# Relationship history for MSHA mine 3003467

Current hierarchy: **Harry  Blustein → Custom Crushing & Materials Inc. → Portable Pegson 1300**

- 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:** Custom Crushing & Materials Inc. → Portable Pegson 1300; 2004-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Harry  Blustein → Portable Pegson 1300; 2004-07-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Harry  Blustein → Custom Crushing & Materials Inc.; 2004-07-28 to current/open; source msha-controller-operator-history