EXH1290052091

U.S. Department Northwest Mountain Region 1601 LindAvenue,S. W. of Transportation Colorado,Idaho,Montana Renton.Washington980554056Oregon,utah, Washington, Federal Aviation Wyoming Administration September19,2001 Mr. Thomas F. Mueller U.S. Army Corps of Engineers RegulatoryBranch,SeattleDistrictOffice P.O.Box 3755 Seattle,WA 98124-3766 DearMr.Mueller: Per your August 15, 2001, letter requesting a response to the question of how the operational data available today compares to the model predictions from SIMMOD, we are providing the attached paper. If you have any further questions, please contact our office. Sincerely, H,Johnson Managor, Airports Division Northwest Mountain Region Enclosure AR 052091 NOV.-08'Ol(THU)09:25 US-COE-REGULATORYBRANCH TEL:2067646602 P.005/006 9/I912001 DELAY AT SEATTLE-TACOM_ INTERNATIONAL AIRPORT (SEA) The purpose of this paper is to address the question raised in the August 15, 2001 letter from Mr. Thomas Mudler, US Army Corps of Engineers: Based on the operations data m,ailable today, how does this data compare to the model predietion,¢ /rom S_,OdOD ? The following sections summarize how delay was first recognizedat SEA, the use of models to evaluate delayconditions, andfinally,a comparison of various delaymetrics used to measure actualdelay. I, Conditions Leadinl_ the Rc_ion to Show the Need for the Runway (Pre-1995) The evolution of how the Port, FAA, andPuget Sound Region first began to identify the need for a third parallelrunwayat SEA goes back to the consequences of deregulationof the aviationindustry. By 1984, carders served SEA, an increase from 12 carders prior to airline deregulation in 1979. In 1985, Horizon Airlines began service to smaller cities with small aircraft service; as a result, aircraft operations at SEA grew at an…

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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 [...]