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cnr of <br />RIVERSIDE <br />RIVERSIDE PUBLIC UTILITIES <br />PUBLIC UTILITIES <br />BOARD OF PUBLIC UTILITIES <br />GENERAL MANAGER'S REPORT <br />SUBJECT: MONTHLY POWER SUPPLY REPORT - DECEMBER 31, 2023 <br />Board Memorandum <br />DATE: FEBRUARY 26, 2024 <br />Monthly Power Usage: <br />The wholesale load (Vista Substation) for December was 160,366 MWh, a decrease of 3,202 <br />MWh compared to the same month in the previous year. Renewable generation served 43.89% <br />or 70,385 MWh of Riverside's wholesale load. Coal generation served 9.96% or 15,966 MWh of <br />the wholesale load. Nuclear energy covered 5.85% or 9,384 MWh. Internal natural gas <br />generation served 0.71% or 1,142 MWh of wholesale load in December. Hydro generation <br />represents 0.68% or 1,087 MWh of Riverside's wholesale load. Riverside's emissions free and <br />renewable resources utilization increased slightly in December 2023 compared to December <br />2022. Finally, the balance for December was covered by Market Transactions, which <br />represented 38.91% or 62,402 MWh of the load. <br />Wholesale Resource Mix - December 2022 vs 2023 <br />Energy <br />2022 2023 % 0 <br />MWh MWh <br />Large Hydro 1,220 1,087 -10.90% <br />Natural Gas 1,476 1,142 -22.64% <br />Nuclear 9,360 9,384 0.26% <br />Coal 62,752 15,966 -74.56% <br />Market Transactions* 20,177 62,402 209.27% <br />Renewables 68,582 70,385 2.63% <br />Wholesale Load (Vista) 163,568 160,366 -1.96% <br />2023 <br />MWh <br />2022 <br />MWh <br />• Large Hydro Natural Gas • Nuclear • Coal ■ Market Transactions* • Renewables <br />• <br />160,366 MWh <br />- ' <br />163,568 MWh <br />0 20,000 40,000 60,000 80,000 100,000 120,000 140,000 160,000 180,000 <br />* The Market Transaction category comprises bilateral power contracts and purchases(sales) from(to) the CAISO. <br />Daily & Monthly Load & Temperature Trends <br />MWh/Month <br />Weather has a significant impact on electricity demand, especially the variable temperature. <br />Typically, as temperatures increase, electricity demand will also increase, and vice versa. The <br />charts below graphically extrapolate the correlation between weather and electricity demand. <br />December 2023 was warmer than the previous year during the first half of the month. The <br />