# Relationship history for MSHA mine 2602307

Current hierarchy: **i-80 Gold Corp → Ruby Hill Mining Company, LLC → Ruby 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Homestake Mining Company → Ruby Hill Mine; 1950-01-01 to 2001-12-13; source msha-controller-operator-history
- **operator_operates_mine:** Homestake Mining Company Of California → Ruby Hill Mine; 1997-01-01 to 2016-01-03; source msha-controller-operator-history
- **controller_controls_operator:** Homestake Mining Company → Homestake Mining Company Of California; 1997-01-01 to 2001-12-13; source msha-controller-operator-history
- **controller_controls_mine:** Barrick Gold Corp → Ruby Hill Mine; 2001-12-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barrick Gold Corp → Homestake Mining Company Of California; 2001-12-14 to 2016-01-03; source msha-controller-operator-history
- **operator_operates_mine:** Ruby Hill Mining Company, LLC → Ruby Hill Mine; 2016-01-04 to 2021-11-07; source msha-controller-operator-history
- **controller_controls_mine:** Waterton Global Resource Management Cayman Corp → Ruby Hill Mine; 2016-01-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Waterton Global Resource Management Cayman Corp → Ruby Hill Mining Company, LLC; 2016-01-04 to 2021-11-07; source msha-controller-operator-history
- **operator_operates_mine:** Ruby Hill Mining Company, LLC → Ruby Hill Mine; 2021-11-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** i-80 Gold Corp → Ruby Hill Mine; 2021-11-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** i-80 Gold Corp → Ruby Hill Mining Company, LLC; 2021-11-08 to current/open; source msha-controller-operator-history