# Relationship history for MSHA mine 4001799

Current hierarchy: **Bradley Equipment Company Inc → Abc Mining 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Asbury Harold F Et Al → No 4; 1975-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Dan Branch Mining Company Inc → No 4; 1975-07-01 to 1985-06-11; source msha-controller-operator-history
- **controller_controls_operator:** Asbury Harold F Et Al → Dan Branch Mining Company Inc; 1975-07-01 to 1985-06-11; source msha-controller-operator-history
- **controller_controls_mine:** Bradley Equipment Company Inc → No 4; 1985-01-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** J & C Coal Corp → No 4; 1985-06-12 to 1987-09-20; source msha-controller-operator-history
- **controller_controls_operator:** Bradley Equipment Company Inc → J & C Coal Corp; 1985-06-12 to 1987-09-20; source msha-controller-operator-history
- **controller_controls_mine:** Evans Billy P → No 4; 1987-03-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** B & A Coals → No 4; 1987-09-21 to 1988-09-28; source msha-controller-operator-history
- **controller_controls_operator:** Evans Billy P → B & A Coals; 1987-09-21 to 1988-09-28; source msha-controller-operator-history
- **controller_controls_mine:** Bradley Equipment Company Inc → No 4; 1988-05-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Abc Mining Company Inc → No 4; 1988-09-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bradley Equipment Company Inc → Abc Mining Company Inc; 1988-09-29 to current/open; source msha-controller-operator-history