# Relationship history for MSHA mine 1302045

Current hierarchy: **CRH PLC → Hallett Materials → PCP #6**

- 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:** Roy  Rohlin → PCP #6; 1950-01-01 to 2005-04-04; source msha-controller-operator-history
- **operator_operates_mine:** Rohlin Construction Company Inc → PCP #6; 1985-05-01 to 2005-09-05; source msha-controller-operator-history
- **controller_controls_operator:** Roy  Rohlin → Rohlin Construction Company Inc; 1985-05-01 to 2005-04-04; source msha-controller-operator-history
- **controller_controls_mine:** Rasmussen Group Inc → PCP #6; 1999-04-01 to 2001-08-10; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → PCP #6; 2001-08-11 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → PCP #6; 2005-04-05 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Rohlin Construction Company Inc; 2005-04-05 to 2005-09-05; source msha-controller-operator-history
- **operator_operates_mine:** Hallett Materials Inc → PCP #6; 2005-09-06 to 2008-01-03; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Hallett Materials Inc; 2005-09-06 to 2008-01-03; source msha-controller-operator-history
- **controller_controls_operator:** Rasmussen Group Inc → Hallett Materials Inc; 2005-09-06 to 2001-08-10; source msha-controller-operator-history
- **controller_controls_mine:** CRH PLC → PCP #6; 2008-01-03 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Hallett Materials → PCP #6; 2008-01-04 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Hallett Materials; 2008-01-04 to current/open; source msha-controller-operator-history