# Relationship history for MSHA mine 5400140

Current hierarchy: **Gilberto  Benitez → Northwest Enterprise Inc → Cantera Benitez**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Cantera Ruiz Crespo → Cantera Benitez; 1950-01-01 to 1980-03-19; source msha-controller-operator-history
- **controller_controls_mine:** Crespo Hermino Ruiz → Cantera Benitez; 1950-01-01 to 1980-03-19; source msha-controller-operator-history
- **controller_controls_operator:** Crespo Hermino Ruiz → Cantera Ruiz Crespo; 1950-01-01 to 1980-03-19; source msha-controller-operator-history
- **operator_operates_mine:** Northwest Enterprise Inc → Cantera Benitez; 1980-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Gilberto  Benitez → Cantera Benitez; 1980-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gilberto  Benitez → Northwest Enterprise Inc; 1980-03-20 to current/open; source msha-controller-operator-history