I 15S
I 15S in Las Vegas, Clark County, Nevada received a condition grade of B (78/100). Built in 1994, the bridge carries 122K vehicles daily on I 15S over Sr591 Spring Mtn RD.
I 15S 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 1994, making it 32 years old — past the early-life period but still well within typical service life. Routine inspections and modest repair work are normal for bridges in this age band. I 15S carries an average daily traffic count of 121,500 vehicles, with 5 lane(s) crossing Sr591 Spring Mtn RD. 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 15S is a 32-year-old bridge located Las Vegas in Clark County, Nevada. The bridge carries I 15S over Sr591 Spring Mtn RD with 5 traffic lanes, handling approximately 122K vehicles per day. Built in 1994, the structure spans 70.7 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 15S 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 15S was built in 1994, making it 32 years old. The average bridge age in the United States is 48 years.
I 15S carries approximately 122K vehicles per day (average daily traffic). The bridge has 5 traffic lanes. It is 70.7 meters long and located on I 15S in Las Vegas, Clark County, Nevada.
No, I 15S 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 15S is located Las Vegas in Clark County, Nevada. The bridge carries I 15S over Sr591 Spring Mtn RD. Its coordinates are 36.126164, -115.180756. It is maintained by State Highway Agency.
I 15S carries I 15S over Sr591 Spring Mtn RD. The bridge is 70.7 meters long and was built in 1994.
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.