This article is about the Colorado River which flows through the Grand Canyon. The Grand Canyon For other rivers named Colorado, see Colorado River (disambiguation). Colorado River (Spanish Río Colorado) may refer to Colorado River, which flows through the Grand Canyon and drains into the Gulf of California

Colorado River
Map of the Colorado Watershed
Mouth	Gulf of California
Basin countries	United States, Mexico
Length	2,330 km (1,450 mi)
Source elevation	~2700 m (~9000 ft)
Avg. " Sea of Cortez " redirects here For the book by John Steinbeck, see The Log from the Sea of Cortez. A drainage basin is an extent of Land where Water from Rain or Snow melt drains downhill into a body of water such as a River, The United States of America —commonly referred to as the The United Mexican States ( or commonly Mexico (ˈmɛksɪkoʊ () is a federal constitutional Republic in North America. discharge	620 m³/s (22,000 ft³/s)[1]
Basin area	629,100 km² (242,900 mi²)

The Colorado River from the bottom of Marble Canyon, in the Upper Grand Canyon

Colorado River in the Grand Canyon from Desert View

The Colorado River from Laughlin

Horseshoe Bend is a horseshoe-shaped meander of the Colorado River located near the town of Page, Arizona

A remote stretch of the Colorado River from the Escalante Route in the Grand Canyon

The Colorado River ('Aha Kwahwat in Mojave)^[2] is a river in the southwestern United States and northwestern Mexico, approximately 1,450 mi (2,330 km) long, draining a part of the arid regions on the western slope of the Rocky Mountains. In Hydrology, the discharge or outflow of a River is the volume of Water transported by it in a certain amount of time Laughlin is a Census-designated place (CDP in Clark County, Nevada, United States. Horseshoe Bend is the name for a horseshoe-shaped Meander of the Colorado River located near the town of Page Arizona, in the United States The Escalante Route is a Hiking Trail on the South Rim of the Grand Canyon National Park, located in the U The Grand Canyon Mojave is the native language of the Mojave people along the Colorado River in eastern California northwestern Arizona and southwestern Nevada "Riverine" redirects here For the use of that term in Maritime geography, see there The United States of America —commonly referred to as the The United Mexican States ( or commonly Mexico (ˈmɛksɪkoʊ () is a federal constitutional Republic in North America. Mountain peaks of the Rocky Mountains The Rocky Mountains, often called the Rockies, are a Mountain range in western North America. The natural course of the river flows into the Gulf of California, but the heavy use of the river as an irrigation source for the Imperial Valley has desiccated the lower course of the river in Mexico such that it no longer consistently reaches the sea. " Sea of Cortez " redirects here For the book by John Steinbeck, see The Log from the Sea of Cortez. The Imperial Valley is a region of southeastern California ( USA) located in part between the Colorado River and the Salton Sea, which Desiccation is the state of extreme dryness or the process of extreme drying

The Colorado River drains 242,900 sq mi (629,100 km²). Total flows of the river range from 4000 cubic feet per second (113 m³/s) in droughts to 1,000,000 ft³/s (28,000 m³/s) in severe floods. With the construction of massive power dams on the lower course of the river, floods of over 70,000 ft³/s (2000 m³/s) are rare. The mean flow of the total river before diversion is 22,000 ft³/s (620 m³/s). Historically the flow was much higher before water usage began in the basin.

History

Grand River

Until 1921, the section of the Colorado River from its headwaters in Rocky Mountain National Park to its confluence with the Green River in Utah was known as the "Grand River,"^[3] the origin of several now orphaned names including Grand Lake, Grand Valley, Grand Junction, Grand County, Colorado, and Grand County, Utah. The Green River, located in the western United States, is the chief tributary of the Colorado River. The State of Utah (ˈjuːtɔː or) is a western state of the United States. Grand Lake is a natural Lake, one of the Headwaters of the Colorado River in Grand County Colorado. The Grand Valley is an extended populated valley approximately 30 miles (48 km long and 5 miles (8 km wide located along the Colorado River in Mesa County in The City of Grand Junction is a Home Rule Municipality that is the County seat and the most populous city of Mesa County, Colorado, Grand County is the 21st most extensive of the 64 counties of the State of Colorado of the United States. Grand County is a County located in the US state of Utah. As of 2000 the population was 8485 and by 2005 had been estimated at 8743 Colorado U. The State of Colorado ( or chiefly by nonresidents) is a state located in the Rocky Mountain region of the United States of America. S. Representative Edward T. Taylor petitioned the Congressional Committee on Interstate and Foreign Commerce to rename the Grand River as the Colorado River. Edward Thomas Taylor ( June 19, 1858 &ndash September 3, 1941) was a U The US House Commerce Committee on Energy and Commerce is one of the oldest standing committees of the U On July 25, 1921 the name change was made official in House Joint Resolution 460 of the 66th Congress, over the objections of representatives from Wyoming and Utah and the United States Geological Survey which noted that the drainage basin of the Green River was more than 70% more extensive than that of the Grand River^[4], although the Grand carried a slightly higher volume of water at its confluence with the Green. Dates of sessions March 4 1919 - March 4 1921 First session May 19 1919 - November 19 The State of Wyoming ( is a sparsely populated state in the western region of the United States. The State of Utah (ˈjuːtɔː or) is a western state of the United States. The United States Geological Survey ( USGS) is a scientific agency of the United States government.

