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 |
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1922 | Stillwater | | Colliery | Drift 1 | 1 | Forest City 1 | Susquehanna | Clifford Coal Co. | 11,326 | Erie | 0 | 12,527 | 149 | 56 | | 1923 | Clifford | | Washery | | 8 | | Luzerne | Clifford Coal Co. | 16,742 | Erie | 0 | 17,516 | 61 | 41 | | 1923 | Stillwater | | Colliery | Drift 1 | 1 | Forest City 1 | Susquehanna | Clifford Coal Co. | 37,243 | Erie | 0 | 37,456 | 279 | 90 | | 1924 | Clifford | | Washery | | 8 | | Luzerne | Clifford Coal Co. | 34,207 | Erie | 0 | 34,207 | 208 | 22 | | 1924 | Stillwater | | Colliery | Drift 1 | 1 | Forest City 1 | Susquehanna | Clifford Coal Co. | 21,884 | Erie | 0 | 21,899 | 286 | 63 | | 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 | | 1926 | Stillwater | | Colliery | Drift 1 | 1 | Forest City 1 | Susquehanna | Clifford Coal Co. | 13,923 | | 0 | 13,943 | 190 | 41 | Coal prepared at Clifford Breaker, Avoca. | 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. |
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