>Initialconditionsatstartofsimulationranfrom1990toendof1992(pat1-11-95)RtJN21***ft-ftCEPSSURSUZSIFWSLZSAGWSGWVS1000002.510ENDPWAT-STATE1ENDPERLNDIMPLNDGEN-INFO<PLS>Name>Unit-systemsPrinter****-ftUsert-seriesEnglMetrinoutENDGEN-INFO***SectionIWATER***ACTIVITY<PLS>*************ActiveSections*-4ATMPSNOWIWATSLDIWGIQALENDACTIVITYPRINT-INFO<ILS>Print-flagsPIVLPYR*-*ATMPSNOWIWATSLDIWGIQALENDPRINT-INFOIWAT-PARM1<PLS>IWATERvariablemonthlyparametervalueflags****-4CSNORTOPVRSVNNRTLIENDIWAT-PARM1IWAT-PARM2cPLS>IWATERinputinfo:Part2ft-*LSURSLSURNSURRETSCENDIWAT-PARM2IWAT-PARM3<PLS>IWATERinputinfo:Part3*-4***pfl4J1j(PETMINENDIWAT-PARM3IWAT-STATE1<PLS>‘“Initialconditionsatstartofsimulation4-ftPETSSURSENDIWAT-STATE1Pond44/17/20154:08:42PMPage21 ENDIMPLNDSCHEMATIC<-Source-><--Area--><-Target->KBLK•<Name>if<-factor-><Name>ifTbl#**Basin1***PERLND101.13COPY50112PERLND101.13COPY50113******Routing******ENDSCHEMATICNETWORK<-Volume-><-Grp><-Member-z.<--Mult-->Tran<-Targetvols><-Grp><-Member-><Name>if<Name>if#<-factor->strg<Name>ifif<Name>*ifCOPY501OUTPUTMEAN1148.4DISPLY1INPUTTIMSER1<-Volume-><-Grp><-Meniber-><--Mult-->Tran<-Targetvols><-Grp><-Member-><Name>if<Name>ifif<-factor->strg<Name>ifif<Name>ififENDNETWORKRCIiRESGEN-INFORCHRESNameNexitsUnitSystemsPrinterif-if><--->UserT-seriesEngiMetrLKFGinoutENDGEN-INFOSectionRCHRES***ACTIVITY<PLS>ActiveSectionsif-ifHYFGADFGCNFGHTFGSDFGGQFGOXFGMJFGPKFGPHFGENDACTIVZTYPRINT-INFO<PLS>*****************Print—flagsPIVLPYRif-#HYDR?LCACONSHEATSEDGQLOXRXNUTRPLNKPHCBPIVLPYRENDPRINT-INFOHYDR-PARM1RCHRESFlagsforeachHYDRSectionif-ifVCAlA2A3ODFVFGforeach***ODGTFGforeachFUNCTforeachFGFGPGFGpossibleexitpossibleexitpossibleexit**************ENDHYDR-PARM1HYDR-PARM2if-ifFTABNOLENDELTHSTCORKSDBSO>>>>>>>ENDHYDR-PARN2HYDR-INITRCHRESInitialconditionsforeachHYDRsectionif-if**VOLInitialvalueofCOLINDInitialvalueofOUTDGTac-ftforeachpossibleexitforeachpossibleexit>><---><---><—--><-——><--—>***ENDHYDR-INITENDRCHRESSPEC-ACTIONSENDSPEC-ACTIONSFTABLESENDFTABLESEXTSOURCES<-Volume-><Member>SsysSgap<--Mult-->Tran<-Targetvols><-Grp><-Member-><Name>if<Name>ifternstrg.c-factor->strg<Name>44<Name>4WDM2PRECENGL1.167PERLND1999EXTNLPRECWDM2PRECENGL1.167IMPLND1999EXTNLPRECPond44/17/20154:08:42PMPage22 WDM1EVAP£NGL0.16PERLND1999EXTNLPETINPWOM1EVAPENGL0.76IMPLND1999EXTNLPETINPENDEXTSOURCESEXTTARGETS<-Volume-,<-Grr,><-Member-,<--Mult--,Tran<-Volume-><Member>TsysTgapAnd“<Name>4<Name>4#<-factor-’strg<Name>4<Name>ternstrgstrg***COPY501OUTPUTMEAN1148.4WDM501FLOWENGLREPLENDEXTTARGETSMASS-LINK<Volume><-Gr,c-Menther-><--Mult--><Target><-Grp><_Member_>***<Name><Name>4$1k-factor-><Name><Name>4$MASS-LINK12PERLNDPWATERSURO0.083333COPYINPUTMEANENDMASS-LINK12MASS-LINK13PERLNDPWATERIFWO0.083333COPYINPUTMEANENDMASS-LINK13ENDMASS-LINKENDRUNPond44/17/20154:08:42PMPage23 MitigatedUCIFileRUNGLOBALWNHM4modelsimulationSTART19481001END20090930RUNINTERPOUTPUTLEVEL30RESUb4E0RUN1UNITSYSTEMENDGLOBALFILES<File>cUn#>FileName>***c-ID->WDM26Pond4.wdmMESSU25MitPond4.MES27MitPond4.L6128Mitpond4.L6230POCPond4l.datENDFILESOPNSEQUENCEINGRPINDELT00:15PERLND16IMPLND1IMPLND5It4PLND14RCHRES1COPY1COPY501DISPLY1ENDINGRPENDOPNSEQUENCEDISPLYDISPLY-INFO1-Title,***‘‘pjPIVLDIG1FILlFIRDIG2FIL2YRND1TrapezoidalPond1MAX12309ENDDISPLY-INFO1ENDDISPLYCOPYTIMESERIES#-#NPTNMN***11150111ENDTIMESERIESENDCOPYGENEROPCODE#4OPCDENDOPCODEPARMKENDPARMENDGENERPERLNDGEN-INFOcPLS>Name>NELKSUnit-systemsPrintert**4$-4Usert-seriesEnylMetrinout16C,Lawn,Flat1111270ENDGEN-INFO“SectionPWATERt**ACTIVITYc?LS>*************ActiveSections**w*****************w*****te*4-4ATM?SNOWPWATSEDPSTPWGPQALMSTLPESTN1TRPHOSTRAC“16001000000000ENDACTIVITYPRINT-INFOPond44/17/20154:08:42PMPage24 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1.7777780.0970900.1588360.0196981.8333330.0975880.1642440.0200031.8888890.0980880.1696790.0203041.9444440.0985890.1751430.0206012.0000000.0990910.1806340.0208932.0555560.0995940.1861530.0211812.1111110.1000990.1917000.0214652.1666670.1006050.1972750.0217462.2222220.1011120.2028780.0220232.2777780.1016200.2085100.0222972.3333330.1021300.2141690.0225672.3888890.1026410.2198570.0228342.4444440.1031540.2255740.0230982.5000000.1036670.2313190.0233592.5555560.1041820.2370930.0236172.6111110.1046980.2428950.0238722.6666670.1052160.2487260.0241252.7222220.1057340.2545850.0337782.7777780.1062540.2604740.0380032.8333330.1067750.2663910.0412882.8888890.1072980.2723380.0440902.9444440.1078220.2783130.0465833.0000000.1083470.2843180.0488573.0555560.1088730.2903520.0543543.1111110.1094010.2964150.0577343.1666670.1099300.3025080.0606783.2222220.1104600.3086300.0633633.2777780.1109910.3147810.0658613.3333330.1115240.3209620.0682163.3888890.1120580.3271730.0704533.4444440.1125930.3334130.0725913.5000000.1131300.3396830.0746443.5555560.1136680.3459830.0766223.6111110.1142070.3523130.0785353.6666670.1147470.3586730.0803883.7222220.1152890.3650630.0821893.7777780.1158320.3714830.0839403.8333330.1163760.3779330.0856483.8888890.1169210.3844130.0873143.9444440.1174680.3909240.0889434.