# Relationship history for MSHA mine 5001492

Current hierarchy: **Kinross Gold Corporation → Fairbanks Gold Mining Inc → Ryan Lode 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

- **controller_controls_mine:** Kinross Gold Corporation → Ryan Lode Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Citigold American Inc → Ryan Lode Mine; 1985-08-01 to 1987-06-16; source msha-controller-operator-history
- **controller_controls_mine:** Robert J  Toporowski → Ryan Lode Mine; 1985-08-01 to 1987-06-16; source msha-controller-operator-history
- **controller_controls_operator:** Robert J  Toporowski → Citigold American Inc; 1985-08-01 to 1987-06-16; source msha-controller-operator-history
- **operator_operates_mine:** Ryan Lode Mines Inc → Ryan Lode Mine; 1987-06-17 to 1999-03-02; source msha-controller-operator-history
- **controller_controls_mine:** La Teko Resources Ltd → Ryan Lode Mine; 1987-06-17 to 1999-03-02; source msha-controller-operator-history
- **controller_controls_operator:** La Teko Resources Ltd → Ryan Lode Mines Inc; 1987-06-17 to 1999-03-02; source msha-controller-operator-history
- **operator_operates_mine:** Fairbanks Gold Mining Inc → Ryan Lode Mine; 1999-03-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kinross Gold Corporation → Fairbanks Gold Mining Inc; 1999-03-03 to current/open; source msha-controller-operator-history