I 580
I 580 in Reno, Washoe County, Nevada received a condition grade of B (68/100). Built in 1971, the bridge carries 163K vehicles daily on I 580 over Sr647 4th ST Sprr.
I 580 carries a B on the BridgeSafety Condition Score with 68/100. 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 1971 and is now 55 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 580 carries an average daily traffic count of 163,000 vehicles, with 7 lane(s) crossing Sr647 4th ST Sprr. 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 is a 55-year-old bridge located Reno in Washoe County, Nevada. The bridge carries I 580 over Sr647 4th ST Sprr with 7 traffic lanes, handling approximately 163K vehicles per day. Built in 1971, the structure spans 140.5 meters.
The bridge received a Condition Grade of B (68/100) based on Federal Highway Administration inspection data. Its deck is rated 6/9 (fair), superstructure 6/9 (fair), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I 580 has a Condition Score of 68/100 (Grade B). Its deck is rated 6/9, superstructure 6/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
I 580 was built in 1971, making it 55 years old. The average bridge age in the United States is 48 years.
I 580 carries approximately 163K vehicles per day (average daily traffic). The bridge has 7 traffic lanes. It is 140.5 meters long and located on I 580 in Reno, Washoe County, Nevada.
No, I 580 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 is located Reno in Washoe County, Nevada. The bridge carries I 580 over Sr647 4th ST Sprr. Its coordinates are 39.533650, -119.787697. It is maintained by State Highway Agency.
I 580 carries I 580 over Sr647 4th ST Sprr. The bridge is 140.5 meters long and was built in 1971.
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.