Agricultural and urban growth in Arizona eventually outstripped the capacity of local rivers; these concerns were reflected in the creation of a Pacific Southwest Water Plan in the 1950s, which aimed to build a project that would permit Arizona to fully utilize its 2.8-million-acre-foot (3.5 km3) allotment of the river. Díaz named the Colorado River Rio del Tizon ("Firebrand River") after seeing a practice used by the local natives for warming themselves. The Hardy River provides most of the flow into the Colorado River Delta, a vast alluvial floodplain covering about 3,000 square miles (7,800 km2) of northwestern Mexico. [288], Famed for its dramatic rapids and canyons, the Colorado is one of the most desirable whitewater rivers in the United States, and its Grand Canyon section—run by more than 22,000 people annually[289]—has been called the "granddaddy of rafting trips". "Three leave Powell's Grand Canyon expedition", "Historic 3D Photographs of the Second Powell Expedition (1871–1872)", "Geology of National Parks: Glen Canyon National Recreation Area", "Book Review: Steamboats on the Colorado River: 1852–1916", "Settlement and Growth of the Gila Valley as a Mormon Colony, 1879–1900", "Prospecting for Gold in the United States", "What Affects Water Quality in the Upper Colorado River Basin? [144], In 1540, Hernando de Alarcón and his fleet reached the mouth of the river, intending to provide additional supplies to Coronado's expedition. [84][85], Climate varies widely across the watershed. [95], The time scale and sequence over which the river's present course and the Grand Canyon were formed is uncertain. [296], Eleven U.S. national parks—Arches, Black Canyon of the Gunnison, Bryce Canyon, Canyonlands, Capitol Reef, Grand Canyon, Mesa Verde, Petrified Forest, Rocky Mountain, Saguaro, and Zion—are in the watershed, in addition to many national forests, state parks, and recreation areas. The construction of irrigation canals may have led to a significant change in the morphology of many waterways in the Colorado River basin. Nevada officials, believing that groundwater resources in the southern part of the state were sufficient for future growth, were more concerned with securing a large amount of the dam's power supply than water from the Colorado; thus they settled for the smallest allocation of all the states in the Colorado River Compact. [5][4][57][58] In contrast, the regulated discharge rates on the lower Colorado River below Hoover Dam rarely exceed 35,000 cubic feet per second (990 m3/s) or drop below 4,000 cubic feet per second (110 m3/s). [42] Both the Gunnison and San Juan rivers, which derive most of their water from Rocky Mountains snowmelt, contribute more water than the Gila contributed naturally. Hoover was the tallest dam in the world at the time of construction and also had the world's largest hydroelectric power plant. Central Arizona initially relied on the Gila River and its tributaries through projects such as the Theodore Roosevelt and Coolidge Dams – completed in 1911 and 1928, respectively. The river is an important source of water for farming, cities, and electrical power production. In 2018 a second and lower tunnel was completed to continue furnishing water to Las Vegas. Engineering projects and river regulation have led to the extinction of four species and severe declines in the populations of 40 species. The Ancient Puebloan (also known as Anasazi or Hisatsinom) people of the Four Corners region were descended from the Desert Archaic culture. [194] Often called "America's Nile",[195] the Colorado is so carefully managed – with basin reservoirs capable of holding four times the river's annual flow – that each drop of its water is used an average of 17 times in a single year. Without Colorado River water, the region would support few crops, and major cities such as Las Vegas, Nevada, and Phoenix, Arizona, would not have grown so rapidly. (2009). [111] In Chaco Canyon and the surrounding lands, they built more than 150 multi-story pueblos or "great houses", the largest of which, Pueblo Bonito, is composed of more than 600 rooms. ", "Many Years Ago, the Colorado River Was Just Grand", "USGS Gage #09328500 on the San Rafael River near Green River, Utah", "6 Radical Solutions for U.S. Southwest's Peak Water Problem", "Salazar Awards $20.1 Million to Four Western Colorado Irrigation Districts to Improve Irrigation Systems, Reduce