In November 2002, the Massachusetts Highway Department awarded J. F. White Contracting Company a $48 million contract to demolish a portion of the existing I-93 northbound/southbound structure and to construct a new on ramp from Boston's historic North End to I-93 northbound.
The contract featured the construction of fourteen (14) spans of precast post-tensioned concrete segmental viaduct and two (2) spans of cast-in-place post-tensioned viaduct; the placement of high performance concrete; the installation of eleven (11) - 8' and 6' diameter drilled shafts; and the placement of ten (10) - 7'-3" diameter cast-in-place columns, which varied in height from fifty (50) feet to seventy (70) feet.
The project also entailed demolition and proper removal (including lead paint) of the existing I-93 northbound/southbound viaduct structure (including the truss over the Charles River) from Bent 2 to Bent 24. Construction of wetland mitigation sites, signage, fire protection systems and the excavation, transportation and disposal of contaminated soils were also involved.