I 580 Ramp over SR647 4TH St Sprr
Washoe County, Nevada · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I 580 Ramp over SR647 4TH St Sprr in Washoe County, Nevada, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1971, making it 54 years old at the 2025 inventory.
- It carries about 24,100 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 168 of the 338 inventoried bridges in Washoe County rated fair (49.7%); 7 (2.1%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated April 2024, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (39.53361, -119.78727)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 459 ft |
| Location | Reno |
| NBI structure number | G1233R |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | April 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Nevada department of transportation.
Busiest bridges in Washoe County
| 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 |
All bridges nearby: Washoe County, NV bridge conditions · every bridge in Washoe County · Nevada bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.