TagArmy Corp of Engineers(124)

The Port of Seattle recorded this Declaration of Restrictive Covenants to permanently protect the Tyee Valley Golf Course Mitigation Area as a natural wetland, as required by the Washington State Department of Ecology and the U.S. Army Corps of Engineers in connection with the construction of Sea-Tac Airport's third runway. The declaration prohibits clearing, grading, filling, and construction within the mitigation area, with limited exceptions for approved wildlife management, monitoring, maintenance, and stormwater infrastructure. It was established to satisfy federal Clean Water Act requirements and state water quality standards by preserving and enhancing wetland and riparian habitat displaced by airport expansion.

Northwest Hydraulic Consultants submitted follow-up technical comments to the U.S. Army Corps of Engineers and Washington State Department of Ecology regarding stormwater, hydrology, and hydraulics concerns related to the proposed third runway at Seattle-Tacoma International Airport. The letter, written on behalf of the Airport Communities Coalition, challenges the Port of Seattle's responses to earlier criticisms, raising unresolved issues about stormwater management standards, independent design review, cost estimates for detention facilities, and the accuracy of hydrological modeling. Key concerns include ambiguity in which stormwater standards will apply, inadequate quality assurance processes, and inconsistencies in the project's Stormwater Management Plan.

Record of telecon dated 6-21-01, call from Ann Kenny. Notes that Port has agreed to pay for new scope and minor plan sheet changes. Jim to be given confirmation in writing. July 9th Low Flow meeting scheduled. Parametrix involvement noted — panel 6 may be larger with potential impact. Meeting with Corps to be set

Letter dated June 21, 2001 from Jeannie Summerhays (Washington Department of Ecology, Northwest Regional Office) and Elizabeth Leavitt (Port Of Seattle, Aviation Environmental Programs, Seattle-Tacoma International Airport) to Tom Mueller, Chief, Department of the Army Corps of Engineers, Seattle District, Regulatory Branch. Pursuant to 15 CFR § 930.60, Ecology and the Port Of Seattle mutually

A biologist with Columbia Biological Assessments submitted a formal rebuttal in June 2001 challenging the Port of Seattle's environmental responses related to proposed Master Plan Update Improvements at Seattle-Tacoma International Airport. The rebuttal argues that the Port failed to adequately assess impacts on Miller Creek, particularly regarding fish habitat, water temperature, and dissolved oxygen levels during summer months. The author contends that no proper baseline survey of fish and aquatic organisms was conducted, making regulatory approval and proposed mitigation measures scientifically insufficient.

In June 2001, the EPA's Region 10 office submitted formal comments to the U.S. Army Corps of Engineers regarding the Port of Seattle's Sea-Tac Airport Third Runway project, which proposed filling over 18 acres of wetlands and 980 feet of Miller Creek. The EPA raised concerns about unresolved hydrological impacts, including the effects of a proposed retaining wall on nearby wetlands and groundwater flows, the adequacy of buffers around borrow pits, and the Port's undisclosed plans for vacant land parcels in the project area. The agency urged the Corps to carefully review these wetland and Clean Water Act compliance issues before issuing a construction permit.

U.S. Fish and Wildlife Service (FWS) biological opinion (FWS Reference #1-3-00-F-1420) transmitted to Lowell H. Johnson of the Federal Aviation Administration (FAA) regarding effects of the proposed Master Plan Update Improvements (MPUI) for Seattle-Tacoma International Airport (Sea-Tac) in King County, Washington on threatened bull trout (Salvelinus confluentus), bald eagle (Haliaeetus leucocephalus), and marbled murrelet (Brachyramphus

U.S. Fish and Wildlife Service (FWS) biological opinion (FWS Reference #1-3-00-F-1420) transmitted to Lowell H. Johnson, Federal Aviation Administration, regarding effects of the proposed Master Plan Update Improvements (MPUI) for Seattle-Tacoma International Airport (Sea-Tac) in King County, Washington on threatened bull trout (Salvelinus confluentus), bald eagle (Haliaeetus leucocephalus), and marbled murrelet (Brachyramphus marmoratus) under Section

An independent wetland scientist, writing on behalf of the Airport Communities Coalition, raised concerns with the US Army Corps of Engineers about potential mapping errors affecting Wetland 44a near the proposed SR509 Temporary Interchange for Sea-Tac Airport's Third Runway project. The letter warned that discrepancies between engineering drawings and actual field conditions could mean the wetland was closer to the construction zone than documented, risking illegal filling or sediment discharge into protected wetlands. The scientist urged the Corps to verify the wetland's true location and review erosion control measures before approving any construction permits.

Wetland photographs and maps prepared by Parametrix, Inc. for Port Of Seattle, May 2001, as part of the Master Plan Update Improvements for Seattle-Tacoma International Airport. Document AR031166 includes a Wetlands Atlas covering North and West Sides of Sea-Tac Airport, with 15 map sections showing surveyed wetland boundaries, estimated wetland boundaries, and other estimated or