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WATER <br />I ENERGY 1 1 I F 1 <br />RIVERSIDE PUBLIC UTILITIES <br />PUBLIC U1 I1 11 I I -S <br />BOARD OF PUBLIC UTILITIES <br />GENERAL MANAGER'S REPORT <br />Board Memorandum <br />DATE: OCTOBER 23, 2023 <br />SUBJECT: MONTHLY POWER SUPPLY REPORT — AUGUST 31, 2023 <br />Monthly Power Usage <br />The wholesale load (Vista Substation) for August was 253,855 MWh, which is a decrease of <br />22,288 MWh in comparison to the same month in the previous year. Renewable generation <br />served 27.58% or 70,012 MWh of Riverside's wholesale load. Coal generation served 15.77% <br />or 40,031 MWh of the wholesale load. Nuclear energy covered 3.58% or 9,096 MWh, and <br />internal natural gas generation served 6.61% or 16,771 MWh of wholesale load in August. Hydro <br />generation represents 0.65% or 1,638 MWh of Riverside's wholesale load. Finally, the balance <br />for August was covered by Market Transactions, which represented 45.82% or 116,307 MWh. <br />Wholesale Resource Mix - August 2022 vs 2023 <br />■ • <br />Energy <br />2022 2023 <br />MWh MWh <br />Large Hydro 1,653 1,638 <br />Natural Gas 27,976 16,771 <br />Nuclear 9,190 9,096 <br />Coal 77,836 40,031 <br />Market Transactions* 70,567 116,307 <br />Renewables 88,921 70,012 <br />Wholesale Load (Vista) 276,143 253,855 <br />2023 <br />MWh <br />2022 <br />MWh <br />■ Large Hydro ■ Natural Gas ■ Nuclear ■ Coal ■ Market Transactions* ■ Renewables <br />253,855 MWh <br />276,143 MWh <br />0 <br />50,000 100,000 150,000 200,000 250,000 300,000 <br />MWh/Month <br />* The Market Transaction category comprises bilateral power contracts and purchases(sales) from(to) the CAISO. <br />