Ohio Rev. Code § 1546.23: Rights unaffected by dedication.

The dedication or setting apart of any state reservoir or lake as a public park or pleasure resort shall not interfere with or affect the use of such reservoir or lake for canal reservoir purposes, and the chief of the division of parks and watercraft shall not be restricted in any manner from making such repairs and improvements thereon as are necessary for maintaining the safety and usefulness of such reservoir or lake for canal purposes. The authority for the division to manage and control such reservoir or lake for canal purposes is the same as if no dedication of such reservoir or lake for park and pleasure resort purposes had been made.