- Bridge bats from below
- Tourists waiting for the bats.
- The emergence of the bats
- The bridge bats have become an integral part of Austin's cultural identity.
Ann W. Richards Congress Avenue Bridge | |
---|---|
Coordinates | 30°15′41″N97°44′43″W / 30.26126°N 97.74531°W |
Carries | Motor vehicles, pedestrians, and bicycles |
Crosses | Lady Bird Lake |
Locale | Austin, Texas |
Official name | Ann W. Richards Congress Avenue Bridge |
Other name(s) | Congress Avenue Bridge South Congress Avenue Bridge |
Maintained by | City of Austin |
ID number | TXNBI 142270B00425007 |
Characteristics | |
Design | Arch bridge |
Material | Concrete |
Total length | 945.9 feet (288.3 m) |
Width | 60 feet (18 m) |
Longest span | 119.1 feet (36.3 m) |
History | |
Opened | April 4, 1910 |
Statistics | |
Toll | Free both ways |
Location | |
The Ann W. Richards Congress Avenue Bridge (formerly known simply as the Congress Avenue Bridge) crosses over Lady Bird Lake in Austin, Texas. Before construction of the Longhorn Dam was completed in 1960, the bridge crossed the Colorado River from which Lady Bird Lake is impounded. The bridge was known as the Congress Avenue Bridge from the construction of the first span across the Colorado River at that location in the late 19th century until November 16, 2006, when the Austin City Council renamed the current bridge in honor of Ann W. Richards, the 45th Governor of Texas and a long-term resident of Austin. The bridge is a concrete arch bridge with three southbound and three northbound vehicle lanes and sidewalks on both sides of the bridge.
The bridge currently serves as a habitat for the world's largest urban bat colony. This particular colony is a maternity colony, which means it provides a roosting place for pregnant female bats during the spring season. The females then raise their pups in this location from mid-summer to fall. Male bats are not present under the bridge until after the pups are born.
This section needs additional citations for verification .(January 2008) |
The first bridge across the Colorado River in this location was constructed in 1869 or 1871. The original structure was a pontoon toll bridge. In 1875, a new wooden toll bridge was constructed across the river. Bridge construction was finished at a cost of $80,000; an additional $20,000 was used to macadamize dykes across lowlands and a culvert over Bouldin Branch. On one occasion, a herd of cattle caused a span 50 feet above the water to give way. Only a few cattle were rescued.
On January 22, 1884, a modern iron bridge funded by private interests was opened at a cost of $74,000. There were sufficient spans to allow for the highest stage of overflow when the river flooded. The bridge was designed and built by engineer C. Q. Horton. The bridge was purchased by the Travis County Road and Bridge Co. and the City of Austin on June 18, 1886. By 1891, the Travis County Road and Bridge Co. refused to care for the bridge, and Travis County Commissioners negotiated an agreement whereby the City of Austin assumed complete control of the operation of the bridge. The city was forced to repair the bridge in 1892 and again in 1897, when the city paid half the cost for reflooring, a task that took until 1901 to complete. The bridge was repainted in 1902.
By 1908, traffic across the bridge had increased to the point where a new bridge was needed. Plans for a new concrete arch bridge were drawn as follows: "New Bridge: 910 FT Long iron bridge; 6 spans { 5-150FT Long, 1-160, 27 FT. Tall, 18 FT. Roadway, Bridge Piers are 45 FT. above ground. Will be built by King Bridge Co. of Cleveland, Ohio. Strength: 2,000 LBS per FT. – But was built four times as strong".[ citation needed ] The new bridge was opened on April 4, 1910, at a final cost of $208,950.10. Sections of the old iron bridge were later used in 1915 and 1922 to rebuild the bridge at nearby Moore's Crossing.
The bridge was rehabilitated in 1980. [1]
On November 16, 2006, the Austin City Council renamed the structure the Ann W. Richards Congress Avenue Bridge at its weekly meeting. [2] Richards was also a part-time Austin resident and former Travis County Commissioner.
Ann W. Richards Congress Avenue Bridge is home to the world's largest urban bat colony, which is composed of Mexican free-tailed bats. The bats reside beneath the road deck in gaps between the concrete component structures. They are migratory, spending their summers in Austin and the winters in Mexico. According to Bat Conservation International, [3] between 750,000 and 1.5 million bats reside underneath the bridge each summer.
