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
York Imperial and is also lop-sided. The 'Spencerville Red' is thought to be a cross between the 'York Imperial' and a crab apple. The 'York Imperial' is easily identified by its lop-sided shape. It is consistently one of the top-ten-selling apple varieties. The fruit is medium to large, and varies from an oblate-oblique shape to an oval-oblong shape, and the skins are deep red with greenish-yellow streaks and specks, as well as occasional patches of yellow or green. It can be streaked with grayish scarfskin. 'York Imperial' apples ripen in October and are harvested through December. This cultivar has a tart yet