# Relationship history for MSHA mine 4405081

Current hierarchy: **Westmoreland Coal Company → Westmoreland Coal Company → Roaring Fork Mine**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Westmoreland Coal Company → Roaring Fork Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jessee Bill W → Roaring Fork Mine; 1977-03-03 to 1992-04-01; source msha-controller-operator-history
- **operator_operates_mine:** Lee-Man Mining Inc → Roaring Fork Mine; 1978-08-01 to 1989-02-19; source msha-controller-operator-history
- **controller_controls_operator:** Jessee Bill W → Lee-Man Mining Inc; 1978-08-01 to 1989-02-19; source msha-controller-operator-history
- **operator_operates_mine:** Westmoreland Coal Company → Roaring Fork Mine; 1989-02-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Westmoreland Coal Company → Westmoreland Coal Company; 1989-02-20 to current/open; source msha-controller-operator-history