# Relationship history for MSHA mine 4002868

Current hierarchy: **Reeves Terry C → American Standard Coal Sales Inc → Mine #8**

- 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:** Harris Johnny → Mine #8; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** H & W Coal Company → Mine #8; 1984-12-01 to 1985-05-05; source msha-controller-operator-history
- **controller_controls_operator:** Harris Johnny → H & W Coal Company; 1984-12-01 to 1985-05-05; source msha-controller-operator-history
- **operator_operates_mine:** R & J Coal Company → Mine #8; 1985-05-06 to 1985-06-18; source msha-controller-operator-history
- **controller_controls_mine:** Phillips Rickey → Mine #8; 1985-05-06 to 1985-06-18; source msha-controller-operator-history
- **controller_controls_operator:** Phillips Rickey → R & J Coal Company; 1985-05-06 to 1985-06-18; source msha-controller-operator-history
- **operator_operates_mine:** American Standard Coal Sales Inc → Mine #8; 1985-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Reeves Terry C → Mine #8; 1985-06-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Reeves Terry C → American Standard Coal Sales Inc; 1985-06-19 to current/open; source msha-controller-operator-history