# Relationship history for MSHA mine 2103317

Current hierarchy: **Michael J Skubic → Premier Aggregates LLC → Plant #7 - Kodiak 400**

- 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:** Michael J Skubic → Plant #7 - Kodiak 400; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Premier Aggregates LLC → Plant #7 - Kodiak 400; 2002-05-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael J Skubic → Premier Aggregates LLC; 2002-05-08 to current/open; source msha-controller-operator-history