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
Ministry of the Imperial Household Household Office became the Imperial Household Agency (the current name), and placed under the fold of the newly created , as an external agency attached to it. In 2001, the Imperial Household Agency was organizationally re-positioned under the . The court developed a supporting bureaucracy which was exclusively focused on serving the needs of the Imperial Household . Among the "ritsuryō" officials within this ministry structure were: The deliberate redundancies at the top are features of each position in this remarkably stable hierarchic schema. Many positions would mirror the "-kyō," "-taifu," "-shō," "-jō," and "-sakan" pattern. Ministry of the Imperial