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<br />Bulletin 160-98 Public Review Draft <br /> <br />OOO~Q2 <br /> <br />Chapter 1. Introduction <br /> <br />portion of the San Andreas Fault. The Mojave is a region of interior drainage characterized by <br />large areas of alluvium with scattered area of recent volcanic features, The Mojave has <br />numerous playa lakes, including Silver Lake, the terminus of the Mojave River, The Colorado <br />Desert to the south, also a closed drainage basin, is a lower elevation desert whose most <br />prominent feature is the Salton Sea, which occupies a structural trough. The Basin and Range <br />province begins on the east side of California's Sierra Nevada and extends across Nevada and <br />into Utah. Also a region of interior drainage, it is characterized by fault block mountain ranges <br />separated by roughly north-south trending valleys, Owens Valley and Death Valley are <br />examples of such valleys. <br /> <br />I@"Photo: Owens Valley <br /> <br />California's Water Geography <br />Figure 1.3 shows the location of the State's major water projects, The Central Valley <br />Project is the largest water project in California, and the Department's State Water Project is the <br />second largest. (Descriptions of these, and of soine of the larger local water projects, are <br />provided in Chapter 3,) There are more than 1,200 dams in California large enough to be <br />jurisdictional under the State's dam safety program, representing about 40 maf of storage <br />capacity, Average annual runoff within the State is about 71 maf, Unlike some other western <br />states, the majority of California's surface water supply originates from within the State. The <br />Colorado River is the State's largest interstate river, The accompanying sidebar highlights some <br />statistics for California's largest waterbodies, <br /> <br />1-9 <br /> <br />DRAFT <br />