Contract Awarded for $1.5B Expansion of I-35 in San Antonio

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i35 in texas map
A map of the I-35 Northeast Expansion Project
Texas Department of Transportation

Construction is expected to start next year on a $1.5 billion project to improve a Texas section of Interstate 35, which is part of a major trade route between Mexico and Canada.

A partnership of Ferrovial Construction U.S. and Webber recently won the design-build contract from the Texas Department of Transportation for the Interstate 35 Northeast Expansion for San Antonio and surrounding areas. The six-year project involves building 18 miles of additional elevated main lanes, as well as 9.5 miles of non-tolled improvements along I-35. Along with San Antonio, the project will reach Live Oak, Selma and Schertz.

Highlights of the project:

  • Building elevated managed lanes between the existing main lanes and frontage roads and bridges. TxDOT says this will add one HOV lane and two general purpose lanes in each direction to connect I-410 South, I-410 North, Loop 1604 West, and Loop 1604 East.
  • Reconstructing and widening Loop 1604 general purpose lanes and bridges.  
  • Constructing more than 800 bridge spans, using an estimated 4,500 concrete beams, 31 million pounds of steel girders and 6 million square feet of bridge deck.

I-35 extends from Laredo, Texas, near the Mexican border to Duluth, Minnesota.