# Relationship history for MSHA mine 1516589

Current hierarchy: **Pendleton Eugene → Mountain Ridge Mining Inc → 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

- **operator_operates_mine:** Galaxy Coal Company Inc → No 2; 1989-03-01 to 1989-07-24; source msha-controller-operator-history
- **controller_controls_mine:** Danny  Turner → No 2; 1989-03-01 to 1990-04-11; source msha-controller-operator-history
- **controller_controls_operator:** Danny  Turner → Galaxy Coal Company Inc; 1989-03-01 to 1989-07-24; source msha-controller-operator-history
- **controller_controls_mine:** Pendleton Eugene → No 2; 1989-03-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mountain Ridge Mining Inc → No 2; 1989-07-25 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pendleton Eugene → Mountain Ridge Mining Inc; 1989-07-25 to current/open; source msha-controller-operator-history