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L3RIVERSIDE PUBLIC UTILITIES 19& PUBLIC UTILITIES Board Memorandum BOARD OF PUBLIC UTILITIES DATE: July 20, 2012 DIRECTOR'S REPORT ITEM NO: 20 SUBJECT: MONTHLY POWER SUPPLY REPORT- May 2012 POWER USAGE Total load requirements (including losses) during May 2012 were 162,491 MWh and 17,593 MWh of purchases from the CAISO, of which 144,898 MWh were provided by our resources and other purchases. The retail customer load for May 2012 (159,189 MWh) was 1.9% higher than the retail customer load in May 2011 (156,258 MWh). The actual peak system demand was 422 MW, compared to actual peak system demand of 380 MW last year. Energy returns were 0 MWh and 2,883 MWh were attributed to losses (4.66%). Green power supplied approximately 8.75% of our retail energy requirements. The City's generation resources were available during the month as follows: UNIT OPERATION IPP: I P P units 1 and 2 operated at 28.98° capacity factor for the month. PVNGS: Palo Verde units 1, 2 and 3 operated at 98.01% capacity factor for the month. SONGS: Bath SONGS units 2 and 3 operated at 0% capacity factor for the month. Hoover: 100% of RVSD's entitlement was met as compared to WAPA's Master Schedule (dated 6116111). Clearwater: Clearwater's availability was 97.18%for the month. RERC: RERC Station (Units 1,2,3 and 4) availability was 78.44%for the month. Springs: Springs units 1, 2, 3 and 4 availability was 35.62%for the month. Salton Sea: The Salton Sea units operated at 38.90% capacity factor for the month. TRANSMISSION: Pacific DC: The South to North transmission line is currently derated to 975 MW (ETR 12/3112012) 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 2011 and May 2012. AA Attachments cc: Scott C. Barber, City Manager