# Relationship history for MSHA mine 4405502

Current hierarchy: **Pittston Company → Sea B Mining Company → Shenandoah Mine**

- 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:** Pittston Company → Shenandoah Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Regina Coal Corp → Shenandoah Mine; 1980-09-01 to 1989-09-05; source msha-controller-operator-history
- **controller_controls_mine:** William P  Harris et al → Shenandoah Mine; 1980-09-01 to 1989-09-05; source msha-controller-operator-history
- **controller_controls_operator:** William P  Harris et al → Regina Coal Corp; 1980-09-01 to 1989-09-05; source msha-controller-operator-history
- **controller_controls_mine:** Jackson Rick → Shenandoah Mine; 1988-12-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gilliam Charles Jr → Shenandoah Mine; 1989-08-22 to 1992-06-07; source msha-controller-operator-history
- **operator_operates_mine:** Malachi Mining Inc → Shenandoah Mine; 1989-09-06 to 1992-06-07; source msha-controller-operator-history
- **controller_controls_operator:** Gilliam Charles Jr → Malachi Mining Inc; 1989-09-06 to 1992-06-07; source msha-controller-operator-history
- **operator_operates_mine:** Shenandoah Coal Company Inc → Shenandoah Mine; 1992-06-08 to 1994-10-23; source msha-controller-operator-history
- **controller_controls_operator:** Jackson Rick → Shenandoah Coal Company Inc; 1992-06-08 to 1994-10-23; source msha-controller-operator-history
- **operator_operates_mine:** Sea B Mining Company → Shenandoah Mine; 1994-10-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pittston Company → Sea B Mining Company; 1994-10-24 to current/open; source msha-controller-operator-history