Final Environmental Impact Statement for the Enhanced Integrated Air and Missile Defense System on Guam Now Available
25-NEWS-0007
July 25, 2025
The Missile Defense Agency (MDA), in cooperation with the United States (U.S.) Air Force, U.S. Army, U.S. Navy, and the Federal Aviation Administration (FAA), has prepared a Final Environmental Impact Statement (EIS) for the Enhanced Integrated Air and Missile Defense (EIAMD) System on Guam. The Final EIS includes an analysis of the potential environmental impacts that may result from the proposed construction, deployment, and operations and maintenance of the EIAMD system to defend Guam against advanced missile threats (Proposed Action). Mitigation measures that could avoid, minimize, or mitigate potential environmental impacts of the Proposed Action are also proposed in the Final EIS.
Public and Stakeholder Involvement
The completion of the Final EIS follows years of data gathering, analysis, stakeholder engagement, and public involvement. The MDA and the U.S. Army held three public scoping meetings in 2023 and two Draft EIS public meetings in 2024, and obtained stakeholder input at several stages during the environmental planning process. The Final EIS includes responses to public comments received on the Draft EIS. The MDA and the U.S. Army will wait a minimum of 30 days after publication of the Final EIS before making a decision on the action.
Final EIS Availability
The MDA and the U.S. Army encourage the public to view the Final EIS, which is available on the MDA public website for download or in print at the University of Guam Robert F. Kennedy and the Nieves M. Flores memorial libraries. If you have questions or would like additional information, please visit www.mda.mil/system/eiamd or email info@EIAMD-EIS.com.
Proposed Action
Within the context of homeland defense, Guam is a key strategic location for sustaining and maintaining U.S. capabilities, deterring adversaries, responding to crises, and maintaining a free and open Indo-Pacific. As a U.S. territory, an attack on Guam would be considered a direct attack on the United States and would be met with an appropriate response. Currently, U.S. forces are capable of defending Guam against today's regional ballistic missile threats. However, regional missile threats to Guam continue to increase and advance technologically. U.S. Indo-Pacific Command identified a requirement for a 360-degree EIAMD system on Guam as soon as possible to address the rapid evolution of adversary missile threats.
The Proposed Action is to construct, deploy, and operate and maintain a comprehensive, persistent, 360-degree EIAMD system to defend the people, infrastructure, and territory of Guam against the rapidly evolving threats of advanced cruise, ballistic, and hypersonic missile attacks from regional adversaries. The proposed system includes a combination of components from MDA, the U.S. Army, and the U.S. Navy that would be integrated for air and missile defense. These components include missile defense radars, sensors, missile launchers and missile interceptors, and command and control systems.
The MDA and the U.S. Army need to strategically locate and integrate the various system components at multiple sites around Guam. The MDA and the U.S. Army identified 16 proposed sites to operate and maintain the EIAMD system on Department of Defense (DoD) properties Guam. A limited number of the proposed sites would require real estate actions on non-DoD properties for access, or where safety zone arcs encroach on non-DoD properties. If the decision is made to proceed with the Proposed Action, site preparation and construction would span approximately 10 years beginning in 2025. The EIAMD operational capability would be phased in as each site completes construction, testing, and final system checks of the installed components. Following final construction, testing, and final system-wide checks, the EIAMD system would become fully operational.
Please help MDA and the U.S. Army keep the community informed by sharing this information.
Visit the MDA public website at www.mda.mil/system/eiamd to learn more about the project and the environmental impact analysis.
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