Course

Prehistory

It is the opinion of some geologists that before the Gulf of California came into being some 7-8 million years ago, the Colorado River initially had its outlet somewhere along what is now the California coast. They believe that the massive Monterey Submarine Canyon under Monterey Bay along with the associated undersea sedimentary fan may be remnants of the Colorado's ancient outlet. Monterey Canyon, or Monterey Submarine Canyon, is a Submarine canyon in Monterey Bay, California. This article is about the bay near Monterey CA For other uses see Monterey Bay Aquarium, California State University Monterey Bay ^[5] The canyon has moved north to its current location by the action of the San Andreas Fault and would have been approximately where Santa Barbara is located when both the San Andreas Fault and the Gulf of California came into being. The San Andreas Fault is a geologic Transform fault that runs a length of roughly 800 miles (1300 km through California in the United States. Santa Barbara is a city in Santa Barbara County California, United States.

Today

The Colorado River's source is La Poudre Pass Lake, located high in Rocky Mountain National Park, just west of the Continental Divide. La Poudre Pass Lake (el 3101 m/10175 ft is a high lakelet located in the Rocky Mountains of northern Colorado in the United States. A continental divide is a line of elevated Terrain which forms a border between two watersheds such that Water falling on one side of the line eventually Below Rocky Mountain National Park, the river flows through the Kawuneeche Valley and then flows through Grand Lake, the largest natural body of water in Colorado, before being dammed to create Shadow Mountain Reservoir. The river then flows into Lake Granby, another reservoir, and finally begins its journey to the Gulf of California where U. " Sea of Cortez " redirects here For the book by John Steinbeck, see The Log from the Sea of Cortez. S. Highway 40 roughly parallels the river to the town of Kremmling, where it enters Gore Canyon. Kremmling is a Statutory Town in Grand County, Colorado, United States. Most of the river's tributaries within Colorado are small. However there are exceptions, such as the Gunnison and Roaring Fork Rivers, in which massive amounts of water flow. About a hundred miles later it meets the Eagle River in the town of Dotsero, Colorado and where I-70 parallels the river through Glenwood Canyon. Dotsero is a wide by deep Maar Volcano located in Dotsero Colorado near the Colorado River and the Eagle River. Interstate 70 (I-70 is an Interstate highway in the United States that runs from Interstate 15 near Cove Fort Utah, to a Park and Ride Glenwood Canyon is a rugged scenic 125 mile (21 km gorge on the Colorado River in western Colorado in the United States. The river then passes through the city of Glenwood Springs where it is joined by the swift flowing Roaring Fork River. The City of Glenwood Springs is a Home Rule Municipality that is the County seat and the most populous city of Garfield County, Colorado West of Glenwood Springs, the Colorado runs through the Grand Valley and is joined by the Gunnison River in Grand Junction. The Grand Valley is an extended populated valley approximately 30 miles (48 km long and 5 miles (8 km wide located along the Colorado River in Mesa County in The Gunnison River is a tributary of the Colorado River, approximately 180 mi (290 km long in the U The City of Grand Junction is a Home Rule Municipality that is the County seat and the most populous city of Mesa County, Colorado, From there it flows westward to the Utah border and Westwater Canyon. The State of Utah (ˈjuːtɔː or) is a western state of the United States. Westwater Canyon is a canyon located on the Colorado River in Eastern Utah between Grand Junction, Colorado and Moab Utah. The Colorado here ranges from 200 to 1200 feet wide (60 to 370 m) and from 6 to 30 feet in depth (2 to 9 m) with occasional deeper areas.

