The Grand River Dam Authority (GRDA) selected Mitsubishi Power Americas Inc. to install a second 500-MW simple-cycle gas turbine at the Grand River Energy Center to support energy generation while wrapping up coal retirements for Oklahoma’s largest public power utility. 

Florida-based Mitsubishi Power and GRDA agreed to install the turbine at the Chouteau, OK-based facility. GRDA and Mitsubishi in 2017 had replaced one coal-fired unit with a 500 MW combined-cycle turbine. 

GRDA CEO Dan Sullivan said the transition would “enhance our generation portfolio…to meet the growing demands of providing affordable and reliable energy to our customers.” 

The turbine, slated for in-service by April 2026, has operated on hydrogen and natural gas blends, which have delivered a 10%...