Supplemental Information: Department of the Army Section 404 Permit Application, Sea-Tac Airport

Notes

A letter from Water Resources Consulting L.L.C. to the Washington State Department of Ecology and U.S. Army Corps of Engineers providing supplemental information regarding stormwater Best Management Practices (BMPs) at SeaTac Airport. The letter addresses concerns about bacteria loading in biofiltration swales, BMP performance monitoring, and the suitability of stored stormwater for flow augmentation in Miller Creek and Des Moines Creek basins. The author argues that the Port of Seattle has not adequately demonstrated that proposed BMPs will meet water quality standards for Class AA receiving waters.

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