Course of the Colorado River Topock Marsh in Topock Gorge and widens into Lake Havasu, formed by Parker Dam. Lake Havasu provides recreation as well as the home of the retired U.K. London Bridge in Lake Havasu City, Arizona, now the New London Bridge. Near Parker Dam are the first two major diversions of the lower Colorado: the Colorado River Aqueduct, which travels west to Los Angeles and San Diego, California; and the Central Arizona Project, which sends water east towards Phoenix and Tucson, Arizona. The intermittent Bill Williams River joins the Colorado from the east in Lake Havasu, just above Parker Dam. The river
London Bridge (Lake Havasu City) shore of Lake Havasu. The bridge was completed in 1971 (along with a canal), and links an island in the Colorado River with the main part of Lake Havasu City. The 1831 London Bridge was the last project of engineer John Rennie and was completed by his son, John Rennie the Younger. By 1962, the bridge was not sound enough to support the increased load of modern traffic, and it was sold by the City of London. The purchaser, Robert P. McCulloch, the chairman of McCulloch Oil Corporation, was the founder of Lake Havasu City, his retirement real estate development