# Relationship history for MSHA mine 1517474

Current hierarchy: **Crook Marion S & Barbara Taylor → Beech Creek Energy Inc → Beech Creek #1 Auger**

- 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:** Crook Marion S & Barbara Taylor → Beech Creek #1 Auger; 1988-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Paul E  Bryant → Beech Creek #1 Auger; 1990-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Weslo Inc → Beech Creek #1 Auger; 1993-11-01 to 1996-05-09; source msha-controller-operator-history
- **controller_controls_operator:** Paul E  Bryant → Weslo Inc; 1993-11-01 to 1996-05-09; source msha-controller-operator-history
- **operator_operates_mine:** Beech Creek Energy Inc → Beech Creek #1 Auger; 1996-05-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Crook Marion S & Barbara Taylor → Beech Creek Energy Inc; 1996-05-10 to current/open; source msha-controller-operator-history