Change Order and PCA - WWTP Degrit Yard Piping Proj No 123-031A - HRP Construction

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INTER -OFFICE MEMORANDUM DEPARTMENT OF PUBLIC WORKS DIVISION OF ENVIRONMENTAL SERVICES TO: Members of the Board of Public Works Michael Schmidt, Assistant City Attorney Public Works Theresa Heffner, Clerk of the Board of Public Works FROM: Jacob M. Klosinski, P.E., Assistant City Engineer SUBJECT: Agenda Request —Change Order No. 1 & Project Completion Affidavit 121-046 WWTP Compressor Building Masonry Improvements (PROJ00000435 / PR-00030459 / PO-0030075) DATE: April 29, 2025 The Division of Engineering and Division of Wastewater recommend the Board of Public Works approval of Change Order No. 1 (FINAL), the Project Completion Affidavit, and closeout documents for Project No. 123-031A WWTP Yard Piping Improvements. Change Order No. 1 Summary Additional Hydro Excavation to Expose Existing Utilities (Unforeseen Condition): • Multiple subcontractors provided hydro excavation services to expose existing utilities in a congested area between tanks. Many of the utility locations were unknown due to inaccurate record drawings. Any of the utilities identified that were no longer in use were removed during the excavation and hydro excavation work instead of adding additional costs to protect or restore abandoned facilities. • Cost Increase: $35,000.00 3-inch Reuse Water Line Repair: • A 3-inch reuse water main ruptured during construction that required pavement removal, excavation, repair and pavement restoration. This was completed by the contractor since they were on -site and readily available to assist with the repair. • Cost Increase $24,000.00 Adjustment in Quantities • 6" WAS and Sludge Pipe Remove, reduced quantity by 167 LFT, Deduct $8,350.00 • 8" Sludge Pipe, Remove, reduced quantity by 2 LFT, Deduct $120.00 • 6" Ductile Iron Pipe, reduced quantity by 170 LFT, Deduct $28,220.00 • 8" Ductile Iron Pipe, reduced quantity by 5 LFT, Deduct $1,300.00 • 6" Ductile Iron 90 Deg Horizontal Bend, reduced quantity by 2 EACH, Deduct $11,000.00 • 8" Ductile Iron Transition Coupling, added quantity 1 EACH, Increase $9,000.00 • 5' Sidewalk, Concrete, 4 IN, reduced quantity by 32 LFT, Deduct $1,664.00 • Mulched Seeding and Sodding, increased quantity by 176 SYS, Increase $4,400.00 • Net Cost Adjustment for Unit Quantities, Cost Reduction:-$37,254.00 Change Order No. 1 Net Adjustment • Cost Increase: $21,746.00