"A project of the Bureau of Reclamation, they hired General Construction Company from Seattle to build the dam. Former Oregonian and then United States President Herbert Hoover dedicated what was the highest dam of its type in the world on July 17, 1932. Secretary of the Interior Ray Lyman Wilbur delivered Hoover's message at the dam. Owyhee's construction served as a prototype for the larger Hoover Dam on the Colorado River, including the use of refrigeration to cool the concrete. The dam cost $6,000,000, with the total reclamation project costing $18,000,000. Owyhee was designed by Frank A. Banks, who also"
"Hoover Dam (Ohio) Hoover Dam, in Blendon Township, near Westerville, Ohio, dams the Big Walnut Creek to form the Hoover Memorial Reservoir. This reservoir is a major water source for the city of Columbus, Ohio. It holds of water and has a surface area of , or about five square miles. Construction began during 1953 due to the increased water demand of post-war Columbus. The project was completed and dedicated in 1955 and the dam officially opened in 1958. It was named for two brothers, Charles P. Hoover and Clarence B. Hoover, to honor their careers with the City of"
"Hoover Dam and the resulting rise in the waters of the Colorado River forced the abandonment of the town, with the last resident, Hugh Lord, leaving June 11, 1938. The ruins of St. Thomas, which became visible after the water level in Lake Mead lowered, are protected by the National Park Service as a historic site. The cemetery was relocated to Overton, Nevada where there is a St. Thomas interpretive center with a staff archaeologist doing on-going research into the history and settlement of the Muddy River. The novel Lords of St. Thomas (GWP, 2018) by Jackson Ellis tells the"
"Columbus Waterworks. Hoover Dam (Ohio) Hoover Dam, in Blendon Township, near Westerville, Ohio, dams the Big Walnut Creek to form the Hoover Memorial Reservoir. This reservoir is a major water source for the city of Columbus, Ohio. It holds of water and has a surface area of , or about five square miles. Construction began during 1953 due to the increased water demand of post-war Columbus. The project was completed and dedicated in 1955 and the dam officially opened in 1958. It was named for two brothers, Charles P. Hoover and Clarence B. Hoover, to honor their careers with the"
"March 1, 1936, more than two years ahead of schedule. Hoover Dam impounds Lake Mead, the largest reservoir in the United States by volume (when it is full). The dam is located near Boulder City, Nevada, a municipality originally constructed for workers on the construction project, about southeast of Las Vegas, Nevada. The dam's generators provide power for public and private utilities in Nevada, Arizona, and California. Hoover Dam is a major tourist attraction; nearly a million people tour the dam each year. The heavily traveled U.S. Route 93 (US 93) ran along the dam's crest until October 2010, when"
"the river might change course and empty into the Salton Sea. The Board cautioned: ""To avoid such possibilities, the proposed dam should be constructed on conservative if not ultra-conservative lines."" On December 21, 1928, President Coolidge signed the bill authorizing the dam. The Boulder Canyon Project Act appropriated $165 million for the Hoover Dam along with the downstream Imperial Dam and All-American Canal, a replacement for Beatty's canal entirely on the U.S. side of the border. It also permitted the compact to go into effect when at least six of the seven states approved it. This occurred on March 6,"
"Lake Mohave Lake Mohave is a reservoir on the Colorado River between the Hoover Dam and Davis Dam in Cottonwood Valley defining the border between Nevada and Arizona in the United States. This 67 mile stretch of the Colorado River flows past Boulder City, Nelson, Searchlight, Cottonwood Cove, Cal-Nev-Ari, and Laughlin to the west in Nevada and Willow Beach and Bullhead City to the east in Arizona. A maximum width of 4 miles wide and an elevation of , Lake Mohave encompasses 28,260 acres of water. As Lake Mead lies to the north of the Hoover Dam, Lake Mohave and"
"Hoover Dam in the 1930s marked the beginning of the modern era for the Colorado River Delta. For six years, as Lake Mead filled behind the dam, virtually no freshwater reached the delta. Even spring flooding was captured. This ecologically devastating event was repeated from 1963 to 1981 as Lake Powell filled behind the Glen Canyon Dam. With these reservoirs now filled, the dams are used to regulate flow so that water can be reliably apportioned among the users of the Colorado River Compact, and its use maximized. Most flood flows can be contained, regulated, and added to the river's"
