# Relationship history for MSHA mine 2800986

Current hierarchy: **George A  Cozzi → George A Cozzi Excavating & Paving → Cozzi Sand 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:** Formigli Corp → Cozzi Sand Pit; 1989-05-01 to 1990-11-19; source msha-controller-operator-history
- **controller_controls_mine:** Formigli Corp → Cozzi Sand Pit; 1989-05-01 to 1990-11-19; source msha-controller-operator-history
- **controller_controls_operator:** Formigli Corp → Formigli Corp; 1989-05-01 to 1990-11-19; source msha-controller-operator-history
- **operator_operates_mine:** George A Cozzi Excavating & Paving → Cozzi Sand Pit; 1990-11-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** George A  Cozzi → Cozzi Sand Pit; 1990-11-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** George A  Cozzi → George A Cozzi Excavating & Paving; 1990-11-20 to current/open; source msha-controller-operator-history