Plummeting reservoir levels could soon force Oroville hydropower offline

Julia Wick – July 21, 2021

A major California hydroelectric power plant could soon stop generating power amid worsening drought conditions.

According to state water officials, the Edward Hyatt Powerplant at Lake Oroville could go offline as soon as August or September — a time frame that would coincide with a feared power crunch this summer. The plant, which opened in the late 1960s, has never been forced offline by low lake levels before.

“I think it’s a bit shocking,” said Jordan Kern, a professor at the department of forestry and environmental resources at North Carolina State University. “The fact that it’s projected to go offline just speaks to how severe the drought is,” said Kern, who studies how power grids are impacted by extreme weather.

California Energy Commission spokesperson Lindsay Buckley said the commission is actively planning for the power plant to go offline this summer. But the Hyatt power plant is far from the only hydroelectric power source in the state that will likely be affected by California’s extreme weather.

On July 1, the energy commission, along with the California Independent System Operator and the California Public Utilities Commission, released a letter touching on the drought-driven hydropower losses expected this year, which are occurring amid historic heat event driven by climate change. According to the system operator, drought conditions could reduce the state’s hydropower capacity by up to approximately 1,000 megawatts in the coming months.

The Hyatt power plant is designed to produce up to 750 megawatts of power but typically produces between 100 and 400 megawatts, depending on lake levels. According to Buckley, average high demand in a day across the state is typically about 44,000 megawatts, so 400 megawatts would be a little less than 1% of that total.

“It’s not necessarily the tipping point,” Buckley said. “There’s a lot of different factors that are challenging overall grid reliability this summer. And Hyatt is one piece of the story.”

https://www.latimes.com