# Relationship history for MSHA mine 5400037

Current hierarchy: **Paride  Mazza; Alfonso M Diaz → AGREGADOS HUMACAO LLC → Cantera Perez**

- 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 Perez Inc → Cantera Perez; 1950-01-01 to 2022-01-27; source msha-controller-operator-history
- **controller_controls_mine:** Jose R  Cordero → Cantera Perez; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jose R  Cordero → Cantera Perez Inc; 1950-01-01 to 2022-01-27; source msha-controller-operator-history
- **operator_operates_mine:** AGREGADOS HUMACAO LLC → Cantera Perez; 2022-01-28 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Paride  Mazza et al → Cantera Perez; 2022-01-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paride  Mazza et al → AGREGADOS HUMACAO LLC; 2022-01-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Alfonso M Diaz et al → AGREGADOS HUMACAO LLC; 2022-01-28 to current/open; source msha-controller-operator-history