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Coordinates: 30°23′32″N 97°54′26″W / 30.39222°N 97.90722°W / 30.39222; -97.90722
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{{Short description|Dam on the Colorado River near Austin, Texas, United States}}

{{Infobox dam
{{Infobox dam
| name = Mansfield Dam
| name = Mansfield Dam
| image = MansfieldDam2018.jpg
| image = MansfieldDam2018.jpg
| image_size = 250px
| image_size = 250px
| image_caption = Mansfield Dam in November of 2018
| image_caption = Mansfield Dam, November 2018
| name_official = Mansfield Dam
| name_official = Mansfield Dam
| dam_crosses = [[Colorado River (Texas)|Colorado River]]
| dam_crosses = [[Colorado River (Texas)|Colorado River]]
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'''Mansfield Dam''' (formerly '''Marshall Ford Dam''') is a [[dam]] located across a [[canyon]] at Marshall Ford on the [[Colorado River (Texas)|Colorado River]], {{convert|13|mi|km|0}} northwest of [[Austin, Texas]]. The groundbreaking ceremony occurred on February 19, 1937, with [[United States Secretary of the Interior]] [[Harold L. Ickes]] attending. The dam was a joint project by the [[Lower Colorado River Authority]] (LCRA) and the [[United States Bureau of Reclamation]], with partial funding provided by the [[Public Works Administration]]. Brown and Root, headed by James E. Walters, Sr., was the prime contractor.<ref>{{Cite web|url=https://www.lib.utexas.edu/taro/ricewrc/00054/rice-00054.html|title=Guide to the Brown & Root / George R. Brown Executive Files, 1937-1978 MS 488|website=www.lib.utexas.edu|language=en|access-date=2017-03-22}}</ref> The dam was completed in 1941. Originally called Marshall Ford Dam, the name was changed in 1941 in honor of [[United States House of Representatives|United States Representative]] [[Joseph J. Mansfield|J.J. Mansfield]]. The [[reservoir (water)|reservoir]] behind Mansfield Dam is named [[Lake Travis]]. The dam is owned and operated by the LCRA.
'''Mansfield Dam''' (formerly '''Marshall Ford Dam''') is a [[dam]] located across a [[canyon]] at Marshall Ford on the [[Colorado River (Texas)|Colorado River]], {{convert|13|mi|km|0}} northwest of [[Austin, Texas]]. The groundbreaking ceremony occurred on February 19, 1937, with [[United States Secretary of the Interior]] [[Harold L. Ickes]] attending. The dam was a joint project by the [[Lower Colorado River Authority]] (LCRA) and the [[United States Bureau of Reclamation]], with partial funding provided by the [[Public Works Administration]]. Brown and Root, headed by James E. Walters, Sr., was the prime contractor.<ref>{{Cite web|url=https://www.lib.utexas.edu/taro/ricewrc/00054/rice-00054.html|title=Guide to the Brown & Root / George R. Brown Executive Files, 1937-1978 MS 488|website=www.lib.utexas.edu|language=en|access-date=2017-03-22}}</ref> The dam was completed in 1941. Originally called Marshall Ford Dam, the name was changed in 1941 in honor of [[United States House of Representatives|United States Representative]] [[Joseph J. Mansfield|J.J. Mansfield]]. The [[reservoir (water)|reservoir]] behind Mansfield Dam is named [[Lake Travis]]. The dam is owned and operated by the LCRA.


[[File:Dedication monument Mansfield Dam.jpg|thumb|left|The dedication at Mansfield Dam, August 2023]]
Mansfield Dam is {{convert|278|ft|m|0}} high, {{convert|7089|ft|km|0}} long, and {{convert|213|ft|m|0}} thick at the base. The concrete gravity dam with [[embankment dam|embankment]] wings and saddle [[Dike (construction)|dike]]s was designed to control [[flood]]ing; to store 1.4&nbsp;km³ (369 billion US gallons) of [[water]]; and to generate [[hydroelectric power]] (108 megawatts). The Spillway Elevation is {{convert|714|feet}} above [[Sea level|Mean Sea Level]] (MSL). LCRA begins to open floods gates when water reaches 681 feet above MSL. At {{convert|681|feet}} above MSL, discharge capacity exceeds {{convert|130,000|ft3/s}} as the lake rises.
Mansfield Dam is {{convert|278|ft|m|0}} high, {{convert|7089|ft|km|0}} long, and {{convert|213|ft|m|0}} thick at the base. The concrete gravity dam with [[embankment dam|embankment]] wings and saddle [[Dike (construction)|dike]]s was designed to control [[flood]]ing; to store 1.4&nbsp;km<sup>3</sup> (369 billion US gallons) of [[water]]; and to generate [[hydroelectric power]] (108 megawatts). The Spillway Elevation is {{convert|714|feet}} above [[Sea level|Mean Sea Level]] (MSL). LCRA begins to open floods gates when water reaches 681 feet above MSL. At {{convert|681|feet}} above MSL, discharge capacity exceeds {{convert|130,000|ft3/s}} as the lake rises.