"Hoover Dam construction, to direct operations at Shasta Dam. The groundbreaking and official naming ceremony of Shasta Dam occurred on September 12, 1937 in the small town of Kennett shortly upstream of the dam. Congress initially approved $12 million for the project. Within five years Kennett would be submerged under the rising waters of Shasta Lake. The dam was initially known as Kennett Dam, but was eventually named after nearby Mount Shasta. After surveying several nearby sites, the Bureau of Reclamation chose to build the dam in a deep canyon about a mile above the abandoned smelter town of Coram"
"until the mid-19th century, long stretches of the Colorado and Green rivers between Wyoming and Nevada remained largely unexplored due to their remote location and dangers of navigation. Because of the dramatic drop in elevation of the two rivers, there were rumors of huge waterfalls and violent rapids, and Native American tales strengthened their credibility. 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. Powell and nine men – none of whom had"
"programs. Federal money started arriving with the Federal Emergency Relief Committee in 1930. Different agencies promoted aid to the unemployed, tuberculosis patients, transients, and illegal immigrants. The money ran out by 1931 or 1932, and conditions were bad until New Deal relief operations began on a large scale in 1933. Construction programs were important, especially Hoover Dam (originally called Boulder Dam), begun by President Herbert Hoover. It is a concrete arch-gravity dam in the Black Canyon of the Colorado River, on the border with Nevada. It was constructed by the Federal Bureau of Reclamation between 1931 and 1936. It operationalized"
"Davis Dam in Pyramid Canyon above Laughlin, Nevada, where a bridge carries NV 163 (Laughlin Highway)/AZ 95 over the Colorado River. Prior to the completion of the Hoover Dam Bypass project in 2010, this bridge was the main crossing for freight traffic between Arizona and Nevada as trucks were not allowed over Hoover Dam for security reasons after the September 11, 2001 attacks. The Colorado then passes by Bullhead City, Arizona and Fort Mohave, Arizona and the Fort Mojave Reservation. The Colorado forms the border of California to the west and Arizona to the east for most of its course"
"years of the Colorado's flow. The construction of Hoover was a major step towards stabilizing the lower channel of the Colorado River, storing water for irrigation in times of drought, and providing much-needed flood control as part of a program known as the Boulder Canyon Project. Hoover was the tallest dam in the world at the time of construction and also had the world's largest hydroelectric power plant. Flow regulation from Hoover Dam opened the doors for rapid development on the lower Colorado River; Imperial and Parker dams followed in 1938, and Davis Dam was completed in 1950. Completed in"
"impoundment area of the Blackwater Dam in the town of Webster. Below the reservoir dam, the Blackwater encounters a short, intense whitewater stretch before flattening again for the final miles to the Contoocook in Hopkinton. Blackwater River (Contoocook River tributary) The Blackwater River is a river located in central New Hampshire in the United States. It is a tributary of the Contoocook River, part of the Merrimack River watershed. The Blackwater River is formed at Cilleyville, a village in the western part of the town of Andover, by the junction of two branch streams that lack official names on current"
"into the Virgin River, which ran southward through what is now Overton Arm to join the Colorado River near the now-ghost town of St. Thomas, Nevada. At Hoover Dam, the Colorado turns due south through Black Canyon, a direction it will follow for the remainder of its course to the Gulf of California. It passes under the Mike O'Callaghan–Pat Tillman Memorial Bridge (Hoover Dam Bypass), the highest concrete arch bridge in the world, carrying U.S. Route 93 at a height of above the Colorado River. At the end of Black Canyon the Colorado widens into Lake Mohave, created by the"
"too much of the lower basin allotment; in 1944 a compromise was reached in which Arizona would get a firm allocation of , but only if California's allocation was prioritized during drought years. 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. On September 30, 1935, the United States Bureau of Reclamation (USBR) completed Hoover Dam in the Black Canyon of the Colorado River. Behind the dam rose Lake Mead, the largest artificial lake in the U.S., capable of holding more than two"
"conduit and siphons. Average annual throughput is . Davis Dam is located on the Colorado River about downstream from Hoover Dam. Davis Dam stretches across the border between Arizona and Nevada and impounds the Colorado River to form Lake Mohave. The United States Bureau of Reclamation owns and operates the dam, which was completed in 1951. Davis Dam is a zoned earth fill dam with a concrete spillway, in length at the crest, and high. The earth fill dam begins on the Nevada side, but it does not extend to the Arizona side. Instead, there is an inlet formed by"
