# Relationship history for MSHA mine 4703878

Current hierarchy: **Jeff  Antczak → Antczak Aggregate Producers LLC → McCloskey Mobile Screener #1602-306**

- 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:** Jeff  Antczak → McCloskey Mobile Screener #1602-306; 2018-03-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Antczak Aggregate Producers LLC → McCloskey Mobile Screener #1602-306; 2020-06-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jeff  Antczak → Antczak Aggregate Producers LLC; 2020-06-23 to current/open; source msha-controller-operator-history