Contact Amy Gerten, ohiolica@gmail.com, she is the executive director of the Ohio chapter of LICA a National Association of Land Improvement Contractors. or- LICA for short, she should be able to put you in touch with or give you a list of contractors in your area that specialize in terraces tiling and dams, and other land improvement practices.
I am currently the VP of the Missouri chapter. we strive to do quality work, will not always be the cheapest contractor but the cheapest is actually seldom the best bang for your buck.
or you can go on their website and check for contractors in your area,
www.olica.org Good Luck!
