# Relationship history for MSHA mine 0504641

Current hierarchy: **CRH PLC → Oldcastle SW Group, Inc. → Milner Pit**

- 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

- **controller_controls_mine:** CRH PLC → Milner Pit; 1998-01-05 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Precision Excavating, Inc. → Milner Pit; 1999-03-01 to 2024-05-22; source msha-controller-operator-history
- **controller_controls_mine:** David S  Zehner → Milner Pit; 1999-03-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** David S  Zehner → Precision Excavating, Inc.; 1999-03-01 to 2024-05-22; source msha-controller-operator-history
- **operator_operates_mine:** Oldcastle SW Group, Inc. → Milner Pit; 2024-05-23 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Oldcastle SW Group, Inc.; 2024-05-23 to current/open; source msha-controller-operator-history