|'''Return of InvestmentProfit/MinHour'''|| 2.133...%$576
|-
|'''Return of Investment/Min'''|| 2.4%|-|'''True Return of Investment/Min'''|| 2.133...4% |-!colspan="2"| Aliases|-|colspan="2" | coal mine, coalmine
|}
[[Category:Facility]]
The coal mine is a facility that produces 8x [[coal]] every 10 seconds.this is best budget option for high profit in early games. it also works very well in mid until late game for Coal Power Plant. == Related facilities =='''As Building Material'''*[[Tree farm]] '''As input'''*[[Steel mill]]*[[Coal power plant]] == Related Blueprint ==*[[coal detector]]*[[mining specialization]]