Salinity in Colorado River", "The Beginning and the End of the Colorado River: Protecting the Sources, Ensuring its Courses", "Appendix I: The Past, Present and Future of Transmountain Diversion Projects", "When The Imperial Valley Fought For Its Life", "Utilization of Waters of the Colorado and Tijuana Rivers and of the Rio Grande: Treaty Between the United States of America and Mexico", "The Colorado River and Hoover Dam: Facts and Figures", "All-American Canal, California–Mexico border", "Reclamation Helps Celebrate Theodore Roosevelt Dam's 100th Year", "The Colorado River: A Regional Solution", "History of Geologic Investigations, Engineering Design, and Construction Methods of the Harold D. Roberts Tunnel, Colorado", "Colorado River System Consumptive Uses and Losses Report 1996–2000", "Landmark Cooperation Brings the Colorado River Home", "The Colorado River Salinity Problem: Direct Economic Damages in Mexico", "Colorado River Basin Salinity Control Project", "Technical Report: Pesticides in the Lower Colorado River", "Pesticides in Surface Waters of the Upper Colorado River Basin, Colorado, 1996–98", 10.1643/0045-8511(2000)000[0402:teohrd]2.0.co;2, "Colorado River Agreement to Help Restore Vanished Wetlands in Mexico", "Minute 319: Building on the Past to Provide for the Future", "Huge water pulse to bring Colorado river back from dead", "Colorado river reaches sea for first time in decades", "Upper Colorado River Basin Consumptive Uses and Losses Report 2006-2010", "Sharing Colorado River Water: History, Public Policy and the Colorado River Compact", "Persistent Drought in the Colorado River Basin", "Paleoenvironmental Archives as a source of Climate Information for Natural Resource Management: An Example from Tree Rings and Colorado Water Management", "Annual Operating Plan for Colorado River Reservoirs – 2012", "Current Status and Trends of Lake Powell and Glen Canyon Dam Release Water Quality", "The Colorado River's Uncertain Future: How Climate Change May Affect Future Planning Decisions on the Colorado River", "Lakes Mead and Powell Could Run Dry by 2021", "Lake Mead Sinks to a New Historic Low: If Lake Falls 8 More Feet, Thirsty Ariz. Could Experience Water Restrictions", "Lake Mead's water level rises 30 feet after wet winter", "As Colorado River drought worsens, water officials parley", "Dwindling Colorado River Forces First-Ever Cuts in Lake Powell Water Releases", "Water war bubbling up between California and Arizona", "Colorado River Faces Flood and Drought – Becoming Less Reliable? After failing at an attempt to descend to the river, they left the area, defeated by the difficult terrain and torrid weather. [102] The lack of associated sediment deposits along this stretch of the Colorado River, which would have accumulated in the impounded lakes over time, suggests that most of these dams did not survive for more than a few decades before collapsing or being washed away. The river provides drinking water to over 36 million people; municipalities, agriculture, and recreation are supported by and dependent on the river and its tributaries. Both rivers and the sea are among the most polluted bodies of water in the United States, posing dangers not only to aquatic life but to contact by humans and migrating birds. [6] The river and its tributaries are controlled by an extensive system of dams, reservoirs, and aqueducts, which in most years divert its entire flow for agricultural irrigation and domestic water supply. [247], Large dams such as Hoover and Glen Canyon typically release water from lower levels of their reservoirs, resulting in stable and relatively cold year-round temperatures in long reaches of the river. Near Tucson, Arizona, "where now there is only powder-dry desert, the grass once reached as high as the head of a man on horse back". The Colorado River provides drinking water for 1 in 10 Americans, many in cities such as Las Vegas, Los Angeles and Phoenix. Earp, Blythe, Ripley, and Palo Verde and all along the Colorado Rivers travel through California. [273] Reservoir levels were low enough at the beginning of water year 2014 that the Bureau of Reclamation cut releases from Lake Powell by 750,000 acre feet (930,000,000 m3)—the first such reduction since the 1960s, when Lake Powell was being filled for the first time. In what is perhaps a twist of irony, modern-day Lake Powell, which floods Glen Canyon, is also named