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

Expansion and Modernization of Base Seattle Draft Programmatic Environmental Impact Statement



The U.S. Coast Guard announces the availability of the Draft Programmatic Environmental Impact Statement (PEIS) for the Expansion and Modernization of Base Seattle. The Draft PEIS analyzes the potential environmental and socioeconomic impacts, and identifies related mitigation measures, associated with land acquisition, facility and infrastructure modernization, and continued operation to support current and future Coast Guard missions at Base Seattle. The draft PEIS is now available for public review and comment until December 16th, 2022.

Comments and related material must be post-marked or received by the Coast Guard on or before December 16th, 2022.  Comments can be submitted to docket number USCG–2021–0183 using the Federal eRulemaking Portal at or mailed to:

U.S. Coast Guard, Shore Infrastructure Logistics Center
Environmental Management Division
Attn: Mr. Dean Amundson
1301 Clay Street, Suite 700N

Oakland, CA 94612-5203.

Public Meetings

Dates and Times

November 17th, 2022: 1:00pm - 7:00pm
November 18th, 2022: 11:30am - 3:30pm


Jackson Federal Building
Main Auditorium (4th Floor)
915 2nd Avenue, Seattle WA 98174