EXH1219049771

TO: Ralph Wessels, Port of Seattle _o_to, FROM: Reese P. HasthnSsand Michael J.Bailey, P.E.,Hart Crowser, Inc. RE: Third Runway Project, Borrow Areas 1, 3, and 4 Projected Impacts to Wetlands (revised) c.,_o_ J-4978-62 CC: Marti Louther and JamesC. Kelley, Ph.D., Parametrix, Inc. J. Thomson, P.E., HNTB Derive, On-Site Borrow Activities f alrbanks This memorandum quantifies the potential impacts to wetland resources resulting from development of Borrow Areas 1, 3, and 4, and an on-sitehaul route for use in the construction of the Third Runway embankment. Completion of the Third Runway embankment will require about 17 million cubic yards of compacted earth fill Use of borrow sitesowned by the Port of Seattle (Port) to provide this material will significantly ....... c,_) reduce air quality and local traffic impacts associated with haulage from off-site sources. The Final Environmental Impact Statement (FEIS) (prepared for Sea-Tac International Airport's Proposed Master Plan update development actions) discussed development of Ju_ea_ construction fill material borrow areas from eight identified sourceswithin property controlled by the Port. Based on several factors (wetlands impacts, material types, operational costs) the FinalSupplemental Environmental Impact Statement (FSEIS)indicated that four of these eight on-site resource areas could likely be used to extract a maximum quantity of 15.45 million cubic yards of fill material. Further study by the Port has focused _,-,_-Be_ch on the Borrow Areas designated 1, 3, and 4, which are proposed to provide a combined total of 6.7 million cubic yards. Figure 1 - Site Location Map shows the location of Borrow…

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PSCAA Advisory Council Meeting Agenda
Add to CalendarMWednesday Mar 11, 9:00am - 11:35am
1904 3rd Avenue, Suite 105, Seattle, WA 98101
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 [...]