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LVA I= IL E V E 12 G, I. I F F <br />CITY VOF <br />DIER IDE <br />PUBLIC UTILITIES <br />RIVERSIDE PUBLIC UTILITIES <br />Board Memorandum <br />DATE: November 27, 2023 <br />BOARD OF PUBLIC UTILITIES <br />GENERAL MANAGER'S REPORT <br />SUBJECT: MONTHLY POWER SUPPLY REPORT — SEPTEMBER 30, 2023 <br />Monthly Power Usage: <br />The wholesale load (Vista Substation) for September was 198,147 MWh, which is a decrease <br />of 54,682 MWh in comparison to the same month in the previous year. Renewable generation <br />served 42.70% or 84,604 MWh of Riverside's wholesale load. Coal generation served 15.94% <br />or 31,578 MWh of the wholesale load. Nuclear energy covered 4.53% or 8,976 MWh, and <br />internal natural gas generation served 2.21% or 4,381 MWh of wholesale load in September. <br />Hydro generation represents 0.70% or 1,382 MWh of Riverside's wholesale load. Finally, the <br />balance for September was covered by Market Transactions, which represented 33.93% or <br />67,226 MWh. <br />Wholesale Resource Mix - September 2022 vs 2023 <br />Energy <br />2022 2023 <br />MWh MWh <br />Large Hydro 1,584 1,382 <br />Natural Gas 24,410 4,381 <br />Nuclear 9,312 8,976 <br />Coal 64,002 31,578 <br />Market Transactions* 85,991 67,226 <br />Renewables 67,530 84,604 <br />Wholesale Load (Vista) 252,829 198,147 <br />2023 <br />MWh <br />2022 <br />MWh <br />• Large Hydro • Natural Gas • Nuclear • Coal • Market Transactions* • Renewables <br />1 <br />1 <br />• <br />198,147 MWh <br />252,829 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 />