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W A T E R I E K E R G Y I L I <br /> W— RIVERSIDE PUBLIC UTILITIES <br /> 61&r <br /> Board Memorandum <br /> P U B L I C U T I L I T I E S <br /> BOARD OF PUBLIC UTILITIES DATE: July 16, 2010 <br /> DIRECTOR'S REPORT <br /> ITEM NO: 24 <br /> SUBJECT: MONTHLY POWER SUPPLY REPORT— May 2010 <br /> POWER USAGE <br /> Total energy requirements during May 2010 were 176,552 MWh, of which 146,468 MWh were attributed to retail <br /> customer load and the remainder being sales to wholesale parties and system losses. The retail load for May 2010 was <br /> 9.6% lower than the retail energy load in May 2009 (162,056 MWh). The actual peak system demand was 308 MW, <br /> compared to actual peak system demand of 423 MW last year. Sales to wholesale parties, losses and energy returns <br /> represented 20.5% of the total energy requirement as compared to 27.4% for last year. Sales to wholesale parties <br /> accounted for 3,730 MWh, which included 2,980 MWh in sales to the ISO. Energy returns were 22,222 MWh and 4,131 <br /> MWh were attributed to losses (3.32%). Green power supplied approximately 23.3% of our retail energy requirements. <br /> The City's generation resources were available during the month as follows: <br /> UNIT OPERATION <br /> IPP: IPP units 1 and 2 operated at 82% capacity factor for the month. <br /> PVNGS: Palo Verde units 2 and 3 operated at 67% capacity factor for the month. Palo Verde Unit 1 was on <br /> refueling outage through 5/24/10. <br /> SONGS: SONGS unit 2 & 3 operated at 98% & 100% capacity factor respectively for the month. <br /> Hoover: Hoover operated at 76% availability for the month due to low water elevation in Lake Mead and various <br /> scheduled unit maintenances. <br /> Springs: Springs units 1, 2, 3 and 4 availability was 100% for the month. <br /> RERC: RERC Units 1 &2 availability was 99.4% for the month each. <br /> Salton Sea: The Salton Sea units operated at 88% capacity factor for the month. <br /> TRANSMISSION: <br /> Pacific DC: The South to North line is de-rated due to repairs to damage caused by the Station Fire through <br /> 06/30/2010. The North to South line is fully operational. <br /> Attached are the charts of daily peaks and the graphical comparison of demand and energy supplied from each resource <br /> for the months of May 2009 and May 2010. <br /> AA <br /> Attachments <br /> cc: Bradley J. Hudson, City Manager <br />