# Relationship history for MSHA mine 0405583

Current hierarchy: **Daniel E  Sezzi → Sezzi Concrete & Materials Inc. → Standish Pit**

- 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:** Sezzi Concrete & Materials Inc. → Standish Pit; 2004-03-24 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Daniel E  Sezzi → Standish Pit; 2004-03-24 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Daniel E  Sezzi → Sezzi Concrete & Materials Inc.; 2004-03-24 to current/open; source msha-controller-operator-history