I-15 widening project concludes after 310 days

Completed I-15 widening and Virgin River bridges project, St. George Utah, Decemeber 2017 | Photo courtesy of the Utah Department of Transportation, St. George News

ST. GEORGE – Work on Interstate 15 between the Brigham Road and the Dixie Drive/Exit 5 interchanges has officially come to an end after nearly a year.

The Utah Department of Transportation announced Friday via email work had completed after 310 days. All lanes are open and there are no more traffic cones in sight.

We thank you for your patience during the construction of this project and wish you and yours a happy holiday season and safe travels,” UDOT officials said in the project’s final email update Friday.

Set between Exits 4 and 5 on I-15, the purpose of the project was to add an auxiliary lane in both directions that now allows drivers to enter the freeway and exit at the next interchange without merging with through-traffic or changing lanes – basically just driving straight on through.

The new lanes are anticipated to improve traffic flow and enhance safety.

Adding the new lanes required demolishing and replacing the narrow bridges over the Virgin River. In addition to providing a third lane of travel, the new bridges can accommodate the creation of a fourth lane in the future.

With the completion of the project, UDOT provided the following points of interests:

  • Approximately 24,000 cubic yards of material was excavated around the river and the Virgin River was “moved” two times.
  • There were two significant flood events in the river that affected work.
  • Bridge foundation shafts are anchored into bedrock approximately 60 feet below the ground surface.
  • Approximately 15,000 cubic yards of rip-rap was placed to protect the new bridges from scour and erosion during future flood events.
  • Approximately 11,000 feet of 4-foot diameter concrete shafts were installed to stabilize the soil and protect the bridges during an earthquake.
  • The roadway required 18,000 tons of new asphalt.
  • There are over 1 million pounds of reinforcing steel and 4,400 cubic yards of concrete in the new bridges.
  • Approximately 12,750 square feet of new retaining walls were installed.

While motorists may rejoice in one road project coming to an end, they can also anticipate the beginning of another in St. George as UDOT begins work on widening the northern part of Bluff Street in early 2018.

Email: [email protected]

Twitter: @MoriKessler

Copyright St. George News, SaintGeorgeUtah.com LLC, 2017, all rights reserved.

Free News Delivery by Email

Would you like to have the day's news stories delivered right to your inbox every evening? Enter your email below to start!


  • paul December 23, 2017 at 11:12 am

    I’m sure they will tear it up again for some stupid reason to milk out the project

  • Caveat_Emptor December 24, 2017 at 10:01 am

    I am sure most of us are thankful to have improved flow through this section.
    The only outstanding issue for me is when the City of SG will connect the trail on the south side of the Virgin River to the frontage road on the west side of I-15 for easy access to the Wal-Mart shopping complex.
    It seems to be an easy connection now that construction is complete. Many of us would appreciate the much safer route to Wal-Mart rather than having to navigate the treacherous traffic roundabouts.

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.