02-04-11 BPU RPT 08 - Laserfiche WebLink

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W A T E R I E N E R 5 Y , L I F E RIVERSIDE PUBLIC UTILITIES Board Memorandum P U B L I C U T I L I T I E S BOARD OF PUBLIC UTILITIES DATE: February 4, 2011 ITEM NO: 8 SUBJECT: CONSTRUCTION OF THE 8-INCH WATER MAIN REPLACEMENT PROJECT ON IVANHOE, RUTLAND AND REYNARD AVENUES ISSUE: That the Board of Public Utilities consider approval of the capital expenditure in the amount of$1,387,000 to construct the 8-inch Water Main Replacement Project on Ivanhoe, Rutland and Reynard Avenues. RECOMMENDATION: That the Board of Public Utilities approve the capital expenditure of$1,387,000 for Work Order No. 0814461, which includes all design and construction costs for the 8-inch Water Main Replacement Project on Ivanhoe, Rutland and Reynard Avenues. BACKGROUND: The work identified will be constructed by the Water Division's field forces. This project is part of the Riverside Public Utilities Department's(RPU)ongoing water main replacement program to replace aging and undersized water mains and improve fire protection. In particular, there has been a long history of leaks along the segments of pipeline to be replaced as part of this project. The work will generally entail the construction of approximately 5,400 linear feet of eight-inch ductile iron pipe, thirteen fire hydrants and one- hundred twenty-five domestic water services, as well as all other related fittings and appurtenances on Ivanhoe, Rutland and Reynard Avenues, more specifically shown on the attached project site map. Once the new water pipelines are installed, RPU will be responsible for trench repaving. The trench repaving will be in accordance with Publics Works paving standards. However, the exact scope of the paving work will be specifically defined after the pipeline construction has begun and the actual trench limits are established in the field. A budgetary estimate for the paving work has been included in this authorization. The actual amount will be reported at a future date after bids for the paving work have been received from RPU's paving contractor's panel with a recommendation to award the project. Basis of Design The project adheres to RPU's adopted design criteria for network pipelines, which specifies a maximum design velocity of six feet per second at peak hour demands (Ref. 2005 Water Master Plan, Table 7-1). A 24-hour simulation was performed using H2O Map software and the Hydraulic Model produced with the 2005 Water Master Plan. Average Day, Maximum Day and Peak Hour demands for existing and future scenarios were simulated and run through the network in order to arrive at the appropriate pipeline diameters for the project. The water pipelines for this project were engineered for ductile iron pipe, as this is RPU's standard design practice for potable water distribution pipelines sized 12-inches in diameter or smaller.