Onion Creek is a small

tributary 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 drainage ...

stream A stream is a continuous body of water, body of surface water Current (stream), flowing within the stream bed, bed and bank (geography), banks of a channel (geography), channel. Depending on its location or certain characteristics, a stream ...

of 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 ...

Texas Texas (, ; Spanish language, Spanish: ''Texas'', ''Tejas'') is a state in the South Central United States, South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2 ...

. It begins southeast of Johnson City,

Blanco County, Texas Blanco County (Spanish: "white", ) is a United States county located in the U.S. state of Texas. It is located in Central Texas and its county seat is Johnson City. As of the 2020 census, the population was 11,374. The county is named for ...

, and flows approximately eastward into the Colorado River, northwest of

Garfield ''Garfield'' is an American comic strip created by Jim Davis. Originally published locally as ''Jon'' in 1976, then in nationwide syndication from 1978 as ''Garfield'', it chronicles the life of the title character Garfield the cat, his human ...

Travis County, Texas Travis County is located in south central Texas. As of the 2020 census, the population was 1,290,188. It is the fifth-most populous county in Texas. Its county seat is Austin, the capital of Texas. The county was established in 1840 and is na ...

. While areas surrounding the creek's origin in Blanco County are primarily rural, areas closer to its mouth in Travis County have more urban and industrial development. Passing near Dripping Springs,

Driftwood __NOTOC__ Driftwood is wood that has been washed onto a shore or beach of a sea, lake, or river by the action of winds, tides or waves. In some waterfront areas, driftwood is a major nuisance. However, the driftwood provides shelter and fo ...

, and Onion Creek, Onion Creek is the source of the

waterfall A waterfall is a point in a river or stream where water flows over a vertical drop or a series of steep drops. Waterfalls also occur where meltwater drops over the edge of a tabular iceberg or ice shelf. Waterfalls can be formed in several wa ...

s in

McKinney Falls State Park McKinney Falls State Park is a state park in Austin, Texas, United States at the confluence of Onion Creek and Williamson Creek. It is administered by the Texas Parks and Wildlife Department. The park opened on April 15, 1976 and is named after ...

. Onion Creek's

watershed Watershed is a hydrological term, which has been adopted in other fields in a more or less figurative sense. It may refer to: Hydrology * Drainage divide, the line that separates neighbouring drainage basins * Drainage basin, called a "watershe ...

spans an area of .

2013 Flood

On October 31, 2013 Onion Creek experienced historic levels of flooding, cresting at 40.15 ft, a level not seen since 1921. Over the course of 4h 9-10in of rain fell in the Onion Creek watershed. The flood had a flow rate of over 120,000 cubic feet per second, more than twice that of

Niagara Falls Niagara Falls () is a group of three waterfalls at the southern end of Niagara Gorge, spanning the border between the province of Ontario in Canada and the state of New York in the United States. The largest of the three is Horseshoe Falls, ...

. In the end, five people died and more than 500 homes were damaged by flood waters. As a result of the flood the

City of Austin 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 ...

purchased hundreds of homes in the floodplain. These properties have formed the northern section of the Onion Creek Metropolitan Park since 2019.Onion Creek Metropolitan Park
/ref>

References

*
USGS Geographic Names Information Service
*USGS Hydrologic Unit Map - State of Texas (1974)

External links

Rivers of Texas Tributaries of the Colorado River (Texas) Rivers of Blanco County, Texas Rivers of Travis County, Texas Geography of Austin, Texas {{Texas-river-stub

2013 Flood

See also

References

External links