| 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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| 1940 | Dial Rock | | Colliery | Slope 1 | 9 | | Luzerne | Sleepy Hollow Coal Co. | 0 | Truck 1 | 200 | 200 | 193 | 10 | New opening leased from Dial Rock Coal Co. | | 1941 | Sleepy Hollow | | Mine | | 9 | | Luzerne | Sleepy Hollow Coal Co. | 0 | Truck 1 | 15,238 | 15,238 | 277 | 21 | May be at Red Ash? | | 1942 | Red Ash | | Mine | Slope | 9 | Wilkes-Barre 1 | Luzerne | Sleepy Hollow Coal Co. | 3,629 | | 191 | 3,820 | 181 | 16 | Coal prepared at Dial Rock Colliery. |
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