# Relationship history for MSHA mine 4605097

Current hierarchy: **Rex  Fought → Tim Rex Mining → Alma#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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Metallurgical Coal & Coke Inc → Alma#1; 1976-03-01 to 1979-04-10; source msha-controller-operator-history
- **controller_controls_mine:** Trent Bill → Alma#1; 1976-03-01 to 1979-04-10; source msha-controller-operator-history
- **controller_controls_operator:** Trent Bill → Metallurgical Coal & Coke Inc; 1976-03-01 to 1979-04-10; source msha-controller-operator-history
- **operator_operates_mine:** Bituminous Realty Inc → Alma#1; 1979-04-11 to 1980-08-26; source msha-controller-operator-history
- **controller_controls_mine:** Wolford Rabon A → Alma#1; 1979-04-11 to 1980-08-26; source msha-controller-operator-history
- **controller_controls_operator:** Wolford Rabon A → Bituminous Realty Inc; 1979-04-11 to 1980-08-26; source msha-controller-operator-history
- **operator_operates_mine:** Cumberland Village Mining Group Inc → Alma#1; 1980-08-27 to 1983-04-18; source msha-controller-operator-history
- **controller_controls_mine:** Cummings Thomas → Alma#1; 1980-08-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cummings Thomas → Cumberland Village Mining Group Inc; 1980-08-27 to 1983-04-18; source msha-controller-operator-history
- **operator_operates_mine:** Wheeling Mining Company Inc → Alma#1; 1983-04-19 to 1983-07-05; source msha-controller-operator-history
- **controller_controls_mine:** Workman William F → Alma#1; 1983-04-19 to 1983-07-05; source msha-controller-operator-history
- **controller_controls_operator:** Workman William F → Wheeling Mining Company Inc; 1983-04-19 to 1983-07-05; source msha-controller-operator-history
- **operator_operates_mine:** B J & B Coal Corp → Alma#1; 1983-07-06 to 1984-12-05; source msha-controller-operator-history
- **controller_controls_mine:** Hackney Buford-John R Lark Et Al → Alma#1; 1983-07-06 to 1984-12-05; source msha-controller-operator-history
- **controller_controls_operator:** Hackney Buford-John R Lark Et Al → B J & B Coal Corp; 1983-07-06 to 1984-12-05; source msha-controller-operator-history
- **controller_controls_mine:** Rex  Fought → Alma#1; 1984-08-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Burton Coal Company Inc → Alma#1; 1984-12-06 to 1985-06-25; source msha-controller-operator-history
- **controller_controls_mine:** Burton Bill → Alma#1; 1984-12-06 to 1985-10-04; source msha-controller-operator-history
- **controller_controls_operator:** Burton Bill → Burton Coal Company Inc; 1984-12-06 to 1985-06-25; source msha-controller-operator-history
- **operator_operates_mine:** Tim Rex Mining → Alma#1; 1985-06-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rex  Fought → Tim Rex Mining; 1985-06-26 to current/open; source msha-controller-operator-history