Final answer:
The Colorado River, Humboldt River, and Truckee River are located in Nevada. The Colorado River is noted for its vital importance in water supply and irrigation, regulated by systems including the Hoover Dam.
Step-by-step explanation:
The Colorado River, Humboldt River, and Truckee River are all located in the state of Nevada. The Colorado River is particularly notable for the significant role it plays in supplying water to over 24 million people and irrigating 2 million acres of land through a complex system of dams and canals, of which the Hoover Dam is one of the most recognizable.
This river system supports major cities such as Los Angeles and Las Vegas and is heavily regulated to distribute water resources among several states including Arizona, Colorado, California, Nevada, New Mexico, Utah, and Wyoming.