Bridge conditions in Humboldt County, Nevada
54 inventoried bridges · 1 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 54 bridges in Humboldt County: 19 rated good, 34 fair, and 1 poor.
- 1 of the 54 bridges in Humboldt County, Nevada, are rated in poor condition (1.9%) in the 2025 National Bridge Inventory, as of .
- 19 bridges (35.2%) are rated good and 34 (63.0%) fair.
- The median Humboldt County bridge was built in 1970.
- The busiest poor-rated bridge is IRR FT McDERMITT over Quinn Rvr (built 1976), carrying about 55 vehicles a day.
Good 35.2% · Fair 63.0% · Poor 1.9% of 54 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| IRR FT McDERMITT over Quinn Rvr | 1976 | 55 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR 787 Hansen St over Sprr | 1967 | 12,000 | Fair |
| Cross Road over I 80 | 1970 | 9,000 | Fair |
| US 95 over I 80 | 1976 | 7,050 | Good |
| US 95 over Humboldt Rvr | 1986 | 6,550 | Fair |
| US 95 over UPRR | 1999 | 6,550 | Fair |
| I 80 over McNITCH RD | 1970 | 5,200 | Fair |
| I 80W over McNITCH RD | 1970 | 5,200 | Fair |
| I 80 over Sprr | 1970 | 5,050 | Fair |
| I 80 over Sprr | 1970 | 5,050 | Fair |
| I 80E over Button Point Exit 187 | 1965 | 4,800 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Nevada: Nevada bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.