Coal mine
| Cost | $450 |
| Inputs | N/A |
| Outputs | 8x coal |
| Production interval | 10 seconds |
| Profit/Min | $9.60 |
| True Profit/Min | $9.60 |
| Return of Investment/Min | 2.133...% |
| True Return of Investment/Min | 2.133...% |
The coal mine is a facility that produces 8x coal every 10 seconds. Can be used to produce energy with coal power plant coal power plant