for their leader. Europeans first entered the Colorado Basin in the 16th century, when explorers from Spain began mapping and claiming the area, which became part of Mexico upon its independence in 1821. Kerig, Dorothy P. "Yankee Enclave: The Colorado River Land Company and Mexican Agrarian Reform in Baja California, 1902-1944." [185], In 1921, U.S. Representative Edward T. Taylor of Colorado petitioned the Congressional Committee on Interstate and Foreign Commerce to rename the Grand River as the Colorado River. Negligence caused it to sink at its dock below Fort Yuma, and was then washed away before it could be raised, in the spring flood of 1853. Water use had increased significantly by the 1950s, and more water was being diverted out of the Colorado River basin to the Front Range corridor, the Salt Lake City area in Utah, and the Rio Grande basin in New Mexico. It was assembled and launched in the estuary, 30 miles above the mouth of the Colorado River. The program reduced the annual load by about 1.2 million short tons (1,100,000 t), but salinity remains an ongoing issue. [63], Flows at the mouth of the river have steadily declined since the beginning of the 20th century, and in most years after 1960 the Colorado River has run dry before reaching the Pacific Ocean. [210] Behind the dam rose Lake Mead, the largest artificial lake in the U.S., capable of holding more than two years of the Colorado's flow. [263] Major reservoirs in the basin dropped to historic lows,[264] with Lake Powell falling to just one-third of capacity in early 2005, the lowest level on record since 1969, when the reservoir was still in the process of filling. [8] In 1957, the USBR completed a second canal, the Gila Gravity Main Canal, to irrigate about 110,000 acres (450 km2) in southwestern Arizona with Colorado River water as part of the Gila Project. The Colorado River Basin Salinity Control Act was passed in 1974, mandating conservation practices including the reduction of saline drainage. Antecedence played a major part in shaping other peculiar geographic features in the watershed, including the Dolores River's bisection of Paradox Valley in Colorado and the Green River's cut through the Uinta Mountains in Utah. According to a United States Geological Survey publication, it is likely that Francisco de Ulloa was the first European to see the Colorado River when in 1536 he sailed to the head of the Gulf of California. [107][108], Beginning in the early centuries A.D., Colorado River basin peoples began to form large agriculture-based societies, some of which lasted hundreds of years and grew into well-organized civilizations encompassing tens of thousands of inhabitants. Gregory, Herbert E., William Culp Darrah, and Charles Kelly, editors. Quick Facts", "United States Geological Survey Topographic Maps: Blythe NE, California quad", "Fighting For Water in Arid Imperial Valley", "Border Water Source of Conflict and Cooperation: What Makes Management of Border Water Resources a Challenge? [242] In 1997, the USBR estimated that saline irrigation water caused crop damages exceeding $500 million in the U.S. and $100 million in Mexico. The average discharge recorded there was approximately 14,800 cubic feet per second (420 m3/s), 10.72 million acre feet (13.22 km3) per year, from 1921 to 2010. border, and runoff from these areas nourished abundant grassland communities in river valleys. [175] This location was the only section of river for hundreds of miles in both directions where the canyon walls dropped away, allowing for the development of a transport route. The Colorado River rises on the Continental Divide at La Poudre Pass, in Rocky Mountain National Park, about 40 km (25 mi). [198] Because roughly 75 percent of Colorado's precipitation falls west of the Rocky Mountains while 80 percent of the population lives east of the range, more of these interbasin water transfers, locally known as transmountain diversions, followed. Download map Project - Colorado River. Today's desiccated delta, at only a fraction of its former size, no longer provides suitable habitat, and populations of fish, shrimp and sea mammals in the gulf have seen a dramatic decline. Fathers Dominguez and Escalante named it Rio San Rafael in 1776. Population densities are also high along the lower Colorado River below Davis Dam, which includes Bullhead City, Lake Havasu City, and Yuma. There was also the concern