# Relationship history for MSHA mine 1001632

Current hierarchy: **Jones Tyler → Pro Agg Inc → Pro Agg Mill**

- 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:** Pro Agg Inc → Pro Agg Mill; 1984-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jones Tyler → Pro Agg Mill; 1984-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jones Tyler → Pro Agg Inc; 1984-03-01 to current/open; source msha-controller-operator-history