I-15 (SR-15) SBL
I-15 (SR-15) SBL in In American Fork, Utah County, Utah received a condition grade of B (78/100). Built in 2011, the bridge carries 210K vehicles daily on I-15 (SR-15) SBL over 300 West Street.
I-15 (SR-15) SBL 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) SBL carries an average daily traffic count of 209,636 vehicles, with 6 lane(s) crossing 300 West 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) SBL is a 15-year-old bridge located In American Fork in Utah County, Utah. The bridge carries I-15 (SR-15) SBL over 300 West Street with 6 traffic lanes, handling approximately 210K vehicles per day. Built in 2011, the structure spans 36.6 meters.
The bridge received a Condition Grade of B (78/100) based on Federal Highway Administration inspection data. Its deck is rated 6/9 (fair), 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 (SR-15) SBL has a Condition Score of 78/100 (Grade B). Its deck is rated 6/9, superstructure 8/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
I-15 (SR-15) SBL was built in 2011, making it 15 years old. The average bridge age in the United States is 48 years.
I-15 (SR-15) SBL carries approximately 210K vehicles per day (average daily traffic). The bridge has 6 traffic lanes. It is 36.6 meters long and located on I-15 (SR-15) SBL in In American Fork, Utah County, Utah.
No, I-15 (SR-15) SBL 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) SBL is located In American Fork in Utah County, Utah. The bridge carries I-15 (SR-15) SBL over 300 West Street. Its coordinates are 40.372981, -111.807750. It is maintained by State Highway Agency.
I-15 (SR-15) SBL carries I-15 (SR-15) SBL over 300 West Street. The bridge is 36.6 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.