# Relationship history for MSHA mine 0202882

Current hierarchy: **William G  Frank → Bill'S Backhoe Service → BILL'S BACKHOE SERVICE**

- 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:** Bill'S Backhoe Service → BILL'S BACKHOE SERVICE; 2000-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William G  Frank → BILL'S BACKHOE SERVICE; 2000-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William G  Frank → Bill'S Backhoe Service; 2000-05-01 to current/open; source msha-controller-operator-history