I-390 Improvements at I-490 - Bridge Design and Interchange Improvements

Our Projects

The New York State Department of Transportation selected Cold Spring Construction Co., along with Erdman Anthony as lead design engineer, for the third and fourth stages of the I-390 interchange improvements at I-490 design-build project in Gates, New York. The project includes four new bridges, new embankment for a new I-390 express southbound alignment, rehabilitation of the existing I-390 southbound pavement, rehabilitation of the I-490 pavement within the interchange, enhanced expressway lighting, traffic signal design, new noise walls, and reconstruction of a portion of Lyell Avenue.

Three of the new bridges will carry the new I-390 southbound over I-490 and associated ramps. The I-390 southbound bridge over I-490 eastbound, Ramp ES, and Ramp NE is a 525-foot-long, three-span structure. The superstructure is a concrete deck on curved, continuous steel multigirders. The two I-390 southbound bridges over I-490 westbound, Ramp SW, and Ramp WN are both 400-foot-long continuous two-span steel multigirder structures. All of the bridges have jointless configurations to minimize future deterioration of other bridge elements, such as bearings and substructures.

Substructures that support the three-span bridge consist of fully integral abutments surrounded by cast-in-place reinforced concrete surround walls and piers. Cast-in-place reinforced concrete abutments and piers support the twin two-span bridges. Abutments and piers that support the superstructures are either founded on steel H-piles or spread on bedrock.

Independent wingwalls and surround walls have foundations that are spread on earth, except for the substructures between the consecutive two-span bridges. Those substructures consist of abutments and 50-foot-long by 50-foot-tall U-type walls that all have a common footing supported on steel H-piles. Backfill inside the boxlike structure consists of controlled low-strength material to minimize lateral earth pressure and clean stone fill for constructability purposes.

Christopher Sichak, PE
Christopher Sichak, PE
 (585) 427-8888 x 1088