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Item No: 05F 1 City of Mounds View Staff Report Meeting Date: June 13, 2022 Type of Business: Consent Agenda Administrator Review: To: Honorable Mayor and City Council From: Don Peterson, Director of Public Works/Parks and Recreation Item Title/Subject: Resolution 9604, Approving Change Order #9 for Blasting Coating the interior of the Filter Tanks at the Main Water Treatment Plant Introduction: The City Council approved Resolution 9419 authorizing Municipal Builders Incorporated (MBI) to perform the rehabilitation, as perthe plans and specifications developed byAE2S for the main water treatment plant (WTP#1). This work is part of the Water Treatment Plant Rehabilitation Project (City Project No. 2016-006). Background/Discussion: As part of the project KLM Engineering was hired to perform inspections on both of the filter tanks; defects in the current coating were observed. In order to achieve the coating to properly adhere KLM recommended spot repairs be performed. KLM estimated that these spot repairs would last for 5-8 years until a full blasting and recoating would need to be performed on the interior walls and seams of the tanks. Public Works Staff requested a cost change order to be submitted for coating of the entire interior of the tanks along with an estimated cost at 5 years and 8 years. (If the coating were to be completed in 5 to 8 years, a required filter media removal with new media replacement would need be necessary therefore increasing the costs.) Further Discussion: MBI has submitted a cost for change order #9 for blasting and coating the interior of the tanks as required by KLM at WTP 1 of $59.995.00. Should the City wait for 5 years, the cost would be approximately $186,227.00; 8 years, approximately $220,938.00. AE2S has reviewed the change order proposal and has provided an amendment to the Owner -Engineer Agreement for inspecting the blasting and coating for a proposed cost of $7,500.00. Strategic Plan Strategy/Goal: Maintain and Plan for Infrastructure Improvements. Ensure Clean Water and Maintenance. Financial Impact: No financial Impact to the 2022 Budget. The 2022 Water Fund budgeted estimate of $800,000.00 for Water Treatment Plant and Engineering Design. i lhn ui�T><�s��nhl< C'n,�7iiiu�rrlt.