The village of Moscow, Ohio, population 185, sits along U.S. 52 about 18 miles from the Interstate 275 outer belt around Cincinnati. Standing at the post office parking lot and looking toward the skate park, you canât miss the William H. Zimmer power plant. Its single smokestack and its cooling tower dominate the landscape there at Moscow. The plant has been in operation since 1991, making it one of the newer coal-burning power plants in this part of the Ohio Valley, if not the newest. It originally was to have been a nuclear power plant, but construction problems led its developer to build a coal-burning plant instead.