# Relationship history for MSHA mine 5001484

Current hierarchy: **Mc Donald B W → Windfall Gold Mining Corp → Cooper Gulch No 2**

- 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:** Mc Donald B W → Cooper Gulch No 2; 1984-06-17 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Windfall Gold Mining Corp → Cooper Gulch No 2; 1985-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mc Donald B W → Windfall Gold Mining Corp; 1985-05-01 to current/open; source msha-controller-operator-history