About Parker,AZ:
Founded in 1908, the town was named after Ely Parker, the first Native American commissioner for the U.S. government. The original town site of Parker was surveyed and laid out in 1909 by Earl H. Parker, a railroad location engineer for the Arizona & California Railway. The town officially incorporated in 1948 and became the county seat for the newly created La Paz County on January 1, 1983.The town's name and origin began when a post office called Parker was established January 6, 1871, at Parker's Landing and the site of the Parker Indian Agency, named for Ely Parker, on the Colorado River Indian Reservation, four miles downriver from the site of the railroad bridge of the modern town, to serve the Indian agency. What became Parkers Landing was established on the river as the place to land and pick up cargo and personnel for the Indian Agency and the U. S. Army detachment that was stationed there at Camp Colorado from 1864 to 1869, during the first years of the Reservation. Camp Colorado was abandoned after wind-blown sparks from the departing steamboat Cocopah rapidly burned down the brush huts of the officers of the garrison, and endangered its barracks and storehouses.
Parker is the county seat of La Paz County. La Paz County was established in 1983 after voters approved separating the northern portion of Yuma County, making it the only county to be established after Arizona became a state in 1912, and currently the second youngest county in the United States (behind the consolidated city-county of Broomfield, Colorado, which was established in 2001).
The Colorado River Indian Reservation is located in the western portion of the county surrounding the Town of Parker on all four sides. The Colorado River Indian Tribes is a federally recognized tribe consisting of the four distinct ethnic groups associated with the Colorado River Indian Reservation: Chemehuevi, the Mohave, Hopi, and Navajo. The reservation was established on March 3, 1865, for "Indians of said river and its tributaries. Initially, these were the Mojave and Chemehuevi, but Hopi and Navajo people were relocated to the reservation in 1945. John Scott designed the tribal seal in 1966, with four feathers to represent the four CRIT tribes. Margie McCabe designed the tribal flag, which the tribe formally adopted in 1979. The Colorado River Indian Tribes (CRIT) has senior water rights to divert up to 719,248 acre feet of water from the Colorado River, which represents nearly one-third of the allocation for the state of Arizona.
Parker Dam is a concrete arch-gravity dam that crosses the Colorado River 155 miles (249 km) downstream of Hoover Dam. Built between 1934 and 1938 by the Bureau of Reclamation, it is 320 feet (98 m) high, 235 feet (72 m) of which are below the riverbed (the deep excavation was necessary in order to reach the bedrock on which the foundation of the dam was built), making it the deepest dam in the world. The portion of the dam above the foundation stands 85 feet (25.9 m) tall, making it the only dam in the world that stands more underground than above ground. The dam's primary functions are to create a reservoir, and to generate hydroelectric power. The reservoir behind the dam is called Lake Havasu and can store 647,000 acre⋅ft (798,000,000 m3; 2.11×1011 US gal; 1.76×1011 imp gal). The dam straddles the Arizona-California state border at the narrows the river passes through between the Whipple Mountains in San Bernardino County, California and the Buckskin Mountains in La Paz County, Arizona. Construction of the dam was a contentious issue for Arizona. Built as part of the larger Colorado River Compact of 1922, several political groups, their members and privately owned utility companies in Arizona were not pleased with the plan in general and refused to sign it until 1944. Even then Arizona continued to dispute its water allotments until a 1963 Supreme Court decision settled the issue. The court has had to adjust the agreement several times since, most recently in 2000. As recently as 2008 Arizona Senator John McCain called for a renegotiation of the plan.
In 1935, when Arizona Governor Benjamin Baker Moeur sent 6 members of the Arizona National Guard to observe the dam's construction, they reported back that there was construction activity on the Arizona side of the river. Arizona Attorney General Arthur La Prade concluded that the Metropolitan Water District had no right to build on Arizona's territory, which prompted Governor Moeur to send a larger National Guard force to halt construction. The troops were recalled when Secretary of the Interior Harold L. Ickes halted construction until the issue had been settled.
The Department of the Interior took Arizona to court over the issue hoping to end the state's interference. To the Department of the Interior's surprise, the Supreme Court sided with Arizona and dismissed the injunction. The court concluded that the dam had never been directly approved by Congress and that California was not entitled to build on Arizona's land without Arizona's consent. Arizona eventually agreed to allow the dam in exchange for approval of the Gila River irrigation project.