# Relationship history for MSHA mine 1510001

Current hierarchy: **James A  Comyns → Zephyer Coal Company Inc → No 4**

- 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:** James F  McCoy → No 4; 1975-01-01 to 1980-10-08; source msha-controller-operator-history
- **operator_operates_mine:** Mc Coy Alma Coal Company Inc → No 4; 1976-09-23 to 1980-10-08; source msha-controller-operator-history
- **controller_controls_operator:** James F  McCoy → Mc Coy Alma Coal Company Inc; 1976-09-23 to 1980-10-08; source msha-controller-operator-history
- **operator_operates_mine:** Mc Coy Caney Coal Company → No 4; 1980-10-09 to 1982-06-13; source msha-controller-operator-history
- **controller_controls_mine:** El Paso Energy Corp → No 4; 1980-10-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** El Paso Energy Corp → Mc Coy Caney Coal Company; 1980-10-09 to 1982-06-13; source msha-controller-operator-history
- **operator_operates_mine:** Little Deuce Coal Company Inc → No 4; 1982-06-14 to 1982-11-09; source msha-controller-operator-history
- **controller_controls_mine:** Smith Roger D → No 4; 1982-06-14 to 1982-11-09; source msha-controller-operator-history
- **controller_controls_operator:** Smith Roger D → Little Deuce Coal Company Inc; 1982-06-14 to 1982-11-09; source msha-controller-operator-history
- **operator_operates_mine:** Little Deuce Coal Company Inc → No 4; 1982-11-10 to 1983-03-08; source msha-controller-operator-history
- **controller_controls_mine:** Blackburn Russel E → No 4; 1982-11-10 to 1983-03-08; source msha-controller-operator-history
- **controller_controls_operator:** Blackburn Russel E → Little Deuce Coal Company Inc; 1982-11-10 to 1983-03-08; source msha-controller-operator-history
- **operator_operates_mine:** Little Deuce Coal Company Inc → No 4; 1983-03-09 to 1983-08-10; source msha-controller-operator-history
- **controller_controls_mine:** Lester Roger → No 4; 1983-03-09 to 1983-08-10; source msha-controller-operator-history
- **controller_controls_operator:** Lester Roger → Little Deuce Coal Company Inc; 1983-03-09 to 1983-08-10; source msha-controller-operator-history
- **operator_operates_mine:** Michelle Coal Company Inc → No 4; 1983-08-11 to 1984-11-08; source msha-controller-operator-history
- **controller_controls_mine:** Ratliff Brenda & Neal → No 4; 1983-08-11 to 1984-11-08; source msha-controller-operator-history
- **controller_controls_operator:** Ratliff Brenda & Neal → Michelle Coal Company Inc; 1983-08-11 to 1984-11-08; source msha-controller-operator-history
- **operator_operates_mine:** Mc Coy Caney Coal Company → No 4; 1984-11-09 to 1986-11-09; source msha-controller-operator-history
- **controller_controls_operator:** El Paso Energy Corp → Mc Coy Caney Coal Company; 1984-11-09 to 1986-11-09; source msha-controller-operator-history
- **operator_operates_mine:** Zephyer Coal Company Inc → No 4; 1986-11-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James A  Comyns → No 4; 1986-11-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James A  Comyns → Zephyer Coal Company Inc; 1986-11-10 to current/open; source msha-controller-operator-history