# Relationship history for MSHA mine 4404632

Current hierarchy: **Hackney Frank W → M P & M Coal Company Inc → Mine No 2**

- 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:** Hurley Sam & Bobby Justus → Mine No 2; 1976-12-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Malachi Coal Company Inc → Mine No 2; 1977-02-01 to 1978-05-03; source msha-controller-operator-history
- **controller_controls_operator:** Hurley Sam & Bobby Justus → Malachi Coal Company Inc; 1977-02-01 to 1978-05-03; source msha-controller-operator-history
- **operator_operates_mine:** Custom Energy Inc → Mine No 2; 1978-05-04 to 1978-07-17; source msha-controller-operator-history
- **controller_controls_mine:** Mc Coy Verlin → Mine No 2; 1978-05-04 to 1978-07-17; source msha-controller-operator-history
- **controller_controls_operator:** Mc Coy Verlin → Custom Energy Inc; 1978-05-04 to 1978-07-17; source msha-controller-operator-history
- **operator_operates_mine:** Hagy Coal Company → Mine No 2; 1978-07-18 to 1979-06-12; source msha-controller-operator-history
- **controller_controls_mine:** Potter Clayton & Larry May → Mine No 2; 1978-07-18 to 1979-06-12; source msha-controller-operator-history
- **controller_controls_operator:** Potter Clayton & Larry May → Hagy Coal Company; 1978-07-18 to 1979-06-12; source msha-controller-operator-history
- **operator_operates_mine:** D J & C Coal Company Inc → Mine No 2; 1979-06-13 to 1983-05-25; source msha-controller-operator-history
- **controller_controls_mine:** Crumb Jack → Mine No 2; 1979-06-13 to 1983-05-25; source msha-controller-operator-history
- **controller_controls_operator:** Crumb Jack → D J & C Coal Company Inc; 1979-06-13 to 1983-05-25; source msha-controller-operator-history
- **controller_controls_mine:** Cole Bobby J & Ralph J Lester → Mine No 2; 1980-06-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hackney Frank W → Mine No 2; 1981-10-21 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Travis Coal Company → Mine No 2; 1983-05-26 to 1985-04-08; source msha-controller-operator-history
- **controller_controls_mine:** Richardson Dowell → Mine No 2; 1983-05-26 to 1985-04-08; source msha-controller-operator-history
- **controller_controls_operator:** Richardson Dowell → Travis Coal Company; 1983-05-26 to 1985-04-08; source msha-controller-operator-history
- **operator_operates_mine:** T & J Coal Company Inc → Mine No 2; 1985-04-09 to 1987-03-16; source msha-controller-operator-history
- **controller_controls_mine:** Keene Jack R Et Al → Mine No 2; 1985-04-09 to 1987-03-16; source msha-controller-operator-history
- **controller_controls_operator:** Keene Jack R Et Al → T & J Coal Company Inc; 1985-04-09 to 1987-03-16; source msha-controller-operator-history
- **operator_operates_mine:** Big Boot Mining Company Inc → Mine No 2; 1987-03-17 to 1989-04-11; source msha-controller-operator-history
- **controller_controls_operator:** Cole Bobby J & Ralph J Lester → Big Boot Mining Company Inc; 1987-03-17 to 1989-04-11; source msha-controller-operator-history
- **operator_operates_mine:** M P & M Coal Company Inc → Mine No 2; 1989-04-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hackney Frank W → M P & M Coal Company Inc; 1989-04-12 to current/open; source msha-controller-operator-history