Which of the following is located in Sacramento County: Imperial Dam or Folsom South Canal?
Imperial Dam The Imperial Diversion Dam (National ID # CA10159) is a concrete slab and buttress, ogee weir structure across the California/Arizona border, 18 mi northeast of Yuma. Completed in 1938, the dam retains the waters of the Colorado River into the Imperial Reservoir before desilting and diversion into the All-American Canal, the Gila River, and the Yuma Project aqueduct. Between 1932 and 1940, the Imperial Irrigation District (IID) relied on the Inter-California Canal and the Imperial Canal and Alamo River.
Steamboat Slough Steamboat Slough, an alternate branch of the Sacramento River, named for its popular use by steamboats traveling between San Francisco and Sacramento. Its mouth is found at an elevation of 3 feet / 1 meter, 2 miles above Rio Vista, between Grand Island and Ryer Island. Its head is 11 miles above where it leaves the Sacramento River, between Sutter Island and Grand Island, at an elevation of 26 feet at .