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 Prague. It is also difficult to define for how long the Imperial and Ceremonial Swords have belonged to the regalia. Until the 15th century the Imperial Regalia had no firm depository and sometimes accompanied the ruler on his trips through the empire. Above all with conflicts around the legality of the rule it was important to own the insignia. As depositories during this time some imperial castles or seats of reliable ministerialises are known: Emperor Sigismund transferred the Imperial Regalia "to everlasting preservation" to the Free Imperial City of Nuremberg with a dated document on 29 September 1423. They arrived