Reports from City Personnel — 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: July 31, 2025 ON-GOING PROJECTS REVERSE OSMOSIS WATER TREATMENT PLANT DESIGN – CLINT WIENEN The mass fill has been completed and MSA continues to monitor the settlement plates. TriCon cannot proceed with construction until it is determined that the settlement is at an acceptable level. The alternate trail has been paved as well. HIGHWAY 6 CONCEPT AND COST ESTIMATE – JAMES WATTERS Coordination with franchise utilities in the right-of-way remains ongoing. MSA continues to pursue responses from utility coordinators who missed the June 16th due date for Preliminary work plans. MSA is also working on a set of environmental documents for the DOT and gathering information to perform an operational analysis for the intersection of Croell Avenue and US Highway 6. SYSTEMWIDE SANITARY SEWER MODEL – ERIC THOMPSON Flow meters continue to collect data in select locations within the sanitary sewer. One meter was removed and recalibrated after seeing variability in flows during non-rain events, suggesting debris/calibration issues. GIS data continues to be updated with missing invert information. Next steps will be importing the GIS data into PCSWMM to start model development. Land use classification and sewersheds are also ready to incorporate into the model. NORTH PARK ROAD IMPROVEMENTS – JAMES WATTERS Machine paving on the roundabout, roundabout legs, the Frontage Road, and the main line south of the roundabout has been completed. Hand pours for a number of fillet and intersection areas are in progress. With the pedestrian underpass covered, and the end sections have been poured, the next portion of the road to be paved is the section from the roundabout to the Oak Hill entrance. Both school sites remain accessible only from the north via the Oak Hill entrance. It is currently anticipated that when school resumes in August, access by car and bus to Tiffin Elementary will be open from both directions for each school. It is not yet known if both lanes will be open to traffic by the time school resumes. Temporary pavement will be placed to transition vehicles from existing pavement to new pavement near the Oak Hill entrance. Remaining work for Stage 1 and 2 areas such as sidewalk/trail, median, roadway lighting, etc., is anticipated to be completed in the fall. PROJECT UPDATE Page 1 of 3