# Relationship history for MSHA mine 3604373

Current hierarchy: **Pagnotti Enterprises Inc → No 1 Contracting Corp → Fleetwood Quarry & Sand 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: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **operator_operates_mine:** No 1 Contracting Corp → Fleetwood Quarry & Sand Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pagnotti Enterprises Inc → Fleetwood Quarry & Sand Plant; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pagnotti Enterprises Inc → No 1 Contracting Corp; 1950-01-01 to current/open; source msha-controller-operator-history