# Relationship history for MSHA mine 3002540

Current hierarchy: **Max A Guardi → Max Gravel, LLC → Illion Gorge 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:** Ferdula Gravel Products Inc → Illion Gorge Pit; 1980-07-01 to 2024-02-25; source msha-controller-operator-history
- **controller_controls_mine:** Joseph T  Ferdula → Illion Gorge Pit; 1980-07-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Joseph T  Ferdula → Ferdula Gravel Products Inc; 1980-07-01 to 2024-02-25; source msha-controller-operator-history
- **operator_operates_mine:** Max Gravel, LLC → Illion Gorge Pit; 2024-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Max A Guardi → Illion Gorge Pit; 2024-02-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Max A Guardi → Max Gravel, LLC; 2024-02-26 to current/open; source msha-controller-operator-history