Which dam is the major structure located on the Sacramento River?

The major structure located on the Sacramento River is Shasta Dam. This dam plays a crucial role in water management, providing flood control, water storage, and hydroelectric power generation. Shasta Dam is the largest reservoir in California's State Water Project and significantly influences the flow and regulation of the Sacramento River, helping to ensure a stable water supply for agricultural, municipal, and environmental uses in the region.

Oroville Dam, while also an important structure in California’s water management system, is situated on the Feather River, not directly on the Sacramento River. Folsom Dam is located on the American River, a tributary of the Sacramento River, but it is not the major structure on the Sacramento itself. Lake Oroville, meanwhile, is the reservoir created by Oroville Dam and, like it, is not on the Sacramento River.

Understanding the positioning and functions of these dams is critical for effective water management and addressing California's water needs.