Illinois Tollway Bridge Construction O’Hare to Westbound IL RT 390 Ramp at I-490 and IL RT 390 Interchange
Cotter is providing Assistant Resident Engineer services to the Illinois Highway Tollway Authority for the O’Hare to Westbound Rt. 90 Ramp at the I-490 and Rt. 390 interchange. This $8 million bridge construction project along I-490 requires the construction of the bridge carrying Ramp Q1 (Westbound ramp from O’Hare to Illinois Route 390) over Ramps 04 (Westbound ramp from Northbound I-490 to Supreme Drive) and Ramps P1/O8 (Westbound ramp from Southbound I-490 to Westbound Illinois Route 390 and Supreme Drive). Work also includes the construction of a retaining wall, as well as extensive earthwork and grading for Ramp Q1, construction of storm sewer, erosion and sediment control, and traffic control and protection.