I-15 (SR-15) SBL
I-15 (SR-15) SBL in Roy Interchange (5600 S.), Weber County, Utah received a condition grade of B (62/100). Built in 1966, the bridge carries 138K vehicles daily on I-15 (SR-15) SBL over SR-97 5600 So. Roy.
I-15 (SR-15) SBL carries a B on the BridgeSafety Condition Score with 62/100. 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 1966 and is now 60 years old, at or past the typical 50-year design life for bridges of its vintage. Maintenance and inspection cycles are correspondingly more involved than for newer structures. I-15 (SR-15) SBL carries an average daily traffic count of 138,457 vehicles, with 3 lane(s) crossing SR-97 5600 So. Roy. 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 60-year-old bridge located Roy Interchange (5600 S.) in Weber County, Utah. The bridge carries I-15 (SR-15) SBL over SR-97 5600 So. Roy with 3 traffic lanes, handling approximately 138K vehicles per day. Built in 1966, the structure spans 55.9 meters.
The bridge received a Condition Grade of B (62/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 6/9 (fair), and substructure 5/9 (fair).
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 62/100 (Grade B). Its deck is rated 7/9, superstructure 6/9, and substructure 5/9 on the NBI scale. The bridge is not classified as structurally deficient.
I-15 (SR-15) SBL was built in 1966, making it 60 years old. The average bridge age in the United States is 48 years.
I-15 (SR-15) SBL carries approximately 138K vehicles per day (average daily traffic). The bridge has 3 traffic lanes. It is 55.9 meters long and located on I-15 (SR-15) SBL in Roy Interchange (5600 S.), Weber 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 Roy Interchange (5600 S.) in Weber County, Utah. The bridge carries I-15 (SR-15) SBL over SR-97 5600 So. Roy. Its coordinates are 41.161944, -112.023056. It is maintained by State Highway Agency.
I-15 (SR-15) SBL carries I-15 (SR-15) SBL over SR-97 5600 So. Roy. The bridge is 55.9 meters long and was built in 1966.
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.