The Cottonwood Creek Anderson-Cottonwood Irrigation District (ACID) siphon had become exposed once again in Cottonwood Creek and posed a passage problem for adult salmonids. Construction of the Cottonwood Creek ACID Siphon Project to alleviate this barrier was completed in November 2010. This project improved access to 30 miles of spawning habitat for fall-run and spring-run Chinook salmon and Central Valley steelhead. © Tricia Bratcher, California Department of Fish and Wildlife