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A I= IL E V E R G Y I. I F F <br />- - <br />WI& <br />P U B L I C U T I L I T I E S <br />RIVERSIDE PUBLIC UTILITIES <br />BOARD OF PUBLIC UTILITIES <br />GENERAL MANAGER'S REPORT <br />Board Memorandum <br />DATE: AUGUST 14, 2023 <br />SUBJECT: MONTHLY POWER SUPPLY REPORT - JUNE 30, 2023 <br />Monthly Power Usage: <br />The wholesale load (Vista Substation) for June was 165,187 MWh, which is down 59,253 MWh <br />in comparison to the same month in the previous year. Renewable generation served 56.89% <br />or 93,975 MWh of Riverside's wholesale load. Next, our coal resource served 9.33% or 15,412 <br />MWh of the wholesale load. Nuclear energy covered 5.02% or 8,297 MWh of the wholesale load <br />in June. Natural gas generation represents a small part of Riverside's energy production at <br />1.38% or 2,288 MWh for June. Hydro generation has increased slightly due to capacity <br />availability improvements, and it currently represents 1.61% or 2,661 MWh of Riverside's <br />wholesale load. Finally, the balance of Riverside's wholesale load for June was Market <br />Transactions, which represented 25.76% or 42,554 MWh. <br />Energy <br />Large Hydro <br />Natural Gas <br />Nuclear <br />Coal <br />Market Transactions" <br />Renewables <br />Wholesale Resource Mix - JUNE 2023 vs 2022 <br />2022 <br />2023 <br />MWh <br />MWh <br />2023 <br />2,497 <br />2,661 <br />MWh <br />8,950 <br />2,288 <br />9,024 <br />8,297 <br />22,482 <br />15,412 2022 <br />MWh <br />84,021 <br />42,554 <br />97,465 <br />93,975 <br />■ Large Hydro ■ Natural Gas ■ Nuclear ■ Coal ■ Market Transactions* ■ Renewables <br />0 50,000 <br />100,000 150,000 <br />Wholesale Load (Vista) 224,440 165,187 MWh/Month <br />The Market Transaction category comprises bilateral power contracts and purchases(sales) from(to) the CAISO. <br />1Wh <br />1Wh <br />200,000 250,000 <br />