The descendants of the first people, we know by more familiar names - Paiutes, Hopi, Mojave, Yuma, Havasupai, Hualapai. These names are the names which people gave to themselves - for example, Havasupai means “the people of  water blue-vert". The first non-autochtones in the area of the Colorado river were Spanish conquerors (conquistadors), who sought lhowever, d' money or other richnesses.
Ulloa was the first to see l' mouth of Colorado in 1539. Cardenas, which travelled with Coronado coming from Mexico in 1540, was the first to see the Large Canyon. Some of these Spanish soldiers remained or are turned over to live in the area, which explains why the Spanish language is so largely used aujourd' today in California, Arizona, New Mexico and Nevada.

The division of the languages n' was not the only effect of the contact between the Spanish soldiers and the people natives. The food, the diseases, the tools, the horses and a formidable mixture of cultures was the ultimate result of l' operation initial, sometimes hostile, contacts. Some two hundred years after the come conquerors, the Spanish priests, like the Fathers Dominguez and Escalante in 1776, entered and left explored basin the Colorado river as they sought ways of Voyage between their missions.
It was the Father Bitchy girls, also in 1776, who named the river, Rio Colorado, “river of color rouge." Jedediah Smith and other trappers come to seek it for the beavers in 1826, the researchers d' however on the way of California followed in 1849, and the Mormon colonists arrived at Las Vegas in 1855. Las Vegas, which is l' Spanish for " meadows, " does not become a jusqu' city; in 1905.

The explorers and the cartographers of the river came qu' in January 1858, under the direction of lieutenant Joseph Christmas Ives, who came from Colorado in steamer coming from the gulf of California. He as travelled far upstream as possible from Black Canyon, the possible site of Hoover Dam. John Wesley Powell and his men descended the river, starting from the principal affluent of Colorado, Green River.
Starting from Green River, Wyoming, him and its men rowed all along the Large Canyon. Powell made a second travels to the bottom of Colorado in 1871. The explorers river were lhope to find that Colorado, could be used like route of Voyage and the trade, but because of the strong fluctuations of the d' quantity; water of season in season, they concluded qu' it could not. The builders of the stopping came in 1931. A handle d' men made planning and the design of the stopping.
There were another 16000 workers who l' building even. Many of these men had families, wives and children, who came with them. Why so many people leave for what was, with l' time, a first place, underdeveloped and dangerous to live? Primarily, because of extremely difficult times, the depression, which then affected almost all the areas of the United States. People came from all the parts of the country to work in Hoover Dam. The lifestyle so much of people had to endure - camp-site in tents or huts along the Colorado river, some for as a long time as three years, without drinking water, toilets, or protection against the extreme climatic conditions - returns these " commun runs " People true heroes of Hoover Prejudice. 96 men were killed in industrial accidents during the construction of the stopping.
Several tens d' others died of heat or l' intoxication with carbon monoxide, while on the heap, and of the hundreds d' other people, wives and children of the workers, died of heat, l' water polluted or of disease. Because of Hoover Prejudice, the Colorado river was controlled for the first time in l' history. The farmers received a reliable supply water in Nevada, California and l' Arizona. And Los Angeles, San Diego and Phoenix and a d' dozen; other cities and villages received an inexpensive source d' electricity, allowing the growth of the population and industrial development.