Engineer's Report

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: October 30, 2025 ON-GOING PROJECTS REVERSE OSMOSIS WATER TREATMENT PLANT DESIGN – CLINT WIENEN The sanitary manholes and sanitary sewer lines have been installed and tested. The existing electric service has been moved to a temporary position to be clear for the building/structure construction to begin. Construction on concrete electrical pads is next on the schedule. Regular construction meetings have been scheduled to ensure project progress. A Water Treatment Financial Assistance Program (WTFAP) grant application in the amount of $500,000 was submitted to Iowa Finance Authority on October 21st. Anticipated award announcements is in December/January. HIGHWAY 6 CONCEPT AND COST ESTIMATE – JAMES WATTERS Coordination with franchise utilities in the right-of-way remains ongoing. MSA is still pursuing responses from utility coordinators who missed the June 16th due date for Preliminary work plans. Work with the DOT Right-of-Way staff has been ongoing regarding the fit of the design within existing right- of-way. Several small adjustments have been made to ditch slopes and sidewalk near the “Hawk Wash” property on the southeast corner of US6 and Croell Avenue. MSA presented a traffic operations analysis to the City Council during the October 21 st work session, and reviewed the traffic operations analysis at Croell Ave and Kimberlite St intersections with US 6. Several intersection improvement alternatives were discussed and the Council expressed support for installing a traffic signal at Kimberlite Street, along with a combination of an offset right-turn lane for westbound US 6 to northbound Croell Avenue traffic. The possibility of installing underground signal infrastructure at Croell Avenue to accommodate a potential future signal was also discussed. A construction cost estimate for these alternatives will be provided at next council meeting. SYSTEMWIDE SANITARY SEWER MODEL – ERIC THOMPSON MSA reviewed metering data for both dry weather and wet weather events. Sewer sheds have been delineated to each manhole with the system and reviewed for locations with either missing connectivity to add in detail from plan sets. Efforts are underway to identify key locations with missing pipe inverts to finalize the data entry requirements for modeling. PROJECT UPDATE Page 1 of 4