# Relationship history for MSHA mine 0101861

Current hierarchy: **Sartin George → B & R Coal Company Inc → Gallion Branch #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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** B & R Coal Company Inc → Gallion Branch #1 Strip; 1978-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sartin George → Gallion Branch #1 Strip; 1978-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sartin George → B & R Coal Company Inc; 1978-04-01 to current/open; source msha-controller-operator-history