monongalia decker's creek limestone co. deckers creek mine rt 7 east limestone 46 252 109,407 1,580,694 monongalia greer limestone co. greer limestone mine rt. 7 east limestone 81 252 179,373 2,270,310 monongalia lp mineral, llc humphrey quarry # 1 rt. 100, maidsville, wv limestone 50 312 42,631 morgan u. s. silica co.