The river turns southwest near Fruita, Colorado and is joined by the Dolores River soon after entering Utah. "Fruita" redirects here For the city in Utah see Fruita Utah. The Dolores River is a tributary of the Colorado River, approximately 250 mi (402 km long in the U It partially forms the southern border of Arches National Park near Moab, Utah and then passes by Dead Horse Point State Park and through Canyonlands National Park where it is met by one of its primary tributaries, the Green River. Arches National Park is a US National park in southern Utah. It is known for preserving over 2000 natural sandstone arches, including the For other instances of Moab, see Moab (disambiguation. Moab is a city in Grand County, in eastern Utah, in Dead Horse Point State Park is a Utah state park adjacent to Canyonlands National Park, featuring a dramatic overlook of the Colorado River. Canyonlands National Park is located in the American state of Utah, near city of Moab and preserves a colorful landscape eroded into countless canyons The Green River, located in the western United States, is the chief tributary of the Colorado River. The Colorado then flows into Lake Powell, formed by the Glen Canyon Dam. Lake Powell is a man-made reservoir on the Colorado River, straddling the border between Utah and Arizona. Glen Canyon Dam is a Dam on the Colorado River at Page Arizona, USA operated by the United States Bureau of Reclamation. Below the dam, water released from the bottom of Lake Powell makes the river clear, clean, and cold. Just south of the town of Page, Arizona, the river forms the dramatic Horseshoe Bend, then at Lees Ferry is joined by another tributary, the warm, shallow, muddy Paria River, and begins its course through Marble Canyon. Page is a town in Coconino County, Arizona, United States, near the Glen Canyon Dam and Lake Powell. The State of Arizona ( is a state located in the southwestern region of the United States. Horseshoe Bend is the name for a horseshoe-shaped Meander of the Colorado River located near the town of Page Arizona, in the United States Lee's Ferry (also Lees Ferry or Lee Ferry) is a site on the Colorado River in Coconino County, Arizona, United States The Paria River ( is a tributary of the Colorado River, approximately 75 mi (121 km long in southern Utah and northern Arizona in the United States This page is for the Marble Canyon of the Colorado River in Arizona Here, the Colorado ranges from 300 to 2000 feet in width (90 to 610 m) and 9 to 130 feet in depth (3 to 40 m).

At the southern end of Marble Canyon, the river is joined by another tributary, the Little Colorado, and the river then turns abruptly west directly across the folds and fault line of the plateau, through the Grand Canyon, which is 277 miles long (349 km) and from 4 to 20 miles wide (6 to 30 km) between the upper cliffs. The Little Colorado River is a tributary of the Colorado River, approximately 315 mi (507 km long in the U The Grand Canyon The walls, 4000 to 6000 feet high (1200 to 1800 m), drop in successive escarpments of 500 to 1600 feet (150 to 490 m), banded in splendid colours toward the narrow gorge of the present river.

Below the confluence of the Virgin River of Nevada the Colorado abruptly turns southward. The Virgin River is a nearly 160 mile (322 km long tributary of the Colorado River in the southwestern United States. Nevada ( is a state located in the western region of the United States of America. Hoover Dam, built during the Great Depression, forms Lake Mead, a popular recreation site as well as the supplier of most of the water for the city of Las Vegas. Hoover Dam, also sometimes known as Boulder Dam, is a Concrete Arch-gravity dam in the Black Canyon of the Colorado River, on the Lake Mead is the largest man-made Lake and Reservoir in the United States. Las Vegas ( Spanish: "The Meadows" is the most populous City in the state of Nevada, the seat of Clark County, and an internationally From Hoover Dam, the river flows south and forms part of the boundary between Arizona and Nevada and between Arizona and California. The State of Arizona ( is a state located in the southwestern region of the United States. Nevada ( is a state located in the western region of the United States of America. California ( is a US state on the West Coast of the United States, along the Pacific Ocean. Along the California-Arizona reach of the river, four additional dams are operated to divert water for agricultural irrigation and for recreation. Lake Mohave, formed by Davis Dam, lies in the southern portion of the Lake Mead National Recreation Area. Lake Mohave is a Lake formed by Davis Dam on the Colorado River, which defines the border between Nevada and Arizona in the United The Davis Dam is a Dam on the Colorado River downstream from Hoover Dam (ca Lake Mead is the largest man-made Lake and Reservoir in the United States. Lake Havasu, formed by Parker Dam, provides recreation as well as the home of the retired New London Bridge. Lake Havasu is a large reservoir behind Parker Dam on the Colorado River, on the border between California and Arizona. Parker Dam is a Concrete Arch-gravity dam which spans the Colorado river, at a point 155 miles (250 km downstream of Hoover Dam London Bridge is a Bridge between the City of London and Southwark in London, England, over the River Thames. The two remaining dams supply irrigation water: Palo Verde Diversion Dam and Imperial Dam. The Imperial Dam is a dam near Yuma Arizona (USA built in the 1930s Here, the Colorado River ranges in width from 700 to 2500 feet (210 to 760 m) and from 8 to 100 feet in depth (2 to 30 m).

