The Central Arizona Project (CAP) is a water management system that delivers Colorado River water to central and southern Arizona. It consists of a 336-mile aqueduct that transports water from the river to various cities and agricultural areas, helping to support the region's growing population and economy. Constructed in the 1970s, the CAP plays a crucial role in providing a reliable water supply for urban areas like Phoenix and Tucson. It also supports irrigation for agriculture, ensuring that crops can thrive in the arid climate of Arizona. The project is vital for sustainable water use in the region.