SQN is the prime consultant providing on-call Phase III construction engineering services for IDOT District One, managing multiple concurrent roadway and bridge projects while overseeing construction inspection, contract administration, and compliance with IDOT standards. Tasks have included reconstruction of the US 12/20/45 and IL 171 interchange, including bridge replacement, storm sewer improvements, retaining walls, pavement reconstruction, and lighting installation.
Sine Qua Non | Absolutely Essential