# Relationship history for MSHA mine 2601577

Current hierarchy: **Coffin Bill → North Star Minerals Inc → North Star**

- 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:** Commodore Resources Corp → North Star; 1979-11-01 to 1980-10-27; source msha-controller-operator-history
- **controller_controls_mine:** Robertson James → North Star; 1979-11-01 to 1980-10-27; source msha-controller-operator-history
- **controller_controls_operator:** Robertson James → Commodore Resources Corp; 1979-11-01 to 1980-10-27; source msha-controller-operator-history
- **operator_operates_mine:** North Star Minerals Inc → North Star; 1980-10-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Coffin Bill → North Star; 1980-10-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Coffin Bill → North Star Minerals Inc; 1980-10-28 to current/open; source msha-controller-operator-history