# Relationship history for MSHA mine 2000371

Current hierarchy: **Inmet Mining Corp → Copper Range Company → WHITE PINE 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:** White Pine Copper Division-Copper Range Company → WHITE PINE MINE; 1950-01-01 to 1985-11-06; source msha-controller-operator-history
- **controller_controls_mine:** Echo Bay Mines Ltd → WHITE PINE MINE; 1950-01-01 to 1985-11-06; source msha-controller-operator-history
- **controller_controls_operator:** Echo Bay Mines Ltd → White Pine Copper Division-Copper Range Company; 1950-01-01 to 1985-11-06; source msha-controller-operator-history
- **operator_operates_mine:** Copper Range Company → WHITE PINE MINE; 1989-12-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Inmet Mining Corp → WHITE PINE MINE; 1989-12-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Inmet Mining Corp → Copper Range Company; 1989-12-27 to current/open; source msha-controller-operator-history