INTERRA provided subsurface exploration, laboratory testing, and prepared Roadway Geotechnical Report (RGR) and Structure Geotechnical Reports (SGR). This project included the reconstruction/widening of Willow Road from Three Lakes Drive to Eden’s Expressway and reconstruction/widening of Eden’s Expressway from Winnetka Road to Willow Road. The scope included reconstruction of Chicago River Bridge between Willow Road, two box culverts near West Abutment of Chicago River Bridge, one retaining wall west of Chicago River Bridge and one retaining wall west of Wagner Road. Reconstruction of the bridge included the bridge deck and two abutments supported on steel H-Piles, Metal Shell Piles or Drilled Shafts.