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UN+ %y 0( 1 1u. 0c^ w@4Rfu mw 0.w 1RUHHP DeskJet 690C Series Printer0,,,,00(9 Z6Times New Roman RegularX($ }CEKQW]cioAutoList1A.1.A.A.A.A.A.A.##37=CIQYag1.a.i.(1)(a)(i)1)a)(;3$2#  0  .3  0  ~'  EEeV&3|xU(O;$0  2#  a  .3  0` (#(#(EhCEKQW]cioAutoList21.1.1.1.1.1.1.1. floodwayUncontainedbuildable$bAAZ0Arial Narrow Regular !  _XX'   FLOODPLAINPRESERVATIONMANAGEMENT#XZOX'0#XXZO PortlandMetro    GrowthManagementServices(503)7971839#XZOX##X}XXXZOO#  ` _  _@" FloodManagement   L } #L 3   -,X,` XX-3j2}  A  .3  0    Thepurposeofthesestandardsistoreducetheriskofflooding,preventorreducerisktohuman  lifeandproperty,andmaintainthefunctionsandvaluesoffloodplains,suchasallowingforthestorageandconveyanceofstreamflowsthroughexistingandnaturalfloodconveyancesystems.3j݌ (#(# Ќ   3   32}  B  .3  0    ThisordinanceestablishesaFloodManagementAreaOverlayZone,whichisdelineatedonthe 8  WaterQualityandFloodManagementAreaMapattachedandincorporatedbyreferenceasapartofthisordinance.3݌ (#(# Ќ   3   3+2}  C  .3  0    TheFloodManagementAreasmappedinclude:3+V݌ 8 (#(# Ќ   ;   ;0  2}  1  .3  0(#(#  Landcontainedwithinthe100yearfloodplain,floodareaandfloodwayasshownonthe   FederalEmergencyManagementAgencyFloodInsurancemapsandtheareaofinundationfortheFebruary1996flood;and;H݌ (#(# Ќ   ;   ;0  2}  2  .3  0(#(#  Landsthathavephysicalordocumentedevidenceoffloodingwithinrecordedhistory. p Jurisdictionsshallusethemostrecentandtechnicallyaccurateinformationavailabletodeterminethehistoricalfloodarea,suchastheaerialphotographsofthe1996floodinganddigitizedfloodelevationmaps.;݌ (#(# Ќ   ;   ; 0  2}  3  .3  0(#(#  ThestandardsthatapplytotheFloodManagementAreasapplyinadditiontolocal,stateor  \ federalrestrictionsgoverningfloodplainsorfloodhazardareas.;  ݌ (#(# Ќ   3   3i 2}  D  .3  0    UsesPermittedOutright:3i ݌ (#(# Ќ   ;   ;I 0  2}  1  .3  0(#(#  Excavationandfillrequiredtoplantanynewtreesorvegetation.;I t ݌(#(# Ќ   ;   ;g0  2}  2  .3  0(#(#  Restorationorenhancementoffloodplains,riparianareas,wetland,uplandandstreamsthat  meetfederalandstatestandards.;g݌ (#(# Ќ   3   32}  E  .3  0    ConditionalUses:3݌D!(#(# Ќ  ̀0  AllusesallowedinthebasezoneorexistingfloodhazardoverlayzoneareallowedintheFlood #l! ManagementOverlayZonesubjecttocompliancewiththeDevelopmentStandardsofsubsectionGH. (#(#  3   32}  F  .3  0    ProhibitedUses:3݌&"%(#(# Ќ    1.Anyuseprohibitedinthebasezoneorexistingfloodhazardoverlayzone. ;   ;0  2}  2  .3  0(#(#  UncontainedareasofhazardousmaterialsasdefinedbytheDepartmentofEnvironmental |*%) Quality.;1݌ (#(# Ќ   @-(,  3   32}  G  .3  0    DevelopmentStandards3݌(#(# Ќ    Alldevelopment,excavationandfillinthefloodplainshallconformtothefollowingbalanced  cutandfillstandards: ;   ;\0  2}  1  .3  0(#(#  