Below the Black Canyon the river lessens in gradient and in its lower course flows in a broad sedimentary valley's distinct estuarine plain upriver from Yuma, where it is joined by the Gila River. The Black Canyon is the Canyon where Hoover Dam was built It is located on the Colorado River in the United States. Yuma is a city in and the County seat of Yuma County, Arizona, United States. The Gila /'hilə/ River ( O'odham [Pima]: Gila Akimel) is a Tributary of the Colorado River, 650 Miles (1044 Kilometers The channel through much of this region is bedded in a dike-like embankment lying above the floodplain over which the escaping water spills in time of flood. This dike cuts off the flow of the river to the remarkable low area in southern California known as the Salton Sink, Coachella Valley, or Imperial Valley. The Salton Sink is located in Southeastern California near the Arizona border The Coachella Valley ( pronounced /koʊəˈtʃɛlə/ in English) is a large stretch of land in Southern California that is populated by close to a million The Imperial Valley is a region of southeastern California ( USA) located in part between the Colorado River and the Salton Sea, which The Salton Sink is located below sea level; therefore, the descent from the river near Yuma is very much greater than the descent from Yuma to the gulf.

The lower course of the river, which forms the border between Baja California and Sonora, is essentially a trickle or a dry stream today due to use of the river as Imperial Valley's irrigation source. Baja California (pronounced ˈbɑːhɑː kælɨˈfɔrnjə in English is the northernmost state of Mexico. Sonora is one of the 31 federal states of Mexico and is located in the northwest of the country Prior to the mid 20th century, the Colorado River Delta provided a rich estuarine marshland that is now essentially desiccated, but nonetheless is an important ecological resource. The twentieth century of the Common Era began on The Colorado River Delta is the region of land where the Colorado River historically flowed into the Gulf of California, (the Sea of Cortez)

Elevation summary

Approximate heights above sea level at several key locations:

Note that the significant difference between the present height of the rim of the Grand Canyon (about 8000 ft; 2440 m) and the levels at which the river enters/exits it gives rise to the geologic theory that its upheaval must have begun around the same time the river began flowing through it and eroding it (since rivers do not run uphill, it would have otherwise followed some other path around the upheaval). The State of Colorado ( or chiefly by nonresidents) is a state located in the Rocky Mountain region of the United States of America. Mountain peaks of the Rocky Mountains The Rocky Mountains, often called the Rockies, are a Mountain range in western North America. The State of Colorado ( or chiefly by nonresidents) is a state located in the Rocky Mountain region of the United States of America. The State of Utah (ˈjuːtɔː or) is a western state of the United States. The State of Colorado ( or chiefly by nonresidents) is a state located in the Rocky Mountain region of the United States of America. The State of Utah (ˈjuːtɔː or) is a western state of the United States. The State of Utah (ˈjuːtɔː or) is a western state of the United States. The State of Arizona ( is a state located in the southwestern region of the United States. The State of Utah (ˈjuːtɔː or) is a western state of the United States. The State of Arizona ( is a state located in the southwestern region of the United States. The Grand Canyon The Grand Canyon The Grand Canyon Lake Mead is the largest man-made Lake and Reservoir in the United States. Hoover Dam, also sometimes known as Boulder Dam, is a Concrete Arch-gravity dam in the Black Canyon of the Colorado River, on the California ( is a US state on the West Coast of the United States, along the Pacific Ocean. Nevada ( is a state located in the western region of the United States of America. The State of Arizona ( is a state located in the southwestern region of the United States. California ( is a US state on the West Coast of the United States, along the Pacific Ocean. The State of Arizona ( is a state located in the southwestern region of the United States. The United Mexican States ( or commonly Mexico (ˈmɛksɪkoʊ () is a federal constitutional Republic in North America. The Grand Canyon Estimates for the beginning of this erosion/upheaval process range from 5 to 70 million years ago.

