# Relationship history for MSHA mine 5400472

Current hierarchy: **Randy  Barbosa → Carraizo Aggregates, Inc → Carraizo Aggregates, Inc**

- 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:** Cantera Betancourt → Carraizo Aggregates, Inc; 2008-08-11 to 2010-04-01; source msha-controller-operator-history
- **controller_controls_mine:** Enrique  Betancourt → Carraizo Aggregates, Inc; 2008-08-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Enrique  Betancourt → Cantera Betancourt; 2008-08-11 to 2010-04-01; source msha-controller-operator-history
- **operator_operates_mine:** Dredging and Dewatering Solutions Inc → Carraizo Aggregates, Inc; 2010-04-02 to 2011-02-06; source msha-controller-operator-history
- **controller_controls_mine:** Waldemar  Quiles → Carraizo Aggregates, Inc; 2010-04-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Waldemar  Quiles → Dredging and Dewatering Solutions Inc; 2010-04-02 to 2011-02-06; source msha-controller-operator-history
- **operator_operates_mine:** Carraizo Aggregates, Inc → Carraizo Aggregates, Inc; 2011-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Randy  Barbosa → Carraizo Aggregates, Inc; 2011-02-07 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Randy  Barbosa → Carraizo Aggregates, Inc; 2011-02-07 to current/open; source msha-controller-operator-history