Established in 1938, Central Missouri Electric Cooperative, Inc. serves over 10,000 meters in rural Benton, Pettis and Saline counties in Missouri. CMEC exists to provide the best possible electric … Established in 1938, Central Missouri Electric Cooperative, Inc. serves over 10,000 meters in rural Benton, Pettis and Saline counties in Missouri. CMEC exists to provide the best possible electric service at the lowest possible cost to the member‑owners in the area it serves.