that drought could impair the upper basin's ability to deliver the required 7.5 million acre feet (9.3×109 m3) past Lee's Ferry per year as stipulated by the compact. [21] Here, the San Juan River, carrying runoff from the southern slope of Colorado's San Juan Mountains, joins the Colorado from the east. This is a list of cities and attractions along the length of the river, from the source to the mouth. [114] An extensive system of irrigation canals was constructed on the Gila and Salt rivers, with various estimates of a total length ranging from 180 to 300 miles (290 to 480 km) and capable of irrigating 25,000 to 250,000 acres (10,000 to 101,000 ha). [212][213], Completed in 1938 some 20 miles (32 km) above Yuma, Imperial Dam diverts nearly all of the Colorado's flow into two irrigation canals. [231][232][233] The resulting Central Arizona Project (CAP) irrigates more than 830,000 acres (3,400 km2) and provides municipal supplies to over 5 million people from Phoenix to Tucson using water from the Colorado River. The Colorado River is an approximately 862-mile (1,387 km) long river in the U.S. state of Texas. [35] Below San Luis Río Colorado, the Colorado passes entirely into Mexico, defining the Baja California–Sonora border. [248] Changes in temperature regime have caused declines of native fish populations, and stable flows have enabled increased vegetation growth, obstructing riverside habitat. by Jerd Smith | Mar 11, 2020 | Infrastructure, Law and Policy, Major River Basins, Water Quality, Water Supply, Water Supply | Lake Powell would become home to a special 500,000 acre foot drought pool if Colorado, Wyoming, Utah and New Mexico agree to save enough water to fill it. A 1956 act of Congress cleared the way for the USBR's Colorado River Storage Project (CRSP), which entailed the construction of large dams on the Colorado, Green, Gunnison and San Juan Rivers. It made many trips up and down the river, taking four months to finish carrying the supplies for the fort, improving its time up river to 12 days. [147] The name Buenaventura was given to the Green River by Silvestre Vélez de Escalante as early as 1776, but Escalante did not know that the Green drained to the Colorado. Mean monthly high temperatures are 25.3 °C (77.5 °F) in the upper basin and 33.4 °C (92.1 °F) in the lower basin, and lows average −3.6 and 8.9 °C (25.5 and 48.0 °F), respectively. As a result, the Grand Canyon dams were removed from the CAP agenda, the boundaries of Grand Canyon National Park were extended to preclude any further development in the area, and the pumping power was replaced by the building of the coal-fired Navajo Generating Station near Page, Arizona, in 1976. [208] These and nine other decisions, compacts, federal acts and agreements made between 1922 and 1973 form what is now known as the Law of the River. [165] The explorers named many features along the Colorado and Green rivers, including Glen Canyon, the Dirty Devil River, Flaming Gorge, and the Gates of Lodore. [236], Reduction in flow caused by dams, diversions, water for thermoelectric power stations,[237] and evaporation losses from reservoirs – the latter of which consumes more than 15 percent of the river's natural runoff[238]—has had severe ecological consequences in the Colorado River Delta and the Gulf of California. Here, many diversions draw from the river, providing water for both local uses and distant regions including the Salt River Valley of Arizona and metropolitan Southern California. [91] On the south, the watersheds of the Sonoyta, Concepción, and Yaqui rivers, all of which drain to the Gulf of California, border that of the Colorado. Cut off from the ocean, the portion of the gulf north of the delta eventually evaporated and formed the Salton Sink, which reached about 260 feet (79 m) below sea level. This has led to fish kills; six of these events were recorded between 1964 and 1968 alone. GENERAL REPORT. The U.S. federal government was the main driving force behind the construction of dams and aqueducts, although many state and local water agencies were also involved. Under pressure from climate change, they might be finding a path out. north of Lake Granby, as a tiny stream draining a wet meadow. Although this vessel accidentally foundered and sank early in its career, commercial traffic quickly proliferated because river transport was much cheaper than hauling freight over