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

Clint Wienen, PE | Senior Project Engineer MSA Professional Services, Inc. 100% Employee Owned +1 (563) 584-2897 From: Tom Shedek <[email protected]> Sent: Wednesday, February 25, 2026 10:41 AM To: Clint Wienen <[email protected]> Subject: FW: Tiffin WTP Low Lift Pumps - 0915659 Clint, Let me know your thoughts on this as a credit that Gary is proposing. Tom Tom Shedek, PMP | Project Manager TRICON CONSTRUCTION GROUP C: 913.238.6689 [email protected] From: Gary Ganoe <[email protected]> Sent: Wednesday, February 25, 2026 10:06 AM To: Tom Shedek <[email protected]> Cc: Andy Knapp <[email protected]>; Andrew Larson <[email protected]>; [email protected] Subject: RE: Tiffin WTP Low Lift Pumps - 0915659 Tom, Technically, the low lift pumps meet Hydraulic Institute Grade 2B. However, Clint is correct that there is a 4% di2erence in performance between the certified performance curve vs. the test curve. We are proposing to make up the di2erence in operating energy costs. Assuming 1000 hours run time per year per pump @ $0.06 per KWH. 8.1 BHP @ design point x 0.04 = 0.324 BHP 0.324 BHP x .763 divided by 91.7% motor e2iciency = .27 KW .27 KW x $0.06/KWH x 2000 hours of operation = $32.40 per year $32.40 per year x 10 years = $324.00 We are proposing a $324.00 credit. Advise if this seems reasonable. 3