# Relationship history for MSHA mine 1511791

Current hierarchy: **Bray Robert & Mack Gabbard → B & G Mining Inc → B And B Green Valley Mine**

- 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 & G Mining Inc → B And B Green Valley Mine; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Bray Robert & Mack Gabbard → B And B Green Valley Mine; 1979-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bray Robert & Mack Gabbard → B & G Mining Inc; 1979-01-01 to current/open; source msha-controller-operator-history