# Relationship history for MSHA mine 0101433

Current hierarchy: **Buzbee Orlin → Buzbee Coal Company Inc → No 1 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:** Buzbee Coal Company Inc → No 1 Strip; 1975-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Buzbee Orlin → No 1 Strip; 1975-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Buzbee Orlin → Buzbee Coal Company Inc; 1975-09-01 to current/open; source msha-controller-operator-history