# Relationship history for MSHA mine 4103935

Current hierarchy: **Ildefonso  Curiel → Curiels Aggregates & Materials → PLANT-17 EARTH & PAVING CONST**

- 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:** Curiels Aggregates & Materials → PLANT-17 EARTH & PAVING CONST; 1997-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Ildefonso  Curiel → PLANT-17 EARTH & PAVING CONST; 1997-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ildefonso  Curiel → Curiels Aggregates & Materials; 1997-03-01 to current/open; source msha-controller-operator-history