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
Russky Bridge name. The bridge to Russky Island is the world's longest cable-stayed bridge, with a 1104 m long central span. The bridge also has the second highest pylons after the Millau Viaduct and the longest cable stays. The design of the bridge crossing has been determined on the basis of two primary factors: The piles were driven as deep as 77 m below ground and on the island side 120 auger piles were piled under each of the two 320 m high bridge towers. The pylons were concreted using custom self-climbing forms in pours of 4.5 m. A crane was used