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SEPA/NEPA Documents 

What is SEPA?

The Washington State Environmental Policy Act (SEPA) provides a way to identify possible environmental impacts that may result from governmental decisions. These decisions may be related to issuing permits for private projects, constructing public facilities, or adopting regulations, policies or plans.
Information provided during the SEPA review process helps agency decision-makers, applicants, and the public understand how a proposal will affect the environment. This information can be used to change a proposal to reduce likely impacts. For more information about the SEPA process, visit the Washington State Department of Ecology

What is NEPA?

The National Environmental Policy Act (NEPA) was enacted by Congress in December of 1969, and signed into law by President Nixon on January 1, 1970. Federal agencies must comply with the NEPA process, which examines the environmental impact of projects resulting from government decisions.
The Port of Seattle works with Federal Aviation Administration and Environmental Protection Agency surrounding NEPA decisions. For more information on the NEPA process, visit the Council of Environmental Quality.

Open Projects

Alaskan Way Street Improvement Project East Waterway Maintenance Dredging Program Fishermen's Terminal Gateway, West Wall, and Seattle Ship Supply Improvement Project
Pier 66 Interior Improvements Project Seattle Harbor Navigation Improvement
U.S. Army Corps of Engineers officials are seeking public comments on the Seattle Harbor Navigation Improvement Project Draft Feasibility Report and Environmental Assessment.

The Corps and Port of Seattle prepared the Draft Integrated Feasibility Report and Environmental Assessment. It, and supporting documents, are available on the Corps site to view and download. A paper copy is available at these Seattle Public Library Delridge, West Seattle, International District and Highpoint branches.

The 30-day public comment period ran Aug. 2 to 31, 2016.

Corps and Port of Seattle officials will hold a public information meeting and open House:

August 18, 2016
5:30 - 8:30 p.m.
South Seattle Community College, Georgetown Campus
Bldg. C, Room Room C110/111,
6737 Corson Ave S, Seattle, WA 98108

The meeting purpose is to discuss the proposal for Federal action and the alternatives considered as a result of the navigation improvement project study.
Seattle-Tacoma International Airport (Sea-Tac Airport) Concourse D Hardstand Holdroom Sea-Tac International Airport Alternate Utility Facility Seattle-Tacoma International Airport - Flight Corridor Safety Program Seattle-Tacoma International Airport (Sea-Tac Airport) International Arrivals Facility (IAF)
Shilshole Bay Marina Upland Improvement Project
Terminal 5 Cargo Wharf Rehabilitation and Berth Deepening
Terminal 5 Cargo Wharf Rehabilitation and Berth Deepening and Improvements
Final Environmental Impact Statement
Terminal 86 Stormwater Improvement Project
Terminal 91 Pier Underwater Regrading Terminal 91 W-50 Demolition Terminal 117 Fish & Wildlife Habitat Restoration Project


Closed Projects


Port of Seattle SEPA Resolution

Resolution No. 3650 (702 KB, PDF), Adopted 2011. Supersedes Resolution No. 3539 (Adopted 2005), 3211 (Adopted 1996), and 3028 (Adopted 1987).


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