# Relationship history for MSHA mine 4605708

Current hierarchy: **Altizer Joseph W & Melvin C Nottingham → Rich Eagle Coal Company Inc → No 1 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:** Mc Cann John H & John W Benson → No 1 Mine; 1977-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Appalachian Pocahontas Coal Company Inc → No 1 Mine; 1978-01-01 to 1981-01-12; source msha-controller-operator-history
- **controller_controls_operator:** Mc Cann John H & John W Benson → Appalachian Pocahontas Coal Company Inc; 1978-01-01 to 1981-01-12; source msha-controller-operator-history
- **operator_operates_mine:** Harper Valley Coal Company → No 1 Mine; 1981-01-13 to 1981-05-17; source msha-controller-operator-history
- **controller_controls_mine:** Griffith James E → No 1 Mine; 1981-01-13 to 1981-05-17; source msha-controller-operator-history
- **controller_controls_operator:** Griffith James E → Harper Valley Coal Company; 1981-01-13 to 1981-05-17; source msha-controller-operator-history
- **operator_operates_mine:** Rich Eagle Coal Company Inc → No 1 Mine; 1981-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Altizer Joseph W & Melvin C Nottingham → No 1 Mine; 1981-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Altizer Joseph W & Melvin C Nottingham → Rich Eagle Coal Company Inc; 1981-05-18 to current/open; source msha-controller-operator-history