# Relationship history for MSHA mine 1516942

Current hierarchy: **Aubra P  Dean; Carl E  McAfee → Triple C Coal Inc → #2**

- 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:** Aubra P  Dean et al → #2; 1989-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Campbell Scott → #2; 1989-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** High Rise Coal Company Inc → #2; 1990-08-01 to 1991-01-16; source msha-controller-operator-history
- **controller_controls_operator:** Campbell Scott → High Rise Coal Company Inc; 1990-08-01 to 1991-01-16; source msha-controller-operator-history
- **operator_operates_mine:** Triple C Coal Inc → #2; 1991-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aubra P  Dean et al → Triple C Coal Inc; 1991-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl E  McAfee et al → Triple C Coal Inc; 1991-01-17 to current/open; source msha-controller-operator-history