Approval of Changer Order #18 - Boomerang Construction Group - North Park Road Improvements Project — E-6

City of Tiffin - Iowa Change Order Details 52-7662-615 Description STP-U-7662(615)--70-52, Letting Date- December 17, 2024 Prime Contractor Boomerang Corp. 13225 Circle Dr Suite A, Anamosa, IA 52205 Anamosa, IA, IA 52205 Change Order 18 Status Pending Date Created 08/25/2026 Type Non-Substantial Summary This change order corrects a modified subbase bid item quantity change from Change Order #17. For this work this needs to be a new non participating item and remove the increase to 0080 from change order #17. Change Order Description 0080: Decrease quantity for 2115-0100000 MODIFIED SUBBASE (Participating) 8270: Add item for 2115-0100200 MODIFIED SUBBASE, PLACE ONLY (Non-Participating) Awarded Project Amount $5,458,891.91 Authorized Project Amount $5,586,976.68 Change Order Amount $0.00 Revised Project Amount $5,586,976.68 B-Reason for Change Change Order Details: 08/26/2026 52-7662-615 Page 1 of 4