# Relationship history for MSHA mine 2102957

Current hierarchy: **CRH PLC → Southern Minnesota Construction Company Inc → #401 Cedarapids Jaw Crusher-Portable**

- 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:** Richard C  Lundin  et al → #401 Cedarapids Jaw Crusher-Portable; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Lundin Construction Company Inc → #401 Cedarapids Jaw Crusher-Portable; 1987-04-01 to 1988-06-30; source msha-controller-operator-history
- **controller_controls_operator:** Richard C  Lundin  et al → Lundin Construction Company Inc; 1987-04-01 to 1988-06-30; source msha-controller-operator-history
- **operator_operates_mine:** Southern Minnesota Construction Company Inc → #401 Cedarapids Jaw Crusher-Portable; 1988-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Larry V  Nurre → #401 Cedarapids Jaw Crusher-Portable; 1988-07-01 to 2006-03-01; source msha-controller-operator-history
- **controller_controls_operator:** Larry V  Nurre → Southern Minnesota Construction Company Inc; 1988-07-01 to 2006-03-01; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → #401 Cedarapids Jaw Crusher-Portable; 2006-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Southern Minnesota Construction Company Inc; 2006-03-02 to current/open; source msha-controller-operator-history