# Relationship history for MSHA mine 5400421

Current hierarchy: **Edgardo  Crespo → EDGARDO CRESPO → CANTERA EL YUNQUE**

- 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:** Cardumar Inc → CANTERA EL YUNQUE; 1999-07-01 to 2002-02-27; source msha-controller-operator-history
- **controller_controls_mine:** Manuel  Duran → CANTERA EL YUNQUE; 1999-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Manuel  Duran → Cardumar Inc; 1999-07-01 to 2002-02-27; source msha-controller-operator-history
- **operator_operates_mine:** EDGARDO CRESPO → CANTERA EL YUNQUE; 2002-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Edgardo  Crespo → CANTERA EL YUNQUE; 2002-02-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edgardo  Crespo → EDGARDO CRESPO; 2002-02-28 to current/open; source msha-controller-operator-history