Illinois Tollway project I-15-4235 included drainage improvements, construction improvements, mainline pavement, roadway and bridge reconstruction and widening, earth excavation, grading, and utility relocation and protection. The I-14-4188 project involved I-90, Roadway, Retaining Wall and Bridge Reconstruction and Widening, IL 53 to Arlington Heights Road and Construction Management Services. Illinois Tollway project I-14-4208 included design and construction of retaining wall outside the I-90 mainline pavement, roadway and bridge reconstruction and widening, earth excavation, and grading. For these three projects, INTERRA performed testing and inspection on concrete, soil, and asphalt in the field and at the plant. For asphalt quality assurance testing, including warm mix asphalt (WMA). Quality Assurance services were provided for grout and binder. For concrete, INTERRA tested and inspected barrier walls, cylinder strength, wall footings, slabs, drill shaft, and resistivity. INTERRA conducted soil compaction testing for wall and trench backfill. INTERRA also attended pre-pour meetings for the bridge deck and completed reporting for the project.