FRANKFORT, Kentucky, Aug. 12 -- The Kentucky Public Service Commission, Frankfort, has granted the Sierra Club full intervention in a proceeding involving Kentucky Power Co., Ashland. The motion, filed on behalf of the environmental group, was approved in an order (Case No. 2025-00175) regarding the utility's application for approval of capital investments. Kentucky Power's application seeks approval for making capital investments that would allow it to continue using the Mitchell Generating St more PR