# Relationship history for MSHA mine 4703895

Current hierarchy: **Cole W  Szpara → Slobodnik Gravel and Excavating, LLC → Plant 2**

- 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:** Cole W  Szpara → Plant 2; 2014-06-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Slobodnik Gravel and Excavating, LLC → Plant 2; 2021-04-30 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cole W  Szpara → Slobodnik Gravel and Excavating, LLC; 2021-04-30 to current/open; source msha-controller-operator-history