Discussion and Consideration of Change Order #2 – Tricon Construction – Tiffin Water Treatment Facility Upgrade Project – Motion to Approve — K.4

www.triconcg.com April 1, 2026 746 58th Ave Ct SW Cedar Rapids, IA 52404 Clint Wienen MSA Professional Services Inc Corporate Office 400 Ice Harbor Dr 1230 East 12th Street Dubuque IA 52001 Dubuque, IA 52001 P 563.588.9516 Project: Tiffin Water Treatment Facility Upgrade F 563.588.9519 Re: COR # 8R *Combined Valve Revisions per attached. 12” Permeate Valve Addition and Butterfly Valve Deduct 20-A18, 20-A19, 20-A20 Mellen & Associates (679.00) Core & Main (633.75) Tricon (200.00) Sub-Total (1,512.75) OHP (75.64) General Liability Insurance (7.88) Bond (23.47) Total ($ 1,619.74) Please Note: The above costs include the previously submitted COR-009, which is now considered void. *Moving forward markup will be handled according to the specs as noted in Section 00 72 00 on Page 49 of 72 and will only be combined if the work is directly associated OR combined into a single Change Proposal. Approved By: Tom Shedek 4/1/2026 _______________________________________________________________________________________________________________________________________________ _______________________________________________________________ Project Manager – Tricon Construction Date _______________________________________________________________________________________________________________________________________________ _______________________________________________________________ Clint Wienen – MSA Professional Services Inc Date _______________________________________________________________________________________________________________________________________________ _______________________________________________________________ City of Tiffin Date