Features
By Patrick Cassity, P.E.
The engineers hired to replace a bridge over Biloxi Bay after it was destroyed by Hurricane Katrina faced a daunting task: ensuring that one lane of the new bridge would be open in each direction in just 18 months and that the entire bridge, which was to carry three lanes in each direction, would be open in less than two years. Using carefully designed structural elements that could be easily manufactured and the design/build delivery method, they beat the initial deadline by two months.
By Danita S. Boettner, P.E., Don Koci, P.G., Darren L. Brown, P.G., and Bruce Allman, P.E.
In Hutchinson, Kansas, engineers not only remediated soil and groundwater contaminated with carbon tetrachloride but also designed an injection well and a reverse-osmosis treatment system that will make it possible to blend the treated groundwater with the city’s well water for reuse.
By Tarek Ayoubi, P.E., Andrew Stoebner, P.E., and Kenneth Byle, P.E.
The 63,000-seat Lucas Oil Stadium, in Indianapolis, a multiuse structure that serves primarily as the home of the National Football League’s Indianapolis Colts franchise, features a traditional brick-clad, gabled roof design but with numerous modern twists. Chief among its innovations are the first retractable roof in the National Football League that opens toward the sidelines and a massive operable window at the building’s northern end that offers stunning views of downtown Indianapolis.
By Walter E. Kaeck, P.E., M.ASCE, Frederick C. Rhyner, P.E., M.ASCE, Hugh S. Lacy, P.E., F.ASCE, and Michael Quasarano, A.M.ASCE
After a caisson experienced unexpected settlement during construction of a new lift span on a railroad bridge crossing the Thames River in Connecticut, a remedial grouting program was implemented to place significant quantities of grout at a target zone about 130 to 170 ft (40 to 52 m) below the river surface. Ultimately, the effort succeeded in stopping the movement, in large part because of a computerized data acquisition system for instantaneous monitoring and evaluation of the grout injection program.
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