# Relationship history for MSHA mine 5400326

Current hierarchy: **Jorge  Contreras → Sophie Juana → Aguadilla Rocks & Gravel**

- 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

- **controller_controls_mine:** Teresa  Sordo → Aguadilla Rocks & Gravel; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Cantera Aguadilla Inc → Aguadilla Rocks & Gravel; 1990-08-01 to 2002-02-24; source msha-controller-operator-history
- **controller_controls_operator:** Teresa  Sordo → Cantera Aguadilla Inc; 1990-08-01 to 2002-02-24; source msha-controller-operator-history
- **controller_controls_mine:** Ernesto  Del Valle → Aguadilla Rocks & Gravel; 1998-02-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Empresas Del Valle → Aguadilla Rocks & Gravel; 2002-02-25 to 2008-05-13; source msha-controller-operator-history
- **controller_controls_operator:** Ernesto  Del Valle → Empresas Del Valle; 2002-02-25 to 2008-05-13; source msha-controller-operator-history
- **operator_operates_mine:** Cantera Coralina Inc → Aguadilla Rocks & Gravel; 2008-05-14 to 2020-07-20; source msha-controller-operator-history
- **controller_controls_mine:** Jose A  Tamayo → Aguadilla Rocks & Gravel; 2008-05-14 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jose A  Tamayo → Cantera Coralina Inc; 2008-05-14 to 2020-07-20; source msha-controller-operator-history
- **operator_operates_mine:** Sophie Juana → Aguadilla Rocks & Gravel; 2020-07-21 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Jorge  Contreras → Aguadilla Rocks & Gravel; 2020-07-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jorge  Contreras → Sophie Juana; 2020-07-21 to current/open; source msha-controller-operator-history