TagDes Moines Creek(169)
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1997-06-01Symonds Stormwater System June 1997
Engineering drawing prepared by Symonds Consulting Engineers for the Port of Seattle, titled 'Comprehensive Storm Drainage System Plan and Design – Storm Water Conveyance System, June 1997 Planned Conditions' (Drawing No. C-3258, Project No. 94066). The plan depicts SeaTac International Airport's stormwater drainage basins, outfall locations (Outfalls 002–016), storm flow monitoring locations, and drainage connections to Des Moines Creek and its east tributary. -
1996-11-01EXH AR039950: Fill Material Alternative Delivery Method Study for Third Runway, Phase I — Seattle-Tacoma International Airport
HNTB-prepared Final Draft Phase I study (November 1996) for Sea-Tac Airport Third Runway fill material alternative delivery methods. Evaluates transport corridors including Corridor 1 (Des Moines Creek barge transfer and land conveyor), Corridor 2 (SR 509 conveyor, truck, rail), and Corridor 3 (SR 518 conveyor, truck, rail). Covers technical viability, construction/environmental permitting (local, state, federal), -
1993-12-22Port Of Seattle Letter to Barbara Stuhring: Ethylene Glycol Deicing at Sea-Tac Airport and Wastewater Treatment
A 1993 letter from the Port of Seattle to a Des Moines resident explains that airline deicing at Sea-Tac Airport uses only FAA-approved ethylene or propylene glycol, and that wastewater from deicing drains to the airport's treatment system before being discharged to Puget Sound — not to Miller or Des Moines Creeks. The Port acknowledged its treatment plant was not designed to handle glycols and was evaluating upgrades. A follow-up 1996 letter challenges a contradictory statement in the airport's Final Environmental Impact Statement, which claimed most deicing fluids were contained and treated by the Port's Industrial Wastewater System. -
1993-12-22
Port Of Seattle Letter to Barbara Stuhring: Ethylene Glycol Deicing at Sea-Tac Airport and Wastewater Treatment
December 22, 1993 letter from Port of Seattle to Barbara H. Stuhring of Des Moines, WA responding to her November 17 inquiry about ethylene glycol and propylene glycol deicing fluid use at Sea-Tac Airport. Letter states FAA requires only ethylene or propylene glycol for aircraft deicing, that deicing areas drain to the airfield wastewater treatment -
1992-02-01Des Moines Creek water quality study
A 1992 water quality study of Des Moines Creek, prepared by Parametrix, Inc. for the FAA and Port of Seattle, assessed the health of the creek during storm runoff events. The creek, which originates near Sea-Tac International Airport and flows to Puget Sound, had its aquatic ecosystem severely damaged by jet fuel spills in 1985 and 1986. The study sampled seven locations along the creek and three tributaries to identify water quality problems and determine whether stormwater pollution from airport operations was causing toxic conditions. -
1991-12-18Des Moines Creek Parametrix 1992 Water Quality Study Monitoring Stations Map
A map dated December 18, 1991 showing water quality monitoring stations (labeled DC-1 through DC-8 and TRIB-1 through TRIB-3) along Des Moines Creek and its tributaries in the Des Moines, Washington area near Sea-Tac Airport. The map identifies local landmarks including Bow Lake, Angle Lake, Puget Sound, Des Moines Marina, and major roads including Pacific Highway S, SR 99, and Military Road. -
1976-06-16Sea-Tac Communities Plan South Acquisition Area Equestrian Zone Map, June 1976
A planning map labeled 'Sea-Tac Communities Plan' showing the south acquisition area designated for equestrian use, featuring a 38-acre equestrian zone, Hillgrove Cemetery, a community use reserve, and adjacent park areas near Des Moines Creek. The document is numbered POS 994, revised June 16, 1976, sponsored by the Port of Seattle and King County, and catalogued as page 28, section 6.6.3. -
1974-01-06Policy Advisory Committee meeting, Sea-Tac-Communities Plan
This document summarizes a Policy Advisory Committee meeting for the Sea-Tac/Communities Plan, covering recommendations to improve local creek water quality through sewer hookups, tree planting, and holding ponds. It also describes a University of Washington study on how nighttime aircraft noise disrupts sleep for residents near Sea-Tac Airport. Additionally, a proposed Bi-Centennial parkway project linking Burien's waterfront to the airport was presented, with a request for the committee's full endorsement. -
1957-07-17Water pollution historical documents (1948-1957)
This collection of historical documents from 1948 to 1957 chronicles ongoing water pollution problems caused by Sea-Tac Airport's drainage of aircraft wash water, oils, and chemicals into nearby Miller Creek and Des Moines Creek. The records show repeated fish kills, contamination of private property, and years of failed or inadequate treatment solutions, prompting complaints from residents, state legislators, and wildlife agencies. Despite numerous proposals and temporary fixes, the Washington State Pollution Control Commission continued to pressure the Port of Seattle to develop a permanent waste disposal system throughout the period.