# Relationship history for MSHA mine 2901791

Current hierarchy: **Van Zyl Bernard → Resources America Inc → Mount Baldy**

- 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

- **controller_controls_mine:** Perkins Tim & Kelly Shumway → Mount Baldy; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ingraham Floyd Et Al → Mount Baldy; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Capitan Resources Inc → Mount Baldy; 1979-12-01 to 1980-11-30; source msha-controller-operator-history
- **controller_controls_operator:** Ingraham Floyd Et Al → Capitan Resources Inc; 1979-12-01 to 1980-11-30; source msha-controller-operator-history
- **controller_controls_mine:** Van Zyl Bernard → Mount Baldy; 1980-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Look Mining Company → Mount Baldy; 1980-12-01 to 1981-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Perkins Tim & Kelly Shumway → Look Mining Company; 1980-12-01 to 1981-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Resources America Inc → Mount Baldy; 1981-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Van Zyl Bernard → Resources America Inc; 1981-07-01 to current/open; source msha-controller-operator-history