0000000.1180160.3974650.0905364.0555560.1185650.4040370.2833894.1111110.1191160.4106390.6346824.1666670.1196680.4172721.0891104.2222220.1202210.4239361.6269384.2777780.1207750.4306302.2367604.3333330.1213310.4373552.9108814.3888890.1218880.4441113.6436534.1444410.1224460.4508984.4306994.5000000.1230060.4577175.2684984.5555560.1235670.4645666.1541374.6111110.1241290.4714467.0851544.6666670.1246920.4783588.0594334.7222220.1252570.4853019.0751294.7777780.1258220.49227510.130614.8333330.1263900.49928111.224444.8888890.1269580.50631912.355304.9444440.1275280.51338813.522035.0000000.1280990.52048814.72354ENDFTABLE1ENDFTABLESEXTSOURCES<-Volume-><Member>SsysSgap<--Mult-->Tran<-Targetvols><-Grp><-Member-><Name>#<Name’#ternstrg<-factor->strg<Name>#4*<Name’*4*WEM2PRECENGL1.167PEELNO1999EXTNLPRECWDM2PRECENGL1.167IMPLND1999EXTNLPRECWDM1EVAPENOL0.76PERLND1999EXTNLPETINPWDM1EVAPENGL0.76IMPLND1999EXTNLPETINPPond44/17/20154:08:42PMPage26 ENDEXTSOURCESEXTTARGETSc-volume-><-Grp><-Member->c--Mult-->Tran<-Volume-><Member>TsysTgapArid***<Name>4<Name>4#<-factor->strg<Name>4<Name>ternstrgstrg***RCHRE51HYDRRO111WDM1000FLOWENGLREPLRCHRES1HYORSTAGE111WON1001STAGENGLREPLCOPY1OtJTPTTfMEAN1148.4WON701FLOWENGLREPLCOPY501OUTPUTMEAN1148.4WON801FLOWENGLREPLENDEXTTARGETSMASS-LINK<Volume><-Gr><-Mernber-><--Mult--><Target><-Grp><_Member_>***<Name><Name>44<-factor-><Name><Name>4MASS-LINK2PERLNDPWATERSURO0.083333RCHRESINFLOWIVOLENDMASS-LINK2MASS-LINK3PERLNDPWATERIFWO0.083333RCHRESINFLOWIVOLENDMASS-LINK3MASS-LINK5IMPLNDIWATERSURO0.083333RCHRESINFLOWIVOLENDMASS-LINK5MASS-LINK12PERLNDPWATERSURO0.083333COPYINPUTMEANENDMASS-LINK12MASS-LINK13PERLNDPWATERIFWO0.083333COPYINPUTMEANENDMASS-LINK13MASS-LINK15IMPLNDIWATERSURO0.083333COPYINPUTMEANENDMASS-LINK15MASS-LINK16RCHRESROFLOWCOPYINPUTMEANENDMASS-LINK16ENDMASS-LINKENDRUNPand44/17120154:08:42PMPage29 PredevelopedHSPFMessageFilePond44/17/20154:08:42PMPage30 MitigatedHSPFMessageFilePond44/17/20154:08:42PMPage31 DisclaimerLegalNoticeThisprogramandaccompanyingdocumentationareprovided‘as-is’withoutwarrantyofanykind.TheentireriskregardingtheperformanceandresultsofthisprogramisassumedbyEndUser.ClearCreekSolutionsInc.andthegovernmentallicenseeorsublicenseesdisclaimallwarranties,eitherexpressedorimplied,includingbutnotlimitedtoimpliedwarrantiesofprogramandaccompanyingdocumentation.InnoeventshallClearCreekSolutionsInc.beliableforanydamageswhatsoever(includingwithoutlimitationtodamagesforlossofbusinessprofits,lossofbusinessinformation,businessinterruption,andthelike)arisingoutoftheuseof,orinabilitytousethisprogramevenifClearCreekSolutionsInc.ortheirauthorizedrepresentativeshavebeenadvisedofthepossibilityofsuchdamages.SoftwareCopyhght©by:ClearCreekSolutions,Inc.2005-2013;AllRightsReserved.ClearCreekSolutions,Inc.6200CapitolBlvd.SteFOlympia,WA.98501TollFree1(866)943-0304Local(360)943-0304www.clearcreeksolutions.comPond44/17/20154:08:42PMPage32 SECTION5CONVEYANCESYSTEMANALYSISAM)DESIGN EncompassEngineering&SurveyingEasternWashingtonDivision407SwiftwacerBlvd.,CeElum,WA98922Phone(509)674-7433Fax(509)674-7419WesternWashingtonDivision165NEJuniperSt.,Suite201,lssaquah,WA98027Phone(425)382-0250Fax(425)391-3055JoeSHEETNO.OF_CA LCULA TED BY___ __ _ __ __ _ __ __ _ __ __ _ __ _DATECHECKEDBYDATESCALEFfl-En-tE__I_I_---1-L)sWfl4d1gz1+Afr’4!4Th____—V4EvcR’sofl-LoioagçcjZvf3oFFf2-.AZ=o.ptc-—1——:iz:::tnttz-t---—-1---p—nz:itII(aap:‘Lt-M’a,i;Re9c9-•fr[tEEEEzjZ*tEEic&4.V4&R-uTVtEu’-’5Lo)Ci-y-i%h:YirLTL&t-10.teE__REII.NOC KCRTSPeakFlows1w15minutetimestepsFlowFrequencyAnalysisTimeSeriesFile:l5min.tsfProjectLocation:Sea—Tac-——AnnualPeakFlowRates———FlowFrequencyAnalysisFlowRateRankTimeofPeak——peaks——RankReturnProb(CFS)(CE’S)Period0.32968/27/0118:001.031100.000.990100—yr0.23681/05/0215:000.718225.000.9600.718212/08/0217:150.460310.000.9000.26578/23/0414:300.41945.000.8000.419411/17/045:000.39653.000.6670.396510/27/0510:450.32962.000.5000.460310/25/0622:450.26571.300.2311.0311/09/086:300.23681.100.091ComputedPeaks0.92950.000.980 c’JIU,—ao—U.0Duj(t-J0=0iCtEC00=tz00000a000,0a0,*00,*C0Qi‘CUiLa00onoUCVU,0N:20U,U,0U,U,‘S.0‘CU,C-,Ia,‘CCp0Cr,InCs” ia)000In•—•.I®01<I001<I...01w—.c0“S.c4-’1W0I00‘EI0I4-’•0a1.24-Cu•I_ItIIC0toCa,‘CUitoa,a,0E00,0=‘U•0z SECTION6SPECIALREPORTSANDSTUDIES GeoResources,LLCPh253-896-10115007PacificHwyE.,Ste.16Fx253-896-2633Fife,Washington98424May23,2014Mr.KushalVarma2609NE5thCourtRenton,WA98056(206)353-3168GeotechnicalInfiltrationFeasibilityLetter2001UnionAveNERenton,WashingtonPN:0423059077JobNo,Varma.UnionAvNElRINTRODUC11ON&SCOPEThisreportaddressesthefeasibilityofstormwaterinfiltrationfortheproposedresidentialshortplattobelocatedat2001UnionAvenueNEinRenton,Washington.Weunderstandthatyouproposetoconstructanewresidenceoneachofthenewlots.WefurtherunderstandthataccesstothelotswillbeashareddrivewayalongThesouthportionofthesite.Wealsounderstandthatyouproposetoinfiltratethestormwaterfromtheproposedroofsoneachlot,wherefeasible.TheKingCountySurfaceWaterDesignManual(2009)requiressoNlogstoconfirmsubsurfaceconditionsandtodeterminethefeasibilityofstormwaterinfiltrationatthesite.OnMay16,2014,wemonitoredtheexcavationoffivetestpitsacrossthesiteandloggedthesubsurfaceconditionsencountered.Soilsampleswerecoflectedandarepresentativesampletestedforgrainsizedistribution.ThepurposeofourserviceswastoevaluatethesurfaceandsubsurfaceconditionsatthesiteasabasisfordevelopingandprovidinggeotechnicalstormterrecommendationsfortheproposeddevelopmentSpecifically,ourscopeofservicesfortheprojectincludedthefollowing:1.Visitingthesiteandconductingageologicreconnaissancetoassessthesite’ssoil,groundwaterandslopeconditions;2.Exploringthesubsurfaceconditionsacrossthesitebymonitoringtheexcavationoftestpits;3.Completinglaboratorygrainsizeanalysisforrepresentativesitesoils;and4.Providinginfiltrationratesforthestormwaterfacilities,asappropriate.SITEcoNomoNsSurfaceConditionsThesiteissituatedinanareaofestablishedresidentialdevelopmentinRenton,Washington.Thesiteiscurrentlydevelopedwithanexistingsinglefamilyresidencewithabasementconfiguration.Thesiteisrectangularinshape,measuresapproximately330feetby135feet,andencompasses1.02acres.Thegroundsurfaceonthesitegenerallyslopesfromtheeasttothewestatinclinationsoflessthan10percent.Totaltopographicreliefonthesiteisontheorderof5verticalfeet.SiteSoilsandGeologicConditionsTheUSDANaturalResourceConservationService(NRGS)WebSoilSurveyforKingCountymapsthesoilsintheareaofthesiteasAlderwoodgravellysandyloam VarmaUnionAveNBIRRMay23,2014Page2(AgC).TheMderwoodsoilsarederivedfromglacialtillthatformonBto15percentslopesandarelistedashavinga“slighttomoderate”erosionhazard.ThenearsurfacesoilsatthesitehavebeendisturbedbynaturalweatheringprocessesThathaveoccurredsincetheirdeposition.Thegeologicmapforthesiteareaindicatesthesiteissituatedinanareaofglacialff11(Qgt).AnexcerptfromthegeologicmapisincludedatFigure4.SubsurfaceConditionsSubsurfaceconditionswereevaluatedbyexcavatingfivetestpitsacrossthesite.Thenearsurfacesoilsconsistedof0to112-to1-footoftopsoilwithnumerousrootsovermediumdensefinegrainedsandwithsiltandvaryingamountsofsmallgravel.Weinterpretthesesandysoiistorepresenttheweatheredsandyoutwashdeposits.Atdepthsof3to4feet,weencounteredadenseinduratesiltysandwithgravel,representativeofglacialfill.Theindurateglacial1111wasobservedtothefulldepthexploredinallourtestpits.Theobservedstrafigraphygenerallyconfirmedthemappedstratigraphy.ThelocationsofourexplorationsareincludedontheSitePlanasFigure2.ThesoilsencounteredwerevisuallyclassifiedinaccordancewiththeUnifiedSoilClassiflcationSystem(USCS),acopyofwhichisattachedasFigure5.TheTestPitLogsareattachedasFigures6aandfib.LaboratoryAnalysisOurgeotechnicallaboratorytestswerecompletedonarepresentativesoilsamplecollectedfromthetestpitsatthesite.Thetestsperformedincludedagrainsizeanalysis,cationexchangecapacityandorganiccontent.Ourgrainsizelaboratorytestresultsindicatedthatthesoilsonthesiteconsistofsandwithsiltandminorgravel.Theattachedlaboratorytestingsheetsgraphicallypresenttheseresults.Copiesofthegrainsizeandcation/organictestsareattached.WTABLE1LABORATORYTESTRESULTSFORON-SITESOILS.GravelContentSandContentSilUClayContentDepth-SoilType(percent)(percent)(percent)2to3.5feet28.045.027.0OutwashSandwISiltTheminimumrequiredCECis5mEqllOOginorderforsoilstobeusedasatreatmentlayerbeneathawaterqualityfacility,suchasporouspavement.Thecationexchangecapacityforthesamplewas15.7Na,mEqIlOOgandtheorganiccontentwas4.4%dryweight,whichmeetstherequirement.AporouspavementsectioncanbeprovidedatyourrequestGroundwaterConditionsNoevidenceofseasonalgroundwatersuch,asmottling,wasobservedattheuppercontactoftheglacialtillat3to4feetbelowthegroundsurfaceinthetestpitsatthetimeofexcavation.Basedonthenatureofthenearsurfacesoils,weanticipatefluctuationsinthelocalgroundwaterlevelswilloccurinresponsetoprecipitationpatterns,generaldevelopmentinthearea,andsiteutilization. Varna.UnIonAvoNE.IRRMay23,2014PageCONCLUSIONSANDRECOMMENOAPONSBasedonthesoilsencounteredinourexplorations,laboratoryanalysis,andourengineehnganalysis,weconcludethatlimitedinfiltrationofstormwaterisfeasibleintheshallowonsitesoilsencounteredonthesite.Theshallowsoilsappeartohaveadequatepermeabilityandstoragecapacitytoinfiltrateaportionofthestormwateronthesite,providedadequatedesign,constructionandmaintenancepracticesareused.Werecommendthatperviouspavementorpayersbeconsideredfortheshareddrivewayandparkingareasoftheresidences.Infiltrationtrenchesordrywellsmaybeutilizedfortheroofrunoffatthesite.Specificgeotechnicalrecommendationsforearthworkandbuildingdevelopmentmaybeprovideduponrequest.StormwaterIntiltrationWerecommendthatperviouspavementorpayersbeutilizedfortheshareddrivewayandparkingareasoftheresidences.Thiswillreducetheamountofrequiredinfiltrationviafrenchsystems.Fortheroofsystems,stormwaterinfiltrationratesweredeterminedinaccordancewiththeKingCountySurfaceWaterDesign(2009)(KCSWDM).Weperformedasieveanalysisonarepresentativesoilsamplecollectedfromthetestpitsatthesite.Weexpectthatthetrencheswillneedtoberelativelyshallow,2.5to3feetbgs(belowgroundsurface)toprovidetheminimumseparationfromTheunderlyingWIsoils.Basedontheresultsofoursieveanalysisandourexperience,thesandwithminorsiltandgravelarecomparableto“mediumsand”(SoilType28)to‘linesand,loamysand”(SoilType3).AccordingtotheKCSWDMsection4.5.1,the‘linesand,loamy”soilsrelatedto60feetper1,000sqifofrootareaforlimitedinfiltrationingravelfilledtrenches.Thefollowingformulaisusedtocalculatethelengthofroofdownspouttrenches:1=(Ar/i000)Q)(k)whereAristheareaoftheroof,Iisthelengthofthetrenchrequiredpersoiltype,andkistheregionalscalefactor.Thescalefactorforthesubjectsiteis1.Appropriatedesign,constructionandmaintenancemeasureswillberequiredtoensuretheInfiltrationratecanbeeffectivelymaintainedovertime.Itshouldbenotedthatspecialcareisrequiredduringthegradingandconstructionperiodstoavoidfinesedimentcontaminationoftheinfiltrationsystem.Thismaybeaccomplishedbyusinganalternativestormwatermanagementlocationduringgradingandconstructionactivities.Allcontractorsworkingonthesite(buildersandsubcontractors)shouldbeadvisedtoavoid“dirty”stormwaterflowingtothesite’sstormwatersystemduringconstructionandlandscapingactivitiesatthesite,Concretetrucksshouldnotbewashedorcleanedon-site.Suspendedsolidscouldclogtheunderlyingsoilandreducetheinfiltrationrateforthesystem.Toreducepotentialcloggingoftheinfiltrationsystems,theinfiltrationsystemshouldnotbeconnectedtothestormwaterrunoffsystemuntilafterconstructioniscompleteandthesiteareaislandscaped,pavedorotherwiseprotected.Temporarysystemsmaybeutilizedthroughconstruction.Periodicsweepingofthepavedareaswillhelpextendthelifeoftheinfiltrationsystem.4,. ParticleSizeDistributionReportCCCeR.’-S—•=w04t0at—SLUzLiF.zLUCxLUa-locrjrrr-[1iIiIl...IIIIIIIII9o——--J-—I_I_J_l___J_9-L__l_____I--—•---sH—-iIIIFI’III...Ll.L_II11111IFIIIII11111III6——t—•-t--—fr1F-——-——t—-l——,lIll.IIIIIIpIIII—IIII50IPIIIIIIIIIIIiiiIIIIIIII6SI14C-——H—-•-—4—--—I—,IIiII)FIII11111IIIri-.1-TnIIliiiIIIi._I_4j_..4_iL___....._F•1———i-——-!i.———IIiiIi:iJIIIhji10rrrjpHIiymiI11111111IIIIII0__..i_L.11—.J_’I-——WV10GRAINSIZE-mm.0.0.010.001I,F—rnUrnCoSt.00UtI—c)c00Ca—-oCCU—Va—wo--a00,0U00)—tto>U>,,,%Gravel%Sand%flnes0CoarseFinefcoarseFMediumFineSiftClay00[612118I2727SIEVEPERCENTSPEC.PASS?MaterialDescriptionSIZEFiNERPERCENT(XNO)BroiiSiltySandwithTraceGnvei314100NamnlMoisrnrz=18.75%i/2953/891AtberLimits#484PL=LL=P1=#1072#2063Coefficients#4054D90=8.4038b35=5.3s37D60.5569#6043D30.O975#10034Dio=#20027ClassificationUSCS=MSHTO=Remarks(noxpeciflcatonprowded)SampleNumber:090840Date:rGeoResources,LLCFãient:Project:UnionAve.NEFife,WAj[fqJ!c!o:Vamia-FigureTestedBy:TimothyBergstromCheckedBy:BradSiqearstaif IR9ursl:S±ifld&TyUapAgurnaCciomIJoi,MwF,gre3:NBSSSoilsMapF’jm4:GodogyMapFigire5:UnmedSdIQassJliNaiSystemgssee:TnIPitLogsSr*.Sin.‘*(2)Varma.UnionAvsNE.IRRMay23,2C14Page4Wetrustthisissufficientforyourcurrentneeds.Shou{dyouhaveanyquestions,orrequireadditionalinformation,pleasecontactusatyourearliestconvenience.Respectfullysubmitted,GeoResources,LLCBradBiggerstaff,WGPrincipalSPS.bflCadDvnauna,An.RAtciknanbjERADl:E”tI, zoagcuA1y—ApproximateSiteLocation(mapcreatedfromPierceCountyPublicSISwebsite)NottoScoleGeoResources,LLC5007Pac&HighwayEast,Suite16File,Washington98424Phone:253-896-1011Fax:253-896-2633IIiSiteVicinityMap2001UnionAvenueNEKenton,Washingtonriay2o14JFigure1JobID:VarmoK.NunicnAve.F GeoResources,LLC5007PacificHighwayE.Ste16Fife,Washington98424Phone:253-896-1011SiteExplorationPlan2001UnionAvenueNERenton,WashingtonNotloScaleI1I1ElApproximateSiteLocation(mapcreatedfromGoogleEanh’Legend:NottoScaleFax:253-896-2633 I(mapcreatedFromtheUSDAApproximateSiteLocationNaturalResourceConservationServiceWebScUSurvey)SoilNameIParentMaterialAQCIAldenvoodqravellysandyloamGlacialTiNSlopesErosionHazardf6iolS-MoceraleJEt_JGeoflesources,LLC5007PacificHighwayF,Ste16Fife,Washington98424Phone:253-896-1011Fax:253-896-2633USDANRCSSoBsMap2001UnionAvenueNERenton.WashingtonSoilTypeHydrologicISnilsGrcup‘N.NOttDScaie S—GeoResources,LLC5007PacificHighwayE,Ste16Fife,Washington98424Phone:253-896-1011Fax:253-896-2633Qgt—VashonGlacialTillNottoScaleIrApproximateSiteLocation(GeologyMapcreatedontheDepartmentofNaturalResources,DivisionofGeologyandEarthResources—Washington’sGeologicSurvey,WashingtonInteractiveGeologicMapwebsite,https://fortresswa.govMnrlgeologyflTheme=wigm)Ova—VashonGlacialAdvanceDutwashI__ _GeologicMap2001UnionAvenueNERenton.WashingtonMay2014JobID:VarmaKNUnlonAvt.FFigure4 SOILCLASSIFICATIONSYSTEM____ _ _MAJORDIVJSONSGROUPGROUPNAME—-____ _ _ ________ __ _SYMBOLGRAVELCLEAN(3WWELL-GRADEDGRAVEL,FINETOCOARSEGRAVELGRAVELCOARSEOPPOORLY-GRADEDGRAVELGRAINEDMornthan50%sO:LsClCoarseradionGRAVELGMSILTYGRAVELRetainedonWIThFINES--__ __ __ __ __ ___ __ __ __ __No.4SieveGCCLAVEYGRAVELSANDCLEANSANDSWWELL-GRADEDSAND,FINETOCOARSESANDMorethan50%—RetainedonSPPOORLY-GRADEDSANDMorethan50%OfCoarseFractionSANDSMSILTYSANDPassesWITHFINESNo.4SIeveScCL4YEYSANDSILTANDCLAYINORGANICMLSILTFINEGRAINEDCLCLAYSOILSUquidLimitLessthan50ORGANICCLORGANCSILT,ORGAN’GCLAYSILTANDCLAYINORGANICMNSILTCFHIGHPLASflCIW,EAS11CSILTMorethan50%PassesCRCLAYOFHIGHPLASTICITY.FATCLAYNo.200SieveUquicUnit50ormoreORGANICOHORGANICCLAY,ORGANICSILTHIGHLYORGANICSOILSPTPEATNOTES:SOILMOISTUREMODIFIERS:FieldclassificatIonisbasedonvIsualexaminallonofsoilDry-AbsenceofmcistLff,drytothetouchIngeneralaaordancewithASTM02408-90.Moist-Damp,butnovIsiblewater2.SoilclassificationusinglabomlorytestsIsbasedonASTMD2467-S0,Wet-Visiblefreewaterorsaturated,tsuarysoilisobtainedfrombelowwalertable3.DascñptbrofsoildensityorconsistencyalebasedoninterpretatIonofblowcountdata,visualappearanceofsoils,andortestdata.IIGeoResources,LLCSOILCLASSIFICATIONSYSTEM5007PacificHwy.E,Ste20Fife,Washington98424-2648Ph.253-896-1011LFx.253-896-2633FlGURE TestPitTP-1Location:SouthcentralportionofsiteDepth(feet)SoilTypeSoilDescription0-0.3SodffS0.3-4.5SPOrg3mSANDw/si,Dcc.gravel(loosetomed.dense,moist)4.5-5.0SMCrybrownsiltySANDwIgravel,0cc.cobblesCv.dense,moist)(GlacialTill?)Terminatedat5feetbelowgroundsurface.Nocavingobserved.Nogroundwaterseepageormottlingobserved.TestPitTP-2Location:SouthwestportionofsiteDepth(feet)SoilTypeSoilDescripiono-0.5Sod/DarkbrownsdyTS0.5-4.0SP6rownSAND‘iSminorsilt,octgrave(loosetomediumdense,moist)4.0-4.5SMCrybrownsiltySANDwIgravel,cobbles(v.dense,moist)Terminatedat4.5feetbelowgroundsurface.Moderatesidewallcavingobservedtofulldepthexplored.NogroundwaterseepageormoWingobserved.TestPitTP-3Location:SouthwestcofsiteDepth(feet)SoilTypeSoilDescription0-0.3Sod/TS0,3-1.0SMDkBrnsiSANDw/organics(loose,damp)0.3-3.5SPOrgSmSANDw/si,oct.gravel(loosetomed.dense,moist)3.54.0CrybrownsiltySANDw/gravel,0cc.cobbles(v.dense,moist)(Glacial1111?)Terminatedat4feetbelowgroundsurface.Nocavingobserved.Nogroundwaterseepageormowingobserved.GeoResources,LLCTestPitLogs5007PacificHighwayEast,Suile16ProposedSingleFamilyResidenceFife,Washington984246610SouthTylerPhone:253-896-1011Tacoma,WashingtonFax:253-896-2633-- -_________________________________________________________JOS#BenamlnRyan.STyler.SFR.TPMay2014Figureba TestPitTP4Location:NWportionofsiteDepth_(feet)Soil_TypeSoil_Description0-0.3Sod/IS0.3-3.5SPDrgBmSANDWIsi,oct.gravel(loosetomed.dense,moist)3.5-4.0SMGrybrownsiltySANDwIgravel,oco.cobbles(v.dense,moist)(GlacialTill?)Terminatedat4feelbelowgroundsurface.Nocavingobserved.Nogroundwaterseepageormottlingobserved.TestPitTP-5Location:SouthwestportionofsiteDepth_(feet)Sod_TypeSoil_Description0-0.5SodlDarkbrownsdyTS0.5-4.5SPBrownSANDwIminorsilt,cccgravel(loosetomediumdense,moist)4.5-5.0SMGrybrownsiltySANDvUgravel,cobbles(v.dense,moist)Terminatedat4.5feetbelowgroundsurface.Moderatesidewallcavingobservedtofulldepthexplored.Nogroundwaterseepageormottlingobserved.By:BPBMaylG,2014GeoResources,LLC5007PacifIcHIghwayEast,Suite16Fife,Washington98424Phone:253-898-1011Fax:253-896-2633TestPitLogsProposedSingleFamilyResidence6610SouthTylerTacoma,WashingtonJOB3Varma.UnionAve.IRMay2014Figureb ___ _SPECTRALaboratories___________ ____2221RossWay•Tacoma,WA9342)•(253)2724850•Fax(253)572-9838wnspecta-Iab.cam05/20i2014-ProjectVarma,Kushal-UmonAveNEGeoResources,LLCClientID:090839TP-l5007PacificHwy.ESampleMatrix:SoilSuite16DateSampled:05/15/2014Fife,WA98424DateRecthve±05/15/2014SpectraProject:2014050454SpectraNumber:IAnalyteResultUnitsMethodOrganicMatter4.4wt.%ThyASTM0-2974-13CationExchangeCapacity15.7Na,mEq/bOgSW8469081SPECTRALABORATORIESSteveHibbs.LabororyManagerPagsIofI CCC-CCM(ari-HDiDi=IICCDiCCCD0DiIaz=Di07CCCDitoii7CCCCDDiC--tCD-nDiaCT,‘CCCCDiCItrcrClCDcm-oiCDS..110CD0•rrnC•J.InC-CCCDi-Cb0C—zrrrnCDmCL11p.(ACCz0CCDDiCI”-Corno70H”ICrz0CC”DiCDi-CftC9,CC0SDiDiCCCStoto—t3flbit,°,Ct-CPtoCUiVa—.CDC,,arIll7rC0rnCD0,3,C0In-CCC0zIyC),3,-0-ICCD.0IrrnCCNUMBEROFCONTAINERS1CCCCVCDDi3-CID3-po-c53WIt•CZC,0—ao05C0==‘Ct0-g.aII1-o-CC-C=9Ca00‘C0—IDar-g—50==DiCaIDCCC=C(\7}rsaxFf—TINWYPH-Gg—NYrPH-ox1654SOT-HEM(WH):EEZEEZ1HEM82501624VGA8280CHLORSOLVENTS08270-825SEMIVOA0————._____________827CPMIPNAaaeaisoepcatCEDZEEIZEZEZCo-tVT,CrHCz0CrCDU)CD3tCDCD-vCDEtIIIIIIIIIIIIITOLl’METALSflORA8r7’S‘1TaPMrALS(SPECIFy)007-C-1‘V————PH90401S045.ThTCX’EOXRASHPOINT9OSOLIDS(SPECWY)EEZEZEZE1ca-I—7IxLCH2P11---I—-----40a20m0C0I SECTION7OTHERPERMITS SECTION8ESCANALYSTSANDDESIGN T ——————————a a a a I _ 011111 --LsC t.iP t1L-J ,1 7lGQ —I i -—}----—-—-—--——.-z C-i i U• (fi) ‘0 “a 1J© —1 nr— — -- - ‘‘M——————— —r •— —————— ——•————t r - —————- — —-1 — J— ZiZZ1E1EREEFE -r-• -ifH I 00 - s IjtI -r -j--,-, -‘ThH-1 4%tL -- --- -H(J’t ----___it---’-- --H-—-1——-—--tt----t - - 0xm0 I”0 o>I 0rm0 ç z -1 0m0 a) 0‘1 SECTION9BONDQUANTITIES,FACILITYSUMMARIES,ANDDECLARATIONOFCOVENANT SECTION10OPERATIONSANDMAINTENANCEMANUAL