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 Regalia Kleinodien ("Aachen jewels"). It is not known how long they have been considered among the Imperial Regalia, nor how long they had been in Aachen. The inventory of the regalia during the late Middle Ages normally consisted only of five to six items. Goffredo da Viterbo counted following items: the Imperial Cross, the Holy Lance, the crown, the sceptre, the orb, and the sword. On other lists, however, the sword is not mentioned. Whether the medieval chronicles really do refer to the same regalia which are kept in Vienna today depends on a variety of factors. Descriptions of the emperors