# Relationship history for MSHA mine 4503775

Current hierarchy: **Pete  Maresca → Maresca Sand and Gravel → Green Stone Quarry**

- 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:** Maresca Sand and Gravel → Green Stone Quarry; 2017-11-10 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Pete  Maresca → Green Stone Quarry; 2017-11-10 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Pete  Maresca → Maresca Sand and Gravel; 2017-11-10 to current/open; source msha-controller-operator-history