# Relationship history for MSHA mine 2101406

Current hierarchy: **Hanson PLC → Hanson Pipe & Products Minnesota Inc → KASOTA 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:** North Star Concrete Company → KASOTA PLANT; 1950-01-01 to 1998-10-14; source msha-controller-operator-history
- **controller_controls_mine:** William D Radichel et al → KASOTA PLANT; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** William D Radichel et al → North Star Concrete Company; 1950-01-01 to 1998-10-14; source msha-controller-operator-history
- **operator_operates_mine:** Hanson Pipe & Products Minnesota Inc → KASOTA PLANT; 1998-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Hanson PLC → KASOTA PLANT; 1998-10-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Hanson PLC → Hanson Pipe & Products Minnesota Inc; 1998-10-15 to current/open; source msha-controller-operator-history