# Relationship history for MSHA mine 5400019

Current hierarchy: **Alfonso M  Diaz Jr → Cantera Carraizo Inc → CANTERA CARRAIZO**

- 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 Carraizo Inc → CANTERA CARRAIZO; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Alfonso M  Diaz → CANTERA CARRAIZO; 1950-01-01 to 2012-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Alfonso M  Diaz → Cantera Carraizo Inc; 1950-01-01 to 2012-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Milagros D  Merheb → CANTERA CARRAIZO; 2012-05-01 to 2019-02-19; source msha-controller-operator-history
- **controller_controls_operator:** Milagros D  Merheb → Cantera Carraizo Inc; 2012-05-01 to 2019-02-19; source msha-controller-operator-history
- **controller_controls_mine:** Alfonso M  Diaz Jr → CANTERA CARRAIZO; 2019-02-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alfonso M  Diaz Jr → Cantera Carraizo Inc; 2019-02-20 to current/open; source msha-controller-operator-history