# Relationship history for MSHA mine 5400053

Current hierarchy: **Cemex S A → Cemex Concretos → GRAVERO SAN GERMAN**

- 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

- **controller_controls_mine:** Puerto Rican Cement Company Inc → GRAVERO SAN GERMAN; 1950-01-01 to 2002-11-29; source msha-controller-operator-history
- **operator_operates_mine:** Hormigonera Mayaguezana Inc → GRAVERO SAN GERMAN; 1950-01-01 to 2006-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Jose A Bechara → GRAVERO SAN GERMAN; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jose A Bechara → Hormigonera Mayaguezana Inc; 1950-01-01 to 2006-06-30; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → GRAVERO SAN GERMAN; 2002-11-30 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cemex Concretos → GRAVERO SAN GERMAN; 2006-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Puerto Rican Cement Company Inc → Cemex Concretos; 2006-07-01 to 2002-11-29; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Cemex Concretos; 2006-07-01 to current/open; source msha-controller-operator-history