# Relationship history for MSHA mine 1517407

Current hierarchy: **Conroy  Coleman → C & L Coal Company Inc → No 4**

- 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:** Conroy  Coleman  et al → No 4; 1987-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roger  Hunter → No 4; 1990-11-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hunter Mining Inc → No 4; 1993-06-01 to 1994-09-20; source msha-controller-operator-history
- **controller_controls_operator:** Roger  Hunter → Hunter Mining Inc; 1993-06-01 to 1994-09-20; source msha-controller-operator-history
- **operator_operates_mine:** C & L Coal Company Inc → No 4; 1994-09-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Conroy  Coleman  et al → C & L Coal Company Inc; 1994-09-21 to current/open; source msha-controller-operator-history