# Relationship history for MSHA mine 0502730

Current hierarchy: **Calais Resources Inc → Grand Island Resources, LLC → Consolidated Caribou District**

- 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:** Hendricks Mining Company → Consolidated Caribou District; 1950-01-01 to 1998-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Hendricks Minerals → Consolidated Caribou District; 1950-01-01 to 1998-08-31; source msha-controller-operator-history
- **controller_controls_operator:** Hendricks Minerals → Hendricks Mining Company; 1950-01-01 to 1998-08-31; source msha-controller-operator-history
- **operator_operates_mine:** Calais Resources Company → Consolidated Caribou District; 1998-09-01 to 2020-01-07; source msha-controller-operator-history
- **controller_controls_mine:** Calais Resources Inc → Consolidated Caribou District; 1998-09-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Calais Resources Inc → Calais Resources Company; 1998-09-01 to 2020-01-07; source msha-controller-operator-history
- **operator_operates_mine:** Grand Island Resources, LLC → Consolidated Caribou District; 2020-01-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Calais Resources Inc → Consolidated Caribou District; 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