# Relationship history for MSHA mine 2601801

Current hierarchy: **Barrick Gold Corp → Barrick Turquoise Ridge Inc → Getchell Mine & Mill**

- 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:** EI DuPont De Nemours & Co Inc → Getchell Mine & Mill; 1981-08-06 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Conoco Inc → Getchell Mine & Mill; 1982-06-01 to 1983-07-06; source msha-controller-operator-history
- **controller_controls_operator:** EI DuPont De Nemours & Co Inc → Conoco Inc; 1982-06-01 to 1983-07-06; source msha-controller-operator-history
- **operator_operates_mine:** Firstmiss Gold Inc → Getchell Mine & Mill; 1983-07-07 to 1996-06-30; source msha-controller-operator-history
- **controller_controls_mine:** First Mississippi Corp → Getchell Mine & Mill; 1983-07-07 to 1996-06-30; source msha-controller-operator-history
- **controller_controls_operator:** First Mississippi Corp → Firstmiss Gold Inc; 1983-07-07 to 1996-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Getchell Gold Corp → Getchell Mine & Mill; 1996-07-01 to 1999-05-27; source msha-controller-operator-history
- **controller_controls_mine:** Getchell Gold Corp → Getchell Mine & Mill; 1996-07-01 to 1999-05-27; source msha-controller-operator-history
- **controller_controls_operator:** Getchell Gold Corp → Getchell Gold Corp; 1996-07-01 to 1999-05-27; source msha-controller-operator-history
- **operator_operates_mine:** Barrick Turquoise Ridge Inc → Getchell Mine & Mill; 1999-05-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Placer Dome Ltd → Getchell Mine & Mill; 1999-05-28 to 2006-06-08; source msha-controller-operator-history
- **controller_controls_operator:** Placer Dome Ltd → Barrick Turquoise Ridge Inc; 1999-05-28 to 2006-06-08; source msha-controller-operator-history
- **controller_controls_mine:** Barrick Gold Corp → Getchell Mine & Mill; 2006-06-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Barrick Gold Corp → Barrick Turquoise Ridge Inc; 2006-06-09 to current/open; source msha-controller-operator-history