Nimbus Fish Hatchery releases around 4 to 4.5 million young salmon and 430,000 yearling steelhead into California waterways annually. But due to rising costs and limited federal funding, the hatchery is planning to release half of both numbers, which is unprecedented. The U.S. Bureau of Reclamation funds the hatchery, which was originally created to mitigate the impacts of Nimbus Dam [on the American River in the Sacramento region] on steelhead and salmon runs. Fish raised in hatcheries like this one are key to keeping their populations alive in California. 

Other anadromous fish restoration news:

• KRCR (Redding, Calif.): Fall Chinook salmon return to Link River after more than a century​
• Science Friday: Podcast: The story behind the largest dam removal in U.S. history
• Science Friday: How colonization wreaked havoc on the Klamath River
• South Yuba River Citizens League: News release: SYRCL invites families to public salmon expeditions on the lower Yuba River