# Relationship history for MSHA mine 1002019

Current hierarchy: **Geraldine R  Hansen → Rock Works Mining Inc → Salmon River Red**

- 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:** Rock Works Mining Inc → Salmon River Red; 2001-11-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** R Kirk  Hansen → Salmon River Red; 2001-11-28 to 2016-02-25; source msha-controller-operator-history
- **controller_controls_operator:** R Kirk  Hansen → Rock Works Mining Inc; 2001-11-28 to 2016-02-25; source msha-controller-operator-history
- **controller_controls_mine:** Geraldine R  Hansen → Salmon River Red; 2016-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Geraldine R  Hansen → Rock Works Mining Inc; 2016-02-26 to current/open; source msha-controller-operator-history