Elephant Butte Dam
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Elephant Butte Dam or Elephant Butte Dike, originally Engle Dam, is a concrete
gravity dam A gravity dam is a dam constructed from concrete or stone masonry and designed to hold back water by using only the weight of the material and its resistance against the foundation. Gravity dams are designed so that each section of the dam is ...
on the
Rio Grande The Rio Grande ( or ) in the United States or the Río Bravo (del Norte) in Mexico (), also known as Tó Ba'áadi in Navajo language, Navajo, is one of the principal rivers (along with the Colorado River) in the Southwestern United States a ...
near
Truth or Consequences, New Mexico Truth or Consequences (founded as Hot Springs) is a city in the U.S. state of New Mexico, and the county seat of Sierra County. In 2020, the population was 6,052. It has frequently been noted on lists of unusual place names for having chosen t ...
, in the
United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
. The dam impounds
Elephant Butte Reservoir Elephant Butte Reservoir is a reservoir on the southern part of the Rio Grande in the U.S. state of New Mexico, north of Truth or Consequences, New Mexico, Truth or Consequences. The reservoir is the 84th largest man-made lake in the United Sta ...
, which is used mainly for agriculture but also provides for recreation, hydroelectricity, and flood and sediment control. The construction of the dam has reduced the flow of the Rio Grande to a small stream for most of the year, with water being released only during the summer irrigation season or during times of exceptionally heavy snow melt.


Etymology

Elephant Butte is an exposed
volcanic plug A volcanic plug, also called a volcanic neck or lava neck, is a volcano, volcanic object created when magma hardens within a Volcanic vent, vent on an active volcano. When present, a plug can cause an extreme build-up of high gas pressure if risi ...
in
Sierra County, New Mexico Sierra County () is a county located in the U.S. state of New Mexico. As of the 2020 Census, the population was 11,576. Its county seat is Truth or Consequences. Geography According to the U.S. Census Bureau, the county has a total area of , ...
. The sides of the volcano have eroded away and left only the solidified butte-shaped core. It is now an island in the lake except at low-water levels, when it is connected to land by an
isthmus An isthmus (; : isthmuses or isthmi) is a narrow piece of land connecting two larger areas across an expanse of water by which they are otherwise separated. A tombolo is an isthmus that consists of a spit or bar, and a strait is the sea count ...
. The butte was said to have the shape of an
elephant Elephants are the largest living land animals. Three living species are currently recognised: the African bush elephant ('' Loxodonta africana''), the African forest elephant (''L. cyclotis''), and the Asian elephant ('' Elephas maximus ...
lying on its side, and its name has been applied to the area since before the dam's construction. The nearby city of Elephant Butte was named for the rock formation. The original name of the dam was Engle Dam, after the nearby railroad stop at Engle, New Mexico. The stop was named "Engle" after the construction engineer R.L. Engle and was later renamed to "Engel" by the Santa Fe Railroad after their company's vice president, Edward Engel. Locals complained to Congress about the name change but were unsuccessful in having the name reverted. Today, the stop bears its original name, "Engle." Another name proposed for the dam and used in at least one publication was "
Woodrow Wilson Thomas Woodrow Wilson (December 28, 1856February 3, 1924) was the 28th president of the United States, serving from 1913 to 1921. He was the only History of the Democratic Party (United States), Democrat to serve as president during the Prog ...
Dam," after the former U.S. president. The proposed name for the reservoir was "Lake B.M. Hall," after Bureau of Reclamation engineer Benjamin Mortimer Hall, who championed the project.


