# Relationship history for MSHA mine 1302351

Current hierarchy: **Pat L  Swan → Twin States Limestone, 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Twin States Limestone, LLC → Plant #2; 2007-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pat L  Swan et al → Plant #2; 2007-07-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pat L  Swan et al → Twin States Limestone, LLC; 2007-07-17 to current/open; source msha-controller-operator-history