SR 06:006 - Laserfiche WebLink

stations, including six pumps, five water storage tanks, and several miles of water mains that range in size from 6 to 12 inches in diameter. The majority of the water lines and tanks were also constructed in 1964. The consulting firm recommended the replacement of the pump station piping, electrical equipment, mechanical equipment, portions of the pump station buildings, the recoating of three of the five water tanks and the installation of cathodic protection to the water mains to guard against pipe corrosion. The City has phased the refurbishment recommended by the consulting firm and has completed the recoating of the three water tanks, the installation of the cathodic protection for the existing water mains, and the replacement of sections of pipe at the pipe bends along Santos Ranch Road. Remaining, is the replacement of the three pump stations, including the six pumps and related mechanical and electrical equipment. The pump station portion of this overall improvement project was funded in FY 1999-00 ($100,000), FY 2000-01 ($450,000), and FY 2001-02 ($450,000), from the Water Replacement fund, based on an estimate of the project scope obtained from the original consulting engineer's report, dated February, 1998. This report only provided a preliminary list of the pump stations' components without the benefit of a full engineering assessment and project design. In addition, and more importantly, the original estimate included only a partial rehabilitation of the pumping stations, not complete reconstruction. Recent Design and Construction Bid Efforts On March 18, 2003, the City Council awarded a consultant contract to Tetra Tech Inc. to prepare design plans and specifications for the Santos Ranch Road Pump Station improvements. The project scope had significantly changed since the 1998 report estimate, to include a complete reconstruction of the pump stations based upon a detailed review of pump station components in the field, and the fact that the City's Utility Operations Division had experienced a number of pipeline leaks and multiple repairs within and around the pumping stations since 1998. The pump station reconstruction project will replace the piping, valving, pumps, pump cans, and electrical equipment for all three pump stations, and will also upgrade the existing Pacific Gas and Electric Company (PG&E) electrical service from an old "Y" system to the more reliable "Delta" system. Also included in the project is a block-wall building structure for each station, which includes foundation slab, a small water tank at one station, site grading, storm drainage system, utility line relocation, and a new operational control system at each of the pump stations. The project was designed, advertised and put out to public bid earlier this year. However, on February 15, 2005, staff recommended and City Council approved the rejection of all bids, to re-engineer and redesign the project to reduce costs, and re-bid the project. The previous SR 06:006 Page 3 of 5