# Relationship history for MSHA mine 2602673

Current hierarchy: **Barrick Nevada Holding LLC; Newmont USA Limited → Nevada Gold Mines LLC → Roaster Operations**

- 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:** Barrick Gold Corp → Roaster Operations; 1986-12-31 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Barrick Goldstrike Mines Inc → Roaster Operations; 2009-04-30 to 2019-07-22; source msha-controller-operator-history
- **controller_controls_operator:** Barrick Gold Corp → Barrick Goldstrike Mines Inc; 2009-04-30 to 2019-07-22; source msha-controller-operator-history
- **controller_controls_mine:** Newmont USA Limited et al → Roaster Operations; 2019-07-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Nevada Gold Mines LLC → Roaster Operations; 2019-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Newmont USA Limited et al → Nevada Gold Mines LLC; 2019-07-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barrick Nevada Holding LLC et al → Nevada Gold Mines LLC; 2019-07-23 to current/open; source msha-controller-operator-history