In March 1986, Merlin Tuttle, founder of Bat Conservation International, resigned from his position as Curator of Mammals at the Milwaukee Public Museum in Wisconsin and relocated his fledgling conservation organization to Austin, which had been making national headline news for its urban bat population. [4] [5] At the time, the Congress Avenue Bridge bats were widely unpopular and the colony was at risk of extermination. [6] Tuttle's public education campaign to save the bats through dispelling myths and misconceptions about their threats to the citizens of Austin was met with widespread skepticism and earned him the 1986 Texas Monthly Bum Steer Award. [7] However, with help from a coalition of leaders in the Austin community, the Public Health Department, and news media, Tuttle's persistent education efforts successfully reversed public opinion about the bats and turned the Congress Avenue Bridge bat colony into the highly profitable tourist attraction for the city of Austin that it is today. [8]
The nightly emergence of the bats from underneath the bridge at dusk, and their flight across Lady Bird Lake primarily to the east, to feed themselves, attract as many as 100,000 tourists annually. [3] Tourists can see the bats from the bridge, from the sides of the river and from boats.
A study made in 1999 by Gail R. Ryser and Roxana Popovici concludes that the economic impact of the bats to Austin city is $7.9 million each year. Today, businesses are using the bats as a symbol for Austin.[ citation needed ]
A project, called "Bats and Bridges", has been put in place by the Texas Department of Transportation, in cooperation with BCI, to study the best way to make bridges habitable for bats. [9]
The Austin Ice Bats minor-league hockey team was named after the bridge's bats. [10]
The song "Bats" by Kimya Dawson and rapper Aesop Rock was inspired by the immense number of bats that reside under the bridge.[ citation needed ]
Ozzy Osbourne features the Congress bridge bats in his music video for Patient Number 9. [11]
Austin is the capital of the U.S. state of Texas and the seat and most populous city of Travis County, with portions extending into Hays and Williamson counties. Incorporated on December 27, 1839, it is the 26th-largest metropolitan area in the United States, the 11th-most populous city in the United States, the fourth-most populous city in the state after Houston, San Antonio, and Dallas, and the second-most populous state capital city after Phoenix, the capital of Arizona. It has been one of the fastest growing large cities in the United States since 2010. Downtown Austin and Downtown San Antonio are approximately 80 miles (129 km) apart, and both fall along the Interstate 35 corridor. This combined metropolitan region of San Antonio–Austin has approximately 5 million people. Austin is the southernmost state capital in the contiguous United States and is considered a Gamma + level global city as categorized by the Globalization and World Cities Research Network.
The Edwards Plateau is a geographic region forming the crossroads of Central, South and West Texas, United States. It is named in honor of Haden Edwards. It is bounded by the Balcones Fault to the south and east; the Llano Uplift and the Llano Estacado to the north; and the Pecos River and Chihuahuan Desert to the west. San Angelo, Austin, San Antonio and Del Rio roughly outline the area. The plateau, especially its southeast portion, is also known as the Texas Hill Country.
The Austin Ice Bats were a professional minor league ice hockey team based in Austin, Texas, from 1996 to 2008. They were originally members of the Western Professional Hockey League (WPHL) and later the Central Hockey League (CHL). The team was named for the Mexican free-tailed bats that nest under the Ann W. Richards Congress Avenue Bridge in the city.
The Llano River is a tributary of the Colorado River, about 105 miles (169 km) long, in Texas in the United States. It drains part of the Edwards Plateau in Texas Hill Country northwest of Austin.
The Mexican free-tailed bat or Brazilian free-tailed bat is a medium-sized bat native to North, Central, and South America and the Caribbean, so named because its tail can be almost half its total length and is not attached to its uropatagium. It has been claimed to have the fastest horizontal speed of any animal, reaching top ground speeds over 99 mph (160 km/h). It also flies the highest among bats, at altitudes around 3,300 m (10,800 ft).
Travis Heights is a historic neighborhood in south Austin, Texas, United States, bounded by Lady Bird Lake on the north, Interstate 35 on the east, Congress Avenue on the west and Oltorf Street on the south. These boundaries include Fairview Park, an earlier suburb associated with the same developers, running from the west side of Blunn Creek to South Congress Avenue. Part of Travis Heights was stranded east of Interstate 35; many of the same streets to be found west of the highway continue east of it.
Congress Avenue is a major thoroughfare in Austin, Texas. The street is a six-lane, tree lined avenue that cuts through the middle of the city from far south Austin and goes over Lady Bird Lake leading to the Texas State Capitol in the heart of Downtown.
