Lake Havasu is a reservoir created by Parker Dam on the Colorado River, located between Arizona and California. The lake was formed in 1938, and its hydrology is mainly controlled by water releases from the upstream dams. The lake receives its surface flow from the Colorado River, and its snowpack providers include the Rocky Mountains, the Sierra Nevada, and the San Gabriel Mountains. The lake plays a vital role in supplying water to agricultural and recreational activities in the surrounding areas. Agricultural applications include irrigation for crops, while recreational uses include fishing, boating, and camping. The lake is also famous for the London Bridge, which was transported from England and reassembled in Lake Havasu City in 1971.