A federal judge has directed the Pentagon to resume its review of onshore wind energy projects, ending a freeze that had effectively halted wind power development across much of the United States. The decision came Thursday from Judge Karin Immergut of the U.S. District Court for the District of Oregon, who issued a preliminary injunction in a lawsuit brought by a coalition of renewable energy groups challenging the Defense Department's delays.
The plaintiffs argued that the Pentagon’s suspension of military reviews, which assess whether proposed wind farms interfere with radar systems or flight paths, was unlawful. Since April, the department had stopped processing these reviews altogether, preventing projects from obtaining necessary clearances to move forward. The freeze occurred amid heightened national security concerns cited by the Trump administration, which contended that wind turbines could pose risks, such as hampering drone detection and affecting radar performance.
Judge Immergut concluded that the renewable energy groups were likely to succeed in their claims and found that the Pentagon had violated statutory deadlines by halting reviews. She ordered the Defense Department to promptly resume its evaluations and to provide the court with status updates every 30 days as the case proceeds.
The freeze has had a major impact: at least 106 wind projects across 21 states have been stalled indefinitely, representing an estimated $47 billion in potential investment. The affected developments account for roughly 29 gigawatts of wind capacity awaiting Pentagon review, out of the approximately 44 gigawatts of wind projects currently in various stages of approval or development nationwide. To put this capacity in perspective, one gigawatt of wind energy can supply electricity for about 300,000 homes, although turbines do not operate continuously.
The wind power industry has long been required to seek federal aviation clearances before beginning construction. The Federal Aviation Administration refers applications to the Pentagon for national security review, a process that in previous years was routine and completed within set deadlines established by Congress. Some projects may require mitigation agreements, which can involve adjusting turbine layouts or funding upgrades to military radar systems to address interference concerns.
However, starting last August, developers encountered growing delays. While some mitigation agreements were negotiated, the Pentagon withheld final approvals. Then the review process was halted entirely in April, with Pentagon staff instructed to cease work on wind project assessments. Renewable energy advocates characterized the freeze as a politically motivated effort to impede wind power, a technology often criticized by former President Donald Trump. The administration denied political interference, emphasizing the need to evaluate national security implications.
The legal challenge highlights broader tensions, as the Trump administration has consistently taken steps to restrict wind power expansion. This includes a moratorium on new federal land wind projects issued on President Trump’s first day in office, stop-work orders on several offshore wind farms, and agreements to pay companies billions of dollars to abandon wind energy plans.
While the recent ruling does not require the Pentagon to approve individual projects, it compels the agency to resume timely reviews across the sector. Developers argue that prolonged delays could jeopardize their ability to qualify for federal tax incentives or lead to project cancellations. The court’s oversight aims to ensure that national security reviews balance legitimate concerns with the accelerated deployment of renewable energy resources.