Mansfield Dam (formerly Marshall Ford Dam) is a

dam A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use, aqua ...

located across a

canyon A canyon (; archaic British English spelling: ''cañon''), gorge or chasm, is a deep cleft between escarpments or cliffs resulting from weathering and the erosive activity of a river over geologic time scales. Rivers have a natural tendency t ...

at Marshall Ford on the

Colorado River The Colorado River () is one of the principal rivers (along with the Rio Grande) in the Southwestern United States and in northern Mexico. The river, the List of longest rivers of the United States (by main stem), 5th longest in the United St ...

, northwest of

Austin, Texas Austin ( ) is the List of capitals in the United States, capital city of the U.S. state of Texas. It is the county seat and most populous city of Travis County, Texas, Travis County, with portions extending into Hays County, Texas, Hays and W ...

. The groundbreaking ceremony occurred on February 19, 1937, with

United States Secretary of the Interior The United States secretary of the interior is the head of the United States Department of the Interior. The secretary and the Department of the Interior are responsible for the management and conservation of most federal land along with natura ...

Harold L. Ickes Harold LeClair Ickes ( ; March 15, 1874 – February 3, 1952) was an American administrator, politician and lawyer. He served as United States Secretary of the Interior for nearly 13 years from 1933 to 1946, the longest tenure of anyone to hold th ...

attending. The dam was a joint project by the Lower Colorado River Authority (LCRA) and the

United States Bureau of Reclamation The Bureau of Reclamation, formerly the United States Reclamation Service, is a federal agency under the U.S. Department of the Interior, which oversees water resource management, specifically as it applies to the oversight and operatio ...

, with partial funding provided by the

Public Works Administration The Public Works Administration (PWA), part of the New Deal of 1933, was a large-scale public works construction agency in the United States headed by United States Secretary of the Interior, Secretary of the Interior Harold L. Ickes. It was ...

. Brown and Root, headed by James E. Walters, Sr., was the prime contractor. The dam was completed in 1941. Originally called Marshall Ford Dam, the name was changed in 1941 in honor of

United States Representative The United States House of Representatives is a chamber of the Bicameralism, bicameral United States Congress; it is the lower house, with the U.S. Senate being the upper house. Together, the House and Senate have the authority under Artic ...

J.J. Mansfield. The

reservoir A reservoir (; ) is an enlarged lake behind a dam, usually built to water storage, store fresh water, often doubling for hydroelectric power generation. Reservoirs are created by controlling a watercourse that drains an existing body of wa ...

behind Mansfield Dam is named

Lake Travis Lake Travis is a reservoir on the Colorado River in central Texas in the United States. It is named in honor of William B. Travis. Serving principally as a flood-control reservoir, Lake Travis' historical minimum to maximum water height cha ...

. The dam is owned and operated by the LCRA. Dedication monument Mansfield Dam

Mansfield Dam is high, long, and thick at the base. The concrete gravity dam with embankment wings and saddle dikes was designed to control

flood A flood is an overflow of water (list of non-water floods, or rarely other fluids) that submerges land that is usually dry. In the sense of "flowing water", the word may also be applied to the inflow of the tide. Floods are of significant con ...

ing; to store 1.4 km³ (369 billion US gallons) of

water Water is an inorganic compound with the chemical formula . It is a transparent, tasteless, odorless, and Color of water, nearly colorless chemical substance. It is the main constituent of Earth's hydrosphere and the fluids of all known liv ...

; and to generate

hydroelectric power 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 ...

(108 megawatts). The Spillway Elevation is above

Mean Sea Level A mean is a quantity representing the "center" of a collection of numbers and is intermediate to the extreme values of the set of numbers. There are several kinds of means (or "measures of central tendency") in mathematics, especially in statist ...

(MSL). LCRA begins to open floods gates when water reaches 681 feet above MSL. At above MSL, discharge capacity exceeds as the lake rises. The two lanes of Mansfield Dam Road, formerly RM 620, traverse the top of the dam, but traffic other than service vehicles are now prohibited. 620 was rerouted in 1995 to a four-lane highway bridge on the downstream side of the dam built for increase in traffic due to the popularity in Austin of recreating at Lake Travis.

Political History

Lyndon B. Johnson Lyndon Baines Johnson (; August 27, 1908January 22, 1973), also known as LBJ, was the 36th president of the United States, serving from 1963 to 1969. He became president after the assassination of John F. Kennedy, under whom he had served a ...

ran for his first elected office as

for Texas's 10th congressional district (where the Mansfield Dam was located). His campaign was backed by the dam's contractors, and his success in clearing funding and regulatory hurdles for the dam shortly after his election is considered a cornerstone of his future political career.

References

External links

LCRA Website

Current Water Level Conditions

Buildings and structures in Austin, Texas Dams in Texas Buildings and structures in Travis County, Texas Hydroelectric power plants in Texas United States Bureau of Reclamation dams Lower Colorado River Authority dams Dams completed in 1941 Energy infrastructure completed in 1941 Bridges in Austin, Texas Crossings of the Colorado River (Texas) Public Works Administration in Texas {{Austin-stub

Political History

See also

References

External links