TagEnvironmental Impact Statement(325)

Internal forwarded email chain dated January 28, 2000, from Erik Stockdale to Tom Luster (copying Sarah Suggs original), forwarding a SEPA register entry (Ecology File# 200000524, LA File# 00-02) for an Addendum EIS issued by the Port of Seattle as lead agency. The addendum EIS covers Third Runway Wetland Fill and Temporary Construction at Sea-Tac

SEPA Addendum dated January 24, 2000, Port Of Seattle, POS SEPA No. 00-02, addressing modifications to the Master Plan Update Development Actions for the Third Parallel Runway at Seattle-Tacoma International Airport. Addendum covers: (1) increased wetland acreage affected by the project, revised from 12.23 acres to 18.33 acres, with 15.41 acres affected by the runway

A November 1999 technical letter from Northwest Hydraulic Consultants, submitted on behalf of the Airport Communities Coalition, identifies major deficiencies in the proposed stormwater management plan for Seattle-Tacoma International Airport's 3rd runway development. The review finds that the plan fails to comply with the 1998 King County Surface Water Design Manual and Washington State Department of Ecology guidelines, including requirements for large-site drainage reviews, offsite analysis, and flow control. The consultants warn that if the plan is approved as written, it could cause significant adverse impacts to downstream creek systems, including Miller Creek and Des Moines Creek.

Parametrix, Inc. prepared this Supplemental Airport Site Wetland and Stream Analysis for Port Of Seattle, dated November 12, 1999 (AR 043120). The report analyzes wetland and stream conditions at three supplemental airport candidate sites — Arlington, Lake Sawyer, and Frederickson — comparing 1994 MSA study findings with 1998 field-verified wetland boundary data. Includes tables comparing

Parametrix, Inc. summary (August 11, 1999) of key wetland findings from the Sea-Tac Runway Fill Hydrologic Studies Report (Pacific Groundwater Group 2000), prepared for the Port Of Seattle Master Plan Update Improvements JARPA review. Covers wetland delineation conservatism, limiting habitat characteristics of Miller Creek, Walker Creek, and Des Moines Creek, salmonid habitat significance, indirect embankment

Draft Wetlands Re-Evaluation Document prepared by Port Of Seattle in August 1999 for Seattle-Tacoma International Airport (STIA) Master Plan Update Improvements. Addresses new information on wetlands and aquatic resources affected by the planned new third runway and related improvements, not available during preparation of the 1996 Final Environmental Impact Statement (FEIS) or 1997 Final Supplemental

Hart Crowser subsurface conditions data report prepared for HNTB Corporation and Port Of Seattle, project J-4978-06, July 1999, supporting 404 permit for Third Runway embankment at Sea-Tac Airport. Covers generalized geologic and hydrogeologic conditions, subsurface soil conditions, hydraulic conductivity estimates, slug testing, water level data, SPT borings (HC99-B31 through HC99-B47), test pits (HC99-TP1 through HC99-TP21,

Email forwarded by Erik Stockdale to Tom Luster, originating from Gail Terzi, regarding SR509 proposal conflicts with Sea-Tac Airport third runway (SASA). Key issues include wetland fills in overlapping areas, moving Des Moines Creek for SR509 while Port Of Seattle spends millions bridging the creek at Tyee, and FAA telling WSDOT they CAN mitigate habitat

This catalog lists documents published or issued in 1997 related to Seattle-Tacoma International Airport (Sea-Tac), covering topics such as master plan updates, environmental impact statements, noise exposure studies, and water quality reports. Key items include FAA Records of Decision, draft and final Supplemental Environmental Impact Statements, FAR Part 150 Noise Exposure and Land Use Compatibility Studies, and public comments from regional commissions and advocacy groups. The collection serves as a reference archive for researchers and stakeholders interested in Sea-Tac Airport's development, noise policy, and environmental compliance during the late 1990s.

Draft Revised Off-Site Wetland Mitigation Plan prepared by Parametrix, Inc. for Port Of Seattle regarding Seattle-Tacoma International Airport Master Plan Update Improvements, dated August 18, 1998 (project number 55-2912-01(03)). Document covers rationale for off-site habitat mitigation, mitigation site selection, revised project wetland impacts as of July 14, 1998, and revised mitigation plan design objectives. Includes