# Relationship history for MSHA mine 3501002

Current hierarchy: **CRH PLC → RiverBend Materials → RiverBend Materials Turner South**

- 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 Turner South; 1950-01-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** River Bend Sand & Gravel → RiverBend Materials Turner South; 1950-01-01 to 1986-04-30; source msha-controller-operator-history
- **controller_controls_mine:** Elmo Contractors Ltd Et Al → RiverBend Materials Turner South; 1950-01-01 to 1986-04-30; source msha-controller-operator-history
- **controller_controls_operator:** Elmo Contractors Ltd Et Al → River Bend Sand & Gravel; 1950-01-01 to 1986-04-30; source msha-controller-operator-history
- **operator_operates_mine:** River Bend Sand & Gravel Company → RiverBend Materials Turner South; 1986-05-01 to 2006-06-30; source msha-controller-operator-history
- **controller_controls_mine:** J C Compton Company → RiverBend Materials Turner South; 1986-05-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** J C Compton Company → River Bend Sand & Gravel Company; 1986-05-01 to 2006-06-30; source msha-controller-operator-history
- **operator_operates_mine:** RiverBend Materials → RiverBend Materials Turner South; 2006-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → RiverBend Materials; 2006-07-01 to current/open; source msha-controller-operator-history