EXH1109041825

PCHBPollution Control Hearings Board of the State of Washington

• Port's Joint AClUaUCResourceProte,:*_mAppllo_an (JI_PA), it is our undemtancling1Me the wMIondsneartheAirportdo natserve unk_ ecologicalInctiens. As notedon p_e 2-13 of that plan: Manyof the wetlands_ wouldbe impadc'dby _e_ Maim' Plan imi_rv-vements m small (0.6 sore):isolatedfrom othersignific_ _l_ltJOor sem[-_ju_c Imbit_ end occur ina landscapen'agmentedbystreets,corer uctai,msklentlalof alq_ development. The w_Jandsgenerallyconte;nfew atldbutesI_ ralvelyassociatedwitheach funcgonel pedmmanr,e. Theorem, for m_'t funclions,the etlandswerenottensed=redtO havean ecologicalfunotlon. Propon_ of on-sitemitigationhavearousalthat. becat _ urb_oizatlonhis al_mdyd_cl ordegradedmuchof theweUsndsIn_e MlllerenoDesMol ,screek basins,any mmeinillgwgllsnas ere "unique:However,in aoco_ence w_lhyourguide e, )t appearsthat the deli_eMJonend eheractedzMionofwetlandsisbes_ uponobjectivec,-,_ i. ThePortevaluatedthe uniquenessof we_an_ near_heAt11_ol_baseduponst_h objectiveeG oOlcelcriteria,indudi0gvdldllfeand hab_¢ floodstom_p,groundwaterex'd_e, andwaler_ _elily.SeeTables2.2-3_ 2.2-4of WetlandkT4lgationPlen (Oecember,1g£;_),c_pyatta_l [o the Po_t'sJARPA. Tile ev_ustlon rated_e blologlc_landphys_alfun_ns oftheImpactedJ_landsas10wto muderate.SeeNehral ResourceM/#gat_nP/an, Ma,_terF_an_ FE/I, AppenolXP (Table3.2-3). We do not believethattherehasbeen_ly ob)ecUvedemonsiraU()n_ the Port'sconduslonsam Ina_ or thotthesewetlandsserv9a uniquefunctionthatwan,a_ s_l]ngmltioet_n0wetlandsWithint0,000 feet of the mnw_, parliculadygh,_ _e pe4enl_l_ th_ su_ wetlandswouldposeto flight operauons, dl III ThlSCofleJuMoniSalmldy embodiedin leourJuly3, 199"/', ec_ndofDe_slon('ROD') onthe Mad'tar PlanImprovementsF/nat_;u_emental _nvimnmentall_;t 51atementQ=SEIG).The ROD I_ theconcUtlonsthatam "heCUba.ryin al10'erto provideF_d" fortheairportimproven_ntsand concludesthat themis "noI_Cticable altemetive"to clt'-_itemitkj_ion. The ROD providesaS fOllOWS" ARhoughitisgenerallyInferable to elternptto mIgete wetlandlossUlmughreplace wetlandsin1hesamewatershed[a goalrMlecte_nthe localregulaUons_lScussed AppendixF, page127],thi_is riotlha casewhe_eh replacementWouldcreatemanmade w_le_dssdjaceMto airporteinmaRmovement_rl_. Includedattheendof F_EtS _:tlon 5-5 is.a ,z_dntof FAA AdvisoryC,lrc01_r150/52_1-33,date May t, 1997,whichstingsthe ' "" .FAAs strongoppoMHonto w_landmitigMionprcIP_ locatedwltNn_0,000feet of airports servinglurbin_ olml_ _ a_dlea-TaI, dueto thesafeb/hazard_ w_,Alands• presentel;a_z'_ctanlsofwlldllfe,_I_ siOMflca_ increaeesthed_ltof_el_ strike. |1 The,RODconcludesKr,discussionof off-_'temi_atlon mrexplainingthorelMionshlpbetweenme FAAs proJect-specifioclee4sionat _a-Tao e_! thepolicilarticUlatedInAG1_0/5290-33.I Tltls_ agencypol_l determination(p,bg_l_n of AC 150/5200-33|supportsthe PEI8 an4 I=SEi$ determ;_,_,tionsthat the replaoemel watland,Jfor the Sea.Ta(1MasterPlan UlxJat_development_c_onsshouldnotbe _oc_ m the vlc_nRyof the _irl_t. Given the I;mltedland area In the ,Se_Tac watershedI wetlandreplacement,end the hazard assedatedwithShecreationof,,_dlifeattra_omIiwfthin10,000feetof…
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