09-20-2013 BPU RPT 07 - Laserfiche WebLink

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RIVERSIDE PUBLIC UTILITIES Board Memorandum PUBLIC UTILITIES BOARD OF PUBLIC UTILITIES DATE: September 20, 2013 ITEM NO: 7 SUBJECT: CONSTRUCTION OF THE MULBERRY BOOSTER PUMP STATION REHABILITATION PROJECT, BID NO. 7125 — INCREASE WORK ORDER NO. 1304150 ISSUE: The item for Board of Public Utilities consideration is approval of the additional capital expenditure in the amount of$50,000 for Work Order No. 1304150 to account for work in completing system connections. RECOMMENDATION: That the Board of Public Utilities approve additional funds of $50,000 for Work Order No. 1304150 for system connections. BACKGROUND: The Mulberry Booster Station (Mulberry) was constructed in 1924 to supply water to the Chicago 1100 Pressure Zone, which serves both the Eastside and the Hunter Industrial Park neighborhoods. Over the years, Mulberry has undergone numerous improvements, including at least nine pipelines modifications. Due to its age, inefficiency and inability to meet current demands, Mulberry was slated for rehabilitation and a major upgrade. On April 19, 2013, the Board of Riverside Public Utilities approved a capital expenditure of $542,500 for Work Order No. 1304150, which included a budget of $35,000 for station isolation and system connection work to be performed by City Forces. Mulberry is located adjacent to Applebee's Restaurant (Applebee's) in Downtown Riverside and shares the parking lot. In order to minimize disruption to Applebee's, City forces only work in the parking lot during the early morning hours. When City Forces began to install valves to isolate Mulberry, they encountered an electrical line that was closer to the water pipeline than expected. This conflict required that a new location be found to install the valve. With a limited window in which to work, City forces needed multiple work days to complete the installation of the valves and exhausted their budget before all their work was complete. As for the remaining work, excavations by the contractor have shown that it will require a substantial effort due to constricted space, horizontal and vertical alignment conflicts, deeper excavations and specialized fittings. The additional cost for work to be completed by City forces is estimated to be $50,000.