Bridges of Mower County (I-90)

Bridges of Mower County (I-90)


Project Challenge

Due to deterioration and obsolescent design, five bridges in Mower County on Interstate 90 near Austin, Minnesota, are required to be replaced.  Some bridges required larger waterway openings and others required higher elevations to meet bridge clearance.  Four bridges span waterways (Turtle Creek and Dobbins Creek), and one flyover bridge crosses a roadway.  The project, started in July 2009, is required to be completed by fall of 2010 using the Design-Build delivery method.

Rani Engineering Solution

  • Topographic surveying of in-place features
  • Digitally modeling terrain for design
  • Analyzing waterway for bridge opening
  • Preparing risk assessment and best management practices (BMPs)
  • Preparing erosion & sedimentation control plan
  • Contributing to Design-Build delivery method