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Welcome to the United States (U.S.) Department of the Navy's Columbia Class Homeporting Environmental Assessment (EA) website.

United States Fleet Forces Command, a Command of the United States (U.S.) Navy (hereinafter, jointly referred to as the Navy), has prepared this Environmental Assessment in accordance with the National Environmental Policy Act, as implemented by the Council on Environmental Quality Regulations and Navy regulations for implementing the National Environmental Policy Act. The Navy proposes to establish facilities and functions at Naval Submarine Base (NSB) Kings Bay to support the homeporting of the Columbia Class submarines as replacements for the retiring Ohio Class submarines currently homeported at NSB Kings Bay. During the transition period (projected to take place from fiscal year 2028-2042) and to completion, the total numbers of Ohio Class submarines and Columbia Class submarines assigned to NSB Kings Bay would not exceed the number of Ohio Class submarines currently assigned to that facility. The Proposed Action also includes the construction, modification, and demolition of several facilities at NSB Kings Bay to support the transition and action to completion. This Environmental Assessment evaluates the potential environmental impacts associated with the Proposed Action alternative and the No Action Alternative to the following resource areas: air quality, water resources, geological resources, cultural resources, biological resources, utilities and infrastructure, public health and safety, and hazardous materials and wastes.