# Relationship history for MSHA mine 0503139

Current hierarchy: **Aggregate Industries PLC → Camas Colorado Inc → 35TH AVENUE PLANT**

- 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

- **operator_operates_mine:** Best-Way Paving Company → 35TH AVENUE PLANT; 1950-01-01 to 1998-05-14; source msha-controller-operator-history
- **controller_controls_mine:** Carl V  Hill Jr → 35TH AVENUE PLANT; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carl V  Hill Jr → Best-Way Paving Company; 1950-01-01 to 1998-05-14; source msha-controller-operator-history
- **controller_controls_mine:** Aggregate Industries PLC → 35TH AVENUE PLANT; 1997-05-14 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Camas Colorado Inc → 35TH AVENUE PLANT; 1998-05-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Aggregate Industries PLC → Camas Colorado Inc; 1998-05-15 to current/open; source msha-controller-operator-history