# Relationship history for MSHA mine 0201881

Current hierarchy: **Magma Copper Company → Magma Copper Company → Tiger Open Pit 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:** Newmont Corporation → Tiger Open Pit Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Sidney  Hullinger et al → Tiger Open Pit Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Andrew J  Gilbert III → Tiger Open Pit Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wainwright Gordon → Tiger Open Pit Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Wilcock J W → Tiger Open Pit Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gordon Wainwright-Contractor → Tiger Open Pit Mine; 1978-03-09 to 1979-05-14; source msha-controller-operator-history
- **controller_controls_operator:** Wainwright Gordon → Gordon Wainwright-Contractor; 1978-03-09 to 1979-05-14; source msha-controller-operator-history
- **operator_operates_mine:** Joy Manufacturing Company → Tiger Open Pit Mine; 1979-05-15 to 1980-08-27; source msha-controller-operator-history
- **controller_controls_operator:** Wilcock J W → Joy Manufacturing Company; 1979-05-15 to 1980-08-27; source msha-controller-operator-history
- **operator_operates_mine:** Magma Copper Company → Tiger Open Pit Mine; 1980-08-28 to 1985-03-10; source msha-controller-operator-history
- **controller_controls_operator:** Newmont Corporation → Magma Copper Company; 1980-08-28 to 1985-03-10; source msha-controller-operator-history
- **operator_operates_mine:** A J Gilbert Construction Company → Tiger Open Pit Mine; 1985-03-11 to 1987-05-04; source msha-controller-operator-history
- **controller_controls_operator:** Andrew J  Gilbert III → A J Gilbert Construction Company; 1985-03-11 to 1987-05-04; source msha-controller-operator-history
- **controller_controls_mine:** Magma Copper Company → Tiger Open Pit Mine; 1987-03-10 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Mc Farland & Hullinger → Tiger Open Pit Mine; 1987-05-05 to 1989-08-03; source msha-controller-operator-history
- **controller_controls_operator:** Sidney  Hullinger et al → Mc Farland & Hullinger; 1987-05-05 to 1989-08-03; source msha-controller-operator-history
- **controller_controls_operator:** Fayette  McFarland et al → Mc Farland & Hullinger; 1987-05-05 to 1989-08-03; source msha-controller-operator-history
- **operator_operates_mine:** Magma Copper Company → Tiger Open Pit Mine; 1989-08-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Magma Copper Company → Magma Copper Company; 1989-08-04 to current/open; source msha-controller-operator-history