# Relationship history for MSHA mine 2602743

Current hierarchy: **Patrick J  Hughes; Wayne  Weber → Columbia Gold Mines Ltd → Columbia Gold Mines Ltd**

- 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:** Columbia Gold Mines Ltd → Columbia Gold Mines Ltd; 2013-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wayne  Weber et al → Columbia Gold Mines Ltd; 2013-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Wayne  Weber et al → Columbia Gold Mines Ltd; 2013-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Patrick J  Hughes et al → Columbia Gold Mines Ltd; 2013-06-01 to current/open; source msha-controller-operator-history