# Relationship history for MSHA mine 2801044

Current hierarchy: **Mario C  Diliberto → Aztec Materials, LLC → Aztec**

- 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:** Aztec Materials, LLC → Aztec; 2014-12-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Mario C  Diliberto → Aztec; 2014-12-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Mario C  Diliberto → Aztec Materials, LLC; 2014-12-03 to current/open; source msha-controller-operator-history