I-15 (SR-15)
I-15 (SR-15) in 0.7 MI.No. Center ST.-Nsl, Davis County, Utah received a condition grade of B (70/100). Built in 1997, the bridge carries 164K vehicles daily on I-15 (SR-15) over 1100 West ST. (Main ST.).
I-15 (SR-15) carries a B on the BridgeSafety Condition Score with 70/100. Most component ratings are solid; one or two may show wear consistent with the structure’s age, but the bridge is not flagged as structurally deficient.
The bridge was built in 1997, making it 29 years old — past the early-life period but still well within typical service life. Routine inspections and modest repair work are normal for bridges in this age band. I-15 (SR-15) carries an average daily traffic count of 164,022 vehicles, with 10 lane(s) crossing 1100 West ST. (Main ST.). 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 (SR-15) is a 29-year-old bridge located 0.7 MI.No. Center ST.-Nsl in Davis County, Utah. The bridge carries I-15 (SR-15) over 1100 West ST. (Main ST.) with 10 traffic lanes, handling approximately 164K vehicles per day. Built in 1997, the structure spans 46.8 meters.
The bridge received a Condition Grade of B (70/100) based on Federal Highway Administration inspection data. Its deck is rated 6/9 (fair), superstructure 7/9 (good), and substructure 6/9 (fair).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I-15 (SR-15) has a Condition Score of 70/100 (Grade B). Its deck is rated 6/9, superstructure 7/9, and substructure 6/9 on the NBI scale. The bridge is not classified as structurally deficient.
I-15 (SR-15) was built in 1997, making it 29 years old. The average bridge age in the United States is 48 years.
I-15 (SR-15) carries approximately 164K vehicles per day (average daily traffic). The bridge has 10 traffic lanes. It is 46.8 meters long and located on I-15 (SR-15) in 0.7 MI.No. Center ST.-Nsl, Davis County, Utah.
No, I-15 (SR-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 (SR-15) is located 0.7 MI.No. Center ST.-Nsl in Davis County, Utah. The bridge carries I-15 (SR-15) over 1100 West ST. (Main ST.). Its coordinates are 40.850000, -111.911944. It is maintained by State Highway Agency.
I-15 (SR-15) carries I-15 (SR-15) over 1100 West ST. (Main ST.). The bridge is 46.8 meters long and was built in 1997.
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.