The National Environmental Policy Act (NEPA) requires all Federal agencies to consider the impacts of proposed actions on the human environment and involve the public in the NEPA process. The Environmental Planning and Historic Preservation (EPHP) Team publishes all Environmental Impact Statements and Environmental Assessments of regional or national significance for public notice and comment. Interested parties can view recent draft and final NEPA documents below. Contact information for each project are included in each posting.

On April 23, 2019 CG-47 released the U.S. Coast Guard Environmental Planning Policy, COMDTINST 5090.1 (series) (EP CI) and the Environmental Planning Implementing Procedures (EP IP).  The EP CI mandates the use of the EP IP.  The two documents now align with the DHS NEPA policy, Implementation of the National Environmental Policy Act, Department of Homeland Security Instruction Manual 023-01-001-01 (series) and replace the old Coast Guard National Environmental Policy Act (NEPA) Implementing Procedures and Policy for Considering Environmental Impacts, COMDTINST 16475.1D, which has been cancelled. The EP CI and IP include significant changes to the Coast Guard environmental planning process and provide improved policy and procedures for complying with both NEPA and Environmental Effects Abroad of Major Federal Actions, Executive Order (EO) 12114.  Coast Guard members engaged in environmental planning efforts or taking actions that trigger NEPA or EO 12114 requirements must read both the EP CI and IP in order to implement their requirements effectively.  Significant changes from COMDTINST M16475.1D included in the EP CI and IP include but are not limited to:

  • Policy and procedures on the requirements of EO 12114.
  • Pre-planning process and notification requirements for NEPA and EO 12114.
  • Timing of compliance with other related environmental mandates (ESA, NHPA, etc.).
  • Requirements to track and report mitigation and monitoring commitments.
  • Requirement to establish formal agreements for providing environmental planning support.
  • Specific guidance for both the acquisitions and shore facilities management programs

Policy Documents

USCG Environmental Planning Policy, COMDTINST 5090.1

Environmental Planning Implementing Procedures for COMDTINST 5090.1 Environmental Planning Policy

Modernization of Base Seattle, Notice of Intent to Prepare a Programmatic Environmental Impact Statement and Initiation of Public Scoping



The U.S. Coast Guard proposes to modernize Coast Guard Base Seattle in Seattle, Washington by acquiring land and making improvements over approximately the next 10 years to resolve incompatible land uses, provide new infrastructure, increase berthing capacity, upgrade existing facilities and infrastructure, reduce congestion and parking shortfalls, provide a safer work environment, and enhance physical security capabilities.

Information on the scoping process can be found at  Scoping information can also be found below.

The USCG will accept public comments and input for a 45-day period from May 7, 2021 to June 21, 2021. Comments and related material should be submitted to the online docket at by searching for Docket Number USCG-2021-0183 or “Base Seattle PEIS”. If material cannot be submitted using the online docket, please email for assistance. Written comments can be sent to:  U.S. Coast Guard, Shore Infrastructure Logistics Center-EMD, Attn: Mr. Dean Amundson, 1301 Clay Street, Suite 700N, Oakland, CA 94612-5203. Include the Docket Number USCG-2021-0183 in all submissions. All comments received will be posted without change to