# Relationship history for MSHA mine 2401798

Current hierarchy: **Jack  Morgenstern → Century Paving → Century Paving Portable Crusher**

- 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:** Century Paving → Century Paving Portable Crusher; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jack  Morgenstern et al → Century Paving Portable Crusher; 1985-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jack  Morgenstern et al → Century Paving; 1985-07-01 to current/open; source msha-controller-operator-history