11-14-2022 BPU RPT 07 - Laserfiche WebLink

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W A Y E R i E N E it L v i i RIVERSIDE PUBLIC UTILITIES Board Memorandum P U B L I C U i I L 17 I E S BOARD OF PUBLIC UTILITIES DATE: NOVEMBER 14, 2022 SUBJECT: BINGHAM AND WOLFE AVENUES WATER MAIN REPLACEMENT PROJECT— APPROVAL OF WORK ORDER NO. 2205705 IN THE AMOUNT OF $1,216,000 ISSUE: Consider approving Work Order No. 2205705 in the amount of $1,216,000 for all engineering, construction, paving and construction contingency costs for the Bingham and Wolfe Avenues Water Main Replacement Project. RECOMMENDATION: That the Board of Public Utilities approve Work Order No. 2205705 in the total amount of $1,216,000 for all engineering, construction, paving and construction contingency costs for the Bingham and Wolfe Avenues Water Main Replacement Project. BACKGROUND: Riverside Public Utilities (RPU) budgets annually to replace high-priority water pipelines that have reached their end -of -life. An end -of -life determination is based on parameters such as pipeline age, material, and maintenance records via a Business Risk Exposure (BRE) model, which identifies high-risk water distribution pipeline segments needing replacement. The BRE model has proven valuable in identifying and prioritizing water main replacement projects and was presented on October 13, 2021, to the RPU Water Committee. The Bingham and Wolfe Avenues Water Main Replacement Project is part of RPU's ongoing water main replacement program to replace old and high-priority water mains. The project area consists of 8 -inch ductile iron water pipelines installed in 1998. These pipelines have experienced 20 leaks since 2005. This unusually high number of leaks and premature failure of the pipelines is suspected to have been accelerated by soil conditions in the vicinity of this project that are severely corrosive to ferrous material. DISCUSSION: The work generally entails the construction of approximately 3,285 linear feet of 8 -inch Polyvinyl Chloride (PVCO) pipe, 72 water services, eight fire hydrants, and three system connections, along with all necessary fittings, appurtenances, and related incidental work, which will be installed