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HomeMy WebLinkAboutERC Report and Exhibits_Highlands Reservoir_ 15-000864DEPARTMENTOFCOMMUNIANDECONOMICDEVELOPMENT—;;OF’-------enton0ENVIRONMENTALREVIEWCOMMITTEEREPORTERCMEETINGDATE:January25,2015ProjectName:HighlandsReservoir&EmergencyGeneratorProjectNumber:LUA1S-000864,ECF,CU-H,SA-H,MODProjectManager:KrisSorensen,AssocãatePlannerOwner:CityofRenton,1055SGradyWay,RentonWA98057Applicant/Contact:J.D.Wilson,PublicWorks,CityofRenton,1055SGradyWay,RentonWA98057ProjectLocation:3410NE12thandNE12thRight-of-WayfromOlympiaAveNEtoEdmondsAveNEProjectSummary:TheapplicantisrequestingEnvironmental(SEPA)Review,HearingExaminerSitePlanandConditionalUsePermitReviews,andaModificationtostreetimprovementsfordevelopmentattheHighlandsReservoirsiteandassociatedimprovementswithintheNE12thstcorridor.The204,555squarefootpropertyat3410NE12thsislocatedintheResidential10(R-10)zone.TheprojectispartoftheCity’spublicdrinkingwaterutility.Theproposedon-siteimprovementsaretheconstructionofa6.3million-gallonreinforcedconcretepartiallyburiedwaterstoragetank,replacementoftheemergencygenerator,utilitiesimprovements,newaccessroad,andrelocationofexistingtelecommunicationequipment.Off-siteimprovementswithintheNE12thStright-of-wayincludeanewconnectiontothewastewaterinterceptoratNE12thandNESunsetBlvd,replacementofwatermainpipesthatconnecttoNE12thStreetandEdmondsAveNE,andstreetimprovementsalongthereservoirsite.AccesstothesiteisthroughtwodrivewaysfromNE12thSt.TheprojectislocatedwithintheWellheadProtectionAreazone.Theprojectwouldexcavate20,000cubicyardsofsoilsandimport3,000cubicyards.Retentionof17treesisproposed.Newlandscapingandscreeningisproposed.TheapplicantrequestsastreetmodificationfromtheRMC4-6-060standardsalong3410NE12thSt.Theapplicantproposes2feetofright-of-waydedicationalongtheprojectsideofNE12thStandnewcurbandgutter,5-footbikelane,8-footplantingstrip,and5-footsidewalk.Documentssubmittedincludeenvironmentalchecklist,trafficstudy,arborist,geotechnical,anddrainagereports.Thetotalprojectvalueisestimatedat$13,981,000.Exist.Bldg.AreaSF:55,191SFProposedNewBldg.Area(footprint):45,561SFProposedNewBldg.Area(gross):45,561SFSiteArea:204,555SFat3410NE12thNETotalBuildingAreaGSF:100,752SF12thStRight-of-WayfromOlympiaAveNEtoEdmondsAveNESTAFFStaffRecommendsthattheEnvironmentalReviewCommitteeissueaDeterminationRECOMMENDATION:ofNon-Significance-Mitigated(DNS-M).i_---ProjectLocationI’;.,:,ERCReport15-000864 CityofRentonDepartmentofCommunity&NpmicDevelopment4nvironmentalReviewCommitteeReportHIGHLANDSRESERVOIR&EMERGENCYGEPATORLUA15-OOO864,EDF,CU-H,SA-H,MODReportofianuary25,2015Page2of5PARTONE:PROJECTDESCRIPTIONIBACKGROUNDThesubjectproposalispartofanoverallmulti-phasedmasterplanforthesite.Futurephasesbeyondthesubjectproposalrequireseparatelanduseapprovalsandconsistofdemolitionofexistingreservoirs,constructionofanewwaterstoragetank,andreplacementoftheexistingelevatedwaterstoragetank.AmasterplanfortheHighlandsReservoirSitehasbeendevelopedandisdocumentedintheCityofRentonPublicWorksDepartment’sHighlandsReservoirSiteMasterPlan,datedOctober2015(Exhibit4,page3).TheSiteMasterPlanfuturedevelopment,beyondthesubjectproposal,aredemolitionoftheexisting1.5milliongallonand2milliongallonwaterstoragetanksafterthecompletionofthereplacementoftheMountOlivetwaterstoragetank,replacementoftheHighlandsReservoirboosterpumpstation,andreplacementoftheHighlandselevatedwaterstoragetank.Thesubjectproposalwouldoccurintwoparts(Exhibit4,page4-5).Thefirstpartwouldbegeneratorreplacement,telecommunicationfacilitiesrelocation,fencereplacement,andplantingoftreesontheinsideofthefencealongNE12thStreet.Thesecondpartwouldbetheconstructionofthenewwaterstoragetankandallprojectelementsnotpartofthefirstphaseincludingtheoff-siteworkwithintheNE12thStcorridor.Off-siteimprovementswithintheNE12thStright-of-wayincludeanewpipeconnectiontothewastewaterinterceptorattheintersectionofNE12thandNESunsetBlvd,replacementofwatermainfromthereservoirsitetotheintersectionofNE12thStreetandEdmondsAveNE,andNE12thStright-of-wayimprovementsalongthesouthsideofthereservoirproperty.AgencycommentswereprovidedbyKingCountyMetroonJanuary12,2016requestingthatthedesignofthestreetfrontageincludepublictransitimprovements(Exhibit5).Thecommentsstatethatthedesignofthestreetfrontagealongthereservoirsiteat3410NE12thStshouldincludeanADAfrontdoorlandingpad,reardooralightingpads,andanewshelterfootingasapartofthisprojecttoensureadequatetransitaccessandsafety.PARTTWO:ENVIRONMENTALREVIEWIncompliancewithRCW43.21C.240,thefollowingenvironmental(SEPA)reviewaddressesonlythoseprojectimpactsthatarenotadequatelyaddressedunderexistingdevelopmentstandardsandenvironmentalregulations.A.EnvironmentalThresholdRecommendationBasedonanalysisofprobableimpactsfromtheproposal,staffrecommendsthattheResponsibleOfficials:IssueaDNS-Mwitha14-dayAppealPeriod.B.MitigationMeasure1.TheapplicantshallcomplywiththerecommendationsincludedinTechnicalMemorandumReviewofExistingGeologic,Hydrogeologic,andGeotechnicalInformation,preparedbyRH2Engineeringnc,datedDecember19,2014andGeotechnicalReport,preparedbyZZA-Terracon,datedJanuary19,2009(Exhibit8).ERCReport15-000864 ‘)CityofRentonDepartmentofCommunity&EnomicDevelopmenttnvironmentalReviewCommitteeReportHIGHLANDSRESERVOIR&EMERGENCYGENERATORLUA15-000864,EDF,CU-H,SA-H,MODReportofJanuary25,2015Page3of5C.ExhibitsExhibit1:EnvironmentalReviewCommitteeReportExhibit2:ProjectVicinityMapExhibit3:ZoningMapExhibit4:EnvironmentalChecklist,preparedbyCityofRenton,datedDecember2,2015Exhibit5:AgencyComment,KingCountyMetro,emaildatedJanuary12,2016Exhibit6:ResponseemailtoAgencyComment,CityofRentonPublicWorks,datedJanuary12,2016Exhibit7:TechnicalInformationReport,preparedbyRH2Engineeringnc,datedNovember2015Exhibit8:TechnicalMemorandumReviewofExistingGeologic,Hydrogeologic,andGeotechnicalInformation,preparedbyRH2Engineeringnc,datedDecember19,2014Exhibit9:ConstructionMitigationPlanExhibit10:SlopesMap,CityofRentonExhibit11:AquiferProtectionZoneMap,CityofRentonExhibit12:ProposedDrainagePlan,Sheet15,preparedbyRH2EngineeringInc,datedDecember1,2015Exhibit13:ProposedGradingPlan,Sheet11,preparedbyRH2Engineeringnc,datedDecember1,2015Exhibit14:ProposedTransmissionMain&Off-SiteUtilities,Sheet13,preparedbyRH2EngineeringInc,datedDecember1,2015Exhibit15:AdvisoryNotesD.EnvironmentalImpactsTheProposalwascirculatedandreviewedbyvariousCityDepartmentsandDivisionstodeterminewhethertheapplicanthasadequatelyidentifiedandaddressedenvironmentalimpactsanticipatedtooccurinconjunctionwiththeproposeddevelopment.Staffreviewershaveidentifiedthattheproposalislikelytohavethefollowingprobableimpacts:1.EarthImpacts:Theprojectproposesexcavationandgradingattheexistingpublicwaterutilitypropertyat3410NE12thforthedevelopmentofthenewpartiallyburiedwatertank.EarthworkisalsoproposedbelowthestreetsurfaceintheexistingNE12thsright-of-waybetweenOlympiaAveNEandEdmondsAveNEforinstallationofwaterandsewerpipes.TheapplicantsubmittedanEnvironmentalChecklist,preparedbyCityofRentonPublicWorksDepartment,datedDecember2,2015andaTechnicalMemorandumReviewofExistingGeologic,Hydrogeologic,andGeotechnicalInformation,preparedbyRH2Engineeringnc,datedDecember19,2014withtheprojectapplication(Exhibits4and8).Thetopographyofthewaterutilitypropertyisgenerallyflatwithanapproximatetwopercentslopeacrossthesite.ThetopographyoftheNE12thright-of-wayisgenerallyflatbetweenSunsetBlvdNEandEdmondsAveNEwithagentleslopeupwardfromwesttoeasttothereservoirsitefromtheintersectionatSunsetBlvdNE.Thesteepestslopesonthereservoirsitearetheman-madeengineeredbermssurroundingthetwoexistingpartiallyburiedwaterreservoirsbetween15and25percent(Exhibit8,page2).Gradingatthe3410NE12thpropertyisanticipatedat3,000cubicyardsofimportand20,000cubicyardsofexporttopartiallyburythenewstoragetank(Exhibit4,page6).Thesoilsatthesiteareidentifiedasnativedenseglacialtillandallboringtestsencountereddensetoverydensesandwithsiltandgraveldownto40feetbelowgroundsurface(Exhibit8).Groundwaterwasnotencounteredinanyoftheborings.ThesubmittedGeotechnicalReportevaluatedpotentialgeologicalhazardsatthesiteandconcludedthattheriskforliquefaction,erosion,andunstableslopesisverylow(Exhibit8,page2).ERCReport15-000864 n•1CityofRentonDepartmentofCommunity&I±LnomicDevelopmentEnvironmentalReviewCommitteeReportHIGHLANDSRESERVOIR&EMERGENCYGENERATORLUA15-000864,EDF,CU-H,SA-H,MODReportofJanuary25,2015Page4of5TheearthworkwithintheNE12thscorridorconsistsofthestreetimprovementsalongthe3410NE12thpropertyandundergroundinstallationofnewandreplacementpipes.Anewconnectiontothecitysewersystemisproposed.Anew12-inchpipewouldconnectawetwellatthereservoirfacilitytoamanholeinSunsetBlvdNEandwouldbeapproximately1,350feetinlength(Exhibit12).ThesubjectproposalalsoincludesreplacementofwatermainsinNE12thwithapproximately3,150linearfootlengthof24-inchdiameterductileironwatermain(Exhibit12).ThesubmittedGeotechnicalReportprovidesrecommendationsregardingsitepreparation,excavations,permanentslopes,foundationconsiderations,floorslabsupport,subgradewalls,andhydrostaticuplift.StaffrecommendsthattheapplicantcomplywiththerecommendationsasoutlinedinthesubmittedTechnicalMemorandumReviewofExistingGeologic,Hydrogeologic,andGeotechnicalInformation,preparedbyRH2Engineeringlnc,datedDecember19,2014andGeotechnicalReport,preparedbyZZATerracon,datedJanuary19,2009(Exhibit8).MitigationMeasure:1.TheapplicantshallcomplywiththerecommendationsincludedinTechnicalMemorandumReviewofExistingGeologic,Hydrogeologic,andGeotechnicalInformation,preparedbyRH2Engineeringlnc,datedDecember19,2014andGeotechnicalReport,preparedbyZZA-Terracon,datedJanuary19,2009(Exhibit8).Nexus:SEPAEnvironmentalRegulations,RMC4-4-060Grading,ExcavationandMiningRegulations.2.Watera.AquiferProtectionAreaImpacts:TheprojectislocatedwithintheCityofRentonWellheadProtectionZone2area(Exhibit11).Approximately3,000cubicyardsoffillwouldbebroughttothereservoirsiteandfillisalsoanticipatedwiththeassociatedNE12thcorridorimprovements.TheoverallpurposeoftheaquiferprotectionregulationsistoprotectaquifersusedaspotablewatersupplysourcesbytheCityfromcontaminationbyhazardousmaterials.Someusesarerestrictedthatstore,handle,treat,use,orproducesubstancesthatposeahazardtogroundwaterquality.Sincefillisproposedforprojectdevelopment,afillsourcestatementwouldberequiredtobesubmittedtotheCitytoensurecleanfillisused.Thefillsourcestatementshallbesubmittedwiththeconstructionpermitapplication.ImpactstotheWellheadProtectionAreaarenotanticipatedasaresultofthesubjectproject.MitigationMeasures:Nofurthermitigationrequired.Nexus:Notapplicable.b.StormWaterImpacts:ATechnicalInformationReport(TIR),preparedbyRH2EngineeringInc,datedNovember2015,wassubmittedwiththeprojectapplication(Exhibit7).ThesubmittedTIRaddressesconstructionofthesubjectnewstoragetankandincludesplanninginformationforfuturephasesofthewaterutilitysystemexpansion.Theproposeddevelopmentwouldcreatestormwaterrunofffromthesitedevelopmentat3410NE12thfortheproposedwaterstoragetank,generatorshelter,fuelstoragetankandloadbank,andaccessroad.Theexistingimpervioussurfacecoverageofthe3410NE12thpropertyisapproximately33percent.Followingdevelopmentofthenewwatertankandassociatedimprovements,thepropertywouldhaveanapproximate69percentimpervioussurfacecoverage(Exhibit4,page7).Newimpervioussurfaceswouldbecollectedandconveyedtotheproposedon-sitestormwaterdetentionvaultsandthenbereleased(Exhibit12).Waterfromwithinthenew6.3gallonstoragetankwouldbereleasedaspartofmaintenanceandinemergencysituations.Thenewwastewater/sewerinterceptorpipeinNE12thswouldbeusedfordrainingwaterfromthenewwaterstoragetank(Exhibit4,page9).ThisuseoftheinterceptorisanticipatedtoERCReport15-000864 CityofRentonDepartmentofCommunity&ELifiomicDevelopmenttnvironmentalReviewCommitteeReportHIGHLANDSRESERVOIR&EMERGENCYGENERATORLUA15-000864,EDF,CU-H,SA-H,MODReportofianuary25,2015Page5of5occurfortwosituations,whenthewaterstoragetankisdrainedofwaterforinspectionandmaintenanceoftheinteriorofthenewtankandontherareoccasionthatwateroverflowsfromthenewtank.MitigationMeasures:Nofurthermitigationrequired.Nexus:Notapplicable.3.TransportationImpacts:ItisanticipatedthattemporaryimpactstotrafficwouldresultfromtheproposedprojectduringconstructionwithintheNE12thsright-of-waytoplaceundergroundpipes.ThiswouldresultintheclosureorpartialclosureofareasalongNE12ths,betweenEdmondsAveNEatthewestand3410NE12thStattheeast.Constructionworkwithinthestreetisanticipatedtooccuraspartofthesecondphaseofthesubjectproposal.Theexactscheduleisnotknownatthistimebutthesecondphaseofthesubjectproposalincludingright-of-wayworkisscheduledforbetweenMay2017andDecember2018(Exhibit9).WorkwouldoccurprimarilyMondaythroughFriday,withworkhoursbetween7:00AMand6:00PMandweekendworkonlyasapprovedbytheCity.Atrafficcontrolplanwouldberequiredduringconstructiontoensureemergencyaccesstoallpropertieswithexistingaccesslocatedonthestreetismaintainedthroughoutconstruction.Areaswithintheright-of-waythatareopenedtoplacenewandreplacementpipingincludingareanticipatedtoberestoredinkindaspartoftheproject.PublictransitagencycommentswereprovidedbyKingCountyMetroonJanuary12,2016.Metrorequestedthatthestreetfrontageimprovementsatthe3410NE12thspropertyincludepublictransitimprovements(Exhibit5).ThedesignofthestreetfrontageistoincludeanADAfrontdoorlandingpad,reardooralightingpads,andanewshelterfootingasapartofthisprojecttoensureadequatetransitaccessandsafety.TheCityofRentonprovidedaresponsetotheKingCountyMetroonJanuary12,2016andstatedthatthedesignofthestreetimprovementswouldoccurfollowingSEPAreviewphaseandthatKingCountyMetrowillbeincludedinthedesignphase(Exhibit6).MitigationMeasures:Nofurthermitigationrequired.Nexus:NotapplicableE.CommentsofReviewingDepartmentsTheproposalhasbeencirculatedtoCityDepartmentandDivisionReviewers.Whereapplicable,theircommentshavebeenincorporatedintothetextofthisreportand/or“AdvisoryNotestoApplicant”(Exhibit15).VCopiesofallReviewCommentsarecontainedintheOfficialFileandmaybeattachedtothisreport.TheEnvironmentalDeterminationdecisionwillbecomefinalifthedecisionisnotappealedwithinthe14-dayappealperiod(RCW43.21.C.075(3);WAC197-11-680).EnvironmentalDeterminationAppealProcess:Appealsoftheenvironmentaldeterminationmustbefiledinwritingtogetherwiththerequitedfeeto:HearingExaminer,CityofRenton,1055SouthGradyWay,Renton,WA98057,onorbefore5:00p.m.onFebruary12,2016.RMC4-8-110governsappealstotheHearingExaminerandadditionalinformationregardingtheappealprocessmaybeobtainedfromtheCityClerk’sOffice,RentonCityHall—7thFloor,(425)430-6510.ERCReport15-000864 m I-I I-I—1 1%) . Highlands Reservoir and Emergency Generator Replacement %OQOO•D 200 400 600 800 1000 1200 1.400 OCHIBIT3Zoning,JwR:14‘:1LR‘04RWi.