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Harshman Bridge Harshman Bridge was built in 1894 by Evret S. Sherman. At one time there was a total of 29 covered bridges in Preble County. Harshman Bridge spans Four Mile Creek with 109 feet. Harshman Bridge is constructed with a Child's truss. There are only seven examples of the Child's truss left in the United States. Six are in Preble County and one is in Delaware County, Ohio. Harshman Bridge has a single span and rests on cut blue limestone abutments. The exterior has a red tin roof, white plank siding and one smail window on each side. Each portal has an extended roof. The interior has a low wooden guardrail and vertical floor planking. The Harshman Bridge is listed on the Nationai Register of Historic Places. Dixon
Township. From Eaton, SR 732 south, two miles, right on |