# Relationship history for MSHA mine 5001329

Current hierarchy: **Silverado Gold Mines Ltd → Tri-Con Mining Inc → Tri-Con Mill Or New Tri-Con Mill**

- 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:** Silverado Gold Mines Ltd → Tri-Con Mill Or New Tri-Con Mill; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Tri-Con Mining Inc → Tri-Con Mill Or New Tri-Con Mill; 1980-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Silverado Gold Mines Ltd → Tri-Con Mining Inc; 1980-05-01 to current/open; source msha-controller-operator-history