Engineering

Glen Canyon Dam and Lake Powell

In the autumn of 1904, the river's waters escaped into a diversion canal a few miles below Yuma, Arizona, creating the New River and Alamo River. The Alamo River is a River located in California 's Imperial Valley. The rivers re-created in California a great inland sea in an area that it had frequently inundated before, for example, in 1884 and 1891, when it had for a time practically abandoned its former course through Mexican territory to the Sea of Cortez. " Sea of Cortez " redirects here For the book by John Steinbeck, see The Log from the Sea of Cortez. However, it was effectively dammed in the early part of 1907 and returned to its normal course, from which, however, there was still much leakage to the Salton Sea. The Salton Sea is an inland Saline lake, occupying the lowest elevations of the Salton Sink, part of the larger Colorado Desert in Southern In July 1907, the permanent dam was completed. From the Black Canyon towards the sea the Colorado normally flows through a desert-like basin.

From the Hoover Dam

The Colorado River is a major and in some cases life-sustaining source of water for irrigation, drinking, and other uses by people living in the arid American southwest. Allocation of the river's water is governed by the Colorado River Compact. The Colorado River Compact is a 1922 agreement among seven US Several dams have been built along the Colorado River, beginning with Glen Canyon Dam near the Utah-Arizona border. Glen Canyon Dam is a Dam on the Colorado River at Page Arizona, USA operated by the United States Bureau of Reclamation. Other dams include Hoover Dam, Parker Dam, Davis Dam, Palo Verde Diversion Dam, and Imperial Dam. Hoover Dam, also sometimes known as Boulder Dam, is a Concrete Arch-gravity dam in the Black Canyon of the Colorado River, on the Parker Dam is a Concrete Arch-gravity dam which spans the Colorado river, at a point 155 miles (250 km downstream of Hoover Dam The Davis Dam is a Dam on the Colorado River downstream from Hoover Dam (ca The Imperial Dam is a dam near Yuma Arizona (USA built in the 1930s Since the completion of the dams, the majority of the river in normal hydrologic years is diverted for agricultural and municipal water supply. The Colorado's last drops evaporate in the Sonoran Desert, miles before the river reaches the Gulf of California. The Sonoran Desert (sometimes called the Gila Desert after the Gila River or the Low Desert in opposition to the higher Mojave Desert) is Almost 90% of all water diverted from the river is for irrigation purposes. The All-American Canal is the largest irrigation canal in the world and carries a volume of water from 15,000 to 30,000 ft³/s (420 to 850 m³/s), making it larger in volume than New York's Hudson River. The All-American Canal brings Colorado River water to the Imperial Valley in California New York ( is a state in the Mid-Atlantic and Northeastern regions of the United States and is the nation's third most populous The Hudson River, called Muh-he-kun-ne-tuk, the Great Mohegan by the Iroquois, or as the Lenape Native Americans called it in Unami The canal's waters are used to irrigate the parched but fertile Imperial Valley, where several years can pass between measurable rainfalls. Hydrology transport models are used to assess management of the river's flow and water quality. An hydrological transport model is a Mathematical model used to simulate river or Stream flow and calculate water quality parameters

Hoover Dam (originally Boulder Dam, and the first dam of its type) was completed in 1936. Hoover Dam, also sometimes known as Boulder Dam, is a Concrete Arch-gravity dam in the Black Canyon of the Colorado River, on the Its impoundment of the river in the Mojave Desert creates Lake Mead, which provides water for irrigation and the generation of hydroelectric power. For the indigenous American tribe see Mohave. The Mojave Desert (moʊˈhɑːvi or /məˈhɑːvi/ ( Hayikwiir Mat'aar in Mojave Lake Mead is the largest man-made Lake and Reservoir in the United States. Hydroelectricity is electricity generated by Hydropower, ie the production of power through use of the gravitational force of falling water

Several cities such as Los Angeles, Las Vegas, San Bernardino, San Diego, Phoenix, and Tucson have aqueducts leading all the way back to the Colorado River. Los Angeles (lɑˈsændʒələs los ˈaŋxeles in Spanish) is the largest City in the state of California and the American West Las Vegas ( Spanish: "The Meadows" is the most populous City in the state of Nevada, the seat of Clark County, and an internationally Phoenix (ˈfiːˌnɪks O'odham Skikik, Yavapai Wasinka, Western Apache Fiinigis, Navajo Hoozdo, Tucson (ˈtuːsɒn is the seat of Pima County Arizona, United States, located 118 miles (188 km) southeast One such aqueduct is the Central Arizona Project ("CAP") canal, which was begun in the 1970s and finished in the 1990s. The Central Arizona Project (CAP is a 336 mi (541 km diversion canal in Arizona in the United States This article is about the Decade 1970-1979 For the Year 1970 see 1970. The 1990s collectively refers to the years between and including 1990 and 1999 The canal begins at Parker Dam and runs all the way to Phoenix and then Tucson to supplement those cities' water needs.

