# Relationship history for MSHA mine 3609463

Current hierarchy: **Charlene A Barry → BILL BARRY EXCAVATING INC → CRESCO QUARRY**

- 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:** Bill Barry Excavating Inc → CRESCO QUARRY; 2006-08-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William G  Barry → CRESCO QUARRY; 2006-08-03 to 2022-02-07; source msha-controller-operator-history
- **controller_controls_operator:** William G  Barry → Bill Barry Excavating Inc; 2006-08-03 to 2022-02-07; source msha-controller-operator-history
- **controller_controls_mine:** Charlene A Barry → CRESCO QUARRY; 2022-02-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Charlene A Barry → Bill Barry Excavating Inc; 2022-02-08 to current/open; source msha-controller-operator-history