Sonderen Street Extension

Sonderen Street Extension

Location: O'Fallon, Mo.

Client: Missouri Department of Transportation

In an effort to improve its arterial road system, the City of O'Fallon selected Burns & McDonnell to perform a broad scope of services, including the extension of Sonderen Street. The project extends Sonderen Street across I-70; with connections to Old Highway 40 on the south side of I-70 and the North Outer Road on the north side. Separate alignment studies for future extension and roadway relocations were included in the project.

The facilities include 3 miles of new and relocated roadways, a 500-foot-long bridge over I-70, multiple sections of retaining wall, and two signalized intersections. Extensive coordination was required with the MoDOT Disctrict 6 Office and Bridge Division, and the FHWA.

  • Location and alignment studies
  • Public involvement program
  • Roadway design
  • Bridge design