Lake Austin, formerly Lake McDonald, is a water
reservoir
A reservoir (; from French ''réservoir'' ) is an enlarged lake behind a dam. Such a dam may be either artificial, built to store fresh water or it may be a natural formation.
Reservoirs can be created in a number of ways, including contro ...
on the
Colorado River
The Colorado River ( es, Río Colorado) is one of the principal rivers (along with the Rio Grande) in the Southwestern United States and northern Mexico. The river drains an expansive, arid drainage basin, watershed that encompasses parts of ...
in
Austin, Texas
Austin is the capital city of the U.S. state of Texas, as well as the county seat, seat and largest city of Travis County, Texas, Travis County, with portions extending into Hays County, Texas, Hays and Williamson County, Texas, Williamson co ...
. The reservoir was formed in 1939 by the construction of
Tom Miller Dam
Tom Miller Dam is a dam located on the Colorado River within the city limits of Austin, Texas, United States. The City of Austin, aided by funds from the Public Works Administration, constructed the dam for the purpose of flood control and for ge ...
by the
Lower Colorado River Authority
The Lower Colorado River Authority (LCRA) is a nonprofit public utility created in November 1934 by the Texas Legislature. LCRA's mission is to enhance the lives of the Texans it serves through water stewardship, energy and community service. LC ...
. Lake Austin is one of the seven
Highland Lakes created by the LCRA, and is used for
flood control
Flood control methods are used to reduce or prevent the detrimental effects of flood waters."Flood Control", MSN Encarta, 2008 (see below: Further reading). Flood relief methods are used to reduce the effects of flood waters or high water level ...
,
electrical power generation, and recreation.
Hydrology
Lake Austin is a part of Texas'
Colorado River
The Colorado River ( es, Río Colorado) is one of the principal rivers (along with the Rio Grande) in the Southwestern United States and northern Mexico. The river drains an expansive, arid drainage basin, watershed that encompasses parts of ...
; it begins below
Mansfield Dam and is principally fed by the outflow of
Lake Travis
Lake Travis is a reservoir on the Colorado River in central Texas in the United States.
Serving principally as a flood-control reservoir, Lake Travis' historical minimum to maximum water height change is nearly 100 feet. In 2018 alone, it saw ...
. The lake
meander
A meander is one of a series of regular sinuous curves in the channel of a river or other watercourse. It is produced as a watercourse erodes the sediments of an outer, concave bank ( cut bank) and deposits sediments on an inner, convex bank ...
s generally from northwest to southeast, with few significant
tributaries
A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainag ...
; the largest are
Bull Creek, entering from the north near where
Loop 360 spans the lake at the
Pennybacker Bridge
The Percy V. Pennybacker Jr. Bridge in Austin, Texas, is a through-arch bridge across Lake Austin which connects the northern and southern sections of the Loop 360 highway, also known as the "Capital of Texas Highway." The road is widely consid ...
, and Bee Creek, entering from the west just above Tom Miller Dam, where the lake ends. Its outflow through Tom Miller Dam then becomes the principal inflow for
Lady Bird Lake
Lady Bird Lake (formerly, and still colloquially referred to as Town Lake) is a river-like reservoir on the Colorado River in Austin, Texas, United States. The City of Austin created the reservoir in 1960 as a cooling pond for a new city power p ...
.
Lake Austin is maintained as a
constant-level lake by releases of water from Lake Travis upstream. The other
Highland Lake reservoirs on the Colorado River are
Lake Buchanan,
Inks Lake
Inks Lake is a reservoir on the Colorado River in the Texas Hill Country in the United States. The reservoir was formed in 1938 by the construction of Inks Dam by the Lower Colorado River Authority. Located near Burnet, Texas, the lake serves ...
,
Lake LBJ
Lake Lyndon B. Johnson (more commonly referred to as Lake LBJ and originally named Lake Granite Shoals) is a reservoir on the Colorado River in the Texas Hill Country about 45 miles northwest of Austin. The reservoir was formed in 1950 by the co ...
,
Lake Marble Falls
Lake Marble Falls is a reservoir on the Colorado River in the Texas Hill Country in the United States. The reservoir was formed in 1951 by the construction of Max Starcke Dam by the Lower Colorado River Authority. Originally named Marble Falls Da ...
, and Lake Travis upstream, and Lady Bird Lake downstream.
History
The first lake on the same site was named Lake McDonald, a reservoir formed by the construction of Austin Dam between 1890 and 1893. In 1900 a heavy rainstorm
overwhelmed and destroyed the first Austin Dam, causing extensive flooding. The dam began to be rebuilt in 1915, but repairs were abandoned because of a contract dispute, and the unfinished dam was again destroyed in a heavy storm later that year. In 1938 the Lower Colorado River Authority began building the Tom Miller Dam; the dam was completed and the lake filled in 1939.
Recreational uses
Lake Austin is a popular fishing and boating destination.
Boating
Numerous companies rent out sailboats, motorboats, canoes, pontoon boats, and large party boats in the Austin area.
The Austin Parks and Recreation Department offers classes in canoeing, kayaking, and sailing.
Fish and wildlife populations
Lake Austin has been stocked with several species of fish intended to improve the utility of the reservoir for recreational fishing. The lake is considered to have an excellent stock of
largemouth bass
The largemouth bass (''Micropterus salmoides'') is a carnivorous freshwater gamefish in the Centrarchidae ( sunfish) family, a species of black bass native to the eastern and central United States, southeastern Canada and northern Mexico, but ...
.
Other fish present include
catfish
Catfish (or catfishes; order Siluriformes or Nematognathi) are a diverse group of ray-finned fish. Named for their prominent barbels, which resemble a cat's whiskers, catfish range in size and behavior from the three largest species alive, ...
and
sunfish.
Lake Austin is one of the Texas Highland Lakes infested with
hydrilla
''Hydrilla'' (waterthyme) is a genus of aquatic plant, usually treated as containing just one species, ''Hydrilla verticillata'', though some botanists divide it into several species. It is native to the cool and warm waters of the Old World in A ...
, a non-native aquatic plant species. The Lower Colorado River Authority has intentionally lowered the water levels in the lake in the months of January and February so that freezing air temperatures might destroy substantial portions of the
hydrilla
''Hydrilla'' (waterthyme) is a genus of aquatic plant, usually treated as containing just one species, ''Hydrilla verticillata'', though some botanists divide it into several species. It is native to the cool and warm waters of the Old World in A ...
in the lake each winter. As of March 2014, hydrilla has been completely eliminated from the lake through the stocking of Asian
grass carp
The grass carp (''Ctenopharyngodon idella'') is a species of large herbivorous freshwater fish in the family Cyprinidae, native to the Pacific Far East, with a native range stretching from northern Vietnam to the Amur River on the Sino-Russian ...
by the City of Austin. As of September 2016 the grass carp released into Lake Austin have begun to devastate the lake’s natural resources. This has led to a decline in the wildlife native to this section of the Colorado River.
References
External links
*
{{DEFAULTSORT:Austin, Lake
Reservoirs in Texas
Geography of Austin, Texas
Protected areas of Travis County, Texas
Bodies of water of Travis County, Texas
1939 establishments in Texas
Lower Colorado River Authority