# Relationship history for MSHA mine 4002789

Current hierarchy: **Phillips Earl → Devonia Coal Corp → Devonia Coal Corp Mine #5**

- 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:** Phillips Earl → Devonia Coal Corp Mine #5; 1970-01-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Devonia Coal Corp → Devonia Coal Corp Mine #5; 1982-05-01 to 1985-06-18; source msha-controller-operator-history
- **controller_controls_operator:** Phillips Earl → Devonia Coal Corp; 1982-05-01 to 1985-06-18; source msha-controller-operator-history
- **operator_operates_mine:** American Standard Coal Sales Inc → Devonia Coal Corp Mine #5; 1985-06-19 to 1985-10-29; source msha-controller-operator-history
- **controller_controls_mine:** Reeves Terry C → Devonia Coal Corp Mine #5; 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 1985-10-29; source msha-controller-operator-history
- **operator_operates_mine:** Devonia Coal Corp → Devonia Coal Corp Mine #5; 1985-10-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Phillips Earl → Devonia Coal Corp; 1985-10-30 to current/open; source msha-controller-operator-history