SH 121 / SH 289 Collin County and I-35E Interchange
Increasing population and development in the area surrounding SH 121 resulted in highway congestion, along with poor mobility, safety and air quality. Under two separate contracts, Balfour Beatty Infrastructure, Inc. is working on two significant projects along State Highway 121 in Texas. The first project, SH 121/SH 289 in Collin County, calls for the reconstruction of more than five miles of existing highway, and the replacement of an existing at-grade interchange with a three-level interchange.

Owner:

Texas Department of Transportation

Location:

SH 121 / SH 289 - Frisco, Texas
SH 121 I-35E - Lewisville, Texas

Contract Value:

$84.3 million - SH 121/SH 289
$86.9 million - SH 121 I-35E

The second of these two projects involves the addition of 3.3 miles of main lanes from SH 121 to Denton Creek to east of I-35E, along with the construction of retaining walls. The project also includes reconstructing the interchange at I-35E and SH 121.

SH 121 was identified as one of the most critical projects in the Dallas area for providing access to emerging suburban areas. Balfour Beatty Infrastructure has successfully achieved all critical milestones on both of these segments of SH 121.