TagStormwater(385)

This figure from the Sea-Tac Airport Stormwater Management Plan maps current fish habitat in the Des Moines Creek, Miller Creek, and Walker Creek watersheds near Sea-Tac Airport. It identifies the fish species present in various streams and lakes in the area, including Coho, Cutthroat, Steelhead, Chum, Chinook, Bull Trout, and Pumpkinseed Sunfish. The map also highlights piped stream segments and areas of potential Chinook and Bull Trout habitat within these interconnected watershed basins adjacent to Puget Sound.

This legal declaration by fish biologist Donald E. Weitkamp was submitted to Washington's Pollution Control Hearings Board in a case involving Seattle-Tacoma International Airport's expansion, including a proposed third runway. Weitkamp argues that the project's stormwater controls and water quality conditions under the §401 Certification are adequate to protect nearby streams, and disputes claims that salmon species are present near the airport's property along the headwaters of Miller, Walker, and Des Moines Creeks. He contends that these streams have already been significantly altered by surrounding urban development, making them more suitable for warm-water fish species than for salmonids.

In this 2001 declaration filed with Washington State's Pollution Control Hearings Board, fisheries biologist Dr. John A. Strand argues that proposed modifications to the Port of Seattle's stormwater discharge permit would harm Walker and Gilliam Creeks near Sea-Tac Airport, which support salmon, trout, and other aquatic life. Dr. Strand contends that Ecology failed to identify specific locations of new construction-related stormwater outfalls, denying the public a meaningful chance to assess environmental impacts. He supports a stay of the permit modification until its compliance with the Clean Water Act can be fully reviewed.

In this 2001 legal declaration, Washington Department of Ecology official Kevin Fitzpatrick addresses water quality concerns raised by the Airport Communities Coalition regarding stormwater discharges from Seattle-Tacoma International Airport during its Third Runway expansion. Fitzpatrick explains that while stormwater discharges have shown elevated levels of copper, lead, and zinc, these instantaneous exceedances do not necessarily constitute violations of state water quality standards, since stormwater fluctuates rapidly by nature. He further outlines steps the Port of Seattle was taking to address pollution, including rerouting de-icing runoff, replacing zinc-emitting metal roofs, and conducting required studies to establish specific effluent limits under the Clean Water Act 401 Certification.

This document is the curriculum vitae of Dr. Peter Willing, a water resources consultant based in Bellingham, Washington, who was retained to review surface and ground water hydrology related to the possible construction of a third runway at Sea-Tac Airport from November 1999 to February 2001. His investigation addressed issues including stormwater management effectiveness, compliance with the King County Surface Water Design Manual, and potential project effects on wetlands, stream flows, and anadromous fish. Dr. Willing holds a Ph.D. from Cornell University and has broad experience in flood analysis, water rights, and geohydrologic investigations across the Pacific Northwest.

Greg Wingard, an environmental consultant and Executive Director of Waste Action Project, submitted this declaration in a 2001 Pollution Control Hearings Board appeal challenging a permit modification for Seattle-Tacoma International Airport's stormwater discharges. Wingard argues that the modified NPDES permit failed to identify the specific locations of new discharge outfalls into local waterways including Miller, Des Moines, Gilliam, and Walker Creeks, preventing meaningful public participation and environmental review. He contends that without knowing where discharges will occur, it is impossible to evaluate potential cumulative impacts on downstream waterways and riparian property owners.

Joseph Brascher, a hydrologic modeling expert at Aqua Terra Consultants, submitted this declaration in a 2001 Washington State Pollution Control Hearings Board case involving the Port of Seattle's Master Plan Update for Sea-Tac International Airport. He describes how the HSPF (Hydrologic Simulation Program – Fortran) computer model was used to analyze stormwater runoff and flow impacts on Miller and Walker Creeks resulting from planned airport construction. The declaration also outlines additional studies and design details requested by the Washington State Department of Ecology as conditions of its §401 water quality certification for the project.

Handwritten record of telecon from Eric Stockdale of DOE (Department of Ecology). Notes reference a senior level person doing work, mention of Kelly, King County, stormwater review, ‘Shou 333 receipt of Bilski’, NEMI biology, informal discussion, need to set up meeting. Also references Jim Kelly of Parometric, Paul Fordt Stormwater Engineer, Politics — third party

Prefiled direct testimony of Steven J. Swenson, licensed civil engineer at R.W. Beck, submitted in PCHB No. 01-160, Airport Communities Coalition (ACC) and Citizens Against Sea-Tac Expansion (CASE) v. State of Washington Department of Ecology and Port Of Seattle. Swenson testifies on stormwater management at SeaTac International Airport (STIA) during construction and operation of Master

NPDES Permit WA-002465-1 fact sheet for the Seattle-Tacoma International Airport (STIA), issued to the Port Of Seattle. Establishes basis for effluent limitations and requirements for discharge of treated industrial wastewater to Puget Sound (WA-PS-0270) and stormwater to Miller Creek (WA-09-2005), Des Moines Creek (WA-09-2000), and the City of SeaTac storm sewer, tributary to Gillian Creek