Grand Electric Cooperative, Inc. serves nearly 10,000 square miles of Northwestern South Dakota with dependable electric power. It covers approximately 3,885 energized miles and serves more than 7 counties including: Butte, Corson, Harding, Meade, Perkins, and Ziebach in South Dakota and part of Carter County in Montana. As a Touchstone Energy Cooperative, Grand Electric Cooperative, Inc is owned by the members they serve and we are committed to providing reliable electricity at the lowest price possible. In short, co-ops “look out” for the members they serve. Authorized Generac Generator Dealer. Touchstone Energy co-ops provide high standards of service according to their four core values: integrity, accountability, innovation and commitment to community.