02-04-11 BPU RPT 09 - Laserfiche WebLink

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WATER I ENERGY I LIFE RIVERSIDE PUBLIC UTILITIES Board Memorandum P U B L I C U T I I I T I F S BOARD OF PUBLIC UTILITIES DATE: February 4, 2011 ITEM NO: 9 SUBJECT: ENGINEERING AND INSPECTION SERVICES FOR THE SAN BERNARDINO WATER SUPPLY PIPELINE CONDITION ASSESSMENT PROJECT ISSUE: That the Board of Public Utilities consider approval of a capital expenditure for Engineering and Inspection Services for the San Bernardino Water Supply Pipeline Condition Assessment Project. RECOMMENDATION: That the Board of Public Utilities approve a total capital expenditure for Work Order No.1109782 in an amount of$520,000, which includes all planning, project management, field support, pipeline inspection and engineering services for the San Bernardino Water Supply Pipeline Condition Assessment Project. BACKGROUND: The San Bernardino Water Supply Pipeline is an extremely critical facility for Riverside Public Utilities(RPU), as it delivers a significant portion of the City's water supply. This pipeline begins in the heart of the City of San Bernardino and makes its way southerly toward the City of Riverside through public street rights-of-way and easement corridors. It ultimately terminates at the Linden/Evans Reservoir Complex located at the corner of Linden Street and Cranford Avenue. The San Bernardino Water Supply Pipeline is roughly twelve miles in length and ranges in size from thirty to fifty-four inches in diameter. The original 1920's era San Bernardino Water Supply Pipeline was constructed of concrete pipe. Over the years, many segments of the original pipeline have been replaced with Cement Mortar Lined and Coated (CML&C) Steel Pipe. However, several miles of the vintage concrete pipe still remain. Leaks have occurred at several locations within the old concrete pipe segments. When a leak occurs, RPU is forced to perform repairs on an emergency basis, challenging RPU's ability to provide uninterrupted water service to customers. To better understand the overall condition of the remaining segments of concrete pipe within this transmission pipeline and to assist in planning replacements of these segments in the future, RPU desires to perform an evaluation of these sections to determine their condition and likelihood of failing in the near horizon. Under the proposed scope of work, the consultant will inspect manually and by closed circuit television (CCTV) approximately 4.6 miles of the transmission main. The consultant will provide all necessary personnel, equipment and permits to safely excavate the entry and exit points along the pipeline and restore (as necessary) any roadway surfaces. Cracks or other signs of distress within the pipeline will be carefully documented and recorded. Findings from the pipeline inspection will be used to prepare a report with recommendations and conclusions as to the condition of the pipeline segments. The work will occur during March 2011, to coincide with the scheduled pipeline shutdown for system connections on the Washington Street Transmission Pipeline Replacement Project,which is currently under construction.