# Relationship history for MSHA mine 0405329

Current hierarchy: **Dave  Beck → C D G Materials Inc → S-5 PLANT**

- 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:** C D G Materials Inc → S-5 PLANT; 1997-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Dave  Beck → S-5 PLANT; 1997-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Dave  Beck → C D G Materials Inc; 1997-11-01 to current/open; source msha-controller-operator-history