# Relationship history for MSHA mine 2003648

Current hierarchy: **Joe  Hilborn → Hilborns Custom Timber Management → Terex 400 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:** Hilborns Custom Timber Management → Terex 400 Crusher; 2023-05-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Joe  Hilborn → Terex 400 Crusher; 2023-05-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joe  Hilborn → Hilborns Custom Timber Management; 2023-05-17 to current/open; source msha-controller-operator-history