# Relationship history for MSHA mine 0901131

Current hierarchy: **Larry R  Cook → Blue Ribbon Quarries Inc → BLUE RIBBON 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** Blue Ribbon Quarries Inc → BLUE RIBBON QUARRY; 2000-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Vince  Fernandez → BLUE RIBBON QUARRY; 2000-05-01 to 2007-01-22; source msha-controller-operator-history
- **controller_controls_operator:** Vince  Fernandez → Blue Ribbon Quarries Inc; 2000-05-01 to 2007-01-22; source msha-controller-operator-history
- **controller_controls_mine:** Larry Ray  Cook  et al → BLUE RIBBON QUARRY; 2007-01-23 to 2018-02-01; source msha-controller-operator-history
- **controller_controls_operator:** Larry Ray  Cook  et al → Blue Ribbon Quarries Inc; 2007-01-23 to 2018-02-01; source msha-controller-operator-history
- **controller_controls_operator:** Ted  Sims  et al → Blue Ribbon Quarries Inc; 2007-01-23 to 2018-02-01; source msha-controller-operator-history
- **controller_controls_mine:** Larry R  Cook → BLUE RIBBON QUARRY; 2018-02-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Larry R  Cook → Blue Ribbon Quarries Inc; 2018-02-02 to current/open; source msha-controller-operator-history