# Relationship history for MSHA mine 3500670

Current hierarchy: **Baker Gold Ltd → Baker Resources (Usa) Inc → Argonaut 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:** Baker Resources (Usa) Inc → Argonaut Mine; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Baker Gold Ltd → Argonaut Mine; 1978-03-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Baker Gold Ltd → Baker Resources (Usa) Inc; 1978-03-09 to current/open; source msha-controller-operator-history