# Relationship history for MSHA mine 4300774

Current hierarchy: **Philip E Mazzucco; Veronica E Mazzucco → V & M Excavating LLC → 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** V & M Excavating LLC → Portable Crusher; 2015-12-16 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Veronica E Mazzucco et al → Portable Crusher; 2015-12-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Veronica E Mazzucco et al → V & M Excavating LLC; 2015-12-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Philip E Mazzucco et al → V & M Excavating LLC; 2015-12-16 to current/open; source msha-controller-operator-history