# Relationship history for MSHA mine 0502430

Current hierarchy: **Calais Resources Inc → Grand Island Resources, LLC → Cross 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Cross Mining Company Ltd → Cross Mine; 1950-01-01 to 2013-03-20; source msha-controller-operator-history
- **controller_controls_mine:** Cross Mining Company Ltd → Cross Mine; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cross Mining Company Ltd → Cross Mining Company Ltd; 1950-01-01 to 2013-03-20; source msha-controller-operator-history
- **operator_operates_mine:** Calais Resources Colorado Inc → Cross Mine; 2013-03-21 to 2020-01-07; source msha-controller-operator-history
- **controller_controls_mine:** Calais Resources Inc → Cross Mine; 2013-03-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Calais Resources Inc → Calais Resources Colorado Inc; 2013-03-21 to 2020-01-07; source msha-controller-operator-history
- **operator_operates_mine:** Grand Island Resources, LLC → Cross Mine; 2020-01-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Calais Resources Inc → Cross Mine; 2020-01-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Calais Resources Inc → Grand Island Resources, LLC; 2020-01-08 to current/open; source msha-controller-operator-history