# Relationship history for MSHA mine 5400102

Current hierarchy: ** → Western Rental Equipment Corp → Cantera Las Lomas**

- 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:** Conrado Forestier Inc → Cantera Las Lomas; 1950-01-01 to 1978-09-15; source msha-controller-operator-history
- **controller_controls_mine:** Forestier Conrado Sr → Cantera Las Lomas; 1950-01-01 to 1978-09-15; source msha-controller-operator-history
- **controller_controls_operator:** Forestier Conrado Sr → Conrado Forestier Inc; 1950-01-01 to 1978-09-15; source msha-controller-operator-history
- **operator_operates_mine:** El Rosario Sand Corp → Cantera Las Lomas; 1978-09-16 to 1980-01-16; source msha-controller-operator-history
- **controller_controls_mine:** Conrado  Forestier Jr → Cantera Las Lomas; 1978-09-16 to 1980-01-16; source msha-controller-operator-history
- **controller_controls_operator:** Conrado  Forestier Jr → El Rosario Sand Corp; 1978-09-16 to 1980-01-16; source msha-controller-operator-history
- **operator_operates_mine:** Western Rental Equipment Corp → Cantera Las Lomas; 1980-01-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** San Miguel Jose Juan → Cantera Las Lomas; 1980-01-17 to 1985-12-31; source msha-controller-operator-history
- **controller_controls_operator:** San Miguel Jose Juan → Western Rental Equipment Corp; 1980-01-17 to 1985-12-31; source msha-controller-operator-history