# Relationship history for MSHA mine 2402768

Current hierarchy: **Bridget A Korpi; Adam R Korpi → Ironside Stone Works → Judith River Quarry**

- 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

- **controller_controls_mine:** Adam R Korpi et al → Judith River Quarry; 2018-03-23 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Ironside Stone Works → Judith River Quarry; 2021-09-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Adam R Korpi et al → Ironside Stone Works; 2021-09-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Bridget A Korpi et al → Ironside Stone Works; 2021-09-22 to current/open; source msha-controller-operator-history