# Relationship history for MSHA mine 4405541

Current hierarchy: **Jackson Rick → Shenandoah Coal Company Inc → No 1**

- 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:** Jackson Harold → No 1; 1977-08-15 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Little Egypt Coal Company Inc → No 1; 1980-10-01 to 1988-04-11; source msha-controller-operator-history
- **controller_controls_operator:** Jackson Harold → Little Egypt Coal Company Inc; 1980-10-01 to 1988-04-11; source msha-controller-operator-history
- **operator_operates_mine:** Shenandoah Coal Company Inc → No 1; 1988-04-12 to 1988-12-14; source msha-controller-operator-history
- **controller_controls_mine:** Ashby James M Et Al → No 1; 1988-04-12 to 1988-12-14; source msha-controller-operator-history
- **controller_controls_operator:** Ashby James M Et Al → Shenandoah Coal Company Inc; 1988-04-12 to 1988-12-14; source msha-controller-operator-history
- **operator_operates_mine:** Shenandoah Coal Company Inc → No 1; 1988-12-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jackson Rick → No 1; 1988-12-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jackson Rick → Shenandoah Coal Company Inc; 1988-12-15 to current/open; source msha-controller-operator-history