County profile · official public datasets

Clark County, NV

1,141 public highway bridges tracked in the FHWA National Bridge Inventory: 66% rated Good, 33.8% Fair, 0.2% Poor.

1,141
Public bridges: 66%
Good condition: 0.2%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Clark County pairs a higher-than-median Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

11th
of 16 on Poor share: 0.2%
Poor-condition share: 1,141
public highway bridges: 1996
avg year built

Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.

Clark County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Clark County ranks #11 of 16 Nevada counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 0.2%). Clark County, Nevada contains 1,141 public highway bridges. Roughly 66% are rated “Good,” 33.8% “Fair,” and 0.2% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

Total bridges

1,141

Public highway bridges in Clark County

Good condition

66%

753 of 1,141 rated 7-9

Fair condition

33.8%

386 of 1,141 rated 5-6

Poor condition

0.2%

2 of 1,141 rated 4 or below

In-state Poor-share rank

#11 of 16

Among Nevada counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 1,141 NBI-tracked bridges by lowest applicable component rating.

Good

66% (753)

Fair

33.8% (386)

Poor

0.2% (2)

Clark County's Poor-condition bridges carry 40,325 vehicle crossings a day

That is 0.1% of the county's reported daily bridge traffic on 0.2% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 20,163 crossings a day against 23,296 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.

Computed over the 1,141 of 1,141 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

14.3% of Clark County's bridges have passed the 50-year mark

163 of the 1,141 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 66% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.

Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.

One structure carries 89.3% of the county's Poor-condition bridge traffic

PARADISE RD over TROPICANA WASH, built 1971, carries 36,000 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 2-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 40,325 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1930s

4
1940s

9
1950s

28
1960s

93
1970s

57
1980s

112
1990s

346
2000s

240
2010s

218
2020s

34

What this shows Construction peaked in the 1990s, when 346 of the county's bridges still in the inventory were built, which is 30.3% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year is 1996, 8 years newer than the Nevada average of 1988.

How Clark County compares with Nevada's closest counties by inventory size

The 5 Nevada counties nearest Clark County in number of bridges, with their condition splits. Its 0.2% Poor share is the 2nd-lowest of these 6. Its average build year of 1996 against a peer-group mean of 1977 is 19 years newer.

Showing the 5 closest of 15 Nevada counties eligible for comparison.

Bridge inventory size and condition shares for Clark County and the 5 Nevada counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Clark County (this page)	1,141	66%	33.8%	0.2%	1996
Washoe County	334	51.2%	46.7%	2.1%	1986
Elko County	217	44.7%	52.5%	2.8%	1974
Churchill County	70	51.4%	48.6%	0%	1981
Humboldt County	54	33.3%	63%	3.7%	1970
Lyon County	53	56.6%	35.8%	7.5%	1975

Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Clark County's. Source: FHWA National Bridge Inventory, 2024 release.

Nationwide counties with similar inventory size or average build year

Two NBI-derived peer sets for Clark County, both outside Nevada so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside NV (1,141 bridges here).

Tulsa County, OK · 1,135 bridges
Pima County, AZ · 1,150 bridges
Collin County, TX · 1,127 bridges
Orange County, CA · 1,164 bridges

Similar average build year

Nearest mean year-built outside NV (1996 here).

Hamilton County, IN · avg 1996 · 454 bridges
Hays County, TX · avg 1996 · 272 bridges
Jackson County, MS · avg 1996 · 268 bridges
Douglas County, CO · avg 1996 · 263 bridges

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 1,141 Good 753 Fair 386 Poor 2

Good-condition bridges (753)

Sort:

Clark County Bridge Snapshot

Condition distribution

Clark County's Poor-condition bridges carry 40,325 vehicle crossings a day

14.3% of Clark County's bridges have passed the 50-year mark

One structure carries 89.3% of the county's Poor-condition bridge traffic

How Clark County compares with Nevada's closest counties by inventory size

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

Good-condition bridges (753)

I 15

US 95

US 95

ASPEN BAY LN

SR582 BOULDER HW

I 15

US 95

US 95

US 95

GALLERIA DRIVE

I 15

I 15

HIGHLAND TRAIL

SUMMERLIN HOV

SR 157

Green Valley PKWY.

SR604/LAS VEGAS BL

VAN WAGENEN ST

GOWAN RD

US 95 RAMP 3

W ALEXANDER RD

DECATUR BLVD

GREENWAY RD

PATRICK LN

HUALAPAI WAY

CACTUS AVENUE

US 95

IN/OUT CONVENTION

OFF RAMP FLAMINGO

PEARL ST

RAINBOW BLVD

ELKHORN RD

CD-S RAMP

SR 604LAS VEGAS BL

I 15

MESQUITE BLVD

Cameron Street

BIA IRR ROUTE 1

I 15

I-15

SCHUSTER ST

I-15 S. RAMP

LINTWHITE ST

I15

APEX GREAT BASIN

GALLERIA DR

S. CIMARRON ROAD

LAMB BLVD

HARMON AV

ACCESS TO GARAGE

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