The US Department of the Interior (DOI) has paused all large-scale offshore wind project leases due to national security concerns identified in classified reports by the Department of War. The pause affects projects including Vineyard Wind 1, Revolution Wind, CVOW – Commercial, Sunrise Wind, and Empire Wind 1. The decision aims to assess and mitigate risks such as radar interference from turbine blades and towers, which can create false or obscured targets. The Interior emphasized that the move prioritizes national security while working with leaseholders and state partners to address these vulnerabilities. The DOI writes:
The Department of the Interior announced today that it is pausing—effective immediately—the leases for all large-scale offshore wind projects under construction in the United States due to national security risks identified by the Department of War in recently completed classified reports. This pause will give the Department, along with the Department of War and other relevant government agencies, time to work with leaseholders and state partners to assess the possibility of mitigating the national security risks posed by these projects.
“The prime duty of the United States government is to protect the American people,” said Secretary of the Interior Doug Burgum. “Today’s action addresses emerging national security risks, including the rapid evolution of the relevant adversary technologies, and the vulnerabilities created by large-scale offshore wind projects with proximity near our east coast population centers. The Trump administration will always prioritize the security of the American people.”
The following leases are paused:
Vineyard Wind 1 (OCS-A 0501)
Revolution Wind (OCS-A 0486)
CVOW – Commercial (OCS-A 0483)
Sunrise Wind (OCS-A 0487)
Empire Wind 1 (OCS-A 0512)As for the national security risks inherent to large-scale offshore wind projects, unclassified reports from the U.S. Government have long found that the movement of massive turbine blades and the highly reflective towers create radar interference called “clutter.” The clutter caused by offshore wind projects obscures legitimate moving targets and generates false targets in the vicinity of the wind projects.
The Department of Energy in a 2024 report stated that a radar’s threshold for false alarm detection can be increased to reduce some clutter, but an increased detection threshold could cause the radar to “miss actual targets.”
Today’s action ensures that national security risks posed by offshore wind projects are appropriately addressed and that the United States government retains its ability to effectively defend the American people.
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