# Relationship history for MSHA mine 1001709

Current hierarchy: **CRH PLC → Idaho Concrete Company → Rental Portable Screen 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

- **operator_operates_mine:** Treasure Valley Concrete Inc → Rental Portable Screen Plant; 1986-02-01 to 1998-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Donald J  Nelson → Rental Portable Screen Plant; 1986-02-01 to 1998-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Donald J  Nelson → Treasure Valley Concrete Inc; 1986-02-01 to 1998-04-30; source msha-controller-operator-history
- **controller_controls_mine:** U S Aggregate Inc → Rental Portable Screen Plant; 1986-06-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Monroc Inc → Rental Portable Screen Plant; 1998-05-01 to 2002-02-05; source msha-controller-operator-history
- **controller_controls_operator:** U S Aggregate Inc → Monroc Inc; 1998-05-01 to 2002-02-05; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Rental Portable Screen Plant; 2000-03-27 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Idaho Concrete Company → Rental Portable Screen Plant; 2002-02-06 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Idaho Concrete Company; 2002-02-06 to current/open; source msha-controller-operator-history