# Relationship history for MSHA mine 0404304

Current hierarchy: **Lawrence M  Beigh → Valley Rock Products Inc → Mills 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

- **controller_controls_mine:** Lawrence M  Beigh → Mills Pit; 1978-03-09 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Valley Rock Products Inc → Mills Pit; 1979-04-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lawrence M  Beigh → Valley Rock Products Inc; 1979-04-01 to current/open; source msha-controller-operator-history