# Relationship history for MSHA mine 0500307

Current hierarchy: **Asher James D → Coal Operating Company → Eagle Mine**

- 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:** Imperial Coal Company → Eagle Mine; 1950-01-01 to 1978-03-31; source msha-controller-operator-history
- **controller_controls_mine:** Brennan George → Eagle Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brennan George → Imperial Coal Company; 1950-01-01 to 1978-03-31; source msha-controller-operator-history
- **operator_operates_mine:** Coal Operating Company → Eagle Mine; 1978-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Asher James D → Eagle Mine; 1978-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Asher James D → Coal Operating Company; 1978-04-01 to current/open; source msha-controller-operator-history