# Relationship history for MSHA mine 5100224

Current hierarchy: **Deborah A  Wilderman → Pacific Aggregate → Portable 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:** MDU Resources Group Inc → Portable Plant; 1985-10-01 to 2023-05-31; source msha-controller-operator-history
- **operator_operates_mine:** Hawaiian Cement → Portable Plant; 1997-03-01 to 1998-02-10; source msha-controller-operator-history
- **controller_controls_operator:** MDU Resources Group Inc → Hawaiian Cement; 1997-03-01 to 1998-02-10; source msha-controller-operator-history
- **operator_operates_mine:** Industrial Parts Hawaii Inc → Portable Plant; 1998-02-11 to 2003-03-10; source msha-controller-operator-history
- **controller_controls_mine:** Lawrence E  Wilderman → Portable Plant; 1998-02-11 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lawrence E  Wilderman → Industrial Parts Hawaii Inc; 1998-02-11 to 2003-03-10; source msha-controller-operator-history
- **operator_operates_mine:** Pacific Aggregate → Portable Plant; 2003-03-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lawrence E  Wilderman → Portable Plant; 2003-03-11 to 2021-09-05; source msha-controller-operator-history
- **controller_controls_operator:** Lawrence E  Wilderman → Pacific Aggregate; 2003-03-11 to 2021-09-05; source msha-controller-operator-history
- **controller_controls_mine:** Deborah A  Wilderman → Portable Plant; 2021-09-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Deborah A  Wilderman → Pacific Aggregate; 2021-09-06 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Knife River Corporation → Portable Plant; 2023-06-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Knife River Corporation → Hawaiian Cement; 2023-06-01 to 1998-02-10; source msha-controller-operator-history