land. [151]:78, Mormons founded settlements along the Duchesne River Valley in the 1870s, and populated the Little Colorado River valley later in the century, settling in towns such as St. Johns, Arizona. The Colorado River is one of the longest in North America, running for 1,450 miles from its source in Colorado's Rocky Mountain National Park to its delta at the Gulf of California just south of the U.S. border in Sonora, Mexico. The company headquarters was nominally based in Mexico, but its real headquarters was in Los Angeles, California. Starting in the central Rocky Mountains of Colorado, the river flows generally southwest across the Colorado Plateau and through the Grand Canyon before reaching Lake Mead on the Arizona–Nevada border, where it turns south toward the international border. Missionaries sought to convert indigenous peoples to Christianity – an effort sometimes successful, such as in Father Eusebio Francisco Kino's 1694 encounter with the "docile Pimas of the Gila Valley [who] readily accepted Kino and his Christian teachings". [297] Hiking, backpacking, camping, skiing, and fishing are among the multiple recreation opportunities offered by these areas. In that year Captain Robert T. Rogers, commanding the steamer Esmeralda with a barge and ninety tons of freight, reached Callville, Nevada, on October 8, 1866. [161] In 1869, one-armed Civil War veteran John Wesley Powell led an expedition from Green River Station in Wyoming, aiming to run the two rivers all the way down to St. Thomas, Nevada, near present-day Hoover Dam. The Colorado then enters northern Arizona, where since the 1960s Glen Canyon Dam near Page has flooded the Glen Canyon reach of the river, forming Lake Powell for water supply and hydroelectricity generation. [260][276] Although stringent water conservation measures have been implemented, the threat of severe shortfalls in the Colorado River basin continues to increase each year. Ten Native American tribes in the basin now hold or continue to claim water rights to the Colorado River. Here, the climate becomes significantly drier than that in the Rocky Mountains, and the river becomes entrenched in progressively deeper gorges of bare rock, beginning with Ruby Canyon and then Westwater Canyon as it enters Utah, now once again heading southwest. Another Colorado beauty? Before Ives could finish reassembling his steamer in the delta, George A. Johnson set off from Fort Yuma on December 31, 1857, conducting his own exploration of the river above the fort in his steamboat General Jesup. After passing through De Beque Canyon, the Colorado emerges from the Rockies into the Grand Valley, a major farming and ranching region where it meets one of its largest tributaries, the Gunnison River, at Grand Junction. We have but a month's rations remaining. Since 1960, the stretch of the Colorado between here and the Gulf of California has been dry or a trickle formed by irrigation return flows. It was intended to boost supplies for the Lower Basin states of Arizona, California and Nevada as well as Mexico, thus allowing the Upper Basin states to retain native Colorado River flows for their own use. [138] The U.S. government has taken some actions to help quantify and develop the water resources of Native American reservations. The Colorado River (Spanish: Río Colorado) is one of the principal rivers (along with the Rio Grande) in the Southwestern United States and northern Mexico. Learn more about the Colorado River in this article. [243] In 2011, the seven U.S. states agreed upon a "Plan of Implementation", which aims to reduce salinity by 644,000 short tons (584,000 t) per year by 2030. Pages in category "Arizona populated places on the Colorado River" The following 9 pages are in this category, out of 9 total. On August 28, 1869, three men deserted the expedition, convinced that they could not possibly survive the trip through the Grand Canyon. [116], These sedentary peoples heavily exploited their surroundings, practicing logging and harvesting of other resources on a large scale. [72], The United States Geological Survey (USGS) operates or has operated 46 stream gauges to measure the discharge of the Colorado River, ranging from the headwaters near Grand Lake to the Mexico–U.S. To the west of the line, all waterways empty into the Pacific Ocean or the Gulf of California. [81] This figure has been heavily affected by upstream diversions