# Relationship history for MSHA mine 4604723

Current hierarchy: **Larry B  McKinney → Rhino Mining Inc → East Gulf No 4 Belt Tunnel**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** Westmoreland Coal Company → East Gulf No 4 Belt Tunnel; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Westmoreland Coal Company → East Gulf No 4 Belt Tunnel; 1975-01-01 to 1982-06-03; source msha-controller-operator-history
- **controller_controls_operator:** Westmoreland Coal Company → Westmoreland Coal Company; 1975-01-01 to 1982-06-03; source msha-controller-operator-history
- **operator_operates_mine:** East Gulf Fuel Corp → East Gulf No 4 Belt Tunnel; 1982-06-04 to 1997-03-09; source msha-controller-operator-history
- **controller_controls_mine:** Henry Paul  Kizer et al → East Gulf No 4 Belt Tunnel; 1982-06-04 to 1997-03-09; source msha-controller-operator-history
- **controller_controls_operator:** Henry Paul  Kizer et al → East Gulf Fuel Corp; 1982-06-04 to 1997-03-09; source msha-controller-operator-history
- **controller_controls_mine:** Timothy L  McCoy → East Gulf No 4 Belt Tunnel; 1984-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mate Creek Loading Inc → East Gulf No 4 Belt Tunnel; 1997-03-10 to 1999-02-01; source msha-controller-operator-history
- **controller_controls_operator:** Timothy L  McCoy → Mate Creek Loading Inc; 1997-03-10 to 1999-02-01; source msha-controller-operator-history
- **operator_operates_mine:** Rhino Mining Inc → East Gulf No 4 Belt Tunnel; 1999-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Larry B  McKinney → East Gulf No 4 Belt Tunnel; 1999-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry B  McKinney → Rhino Mining Inc; 1999-02-02 to current/open; source msha-controller-operator-history