# Relationship history for MSHA mine 1401706

Current hierarchy: **William M  Jahnke → Prairie Stone, LLC → Mobile plant**

- 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:** Prairie Stone, LLC → Mobile plant; 2009-07-30 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** William M  Jahnke → Mobile plant; 2009-07-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William M  Jahnke → Prairie Stone, LLC; 2009-07-30 to current/open; source msha-controller-operator-history