# Relationship history for MSHA mine 5400097

Current hierarchy: **Edwin (Torres)  Del Valle → Edwin Del Valle (Torres) → Cantera Del Valle**

- 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 La Monserrate Inc → Cantera Del Valle; 1950-01-01 to 1983-07-21; source msha-controller-operator-history
- **controller_controls_mine:** Pirallo Ginette → Cantera Del Valle; 1950-01-01 to 1983-07-21; source msha-controller-operator-history
- **controller_controls_operator:** Pirallo Ginette → Cantera La Monserrate Inc; 1950-01-01 to 1983-07-21; source msha-controller-operator-history
- **operator_operates_mine:** Edwin Del Valle (Torres) → Cantera Del Valle; 1983-07-22 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Edwin (Torres)  Del Valle → Cantera Del Valle; 1983-07-22 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Edwin (Torres)  Del Valle → Edwin Del Valle (Torres); 1983-07-22 to current/open; source msha-controller-operator-history