# Relationship history for MSHA mine 1001475

Current hierarchy: **Coeur Mining, Inc. → Coeur-Thunder Mountain Inc → Sunnyside**

- 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:** Canadian Superior Mining (Us) Ltd → Sunnyside; 1980-07-01 to 1983-08-29; source msha-controller-operator-history
- **controller_controls_mine:** Canadian Superior Mining (Us) Ltd → Sunnyside; 1980-07-01 to 1983-08-29; source msha-controller-operator-history
- **controller_controls_operator:** Canadian Superior Mining (Us) Ltd → Canadian Superior Mining (Us) Ltd; 1980-07-01 to 1983-08-29; source msha-controller-operator-history
- **operator_operates_mine:** Coeur-Thunder Mountain Inc → Sunnyside; 1983-08-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Coeur Mining, Inc. → Sunnyside; 1983-08-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Coeur Mining, Inc. → Coeur-Thunder Mountain Inc; 1983-08-30 to current/open; source msha-controller-operator-history