# Relationship history for MSHA mine 5400096

Current hierarchy: **Jorge A  Diaz-Mayoral → PUERTO RICO ASPHALT LLC → PUERTO RICO ASPHALT-BAYAMON**

- 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:** Ramos Hermanos Inc → PUERTO RICO ASPHALT-BAYAMON; 1950-01-01 to 2017-07-31; source msha-controller-operator-history
- **controller_controls_mine:** Ramos Hermanos Inc → PUERTO RICO ASPHALT-BAYAMON; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ramos Hermanos Inc → Ramos Hermanos Inc; 1950-01-01 to 2017-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Cantera Metro LLC → PUERTO RICO ASPHALT-BAYAMON; 2017-08-01 to 2018-12-05; source msha-controller-operator-history
- **controller_controls_mine:** Albert  Vanniekerk → PUERTO RICO ASPHALT-BAYAMON; 2017-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Albert  Vanniekerk → Cantera Metro LLC; 2017-08-01 to 2018-12-05; source msha-controller-operator-history
- **operator_operates_mine:** Bayamon Aggregates & Recycling, Inc. → PUERTO RICO ASPHALT-BAYAMON; 2018-12-06 to 2023-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Omar  Rodriguez → PUERTO RICO ASPHALT-BAYAMON; 2018-12-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Omar  Rodriguez → Bayamon Aggregates & Recycling, Inc.; 2018-12-06 to 2023-08-22; source msha-controller-operator-history
- **controller_controls_mine:** Jorge A  Diaz-Mayoral → PUERTO RICO ASPHALT-BAYAMON; 2020-06-16 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** PUERTO RICO ASPHALT LLC → PUERTO RICO ASPHALT-BAYAMON; 2023-08-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jorge A  Diaz-Mayoral → PUERTO RICO ASPHALT LLC; 2023-08-23 to current/open; source msha-controller-operator-history