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EXH 259: Declaration Donald E. Weitkamp PhD Support Opposition ACC Motion Partial Summary Judgment

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Sea-Tac Airport
Third Runway
PCHB
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Fish biologist Donald E. Weitkamp submitted this declaration opposing a legal challenge to Sea-Tac Airport's expansion plans, arguing that the airport's stormwater controls and water quality measures adequately protect nearby streams. He concluded that the headwater portions of Miller, Walker, Des Moines, and Gilliam Creeks near the airport are unlikely to support chinook or chum salmon, as urbanization has altered those streams to favor warm-water species instead. The declaration supports the Port of Seattle's position that its Master Plan Update projects meet environmental standards and will not significantly harm local aquatic resources.

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Declaration of Donald E. Weitkamp, Ph.D. (fish biologist) filed in PCHB No. 01-160, Airport Communities Coalition v. State of Washington Department of Ecology and Port Of Seattle. Weitkamp opposes ACC’s motion for partial summary judgment regarding the §401 Certification issued by the Department of Ecology for the Seattle-Tacoma International Airport Master Plan Update Improvement (MPU) projects. Addresses potential adverse impacts to aquatic biota of Miller Creek, Walker Creek, Des Moines Creek, and Gilliam Creek near STIA; fish and salmon use of STIA-area creeks including chum, chinook, and coho salmon; warm water exotic species (yellow perch, black crappie, pumpkinseed sunfish); stormwater best management practices; Biological Assessment (Parametrix 1999); Biological Opinion (U.S. Fish and Wildlife Service); Essential Fish Habitat assessment; Low Streamflow Analysis; Summer Low Flow Impact Offset Facility Proposal; Natural Resources Mitigation Plan; Endangered Species Act consultation; and Puget Sound juvenile salmon migration. Exhibit number 259, AR 019241–019243.

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