I-15
I-15 in Hill Field RD Interchange, Davis County, Utah received a condition grade of A (81/100). Built in 2016, the bridge carries 143K vehicles daily on I-15 over SR-232 Hill Field RD.
I-15 carries an A on the BridgeSafety Condition Score with 81/100. Deck, superstructure, and substructure ratings all sit in the better tier of the FHWA NBI distribution. The bridge is structurally sound by federal standards.
The bridge was built in 2016 and is 10 years old — relatively young against the U.S. bridge stock. Modern bridges built to current FHWA standards generally outperform older structures on condition ratings. I-15 carries an average daily traffic count of 143,101 vehicles, with 3 lane(s) crossing SR-232 Hill Field RD. The owning agency is State Highway Agency; bridge inspection records flow into the federal NBI database annually.
Component Ratings
The riding surface, evaluated for cracking, spalling, and wear
Beams, girders, and trusses that support the deck
Piers, abutments, and foundations below the deck
Bridge Details
About This Bridge
I-15 is a 10-year-old bridge located Hill Field RD Interchange in Davis County, Utah. The bridge carries I-15 over SR-232 Hill Field RD with 3 traffic lanes, handling approximately 143K vehicles per day. Built in 2016, the structure spans 55.3 meters.
The bridge received a Condition Grade of A (81/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 8/9 (good), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I-15 has a Condition Score of 81/100 (Grade A). Its deck is rated 7/9, superstructure 8/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
I-15 was built in 2016, making it 10 years old. The average bridge age in the United States is 48 years.
I-15 carries approximately 143K vehicles per day (average daily traffic). The bridge has 3 traffic lanes. It is 55.3 meters long and located on I-15 in Hill Field RD Interchange, Davis County, Utah.
No, I-15 is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
I-15 is located Hill Field RD Interchange in Davis County, Utah. The bridge carries I-15 over SR-232 Hill Field RD. Its coordinates are 41.073889, -111.976667. It is maintained by State Highway Agency.
I-15 carries I-15 over SR-232 Hill Field RD. The bridge is 55.3 meters long and was built in 2016.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.
Source: FHWA National Bridge Inventory, 2026.