Proposed by Mainstream in 2009, the Green River wind farm is spread across 55 square-kilkometres of flat agricultural land with "competitive" wind speeds. Construction work at the site is yet to begin.
While the acquisition was only announced this week, it was concluded in December. Geronimo says is has "taken steps to qualify Green River under the production tax credit (PTC)", which expired at the end of 2013, and believes that the development will be eligible.
Geronimo Energy is already at an "advanced stage" in developing the 210MW Walnut Ridge project, which is adjacent to the Green River project. The company said it also believes this project will qualify for the PTC.
Geronimo president Blake Nixon said that buying the adjacent project will give the company greater flexibility and scalability when negotiating with power purchasers.
A turbine supplier is yet to be announced for the Green River project, but Walnut Ridge features Suzlon's S88 2.1MW turbines.