# Relationship history for MSHA mine 0405530

Current hierarchy: **Brandt  Robertson → Alliance Ready Mix Inc → Alliance Ready Mix Inc**

- 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:** Ozena Valley Ranch Sand & Gravel → Alliance Ready Mix Inc; 2002-08-08 to 2007-07-26; source msha-controller-operator-history
- **controller_controls_mine:** Michael  Virgilio → Alliance Ready Mix Inc; 2002-08-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Michael  Virgilio → Ozena Valley Ranch Sand & Gravel; 2002-08-08 to 2007-07-26; source msha-controller-operator-history
- **operator_operates_mine:** Ozena Valley Ranch Sand and Gravel → Alliance Ready Mix Inc; 2007-07-27 to 2008-09-16; source msha-controller-operator-history
- **controller_controls_mine:** Anthony  Virgilio → Alliance Ready Mix Inc; 2007-07-27 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Anthony  Virgilio → Ozena Valley Ranch Sand and Gravel; 2007-07-27 to 2008-09-16; source msha-controller-operator-history
- **operator_operates_mine:** Alliance Ready Mix Inc → Alliance Ready Mix Inc; 2008-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Brandt  Robertson → Alliance Ready Mix Inc; 2008-09-17 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brandt  Robertson → Alliance Ready Mix Inc; 2008-09-17 to current/open; source msha-controller-operator-history