The two lanes of Mansfield Dam Road, formerly [[Ranch to Market Road 620|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.<ref>{{Cite web|url=https://bridgestunnels.com/location/mansfield-dam-road-formerly-tx-ranch-to-market-road-620/|title=Mansfield Dam Road (Formerly TX Ranch to Market Road 620) - Bridges and Tunnels |website=bridgestunnels.com|language=en|access-date=2022-06-08}}</ref>
The two lanes of Mansfield Dam Road, formerly [[Ranch to Market Road 620|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.<ref>{{Cite web|url=https://bridgestunnels.com/location/mansfield-dam-road-formerly-tx-ranch-to-market-road-620/|title=Mansfield Dam Road (Formerly TX Ranch to Market Road 620) - Bridges and Tunnels |website=bridgestunnels.com|language=en|access-date=2022-06-08}}</ref>


==Political History==
==Political History==
[[Lyndon B. Johnson]] ran for his first elected office as [[United States House of Representatives|United States Representative]] 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. <ref>{{cite book |last=Caro |first=Robert |title=The Years of Lyndon Johnson: The Path to Power |pages=648 and Chapters 20, 22, and 23 |publisher=[[Alfred A. Knopf]] |year=1982 |isbn=978-0679729457}}</ref>
[[Lyndon B. Johnson]] ran for his first elected office as [[United States House of Representatives|United States Representative]] 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.<ref>{{cite book |last=Caro |first=Robert |title=The Years of Lyndon Johnson: The Path to Power |pages=648 and Chapters 20, 22, and 23 |publisher=[[Alfred A. Knopf]] |year=1982 |isbn=978-0679729457}}</ref>

==See also==
⚫
{{stack|{{Portal|Renewable energy|Texas}}}}
* [[List of dams and reservoirs in Texas]]
<br>


==References==
==References==
{{Reflist}}
{{reflist|22em}}


==External links==
==External links==
{{Commons category|Mansfield Dam}}
{{commons category|Mansfield Dam}}
* [https://www.lcra.org/water/dams-and-lakes/#mansfield LCRA Website]
⚫
{{stack|{{Portal|Texas|Water|Renewable energy}}}}
*[http://www.lcra.org/water/dams-and-lakes/Pages/mansfield-dam.aspx LCRA Website]
* [https://hydromet.lcra.org/Reports/LakeLevel Current Water Level Conditions]
⚫
* [https://web.archive.org/web/20090806091006/https://library.rice.edu/collections/WRC/finding-aids/manuscripts/0488]
*[https://hydromet.lcra.org/Reports/LakeLevel Current Water Level Conditions]

⚫
*[https://web.archive.org/web/20090806091006/https://library.rice.edu/collections/WRC/finding-aids/manuscripts/0488]


{{Colorado River (Texas) dams}}
{{Colorado River (Texas) dams}}
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|downstream signs=[[File:Texas RM 620.svg|25px]]
|downstream signs=[[File:Texas RM 620.svg|25px]]
}}
}}

{{authority control}}



[[Category:Buildings and structures in Austin, Texas]]
[[Category:Buildings and structures in Austin, Texas]]
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[[Category:Bridges in Austin, Texas]]
[[Category:Bridges in Austin, Texas]]
[[Category:Crossings of the Colorado River (Texas)]]
[[Category:Crossings of the Colorado River (Texas)]]
[[Category:Public Works Administration in Texas]]


{{Austin-stub}}

Latest revision as of 21:29, 18 May 2024

Mansfield Dam
Mansfield Dam, November 2018
Official nameMansfield Dam
LocationTravis County, Texas, USA
Coordinates30°23′32″N 97°54′26″W / 30.39222°N 97.90722°W / 30.39222; -97.90722
Construction began1937
Opening date1941
Operator(s)Lower Colorado River Authority
Dam and spillways
ImpoundsColorado River
Height278 feet (85 m)
Length7,089 feet (2,161 m)
Width (base)213 feet (65 m)
Spillway type24 controlled (paradox and jet-flow gates)
Spillway capacity130,000 cu ft/s (3,700 m3/s) (23 floodgates at 5,250 cfs; 1 variable discharge gate at 2,285 cfs 2 turbines at 4,100 cfs, 1 turbine at 2,400 cfs)
Reservoir
CreatesLake Travis
Power Station
Installed capacity108 MW

Mansfield Dam (formerly Marshall Ford Dam) is a dam located across a canyon at Marshall Ford on the Colorado River, 13 miles (21 km) northwest of Austin, Texas. The groundbreaking ceremony occurred on February 19, 1937, with United States Secretary of the Interior Harold L. Ickes attending. The dam was a joint project by the Lower Colorado River Authority (LCRA) and the United States Bureau of Reclamation, with partial funding provided by the Public Works Administration. Brown and Root, headed by James E. Walters, Sr., was the prime contractor.[1] The dam was completed in 1941. Originally called Marshall Ford Dam, the name was changed in 1941 in honor of United States Representative J.J. Mansfield. The reservoir behind Mansfield Dam is named Lake Travis. The dam is owned and operated by the LCRA.

The dedication at Mansfield Dam, August 2023

Mansfield Dam is 278 feet (85 m) high, 7,089 feet (2 km) long, and 213 feet (65 m) thick at the base. The concrete gravity dam with embankment wings and saddle dikes was designed to control flooding; to store 1.4 km3 (369 billion US gallons) of water; and to generate hydroelectric power (108 megawatts). The Spillway Elevation is 714 feet (218 m) above Mean Sea Level (MSL). LCRA begins to open floods gates when water reaches 681 feet above MSL. At 681 feet (208 m) above MSL, discharge capacity exceeds 130,000 cubic feet per second (3,700 m3/s) 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.[2]

Political History

[edit]

Lyndon B. Johnson ran for his first elected office as United States Representative 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.[3]

See also

[edit]


References

[edit]
  1. ^ "Guide to the Brown & Root / George R. Brown Executive Files, 1937-1978 MS 488". www.lib.utexas.edu. Retrieved 2017-03-22.
  2. ^ "Mansfield Dam Road (Formerly TX Ranch to Market Road 620) - Bridges and Tunnels". bridgestunnels.com. Retrieved 2022-06-08.
  3. ^ Caro, Robert (1982). The Years of Lyndon Johnson: The Path to Power. Alfred A. Knopf. pp. 648 and Chapters 20, 22, and 23. ISBN 978-0679729457.
[edit]
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