City Engineer's Report — L.1

City of Tiffin February 26, 2026 PROJECT UPDATE HIGHWAY 6 CONCEPT AND COST ESTIMATE – JAMES WATTERS At the time of update, a meeting on Wednesday, February 25th took place to discuss some water main changes at Main Street, Kimberlite Street, and the east end of the project. In the coming weeks, MSA will be sending City public works staff a revised watermain layout for review and comment. Final plans are progressing and adjustments will be made for any water main comments received. ***MSA needs council action on the following*** 1. Decide whether to fully signalize Croell Ave (Option 4) or install only unground infrastructure and construct offset right turn lane for NB Croell Ave traffic (Option 1). See below for context on previous discussions with council. MSA presented costs to Council at the November 18th meeting for the following items: 1. Fully Signalized Intersection - $400-$435k per intersection 2. Installation of underground equipment for future signalized intersection at Croell Ave = $80-$100k Council was split as to whether to fully signalize Croell Ave now or wait until future traffic growth warrants signalization. It was brought up that the left turn movement onto EB US 6 would still be present with a non-signalized option at Croell Ave and US 6 and whether public feedback would continue to be received on the safety of this intersection without signalization. There was also discussion from council as to whether an enhanced pedestrian crossing should be implemented at Stephens St in the form of a High-Intensity Activated Crosswalk system (HAWK Signal). See below image. MSA is looking for direction on the following: 1. Pursue investigations internally and with IaDOT and suitability for HAWK Signal at Stephens St. PROJECT UPDATE Page 2 of 6