I29 & Tea Interchange

In early 2005 the SDDOT let the reconstruction of the I-29 and Lincoln Cty Rd 106 intersection.  The existing configuration was a traditional diamond interchange with Cty Rd 106 going over I-29.  The new designed called for a single point interchange with I-29 going over Lincoln Cty Rd106.  During construction I-29 traffic was detoured around the site by using the existing on and off ramps of the north bound lanes. The county road was closed and detoured.  Through this section of I-29 the ADT (Average Daily Traffic) is around 27,000.

Each bridge was a single span steel girder superstructure, 208 feet long, and 40 feet wide.  Each bridge contains 1,600 linear feet of H-Pile, 72,000 lbs of reinforcing steel, 340 cubic yards of concrete and 466,000 Lbs of Structural Steel.  Additional piling was driven for future widening of the structures to accommodate a 3rd lane each way.

The project included furnishing and installing 30,000 square feet of large panel MSE Wall. It also received the 2005 South Dakota Transportation Quality Award for Structures Construction



  • South Dakota Department of Transportation


  • Tea, SD


  • 8 Months


  • Heavy/Highway and Civil


  • SFC Civil Constructors


  • Bridge Subcontractor