# Relationship history for MSHA mine 4703144

Current hierarchy: **Stephen W Verrette → Marinette Concrete Products → Marinette Concrete Wash Plant**

- 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:** Cni Companies Inc → Marinette Concrete Wash Plant; 1998-06-01 to 2005-08-25; source msha-controller-operator-history
- **controller_controls_mine:** Curtis  Streblow → Marinette Concrete Wash Plant; 1998-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Curtis  Streblow → Cni Companies Inc; 1998-06-01 to 2005-08-25; source msha-controller-operator-history
- **operator_operates_mine:** Marinette Concrete Products → Marinette Concrete Wash Plant; 2005-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Stephen W Verrette → Marinette Concrete Wash Plant; 2005-08-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Stephen W Verrette → Marinette Concrete Products; 2005-08-26 to current/open; source msha-controller-operator-history