I 580 NB
I 580 NB in Reno, Washoe County, Nevada received a condition grade of B (78/100). Built in 1977, the bridge carries 163K vehicles daily on I 580 NB over Sr648 Glendale Av.
I 580 NB 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 1977, making it 49 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 580 NB carries an average daily traffic count of 163,000 vehicles, with 7 lane(s) crossing Sr648 Glendale Av. 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 580 NB is a 49-year-old bridge located Reno in Washoe County, Nevada. The bridge carries I 580 NB over Sr648 Glendale Av with 7 traffic lanes, handling approximately 163K vehicles per day. Built in 1977 and reconstructed in 2018, the structure spans 50.3 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 580 NB 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 580 NB was built in 1977 and reconstructed in 2018, making it 49 years old. The average bridge age in the United States is 48 years.
I 580 NB carries approximately 163K vehicles per day (average daily traffic). The bridge has 7 traffic lanes. It is 50.3 meters long and located on I 580 NB in Reno, Washoe County, Nevada.
No, I 580 NB 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 580 NB is located Reno in Washoe County, Nevada. The bridge carries I 580 NB over Sr648 Glendale Av. Its coordinates are 39.527467, -119.783875. It is maintained by State Highway Agency.
I 580 NB carries I 580 NB over Sr648 Glendale Av. The bridge is 50.3 meters long and was built in 1977, with reconstruction in 2018.
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.