Imperial Reservoir Imperial Reservoir The Imperial Reservoir is an artificial lake formed by the construction of the Imperial Diversion Dam across the Colorado River in the Lower Colorado River Valley of Imperial County, California, and Yuma County, Arizona. A component of the Imperial National Wildlife Refuge, the reservoir is northeast of Yuma, Arizona. Dry washes are the major watershed feed systems to Imperial Reservoir. The next upstream major watershed feeder is the Bill Williams River from western Arizona. Upstream on the Colorado River, the basic feeder watershed to Imperial Reservoir is the Havasu-Mojave Lakes Watershed, of Lake Havasu. Two dry wash watershed
Imperial Airways "Castor" for Imperial Airways' Empires Air Routes, in 1937. In November 2016, 80 years later, the Crete2Cape Vintage Air Rally flew this old route with fifteen vintage aeroplanes - a celebration of the skill and determination of these early aviators. Imperial Airways operated many types of aircraft from its formation on 1 April 1924 until 1 April 1940 when all aircraft still in service were transferred to BOAC. Imperial Airways Imperial Airways was the early British commercial long-range airline, operating from 1924 to 1939 and serving parts of Europe but principally the British Empire routes to South Africa, India and