TagMiller Creek(252)

Letter dated July 25, 2001 from Keith R. Smith, Water Resources Manager, Port Of Seattle, to Ann E. Kenny, Washington Department of Ecology Northwest Regional Office, clarifying the Low Streamflow Analysis and Summer Low Flow Impact Offset Facility Proposal for Seattle-Tacoma International Airport. Corrections address: embankment recharge calculation using ‘flat outwash grass’; non-contiguous groundwater contributions

Parametrix, Inc. report prepared for Port Of Seattle assessing the existing (1994) and future (2006) hydrologic divide of Miller Creek, Walker Creek, and Des Moines Creek following Master Plan Update (MPU) construction at Seattle-Tacoma International Airport (STIA). Analyzes compliance with Governor’s Certification requirement that the third runway project will not cause changes in the location

Letter dated July 23, 2001 from Port Of Seattle to Ann E. Kenny at Washington State Department of Ecology Northwest Regional Office regarding Low Streamflow Analysis and Summer Low Flow Impact Offset Facility Proposal for Seattle-Tacoma International Airport. Covers summer low streamflow impacts in Des Moines Creek, Miller Creek, and Walker Creek from airport Master

Port of Seattle letter dated July 23, 2001 to Ann E. Kenny, Washington State Department of Ecology, Northwest Regional Office, summarizing low streamflow impact analysis and flow impact offset facility proposal for Seattle-Tacoma International Airport Master Plan Update projects. Prepared by Parametrix, Inc. Analysis covers summer low streamflow impacts to Des Moines Creek, Miller Creek,

A water resources consultant raised concerns in a July 2001 letter to the U.S. Army Corps of Engineers and Washington State Department of Ecology about the Port of Seattle's stormwater management plans for Sea-Tac Airport expansion. The letter challenged the effectiveness of proposed biofiltration swales, noting they can actually increase bacterial levels rather than reduce them, and warned that releasing stored stormwater from detention vaults into nearby Class AA streams could discharge pollutant-laden, oxygen-depleted water into already stressed waterways. The consultant concluded that the Port's plans fell short of providing reasonable assurance that water quality standards would be met.

Final meeting notes prepared by Kate Snider of Floyd & Snider Inc. for the 401 Permit Decision-Making process for the Sea-Tac International Airport Third Runway project, dated July 16, 2001. Attendees included representatives from Washington State Department of Ecology (Ann Kenny), King County (Kelly Whiting), Port of Seattle (Keith Smith), Parametrix, EarthTech, and Aquaterra. Document

Final meeting notes from July 16, 2001 for the 401 Permit Decision-Making process for Sea-Tac International Airport Third Runway, covering low flow analysis for Miller Creek and Walker Creek. Attendees included Ann Kenny (Dept. of Ecology), Kelly Whiting (King County), Keith Smith (Port of Seattle), Paul Fendt and Robert Farid (Parametrix), Rick Schaefer (EarthTech), and

Final draft meeting notes from July 5, 2001 technical meeting on 401 Permit Decision-Making for the Sea-Tac Airport Third Runway, prepared by Rachel McCrea of Floyd & Snider Inc. Attendees include Ann Kenny (Dept. of Ecology), Kelly Whiting (King County), Keith Smith (Port of Seattle), Felix Kristanovich (Foster Wheeler), Paul Fendt and Tom Atkins (Parametrix),

Water Resources Consulting LLC submitted technical comments in July 2001 on behalf of the Airport Communities Coalition, challenging the Port of Seattle's stormwater management plans for SeaTac Airport expansion. The document disputes Port claims about impervious surface increases, water diversions affecting Miller, Walker, and Des Moines creeks, and the effectiveness of bioswale filtration systems for removing pollutants such as metals from airport runoff.

This table from a July 2001 Comprehensive Stormwater Management Plan summarizes drainage area measurements and changes in impervious surfaces (such as pavement and rooftops) across Miller Creek, Walker Creek, and Des Moines Creek watersheds at Seattle-Tacoma International Airport (STIA). It compares 1994 baseline conditions to projected 2006 future conditions, showing a total increase of approximately 305.7 acres of impervious area across all drainage basins. The data was compiled from GIS coverage to support stormwater management planning for the airport's master plan update.