# Relationship history for MSHA mine 0600848

Current hierarchy: **Christopher  Defeo → Defeo Materials LLC → DEFEO PORTABLE PLANT**

- 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:** Defeo Materials LLC → DEFEO PORTABLE PLANT; 2025-01-27 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Christopher  Defeo → DEFEO PORTABLE PLANT; 2025-01-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Christopher  Defeo → Defeo Materials LLC; 2025-01-27 to current/open; source msha-controller-operator-history