# Relationship history for MSHA mine 0504832

Current hierarchy: **CRH PLC → Oldcastle SW Group Inc → Wash Plant #5**

- 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 → Wash Plant #5; 1998-01-05 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Southern Ute Indian Tribe → Wash Plant #5; 2004-01-28 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Sky Ute Sand & Gravel, LLC → Wash Plant #5; 2005-12-19 to 2011-04-14; source msha-controller-operator-history
- **controller_controls_operator:** Southern Ute Indian Tribe → Sky Ute Sand & Gravel, LLC; 2005-12-19 to 2011-04-14; source msha-controller-operator-history
- **operator_operates_mine:** Oldcastle SW Group Inc → Wash Plant #5; 2011-04-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Oldcastle SW Group Inc; 2011-04-15 to current/open; source msha-controller-operator-history