Proposed New Construction
Under current plans, a new three-lane bridge will be built downstream and parallel to the existing bridge between the Äppelallee and Gonsenheim interchanges. The Mombach interchange will likewise be connected. After the completion of the "New Schiersteiner Bridge", the old bridge will be demolished. Its pillars will remain and will support another three-lane bridge. The plans are required to include protection of the Mainz Sand Dunes nature reserve, an important source of food for the area’s white storks.
A design competition was held for the new bridge. In December 2007, it was announced that the competition was won by a joint-venture of the engineering firm Grontmij BGS and the architectural firm of Ferdinand Heide. The design calls for continuous partially arched box-section girders for the new 1285 m long bridge. According to plan, the first bridge would be completed by 2015 and the second by 2018. The project, including the new bridge and the expansion of the A 643 to six lanes to Mainz Triangle, is expected to cost 250 million euros.
Read more about this topic: Schierstein Bridge
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