# Relationship history for MSHA mine 2102933

Current hierarchy: **Greg  Bruening → Bruening Rock Products Inc. → WASH PLANT NO 3**

- 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:** Greg  Bruening → WASH PLANT NO 3; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Curtis G Roverud et al → WASH PLANT NO 3; 1950-01-01 to 2004-02-04; source msha-controller-operator-history
- **operator_operates_mine:** Knife River Midwest LLC → WASH PLANT NO 3; 1985-03-01 to 2009-03-22; source msha-controller-operator-history
- **controller_controls_operator:** Curtis G Roverud et al → Knife River Midwest LLC; 1985-03-01 to 2004-02-04; source msha-controller-operator-history
- **controller_controls_operator:** Jeff C Roverud et al → Knife River Midwest LLC; 1985-03-01 to 2004-02-04; source msha-controller-operator-history
- **controller_controls_mine:** MDU Resources Group Inc → WASH PLANT NO 3; 2004-02-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** MDU Resources Group Inc → Knife River Midwest LLC; 2004-02-05 to 2009-03-22; source msha-controller-operator-history
- **operator_operates_mine:** Bruening Rock Products Inc. → WASH PLANT NO 3; 2009-03-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Greg  Bruening → Bruening Rock Products Inc.; 2009-03-23 to current/open; source msha-controller-operator-history