Originally built in 1965, the I-84 viaduct in Hartford, CT, is an eight-bridge structure that runs between exits 45 and 33, merging with I-91. The existing structure is serving three times its traffic capacity, creating significant wear and tear for the roadway. To help bolster the viaduct’s long-term efficiency, the Connecticut Department of Transportation (CTDOT) contracted with STV to provide construction engineering inspection services as part of a $40 million rehabilitation project.

Rehabilitation efforts for the viaduct included structural steel beam end repairs, diaphragm replacements, abrasive blasting of existing lead-based coatings, painting of beam ends, and bearing replacements. Concrete repair work included partial and full depth deck patching, header repairs, partial deck replacements, and extensive concrete repairs to existing piers and abutments requiring beam jacking and temporary shoring. New bridge deck joints were installed along with milling and bituminous paving. Safety improvements consisted of concrete barrier modifications throughout the viaduct, modified roadside barrier and attenuation systems, illumination, line striping, and traffic monitoring systems.