ASPIRE is a quarterly magazine published by PCI in cooperation with the associations of the National Concrete Bridge Council. The editorial content focuses on the latest technology and key issues in the Concrete Bridge Industry.

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A record concrete box girder span over the Kanawha River will soon complete the widening of a 4.3-mile section of I-64 located in Kanawha County, West Virginia. T. Y. Lin International's bridge designers, working with the West Virginia Department of Transportation, Division of Highways (WVDOH), were confronted with the challenge of creating a low-cost, durable, and aesthetically pleasing structure that would alleviate traffic congestion for commuters in the Charleston area. The resulting eight-span segmental bridge design is the first long-span segmental box girder structure built by the balanced cantilever method in West Virginia. profile KANAWHA RIVER BRIDGE / KANAWHA COUNTY, WEST VIRGINIA ENGINEER: T.Y. Lin International, Alexandria, Va. GEOTECHNICAL ENGINEER: Triad Engineering Inc., St. Albans, W. Va. PRIME CONTRACTOR: Brayman Construction Corporation, Saxonburg, Pa. CONSTRUCTION ENGINEERS: Finley Engineering Group Inc., Tallahassee, Fla., and Michael Baker Corporation, Charleston, W. Va. CONCRETE SUPPLIER: Arrow Concrete, Winfield, W. Va. FORMwORk SUPPLIER: DOKA, USA Ltd., Baltimore, Md. AWARDS: 2007 West Virginia Division of Highways Engineering Excellence Award in the Large Bridge Category The existing I-64 bridge over the Kanawha River between Dunbar and South Charleston is a steel plate girder structure with a 440-ft-long main span that was completed in 1974 to carry four lanes of traffic. The preliminary d e s i g n s t u d i e s e v a l u a t e d s e v e r a l alternatives for increasing the capacity of the existing Kanawha River Bridge to six lanes, including widening the existing bridge, complete bridge replacement, and construction of a new eastbound bridge. The alternative selected was the construction of a new eastbound structure on an improved nonparallel alignment carrying three travel lanes and one auxiliary lane. The existing bridge will be modified to maintain four lanes of westbound traffic. by Santiago Rodriguez, T.Y. Lin International A rECOrd sEGMEnTAl sPAn KANAWHA RIVER BRIDGE The Kanawha River Bridge shown in this rendering has the record span in the United States for a concrete box girder at 760 ft. All photos and renderings: T.Y. Lin International. A 760-ft-long main span is the longest concrete box girder span in the United States. 30 | ASPIRE , Winter 2009

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