High Bridge is a currently used railroad bridge
linking the steep palisades on either side of the
Kentucky River between Jessamine County, Kentucky
and Mercer County, Kentucky. Constructed in 1876,
it is a three-span continuous under-deck truss used
by Norfolk Southern Railway to carry trains between
Lexington, Kentucky and Harrodsburg, Kentucky. It is
a National Civil Engineering Landmark.The bridge was
redesigned of cantilever design and opened in 1877 on
the Cincinnati Southern Railway. It was 275 feet tall
and 1,125 feet long: the tallest bridge above a navigable
waterway in North America and the tallest railroad bridge
in the world until the early 20th century. It was designed
by Charles Shaler Smith and was the first cantilever bridge
in the United States. In 1879 President Hayes and Gen.William
Tecumseh Sherman attended the dedication. The current bridge,
designed by Gustav Lindenthal, was built around the existing
structure in 1911 and expanded to two tracks in 1929.
(From Wickipedia.)