# Relationship history for MSHA mine 3502885

Current hierarchy: **Knife River Corporation → Morse Brothers Inc → DEER ISLAND 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: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **controller_controls_mine:** Morse Brothers Inc → DEER ISLAND PLANT; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Deer Island Sand & Gravel Company → DEER ISLAND PLANT; 1979-01-01 to 1983-09-14; source msha-controller-operator-history
- **controller_controls_mine:** Louis J  Fasano  et al → DEER ISLAND PLANT; 1979-01-01 to 1989-02-13; source msha-controller-operator-history
- **controller_controls_operator:** Louis J  Fasano  et al → Deer Island Sand & Gravel Company; 1979-01-01 to 1983-09-14; source msha-controller-operator-history
- **operator_operates_mine:** Dietz Brothers Inc → DEER ISLAND PLANT; 1983-09-15 to 1985-02-20; source msha-controller-operator-history
- **controller_controls_mine:** Darold  Dietz  et al → DEER ISLAND PLANT; 1983-09-15 to 1985-02-20; source msha-controller-operator-history
- **controller_controls_operator:** Darold  Dietz  et al → Dietz Brothers Inc; 1983-09-15 to 1985-02-20; source msha-controller-operator-history
- **operator_operates_mine:** Deer Island Sand & Gravel Company → DEER ISLAND PLANT; 1985-02-21 to 1989-02-13; source msha-controller-operator-history
- **controller_controls_operator:** Louis J  Fasano  et al → Deer Island Sand & Gravel Company; 1985-02-21 to 1989-02-13; source msha-controller-operator-history
- **operator_operates_mine:** Deer Island Materials → DEER ISLAND PLANT; 1989-02-14 to 1992-05-25; source msha-controller-operator-history
- **controller_controls_mine:** Bob  Hendrickson → DEER ISLAND PLANT; 1989-02-14 to 1992-05-25; source msha-controller-operator-history
- **controller_controls_operator:** Bob  Hendrickson → Deer Island Materials; 1989-02-14 to 1992-05-25; source msha-controller-operator-history
- **operator_operates_mine:** Morse Brothers Inc → DEER ISLAND PLANT; 1992-05-26 to 1998-03-04; source msha-controller-operator-history
- **controller_controls_operator:** Morse Brothers Inc → Morse Brothers Inc; 1992-05-26 to 1998-03-04; source msha-controller-operator-history
- **operator_operates_mine:** Morse Brothers Inc → DEER ISLAND PLANT; 1998-03-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** MDU Resources Group Inc → DEER ISLAND PLANT; 1998-03-05 to 2023-05-31; source msha-controller-operator-history
- **controller_controls_operator:** MDU Resources Group Inc → Morse Brothers Inc; 1998-03-05 to 2023-05-31; source msha-controller-operator-history
- **controller_controls_mine:** Knife River Corporation → DEER ISLAND PLANT; 2023-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Knife River Corporation → Morse Brothers Inc; 2023-06-01 to current/open; source msha-controller-operator-history