CBBEL was part of the Stantec Engineering team selected by IDOT and prepared the Phase I Environmental Assessment (EA). The Federal Highway Administration (FHWA) issued a Finding of No Significant Impact (FONSI) on July 20, 2016. CBBEL’s Phase I drainage engineering services included preparing Hydraulic Reports for 3 floodplain/floodway waterway crossings. In addition, CBBEL prepared a Hydraulic Report for Pump Station 30. The existing pump station and trunk sewer system do not provide sufficient roadway freeboard (edge of pavement protection) to meet current IDOT standards. CBBEL analyzed several storm sewer and pump station upgrade alternatives for hydraulic operation, cost, and constructability to provide support for the selected improvement project.

The Details


DuPage & Cook Counties, Illinois

Construction Cost/Fee

$420 million / $760 thousand


IDOT/Stantec Engineering