The lower Colorado is navigable by moderate to large sized craft. The lower river from Davis Dam to Yuma is navigable by large paddlewheel boats and river barges, but commercial navigation on the river is unimportant because the river is cut off from the sea, making other means of transportation more efficient in the region. Before the railroads arrived, the lower Colorado River from the Sea to near present day Laughlin, Nevada was an important means of transportation via large steamers. Laughlin is a Census-designated place (CDP in Clark County, Nevada, United States. Most of the rest of the river, excluding the rapids in the canyons, is navigable by small to moderate sized river craft and power boats.

Colorado River

Moab uranium tailings

Main article: Moab Tailings

Atlas Corporation operated a uranium mine in the area of Moab, Utah, just under three miles from downtown Moab. Moab Tailings is a Uranium mill waste pond situated alongside the Colorado River, currently under the control of the U Uranium (jʊˈreɪniəm is a silvery-gray Metallic Chemical element in the Mining is the extraction of valuable Minerals or other geological materials from the earth usually (but not always from an Ore body For other instances of Moab, see Moab (disambiguation. Moab is a city in Grand County, in eastern Utah, in As a byproduct of mining activities, a ten-million-ton pile of radioactive tailings exists. Tailings (also known as slimes, gangue, tailings pile, tails, leach residue, or slickens) are the materials left over The pile is located about 700-800 feet from the Colorado River. Although no pollution has been detected, proximity of the material to the watershed has been a concern. The Senate has authorized the U.S. Department of Energy to budget $22. The United States Department of Energy ( DOE) is a Cabinet -level department of the United States government responsible for energy policy 8 million in 2007 to begin the project of moving the uranium tailings farther from the river. The plan is to move the pile 15-20 miles north and away from the river. The project is expected to be completed by 2017.

Wildlife

The Colorado River basin is home to fourteen native species of fish. Four are endemic and endangered: Colorado pikeminnow (formerly Colorado squawfish), razorback sucker, bonytail chub, and humpback chub. Endemism is the Ecological state of being unique to a place Endemic species are not naturally found elsewhere An endangered species is a population of an organism which is at risk of becoming Extinct because it is either few in numbers or threatened by changing environmental or predation The razorback sucker, Xyrauchen texanus, is an endangered Fish of rivers in the Colorado River drainage of western North America. The Upper Colorado River Endangered Fish Recovery Program is a controversial effort by the US Fish and Wildlife Service, in conjunction with the Arizona Game and Fish Department, the Colorado Division Of Wildlife, and the Utah Department Of Wildlife to recover these endangered fish. The Upper Colorado River Endangered Fish Recovery Program is a multi-agency partnership to recover endangered fish in the upper Colorado River basin while water development The Arizona Game and Fish Department is tasked with conserving enhancing and restoring Arizona 's diverse Wildlife resources and habitats through aggressive protection

See also

• Colorado River Delta
• Colorado River Compact
• List of Colorado River rapids and features
• List of flora of the Lower Colorado River Valley

References

The Colorado River in James M. The Colorado River Delta is the region of land where the Colorado River historically flowed into the Gulf of California, (the Sea of Cortez) The Colorado River Compact is a 1922 agreement among seven US The following is a list of major rapids and other notable features on the Colorado River, in order of their position downstream of Lees Ferry. This is a List of flora of the (Lower Colorado River Valley. The list also includes Lepidoptera (Butterfly & Moth and Wildflower Robb Colorado River State Park as the Morning Sun rises

This article incorporates text from the Encyclopædia Britannica Eleventh Edition, a publication now in the public domain. The Encyclopædia Britannica Eleventh Edition (1910–1911 is a 29-volume reference work that marked the beginning of the Encyclopædia Britannica The public domain is a range of abstract materials &ndash commonly referred to as Intellectual property &ndash which are not owned or controlled by anyone

External links

• Federal Department of Energy site on uranium mine tailing site.
• State of Utah site on uranium mine tailings.
• Bibliography on Water Resources and International Law See Colorado River. Peace Palace Libray
• Drought Watch Campaign - map of the Colorado River system showing the fill levels of major reservoirs. Last updated July 2004.