# Relationship history for MSHA mine 2402395

Current hierarchy: **Ralph E  Jackson → Nusite Stone/Clearwater Stone → Soap Gulch Quarry- Nusite Stone**

- 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:** Nusite Stone/Clearwater Stone → Soap Gulch Quarry- Nusite Stone; 2005-02-23 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ralph E  Jackson → Soap Gulch Quarry- Nusite Stone; 2005-02-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ralph E  Jackson → Nusite Stone/Clearwater Stone; 2005-02-23 to current/open; source msha-controller-operator-history