# Relationship history for MSHA mine 1510810

Current hierarchy: **Baker Jimmy Ray-Ray & Elder Jr → B & B Coal Company → No 1 Ug**

- 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 & B Coal Company → No 1 Ug; 1977-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Baker Jimmy Ray-Ray & Elder Jr → No 1 Ug; 1977-10-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Baker Jimmy Ray-Ray & Elder Jr → B & B Coal Company; 1977-10-01 to current/open; source msha-controller-operator-history