# Relationship history for MSHA mine 4702419

Current hierarchy: **Kurt  Croell → Croell Redi-Mix Inc → Croell Sand And 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: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **operator_operates_mine:** Croell Redi-Mix Inc → Croell Sand And Gravel; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Roger  Croell → Croell Sand And Gravel; 1950-01-01 to 2013-12-31; source msha-controller-operator-history
- **controller_controls_operator:** Roger  Croell → Croell Redi-Mix Inc; 1950-01-01 to 2013-12-31; source msha-controller-operator-history
- **controller_controls_mine:** Kurt  Croell → Croell Sand And Gravel; 2014-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Kurt  Croell → Croell Redi-Mix Inc; 2014-01-01 to current/open; source msha-controller-operator-history