# Relationship history for MSHA mine 3503282

Current hierarchy: **Sam  Humbert → Humbert Enterprises Inc → Humbert Enterprises Portable Crusher No**

- 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:** Sam  Humbert → Humbert Enterprises Portable Crusher No; 1986-11-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Humbert Enterprises Inc → Humbert Enterprises Portable Crusher No; 1987-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Sam  Humbert → Humbert Enterprises Inc; 1987-05-01 to current/open; source msha-controller-operator-history