History


Drought and floods

Like for many other rivers of the
American Southwest The Southwestern United States, also known as the American Southwest or simply the Southwest, is a geographic and cultural list of regions of the United States, region of the United States that includes Arizona and New Mexico, along with adjacen ...
, runoff in the Rio Grande basin is limited and varies widely from year to year and alternates between devastating droughts and destructive floods. In the 1880s, farmers in the region began to complain that they were not receiving a fair appropriation of river water. By the 1890s, water use in the upper basin was so great that the river's flow near
El Paso, Texas El Paso (; ; or ) is a city in and the county seat of El Paso County, Texas, United States. The 2020 United States census, 2020 population of the city from the United States Census Bureau, U.S. Census Bureau was 678,815, making it the List of ...
, had been reduced to "a trickle in dry summers." To resolve those problems, plans were drafted up for a large storage dam at Elephant Butte, about downstream of
Albuquerque, New Mexico Albuquerque ( ; ), also known as ABQ, Burque, the Duke City, and in the past 'the Q', is the List of municipalities in New Mexico, most populous city in the U.S. state of New Mexico, and the county seat of Bernalillo County, New Mexico, Bernal ...
. The first to propose a dam for the area were Peter E. Kern, E.V. Berrien, John Campbell, R.M. Loomis and Edward Roberts. They had camped in the area where the dam is now; although Kern encouraged the others to consider building a dam there, its construction was delayed by legal battles relating to the final site and to water rights. A site lower far downriver, at the El Paso narrows (the former site of the
ASARCO ASARCO (American Smelting and Refining Company) is a mining, smelting, and refining company based in Tucson, Arizona, which mines and processes primarily copper. The company has been a subsidiary of Grupo México since 1999. Its three largest ...
plant at Smeltertown), was considered for a dam, but it would have flooded much of the lower
Mesilla Valley The Mesilla Valley is a geographic feature of Southern New Mexico and far West Texas. It was formed by repeated heavy spring floods of the Rio Grande. Background The fertile Mesilla Valley extends from Radium Springs, New Mexico, to the west ...
and interfered with railway and other transportation. The site at Elephant Butte was chosen for those reasons and for its mountainous location, which created a natural basin for a reservoir. The river at the site was "too thin to plow, too thick to drink." The proposed dam featured in the 1906 Boundary Waters Convention between the United States and Mexico, which also specified how much water should be delivered to Mexico after the dam's completion. A private dam project backed by British investors was in the works in 1894 just upstream from the dam site and also by the
U.S. Department of the Interior The United States Department of the Interior (DOI) is an executive department of the U.S. federal government responsible for the management and conservation of most federal lands and natural resources. It also administers programs relating t ...
. It was eventually blocked by the
U.S. Secretary of State The United States secretary of state (SecState) is a member of the executive branch of the federal government of the United States and the head of the U.S. Department of State. The secretary of state serves as the principal advisor to the p ...
"on basis of a technicality that the Rio Grande was arguably a navigable river and permission from the War Department was also needed." Although delayed by legal issues, the injunction against building the dam was lifted in 1897. However, the project failed to proceed, and the investors lost their rights to build the private dam in 1903. With The Victorio Land and Cattle Co. owned about three fourths of the site and in 1909 demanded the government pay $17.83 per acre, instead of the substantially lower offer of $1.83 per acre. A lengthy court battle ensued, and the US government condemned 24,730 acres of the company's land and settled on a price of $6.66 per acre for the remaining 30,000 acres.


