08-22-2022 BPU RPT 06 - Laserfiche WebLink

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RIVERSIDE PUBLIC UTILITIES Board Memorandum BOARD OF PUBLIC UTILITIES DATE: AUGUST 22, 2022 SUBJECT: CONSTRUCTION OF THE ELEVENTH STREET WATER MAIN REPLACEMENT PROJECT WORK ORDER NO. 2217506 IN THE AMOUNT OF $586,000 ISSUE: Consider approval of Work Order No. 2217506 in the total amount of $586,000 for all engineering, construction, paving and construction contingency costs for the Eleventh Street Water Main Replacement Project. RECOMMENDATION: That the Board of Public Utilities approve Work Order No. 2217506 in the total amount of $586,000 for all engineering, construction, paving and construction contingency costs for the Eleventh Street Water Main Replacement Project. BACKGROUND: Riverside Public Utilities (RPU) budgets annually for the replacement of certain high-priority water pipelines which have been determined to have reached end of life. This determination is made based on parameters such as age, material, and maintenance records. RPU utilizes a data- driven, risk-based model to identify high-risk segments of distribution pipelines for replacement known as the Business Risk Exposure (BRE) model. The BRE model has been a useful tool to help prioritize water main replacement projects. An overview of the BRE model was presented to the RPU Water Committee on October 13, 2021. The Eleventh Street Water Main Replacement Project is part of RPU ongoing water main replacement program to replace old and high-priority water mains. The project area consists of existing 4-inch cast iron water pipelines that were installed in the 1920. These pipelines have experienced 16 leaks since 1988. Based on their leak history, age and size, these water pipelines have been ranked as high priorities for replacement to increase reliability of the water system and enhance fire flow. DISCUSSION: The work generally entails the construction of approximately 1,250 linear feet of 8-inch Polyvinyl Chloride (PVCO) pipe, 31 water services, two fire hydrants, and five system connections, along