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W A T E R • E N F IT G Y , i r e 31 RIVERSIDE PUBLIC UTILITIES PU BLIC UTILITIES Board Memorandum BOARD OF PUBLIC UTILITIES DATE: July 1, 2011 DIRECTOR'S REPORT ITEM NO: 22 SUBJECT: MONTHLY POWER SUPPLY REPORT—May 2011 POWER USAGE Total load requirements during May 2011 were 162,458 MWh, of which 179,940 MWh were provided by our resources and 17,482 MWh sales to the CAISO. The retail customer load for May 2011 (156,258 MWh) was 6.7% higher than the retail customer load in May 2010 (146,468 MWh). The actual peak system demand was 380 MW, compared to actual peak system demand of 308 MW last year. Energy returns were 0 MWh and 5,085 MWh were attributed to losses (3.61%). Green power supplied approximately 21.58% of our retail energy requirements. The City's generation resources were available during the month as follows: UNIT OPERATION IPP: IPP units 1 and 2 operated at 80% capacity factor for the month. PVNGS: Palo Verde units 1, 2 and 3 operated at 83%capacity factor for the month. SONGS: SONGS units 2 and 3 operated at 100% and 99% capacity factor respectively for the month. Hoover: 94% of RVSD's entitlement was met for the month. Clearwater: Clearwater's availability was 96%for the month. RERC: RERC Station (Units 1,2,3 and 4)availability was 53% for the month. Springs: Springs units 1, 2, 3 and 4 availability was 79% for the month. Salton Sea: The Salton Sea units operated at 97% capacity factor for the month. TRANSMISSION: Pacific DC: The South to North transmission line is currently derated to 975 MW(ETR 10131/2012)and the North to South transmission line is operational at 2,990 MW. Attached are the charts of daily peaks and the graphical comparison of demand and energy supplied from each resource for the months of May 2010 and May 2011. AA Attachments cc: Bradley J. Hudson, City Manager