01-20-2012 BPU RPT 05 - Laserfiche WebLink

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WATER ENERGY LIFE L3191& RIVERSIDE PUBLIC UTILITIES I-N Board Memorandum. P U B L I C U T I L I T I E S BOARD OF PUBLIC UTILITIES DATE: January 20, 2012 ITEM NO: 5 SUBJECT: CONSTRUCTION OF THE WATER TRANSMISSION MAIN VALVE REPLACEMENT PROJECT— PHASE I ISSUE: That the Board of Public Utilities consider approval of the capital expenditure in the amount of$500,000 to construct the Water Transmission Main Valve Replacement Project—Phase I. RECOMMENDATION: That the Board of Public Utilities approve the capital expenditure of$600,000 for Work Order No. 1210331, which includes all costs for design, construction, change order contingencies, construction management, inspection and geotechnical testing for the Water Transmission Main Valve Replacement Project—Phase 1. BACKGROUND: The Riverside Public Utilities Department (RPU) delivers water to customers through a vast array of underground transmission and distribution pipelines. The transmission system is the backbone of the water delivery network and plays an integral role in moving water to various regions throughout the City. The water transmission network is generally comprised of pipelines ranging in size from 15-inches to 72-inches in diameter. The transmission system also consists of isolation valves situated at strategic locations along the transmission pipelines that can be used to isolate portions of the pipes in the event of an emergency or for system maintenance. Many of these isolation valves are old and are showing signs of their age. This has become especially evident during several recent projects involving major system shutdowns when the valves were found not to function properly. Staff has identified several key valves that are in immediate need of replacement to enhance system reliability and operational effectiveness. Staff is in the process of identifying an additional round of valves to be replaced as a second phase of the project, which will occur sometime during the next winter season. Staff will seek approval from the Board for the second phase of the work at that time. The work of the subject project will generally entail removal and replacement of one 42-inch valve,three 30- inch valves, one 20-inch valve, along with all other related fittings and appurtenances at various locations throughout the City, more specifically shown on the attached project site map. The system shutdowns needed for this work will be carefully scheduled and coordinated by staff to minimize disruptions to the system. Construction bids for this work have been received from RPU's contractor panel.