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lK ttitas— Ounty <br />Bowers Recd Airport <br />Envirohmer>ital Aissessmieht for lA sport dlht. arvrrements. <br />Advanced Desiegr Justif ce# on Memo <br />Task Order #1 <br />Scope of work <br />°xt"bo �fK 201.E i <br />Bowers FieldAlrport (kELN or "the Airport"] it.t whed artd'dOmtOd'bV K ttites CQuhty (:County or",the <br />Gwoor"), acid is located.near EHen,$.bur&VashJhktOn. The Airport serves general aviation (GA);,user5, <br />and does not haste:scf edwle eorttmerdA.I airline ervice. The Airport is classified as a 6A airport by <br />the Federal&Wtion Akiministratroh j:FAAj National Pian of integrated Airport 8Vstems (HPI ), <br />The. Airport ES located'oorth of U.S..,Route 9t1 and nortb of VlenOurg's ky tenter; in Kittitas County,: <br />Washington. The Airport has an elevation of 1,763 f emt above mean sea level (1VI.$0. <br />BACKGROUND <br />An envirbnimentalassettrnerit i,s under Wrary perthe pr-00tas scope ofw6rk°and contract dated.August <br />7,2018. Theprojects-i.ncludedirr the Proposed Action 'were 4efirted:int.h nir:nlrlenta,nt, <br />Rurposi ::OM Meed dacurnerat,: approved by the FAA on duly 31, 2019. The. Wfiold flopd .rnttiga:tlon <br />cinder project 2 s:based on'histor`tcal seasonal flooding experienced on the.airport; The proposed <br />airport imprc verinent .Veins are si inMwized in Table 1 as fo IMS.'. <br />'cable`i. `5urrmaryr of Prosed Action <br />praiect ! De!seriptlim <br />Full-length parallel taxiway(newJ, mor#ification.of-ex-MinB;Tax Way F,.,and <br />iions'ttoction:bf additional airfield taxiways (taxiwayconnecfions to fuure <br />Runways 7»2:5. ends): based on ARC B-II.startdar*- i rolect w71 includad . roir%ge <br />2 Runways 11/29 Rehabilitation <br />Rehabilitate existirtg;.rurtwalr foto et ARC B.11 cleSi rl :Star dards 'tminate <br />existing aligned taxiway at Runway. 29 end. Prgject:will Ind ude.drainaae <br />Improvements r»er is compatible with fla d.rriitigatiosi improvements in: Project 02: <br />Airfield Flood Mitlptkm <br />lmpmv#raents to allevike occU mente of traeaiixed flooding t Cr Runway 1 . <br />and In other areas of Airport whilei :not: Increasing; fk►od exposure. da+uvrts ream <br />Of the airport: <br />r ongruct hao r taxi ,lane s for fctt; re hanger 004efa gbiith.of the main <br />aprons. Pr:.pjeCt will include drainage 1.mprovernents: compatlble, with (food <br />mitikOtidri inrrprovernpas ;in:IMM ect. ##2.. <br />Oowef5 Field At pgrdoproieemp*EA <br />�dv�arued r�es�{a,lu�trfica4�.hderan <br />touter 2$ �if1�J�;r2 <br />