>_____c,- . . .t;• -•CiekSR41‘.j_%‘R*’4Li1-—z[‘:R,L*F(v4“S40*kr&4cKnihti14A*ddleSchoølii—•—••R8a,zz-C‘ ..¶R4<I1ocv;3..I.pjj:j_,_._.Li:Z.,cva. .S.C0EUiR-IouenuK144ScpM%,SS:8SR8SI,.2R8:cvU. - - ,.S.—.5”:r.StU‘I2\cl...[.S .N..Rv%.t—r4%Li.z0INNotesNone114:S*SI80—I5120256512FeetWGS_1984_Web_Mercator_Auxiliary_SphereLegendCityandCountyBoundary•RMH-ResidentialManufacturedHomes“1OtherON-CommercialNeighborhoodt:iCityofRenton.CV-CenterVillageParcels.CA-CommercialArterialZoningSUC-UrbanCenter.RC-ResourceConservation•CD-CenterDowntownRi-Residentialidu/ac•COR-CommercialOffice/ResidentialR4-Residential4du/ac•CO-CommercialOfficeR6-Residential-6DU/ACIL-Industrial-LightR8-Residential8du/acIIIM-Industrial-MediumInformationTechnology-GISThismapisausergeneratedstaticoutputfromanInternetmappingciteandisforreferenceonlyDatalayersthatappearonthismapmayormaynotbeRentonMapSupportRentonwagovaccurate,current,orotherwisereliable1/19/2016THISMAPISNOTTOBEUSEDFORNAVIGATIONofJfljjf.Finance&ITDivision DEPARTMENTOFCOMMUNIEXHIBIT4ANDECONOMICDEVELOPM[LenlonS\’CKLISTPURPOSEOFCHECKLIST:Governmentalagenciesusethischecklisttohelpdeterminewhethertheenvironmentalimpactsofyourproposalaresignificant.Thisinformationisalsohelpfultodetermineifavailableavoidance,minimizationorcompensatorymitigationmeasureswilladdresstheprobablesignificantimpactsorifanenvironmentalimpactstatementwillbepreparedtofurtheranalyzetheproposal.INSTRUCTIONSFORAPPLICANTS:bjpjThisenvironmentalchecklistasksyoutodescribesomebasicinformationaboutyourproposal.Pleaseanswereachquestionaccuratelyandcarefully,tothebestofyourknowledge.Youmayneedtoconsultwithanagencyspecialistorprivateconsultantforsomequestions.Youmayuse“notapplicable”or“doesnotapply”onlywhenyoucanexplainwhyitdoesnotapplyandnotwhentheanswerisunknown.Youmayalsoattachorincorporatebyreferenceadditionalstudiesreports.CompleteandaccurateanswerstothesequestionsoftenavoiddelayswiththeSEPAprocessaswellaslaterinthedecision-makingprocess.Thechecklistquestionsapplytoallpartsofyourproposal,evenifyouplantodothemoveraperiodoftimeorondifferentparcelsofland.Attachanyadditionalinformationthatwillhelpdescribeyourproposaloritsenvironmentaleffects.Theagencytowhichyousubmitthischecklistmayaskyoutoexplainyouranswersorprovideadditionalinformationreasonablyrelatedtodeterminingiftheremaybesignificantadverseimpact.INSTRUCTIONSFORLEADAGENCIES:Additionalinformationmaybenecessarytoevaluatetheexistingenvironment,allinterrelatedaspectsoftheproposalandananalysisofadverseimpacts.Thechecklistisconsideredthefirstbutnotnecessarilytheonlysourceofinformationneededtomakeanadequatethresholddetermination.Onceathresholddeterminationismade,theleadagencyisresponsibleforthecompletenessandaccuracyofthechecklistandothersupportingdocuments.1H:\FiIeSys\WTR-DrinkingWaterUtility\WTR-13-Studies&ProjectDevelopment\WTR-13-0119-Highlands435ZoneReservoirReplacementPrelimDesign\SEPACUPMasterSite\envchlstHighlandsResRpl.docENVIRONMENTIPlanningDivision1055SouthGradyWay-Renton,WA98057Phone:425-430-7200Iwww.rentonwagov .EXHIBIT5KrisSorensenFrom:Kriedt,Gary<Gary.Krieducikingcourny.yuv—Sent:Tuesday,January12,20168:48AMTo:KrisSorensenCc:Korthals,David;PlansReviewSubject:KCMetroCommentsonLUA15-00064HiKris-KingCountyMetroTransitreviewedprojectLUAI5-00064,HighlandReservoir&EmergencyGeneratorReplacement,andwehavethefollowingcomments.Metrohasabusstop(#45130)instreetfrontageonthenorthsideofNE12thStreet.ThebusstophasapassengershelteronaconcretefootingandisservedbyRoutes105and240.Sincetheprojectproposesahalf-streetprofileconsistingofcurb,gutter,8-footplantingstrip,anda54ootsidewalk,werequesttheinclusionofanADAfrontdoorlandingpad,reardooralightingpads,andanewshelterfootingasapartofthisprojecttoensureadequatetransitaccessandsafety.DesigncoordinationshouldbethroughDavidKorthals,SouthDistrictFacilitiesPlanner.Davidisat206477-5776,fax:206-6844860,dayId.korthaR@kingcounty.gov.Pleasesendacopyofthemostrecentplans,includingtheproposedchannelizationwork,toDavidKorthalsandalsotopIansreview@kingcounty.gov.PleasecoordinatewithDavidKorthalsregardingalltransitrelatedissues.Thankyou!GaryKriedt,,SeniorEnvironmentalPlannerMetroTransit201SouthJacksonSL,MSh’SC-TRQ431saeuuaWA206<477.5.950or%O%J1&8%4%(cell)qary.kredt@Mnqcounty.qov1 