# Relationship history for MSHA mine 1302300

Current hierarchy: **CRH PLC → Hallett Materials → PCP #4**

- 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:** Rasmussen Group Inc → PCP #4; 1999-04-01 to 2001-08-10; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → PCP #4; 2001-08-11 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hallett Materials Inc → PCP #4; 2005-06-06 to 2008-01-02; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Hallett Materials Inc; 2005-06-06 to 2008-01-02; source msha-controller-operator-history
- **controller_controls_operator:** Rasmussen Group Inc → Hallett Materials Inc; 2005-06-06 to 2001-08-10; source msha-controller-operator-history
- **operator_operates_mine:** Hallett Materials → PCP #4; 2008-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → PCP #4; 2008-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Hallett Materials; 2008-01-03 to current/open; source msha-controller-operator-history