Clifford (M&M) Select column header to sort. Hyperlinked items will open a new window.

Year Operation Name Number Type Opening District City County Company Name Railroad Shipments (tons) Railroad to Mine Truck Shipments (tons) Total Production (tons) Days Worked Employees Notes 1923 Clifford   Washery 8   Luzerne Clifford Coal Co. 16,742 Erie 0 17,516 61 41   1924 Clifford   Washery 8   Luzerne Clifford Coal Co. 34,207 Erie 0 34,207 208 22   1925 Clifford   Washery 8   Luzerne Clifford Coal Co. 28,950 Erie 9,320 29,909 170 65   1926 Clifford   Washery 8   Luzerne Clifford Coal Co. 65,602 Erie 0 69,602 222 116   1927 Clifford   Washery 7   Luzerne Clifford Coal Co. 21,094 Erie 0 21,586 250 157   1928 Clifford   Stripping 7   Luzerne Clifford Coal Co. 11,000 Erie 0 11,870 290 16 Coal prepared by Kingston Coal Co. 1928 Clifford   Washery 7   Luzerne Clifford Coal Co. 27,429 Erie 0 31,215 200 35 Coal prepared from refuse of No. 9 and Underwood Collieries, Pennsylvania Coal Co. 1929 M&M   Washery 7   Luzerne M. & M. Coal Co. 54,000 Erie 0 54,000 235 38   1930 Clifford   Washery 7   Luzerne M. & M. Coal Co. 78,071 Erie 0 81,887 242 36   1931 M&M   Washery 7   Luzerne Clover Coal Co. 22,843 0 26,568 184 55   1932 M&M   Washery 7   Luzerne Clover Coal Co. 69,525 0 70,075 296 40 Coal reclaimed from banks. 1933 M&M   Washery 7   Luzerne Clover Coal Co. 10,300 0 10,650 71   Coal reclaimed from banks. 1933 M&M   Washery 7   Luzerne Harrison Coal Co. 35,539 3,845 39,784 139 28 Formerly Clover Coal Co. 1934 Clifford   Washery 7   Luzerne Harrison Coal Co. 68,538 3,722 72,770 309 37   1935 Clifford   Washery 7   Luzerne Harrison Coal Co. 84,597 0 85,757 290 24