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 watershed that encompasses parts of seven U.S. s ...

Austin, Texas Austin is the capital city of the U.S. state of Texas, as well as the seat and largest city of Travis County, with portions extending into Hays and Williamson counties. Incorporated on December 27, 1839, it is the 11th-most-populous city ...

. The reservoir was formed in 1939 by the construction of Tom Miller Dam by the Lower Colorado River Authority. 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'

; 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 ba ...

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 pl ...

. 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, Lake LBJ,

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, bu ...

. 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

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-Russi ...

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