# Relationship history for MSHA mine 0405159

Current hierarchy: **Kinross Gold Corporation → Lassen Gold Mining Inc → Hayden Hill 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Lassen Gold Mining Inc → Hayden Hill Mine; 1991-09-01 to 1998-02-08; source msha-controller-operator-history
- **controller_controls_mine:** Amax Gold Inc Et Al → Hayden Hill Mine; 1991-09-01 to 1998-02-08; source msha-controller-operator-history
- **controller_controls_operator:** Amax Gold Inc Et Al → Lassen Gold Mining Inc; 1991-09-01 to 1998-02-08; source msha-controller-operator-history
- **operator_operates_mine:** Lassen Gold Mining Inc → Hayden Hill Mine; 1998-02-09 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Kinross Gold Corporation → Hayden Hill Mine; 1998-02-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kinross Gold Corporation → Lassen Gold Mining Inc; 1998-02-09 to current/open; source msha-controller-operator-history