I-15 (SR-15) SB
I-15 (SR-15) SB in At The Draper X-Roads.Int, Salt Lake County, Utah received a condition grade of B (78/100). Built in 2004, the bridge carries 177K vehicles daily on I-15 (SR-15) SB over SR-71 Intchg. X-Road..
I-15 (SR-15) SB 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 2004 and is 22 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) SB carries an average daily traffic count of 176,645 vehicles, with 5 lane(s) crossing SR-71 Intchg. X-Road.. 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) SB is a 22-year-old bridge located At The Draper X-Roads.Int in Salt Lake County, Utah. The bridge carries I-15 (SR-15) SB over SR-71 Intchg. X-Road. with 5 traffic lanes, handling approximately 177K vehicles per day. Built in 2004, the structure spans 62.7 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 7/9 (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) SB has a Condition Score of 78/100 (Grade B). Its deck is rated 7/9, superstructure 7/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
I-15 (SR-15) SB was built in 2004, making it 22 years old. The average bridge age in the United States is 48 years.
I-15 (SR-15) SB carries approximately 177K vehicles per day (average daily traffic). The bridge has 5 traffic lanes. It is 62.7 meters long and located on I-15 (SR-15) SB in At The Draper X-Roads.Int, Salt Lake County, Utah.
No, I-15 (SR-15) SB 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) SB is located At The Draper X-Roads.Int in Salt Lake County, Utah. The bridge carries I-15 (SR-15) SB over SR-71 Intchg. X-Road.. Its coordinates are 40.527133, -111.891478. It is maintained by State Highway Agency.
I-15 (SR-15) SB carries I-15 (SR-15) SB over SR-71 Intchg. X-Road.. The bridge is 62.7 meters long and was built in 2004.
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.