Engineering and construction company Fluor Corp. said Wednesday its joint venture, Provo River Constructors, was chosen by the Utah Department of Transportation for a $1.1 billion expansion of a stretch of highway that connects Salt Lake City with the Provo/Orem area.

Fluor said it expects financing details to be worked out no later than the first quarter of 2010. Utah's state legislature has already authorized taxes and bonds to support the construction.

The project will add 23 miles of two additional lanes on southbound and northbound routes of U.S. I-15 from American Fork to Provo in Utah, and will extend an existing express lane from Orem to Provo.

The project also includes replacing or fixing bridges and interchanges.

Provo River is a joint venture led by Fluor that includes Ames Construction Inc., Wadsworth Construction Co. and Wadsworth Brothers Construction.