# Relationship history for MSHA mine 2600340

Current hierarchy: **Guardian Metal Resources Plc. → Tempiute Inc. → TEMPIUTE**

- 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:** Umetco Minerals Corp → TEMPIUTE; 1950-01-01 to 2026-07-16; source msha-controller-operator-history
- **controller_controls_mine:** Union Carbide Corp → TEMPIUTE; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Union Carbide Corp → Umetco Minerals Corp; 1950-01-01 to 2026-07-16; source msha-controller-operator-history
- **operator_operates_mine:** Tempiute Inc. → TEMPIUTE; 2026-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Guardian Metal Resources Plc. → TEMPIUTE; 2026-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Guardian Metal Resources Plc. → Tempiute Inc.; 2026-07-17 to current/open; source msha-controller-operator-history