Because of that, both dam spillways are expected to be operational.

Source: https://abc30.com/state-of-emergency-lake-success-tule-river-near-capacity/12954471/

Lake Oroville — one of the most important reservoirs in the state and home to the nation’s tallest dam — has so much water that officials on Friday opened the dam’s spillways for the first time since April 2019.

Source: https://federalnewsnetwork.com/u-s-news/2023/03/new-atmospheric-river-storm-brings-heavy-rain-to-california/

Once the power house is operational, this becomes the main path of the water, and the spillways are used occasionally.

Source: https://indianexpress.com/article/upsc-current-affairs/upsc-essentials/upsc-essentials-weekly-news-express-rains-air-quality-subansiri-icelands-earthquakes-and-more-key-takeaways-and-points-to-ponder-9025983/