M-S-R Public Power Agency currently contracts for the entire capacity of the Big Horn I Wind Energy Project located near Bickleton, Washington, which is north of the Columbia River Gorge. This project is owned and maintained by Big Horn I, LLC an affiliate of Iberdrola Renewables Inc. (IBR). Big Horn I is situated in area known for its exceptional wind resources and interconnects with existing Bonneville Power Administration transmission lines.

This project consists of 133 General Electric 1.5 MW variable-speed, constant frequency design with aerodynamic airfoils on a 77-meter rotor. Big Horn I is rated at 199.5 MW. Typically a 200 MW wind farm can provide clean, renewable electricity to more than 60,000 homes, according to the American Wind Energy Association calculations. Delivery of this energy to M-S-R PPA membership is through a shaping and firming agreement with IBR where in M-S-R PPA delivers energy to IBR at the Big Horn bus and IBI delivers an equivalent amount of energy to M-S-R PPA at the California-Oregon Border.