EXHIBIT6KrisSorensenFrom:J.D.WilsonSent:Tuesday,January12,201610:34AMTo:‘david.korthals@kingcounty.gov’Cc:plansreview@kingcounty.gov’;‘gary.kriedt@kingcounty.gov’;KrisSorensen;VickiGrover;AbdoulGafour;ThomasH.Malphrus;KylePettibone-RH2Engineering(kpettibone@rh2.com);MarkMiller(mmiller@rh2.com)Subject:EW:KCMetroCommentsonLUA15-00064Attachments:11-A-SitePlan34x22.pdf;11-B-SiteX-Sections34x22.pdfHiDavid,SeeGaryKriedt’semailbelow.WewillbeginthedesignphaseofthisprojectaftertheSEPAreviewhasbeencompletedandwehavereceivedapprovalfortheconditionaluseofthesite.WewillkeepyouinthelooponthedesignofthestreetimprovementsincludingtherequestedADAfrontdoorlandingpad,reardooralightingpads,andanewshelterfootingasapartofthisprojecttoensureadequatetransitaccessandsafety’OurconsultantforthedesignoftheprojectisRH2EngineeringandtheirprojectmanagerisKylePettibone.Atthispointtheplansareverypreliminaryandthedetails,includingchannelizationhavenotbeendesigned..Attachedareapreliminarysiteplanandsitecrosssection.J.D.WHson,P.E.,WDMlVUtilityIGISEngineerDrinkingWaterUtilityUtilitySystemsDivisionPublicWorksDepartmentCityofRenton,WAjwilson@rentonwa.gov4%543O-7%95http://www.rentonwa.gov/0 TECHNICALINFORMATIONREPORTEXHIBIT74S(HIGHLANDS435PRESSUR.JNERESERVOIRSPreparedfor:CITYOFRENTON10555GradyWay5thFloorRenton,WA98055REN113.104.01.104Preparedby:RH2ENGINEERING,INC.November2015 EXHIBIT8.TECHNICALMemorandumIsCIE1,ISTSiIENGINEERSIIPLANNERSClient:CityofRentonProject:Highlands435PressureZoneReservoirsandEmergencyGeneratorProjectFile:REN113.10401.109ProjectManager:KylePettibone,P..Composedby:SteveNelson,L.HG.,L.E.G.Reviewedby:KylePetdbone,P.E.Subject:ReviewofExistingGeologic,Hydrogeologic,andGeotechnicalinformationDate:December19,2014FII(/;r-——;-::——1sev8811rJ:\EXPIRES:12/31/201412/19/1412/19/14BackgroundTheCityofRenton(City)intendstoconstructanewreservoironthesiteofitsexistingHighlandsReservoirsontheuplandseastofcentralRenton.Theexistingreservoirswereconstructedin1941and1960,respectively.Preliminarydesignsindicatethatthenewreservoirwouldstore6.3milliongallonsandwithdimensionsofapproximately170feetby250feetand25feethigh.A2009geotechnicalreportwascompletedbyZZA-Terracontoassessthesiteconditionsandrecommendfoundationdesignandconstructionapproachesforanewreservoirfoundedonthenativesubgradematerial.Thismemorandumreviewsthefindingsandrecommendationsofthegeotechnicalreportandprovidesasummaryofinfiltrationpotentialforpossibleon-sitestormwatermanagement.CityConditionalUsepermittingrequiressufficientgeotechnicalassessmentofthesitetosupportthedesignandconstructionoftheprojectandtoevaluatethepotentialeffectofconstructionandoperationongeologichazards.ThismemorandumincludesRH2Engineering,Inc.’s(RH2)reviewoftheexistinggeotechnicalreport(ZZA-Terracon,2009),andareviewofavailablegeologicmappingandboringlogs..12/19/20141:16PMJ\Data\REN\113-[04\09Permittmg\RENHigMineBackgroundGeoReviewMemo.docx ..‘zzA-1rerraccn81025801January19,2009HDREngineering,Inc.500l08thAvenueNEBellevue,Washington98004Attention:Mr.GregPiersonSubject:GeotechnicalReport*CityofRenton—WaterDistributionSystemStoragePlanningStudyRenton,WashingtonDearMr.Pierson,ThisreportpresentstheresultsofourgeotechnicalinvestigationfortheCityofRentonWaterDistributionSystemStorageStudy.Ourscopeofservicesincludedreviewofexistinginformation,sitereconnaissance,subsurfaceexploration,laboratorytesting,geotechnicalengineeringanalyses,evaluatingpotentialgeotechnicalconstraintsfortheproject,andpreparationofthisreport.TheseserviceswerecompletedinaccordancewiththeSubconsultantAgreementdatedOctober3,2008.WeunderstandthattheCityofRentonisplanningtoincreasethestoragecapacityofitswatersystemoverthenext4to7years.TheCityhasidentifiedtheHighlandsSiteandMountOlivetSiteastwoexistingreservoirlocationsthatcanaccommodatestorageexpansionformajorserviceareas.Weunderstandthatthescopeofthecurrentstudyislimitedtoaplanningleveleffort:Thegeotechnicalconclusionsandrecommendationspresentedinthisreportarethereforepreliminaryinnature.PROJECTDESCRIPTJONThelocationoftheFlighlandsSiteandexistingsitefeaturesareshownonFigure1,SiteandExplorationPlan.ThesiteiscurrentlyoccupiedbyI.5and2.0MGbelowgroundreservoirs,a750,000Gelevatedwatertank,andapumpstation,Ascurrentlyplanned,expansionoftheHighlandsSitewouldincludethefollowing.*.PhaseIconstructionofa210by265foot,8.0MGbelowgroundreservoirintheundevelopednorthernportionofthesite.Thisreservoirwouldhaveanoverflowelevationof445.5feetandafinishedfloorelevationof425feet.Thelatterelevationwouldplacethefinishedfloor1footaboveto7feetbelowtheexistinggroundsurface..Newpumpstationlocatedinthesouthernportionofthesitetothewestoftheexistingfacility.2190564thAvenueWestSteioo,Lynnwood,WA98043425-771-3304Fax:425-771-3549 .EXHIBIT9ConstructionMitigationDescriptionHighlandsReservoirandEmergencyGeneratorReplacementCityofRentonDrinkingWaterUtilityProposedConstructionDatesandTimesPart1,ReplaceEmergencyGeneratorAnticipatedconstructiondates:Start1May2016andend31December2016Workinghours:seebelowPart2,Constructreplacementreservoir,on-siteandoffsiteutilitiesandstreetfrontageimprovementsAnticipatedconstructiondates:Start1May2017andend31December2018Workinghours:seebelowWorkinghours:Typicallytheworkinghourswillbebetween7:00am.and6:00p.m.,MondaythroughFriday.Exceptionstothismayoccurinordertominimizedisruptionstolocaltraffic.InthosecasestheschedulingwillbehandledaspertheCityofRentonstandardspecificationswhichareasfollows:ExceptinthecaseofemergencyorunlessotherwiseapprovedbytheContractingAgency,thenormalstraighttimeworkinghoursfortheContractshallbeanyconsecutive8-hourperiodbetween7:00a.m.and6:00p.m.ofaworkingdaywithamaximum1-hourlunchbreakanda5-dayWorkweek.Thenormalstraighttime8-hourworkingperiodfortheContractshallbeestablishedatthepreconstructionconferenceorpriortotheContractorcommencingtheWork.IfaContractordesirestoperformWorkonholidays,Saturdays,Sundays,orbefore7:00a.m.orafter6:00p.m.onanyday,theContractorshallapplyinwritingtotheEngineerforpermissiontoWorksuchtimes.PermissiontoWorklongerthanan8-hourperiodbetween7:00a.m.an6:00p.m.isnotrequired.SuchrequestsshallbesubmittedtotheEngineernolaterthannoonontheworkingdaypriortothedayforwhichtheContractorisrequestingpermissiontoWork.PermissiontoWorkbetweenthehoursof10:00p.m.and7:00a.m.duringweekdaysandbetweenthehoursof10:00p.m.and7:00am.onweekendsorholidaysmayalsobesubjecttonoisecontrolrequirements.ApprovaltocontinueWorkduringthesehoursmayberevokedatanytimetheContractorexceedstheContractingAgency’snoisecontrolregulationsorcomplaintsarereceivedfromthepublicoradjoiningpropertyownersregardingthenoisefromtheContractor’soperations.TheContractorshallhavenoclaimfordamagesordelaysshouldsuchpermissionberevokedforthesereasons.PermissiontoWorkSaturdays,Sundays,holidaysorotherthantheagreeduponnormalstraighttimeworkinghoursMondaythroughFridaymaybegivensubjecttocertainotherconditionssetforthbytheContractingAgencyortheEngineer.Theseconditionsmayincludebutarenotlimitedto:requiringthe .EngineerorsuchassistantsastheEngineermaydeemnecessarytobepresentduringtheWork;requiringtheContractortoreimbursetheContractingAgencyforthecostofengineeringsalariespaidContractingAgencyemployeeswhoworkedduringsuchtimes;consideringtheWorkperformedonSaturdays,Sundays,andholidaysasworkingdayswithregardstotheContractTime;andconsideringmultipleWorkshiftsasmultipleworkingdayswithrespecttoContractTimeeventhoughthemultipleshiftsoccurinasingle24-hourperiod.Assistantsmayinclude,butarenotlimitedto,surveycrews;personnelfromthematerialtestinglabs;inspectors;andotherContractingAgencyemployeeswhenintheopinionoftheEngineersuchWorknecessitatestheirpresence.ConstructionMitigationMeasures&BestPractices:AllactivitieswillbeginwiththeimplementationandinstallationofBestManagementPractices(BMP).Thesepracticesinclude:ProposedHauling!TransportationroutesContractorswillapplyfortheirownhaulingpermitsrelatedtothisprojectandwillfollowacityapprovedroute.ItisanticipatedthatthehaulroutewillbefromthereservoirsitewestalongNE12thtoNESunsetBlvdandthensouthandwestto-405.StormWaterConstructionwillstartwiththeimplementationandinstallationofBestManagementPractices(BMP)forTemporaryErosionandSedimentationControl(TESC).Allstormwaterdraininletsinandaroundtheproposedconstructionoperationsandstagingareaswillbesurroundedbyoilabsorbentpaddingtomitigatethepotentialofanyhydraulic/fuelleakagesemanatingfromconstructionmachineryenteringthewatershed.DustControlThroughtheentireconstructionperiodtheContractorshalltakeallnecessarystepstodustcontrolallworkingareaandunpavedroads.Theuseofcalciumchlorideorotherchemicalswillnotbepermittedfordustcontrol.TheContractorwillaccomplishdustcontrolbywateringandsprinklingtosatisfactorilysettlethedust.Contractorshallcomplywithanyrequirementsimposedbylawtopreventfugitivedustemissions.Alldemolishedmaterialsanddebriswillbestockpiledonsitetopreventdustandsedimentationfrommigratingontoroadways.Contractorvehiclesthataretransportingmaterialstoandfromthesitewillberequiredtohavetireswashedpriortoleavingthesite.Thiswillpreventdustandsedimentationfromenteringnearbyroadways.SpecialHoursofOperationNoneproposedatthistime.PreliminaryTrafficControlPlanNoneproposedatthistime.Part1willnotneedatrafficcontrolplan.Part2willneed(a)trafficcontrolplan(s)fortheworkintheright-of-way.Thecontractor(s)willberesponsibleforsubmitting,gettingapprovalofandimplementingtrafficcontrolplans. •1wT2!EXHIBIT10%plopes[S.SI.SS•z—-sf—.—I..IIIIIIIIIIII—I.te—.SWII*ItIIIII•itIIIIIWII#IIII•IIPSPIISIII*I..1ISIPIP,S//NotesLegendNone0CityandCountyBoundaryiiOtherriCityofRenton5120256wGs_1984_Web_Mercator_Auxiliary_Sphere512FeetParcelsSlopeCityofRenton>15%&<=25%>25%&<=40%(Sensitive)>40%&<=90%(Protected).>90%(Protected).1—InformationTechnology-GISThismapisausergeneratedstaticoutputfromanInternetmappingsiteandCityof(,-)isforreferenceonly.DatalayersthatappearonthismapmayormaynotbeRentonMapSupportRentonwa.govaccurate,current,orotherwisereliableFinance&ITDivision1/19/2016THISMAPISNOTTOBEUSEDFORNAVIGATION CityofRehlonWelihead Protec’IonZone2EXHIBIT11NotesLegendNoneCityandCountyBoundary1Othert:iCityofRentonO[:JParcelsWellheadProtectionAreaZonesLiZone1IZone1Modified—I51202565l2FeetIZone2WGS_1984_Web_Mercator_Auxiliary_Sphere.