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Contact the Water Resources Agency at the University of Delaware, Bath Township (Summit County, Ohio) or Summit County Department of Development, Planning Section. All have some type of riparian setback requirements. Mostly, they're recent and may not have a lot of experience. There is also the Chagrin Watershed group (Geauga County, Ohio) and I believe the State of Maryland can help regarding their Chesapeake Bay protection program. All have web sites. Good luck.