# Relationship history for MSHA mine 4202116

Current hierarchy: **Neary Resources & Amelia Investments Inc → Gemstone Mining Inc → RED EMERALD**

- 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:** Kennecott Minerals Company → RED EMERALD; 1995-09-01 to 1997-03-23; source msha-controller-operator-history
- **controller_controls_mine:** Rio Tinto Group → RED EMERALD; 1995-09-01 to 1997-03-23; source msha-controller-operator-history
- **controller_controls_operator:** Rio Tinto Group → Kennecott Minerals Company; 1995-09-01 to 1997-03-23; source msha-controller-operator-history
- **operator_operates_mine:** Gemstone Mining Inc → RED EMERALD; 1997-03-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Neary Resources & Amelia Investments Inc → RED EMERALD; 1997-03-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Neary Resources & Amelia Investments Inc → Gemstone Mining Inc; 1997-03-24 to current/open; source msha-controller-operator-history