Tarn (river) a mean flow of approximately . The Millau Viaduct spans the valley of the Tarn near Millau, and is now one of the area's most popular attractions. The tributaries of the Tarn include: The Tarn separates the Narbonne and Aquitaine basins. The Tarn passes through the following departments and towns: The Millau Viaduct, the tallest bridge in the world, carrying the A75 autoroute across the Tarn Gorge near Millau, opened in December 2004. The Tarn is famous for its brutal floodings, which are the most dangerous in Europe along with the Danube. The flooding of March 1930 saw the Tarn
San Joaquin River Viaduct San Joaquin River Viaduct The San Joaquin River Viaduct is a bridge currently under construction to carry California High-Speed Rail over the San Joaquin River. Most of the bridge is in the city of Fresno, California in Fresno County, although the portion north of the river will be in Madera County. It is the second major river crossing to be constructed as part of California High-Speed Rail, after the Fresno River Viaduct to the north. The bridge will be long, and combines a double concrete arch span crossing the river with a pergola structure to carry the tracks laterally over