1. Maryland-West Virginia Piedmont sheet Yale Public content 1891. 2011-05-23T17:43:46Z. 2015-10-21T14:59:44Z. U.S. Geological Survey. English. Public. Garrett County (Md.), Grant County (W. Va.), Hardy County (W. Va.), Maryland, Mineral County (W. Va.), Tucker County (W. Va.), and West Virginia.