| 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 |
|---|
| 1941 | Umber | | Mine | | 2 | | Lackawanna | Umber Coal Co. | 1,313 | | 0 | 1,551 | 89 | 13 | New operation. |
| 1942 | Umber | | Mine | | 2 | | Lackawanna | Umber Coal Co. | 4,467 | | 0 | 5,284 | 167 | 13 | New operation. |
| 1943 | Umber | | Mine | | 1 | | Lackawanna | Umber Coal Co. | 4,917 | | 0 | 4,917 | 294 | 8 | Run of mine coal. Transferred from District 2. |
| 1944 | Umber | | Mine | | 1 | | Lackawanna | Umber Coal Co. | 7,084 | | 0 | 7,084 | 308 | 9 | Run of mine coal. |
| 1945 | Umber | | Mine | | 1 | | Lackawanna | Umber Coal Co. | 7,399 | | 0 | 1,399 | 287 | 10 | Run of mine coal. |
| 1946 | Umber | | Mine | | 1 | | Lackawanna | Umber Coal Co. | 8,143 | | 0 | 8,143 | 271 | 9 | Coal prepared at Simoncelli & Von Storch breakers. |
| 1947 | Umber | | Mine | | 1 | | Lackawanna | Umber Coal Co. | 1,850 | | 0 | 1,850 | 75 | 10 | Coal prepared at Simoncelli Breaker. |