Nevada Bridges
2,099 highway bridges across 17 counties · NBI 2024 data
About Nevada's Bridge Infrastructure
Nevada maintains 2,099 highway bridges across 17 counties, forming critical links in the state's transportation network. With an average construction year of 1988, the typical bridge in Nevada is approximately 38 years old—11 years newer than the national average of 49 years. The state's oldest bridge dates back to 1900, representing over a century of service and offering a window into historic bridge engineering practices.
Currently, 1.1% of Nevada's bridges are rated in poor condition, better than the national average of 6.8%. This indicates relatively strong investment in bridge maintenance and replacement programs. A "poor" condition rating indicates significant deterioration requiring attention, though these bridges remain safe for travel at their posted limits. Federal regulations require bridge inspections at least every 24 months to ensure public safety.
Bridge conditions in Nevada reflect decades of infrastructure investment decisions shaped by geography, climate, traffic demands, and available funding. Bridges here carry 18,818 vehicles daily on average—137% higher than the national average—placing greater demands on structural maintenance. The state's 39,499,499 total daily bridge crossings underscore how essential this infrastructure is to daily commerce and commuting.
The material composition of Nevada's bridge inventory reflects regional construction practices and evolving engineering standards. The predominant construction material is concrete, accounting for 59.8% of all structures. Material choice affects maintenance requirements, expected lifespan, and vulnerability to environmental factors specific to the region. Understanding these patterns helps transportation planners allocate resources effectively and prioritize infrastructure investments.
Worst-Rated Bridges
View all 24 poor-condition bridges →24 of 2,099 Nevada bridges have a rating of 4 or below. Rating 4 = advanced deterioration.
| # | Bridge | Rating | Location | Built | Daily Traffic |
|---|---|---|---|---|---|
| 1 | SHADY AV over GOLD CANYON CRK Critical condition requiring immediate attention. At 81 years old, this is among Nevada's oldest structures. | 1 | Lyon County Co. · DAYTON | 1945 | 128 |
| 2 | CROSS ROAD over I 80 Serious deterioration affecting structural elements. Built 56 years ago, approaching the end of typical service life. | 3 | Humboldt County Co. · WEST OF WINNEMUCCA | 1970 | 9,000 |
| 3 | SIERRA ST over TRUCKEE RVR Advanced section loss and deterioration present. At 89 years old, this is among Nevada's oldest structures. | 4 | Washoe County Co. · RENO | 1937 | 7,600 |
| 4 | SR 229/HALLECK RD over HUMBOLDT RIVER Advanced section loss and deterioration present. Built 61 years ago, approaching the end of typical service life. | 4 | Elko County Co. · EAST OF ELKO | 1965 | 260 |
| 5 | PARADISE RD over TROPICANA WASH Advanced section loss and deterioration present. Built 55 years ago, approaching the end of typical service life. Serves 36,000 vehicles per day. | 4 | Clark County Co. · LAS VEGAS | 1971 | 36,000 |
| 6 | OLD SR 3C E. WK.R over EAST FORK WALKER RVR Advanced section loss and deterioration present. Built 56 years ago, approaching the end of typical service life. Low-traffic rural crossing. | 4 | Lyon County Co. · SOUTHEAST OF YERINGTON | 1970 | 85 |
| 7 | OLD SR 3C over EAST WALKER RIVER Advanced section loss and deterioration present. Low-traffic rural crossing. | 4 | Lyon County Co. · WEST OF HAWTHORNE | 1976 | 70 |
| 8 | US 95 over ELDORADO LAKE Advanced section loss and deterioration present. | 4 | Clark County Co. · NORTH OF SEARCHLIGHT | 1977 | 4,325 |
| 9 | KEYSTONE AV over TRUCKEE RIVER Advanced section loss and deterioration present. Built 60 years ago, approaching the end of typical service life. Serves 12,800 vehicles per day. | 4 | Washoe County Co. · RENO | 1966 | 12,800 |
| 10 | ARLINGTON AV over TRUCKEE RVR Advanced section loss and deterioration present. At 88 years old, this is among Nevada's oldest structures. | 4 | Washoe County Co. · RENO - S BRIDGE | 1938 | 10,000 |
Bridges by County
Clark County holds 54% of Nevada's bridges. Storey County has the highest deficiency rate.
| County | Bridges ↓ | Condition | Poor | Poor % | Avg ADT |
|---|---|---|---|---|---|
| Clark County Largest bridge inventory in Nevada. Below-average deficiency rate. High-traffic area averaging 25,060 vehicles per bridge daily. | 1,141 | 665 463 | 2 | 0.2% | 25,060 |
| Washoe County One of Nevada's largest bridge inventories. High-traffic area averaging 25,383 vehicles per bridge daily. | 334 | 195 136 | 7 | 2.1% | 25,383 |
| Elko County One of Nevada's largest bridge inventories. | 217 | 127 88 | 6 | 2.8% | 3,344 |
| Churchill County No bridges in poor condition. | 70 | 41 28 | 0 | 0.0% | 2,527 |
| Humboldt County | 54 | 31 22 | 2 | 3.7% | 3,045 |
| Lyon County Poor condition rate significantly above state average. | 53 | 31 22 4 | 4 | 7.5% | 4,102 |
| Pershing County No bridges in poor condition. | 52 | 30 21 | 0 | 0.0% | 4,006 |
| Douglas County No bridges in poor condition. | 42 | 24 17 | 0 | 0.0% | 7,632 |
| Carson City No bridges in poor condition. | 31 | 18 13 | 0 | 0.0% | 12,795 |
| Eureka County No bridges in poor condition. | 25 | 15 10 | 0 | 0.0% | 2,339 |
Infrastructure Profile
| Average bridge age | 38 years |
| Average year built | 1988 |
| Oldest bridge | 1900 |
| Newest bridge | 2024 |
| Avg daily traffic/bridge | 18,818 |
| Total daily crossings | 39.5M |
Nevada vs. National Average
Inspections typically occur every 24 months. Structurally deficient does not mean unsafe.