Welcome
Welcome to the United States (U.S.) Department of the Navy's webpage for the Environmental Assessment (EA) for Homeporting of the Columbia-Class Submarine at Naval Base Kitsap-Bangor (NBK-Bangor) Washington.
The Navy has prepared this Environmental Assessment in accordance with the National Environmental Policy Act and Department of Defense (DoD) NEPA Implementing Procedures. The Navy proposes to replace the Ohio-class submarines currently homeported at NBK-Bangor with newer Columbia-class submarines. Under the Proposed Action, the Navy would replace up to eight Ohio-class submarines with up to eight Columbia-class submarines, and demolish, construct, and renovate facilities and infrastructure at two upland sites (Upland Site-North and Upland Site-South), and Delta Pier at NBK-Bangor. The Proposed Action would not require in-water work. There would be no overall changes in personnel numbers stationed or numbers of submarines homeported at NBK-Bangor.
Construction is anticipated to begin in July 2027, take approximately five years to complete, and would be phased to be completed prior to the anticipated arrival of the first Columbia-class submarine around 2032.