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W A T E fit E N E R G Y - t I L E MW& RIVERSIDE PUBLIC UTILITIES Board Memorandum PUBLIC UTILITIES BOARD OF PUBLIC UTILITIES DATE: May 6, 2011 ITEM NO: 3 SUBJECT: PURCHASE OF 69 KV SWITCHYARD ABOVE GRADE EQUIPMENT AND MATERIALS FOR CASA BLANCA SUBSTATION -WORK ORDER NO. 1016403 ISSUE: Board of Public Utilities approval is requested for the purchase of 69 kV switchyard above grade equipment and materials for the Casa Blanca Substation. RECOMMENDATION: That the Board of Public Utilities approve the purchase of 69 kV switchyard above grade equipment and materials for the Casa Blanca Substation from Hamby Young in Aurora, Ohio, in the amount of$435,714. BACKGROUND: On September 17, 2010, the Board of Public Utilities approved Work Order No. 1016403 authorizing the purchase of a power transformer, switchgear equipment, and circuit breakers at Casa Blanca Substation. At the time of that approval, it was also noted that staff would return to the Board of Public Utilities for additional approvals of equipment purchases as required. The Casa Blanca Substation was identified for conversion as part of Riverside Public Utilities' (RPU)Electric System Master Plan (ESMP) in order to keep pace with growth and maintain the reliability of RPU's electric distribution system. Subsequently, the Casa Blanca Power Project (CBPP) was initiated to carry out the ESMP recommendation to convert the Casa Blanca Substation from a 33-4 kV facility to a 69-12 kV facility. The CBPP includes the upgrade and replacement of the existing Casa Blanca Substation located at 7615 Evans Street(see Attachment 1). Furthermore, the CBPP includes the extension of 69 kV subtransmission lines and the installation of new 12 kV feeders. Ultimately, the CBPP will provide the necessary electrical infrastructure for reliable electric distribution service to Casa Blanca and the surrounding areas. Also, the Casa Blanca Substation will directly interconnect with the Freeman and Harvey Lynn Substations, and the balance of RPU's 69 kV transmission system. This procurement for 69 kV switchyard above grade equipment and materials at Casa Blanca Substation includes steel structures, surge arrestors,disconnect switches,voltage transformers, insulators, bus, cable, connectors, cable trench, cable tray, anchor bolts, and other miscellaneous items required for the construction of the Casa Blanca Substation.