TagWater Quality(53)

The City of Des Moines 2015 Surface Water Comprehensive Plan is a technical planning document prepared by Parametrix engineers in March 2015 for the City of Des Moines, Washington. It addresses the management and infrastructure of the city's surface water systems, covering stormwater and drainage planning for the community. The plan was certified by licensed professional engineers and serves as a long-term guide for surface water improvements in the Des Moines area.

The Washington State Department of Ecology issued this draft addendum to address shortcomings in the NPDES wastewater discharge permit for Seattle-Tacoma International Airport, following a ruling by the Pollution Control Hearings Board. The document outlines required changes to how the Port of Seattle manages contaminated wastewater from aircraft deicing operations, including stricter pollution limits, improved treatment standards, and enhanced water quality monitoring of nearby waterways such as Miller Creek. The revisions focus on reducing harmful biochemical oxygen demand (BOD) discharges into Puget Sound and ensuring the Port implements all available pollution control measures as quickly as possible.

In June 2004, the Washington State Department of Ecology granted a Water Quality Certification to the Port of Seattle for the construction of a third parallel runway at Seattle-Tacoma International Airport (Sea-Tac), along with related projects such as taxiways, navigational aids, and runway safety areas. The certification, designated Order #1996-4-02325 (Amended-2), was updated to reflect a Washington Supreme Court ruling and confirms that the project complies with applicable provisions of the Clean Water Act and state environmental laws. The approval is subject to conditions including compliance with hydraulic project approvals and stormwater permits issued by state agencies.

This King County map, dated March 15, 2004, identifies Walker Basin environmental projects including Estuary Improvements, Headwater Wetland Purchase and Protection, and Guardrail Painting. The map highlights key natural features such as lakes, ponds, streams, creeks, and wetlands within the Walker Basin boundary. Projects are categorized by type, including habitat and water quality initiatives, and are plotted against major streets and waterways in the area.

This King County map document, dated March 15, 2004, identifies and locates various Miller Creek basin improvement projects in the Seattle area, including flow control, habitat, and water quality initiatives. Featured projects include Estuary Improvements, Ambaum Pond, Miller Creek RDF Improvements, Culvert Modifications, Guardrail Painting and Asphalt Removal, and work at the City Light Property and Hermes Depression sites. The map serves as a visual reference for environmental and stormwater management efforts within the Miller Basin boundary.

This is a public comment form from a March 11, 2004 King County meeting about the Miller, Walker, and Salmon Creek Basin Plan, asking residents for input on salmon restoration efforts and environmental priorities. The form poses questions about whether it is worthwhile to restore fish runs in Salmon Creek given no fish have been seen for roughly 20 years, and how to prioritize restoration of Lake Hicks and related projects. It also asks residents how much they would be willing to contribute through increased taxes and fees to fund these efforts.

This King County map, dated December 8, 2003, identifies Potential Water Quality Regulatory Areas within the Walker Creek Basin, highlighting features such as streams, lakes and ponds, wetlands, potentially regulated parcels, and potentially regulated roads. The map was compiled by King County staff to support water quality planning and regulation in the basin. Note that while this document relates to King County environmental planning, it does not directly address Sea-Tac Airport noise policy.

This is a National Pollutant Discharge Elimination System (NPDES) waste discharge permit issued by the Washington State Department of Ecology to the Port of Seattle for SeaTac International Airport, originally effective October 1, 2003. The permit regulates the discharge of industrial wastewater and stormwater into receiving waters including Puget Sound, Des Moines Creek, Miller Creek, Walker Creek, and other local waterways. It sets effluent limits, monitoring requirements, and operational standards for the airport's Industrial Wastewater System to protect water quality in the surrounding region.