# Relationship history for MSHA mine 3503596

Current hierarchy: **CRH PLC → River Bend Mtls → RiverBend Materials RiverBend West**

- 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:** Jerry H  Walling → RiverBend Materials RiverBend West; 1950-01-01 to 2007-04-23; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → RiverBend Materials RiverBend West; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Salem Black Top & Asphalt Paving → RiverBend Materials RiverBend West; 2004-08-06 to 2008-07-31; source msha-controller-operator-history
- **controller_controls_operator:** Jerry H  Walling → Salem Black Top & Asphalt Paving; 2004-08-06 to 2007-04-23; source msha-controller-operator-history
- **controller_controls_mine:** Rinker Group Ltd → RiverBend Materials RiverBend West; 2007-04-24 to 2007-07-09; source msha-controller-operator-history
- **controller_controls_operator:** Rinker Group Ltd → Salem Black Top & Asphalt Paving; 2007-04-24 to 2007-07-09; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → RiverBend Materials RiverBend West; 2007-07-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Salem Black Top & Asphalt Paving; 2007-07-10 to 2008-07-31; source msha-controller-operator-history
- **operator_operates_mine:** Cemex → RiverBend Materials RiverBend West; 2008-08-01 to 2013-02-17; source msha-controller-operator-history
- **controller_controls_mine:** Cemex S A → RiverBend Materials RiverBend West; 2008-08-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Cemex S A → Cemex; 2008-08-01 to 2013-02-17; source msha-controller-operator-history
- **operator_operates_mine:** River Bend Mtls → RiverBend Materials RiverBend West; 2013-02-18 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → River Bend Mtls; 2013-02-18 to current/open; source msha-controller-operator-history