# Relationship history for MSHA mine 0202948

Current hierarchy: **The Shepherd Family Living Trust; The Lin Irrevocable Trust → Kalamazoo Materials Inc → New Superior Quarry (*Abandoned)**

- 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:** Paul E  D'Alessio → New Superior Quarry (*Abandoned); 1999-10-01 to 2023-01-02; source msha-controller-operator-history
- **operator_operates_mine:** Kalamazoo Materials Inc → New Superior Quarry (*Abandoned); 2001-02-19 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Paul E  D'Alessio → Kalamazoo Materials Inc; 2001-02-19 to 2023-01-02; source msha-controller-operator-history
- **controller_controls_mine:** The Lin Irrevocable Trust et al → New Superior Quarry (*Abandoned); 2023-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** The Lin Irrevocable Trust et al → Kalamazoo Materials Inc; 2023-01-03 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** The Shepherd Family Living Trust et al → Kalamazoo Materials Inc; 2023-01-03 to current/open; source msha-controller-operator-history