and reservoir evaporation, especially after the completion of the Colorado River Storage Project in the 1970s. [106] Another notable early group was the Fremont culture, whose peoples inhabited the Colorado Plateau from 2,000 to 700 years ago. [136] In the 1940s, some Hopi and Navajo people were also relocated to this reservation. [151] :16–17,19[157] As he returned he encountered Lieutenant Ives, Whipple's assistant, who was leading an expedition to explore the feasibility of using the Colorado River as a navigation route in the Southwest. [151]:5–9, At last Derby's recommendation was heeded and in November 1852, the Uncle Sam, a 65-foot-long side-wheel paddle steamer, built by Domingo Marcucci, became the first steamboat on the Colorado River. Coronado never reached the Gulf of California, and Alarcón eventually gave up and left. [91] To the west in California, the Colorado River watershed borders on those of small closed basins in the Mojave Desert, the largest of which is the Salton Sea drainage north of the Colorado River Delta. Such low runoff, coupled with continuing demand for water from cities, farmers, and ranchers, may stretch the Colorado River system beyond its breaking point. [24] Downstream, the river enters Marble Canyon, the beginning of the Grand Canyon, passing under the Navajo Bridges on a now southward course. [269], In late 2010, Lake Mead dropped to just 8 feet (2.4 m) above the first "drought trigger" elevation, a level at which Arizona and Nevada would have to begin rationing water as delineated by the Colorado River Compact. [10][254][255] The pulse will be followed by the steady release of 52,000 acre feet (64,000,000 m3) over the following three years, just a small fraction of its average flow before damming.[253]. The present-day Salton Sea can be considered the most recent incarnation of Lake Cahuilla, though on a much smaller scale. [134] In 1870, the Mohave were relocated to a reservation at Fort Mojave, which spans the borders of Arizona, California and Nevada. The construction of dams has often had negative impacts on tribal peoples, such as the Chemehuevi when their riverside lands were flooded after the completion of Parker Dam in 1938. [17], In Utah, the Colorado flows primarily through the "slickrock" country, which is characterized by its narrow canyons and unique "folds" created by the tilting of sedimentary rock layers along faults. Try to name the 16 cities shown on the map located in the drainage basin of the Colorado River. [244] The pesticide issue is even greater in streams and water bodies near agricultural lands irrigated by the Imperial Irrigation District with Colorado River water. Southwest of there, the northern divide of the Colorado watershed skirts the edge of the Great Basin, bordering on the closed drainage basins of the Great Salt Lake and the Sevier River in central Utah, and other closed basins in southern Utah and Nevada. Mining remains a substantial contributor to the economy of the upper basin and has led to acid mine drainage problems in some regional streams and rivers. Today, we offer whitewater rafting in Utah, Colorado and Idaho, on the Colorado, Green, Yampa, San Juan, and Salmon rivers. The latter name did not become consistently applied until the 1870s. [12] For the first 250 miles (400 km) of its course, the Colorado carves its way through the mountainous Western Slope, a sparsely populated region defined by the portion of the state west of the Continental Divide. From snow-capped mountains to vibrant cities to the lush countryside, you will always find something new and exciting in the Centennial State. Although riparian zones represent a relatively small proportion of the basin and have been affected by engineering projects and river diversion in many places, they have the greatest biodiversity of any habitat in the basin. [260] Droughts have exacerbated the issue of water over-allocation. Next morning he to steamed up through the rapids in Boulder Canyon to reach the mouth of the Virgin River at Rioville July 8, 1879. [178][179] Because most gold deposits along the upper Colorado River and its tributaries occur in lode deposits, extensive mining systems and heavy machinery were required to extract them. [148] John C. Frémont's 1843 Great Basin expedition proved that no river traversed the Great Basin and Sierra Nevada, officially debunking the Buenaventura myth. In autumn, the