Intermountain Contractor’s Top Projects of 2009 in Utah and Idaho

30 I-15 Farmington to Gordon Avenue $58 M

Owner: UDOT
GC: Staker Parson Companies
Key Subs: Ames Construction; Chatfield Construction

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Slated to wrap up in July, this unique project was given the name “Davis County Lane Gain” as it is a freeway widening project for the I-15 corridor between State Street in Farmington and Main Street in Layton – a total of 8.55 miles. The project added a new HOV lane in each direction on I-15 from the State St. overpass (located just west of the Lagoon amusement park) to the south Layton interchange (Exit 330) in south Layton.
This has historically been one of the most congested areas in the State due to limited alternative routes for traffic. UDOT hoped that the completion of this project, along with the completion of an adjoining highway project called The Legacy Parkway, would decrease congestion for commuters through this area.

Construction of the project involved excavating and filling in the existing median to provide for the new lanes. The bridge at 200 North in Kaysville was also widened to accommodate the new lanes. Four different types of cast-in-place constant slope barrier was constructed to separate NB and SB traffic throughout the length of the project. An MSE wall was constructed in the southbound direction between the South Layton on-ramp and 200 North off-ramp. Construction of the wall was necessary due to limited space where a commuter rail line runs parallel to the interstate and allowed for widening this section of roadway. By thus providing a longer transition lane for traffic entering the freeway at the South Layton on-ramp, traffic safety in this area was greatly improved.

All new drainage features and traffic safety features were installed throughout the project. Over 15,000 lf of precast noise wall was installed to minimize traffic noise for residents living nearby. The existing concrete roadway was rubbleized and overlaid with 7-in of hot mix asphalt and 1-in of open graded surface course.

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