Sierra Branch of the Strong Ranch slough

The Sierra Oaks Vista neighborhood has a natural drainage system. The watershed drains through to two tributaries crossing Northrop Ave into the Sierra Branch of the Strong Ranch Slough. At 600 Lilac Lane there is a grid and storm water runoff proceeds through the levee, under Munroe Street and Loehman's Plaza connecting to the Strong Ranch Slough again. Flood water is pumped into the American River when it is not at capacity. The County's DWR has done a study map of past flooding, flood plai