I-15 (SR-15) NBL
I-15 (SR-15) NBL in I-15 & 400 North In O, Utah County, Utah received a condition grade of B (78/100). Built in 2011, the bridge carries 153K vehicles daily on I-15 (SR-15) NBL over 400 North Street.
I-15 (SR-15) NBL carries a B on the BridgeSafety Condition Score with 78/100. 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 2011 and is 15 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 (SR-15) NBL carries an average daily traffic count of 152,799 vehicles, with 7 lane(s) crossing 400 North Street. 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) NBL is a 15-year-old bridge located I-15 & 400 North In O in Utah County, Utah. The bridge carries I-15 (SR-15) NBL over 400 North Street with 7 traffic lanes, handling approximately 153K vehicles per day. Built in 2011, the structure spans 32.3 meters.
The bridge received a Condition Grade of B (78/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 6/9 (fair), and substructure 8/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I-15 (SR-15) NBL has a Condition Score of 78/100 (Grade B). Its deck is rated 7/9, superstructure 6/9, and substructure 8/9 on the NBI scale. The bridge is not classified as structurally deficient.
I-15 (SR-15) NBL was built in 2011, making it 15 years old. The average bridge age in the United States is 48 years.
I-15 (SR-15) NBL carries approximately 153K vehicles per day (average daily traffic). The bridge has 7 traffic lanes. It is 32.3 meters long and located on I-15 (SR-15) NBL in I-15 & 400 North In O, Utah County, Utah.
No, I-15 (SR-15) NBL 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) NBL is located I-15 & 400 North In O in Utah County, Utah. The bridge carries I-15 (SR-15) NBL over 400 North Street. Its coordinates are 40.304294, -111.725664. It is maintained by State Highway Agency.
I-15 (SR-15) NBL carries I-15 (SR-15) NBL over 400 North Street. The bridge is 32.3 meters long and was built in 2011.
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.