INTERRA was selected by Bowman Consulting to perform Geotechnical Investigation. The scope of the project included subsurface soil investigation, borings, laboratory services, and the completion of Structure Geotechnical Reports (SGR).

Tasks completed include the following:

  • IDOT, PTB 195-016 – WO 24, Box Culverts at IL 173 and IL 176, Lake County, IL, SGR
  • IDOT, PTB 195-016 – WO 23, Box Culvert at IL 60 over ditch, Lake County, IL, SGR
  • IDOT, PTB 195-016 – WO No. 22, IL 58 over Poplar Creek – Box Culvert, Cook County, IL SGR
  • IDOT, PTB 195-016 – IL 31 & Plum Street, Retaining Wall, South Elgin, IL SGR
  • IDOT, PTB 195-016 – Shoulder Improvements, US 41 at Mill Creek, Lake County, IL, SGR
  • IDOT, PTB 195-016 – WO No. 6, US 52 Box Culvert, Manhattan, Will County, IL, SGR
  • IDOT, PTB 195-016 – IL 83 at IL 38 Box Culvert and Retaining Wall, Oakbrook Terrace, IL, SGR