"the ""Law of the River"". 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. Most of the major dams were built between 1910 and 1970; the system keystone, Hoover Dam, was completed in 1935. The Colorado is now considered among the most controlled and litigated rivers in the world, with every drop of its water fully allocated. The environmental movement in the American Southwest has opposed the damming and diversion of the Colorado River system because of detrimental effects on the ecology and"
"as 2 billion years. The of the river that flow through the Grand Canyon are largely encompassed by Grand Canyon National Park and are known for their difficult whitewater, separated by pools that reach up to in depth. At the lower end of Grand Canyon, the Colorado widens into Lake Mead, the largest reservoir in the continental United States, formed by Hoover Dam on the border of Arizona and Nevada. Situated southeast of metropolitan Las Vegas, the dam is an integral component for management of the Colorado River, controlling floods and storing water for farms and cities in the lower"
"Hoover Dam Police The Hoover Dam Police, officially the Bureau of Reclamation Police, was a federal security police force, stationed at Hoover Dam southeast of Las Vegas, Nevada. Reclamation Police Officers were stationed only at Hoover Dam. Hoover Dam was both listed on the National Register of Historic Places in 1981, and was designated a National Historic Landmark in 1985. Hoover Dam has been designated as National Critical Infrastructure. The primary responsibilities of the Hoover Dam Police Officer were to protect the dam, the world's 57th-largest hydroelectric generating station, which provides about 2,080 megawatts, its associated structures, and to safeguard"
"springs that can be found by taking a trail north from a larger bay about south of the Hoover Dam. Black Canyon of the Colorado The Black Canyon of the Colorado is the canyon on the Colorado River where Hoover Dam was built. The canyon is located on the Colorado River at the state line between Nevada and Arizona. The western wall of the gorge is in the El Dorado Mountains, and the eastern wall is in the Black Mountains of Arizona. The canyon formed about 15 million years ago during the Miocene Basin and Range uplift. Black Canyon gets"
"Black Canyon of the Colorado The Black Canyon of the Colorado is the canyon on the Colorado River where Hoover Dam was built. The canyon is located on the Colorado River at the state line between Nevada and Arizona. The western wall of the gorge is in the El Dorado Mountains, and the eastern wall is in the Black Mountains of Arizona. The canyon formed about 15 million years ago during the Miocene Basin and Range uplift. Black Canyon gets its name from the black volcanic rocks that are found throughout the area. Just south of the Hoover Dam on"
"was abandoned in favor of a site lower on the Colorado, where Hoover Dam was completed in 1936. In the 1960s, the area was again investigated as part of the U.S. Bureau of Reclamation's Colorado River Storage Project, and that assessment culminated in the construction of Glen Canyon Dam in 1966. The filling of the resulting Lake Powell of 24.3 million acre feet (30.0 km) inundated the Crossing of the Fathers, Charles Spencer's old mining operation, and other historic landmarks of the area. Flood control at Glen Canyon also smoothed out the seasonal flux of the Colorado River that so"
"Lower Colorado River Valley The Lower Colorado River Valley (""LCRV"") is the river region of the lower Colorado River of the southwestern United States in North America that rises in the Rocky Mountains and has its outlet at the Colorado River Delta in the northern Gulf of California in northwestern Mexico, between the states of Baja California and Sonora. This north–south stretch of the Colorado River forms the border between the U.S. states of California/Arizona and Nevada/Arizona, and between the Mexican states of Baja California/Sonora. It is commonly defined as the region from below Hoover Dam and Lake Mead to"
"rights on the Colorado. It sells water to 95 percent of the South Coast region. Lake Mead, formed by Hoover Dam, is the primary reservoir in the Colorado River basin. The Colorado River Aqueduct begins downstream from Hoover Dam, and can carry annually. An additional system diverts water from the Colorado River at the Imperial Diversion Dam provides waters to the Imperial and Coachella valleys as well as Yuma, Arizona, via the Alamo Canal, the Coachella Canal and the All-American Canal, which runs alongside the Mexican border. This system was also responsible for the accidental re-creation of the Salton Sea"
