# Relationship history for MSHA mine 4105551

Current hierarchy: **Jeff  Wanic → Sustainable Pavement Technologies → SPT - Eastland**

- 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:** Sustainable Pavement Technologies → SPT - Eastland; 2021-02-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jeff  Wanic → SPT - Eastland; 2021-02-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeff  Wanic → Sustainable Pavement Technologies; 2021-02-16 to current/open; source msha-controller-operator-history