# Relationship history for MSHA mine 0203273

Current hierarchy: **Matt  Klump → Klump Materials → Klump Pit**

- 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

- **operator_operates_mine:** Klump Materials → Klump Pit; 2011-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Matt  Klump → Klump Pit; 2011-03-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Matt  Klump → Klump Materials; 2011-03-08 to current/open; source msha-controller-operator-history