A government authority in Illinois is seeking qualified vendors to provide engineering services focused on sanitary sewer system modeling. The selected consultant will support system planning, operations, and capital improvement decision-making by either modifying an existing model or developing a new one based on the City's comprehensive GIS data.

The scope requires developing or updating a model that includes all sanitary sewers 8 inches in diameter and larger, ensuring full compatibility with the City's GIS and maintaining overall model integrity. Additional tasks include performing both dry-weather and wet-weather flow calibration using relevant rainfall and flow data, evaluating model performance, and refining parameters to achieve acceptable calibration results.

This initiative relies on accurate and comprehensive GIS information currently held by the City and aims to enhance modeling capabilities for future infrastructure decisions.