# Relationship history for MSHA mine 0101900

Current hierarchy: **Mobley Jerry → Bear Creek Coal Company Inc → Bear Creek Pit 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Bear Creek Coal Company Inc → Bear Creek Pit No 1; 1978-07-01 to 1979-10-28; source msha-controller-operator-history
- **controller_controls_mine:** Sumner Hugh → Bear Creek Pit No 1; 1978-07-01 to 1979-10-28; source msha-controller-operator-history
- **controller_controls_operator:** Sumner Hugh → Bear Creek Coal Company Inc; 1978-07-01 to 1979-10-28; source msha-controller-operator-history
- **operator_operates_mine:** Bear Creek Coal Company Inc → Bear Creek Pit No 1; 1979-10-29 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mobley Jerry → Bear Creek Pit No 1; 1979-10-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mobley Jerry → Bear Creek Coal Company Inc; 1979-10-29 to current/open; source msha-controller-operator-history