# Relationship history for MSHA mine 2302039

Current hierarchy: **George James H & Betty M → Bed Rock Chat & Sand → Navy Bean 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Bed Rock Chat & Sand → Navy Bean Mine; 1991-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** George James H & Betty M Et Al → Navy Bean Mine; 1991-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** George James H & Betty M Et Al → Bed Rock Chat & Sand; 1991-04-01 to current/open; source msha-controller-operator-history