# Relationship history for MSHA mine 4002770

Current hierarchy: **Saylors Terry → Saylors Mining Inc → No 44**

- 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

- **operator_operates_mine:** Hickory Coal Company → No 44; 1982-08-01 to 1983-11-29; source msha-controller-operator-history
- **controller_controls_mine:** Thomas Virgil C Et Al → No 44; 1982-08-01 to 1983-11-29; source msha-controller-operator-history
- **controller_controls_operator:** Thomas Virgil C Et Al → Hickory Coal Company; 1982-08-01 to 1983-11-29; source msha-controller-operator-history
- **operator_operates_mine:** Hickory Coal Company Inc → No 44; 1983-11-30 to 1985-01-22; source msha-controller-operator-history
- **controller_controls_mine:** Smith Peggy C → No 44; 1983-11-30 to 1985-01-22; source msha-controller-operator-history
- **controller_controls_operator:** Smith Peggy C → Hickory Coal Company Inc; 1983-11-30 to 1985-01-22; source msha-controller-operator-history
- **controller_controls_mine:** Higgins Daniel → No 44; 1984-01-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Griffith Creek Coal Inc → No 44; 1985-01-23 to 1988-11-22; source msha-controller-operator-history
- **controller_controls_mine:** Miller Eddie → No 44; 1985-01-23 to 1988-11-22; source msha-controller-operator-history
- **controller_controls_operator:** Miller Eddie → Griffith Creek Coal Inc; 1985-01-23 to 1988-11-22; source msha-controller-operator-history
- **operator_operates_mine:** Higgins Coal Company Inc → No 44; 1988-11-23 to 1989-01-26; source msha-controller-operator-history
- **controller_controls_operator:** Higgins Daniel → Higgins Coal Company Inc; 1988-11-23 to 1989-01-26; source msha-controller-operator-history
- **operator_operates_mine:** Mc Gowan Coal Company Inc → No 44; 1989-01-27 to 1990-08-05; source msha-controller-operator-history
- **controller_controls_mine:** Mc Gowan Anthony → No 44; 1989-01-27 to 1990-08-05; source msha-controller-operator-history
- **controller_controls_operator:** Mc Gowan Anthony → Mc Gowan Coal Company Inc; 1989-01-27 to 1990-08-05; source msha-controller-operator-history
- **operator_operates_mine:** Saylors Mining Inc → No 44; 1990-08-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Saylors Terry → No 44; 1990-08-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Saylors Terry → Saylors Mining Inc; 1990-08-06 to current/open; source msha-controller-operator-history