Change Order No 1 & PCA - Pinhook WTP Guaranteed Savings Contract Proj No. 119-003 - Bowen

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INTER-OFFICE MEMORANDUM DEPARTMENT OF PUBLIC WORKS DIVISION OF ENGINEERING TO: Theresa Heffner, Clerk Board of Public Works FROM: Rebecca Plantz, Project Engineer SUBJECT: Project Completion, Project No. 119-003 Pinhook Water Treatment Plant Guaranteed Savings Contract DATE: August 31, 2023 The Guaranteed Savings Contract with Bowen Engineering, Corporation was effective on February 9, 2021, setting the guaranteed maximum price for the cost of work at $1,785,000, including Bowen’s fixed fee of $132,200. The scope of work based on American Structurepoint Basis of Design, Preliminary Drawings, and Valve Priority Matrix was filter rehabilitation, valve replacement, and clearwell cleaning. The performance guarantee was projected over a 20-year window through stipulated savings. Savings were estimated based on an energy baseline on valves leaking finished water, backwash pumps running more than necessary, and historical data. These savings will be reported to the Department of Local Government Finance by Bowen on the City’s behalf for the next 20 years as required by IC 36-1-12.5-10. One element on the return on savings in the GSC approach came from the filter rehabilitation where the original scope was identified as media retainer cap replacements. Soon after notice to proceed, it was found that the caps could be rehabilitated through an acid clean rather than replacement. Overall, the filter throughput was improved. All valves that were originally prioritized were replaced except for the filter bypass valve and air scour systems. Savings also allowed a list of structural and general building improvements to be completed. The GSC approach promoted collaborative problem solving, permitted flexibility as unknowns arise, addressed far more scope than expected, avoided budget overrun, avoided multiple shutdowns, and established a base contract for future projects. This project was awarded prior to the enactment of the City’s MWBE program and therefore, no goals were associated with this project. Overall, the success of the Pinhook Water Treatment Plant Guaranteed Savings Contract provided benefits to the asset and funds supporting it. Please call with your questions (5998).