City Engineer's Report — L.1

Agenda Item: L-1 PROJECT UPDATE  A Review of MSA Projects in Your Community City of Tiffin, IA CLIENT LIAISON: Andrew Inhelder, PE Office: 319.364.4773 Cell: 515.802.0906 [email protected] DATE: February 26, 2026 ON-GOING PROJECTS REVERSE OSMOSIS WATER TREATMENT PLANT DESIGN – CLINT WIENEN Painting within the existing treatment plant has been completed. The new RO Building foundation walls have been poured. They are scheduled to replace the media in the existing pressure filters within the next month. They are also scheduled to begin excavating for the new Clear Well Building. SYSTEMWIDE SANITARY SEWER MODEL – ERIC THOMPSON MSA met with the City on 2/10/26 to discuss the sanitary model construction, preliminary findings, and next steps. MSA will be updating the model to incorporate known planned development (e.g. locations where sanitary connections have already been agreed upon); this will be the new benchmark for “existing” conditions. City staff agreed to completing draw down tests on two lift stations, so that the model will reference the current pumping capacity at these locations. MSA will re-run the sanitary model and provide visual results back to staff. The City will review the findings and select the preferred “level of service” storm event, to be referenced for future development planning. MSA will draft a technical report summarizing the model construction and have a “live” model to reference as new development occurs in Tiffin. VILLAGE DRIVE & ROBERTS FERRY ROAD SIGNAL DESIGN – CHAD WAGNER MSA is coordinating with utilities to work through any potential utility conflicts. MSA also coordinated with Jim Connor on Tiffin-specific signal equipment. MSA is waiting on a few more equipment cut sheets from Jim Connor and then will submit final plans for City Staff review and move to bid the project. PROJECT UPDATE Page 1 of 6