# Relationship history for MSHA mine 4703171

Current hierarchy: **Jack J Peters → Peters Concrete Company → Superior Wash Plant #1**

- 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:** Jack J Peters → Superior Wash Plant #1; 1985-09-24 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Peters Concrete Company → Superior Wash Plant #1; 1999-02-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jack J Peters → Peters Concrete Company; 1999-02-01 to current/open; source msha-controller-operator-history