Explain why California built long aqueducts to move water, using the Los Angeles Aqueduct as the primary example, including its costs and controversy.
California has an uneven water problem: much of its rain and snow falls in the north and in the mountains, but many of its people, farms, and cities are farther south, in places that naturally get far less water. Engineers solved this the same way they solved the desert-farming problem in week 3: by moving water long distances through canals and pipelines called aqueducts. The most famous example is the Los Angeles Aqueduct, completed in 1913 under engineer William Mulholland, which carries water about 230 miles from the Owens Valley to the growing city of Los Angeles.
This solution came with real costs. Farmers and ranchers in the Owens Valley lost the water their own land depended on, leading to years of bitter conflict sometimes called the California Water Wars, including sabotage of the aqueduct itself in the 1920s. Later projects, including Hetch Hetchy for San Francisco and the California Aqueduct as part of the State Water Project, moved even more water from north to south across the state. Water in California has always been powerful, contested, and carefully engineered, not simply free for the taking.
Mastery looks like: They can explain why California needed aqueducts, name the Los Angeles Aqueduct and Mulholland, and describe the real cost to the Owens Valley.
Common stumbles: Thinking water simply appears wherever it is needed; missing that the aqueduct caused real conflict and loss for the region it drew from.