# Relationship history for MSHA mine 4602493

Current hierarchy: **Henry Paul  Kizer → Quinland Coals Inc → Quinland No 1**

- 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

- **operator_operates_mine:** Westmoreland Coal Company → Quinland No 1; 1950-01-01 to 1984-05-14; source msha-controller-operator-history
- **controller_controls_mine:** Westmoreland Coal Company → Quinland No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Westmoreland Coal Company → Westmoreland Coal Company; 1950-01-01 to 1984-05-14; source msha-controller-operator-history
- **operator_operates_mine:** Quinland Coals Inc → Quinland No 1; 1984-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Henry Paul  Kizer et al → Quinland No 1; 1984-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Henry Paul  Kizer et al → Quinland Coals Inc; 1984-05-15 to current/open; source msha-controller-operator-history