# Relationship history for MSHA mine 1516774

Current hierarchy: **Winn Jerry E → Winn Construction Company Inc → Buford Mine**

- 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:** Anne  Hoke et al → Buford Mine; 1974-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Winn Jerry E → Buford Mine; 1978-03-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Winn Construction Company Inc → Buford Mine; 1989-10-01 to 1992-02-26; source msha-controller-operator-history
- **controller_controls_operator:** Winn Jerry E → Winn Construction Company Inc; 1989-10-01 to 1992-02-26; source msha-controller-operator-history
- **controller_controls_mine:** Lloyd John M → Buford Mine; 1991-08-20 to 1993-10-14; source msha-controller-operator-history
- **operator_operates_mine:** Hoke Company Inc → Buford Mine; 1992-02-27 to 1993-01-20; source msha-controller-operator-history
- **controller_controls_operator:** Anne  Hoke et al → Hoke Company Inc; 1992-02-27 to 1993-01-20; source msha-controller-operator-history
- **controller_controls_operator:** Charles  Hoke et al → Hoke Company Inc; 1992-02-27 to 1993-01-20; source msha-controller-operator-history
- **operator_operates_mine:** Mesa Coals Inc → Buford Mine; 1993-01-21 to 1993-10-14; source msha-controller-operator-history
- **controller_controls_operator:** Lloyd John M → Mesa Coals Inc; 1993-01-21 to 1993-10-14; source msha-controller-operator-history
- **operator_operates_mine:** Mesa Coals Inc → Buford Mine; 1993-10-15 to 1994-08-08; source msha-controller-operator-history
- **controller_controls_mine:** Thunderbird Energy Inc → Buford Mine; 1993-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Thunderbird Energy Inc → Mesa Coals Inc; 1993-10-15 to 1994-08-08; source msha-controller-operator-history
- **operator_operates_mine:** Winn Construction Company Inc → Buford Mine; 1994-08-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Winn Jerry E → Winn Construction Company Inc; 1994-08-09 to current/open; source msha-controller-operator-history