---——- --—InformationTechnology-GISThismapisausergeneratedstaticoutputfromanInternetmappingsiteandCityofisforreferenceonly.Datalayersthatappearonthismapmayormaynotbe—-—is&)RentonMapSupportRentonwa.govaccurate,current,orothenaisereliableFinance&ITDivision1/19/2016THISMAPISNOTTOBEUSEDFORNAVIGATION ;:EXHIBIT12•;:.-,.-- - .(snncuw:c‘ff-‘-_‘.—‘%%_s__.. ._••- . “ . . . . .,LZ%4-:j:J:iw3z:;(Ir;-:ww--r=_r=4j{:L__&j$twI%rrFI(-Lf-,?-,7C-II—-t:as;;/:npc4Q!—-Iht<%.*rtF14,.‘C_/*4sN—(::F“---I‘:-_jic,)‘,.y!nt:•,/. ‘;. .0IIa\.:.‘ . . ... . . ...,;‘C).:jt:• :. .• .‘TI—————--——.-——-———————*—_*Jk0I—..—..zIs=,‘ . . .—..I+;.Ji?:tt::;*:::!ri:!r——-..{$“$b‘NII&Ejn;:n.:9Ct?$(:•iI-tiE;f_}I__\\...:•SFct4CI—-7z::ri:;<VACITYOFRENTON...... . , _______—==————————--.____.-“...1----—--—-——————I¶t(#t)b01jFt:——————*%.——s—-—I—-r--—r—i-———-—£ARTH?$ZA&*MAR‘5\fl.ETRMSIR:tFWNF.AAEFI4aT_k1(tft1t‘1%ACL&&WA**flrtI:.!tkeYtRIts.Q.MRi••_____.‘.:...••%III4IjII5’j;1i.5‘‘‘.““‘.<‘;,,I-\‘\1aIiI—t1__LI__-j______-“--“r—{_—w45’:.‘,—————-————_——j-z‘—:3—I4tvtaa1Ilv,!5%/——-—=‘:%3,-IL(0\J1N!%!S:F‘:•‘-““/n.:t0Ftewill::=:_L-4IraTW:hfrRtJfj1%,#i\I:1::tt1—1‘*I1trcc4%‘Anoorcna.‘I‘?..5’I‘•:k\R;45ttAroB:PcG5%5’JPt‘.‘‘EA6UAL—?J5.ijtkMrUa“\&cRt4flJF*i1r&a1wtIMI“.--t‘IF0¶:,Lj(11)Wfl4—————‘——‘:rt—Ju’t————————————*S‘‘‘-WF)t.W•.\*-PRODGRADIPLANiz :%.4c’SS2w:r;t’St)_jsZr%ewof-Qu.—,;:0::.;flIw0na.s:QiiVw.%T.j.1/‘:jJ./1FFCC2J.k:::41:14S2UiP14c/1TO%1PUZ1IflGM4%4:F4SEi*eV1.%t4.*4.,%::.J11-II-I-II-IrxLU..fl$Th..:S%YWS..::S.(:X41jS1C;R4ft1....—.—....FIGURE2-14:kNE12THSTThANSM.kONM4W.RELACEMENTANp.O-s!TUTUTg ADVISORYNOTESTOAPPLflEXHIBIT15•.iityofLUAI5-000864. . .ApplicationDate:December14,2015iieAddress:3410NE12thStName:HighlandsReservoirandEmergencyGeneratorRenton,WA98056-3428ReplacementPLAN-PlanningReview-LandUseVersion1IJanuary21,2016EngIneeringReviewCommentst:VickiGroverI425-430-7291tvgrover@rentonwagovRecommendations:MEM0RANDUMDATE:January21,2016TO:KrisSorenson,PlannerFROM:VickGrover,PlanReviewSUBJECT:Utility&TransportationCommentsforCOPHighlands435ZoneReservoir3410—NE12thStreetLUA15000864Ihavecompletedareviewfortheabovereferencedproposallocatedatparcel0423059186.WATER1.TheproposeddevelopmentiswithinCityofRentonWaterDistrict.SANITARYSEWER1.SewerserviceisprovidedbytheCityofRenton.Thefuturephasewillrequireacutandcapoftheexistingsidesewerconnectionforthechlorinationbuildingandvault.SURFACEWATER2.Adrainagereportcomplyingwiththe2009KingCountySurfaceWaterDesignManualandCityofRentonAmendmentstotheKCSWDM,wassubmittedfromRH2Engineering,Inc.datedNovember2015.BasedontheCity’sflowcontrolmap,thissitefallswithintheFlowControlDurationStandard,ForestedSiteConditions(northandeastsidesofthesite;HoneyCreekBasin)andthePeakRateFlowControlStandard,existingsiteconditions(southandwestsidesofthesite;JohnsCreekBasin).AFullDrainageReviewwasincludedinthereportandisforconstructionofthePhase1reservoirandplanningforthestormwatersystemexpansioninPhase2.AflowcontrolBMPisrequired;theTIRproposespermeablesubgradewithtraditionalasphaltoverthetopandcallit“PermeableAsphalt”.ThegeotechreportsaysthesoilisnotsuitableforinfiltrationsoadifferentBMPneedstobeproposed.Theprojectwillneedtosubmitanadjustmentforapprovalofthepumpsystem.Thefinaldrainageplananddrainagereportmustbesubmittedwiththeutilityconstructionpermitapplication.3.Ageotechnicalreportfrom2009authoredbyZZATerraconwassubmittedwithaDecember2014TechnicalMemorandumtothe2009geotechreport.RH2reviewedZZATerracon‘5findingsandrecommendationsaswellasprovidedasummaryregardinginfiltrationpotentialforonsitestormwatermanagement.RH2classifiedthesoilconditionsonsitetohavealowinfiltrationcapacityandthereforeisnotsuitableforonsiteinfiltrationofstormwater.Theearthworkportionoftheprojectisrecommendedtobeaccomplishedduringextendeddryperiodsofweather;ifearthworkisdoneduringthewestseasonextraprecautionarymeasureswillneedtobetakentoprotectsubgradematerials.Allgeotechnicalrecommendationsshallbeincorporatedintothedesignplans.4.AstudyshallberequiredandincludedintheTIRtoverifydownstreamcapacityfortheoverflowfromthereservoirsandprovetheflowswillhavenoenvironmentalimpacts.5.Surfacewatersystemdevelopmentfee(SDC)willbeapplicable.ThecurrentrateofSDCfee$0594persquarefootofnewimpervioussurlacearea,butnotlessthan$1,350.00.6.AConstructionStormwaterGeneralPermitfromDepartmentofEcologywillberequiredifgradingandclearingofthesiteexceedsoneacre.AStormwaterPollutionPreventionPlan(SWPPP)isrequiredforthissite.TRANSPORTATION/STREET1.Transportationimpactfeeswillapplytothisproject.Theactualratewillbeassessedatalaterdate.ThisfeewillbebasedontheRan:January25,2016Page1of3 ADVISORYNOTESTOAPPLfl\NT•... ....• .• • . . •. . .