# Relationship history for MSHA mine 5400475

Current hierarchy: **Ruben  Hernandez → Gravero de San Lorenzo, LLC → Gravero de San Lorenzo, LLC**

- 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:** Gonrod, Inc. → Gravero de San Lorenzo, LLC; 2008-11-21 to 2012-07-04; source msha-controller-operator-history
- **controller_controls_mine:** Jose M  Gonzalez → Gravero de San Lorenzo, LLC; 2008-11-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jose M  Gonzalez → Gonrod, Inc.; 2008-11-21 to 2012-07-04; source msha-controller-operator-history
- **operator_operates_mine:** Victor Morales → Gravero de San Lorenzo, LLC; 2012-07-05 to 2015-07-02; source msha-controller-operator-history
- **controller_controls_mine:** Victor M  Morales → Gravero de San Lorenzo, LLC; 2012-07-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Victor M  Morales → Victor Morales; 2012-07-05 to 2015-07-02; source msha-controller-operator-history
- **controller_controls_mine:** Ruben  Hernandez → Gravero de San Lorenzo, LLC; 2014-10-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Gravero de San Lorenzo, LLC → Gravero de San Lorenzo, LLC; 2015-07-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Ruben  Hernandez → Gravero de San Lorenzo, LLC; 2015-07-03 to current/open; source msha-controller-operator-history