# Relationship history for MSHA mine 4201889

Current hierarchy: **Wolverine Fuels LLC → Canyon Fuel Company Llc → Dugout Canyon Mines**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Sunoco, Inc. → Dugout Canyon Mines; 1982-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sunedco Coal Company → Dugout Canyon Mines; 1983-11-01 to 1995-01-30; source msha-controller-operator-history
- **controller_controls_operator:** Sunoco, Inc. → Sunedco Coal Company; 1983-11-01 to 1995-01-30; source msha-controller-operator-history
- **controller_controls_mine:** El Paso Energy Corp → Dugout Canyon Mines; 1993-09-16 to 1998-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Soldier Creek Coal Company → Dugout Canyon Mines; 1995-01-31 to 1998-05-31; source msha-controller-operator-history
- **controller_controls_operator:** El Paso Energy Corp → Soldier Creek Coal Company; 1995-01-31 to 1998-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Arch Resources Inc → Dugout Canyon Mines; 1996-12-20 to 2013-08-16; source msha-controller-operator-history
- **operator_operates_mine:** Canyon Fuel Company Llc → Dugout Canyon Mines; 1998-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arch Resources Inc → Canyon Fuel Company Llc; 1998-06-01 to 2013-08-16; source msha-controller-operator-history
- **controller_controls_mine:** Wolverine Fuels LLC → Dugout Canyon Mines; 2013-08-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wolverine Fuels LLC → Canyon Fuel Company Llc; 2013-08-17 to current/open; source msha-controller-operator-history