Millau Viaduct mid-1998. After undergoing wind tunnel tests, the shape of the road deck was altered, and detailed corrections were made to the design of the pylons. When the details were eventually finalised, the whole design was approved in late 1998. Once the Ministry of Public Works had taken the decision to offer the construction and operation of the viaduct as a grant of contract, an international call for tenders was issued in 1999. Five consortia tendered: Piers were built with Lafarge high performance cement. The pylons of the Millau Viaduct, which are the tallest elements (the tallest pylon – ) were
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