Home | Contact Us | Site Map Phone 330.799.2268 • Safety & Environment • How we protect the water table The water supply is protected by 8 5/8 surface casing set to a depth as specified by the Ohio Department of Natural Resources.  This casing is cemented from the bottom to the ground level, which protects any shallow water sources.   © 2006 Ohio Valley Energy Systems, Corp. All rights reserved.     Legal  |   Privacy Policy