# Relationship history for MSHA mine 5001642

Current hierarchy: **Northern Star Resources Ltd → Northern Star (Pogo) LLC → Pogo 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:** Northern Star (Pogo) LLC → Pogo Mine; 1998-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Teck Corp → Pogo Mine; 1998-06-01 to 2009-07-06; source msha-controller-operator-history
- **controller_controls_operator:** Teck Corp → Northern Star (Pogo) LLC; 1998-06-01 to 2009-07-06; source msha-controller-operator-history
- **controller_controls_mine:** Sumitomo Metal Mining Co Ltd et al → Pogo Mine; 2009-07-07 to 2018-09-27; source msha-controller-operator-history
- **controller_controls_operator:** Sumitomo Metal Mining Co Ltd et al → Northern Star (Pogo) LLC; 2009-07-07 to 2018-09-27; source msha-controller-operator-history
- **controller_controls_mine:** Northern Star Resources Ltd → Pogo Mine; 2018-09-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Northern Star Resources Ltd → Northern Star (Pogo) LLC; 2018-09-28 to current/open; source msha-controller-operator-history