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OW& RIVERSIDE PUBLIC UTILITIES Board Memorandum P U B L I C U T I L I T E BOARD OF PUBLIC UTILITIES DATE: January 21, 2011 ITEM NO: 6 SUBJECT: EMERGENCY WORK REQUIRED DUE TO STORM DAMAGE - AFFECTING TRXr SMISSION POLE J25862 NORTHERLY OF LA COLINA SUBSTATION - WOF A ORDER NO. 1110822 ISSUE: Board of Public Utilities approval is requested for Emergency Work Order No. 1110822 in accordance with Section 1202(2) (b) of the City of Riverside Charter. RECOMMENDATION: That the Board of Public Utilities approve the estimated capital expenditure of $150,000 for Emergency Work Order 1110822 in accordance with City Charter Section 1202(2)(b). BACKGROUND: Pole J25862 was inspected by contract crews on October 8, 2009 and found to be in good condition. In August 2010, the Riverside Police Department Aviation Unit reported a potential wash out hazard at the pole during a routine aerial patrol. The pole was re-inspected by Riverside Public Utilities (RPU) staff and found to be in danger of being undermined by storm water erosion. At that time, the pole was approximately 20 feet away from the vertical wall of the adjacent ravinelgulley and the vertical wall was about 20 feet high. Staff began initial design and investigation into Fish and Game permit requirements. On December 23, 2010, RPU was notified by Riverside County Flood Control about a transmission/feeder pole located north of La Colina Substation that appeared to be undermined by storm water runoff. Reinspect on of the pole by RPU staff determined that the storm water runoff had eroded approximately half of the soil and that the pole was in immediate danger of being undermined by continuing storm water flows. RPU staff has taken the following actions to resolve the issues. 1. RPU Engineering designed a relocation of J25862 to a more suitable location an incorporated the relocation of the circuit tie pole switch PS 507 from pole J25862 to J35072 to aid maintenance access. 2. RPU Contract Administration used a pre-approved Contractor under Time & Equipment rates to: a. Re-graded existing access road with 500 tons of road base for Pale J25862. b. Use native soil to rebuild the slope. c. Installed fiber paper and approximately 1,300 tons of rock to mitigate future erosion. These repairs were necessary due to the major storm, rain fall and flooding from the days before. This storm was classified as a 1 in 100 year flood". Access and stabilization work was performed starting on December 23, 2010 to ensure continued reliable electric service; and the pole relocation will be completed by January 31, 2011. Article XII. Department of Public Utilities of the Riverside City Charter; Section 1202. Same—Fowers and duties; (b)(2) allows work to be done under these circumstances and as soon as practicable thereafter be presented to the Board of Public Utilities for approval.