I 15
I 15 in Las Vegas, Clark County, Nevada received a condition grade of F (0/100). Built in 1964, the bridge carries 199K vehicles daily on I 15 over Boulder JCT Wash. 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 is a 62-year-old bridge located Las Vegas in Clark County, Nevada. The bridge carries I 15 over Boulder JCT Wash with 16 traffic lanes, handling approximately 199K vehicles per day. Built in 1964, the structure spans 9.1 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 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 was built in 1964, making it 62 years old. The average bridge age in the United States is 48 years.
I 15 carries approximately 199K vehicles per day (average daily traffic). The bridge has 16 traffic lanes. It is 9.1 meters long and located on I 15 in Las Vegas, Clark County, Nevada.
Yes, I 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 is located Las Vegas in Clark County, Nevada. The bridge carries I 15 over Boulder JCT Wash. Its coordinates are 36.078186, -115.180689. It is maintained by State Highway Agency.
I 15 carries I 15 over Boulder JCT Wash. The bridge is 9.1 meters long and was built in 1964.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.