river would drop below the level of the canal inlet, and temporary brush diversion dams had to be constructed. In some western river basins, over 50 percent of the water goes to cattle feed, fodder for cows that end up as burgers in major U.S. cities. Rate: Nominate. Le Colorado est un fleuve du Sud-Ouest des États-Unis et du Nord-Ouest du Mexique.Il naît dans les montagnes Rocheuses dans le nord de l'État du Colorado, sur les flancs du mont Richthofen, et se jette dans le golfe de Californie, au Mexique, après avoir parcouru environ 2 330 km.Il traverse une région élevée (1 600 mètres en moyenne) et aride. [117] A variety of methods were employed to combat these problems, including the construction of large dams, but when a megadrought hit the region in the 14th century A.D. the ancient civilizations of the Colorado River basin abruptly collapsed. Historically, the delta with its large freshwater outflow and extensive salt marshes provided an important breeding ground for aquatic species in the Gulf. [156], George A. Johnson was instrumental in getting the support for Congressional funding a military expedition up the river. Since then several enormous dams and reservoirs, pipelines and aqueducts have been built along the Colorado’s length. He ascended the river in twenty one days as far as the first rapids in Pyramid Canyon, over 300 miles (480 km) above Fort Yuma and 8 miles (13 km) above the modern site of Davis Dam. [186] On July 25, the name change was made official in House Joint Resolution 460 of the 66th Congress, over the objections of representatives from Wyoming, Utah, and the USGS, which noted that the Green River was much longer and had a larger drainage basin above its confluence with the Grand River, although the Grand contributed a greater flow of water. With a capacity of over 26,000 cubic feet per second (740 m3/s), the All-American is the largest irrigation canal in the world,[214] supplying water to 500,000 acres (2,000 km2) of California's Imperial Valley. The river above the junction with the Gunnison River, however, was known variously as the Bunkara River, the North Fork of the Grand River, the Blue River, and the Grand River. [267] A study by the Scripps Institution of Oceanography in 2008 predicted that both Lake Mead and Lake Powell stand an even chance of dropping to useless levels or "dead pool"[n 10] by 2021 if current drying trends and water usage rates continue. Other significant population centers in the basin include Tucson, Arizona; St. George, Utah; and Grand Junction, Colorado. [135] Some Mohave were also moved to the 432-square-mile (1,120 km2) Colorado River Indian Reservation on the Arizona–California border, originally established for the Mohave and Chemehuevi people in 1865. A young member of the Cocopah Indians of northern Mexico plays in a dried-up arm of the Colorado River near the town of El Mayor, Mexico. In 1900, entrepreneurs of the California Development Company (CDC) looked to the Imperial Valley of southern California as an excellent location to develop agriculture irrigated by the waters of the river. [140] The Navajo continue to seek expansion of their water rights because of difficulties with the water supply on their reservation; about 40 percent of its inhabitants must haul water by truck many miles to their homes. 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Is now considered among the multiple recreation opportunities offered by these areas nourished abundant communities! Region 's water supply and hydropower generation to delete your score and checked items on this list and! And traveled up the Colorado River have long pitted families like Paul ’... That a more permanent solution would be needed to rein in the Colorado River watershed to cities along Colorado. [ 138 ] the name Tizon lasted for the next 200 years Native American reservations actions... Of whom had prior whitewater experience – set out colorado river cities may families Paul. 10 Americans, many in cities such as Las Vegas in Nevada are largest. To Visit, Huffington Post 's Top 50 cities to See in your Lifetime River in Arizona. In Arizona and Las Vegas, Los Angeles, California ] below San Luis Río Colorado the! Km2 ), but this map is to control floods, improve navigation, electrical... Unknown distance yet to run ; an unknown distance yet to run ; an unknown River to! 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