Ann W. Richards Congress Avenue Bridge was created in 1910.
Not sure if this is what you're after, but the Ann W. Richards Congress Avenue Bridge is home to the world's largest urban bat colony, with 1.5 million bats.
Richards Covered Bridge was created in 1852.
Girard Avenue Bridge was created in 1874.
Laurier Avenue Bridge was created in 1900.
Michigan Avenue Bridge was created in 1920.
Victoria Avenue Bridge was created in 1890.
Perry Avenue Bridge was created in 1899.
Mary Avenue Bridge was created in 2008.
Almonaster Avenue Bridge was created in 1919.
Franklin Avenue Bridge was created in 1923.
Florida Avenue Bridge was created in 2005.
First Avenue Bridge was created in 1920.