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.
Issue link: http://www.aspiremagazinebyengineers.com/i/697527
The new Dresbach Bridge, which carries Interstate 90 (I-90) over the Mississippi River, is a highly utilized river crossing that serves as a gateway for regional and interstate needs and is an enhanced local connection for the adjacent communities. The replacement bridge connecting La Crescent, Minn., and La Crosse, W is., addresses a significant Minnesota Department of Transportation (MnDOT) need and brings greater mobility to the area. The Dresbach Bridge is designed to exceed current structural standards and greatly improve roadway geometry on this important regional corridor. Bi-directional precompression of the superstructure from high-strength post- tensioning steel, high-performance c o n c r e t e , s t a i n l e s s s t e e l d e c k reinforcement, and integral wearing surfaces on all spans provide MnDOT with a highly durable bridge for long- term performance and far less future maintenance cost. Combined with the concurrent reconstruction of the adjacent Trunk Highway 61 (TH61)/I-90 interchange, the overall project improves safety, capacity, and access while replacing the outdated highway system with a long-life facility for MnDOT and the traveling public. Aesthetically, the bridge serves as a beautiful companion to the pristine waters and recreational facilities of the Mississippi River. Located within the Upper Mississippi River National Wildlife and Fish Refuge, the Dresbach Bridge serves as a model for how a grand bridge structure can be developed with the community to exist harmoniously profile DRESBACH BRIDGE / NEAR DRESBACH, MINNESOTA BRIDGE DESIGN ENGINEER: FIGG, Denver, Colo. CONSTRUCTION INSPECTION: WSB, Minneapolis, Minn. PRIME CONTRACTOR: Ames Construction, Burnsville, Minn. PRECASTER: County Materials Corporation, Janesville, Wis.—a PCI-certified producer POST-TENSIONING CONTRACTOR: Schwager Davis Inc., San Jose, Calif. Dual 508-ft-long spans over the main channel of the Mississippi River result in large navigational and recreational openings, and only one pier in the river that is away from the bank. All photos: FIGG. May 2016 view of the completed segmental main channel bridge looking east. The 1667-ft-long bridge was built from the above over the main channel of the Mississippi River. D l 5 0 8 d l 8 - f t - l o n g s p a n s o v e r t h e m a i n c h a n n e l o f t h e M i s s i s s i p p i R i v e r r e s u l t i n l a r g e n a v i g a t i o n a l a n d r e c r e a t i o n a l o p e n i n g t h e r i v e r t h a t i s a w a y f r o m t h e b a n k . A l l p h o t o s : F I G G . 8 f l h i h l f h M i i i i R i l i l i i l d i l i by Eric Breitsprecher, Minnesota Department of Transportation, and Courtney C. Oltman, Stephen E. Fultz, and John R. Dvorak, FIGG The Dresbach Bridge A bridge springs forth from nature 14 | ASPIRE Summer 2016 P R O J E C T