11-16-12 BPU RPT 08 - Laserfiche WebLink

Home

W A T E R E N E R G Y ! I c ! -� RIVERSIDE PUBLIC UTILITIES Board Memorandum PUBLIC UTILITIES BOARD OF PUBLIC UTILITIES DATE: November 16, 2012 ITEM NO: 8 SUBJECT: CONSTRUCTION OF THE LINDEN RESERVOIR PIPING IMPROVEMENT PROJECT— AWARD OF BID NO. 7116 ISSUE: That the Riverside Board of Public Utilities consider approval of a contract award for the construction of the Linden Reservoir Piping Improvement Project, Bid No. 7116. RECOMMENDATIONS: That the Board of Public Utilities: I. Approve the capital expenditure of $838,660 for Work Order No. 1221023, which includes all design, construction,change order contingencies,system connections,construction management, inspection and geotechnical testing for the Linden Reservoir Piping Improvement Project, Bid No. 7116; and 2. Award a contract for the construction of the Linden Reservoir Piping Improvement Project, Bid No. 7116 to the lowest responsive bidder,C.P.Construction Company, Inc.,of Ontario,California,in the amount of$594,235. BACKGROUND: The existing 16 million gallon (MG) Linden Reservoir was originally constructed in 1927, and it operates in conjunction with the existing Evans Reservoir as a major source for the City of Riverside's water supply system. Linden Reservoir has undergone several renovation projects over the years, most recently in the 1980's which involved an extensive overhaul of the reservoir's concrete lining system. The Linden-Evans Reservoir complex is located on the east side of Cranford Avenue and south of Linden Street in the City of Riverside. A booster pump station, known as Linden Booster Station, also resides on this site and delivers water to the University Pressure Zone. On May 7, 2010, the Riverside Board of Public Utilities approved a construction contract for the Evans Reservoir Replacement Project along with a budget of$5,000,000 to replace Linden Reservoir's roof. On May 4, 2012, the Board approved a Professional Services Agreement with URS Corporation to evaluate various roof replacement options for Linden Reservoir, and to perform the design and construction management services forthe selected alternative. The design for this project is underway with construction of the replacement roof expected to begin in the third quarter of 2013, The existing piping configuration atthe Linden-Evans Complex has caused many operational challenges over the years. Since there is no direct connection from the reservoir outlet piping to the Linden Booster Station, the water travels several thousand feet through the existing pipeline network before it finally makes its way back to the Linden Booster Station. This arrangement causes a significant amount of pressure inefficiencies in the system, making it difficult to utilize the booster station to its full capacity and reducing the operational storage available at the Linden-Evans Complex. Currently,the reservoir water levels can be lowered only half way without affecting water pressure in the Downtown area.