Nevada Bridges

2,099 highway bridges across 17 counties · NBI 2024 data

1.1% in poor condition
National avg: 6.8%
1,223
852
Good: 1,223 (58.3%) Fair: 852 (40.6%) Poor: 24 (1.1%)

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.

24 of 2,099 Nevada bridges have a rating of 4 or below. Rating 4 = advanced deterioration.

#BridgeRatingLocationBuiltDaily Traffic
1SHADY 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. · DAYTON1945128
2CROSS 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 WINNEMUCCA19709,000
3I 80
over CITY STREETS(NUGGET)
Advanced section loss and deterioration present. Built 60 years ago, approaching the end of typical service life. Carries heavy traffic volume of 69,000 vehicles daily.
4
Washoe County Co. · SPARKS196669,000
4PARADISE 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 VEGAS197136,000
5KEYSTONE 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. · RENO196612,800
6GREG ST
over TRUCKEE RIVER
Advanced section loss and deterioration present. Serves 11,200 vehicles per day.
4
Washoe County Co. · SPARKS198011,200
7ARLINGTON 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 BRIDGE193810,000
8SIERRA 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. · RENO19377,600
9IDAHO ST
over DRY WASH
Advanced section loss and deterioration present. Built 52 years ago, approaching the end of typical service life.
4
Elko County Co. · ELKO19746,700
10US 95
over ELDORADO LAKE
Advanced section loss and deterioration present.
4
Clark County Co. · NORTH OF SEARCHLIGHT19774,325

Bridges by County

Clark County holds 54% of Nevada's bridges. Storey County has the highest deficiency rate.

CountyBridgesConditionPoorPoor %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
20.2%25,060
Washoe County
One of Nevada's largest bridge inventories. High-traffic area averaging 25,383 vehicles per bridge daily.
334
195
136
72.1%25,383
Elko County
One of Nevada's largest bridge inventories.
217
127
88
62.8%3,344
Churchill County
No bridges in poor condition.
70
41
28
00.0%2,527
Humboldt County54
31
22
23.7%3,045
Lyon County
Poor condition rate significantly above state average.
53
31
22
4
47.5%4,102
Pershing County
No bridges in poor condition.
52
30
21
00.0%4,006
Douglas County
No bridges in poor condition.
42
24
17
00.0%7,632
Carson City
No bridges in poor condition.
31
18
13
00.0%12,795
Eureka County
No bridges in poor condition.
25
15
10
00.0%2,339

Infrastructure Profile

Key Metrics
Average bridge age38 years
Average year built1988
Oldest bridge1900
Newest bridge2024
Avg daily traffic/bridge18,818
Total daily crossings39.5M
Rating Distribution (0–9 scale)
0–4 = Poor · 5–6 = Fair · 7–9 = Good
Construction Materials
Concrete1,255(59.8%)
Prestressed Concrete559(26.6%)
Steel268(12.8%)
Wood/Timber15(0.7%)
Metal (Other)2(0.1%)

Nevada vs. National Average

Poor Condition
1.1%
National: 6.8%✓ Better
Good Condition
58.3%
National: 44.1%✓ Better
Average Age
38 yr
National: 49 yr✓ Better
Avg Daily Traffic
18,818
National: 7,954✓ Better
Data Source: Federal Highway Administration, National Bridge Inventory 2024. Bridge conditions rated 0–9 per FHWA Recording and Coding Guide. "Poor" = rating ≤ 4 on deck, superstructure, substructure, or culvert.
Inspections typically occur every 24 months. Structurally deficient does not mean unsafe.