# Relationship history for MSHA mine 3003029

Current hierarchy: **CRH PLC → Callanan Industries Inc → Ravena Plant  #2**

- 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 → Ravena Plant  #2; 1985-04-01 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Jointa Lime Company → Ravena Plant  #2; 1991-11-01 to 1995-12-20; source msha-controller-operator-history
- **controller_controls_mine:** D A Collins Construction Company Inc → Ravena Plant  #2; 1991-11-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** D A Collins Construction Company Inc → Jointa Lime Company; 1991-11-01 to 1995-12-20; source msha-controller-operator-history
- **operator_operates_mine:** Callanan Industries Inc → Ravena Plant  #2; 1995-12-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** CRH PLC → Callanan Industries Inc; 1995-12-21 to current/open; source msha-controller-operator-history