While replacing the existing 15-ft-long concrete slab bridge for this $7.2-million project, the team faced challenges that included compressible soils and tidal conditions. Because a sealed cofferdam was not employed, all work was conducted during 8-ft tidal cycles.
After hosting numerous memorable sporting events during its 40-year history, the Carrier Dome achieved a landmark of its own with the replacement of its original air-supported roof—the last of its kind in the U.S.
For more than 90 years, the old Royal Hawaiian Groin had helped protect Waikiki Beach in Honolulu, but its deteriorating condition required quick action.
To remove and replace seven 50-year-old, oil-filled cables under Lake Champlain that connect terminals in Plattsburgh, N.Y., and Grand Isle, Vt., was a delicate, difficult project.
Replacing a structurally deficient bridge in a remote corner of the north central Arizona wilderness challenged engineers and crews who used the older bridge to help build the new structure, employed close-proximity blasting and custom-crafted access for cranes and other heavy machinery.