Construction

The
U.S. Congress The United States Congress is the legislative branch of the federal government of the United States. It is a bicameral legislature, including a lower body, the U.S. House of Representatives, and an upper body, the U.S. Senate. They both ...
passed the Newlands Reclamation Act in 1902, authorizing the
Rio Grande Project The Rio Grande Project is a United States Bureau of Reclamation irrigation, hydroelectricity, flood control, and interbasin water transfer project serving the upper Rio Grande basin in the southwestern United States. The project irrigates along ...
to provide power and irrigation to south-central New Mexico and western Texas as a Bureau of Reclamation undertaking. For the next two years, surveyors and engineers undertook a comprehensive feasibility study for the project's dams and reservoirs. Construction of the dam was authorized on February 25, 1905, and began in 1911. To accommodate the dam's construction, crews built and improved roads and constructed a Bureau of Reclamation office, water tanks, worker camps, a machine shop, a power plant, and a hospital. A system of three cables, each having a capacity of 15 tons and a span of , was suspended across the canyon over the site. At its peak, the camps housed around 3,500 workers. Two worker camps housed them. The "Upper Camp" was built upstream and housed affluential and skilled workers, such as supervisors and engineers. The "Lower Camp" was downstream of the site, housed the less influential laborers, and was further segregated by American and Mexican workers living in separate areas of the camp. Upper Camp was inundated by the dam's own reservoir, but although it was on dry land, Lower Camp has no trace remaining. During its construction, the dam was the largest irrigation dam ever built except for the
Aswan Dam The Aswan Dam, or Aswan High Dam, is one of the world's largest embankment dams, which was built across the Nile in Aswan, Egypt, between 1960 and 1970. When it was completed, it was the tallest earthen dam in the world, surpassing the Chatuge D ...
, in
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, and impounded the world's largest artificial lake. It was expected that the dam would become the property of the local settlers once a water tax had reimbursed the government for the cost of construction. Elephant Butte Dam was designated as a
National Historic Civil Engineering Landmark __NOTOC__ The following is a list of Historic Civil Engineering Landmarks as designated by the American Society of Civil Engineers since it began the program in 1964. The designation is granted to projects, structures, and sites in the United Stat ...
by the
American Society of Civil Engineers The American Society of Civil Engineers (ASCE) is a tax-exempt professional body founded in 1852 to represent members of the civil engineering profession worldwide. Headquartered in Reston, Virginia, it is the oldest national engineering soci ...
in 1976. The dam and Bureau of Reclamation office were listed on the U.S.
National Register of Historic Places The National Register of Historic Places (NRHP) is the Federal government of the United States, United States federal government's official United States National Register of Historic Places listings, list of sites, buildings, structures, Hist ...
in 1979. With Historic resources from the era of construction of the dam, as well as from the
New Deal The New Deal was a series of wide-reaching economic, social, and political reforms enacted by President Franklin D. Roosevelt in the United States between 1933 and 1938, in response to the Great Depression in the United States, Great Depressi ...
era development of power generation and recreation facilities in the area, were recognized in the 1997 listing of a area on the National Register as the Elephant Butte Historic District. The historic district listing includes the dam and surrounding historic structures. With


Characteristics

Elephant Butte Dam is 301 feet (91.7 m) high, 1,674 feet (510.2 m) long including the spillway and is made from 618,785 cubic yards (473,095 m³) of concrete. The width at the top of the dam is 18 feet (5.5 m) and 228 feet (69.5 m) at the base. The reservoir has a capacity of of water and controls the runoff from 28,900 square miles (74,850 km²). It provides irrigation to 178,000 acres (720 km²) of land. The dam also contains a 28 MW
hydroelectric Hydroelectricity, or hydroelectric power, is Electricity generation, electricity generated from hydropower (water power). Hydropower supplies 15% of the world's electricity, almost 4,210 TWh in 2023, which is more than all other Renewable energ ...
powerplant. The current turbine was installed in 1940 and generates 38,449,061 kWh per year (as of 2005).


See also

* * * List of Rio Grande dams and diversions *
Caballo Dam Caballo Dam is an earthen dam on the Rio Grande about downstream from Truth or Consequences, New Mexico, United States. In conjunction with Elephant Butte Dam, which lies about upstream, it regulates the discharge of the river in the lower Rio ...
* National Register of Historic Places listings in Sierra County, New Mexico


References


External links

* * {{Authority control Dams in New Mexico Dams on the Rio Grande Buildings and structures in Sierra County, New Mexico Dams completed in 1916 Dams on the National Register of Historic Places in New Mexico Historic Civil Engineering Landmarks United States Bureau of Reclamation dams National Register of Historic Places in Sierra County, New Mexico 1916 establishments in New Mexico