"of overhead cables to allow the pneumatic concrete to be pumped at any point on the construction site. With this technique, Crowe built some of the largest dams in the American west, including the Hoover Dam, Parker Dam downstream from Hoover; Copper Basin and Gene Wash Dams on the Colorado Aqueduct system; and Shasta Dam in Northern California. All these dams were important but none approached the mythic scale or mystique of Hoover Dam. He retired in 1944 to his cattle ranch near Redding, California, where he died of a heart attack on February 26, 1946. The Hoover Dam construction"
"after setting aside 5% of Hoover Dam's power for sale to Native American tribes, electric cooperatives, and other entities. The new arrangement began on October 1, 2017. The Bureau of Reclamation reports that the energy generated under the contracts ending in 2017 was allocated as follows: The dam is protected against over-topping by two spillways. The spillway entrances are located behind each dam abutment, running roughly parallel to the canyon walls. The spillway entrance arrangement forms a classic side-flow weir with each spillway containing four and steel-drum gates. Each gate weighs and can be operated manually or automatically. Gates are"
"of Hoover Dam. Construction of the bridge approaches began in 2003, and construction of the bridge itself began in February 2005. The bridge was completed in 2010 and the entire bypass route opened to vehicle traffic on October 19, 2010. The Hoover Dam Bypass project was completed within budget at a cost of $240 million; the bridge portion cost $114 million. The bridge was the first concrete-steel composite arch bridge built in the United States, and incorporates the widest concrete arch in the Western Hemisphere. At above the Colorado River, it is the second highest bridge in the United States"
"certain points. The west branch of the river includes two hydroelectric dams in West Hartland and Colebrook, run by Connecticut's Metropolitan District Commission. The largest dam on the east branch is the Saville Dam, which impounds the Barkhamsted Reservoir. The Rainbow Dam, a dam with a hydroelectric generator and a fish ladder, dams the river at Windsor, a few miles before the river flows into the Connecticut River. A number of other dams have been built on the river since European settlement, usually to power mills and other industry. A few, such as in Collinsville, are still mostly intact. The"
"steamboats as they passed over the dangerous rapids of Devil's Gate Canyon, during their high water runs to the mouth of the Virgin River at Rioville, Nevada. Boulder Canyon (Colorado River) Boulder Canyon, originally Devils Gate Canyon, is a canyon on the Colorado River, above Hoover Dam, now flooded by Lake Mead. It lies between Clark County, Nevada and Mohave County, Arizona. It heads at western end of the Virgin River Basin of Lake Mead, at about . Boulder Canyon divides the Black Mountains into the Black Mountains of Arizona, and the Black Mountains of Nevada. Its mouth is now"
"Wheeler Dam Wheeler Dam is a hydroelectric dam on the Tennessee River between Lauderdale County and Lawrence County in the U.S. state of Alabama. It is one of nine dams on the river owned and operated by the Tennessee Valley Authority, which built the dam in the mid-1930s as part of a New Deal-era initiative to improve navigation on the river and bring flood control and economic development to the region. The dam impounds the Wheeler Lake of and its tailwaters feed into Wilson Lake. Wheeler Dam is named for Civil War general and U.S. Congressman Joseph Wheeler. Congressman Wheeler"
"the Washington Society of Engineers. He served as the Director of the Reclamation Service (now the U.S. Bureau of Reclamation) from 1914 to 1923. Boulder Dam (later called Hoover Dam) was fundamentally the conception of Arthur Powell Davis. A month before he died, Arthur Powell Davis was appointed Consulting Engineer on the dam project. Mr. Davis had his vision back in 1902. He died in Oakland, California, on August 7, 1933, and is buried in St. Paul’s Rock Creek Cemetery in Washington, D.C., along with his wife, Elizabeth B. Davis. The Davis Dam is named after him. Arthur Davis brought"
"Boulder Canyon (Colorado River) Boulder Canyon, originally Devils Gate Canyon, is a canyon on the Colorado River, above Hoover Dam, now flooded by Lake Mead. It lies between Clark County, Nevada and Mohave County, Arizona. It heads at western end of the Virgin River Basin of Lake Mead, at about . Boulder Canyon divides the Black Mountains into the Black Mountains of Arizona, and the Black Mountains of Nevada. Its mouth is now under the eastern end of the Boulder Basin of Lake Mead, between Canyon Point in Nevada and Canyon Ridge in Arizona. Its original mouth is now underneath"