*CityofLUAI5-0008641(,. .L,i.!PLAN-PlanningReview-LandUseVersion1IJanuary21,2016EngineeringReviewCommentsêntact:VickiGrover425430-7291Cvgrover@rentonwagovamountofbuildingareaanditsuseperthelIEManual.Paymentofthetransportationimpactfeeisdueatthetimeofissuanceofthebuildingpermit.2.RoadClassification—MinorArterial/North12thStreet.Existingrightofwaywidth—approximately60ft.onNorth12thStreetwith2travellanes..RequiredROWwidthBasedonRMC46060,North12thSt.requires91ft..ROWdedicationneeded—Approximately15.50feetonthenorthsideofNorth12thStreet..11ft.travellanes,a5ft.bikelane,0.5ft.curbandgutter,8ft.sidewalkand8ft.planterstripswillberequired.TheapplicanthassubmittedamodificationforRightOfWayDedicationandstreetfrontageimprovements,whichiscurrentlyunderreviewandstaffisrecommendedapproval.3.MetroBusrequirementsfortheexistingbusstoplocatedinfrontofthesitewillrequire:MetroBusStop#45130MetrorequeststheinclusionofanADAfrontdoorlandingpad,readdoorlightingpadsandanewshelterfootingtoensureadequatetransitaccessandsafety.4.PavingandtrenchrestorationwillcomplywiththeCity’sTrenchRestorationandOverlayRequirements.GeneralComments1.Allconstructionorserviceutilitypermitsfordrainageandstreetimprovementswillrequireseparateplansubmittals.AllutilityplansshallconformtotheRentonDraftingStandards.PlansshallbepreparedbyalicensedCivilEngineer.2.Whenutilityplansarecomplete,pleasesubmitfour(4)copiesofthedrawings,two(2)copiesofthedrainagereport,permitapplication,anitemizedcostofconstructionestimate,andapplicationfeeatthecounteronthesixthfloor.FirRILw-BuildingCommentsèontactCoreyThomasr4%5-4307024tcif4s@rentonwagovRecommendations:CodeRelatedComments:1.Separateplansandpermitsfortherelocation/replacementoftheemergencyelectricalgeneratorifithasanassociatedfuelstoragetank.. .. .‘.. . . . . , ,..CommunityServicesReviewCommentsContactLeslieBetlachf4254306619]LBetlach@renfonwagovRecommendations:1.Streettrees—overheadelectricwiresexist,thereforeuseonlysmallmaturingstreettreesspaceat30ftoncenter(planshows20feetoncenterspacing).Notreecloserthan30feetfromstreetlightpole.UseonlyAmelanchierlaevis“SpringFlurry”—Serviceberry—2inchcaliper2.Plantingstripalongstreet—shallbemaintainedbytheWaterUtilityexceptstreettreesmaintainedbyCity.3.Amelanchierlaevis“SpringFlurry”—ServiceberryMinimumcalipershallbe2inchesSingletrunkwithawelldevelopedcentralleaderSpecimengradeonlyDonotusebirchassuggestedonplanPlnniigReviewCommentsContactSorensenI425-4306593Iksorensen@rentonwagovRecommendations:Planning:1.RMCsection44030.C.2limitshaulhoursbetween8:30amto3:30pm,MondaythroughFridayunlessotherwiseapprovedbytheDevelopmentServicesDivision.2.Commercial,multifamily,newsinglefamilyandothernonresidentialconstructionactivitiesshallberestrictedtothehoursbetweenseveno’clock(7:00)am.andeighto’clock(8:00)p.m.,MondaythroughFriday.WorkonSaturdaysshallberestrictedtothehoursbetweennineo’clock(9:00)am.andeighto’clock(8:00)p.m.NoworkshallbepermittedonSundays.3.Withinthirty(30)daysofcompletionofgradingwork,theapplicantshallhydroseedorplantanappropriategroundcoveroveranyportionofthesitethatisgradedorclearedofvegetationandwherenofurtherconstructionworkwilloccurwithinninety(90)days.Alternativemeasuressuchasmulch,sodding,orplasticcoveringasspecifiedinthecurrentKingCountySurfaceWaterManagementDesignManualasadoptedbytheCityofRentonmaybeproposedbetweenthedatesofNovember1standMarch31stofeachyear.TheDevelopmentServicesDivision’sapprovalofthisworkisrequiredpriortofinalinspectionandapprovalofthepermit.Ran:January25,2016Page2of3 ADVISORYNOTESTOAPPL(flNT•.:...:s:..:.:... .•LUAI5-000864Cityof.:. .PLAN-PlanningReview-LandUseVersion1IJanuary21,2016PlanningReviewCommentsContact:KfiSSorensenI425-430-6593Iksorensen@rentonwa.gov4.ANationalPermitDischargeEliminationSystem(NPDES)permitisrequiredwhenmorethanoneacreisbeingcleared.5.Theapplicantmaynotfill,excavate,stackorstoreanyequipment,disposeofanymaterials,suppliesorfluids,operateanyequipment,installimpervioussurfaces,orcompacttheearthinanywaywithintheareadefinedbythedriplineofanytreetoberetained.6.Theapplicantshallerectandmaintainsixfoot(6’)highchainlinktemporaryconstructionfencingaroundthedriplinesofallretainedtrees,oralongtheperimeterofastandofretainedtrees.Placardsshallbeplacedonfencingeveryfiftyfeet(50’)indicatingthewords,“NOTRESPASSING—ProtectedTrees”oroneachsideofthefencingiflessthanfiftyfeet(50’).Siteaccesstoindividuallyprotectedtreesorgroupsoftreesshallbefencedandsigned.Individualtreesshallbefencedonfour(4)sides.Inaddition,theapplicantshallprovidesupervisionwheneverequipmentortrucksaremovingneartrees.7.TheapplicantshallprovideafillsourcestatementforfillusedforprojectdevelopmentatthereservoirsiteandwithintheNE12thStrightofwaywithintheWellheadProtectionArea.Thefillsourcestatementshallbesubmittedwiththeconstructionpermitapplication.Ran:January25,2016Page3of3