As a temporary fix, workers are erecting steel-truss support towers under the sagging Leo Frigo Bridge on Interstate 43 in Green Bay, Wis., and lateral supports at the top of the damaged pier as investigators continue their examination of the 8,000-ft structure.
Lunda Construction Co. of Black River Falls, Wis., started work Oct. 14 to put up two pairs of support towers on each side of Pier 22 and 55 ft away from its base. The pier sank 2.5 ft in late September and early October, prompting the Wisconsin Dept. of Transportation to shut down the bridge (ENR 10/14 p.22).