This IDOT project ( 60P42, 60R30, 60R31, 60I31) involved total reconstruction of the interchange. This became the first Diamond Interchange in Illinois. INTERRA performed QA testing and inspection of materials for PCC, HMA, and Soils. INTERRA reported to client and performed plant and field inspections on asphalt and concrete. Other services provided included density testing on soils and aggregates in addition to proof roll and static cone testing.