APPROXIMATELY LOCATED IN OR AROUND THE BARE MOUNTAIN MINING DISTRICT; PAPKE INDUSTRIAL MINERALS FILES; LIST OF CLAY DEPOSITS WITH SHORT DESCRIPTIONS; LOCATION MAP; MARKET FOR COLUMBIA RIVER POWER MINES, 338.209795, SECTION 4, VOL. 4; SITE NAME: SHEPARD CLAY MINE, AMERICAN CLAY CO.; COMMODITY: CLAY; AUTHOR: HEDGE, E.T.