02-17-2012 BPU RPT 03 - Laserfiche WebLink

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RIVERSIDE PUBLIC UTILITIES Board Memorandum PUBLIC UTILITIES BOARD OF PUBLIC UTILITIES DATE: February 17, 2012 ITEM NO: 3 SUBJECT: OVERLOOK PARKWAY FEEDER RELIEF AND SWITCH REPLACEMENT -WORK ORDER NO. 1242317 ISSUE: Board of Public Utilities approval is requested for Work Order No. 1202317. RECOMMENDATION: That the Board of Public Utilities approve the estimated capital expenditure of$225,000 for Work Order No. 1202317 to install underground conduits, structures, cables, and a pad-mount switch with junction cabinets. BACKGROUND: As part of the Circuit 1533 load relief project in 2010, a load transfer scheme from Circuit 1533 to Circuit 1540 via switches along Overlook Parkway was proposed. Upon performing the recommended load transfer, Electric crews discovered that below grade switches OS3-126 and switch GS3-210 were inoperable due to oil leakage and other maintenance and operational problems. Operation of these devices in this state and in a confined space is un-safe. Switching capabilities are crucial for sectionalizing and transferring large residential loads to Circuit 1540. It is Department policy to install switching devices in a pad-mounted configuration for ease of operation, minimize outages thus improving reliability and reduce crew exposures to switching in a confined space. This project will install conduit and structures to replace the two outdated and defective underground switches with a single pad-mounted switch, as well as three pad-mount junction cabinets and all associated cables. The pad-mounted equipment was designed and will be installed with consideration given to the surrounding aesthetics. The electrical engineering was performed by Riverside Public Utility (RPU)forces. All civil work including trenching, conduits, foundations and other infrastructure work will be performed by a contractor through the competitive bid process. Electrical work will be performed by RPU field forces. FISCAL IMPACT: The capital expenditure for the entire project is estimated to be $225,000 and includes all construction, contingencies, construction management, inspection and design, as summarized in the following table: % of Total Construction-Electric Conduit& Structures $100,675 45% Contingency 10% $10,068 4% Construction-Electric Overhead and Underground $89,158 40% Design, Construction Management, Inspection $25,000 11% Subtotal: $224,901 100 % ,