EXH1273051004

Northwest Mount=in Region 1601 Lind Avenue. S. W. U.S. Department _. _=ho.Mont=m R=me,W==M_eeeS0S_-40_ of Transportation o_wee.Ut=h,W=shn_ton, Federal Aviation wyom_ Administration August 9, 2001 Colonel Ralph Graves, P.E. District Engines" U.S. Army Corps of Engineers SeattleDistrict Office P.O.Box 3755 Seattle,WA 98124-3766 DearColonelGraves: Thisisourfinalfollow-uplettertoyouprovidinginformationaddressingtheissues raisedinourMay 22_ meetingandyourApril30_ Memorandum forRecord.We apologizeforthedelayincompletingourreviewandgettingourresponsestoyou; however,we believethattheissuesneededtoI_thoroughlyaddressedgiventhe significanceofSeattle-TacomaInternationalAirport'sthirdrunwayprojecttotheregion. Inthecourseofourreviewwe decidedwe shouldvalidatethedataandanalyses containedm theFinalEnvironmentalImpactStatement(FEIS)andFinalSupplemental EnvironmentalImpactStatement(SEIS),throughthepreparationofa written environmentalre-evaluation.Thisprocesshasnow beencompletedinaccordancewith ourprescribedprocedures.As aresult,we haveconcludedthattheprojectcontinuesto conformtotheanalysispresentedintheFEIS/SEISandtheRecordofDecisionissuedon July3,1997. Thereareactuallytwowrittenreevaluations,aswellasanew RecordofDecision.The firstre-evaluationconsiderschangesinforecastaviationactivitylevelsandchangesto themasterplanupdateprojects.Itassessestheenvironmentalconsequencesofthe changeson noiseandlanduse,airquality,andsurfacetraffic.Itidentifiesno significant changeintheimpactsreportedpreviously.The secondre-evaluationreviewsthenew biologicalinformationthathasariseninthelastfouryears,includinginformationon wetlands,endang_'exiandcandidatespecies,commerciallymanagedfishspecies,and migratorybirds.Italsodeterminesthereisno significantchangedenvironmentalimpact. YourMemorandum forRecordasksspecificallyaboutpotentialchangedairquality impacts.Inadditiontothereviewdescribedinthewrittenre-evaluation,we have obtainedacommitment_om thePortofSeattletoannuallydemonstratecompliancewith 1273 AR 051004 de-minimis threshold levels. This commitment will be a condition of grants for the master plan update improvements. As a result of these written re-evaluations, we have concluded that the recent MPU project modifications and the new information concerning environmental impacts do not warrant prt.parationof a new SF__. The .-nclosed Record of Decision, to which the re- evaluations are appended,describes the analyses and conclusions. We hope this information addresses your questions and concerns with respect to therw issues. If you have any furtherquestions, do not hesitate to contact our office. Sincerely, Lowell H. Johnson Manager, Airports Division Northwest Mountain Region CC" Muffy Walker, COE Regulatory Branch bcc: ANM_I0 SEA-ADO AR 051005 EXH1273051004 EXH1273051005

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Add to CalendarMWednesday Mar 11, 9:00am - 11:35am
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Call to order – Roll Call – Quorum Established – Land Acknowledgement We would like to acknowledge that our Agency operates in four present-day counties, which are the traditional lands of the Coast Salish people, past and present. This acknowledgement does not take the place of authentic relationships with indigenous communities in our jurisdiction and [...]