I-15 (SR-15)
I-15 (SR-15) in Approx. 4200 So. On I-15, Salt Lake County, Utah received a condition grade of F (0/100). Built in 1962, the bridge carries 219K vehicles daily on I-15 (SR-15) over Big Cottonwood Creek. It is classified as structurally deficient.
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 64-year-old bridge located Approx. 4200 So. On I-15 in Salt Lake County, Utah. The bridge carries I-15 (SR-15) over Big Cottonwood Creek with 12 traffic lanes, handling approximately 219K vehicles per day. Built in 1962 and reconstructed in 1998, the structure spans 7.5 meters.
The bridge received a Condition Grade of F (0/100) based on Federal Highway Administration inspection data. Its deck is rated 0/9 (serious), superstructure 0/9 (serious), and substructure 0/9 (serious). The bridge is classified as structurally deficient, meaning at least one major component is rated 4 or below — this signals a need for repair or replacement but does not necessarily indicate an immediate safety hazard.
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I-15 (SR-15) has a Condition Score of 0/100 (Grade F). Its deck is rated 0/9, superstructure 0/9, and substructure 0/9 on the NBI scale. The bridge is classified as structurally deficient.
I-15 (SR-15) was built in 1962 and reconstructed in 1998, making it 64 years old. The average bridge age in the United States is 48 years.
I-15 (SR-15) carries approximately 219K vehicles per day (average daily traffic). The bridge has 12 traffic lanes. It is 7.5 meters long and located on I-15 (SR-15) in Approx. 4200 So. On I-15, Salt Lake County, Utah.
Yes, I-15 (SR-15) is classified as structurally deficient because at least one of its primary components (deck, superstructure, or substructure) is rated 4 or below on the 0-9 NBI scale. This does not necessarily mean it is unsafe, but it requires significant repair or replacement.
I-15 (SR-15) is located Approx. 4200 So. On I-15 in Salt Lake County, Utah. The bridge carries I-15 (SR-15) over Big Cottonwood Creek. Its coordinates are 40.680761, -111.901806. It is maintained by State Highway Agency.
I-15 (SR-15) carries I-15 (SR-15) over Big Cottonwood Creek. The bridge is 7.5 meters long and was built in 1962, with reconstruction in 1998.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.