Peoria County approves $1.5 billion Four Creeks wind farm after split votes

Peoria County, Illinois, has officially approved the Four Creeks wind farm, a $1.5 billion, 500-megawatt energy project. The development is being led by Repsol Renewables, which secured final county board approval on November 5.

According to CleanTechnica, the approval follows a series of local government reviews and public hearings over the past several months.

This decision allows the project to move forward in the permitting process, though further regulatory steps remain before ground can be broken.

Siting and Scale

• The Four Creeks wind farm spans 27,000 acres of private land in Peoria County.
• The project will feature 113 turbines, with each unit occupying less than one acre of land.
• Repsol Renewables cited the site’s "robust wind resource, its proximity to the existing electric transmission system..." when assessing its suitability.
• Construction permits are still required before physical work can begin.

Local Economic Impact

The firm has set aside over $193 million for four specific school districts: Princeville, Brimfield, Williamsfield, and Stark County.

Beyond these direct educational grants, the initiative is projected to yield considerable property tax income for Peoria County, amounting to $44.7 million. An additional $69.4 million in property tax proceeds will be channeled to targeted community assets. This second allocation underwrites libraries, fire districts, Illinois Central College, local road authorities, and the Greater Metro Airport Authority.

Recipient	Amount
School Districts (Princeville, Brimfield, Williamsfield, Stark)	>$193 million
Peoria County	$44.7 million
Community Resources (Libraries, Fire, ICC, Roads, Airport)	$69.4 million

During the approval proceedings, Peoria County Board member Terry Ruhland noted the intricacy of assessing the local impact, remarking, "I don’t know how many people are in this room; I won’t."

Regulatory Path

The approval process for the Four Creeks wind farm involved multiple layers of local government review, each with distinct voting outcomes. The first hurdle came from the Zoning Board of Appeals, which issued an initial decision in September. That body voted 4-1 to deny the project’s zoning application, sending the proposal back for further deliberation.

The matter then moved to the Peoria County Board’s land use committee. On November 6, the committee issued a recommendation to the full board, passing the project by a 6-3 vote.

Alongside the approval, the county attached 36 specific restrictions governing the project’s construction and operations. These conditions form a binding framework that Repsol Renewables must follow, covering aspects of the build-out and long-term maintenance.

Federal Litigation and Developer Strategy

The project’s advancement occurred against a backdrop of intense federal regulatory conflict. In August 2025, the Department of Defense halted its standard review process for wind turbines exceeding 200 feet, a move that placed at least 155 onshore projects totaling 45 gigawatts into limbo. This policy shift prompted a lawsuit by a coalition of clean energy organizations and developers. In July, Attorneys General from 19 states, including Illinois Attorney General Kwame Raoul, intervened to support the legal challenge. Raoul noted that federal law requires developers to submit proposals for tall turbines to the Federal Aviation Administration, which then refers them to the DoD for conflict checks. He stated that officials "ceased countersigning mitigation agreements, stopped sending completed agreements to developers for signature, and delayed or halted communications with developers about mitigation."

On August 6, a federal judge in the US District Court for the District of Oregon ordered the DoD to resume its normal review process. Despite this ruling, the DoD reportedly approved only 11 projects in the subsequent weeks. Repsol Renewables began submitting paperwork for Four Creeks on August 14, one week after the Oregon decision. The developer cited the site’s compatibility with existing land use, referencing Peoria County Code provisions that permit commercial wind farms in certain agricultural districts. The project also impacts local property owners, who are expected to receive escalating lease payments. The full approval process, including the remaining construction permits, could take up to five years before construction begins.

What to watch

Repsol Renewables must still secure all required construction permits before any physical work can start.