Nonetfillinanyfloodplainisallowed.Allfillplacedinafloodplainshallbebalanced 8  withatleastanequalamountofsoilmaterialremoval.;\݌ (#(# Ќ   ;   ;0  2}  2  .3  0(#(#  Excavationareasshallnotexceedfillareasbymorethan50percentofthesquarefootage.;݌ L (#(# Ќ   ;   ;0  2}  3  .3  0(#(#  Anyexcavationbelowbankfulbankfullstageshallnotcounttowardcompensatingforfill.;:݌$ (#(# Ќ  ̀0  0(#(#(Note:Theseareaswouldbefullofwaterinthewinterandnotavailabletohold   stormwater.) (#(#  ;   ;0  2}  4  .3  0(#(#  Excavationtobalanceafillshallbelocatedonthesameparcelasthefillunlessitisnot p reasonableorpracticabletodoso.Insuchcases,theexcavationshallbelocatedinthesamedrainagebasinandascloseaspossibletothefillsite,solongastheproposedexcavationandfillwillnotincreasefloodimpactsforsurroundingpropertiesasdeterminedthroughhydrologicandhydraulicanalysis.;;݌ (#(# Ќ   ;   ;0  2}  5  .3  0(#(#  Forexcavatedareasidentifiedbythecityorcountytoremaindryinthesummer,suchas H parksormowedareas,thelowestelevationoftheexcavatedareashallbeatleast6inchesabovethewinter lowwaterelevation,andslopedataminimumoftwopercenttowardstheProtectedWaterFeature.Onepercentslopeswillbeallowedinsmallerareas.;݌ (#(# Ќ   ;   ;0  2}  6  .3  0(#(#  Forexcavatedareasidentifiedbythecityorcountytoremainwetinthesummer,suchas  aconstructedwetland,thegradeshallbedesignednottodrainintotheProtectedWaterFeature.;݌ (#(# Ќ   ;   ;0  2}  7  .3  0(#(#  Minimumfinishedfloorelevationsmustbeatleastonefootabovethedesignfloodheight D! orhighestfloodofrecord,whicheverishigher,fornewhabitablestructuresintheFloodArea.;݌ (#(# Ќ   ;   ;!!0  2}  8  .3  0(#(#  Shorttermparkinginthefloodplainmaybelocatedatanelevationofnomorethanone $D # footbelowthetenyearfloodplainsolongastheparkingfacilitiesdonotoccurinaWaterQualityResourceArea.Longtermparkinginthefloodplainmaybelocatedatanelevationofnomorethanonefootbelowthe100yearfloodplainsolongastheparkingfacilitiesdonotoccurinaWaterQualityResourceArea.;!!L!݌ (#(# Ќ  <,X,S` X,X,` X< ;   ;#0  2}  9  .3  0(#(#  Temporaryfillspermittedduringconstructionshallberemoved.;#$݌|*%)(#(# Ќ   @-(, Ї̀10.0  Newculverts,streamcrossingsandtransportationprojectsshallbedesignedasbalanced(#(# Ѐ0  0(#(#cutandfillprojectsordesignednottosignificantlyraisethedesignfloodelevation.Such  projectsshallbedesignedtominimizetheareaoffillinFloodManagementAreasandtominimizeerosivevelocities.Streamcrossingsshallbeasclosetoperpendiculartothestreamaspracticable.Bridgesshallbeusedinsteadofculvertswhereverpracticable. (#(#   L Eh( L 3   ݀3'2Eh  11  .3  0    Excavationandfillrequiredfortheconstructionof  ete  detentionfacilitiesorstructures,and $ t ohttherfacilities,suchaslevees,specificallyshallbedesignedtoreduceormitigatefloodimpactsandimprovewaterquality.Leeveesshallnotbeusedtocreatevacantbuildablelands  n  t  i  o  n    fa    c  .3''݌ (#(# Ќ