City Engineer Report — 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: May 1, 2026 ON-GOING PROJECTS REVERSE OSMOSIS WATER TREATMENT PLANT DESIGN – CLINT WIENEN The precast walls and ceiling for the RO Building have been installed. Rough-Ins for the underground plumbing and electrical are ongoing below the RO Building floor slab. The Contractor is planning to install the roof trusses for the RO Building in the next couple of weeks and pour the floor slab towards the end of the month. The slab and two (2) wall pours have been completed for the clearwell. They are also planning to have the clearwell concrete completed by the end of the month. They will also be pouring the footings and foundation walls for the existing water treatment plant expansion in the next few weeks. SYSTEMWIDE SANITARY SEWER MODEL – ERIC THOMPSON MSA is updating the land use data, to reflect known (but not yet completed) development in the City to be the new benchmark for existing conditions. The City is completing drawn down tests on the lift stations. Once completed, MSA will integrate the draw down results into the sanitary model, export outputs, and finalize the model construction. MSA is creating future growth maps and identifying key infrastructure placement for future development to be discussed with City. VILLAGE DRIVE & ROBERTS FERRY ROAD SIGNAL DESIGN – CHAD WAGNER Project is out to bid with bids due on May 14th 2026 at 10AM. PROJECT UPDATE Page 1 of 5