The Green River Wind Farm is an up to 212 megawatt (MW) wind farm under development in Whiteside and Lee Counties in Illinois. The project is a development of Geronimo Energy, LLC, a utility-scale developer based out of Edina, Minnesota. Green River is located on approximately 13,500 acres of flat agricultural land in north central Illinois. This site was chosen because the land boasts tremendously competitive wind speeds, and it is situated next to Walnut Ridge Wind Farm, another Geronimo Energy development. Geronimo plans to construct up to 60 turbines and will work with both local and nationally respected construction partners to bring the project to completion. Green River currently includes 45 participating landowners. Construction on the project is anticipated to begin as soon as the spring of 2015.

Operational Capacity: up to 212 megawatts (mw)
Location: Whiteside and Lee Counties, Illinois
Number of Turbines: up to 78
Acres in Project Footprint: Approximately 13,500, with less than 39 acres taken
out of agricultural production during operation.
CO2 Emissions Reduced: ~604,000 metric tons/ year
Landowner Payments: ~$700,000/ year
Local Community Fund: up to $42,400/ year
Direct Local Economic Impact: ~$35 million over 20 years

The Green River is a wind farm development that Mainstream Renewable Energy began working on in 2009. Geronimo acquired Green River from Mainstream in December of 2013. Immediately following the acquisition, Geronimo took steps to qualify Green River under the Production Tax Credit (PTC), which expired December 31, 2013. Although the PTC was allowed to expire at the end of 2013, the safe-harbored Green River will still be eligible to receive tax credits under the PTC for upwards of 10 years. Geronimo took the same steps for Green River’s sister farm, Walnut Ridge.


Green River is located approximately 2 hours southwest of Chicago and 1 hour east of Davenport, IA. The average wind speed in the footprint is approximately 7.4 meters per second, or 16.5 miles per hour. The prevailing wind direction is typically from the west and south.

Economic Impact Sheet
Community Impact Sheet