# Relationship history for MSHA mine 2401747

Current hierarchy: **Westmoreland Mining Holdings LLC → Westmoreland Rosebud Mining LLC → Rosebud Mine & Crusher/Conveyor**

- 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:** Montana Power Company → Rosebud Mine & Crusher/Conveyor; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Western Energy Company → Rosebud Mine & Crusher/Conveyor; 1983-10-01 to 2001-04-29; source msha-controller-operator-history
- **controller_controls_operator:** Montana Power Company → Western Energy Company; 1983-10-01 to 2001-04-29; source msha-controller-operator-history
- **operator_operates_mine:** Westmoreland Rosebud Mining LLC → Rosebud Mine & Crusher/Conveyor; 2001-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Westmoreland Coal Company → Rosebud Mine & Crusher/Conveyor; 2001-04-30 to 2019-03-14; source msha-controller-operator-history
- **controller_controls_operator:** Westmoreland Coal Company → Westmoreland Rosebud Mining LLC; 2001-04-30 to 2019-03-14; source msha-controller-operator-history
- **controller_controls_mine:** Westmoreland Mining Holdings LLC → Rosebud Mine & Crusher/Conveyor; 2019-03-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Westmoreland Mining Holdings LLC → Westmoreland Rosebud Mining LLC; 2019-03-15 to current/open; source msha-controller-operator-history