SR 202 Red Mountain Widening I-10 to SR 101

  • Location:

    Phoenix, Arizona

  • Client:

    Arizona Department of Transportation

  • Construction Value:


  • Delivery Method:


  • Year Completed:


  • Specialties:

    Bridges, Roadways

Features & Highlights

  • Project team completed work eight months earlier than anticipated schedule
  • Maintained continuous flow of traffic during construction through use of lane closures and phased construction
Project Overview

Sundt and a joint venture partner widened 10 miles of the Loop 202 freeway that runs through Phoenix and Tempe. The Arizona Department of Transportation project improved traffic flow by adding general purpose lanes along 10 miles of the freeway’s eastbound side and approximately 2 miles along the westbound side. Twenty-two bridges were widened as part of the project, including a mile-long bridge that spans the Salt River, which Sundt originally constructed in the 1990s.

The widening of the existing bridge over the Salt River required temporary fill to be placed across the channel and adjacent to protected wetlands. To comply with federal clean water standards, a floating turbidity curtain was installed across the river to capture sediment generated from construction before it could flow downstream. This was the first time this curtain had been used in Arizona.

This design-build project was fast-tracked with a total design and construction schedule of only 600 calendar days. Despite heavy rainfall and flooding in the Salt River, the team completed the project eight months earlier than ADOT’s original anticipated schedule.

The project was constructed using lane closures and phased construction to maintain continuous flow of traffic during construction.

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“This project will be used as the model of what can be accomplished when a design-build partnership works as well as this team’s partnership worked.”

Robert Samour, Deputy State Engineer, Arizona Department of Transportation


Awards & Accolades

2011 APWA Award, Transportation, American Public Works Association

2010 Marvin M. Black Excellence in Partnering, AGC of America