Thanks Bill. I'll have to do some more reading.
An update from ODNR, on why my dam is a Class III
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The height of the dam is measured from the streambed at the downstream toe of the dam to the top of the embankment which yours is greater than 25ft, the other main determining factor is the road that is directly downstream of the dam. It would more than likely be damaged if the dam were to fail which also puts it in class III. I have attached a classification fact sheet to help explain our regulations.
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