TagStormwater(385)

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.

In January 2010, the Port of Seattle sought approval to advertise construction bids for environmental cleanup work tied to the Seattle-Tacoma International Airport Third Runway project, including removing the 160th Street box culvert, restoring Miller Creek, and converting temporary stormwater ponds into permanent detention facilities. The estimated $6.6 million project was already funded within the previously approved Third Runway budget through Passenger Facility Charges and bond proceeds, requiring no new funding authorization. The work was required to fulfill federal and state permit conditions before the overall Third Runway project could be formally closed out.

The Port of Seattle filed a Notice of Appeal against the Washington State Department of Ecology challenging the terms of a 2003 water discharge permit issued for Seattle-Tacoma International Airport (Sea-Tac). The permit, which governs industrial wastewater and stormwater runoff from airport operations and construction activities, was contested by the Port as imposing undue burdens without corresponding environmental benefits. Over the following six years, the Port faced more than $150 million in projected costs to implement water quality and stormwater control measures under the permit's requirements.

This is a National Pollutant Discharge Elimination System (NPDES) water discharge permit issued by the Washington State Department of Ecology to the Port of Seattle for Seattle-Tacoma International Airport, effective October 1, 2003 through September 4, 2008. The permit governs how the airport is authorized to discharge industrial wastewater and stormwater runoff into surrounding water bodies, including Puget Sound, Des Moines Creek, Miller Creek, and Walker Creek. It sets out special conditions covering discharge limitations, monitoring requirements, toxicity testing, and operations and maintenance standards to protect water quality in the region.

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.

The Washington State Department of Ecology held a public workshop and hearing on March 31, 2003, to discuss the proposed reissuance of a water quality permit for Seattle-Tacoma International Airport. The permit covers industrial wastewater discharges to Puget Sound and stormwater runoff to nearby creeks from airport activities such as aircraft maintenance, fueling, washing, and deicing. Written public comments were accepted through April 15, 2003.