# Relationship history for MSHA mine 5001838

Current hierarchy: **Colas S A → University Redi-Mix → Van Horn Crusher**

- 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:** Gordon  Crawley → Van Horn Crusher; 1995-03-01 to 2000-08-31; source msha-controller-operator-history
- **controller_controls_mine:** Colas S A → Van Horn Crusher; 2000-09-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** University Redi-Mix → Van Horn Crusher; 2006-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Colas S A → University Redi-Mix; 2006-05-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Gordon  Crawley → University Redi-Mix; 2006-05-19 to 2000-08-31; source msha-controller-operator-history