# Relationship history for MSHA mine 0201982

Current hierarchy: **Madol Jozsef → Arizona Tufa Mining Corp → Arizona Tufa Mining Corporation**

- 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:** Magic Mountain Mining Company → Arizona Tufa Mining Corporation; 1980-04-01 to 1986-08-07; source msha-controller-operator-history
- **controller_controls_mine:** Israel Bernard → Arizona Tufa Mining Corporation; 1980-04-01 to 1986-08-07; source msha-controller-operator-history
- **controller_controls_operator:** Israel Bernard → Magic Mountain Mining Company; 1980-04-01 to 1986-08-07; source msha-controller-operator-history
- **operator_operates_mine:** Arizona Tufa Mining Corp → Arizona Tufa Mining Corporation; 1986-08-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Madol Jozsef → Arizona Tufa Mining Corporation; 1986-08-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Madol Jozsef → Arizona Tufa Mining Corp; 1986-08-08 to current/open; source msha-controller-operator-history