# Relationship history for MSHA mine 4605356

Current hierarchy: **Mullens Junior L → Becks Run Coal Company → Big Bull Mine No 1**

- 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:** Rabbit Run Energy Company → Big Bull Mine No 1; 1976-11-11 to 1978-06-21; source msha-controller-operator-history
- **controller_controls_mine:** Glass Leonard → Big Bull Mine No 1; 1976-11-11 to 1978-06-21; source msha-controller-operator-history
- **controller_controls_operator:** Glass Leonard → Rabbit Run Energy Company; 1976-11-11 to 1978-06-21; source msha-controller-operator-history
- **operator_operates_mine:** Rabbit Run Energy Inc → Big Bull Mine No 1; 1978-06-22 to 1980-06-23; source msha-controller-operator-history
- **controller_controls_mine:** Seatrain Energy & Resources Corp → Big Bull Mine No 1; 1978-06-22 to 1980-06-23; source msha-controller-operator-history
- **controller_controls_operator:** Seatrain Energy & Resources Corp → Rabbit Run Energy Inc; 1978-06-22 to 1980-06-23; source msha-controller-operator-history
- **operator_operates_mine:** Becks Run Coal Company → Big Bull Mine No 1; 1980-06-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mullens Junior L → Big Bull Mine No 1; 1980-06-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mullens Junior L → Becks Run Coal Company; 1980-06-24 to current/open; source msha-controller-operator-history