# Relationship history for MSHA mine 0405863

Current hierarchy: **CRH PLC → Oldcastle APG → Echo Mountain**

- 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:** Lightweight Aggregate Hauling → Echo Mountain; 2013-03-20 to 2025-01-02; source msha-controller-operator-history
- **controller_controls_mine:** Antonio  Perez → Echo Mountain; 2013-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Antonio  Perez → Lightweight Aggregate Hauling; 2013-03-20 to 2025-01-02; source msha-controller-operator-history
- **operator_operates_mine:** Oldcastle APG → Echo Mountain; 2025-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → Echo Mountain; 2025-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Oldcastle APG; 2025-01-03 to current/open; source msha-controller-operator-history