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W A i E R E k E R G 5' RIVERSIDE PUBLIC UTILITIES Board Memorandum PUBLIC UTILITIES BOARD OF PUBLIC UTILITIES DATE: MARCH 5, 2015 ITEM NO: 8 SUBJECT: HARVEY LYNN SUBSTATION POWER TRANSFORMER AND SWITCH GEAR REPLACEMENT— INCREASE FUNDING FOR WORK ORDER NO. 1418023 ISSUE: The issue for Board of Public Utilities consideration is approval to increase funding for Work Order No. 1418023 in the amount of$350,000. RECOMMENDATION: That the Board of Public Utilities approve a $350,000 increase to Work Order No. 1418023. BACKGROUND: On March 1, 2014, in the midst of a severe Pacific rainstorm and lightning in the area, the Riverside Public Utilities (RPU) electrical system experienced an outage on three sub transmission lines and a severe fire at the Harvey-Lynn Substation on Schuyler Street in the La Sierra Neighborhood. As a result of the fire damage, the Harvey Lynn #3 transformer and switch gear, 69kV breaker#6 and one 69kV bus disconnect switch were destroyed. On March 21, 2014, the Board of Public Utilities approved Work Order No. 1418023 in the amount of $2,700,000 based on a preliminary cost estimate. At that time, the Board report noted that any additional facility modifications not identified in the initial scope of work used to prepare the estimate would increase the cost of repairs. As the project unfolded, staff identified additional scope to complete the project. The limited physical space around the replacement transformer T3 necessitated structural modifications to maintain adequate safety spacing at an estimated cost of $45,000. After complete analysis, the final seismic engineering required construction of a new transformer foundation at a cost of$125,000. Finally, additional distribution circuit work was necessary to adequately supply customers during the peak of summer 2014. This included temporary high voltage cable, switchgear field modifications, and additional circuit capacitors. The additional cost for this distribution work including labor and material is $180,000. Based on these costs, staff estimates a $350,000 increase in funds to Work Order No. 1418023 is required to complete the project. Work is progressing on schedule. The transformer was delivered in February 2015 and the new switchgear is expected in April 2095. The restoration project is scheduled to be completed in June 2015. FISCAL IMPACT: The increase to Work Order No. 1418023 is $350,000. Sufficient funds are available in the Public Utilities' Substation Equipment Replacement Account No. 6130000-470625.