SR439 Usa Parkway over Wash
Lyon County, Nevada · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SR439 Usa Parkway over Wash in Lyon County, Nevada, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 2017, making it 8 years old at the 2025 inventory.
- It carries about 4,850 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 31 of the 54 inventoried bridges in Lyon County rated good (57.4%); 4 (7.4%) 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 June 2021, on a 48-month routine inspection cycle.
- 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.
View this bridge on a map → (39.43024, -119.33611)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 7 | 7 | Good condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 40 ft |
| Location | 4.61 Miles from US50 |
| NBI structure number | B3199 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | June 2021 |
| Inspection interval (item 91) | 48 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Nevada department of transportation.
Busiest bridges in Lyon County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 95A over UPRR | 2006 | 29,500 | Good |
| US 50 over Ditch | 2012 | 18,600 | Good |
| SR 822 Dayton Vly over Carson Rvr | 1956 | 11,200 | Fair |
| I 80E over Sprr | 1963 | 10,850 | Good |
| I 80W over Sprr | 1963 | 10,850 | Good |
| I 80E over Vine St Grade Sep MP47 | 1963 | 10,850 | Good |
All bridges nearby: Lyon County, NV bridge conditions · every bridge in Lyon County · Nevada bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.