T. Y. Lin International’s innovative Kanawha River Bridge is a record-setting segmental box girder structure built as part of the I-64 Widening Project in Kanawha County, West Virginia. The bridge carries I-64 eastbound traffic consisting of three through lanes, one auxiliary lane, and shoulders. The overall bridge length is 2,975-ft, including a record 760-ft main span, which is the longest box girder span in the U.S. The structure crosses over railroad tracks, the Kanawha River back channel, Wilson Island, the Kanawha River main channel, and three roads.
- T.Y. Lin International’s concrete design and a separate steel girder alternative were let to bid, with the concrete alternative garnering the lower bid at $82,864,247. The bid for the steel alternative was $112,910,000, more than $30,000,000 over the concrete bid.
- Longest box girder span in the U.S. at 760 feet.
- First long-span, segmental box girder structure to be built in West Virginia using the balanced cantilever method.
T.Y. Lin International was the prime consultant providing design and construction support services for the project. The design for the 760-ft.-long main span resulted from the need to locate the main piers outside the main channel of the Kanawha River in order to avoid interference with barge traffic. Since barges use the river regularly, the structure had to span the entire waterway in order to avoid obstructions to navigation. The continuous concrete box girder superstructure was chosen for the full length of the bridge. This allowed for longer approach spans, which reduced the bridge’s environmental and right-of-way impacts.
The 66-ft-wide bridge section is a slender single-cell, box girder with 1-ft, 6-in-thick webs; 16-ft-long cantilever overhangs and structural depth varying between 38 and 16 ft. This section is more slender and lighter than traditional concrete box designs and utilizes the construction materials to their full potential.
Bridge construction was completed ahead of schedule and structure was opened to traffic for the first time on July 31, 2010.
- Award of Merit, 2013
Post-Tensioning Institute (PTI)
- Award of Excellence, 2012
Portland Cement Association (PCA)
- National Recognition Award, 2011
American Council of Engineering Companies (ACEC)
- Bridge Award of Excellence, 2011
American Segmental Bridge Institute (ASBI)
- Grand Award, 2011
American Council of Engineering Companies of Metropolitan Washington (ACEC-MW)
- No. 1 in Top 10 Bridges List, 2009
Roads and Bridges
- Engineering Excellence Award for Large Bridges, 2007
West Virginia Division of Highways