South Sacramento Streams
Urban neighborhoods in the southern portion of the City and County of Sacramento rely on levees to protect them from foothill runoff and overflows from the Cosumnes and Mokelumne Rivers as well as from levee failures in the Delta just south of Sacramento (due to the topography, flood waters would flow north into the southern portions of the Sacramento area). Four local creeks in the area protect most of the neighborhoods, which include Morrison Creek, Elder Creek, Florin Creek and Unionhouse Creek.
Incremental improvements to the local creeks have been constructed between 1996 and 2017 by the U.S. Army Corps of Engineers, State of California and SAFCA. These improvements include the construction of 12.6 miles of floodwall, 7.7 miles of sheet-pile cutoff wall, 1.3 miles of new levees, raising 4.6 miles of existing levees and retrofitting 17 bridges.