The Sumner power plant, located in Sumner, Iowa, operates under the jurisdiction of the Midwest Reliability Organization within the Southwest Power Pool. This facility utilizes internal combustion technology and has an operating capacity of 5.4 megawatts. The plant is regulated and is wholly owned by the City of Sumner, which also serves as the plant operator. The primary fuel source for the plant is oil, ensuring a reliable energy supply for the local community.