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I 580 over Steamboat Creek

Washoe County, Nevada · rated Good in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

I 580 over Steamboat Creek in Washoe County, Nevada, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 2012, making it 13 years old at the 2025 inventory.
It carries about 40,500 vehicles a day (traffic count year 2021).
Its listed owner is the state highway agency.
It is one of 163 of the 338 inventoried bridges in Washoe County rated good (48.2%); 7 (2.1%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Continuous prestressed concrete single box beam
Length	about 660 ft
Location	North of Galena
NBI structure number	B2521
Condition class	Good

Source: FHWA National Bridge Inventory, 2025 data as reported by the Nevada department of transportation.

Bridge	Built	Vehicles/day	Condition
I 580 over Vassar St	1977	170,000	Good
I 580 SB over 2ND St/GLENDALE AVE	2022	170,000	Good
I 580 over SR647 4TH St Sprr	1971	163,000	Fair
I 580 over SR667 & Truckee Rvr	1971	163,000	Fair
I 580 over Rmp I80E to US395N	1969	163,000	Good
I 580 NB over SR648 Glendale Av	1977	163,000	Good