# Relationship history for MSHA mine 4104465

Current hierarchy: **Rogers Group Inc → Rogers Group Inc. → Box Canyon Sand & 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:** Rogers Group Inc → Box Canyon Sand & Gravel; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Thomas Redi- Mix. Co., Inc. → Box Canyon Sand & Gravel; 2004-03-29 to 2006-12-31; source msha-controller-operator-history
- **controller_controls_mine:** John W  Thomas → Box Canyon Sand & Gravel; 2004-03-29 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John W  Thomas → Thomas Redi- Mix. Co., Inc.; 2004-03-29 to 2006-12-31; source msha-controller-operator-history
- **operator_operates_mine:** Thomas Sand & Gravel Co., Inc. → Box Canyon Sand & Gravel; 2007-01-01 to 2019-02-07; source msha-controller-operator-history
- **controller_controls_mine:** John W  Thomas → Box Canyon Sand & Gravel; 2007-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** John W  Thomas → Thomas Sand & Gravel Co., Inc.; 2007-01-01 to 2019-02-07; source msha-controller-operator-history
- **operator_operates_mine:** Rogers Group Inc. → Box Canyon Sand & Gravel; 2019-02-08 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Rogers Group Inc → Rogers Group Inc.; 2019-02-08 to current/open; source msha-controller-operator-history