# Relationship history for MSHA mine 4405059

Current hierarchy: **James Wayne  Estep → Estep Coal Company Inc → Mine No 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

- **controller_controls_mine:** Merritt Jerry L → Mine No 1; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Farwest Coal Company → Mine No 1; 1978-06-01 to 1979-05-31; source msha-controller-operator-history
- **controller_controls_operator:** Merritt Jerry L → Farwest Coal Company; 1978-06-01 to 1979-05-31; source msha-controller-operator-history
- **operator_operates_mine:** M & T Coal Company Inc → Mine No 1; 1979-06-01 to 1981-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Tommy Joe  Owens → Mine No 1; 1979-06-01 to 1981-07-14; source msha-controller-operator-history
- **controller_controls_operator:** Tommy Joe  Owens → M & T Coal Company Inc; 1979-06-01 to 1981-07-14; source msha-controller-operator-history
- **operator_operates_mine:** Estep Coal Company Inc → Mine No 1; 1981-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** James Wayne  Estep → Mine No 1; 1981-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** James Wayne  Estep → Estep Coal Company Inc; 1981-07-15 to current/open; source msha-controller-operator-history