# Relationship history for MSHA mine 2401545

Current hierarchy: **Giguere Charles → Giguere Industries Inc → Washington Gulch 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:** Brazill Mining → Washington Gulch Mine; 1980-06-01 to 1983-05-17; source msha-controller-operator-history
- **controller_controls_mine:** Brazill George & Duane → Washington Gulch Mine; 1980-06-01 to 1983-05-17; source msha-controller-operator-history
- **controller_controls_operator:** Brazill George & Duane → Brazill Mining; 1980-06-01 to 1983-05-17; source msha-controller-operator-history
- **operator_operates_mine:** Giguere Industries Inc → Washington Gulch Mine; 1983-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Giguere Charles → Washington Gulch Mine; 1983-05-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Giguere Charles → Giguere Industries Inc; 1983-05-18 to current/open; source msha-controller-operator-history