Female Chinook salmon building a redd in the enhanced spawning habitat in Deer Creek, a tributary to the lower Yuba River. Gravel is augmented into Deer Creek in areas downstream of dams where sediment transport and deposition have been altered. In order for salmon and steelhead to successfully spawn, they require the right size gravel and cobbles. Sierra Streams Institute, as well as other partners, have worked on augmenting the gravel supply in Deer Creek through gravel augmentation and spawning bed enhancement projects in 2011, 2012, and 2013. Learn More © Justin Wood, Sierra Streams Institute