# Relationship history for MSHA mine 2100876

Current hierarchy: **CRH PLC → Southern MN Construction → #0876 Dundas 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Larry V  Nurre → #0876 Dundas Wash Plant; 1988-07-01 to 2006-03-01; source msha-controller-operator-history
- **controller_controls_mine:** Gerald A Redman et al → #0876 Dundas Wash Plant; 1989-03-08 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Owatonna Construction Co. → #0876 Dundas Wash Plant; 1996-06-01 to 2006-03-22; source msha-controller-operator-history
- **controller_controls_operator:** Gerald A Redman et al → Owatonna Construction Co.; 1996-06-01 to 2006-03-22; source msha-controller-operator-history
- **controller_controls_operator:** Donald F Redman et al → Owatonna Construction Co.; 1996-06-01 to 2006-03-22; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → #0876 Dundas Wash Plant; 2006-03-02 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Southern Minnesota Construction Company, Inc → #0876 Dundas Wash Plant; 2006-03-23 to 2008-12-27; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Southern Minnesota Construction Company, Inc; 2006-03-23 to 2008-12-27; source msha-controller-operator-history
- **controller_controls_operator:** Larry V  Nurre → Southern Minnesota Construction Company, Inc; 2006-03-23 to 2006-03-01; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → #0876 Dundas Wash Plant; 2008-01-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Southern MN Construction → #0876 Dundas Wash Plant; 2008-12-28 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Southern MN Construction; 2008-12-28 to current/open; source msha-controller-operator-history