Merlin Devere Tuttle is an American ecologist, conservationist, writer and wildlife photographer who has specialized in bat ecology, behavior, and conservation. He is credited with protecting the Austin Congress Avenue Bridge bat colony from extermination. Tuttle is currently active as founder and executive director of Merlin Tuttle's Bat Conservation (MTBC) in Austin, Texas.
Bracken Cave is a cave located in southern Comal County, Texas, outside the city of San Antonio. The 100-foot (30 m)-wide crescent shaped opening to the cave lies at the bottom of a sinkhole, formed when the roof of the cave collapsed. It is the summer home to the largest colony of bats in the world. An estimated 20 million Mexican free-tailed bats roost in the cave from March to October making it the largest known concentration of mammals.
After declaring its independence from Mexico in March, 1836, the Republic of Texas had numerous locations as its seat of government. This being seen as a problem attempts were made to select a permanent site for the capital. January, 1839, with Mirabeau B. Lamar as the newly elected president, a site selection commission of five commissioners was formed. Edward Burleson had surveyed the planned townsite of Waterloo, near the mouth of Shoal Creek on the Colorado River, in 1838; it was incorporated January 1839. By April of that year the site selection commission had selected Waterloo to be the new capital. A bill previously passed by Congress in May, 1838, specified that any site selected as the new capital would be named Austin, after the late Stephen F. Austin; hence Waterloo upon selection as the capital was renamed Austin. The first lots in Austin went on sale August 1839.
The Lamar Boulevard Bridge is a historic arch bridge carrying Texas State Highway Loop 343 over Lady Bird Lake in downtown Austin, Texas, United States. The bridge features six open-spandrel concrete arches spanning 659 feet (201 m) and carries tens of thousands of vehicles daily across the lake. Completed in 1942, the Lamar Boulevard Bridge was the second permanent bridge to cross the Colorado River, and one of the last Art Deco-style open-spandrel concrete arch bridges built in Texas. The bridge was named an Austin Landmark in 1993 and added to the National Register of Historic Places in 1994.
Loop 275 is a 9.454-mile (15.215 km), two-segment, state-maintained roadway located in Austin, Texas.
Moore's Crossing Historic District is a community located in rural Travis County nine miles southeast of Austin, Texas near the Austin–Bergstrom International Airport.
Downtown Austin is the central business district of Austin, Texas, United States. The area of the district is bound by Lamar Boulevard to the west, Martin Luther King Jr. Boulevard to the north, Interstate 35 to the east, and Lady Bird Lake to the south.
South Congress is a neighborhood located on South Congress Avenue in Austin, Texas, United States. It is also a nationally known shopping and cultural district known for its many eclectic small retailers, restaurants, music and art venues and, more recently, food trucks.
Bat Conservation International (BCI) is an international nongovernmental organization working to conserve bats and their habitats through conservation, education, and research efforts.
Travis County has had two locations named Montopolis. The first was during the Republic of Texas period north of the Colorado River. The second is today's Montopolis neighborhood in Austin, Texas south of the river. Located southeast of the city's urban core, today's neighborhood is in ZIP code 78741. Montopolis is bounded by Lake Lady Bird on the north, by Grove Street and the Pleasant Valley neighborhood on the west, to the south by Texas State Highway 71, and by U.S. Route 183 on the east. The southeast corner abuts Austin-Bergstrom International Airport. Montopolis is in City Council District 3.
The Montopolis Bridge is a historic Parker through truss bridge in Austin, Texas. It is located in the Montopolis neighborhood where a bicycle and pedestrian walkway crosses the Colorado River in southeastern Travis County. The bridge consists of five 200-foot Parker through truss spans and four 52-foot steel I-beam approach spans resting on reinforced concrete abutments. It was added to the National Register of Historic Places on October 10, 1996. The Montopolis Bridge sits at the best crossing of the Colorado River in the area with the historic crossing of the El Camino Real de los Tejas National Historic Trail just to the east.
South River City is a community located in Austin, Texas. Also frequently called Travis Heights, the neighborhood is located south of the city's urban core, just below Lake Lady Bird in South Austin. The area encompasses a portion of ZIP code 78704.
The 1928 Austin city plan was commissioned in 1927 by the City Council of Austin, Texas. It was developed by consulting firm Koch & Fowler, which presented the final proposal early the next year. The major recommendations of this city plan related to Austin's street plan, its zoning code, and the development of major industries and civic features, but it is most remembered for institutionalizing housing segregation by designating East Austin as the city's negro district.
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