KINGCOUNTY,WASHINGTON,SURFACEWATERDESIGNMANUALAPPENDIXAMAINTENANCEREQUIREMENTSFORFLOWCONTROL,CONVEYANCE,ANDWQFACILITIESThisappendixcontainsthemaintenancerequirementsforthefollowingtypicalstormwatercontrolfacilitiesandcomponents:No.I—DetentionPonds(p.A-2)No.2—InfiltrationFacilities(p.A-3)No.3—DetentionTanksandVaults(p.A-5)No.4—ControlStructure/FlowRestrictor(p.A-7)No.5—CatchBasinsandManholes(p.A-9)No.6—ConveyancePipesandDitches(p.A-Il)No.7—DebrisBarriers(e.g.,TrashRacks)(p.A-12)No.8—EnergyDissipaters(p.A-13)No.9—Fencing(p.A-14)No.10—Gates/Bollards/AccessBarriers(p.A-IS)No.II—Grounds(Landscaping)(p.A-16)No.12—AccessRoads(p.A-17)No.13—BasicBiofiltrationSwale(grass)(p.A-18)No.14—WetBiofiltrationSwale(p.A-19)No.15—FilterStrip(p.A-20)No.16—Wetpond(p.A-21)No.17—Wetvault(p.A-23)No.18—StonnwaterWetland(p.A-24)No.19—SandFilterPond(p.A-26)No.20—SandFilterVault(p.A-28)No.21—Stoimfilter(CartridgeType)(p.A-30)No.22—BaffleOil/WaterSeparator(p.A-32)No.23—CoalescingPlateOil/WaterSeparator(p.A-33)No.24—CatchBasinInsert(p.A-35)2009SurfaceWaterDesignManual—AppendixA1/912009A-I APPENDIXAMAINTENANCEREQUIREMENTSFLOWCONTROL,CONVEYANCE,ANDWQFACILITIES1/9/2009NO.1—DETENTIONPONDSMaintenanceDefectorProblemIConditionsWhenMaintenanceIsNeededResultsExpectedWhenComponentMaintenanceIsPerformedSiteTrashanddebrisAnytrashanddebriswhichexceedIcubicfootTrashanddebrisclearedfromsite.per1,000squarefeet(thisIsaboutequaltotheamountoftrashitwouldtaketofilluponestandardsizeofficegarbagecan).Ingeneral.themshouldbenovisualevidenceofdumping.NoxiousweedsAnynoxiousornuisancevegetationwhichmayNoxiousandnuisancevegetationconstituteahazardtoCountypersonnelortheremovedaccordingtoapplicablepublic,regulations.NodangerofnoxiousvegetationwhereCountypersonnelorthepublicmightnormallybe.ContaminantsandAnyevidenceofcontaminantsorpollutionsuchMaterialsremovedanddisposedofpollutionasoil,gasoline,concreteslurriesorpaint,accordingtoapplicableregulations.SourcecontrolBMPsimplementedifappropriate.Nocontaminantspresentotherthanasurfaceoilfilm.GrasslgroundcoverGrassorgroundcoverexceeds18inchesinGrassorgroundcovermowedtoaheight.heightnogreaterthan6inches.ToporSideSlopesRodentholesAnyevidenceofrodentholesiffacilityisactingRodentsremovedordestroyedandofDam,Bermorasadamorberm,oranyevidenceofwaterdamorbermrepaired.Embankmentpipingthroughdamorbermviarodentholes.TreegrowthTreegrowththreatensintegrityofslopes,doesTreesdonothinderfacilitynotallowmaintenanceaccess,orinterfereswithperformanceormaintenancemaintenanceactivity.Iftreesamnotathreatoractivities.notinterferingwithaccessormaintenance,theydonotneedtoberemoved.ErosionErodeddamageover2inchesdeepwherecauseSlopesstabilizedusingappropriateofdamageisstillpresentorwherethereiserosioncontrolmeasures,Iferosionpotentialforcontinuederosion.Anyerosionisoccurringoncompactedslope,aobservedonacompactedslope,licenseddullengineershouldbeconsultedtoresolvesourceoferosion.SettlementAnypartofadam,bermorembankmentthathasToporsidesloperestoredtodesignsettled4incheslowerthanthedesignelevation-dimensions.ifsettlementissignificant,alicensedcivilengineershouldbeconsultedtodeterminethecauseofthesettlement.StorageAreaSedimentAccumulatedsedimentthatexceeds10%oftheSedimentcleanedouttodesignedaccumulationdesignedponddepth.pondshapeanddepth;pondreseededifnecessarytocontrolerosion.LinerdamagedLinerisvisibleorponddoesnotholdwaterasLinerrepairedorreplaced.(IfApplicable)designed.Inlet/OutletPipe.SedimentSedimentfilling20%ormoreofthepipe.Inlet/outletpipesclearofsediment.accumuledonTrashanddebrisTrashanddebrisaccumulatedininlet/outletNotrashordebrisInpipes.pipes(includesiloatablesandnon-floatables).DamagedCrackswiderthanVrinchatthejointoftheNocracksmorethan%-inchwideatinlet/outletpipesoranyevidenceofsoilenteringthejointoftheinlet/outletpipe.atthejointsoftheinlet/outletpipes.EmergencyTreegrowthTreegrowthimpedesfloworthreatensstabilityofTreesremoved.Overflow/SpilWayspiliway.RockmissingOnlyonelayerofrockexistsabovenativesoilinSpiliwayrestoredtodesignareafivesquarefeetorlargeroranyexposureofstandards.nativesoilonthespiliway.A-22009SurfaceWaterDesignManual—AppendixA APPENDIXAMAINTENANCEREQUIREMENTSFORFLOWCONTROL,CONVEYANCE,ANDWQFACFLLTIESNO.4—CONTROLSTRUCTUREIFLOWRESTRICTORMaintenanceDefectorProblemCondItionWhenMaintenanceIsNeededResultsExpectedWhenComponentMaintenanceIsPerformedStructureTrashanddebrisTrashordebrisofmorethan34cubicfootwhichNoTrashordebrisblockingorislocatedimmediatelyInfrontofthestructurepotentiallyblockingentrancetoopeningensblackingcapacityofthestructurebystructure.morethan10%.Trashordebrisinthestructurethatexceeds/3Notrashordebrisinthestructure.thedepthfromthebottomofbasintoinvertthelowestpipeintooroutofthebasin.Depositsofgarbageexceeding1cubicfootinNoconditionpresentwhichwouldvolume,attractorsupportthebreedingofinsectsorrodents.SedimentSedimentexceeds60%ofthedepthfromtheSumpofstructurecontainsnobottomofthestructuretotheinvertofthelowestsediment.pipeintooroutofthestructureorthebottomoftheFRQP-Tsectionoriswithin6InchesoftheinvertofthelowestpipeintooroutofthestructureorthebottomoftheFROP-Tsection.DamagetoframeComerofframeextendsmorethan%inchpastFrameisevenwithcurb.and/ortopslabcurbfaceintothestreet(Ifapplicable).Topslabhasholeslargerthan2squareinchesorTopslabisfreeofholesando’acks.crackswiderthan34inch.FramenotsittingHushontopslab,i.e.,Frameissittingflushontopslab.separationofmorethan‘hinchoftheframefromthetopslab.CracksinwallsorCrackswiderthan34inchandlongerthan3feet,Structureissealedandstructurallybottomanyevidenceofsoilparticlesenteringstructuresound.throughcracks,ormaintenancepersonjudgesthatstructureisunsound.Crackswiderthan34Inchandlongerthan1footNocracksmorethan‘I.inchwideatatthejointofanyinlet/outletpipeoranyevidencethejointofinlet/outletpipe.ofsoilparticlesenteringstructurethroughcracks.SettlemenuStructurehassettledmorethan1inchorhasBasinreplacedorrepairedtodesignmisalignmentrotatedmorethan2Inchesoutofalignment.standards.DamagedpipejointsCrackswiderthanWinchatthejointoftheNocracksmorethanWinchwideatinlet/outletpipesoranyevidenceofsoilenteringthejointofinlet/outletpipes.thestructureatthejointoftheinlet/outletpipes.ContaminantsandAnyevidenceofcontaminantsorpollutionsuchMaterialsremovedanddisposedofpollutionasoil,gasoline,concreteslurriesorpaint,accordingtoapplicableregulations.SourcecontrolBMPsimplementedifappropriate.Nocontaminantspresentotherthanasurfaceoilfilm.LadderrungsmissingLadderisunsafeduetomissingrungs,Laddermeetsdesignstandardsandorunsafemisalignment,rust,cracks,orsharpedges.allowsmaintenancepersonsafeaccess.FROP-TSectionDamageTsectionisnotsecurelyattachedtostructureTsectionsecurelyattachedtowallwallandoutletpipestructureshouldsupportatandoutletpipe.least1,000lbsofupordownpressure.Structureisnotinuprightposition(allowuptoStructureincorrectposition.10%fromplumb).ConnectionstooutletpipearenotwatertightorConnectionstooutletpipearewatershowsignsofdeterioratedgrout.tight;structurerepairedorreplacedandworksasdesigned.Anyholes—otherthandesignedholes—intheStructurehasnoholesotherthanstructure,designedholes.CleanoutGateDamagedormissingCleanoutgateismissing.Replacecleanoutgate.2009SurfaceWaterDesignManual—AppendixA119/2009A-7 APPENDIXAYLMNTENANCEREQUIREMENTSFLOWCONTROL,CONVEYANCE,ANDWQFACiLITIESNO.4-CONTROLSTRUCTUREIFLOWRESTRICTORMaintenanceDefectorProblemConditionWhenMaintenanceIsNeededResultsExpectedWhenComponentMaintenanceisPerformedCleanoutgateisnotwatertight.Gateiswatertightandworksasdesigned.GatecannotbemovedupanddownbyoneGatemovesupanddowneasilyandmaintenanceperson.iswatertight.Chain/rodleadingtogateismissingordamaged.ChainisinplaceandworksasIdesigned.OrificePlateDamagedormissingControldeviceisnotworkingproperlyduetaPlateisinplaceandworksasmissing,outofplace,orbentorificeplate.designed.ObstructionsAnytrash,debris,sediment,orvegetationPlateisfreeofallobstructionsandblockingtheplate.worksasdesigned.OverflowPipeObstructionsAnytrashordebrisblocking(orhavingthePipeisfreeofallobstructionsandpotendalofblocking)theoverflowpipe.worksasdesigned.DeformedordamagedLipofoverflowpipeisbentordeformed.OverflowpipedoesnotallowlipoverflowatanelevationlowerthandesignInlet/OutletPipeSedimentSedimentfilling20%ormoreofthepipe.Inlet/outletpipesdearofsediment.accumulationTrashanddebrisTrashanddebrisaccumulatedininlet/outletNotrashordebrisinpipes.pipes(includesDoatablesandnon-floatables).DamagedCrackswiderthan14-inchatthejointoftheNocracksmorethan%-inchwideatInlet/outletpipesoranyevidenceofsoilenteringthejointoftheinlet/outletpipe.atthejointsoftheinlet/outletpipes.MetalGratesUnsafegrateopeningGratewithopeningwiderthan‘I,Inch.Grateopeningmeetsdesign(IfApplicable)standards.TrashanddebrisTrashanddebristhatisblockingmorethan20%Gratefreeoftrashanddebris.ofgratesurface,footnotetoguidelinesfordisposalDamagedormissingGratemissingorbrokenmember(s)ofthegrate,Grateisinplaceandmeetsdesignstandards.ManholeCover/LidCover/lidnotinplaceCover/lidismissingoronlypartiallyinplace.Cover/lidprotectsopeningtoAnyopenstructurerequIresurgentstructure.maintenance,LockingmechanismMechanismcannotbeopenedbyoneMechanismopenswithpropertools.NotWorkingmaintenancepersonwithpropertools.Boltscannotbeseated.Self-lockingcover/liddoesnotwork.Cover/liddifficulttoOnemaintenancepersoncannotremoveCover/lidcanberemovedandRemovecover/lidafterapplying80lbs.oflift,reinstalledbyonemaintenanceperson.1/912009jA-82009SurfaceWaterDesignMaaual—AppendixA APPENDIXAMAINTENANCEREQUIREMENTSFORFLOWCONTROL,CONVEYANCE,ANDWQFACILITIESNO.5—CATCHBASINSANDMANHOLESMaintenanceDefectorProblemConditionWhenMaintenanceisNeededResultsExpectedWhenComponentMaintenanceisPertonnedStructureSedimentSedimentexceeds60%ofthedepthfromtheSumpofcatchbasincontainsnobottomofthecatchbasintotheinvertofthesediment.lowestpipeintooroutofthecatchbasinoriswithin6inchesoftheinvertofthelowestpipeintooroutofthecatchbasin.TrashanddebrisTrashordebrisofmorethan%cubicfootwhichNoTrashordebrisblockingOrislocatedimmediatelyinfrontofthecatchbasinpotentiallyblockingentrancetoopeningorisblockingcapacityofthecatchbasincatchbasin.bymorethan10%.TrashordebrisinthecatchbasinthatexceedsNotrashordebrisinthecatchbasin./thedepthfromthebottomofbasintoinvertthelowestpipeintooroutofthebasin.DeadanimalsorvegetationthatcouldgenerateNodeadanimalsorvegetationodorsthatcouldcausecomplaintsordangerouspresentwithincatchbasin.gases(e.g..methane).DepositsofgarbageexceedingIcubicfootinNoconditionpresentwhichwouldvolume,attractorsupportthebreedingofinsectsorrodents.DamagetoframeCornerofframeextendsmorethan%inchpastFrameisevenwithcurb.and/ortopslabcurbfaceintothestreet(Ifapplicable).Topslabhasholeslargerthan2squareinchesorTapslabisfreeofholesandcracks.crackswiderthan¼inch.FramenotsittingHushontopslab,i.e.,Frameissittingflushontopslab.separationofmorethan¼inchoftheframefromthetopslab.CracksinwallsorCrackswiderthan34inchandiongerthan3feet,Catchbasinissealedandbottomanyevidenceofsoilpartidesenteringcatchstructurallysound.basinthroughcracks,ormaintenancepersonjudgesthatcatchbasinisunsound.Crackswiderthan34inchandlongerthan1footNocracksmorethan1/4inchwideatatthejointofanyinlet/outletpipeoranyevidencethejointofinlet/outletpipe.ofsoilparticlesenteringcatchbasinthroughcracks.Settlement?Catchbasinhassettledmorethan1InchorhasBasinreplacedorrepairedtodesignmisalignmentrotatedmorethan2inchesoutofalignment.standards.UamagedpipepintsCrackswiderthan½-inchatthejointottheNocracksmorethanYrincflwideatinlet/outletpipesoranyevidenceofsoilenteringthejointofinlet/outletpipes.thecatchbasinatthejointoftheinlet/outletpipes.ContaminantsandMyevidenceofcontaminantsorpollutionsuchMaterialsremovedanddisposedofpollutionasoil,gasoline,concreteslurriesorpaint.accordingtoapplicableregulations.SourcecontrolBMPsimplementeditappropriate.Nocontaminantspresentotherthanasurfaceoilfilm.Inlet/OutletPipeSedimentSedimentfilling20%ormoreofthepipe.Inlet/outletpipesclearofsediment.accumulationTrashanddebrisTrashanddebrisaccumulatedininlet/outletNotrashordebrisinpipes.pipes(includesfloatabtesandnon-floatables).DamagedCrackswiderthan34-inchatthejointoftheNocracksmorethan¼-inchwideatinlet/outletpipesoranyevidenceofsoilenteringthejointoftheinlet/outletpipe.atthejointsoftheinlet/outletpipes.2009SurthceWaterDesignManual—AppendixA1/9/2009A-9 APPENDIXAMAINTENANCEREQUIREMENTSFLOWCONTROL,CONVEYANCE.ANDWQFACILITIESNO.5—CATCHBASINSANDMANHOLESMaintenanceDefectorProblemConditionWhenMaintenanceisNeededResultsExpectedWhenComponentMaintenanceIsPerformedMetalGratesUnsafegrateopeningGratewithopeningwiderthaniinch.Grateopeningmeetsdesign•(CatchBasins)standards.TrashanddebrisTrashanddebristhatisblockingmorethan20%Gratefreeoftrashanddebris.ofgratesurface,footnotetoguidelinesfordisposalDamagedormissingGratemissingorbrokenmember(s)ofthegrate.GrateisinptaceandmeetsdesignAnyopenstructurerequiresurgentstandards.maintenance,ManholeCover/LidCover/lidnotinplaceCover/lidismissingoronlypartiallyinplace.Cover/lidprotectsopeningtoAnyopenstructurerequiresurgentstiucture.maintenance.LockingmechanismMechanismcannotbeopenedbyoneMechanismopenswithpropertools.NotWorkingmaintenancepersonwithpropertools.Boltscannotbeseated.Self-lockingcover/liddoesnotwork.Cover/liddifficutttoOnemaintenancepersoncannotremoveCover/lidcanberemovedandRemovecover/lidafterapplying80lbs.oflift.reinstalledbyonemaintenanceperson.1/9/2009iiA-102009SurfaceWaterDesignManual—AppendixA APPENDIXAMAINTENANCEREQUIREMENTSFORFLOWCONTROL,CONVEYANCE,ANDWQFACILITIES1NO.6-CONVEYANCEPIPESANDDITCHESMaintenanceDefectorProblemIConditionsWhenMaintenanceisNeededResultsExpectedWhenComponentMaintenanceisPedonnedPipesSediment&debrisAccumulatedsedimentordebristhatexceedsWaterflowsfreelythroughpipes.accumulation20%ofthediameterofthepipe.Vegetation/rootsVegetationlrootsthatreducefreemovementofWaterflowsfreelythroughpipes.walerthroughpipes.ContaminantsandAnyevidenceofcontaminantsorpollutionsuchMaterialsremovedanddisposedofpollutionasoil,gasoline,concreteslurriesorpaint,accordingtoapplicableregulations.SourcecontrolBMPsimplementedifappropriate.Nocontaminantspresentotherthanasurfaceoilfilm.DamagetoprotectiveProtectivecoatingIsdamaged:rustorcorrosionPiperepairedorreplaced.coatingorcorrosionisweakeningthestructuralintegrityofanypartofpipe.DamagedAnydentthatdecreasesthecrosssectionareaofPiperepairedorreplaced.pipebymomthan20%orisdeterminedtohaveweakenedstructuralintegrityofthepipe.DitchesTrashanddebrisTrashanddebrisexceeds1cubicfootper1000Trashanddebrisclearedfromsquarefeetofditchandslopes,ditches.SedimentAccumulatedsedimentthatexceeds20%oftheDitchcleaned/flushedofallsedimentaccumulationdesigndepth.anddebrissothatitmatchesdesign.NoxiousweedsMynoxiousornuisancevegetationwhichmayNoxiousandnuisancevegetationconstituteahazardtoCountypersonnelortheremovedaccordingtoapplicablepublic,regulations.NodangerofnoxiousvegetationwhereCountypersonnelorthepublicmightnormallybe.ContaminantsandAnyevidenceofcontaminantsorpollutionsuchMaterialsremovedanddisposedofpollutionasoil,gasoline,concreteslurriesorpaint,accordingtoapplicableregulations.SourcecontrolBMPsimplementedifappropriate.Nocontaminantspresentotherthanasurfaceoilfilm.VegetationVegetationthatreducesfreemovementofwaterWaterflowsfreelythroughditches.throughditches.ErosiondamagetoMyerosionobservedonaditchslope.Slopesarenoteroding.slopesRockliningoutofOnelayerorlessofrockexistsabovenativesoilReplacerockstodesignstandards.placeormissing(Ifarea5squarefeetormore,anyexposednativeApplicable)soil.2009SurfaceWaterDesignManual—AppendixA1/9/2009A-Il