# Relationship history for MSHA mine 0101365

Current hierarchy: **Mc Bride T J → Big Sandy Coal Co Inc → Fleetwood No 2 Strip**

- 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

- **operator_operates_mine:** B & B Coal Co Inc → Fleetwood No 2 Strip; 1975-07-01 to 1976-02-25; source msha-controller-operator-history
- **controller_controls_mine:** Hyche Billy G → Fleetwood No 2 Strip; 1975-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hyche Billy G → B & B Coal Co Inc; 1975-07-01 to 1976-02-25; source msha-controller-operator-history
- **operator_operates_mine:** Big Sandy Coal Co Inc → Fleetwood No 2 Strip; 1976-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mc Bride T J → Fleetwood No 2 Strip; 1976-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Bride T J → Big Sandy Coal Co Inc; 1976-02-26 to current/open; source msha-controller-operator-history