# Relationship history for MSHA mine 1519978

Current hierarchy: **Vic  DiGeronimo Jr → Independence Excavating → Fabtech3455**

- 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

- **controller_controls_mine:** Vic  DiGeronimo Jr et al → Fabtech3455; 2002-07-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Independence Excavating → Fabtech3455; 2025-05-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Vic  DiGeronimo Jr et al → Independence Excavating; 2025-05-29 to current/open; source msha-controller-operator-history