# Relationship history for MSHA mine 4403664

Current hierarchy: **Looney Douglas → Looney Coal Corp → No 1 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

- **controller_controls_mine:** B Ray  Thompson → No 1 Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Winston Mining Company → No 1 Mine; 1974-06-01 to 1977-08-14; source msha-controller-operator-history
- **controller_controls_operator:** B Ray  Thompson → Winston Mining Company; 1974-06-01 to 1977-08-14; source msha-controller-operator-history
- **operator_operates_mine:** Pioneer Coal Corp → No 1 Mine; 1977-08-15 to 1979-08-12; source msha-controller-operator-history
- **controller_controls_mine:** Collins Ted → No 1 Mine; 1977-08-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Collins Ted → Pioneer Coal Corp; 1977-08-15 to 1979-08-12; source msha-controller-operator-history
- **operator_operates_mine:** Looney Coal Corp → No 1 Mine; 1979-08-13 to 1985-06-11; source msha-controller-operator-history
- **controller_controls_mine:** Looney Howard D → No 1 Mine; 1979-08-13 to 1985-06-11; source msha-controller-operator-history
- **controller_controls_operator:** Looney Howard D → Looney Coal Corp; 1979-08-13 to 1985-06-11; source msha-controller-operator-history
- **operator_operates_mine:** Looney Coal Corp → No 1 Mine; 1985-06-12 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Looney Douglas → No 1 Mine; 1985-06-12 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Looney Douglas → Looney Coal Corp; 1985-06-12 to current/open; source msha-controller-operator-history