# Relationship history for MSHA mine 4104612

Current hierarchy: **Guillermo C  Juarez → Juarez Stone Inc → Rock Quarry**

- 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:** Juarez Stone Co. → Rock Quarry; 2006-07-19 to 2008-01-14; source msha-controller-operator-history
- **controller_controls_mine:** Guillermo C  Juarez → Rock Quarry; 2006-07-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Guillermo C  Juarez → Juarez Stone Co.; 2006-07-19 to 2008-01-14; source msha-controller-operator-history
- **operator_operates_mine:** Juarez Stone Inc → Rock Quarry; 2008-01-15 to 2013-02-16; source msha-controller-operator-history
- **controller_controls_mine:** Guillermo C  Juarez → Rock Quarry; 2008-01-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Guillermo C  Juarez → Juarez Stone Inc; 2008-01-15 to 2013-02-16; source msha-controller-operator-history
- **operator_operates_mine:** Juarez Stone Inc → Rock Quarry; 2013-02-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Guillermo C  Juarez → Rock Quarry; 2013-02-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Guillermo C  Juarez → Juarez Stone Inc; 2013-02-17 to current/open; source msha-controller-operator-history