# Relationship history for MSHA mine 4300822

Current hierarchy: **Buck  Adams → ADAMS GRAVEL, INC. → BRIDGMAN 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

- **controller_controls_mine:** Michael J  Renaud → BRIDGMAN QUARRY; 2014-10-20 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Renaud Gravel Inc → BRIDGMAN QUARRY; 2023-11-30 to 2025-02-20; source msha-controller-operator-history
- **controller_controls_operator:** Michael J  Renaud → Renaud Gravel Inc; 2023-11-30 to 2025-02-20; source msha-controller-operator-history
- **operator_operates_mine:** ADAMS GRAVEL, INC. → BRIDGMAN QUARRY; 2025-02-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Buck  Adams → BRIDGMAN QUARRY; 2025-02-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Buck  Adams → ADAMS GRAVEL, INC.; 2025-02-21 to current/open; source msha-controller-operator-history