Engineer's 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: July 2, 2026 ON-GOING PROJECTS REVERSE OSMOSIS WATER TREATMENT PLANT DESIGN – CLINT WIENEN The RO Building floor slab has been completed. All of the concrete has been poured for the Clearwell as well except for housekeeping pads and fillets. The MCC room has been framed and the roof has been installed except for the steel roofing panels. Power has been switched over to the new electrical service. They are planning to have the MCC room insulated, drywalled, and painted within the next few weeks. They are also planning on installing the precast walls for the east addition and Clearwell pump house within the next month. Other work to be completed in the next coming weeks is the overhead door installations, relocation of the old plant generator to Well 5, and delivery of MCC panels. SYSTEMWIDE SANITARY SEWER MODEL – ERIC THOMPSON MSA has run the sanitary model with known development (not yet online, but already approved for connection) and revised LS pumping rates based on the City’s testing. Final model outputs are being integrated into a technical memo on model construction. MSA has also reviewed potential future sites for regional Lift Stations. This can support planning for growth areas based on the Comprehensive Plan. Information will be shared back with the City to support ongoing development and coordination for new lift stations to the west of the City limits. VILLAGE DRIVE & ROBERTS FERRY ROAD SIGNAL DESIGN – ANDREW INHELDER Project was awarded to Neumiller Electric, Inc on May 19th, 2026. Contractor and MSA are working through shop drawing submittal and review. A pre-construction meeting will be scheduled closer to the anticipated project start date. Substantial Completion date for the project is October 2, 2026. PROJECT UPDATE Page 1 of 5