# Relationship history for MSHA mine 2103714

Current hierarchy: **CRH PLC → Southern MN Construction → El Jay Portable 6 x 20 Screener**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-18T09:31:49.615908+00:00

## Valid-time edges

- **controller_controls_mine:** CRH PLC → El Jay Portable 6 x 20 Screener; 2008-01-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Southern MN Construction → El Jay Portable 6 x 20 Screener; 2010-08-09 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Southern MN Construction; 2010-08-09 to current/open; source msha-controller-operator-history