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The Illinois Tollway is rebuilding and widening the North Tri-State Tollway
(I-294/I-94) throughout a 39-mile corridor in order to provide congestion
relief. The project includes reconstructing and widening to four lanes in each
direction of the North Tri-State Tollway between Dempster Street and IL Route
173 and reconstructing the less congested section north of IL Route 173 to
Russell Road . The section between Russell Road and the Wisconsin state line
will be resurfaced. This work is part of the Tollway's Congestion-Relief Program
to reduce travel times.
Specific tasks being performed by GLSEC engineers and technicians include...
Monitoring Quality Control Procedures and Reporting to Tollway Authority.
Assuring overall quality of Soils & Aggregate materials.
Monitoring Subgrade Testing by contractors.
Proofrolling Observation and Static/Dynamic Cone Testing on subgrade soils.
Monitoring PGE Crushing and Placement Operations.
Compaction Testing of Embankments, Backfill and MSE Walls.
Quality Assurance Testing of Concrete and Hot-Mix-Asphalt.
Laboratory Testing of Concrete Cylinders, Aggregates and Hot-Mix Asphalt.
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