The Livermore Bridge is a bridge that carries US-431 over the Green River

Green River (Kentucky)

The Green River is a tributary of the Ohio River that rises in Lincoln County in south-central Kentucky. Tributaries of the Green River include the Barren River, the Nolin River, the Pond River and the Rough River...

, near Livermore

Livermore, Kentucky

Livermore is a city in McLean County in the U.S. state of Kentucky, at the confluence of the Green and Rough Rivers. The population was 1,482 at the 2000 census. It is included in the Owensboro, Kentucky Metropolitan Statistical Area...

 in McLean County, Kentucky

McLean County, Kentucky

McLean County is a county located in the U.S. state of Kentucky; its population was 9,938 in the 2000 Census. McLean County's county seat is at Calhoun....

 where it crosses over two rivers (the Green and Rough

Rough River

The Rough River is a tributary of the Green River in west-central Kentucky in the United States. Via the Green and Ohio rivers, it is part of the watershed of the Mississippi River...

 Rivers), and passes over a separate county; the only known such occurrence in the world. A sliver of land that is part of Ohio County, Kentucky

Ohio County, Kentucky

Ohio County is a county located in the U.S. state of Kentucky. As of 2000, the population was 22,916. Its county seat is Hartford. The county is named for the Ohio River, which originally formed its northern boundary. It is a dry county, which means that the sale of alcohol is restricted or...

 passes under the bridge. This was once printed in a Ripley's Believe It or Not strip, saying that people believe this makes the bridge the longest in the world. The bridge was dedicated on November 13, 1940.
The north end of the bridge starts at Livermore Kentucky. As it goes south, it first passes over the Rough River. It then goes over the peninsula

Peninsula

A peninsula is a piece of land that is bordered by water on three sides but connected to mainland. In many Germanic and Celtic languages and also in Baltic, Slavic and Hungarian, peninsulas are called "half-islands"....

 of Ohio County, then passes over the Green River, and then ends going downhill on the south bank of the Green River in McLean County. The Rough River feeds the Green River just west of the bridge.

The Livermore Bridge is a through truss bridge at 37°29'03" N, 87°08'05" W, whose largest span is 319.8 feet, to the total of 1,643.6 feet long, a deck width of 23.9 feet, and a vertical clearance above the deck of 17.7 feet. It was built by the Works Progress Administration

Works Progress Administration

The Works Progress Administration was the largest and most ambitious New Deal agency, employing millions of unskilled workers to carry out public works projects, including the construction of public buildings and roads, and operated large arts, drama, media, and literacy projects...

 of the Great Depression

Great Depression

The Great Depression was a severe worldwide economic depression in the decade preceding World War II. The timing of the Great Depression varied across nations, but in most countries it started in about 1929 and lasted until the late 1930s or early 1940s...

 era. An October 2004 inspection rated the road as very good, with its structure ranging from fair to good, but as a bridge from 1940 it is functionally obsolete.

An average of 6,833 cars a day use the bridge.

It is deemed eligible for the National Register of Historic Places

National Register of Historic Places

The National Register of Historic Places is the United States government's official list of districts, sites, buildings, structures, and objects deemed worthy of preservation...

, but has yet to receive that distinction.