# Relationship history for MSHA mine 4406037

Current hierarchy: **Lester Harold → Coal Dust 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:** Ronald S  Ratliff → Mine No 1; 1978-10-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Triple M Coal Company → Mine No 1; 1984-03-01 to 1984-07-16; source msha-controller-operator-history
- **controller_controls_mine:** Roy  Meadows Sr et al → Mine No 1; 1984-03-01 to 1987-10-04; source msha-controller-operator-history
- **controller_controls_operator:** Roy  Meadows Sr et al → Triple M Coal Company; 1984-03-01 to 1984-07-16; source msha-controller-operator-history
- **operator_operates_mine:** T & R Coal Company Inc → Mine No 1; 1984-07-17 to 1985-01-27; source msha-controller-operator-history
- **controller_controls_operator:** Ronald S  Ratliff → T & R Coal Company Inc; 1984-07-17 to 1985-01-27; source msha-controller-operator-history
- **operator_operates_mine:** Little D Coal Company Inc → Mine No 1; 1985-01-28 to 1986-07-22; source msha-controller-operator-history
- **controller_controls_mine:** Keene Jack R Et Al → Mine No 1; 1985-01-28 to 1986-07-22; source msha-controller-operator-history
- **controller_controls_operator:** Keene Jack R Et Al → Little D Coal Company Inc; 1985-01-28 to 1986-07-22; source msha-controller-operator-history
- **operator_operates_mine:** Coal Dust Coal Company Inc → Mine No 1; 1986-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lester Harold → Mine No 1; 1986-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lester Harold → Coal Dust Coal Company Inc; 1986-07-23 to current/open; source msha-controller-operator-history