# Relationship history for MSHA mine 1517548

Current hierarchy: **George W  Givens Jr → Givens Coal Company Inc → Mine No 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:** George W  Givens Jr → Mine No 2; 1973-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Barnwell Darrell G → Mine No 2; 1989-05-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Alpha Mining Company → Mine No 2; 1994-05-01 to 1995-05-08; source msha-controller-operator-history
- **controller_controls_operator:** Barnwell Darrell G → Alpha Mining Company; 1994-05-01 to 1995-05-08; source msha-controller-operator-history
- **operator_operates_mine:** Givens Coal Company Inc → Mine No 2; 1995-05-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** George W  Givens Jr → Givens Coal Company Inc; 1995-05-09 to current/open; source msha-controller-operator-history