# Relationship history for MSHA mine 0200411

Current hierarchy: **Arimetco International Inc → Arimetco Inc → JOHNSON CAMP 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

- **operator_operates_mine:** Cyprus-Johnson Copper Company → JOHNSON CAMP MINE; 1950-01-01 to 1980-09-21; source msha-controller-operator-history
- **controller_controls_mine:** Cyprus Mines Corp → JOHNSON CAMP MINE; 1950-01-01 to 1980-09-21; source msha-controller-operator-history
- **controller_controls_operator:** Cyprus Mines Corp → Cyprus-Johnson Copper Company; 1950-01-01 to 1980-09-21; source msha-controller-operator-history
- **operator_operates_mine:** Cyprus-Johnson Copper Company → JOHNSON CAMP MINE; 1980-09-22 to 1990-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Cyprus Amax Minerals Company → JOHNSON CAMP MINE; 1980-09-22 to 1990-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Cyprus Amax Minerals Company → Cyprus-Johnson Copper Company; 1980-09-22 to 1990-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Arimetco International Inc → JOHNSON CAMP MINE; 1989-07-26 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Arimetco Inc → JOHNSON CAMP MINE; 1990-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Arimetco International Inc → Arimetco Inc; 1990-08-01 to current/open; source msha-controller-operator-history