William H. Zimmer Power Station

The William H. Zimmer Power Station, located near Moscow, Ohio, is a 1.35-gigawatt coal power plant. Planned by Cincinnati Gas and Electric , with Columbus & Southern Ohio Electric ) and Dayton Power & Light as its partners; it was originally intended to be a nuclear power plant. Although once estimated to be 97% complete, poor construction and quality assurance led to the plant being converted to coal-fired generation. The plant began operations in 1991. Today, the plant is owned and operated by Vistra Energy.

The construction of Zimmer was a consortium of CG&E, Columbus & Southern Ohio Electric, and DP&L. The project was announced in 1969 with a cost of $420 million to construct two 840 MW nuclear power units with completion dates set for 1975 and 1976. The plant is named after William H. Zimmer, who was chairman and president of CG&E from 1962 to 1975. Construction of the plant did not start until 1972 because the Atomic Energy Commission demanded stricter standards to approve of nuclear plants. The second proposed unit was upgraded from 840 MW to 1,170 MW in 1974. General Electric's BWRs were chosen for the plant's nuclear reactors. Ultimately, the second unit was never constructed due to regulatory issues and costs.

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