TCEC (Tri-County Electric Cooperative, Inc.), is a distribution cooperative (Oklahoma 34 Texas County) with headquarters in Hooker, Oklahoma. The cooperative serves approximately 12,000 members and 23,000 meters in the Oklahoma Panhandle, southwestern Kansas, the norther border of the Texas Panhandle and parts of Colorado and New Mexico. Counties served include Texas, Beaver and Cimarron Counties in Oklahoma and Morton County in Kansas.
TCEC's service area lies in the Panhandle of Oklahoma, and is about 35 miles wide and 144 miles long. The area lies at elevations of 1,990 to 4,979 feet. The dark mesas of northwest Cimarron County dominate the highest point. From there, the land drifts eastward in an indistinct decline into the Great Plains, which consists of short grass, game, and buffalo grass prairie land, along with mesquite and sagebrush. The economy of the region is highly dependent on agricultural production, with changes affecting the population, load growth, and electricity sales. The maximum demand for electricity occurs during the summer, rising primarily from irrigation and air conditioning loads during the hot and dry periods.