# Relationship history for MSHA mine 5001232

Current hierarchy: **Doring Dick & Bill Townsend → Two Wolves Mining & Milling Company → Willow Creek 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Two Wolves Mining & Milling Company → Willow Creek Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Doring Dick & Bill Townsend → Willow Creek Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Doring Dick & Bill Townsend → Two Wolves Mining & Milling Company; 1950-01-01 to current/open; source msha-controller-operator-history