# Relationship history for MSHA mine 3503425

Current hierarchy: **CRH PLC → RiverBend Materials → RiverBend Materials Windsor**

- 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:** CRH PLC → RiverBend Materials Windsor; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Windsor Rock Products → RiverBend Materials Windsor; 1996-02-01 to 2019-04-14; source msha-controller-operator-history
- **controller_controls_mine:** James A  Monaghan Et Al → RiverBend Materials Windsor; 1996-02-01 to 2019-03-01; source msha-controller-operator-history
- **controller_controls_operator:** James A  Monaghan Et Al → Windsor Rock Products; 1996-02-01 to 2019-03-01; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → RiverBend Materials Windsor; 2019-03-02 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Windsor Rock Products; 2019-03-02 to 2019-04-14; source msha-controller-operator-history
- **operator_operates_mine:** RiverBend Materials → RiverBend Materials Windsor; 2019-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → RiverBend Materials; 2019-04-15 to current/open; source msha-controller-operator-history