| Business | Phone |
| Cogema Mining Inc 932 Black Yellow Rd, Gillette 82718 | (307) 464-1427 |
| Cordero Rojo Complex 748 T-7 Rd, Gillette 82718 | (307) 682-8005 |
| Rag Coal West Inc 10023 N Us Hwy 14-16, Gillette 82716 | (307) 687-3300 |
| Moore Mining 2708 Cascade Ct, Gillette 82718 | (307) 687-0299 |
| Western Fuels Assn Inc 2201 S Douglas Hwy, Gillette 82718 | (307) 682-8051 |
| Washington Group Intl 113 S Gillette Ave, Gillette 82716 | (307) 686-5034 |