County profile · official public datasets

Carson City County, NV

31 public highway bridges tracked in the FHWA National Bridge Inventory: 87.1% rated Good, 12.9% Fair, 0% Poor.

31
Public bridges: 87.1%
Good condition: 0%
Poor condition

The verdict

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

Carson City County pairs a top-quartile lowest Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

Top 25%
lowest Poor share in state: 0%
Poor-condition share: 31
public highway bridges: 2003
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.

Carson City County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Carson City County ranks #4 of 16 Nevada counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 0%). Carson City County, Nevada contains 31 public highway bridges. Roughly 87.1% are rated “Good,” 12.9% “Fair,” and 0% “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

Public highway bridges in Carson City County

Good condition

87.1%

27 of 31 rated 7-9

Fair condition

12.9%

4 of 31 rated 5-6

Poor condition

0 of 31 rated 4 or below

In-state Poor-share rank

#4 of 16

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

Condition distribution

Share of 31 NBI-tracked bridges by lowest applicable component rating.

Good

87.1% (27)

Fair

12.9% (4)

Poor

0% (0)

0% of Carson City County's bridges have passed the 50-year mark

0 of the 31 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 87.1% 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.

1980s

1
1990s

6
2000s

20
2010s

4

What this shows Construction peaked in the 2000s, when 20 of the county's bridges still in the inventory were built, which is 64.5% of those with a recorded year. That cohort is now 15 to 24 years old in the 2024 inventory. Its average build year is 2003, 15 years newer than the Nevada average of 1988.

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

The 5 Nevada counties nearest Carson City County in number of bridges, with their condition splits. Its 0% Poor share is the 2nd-lowest of these 6. Its average build year of 2003 against a peer-group mean of 1970 is 33 years newer.

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

Bridge inventory size and condition shares for Carson City County and the 5 Nevada counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Douglas County	42	59.5%	40.5%	0%	1971
Carson City County (this page)	31	87.1%	12.9%	0%	2003
Eureka County	25	28%	72%	0%	1970
Lander County	21	33.3%	66.7%	0%	1973
Nye County	21	57.1%	42.9%	0%	1963
Lincoln County	12	75%	25%	0%	1972

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 Carson City 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 Carson City County, both outside Nevada so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside NV (31 bridges here).

Hinsdale County, CO · 31 bridges
Kiowa County, CO · 31 bridges
Ogemaw County, MI · 31 bridges
Grant County, MN · 31 bridges

Similar average build year

Nearest mean year-built outside NV (2003 here).

Seminole County, FL · avg 2000 · 177 bridges
Broomfield County, CO · avg 2000 · 66 bridges
Dare County, NC · avg 2000 · 40 bridges
Aleutians East County, AK · avg 2000 · 16 bridges

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

All 31 Good 27 Fair 4 Poor 0

Good-condition bridges (27)

Sort:

Carson City County Bridge Snapshot

Condition distribution

0% of Carson City County's bridges have passed the 50-year mark

How Carson City 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 (27)

US 50 WEST

COMMERCE WY

FAIRVIEW DRIVE

EAST GRAVES LN

US 395

US 395

SR 518 SNYDER AVE

SR513 DEER RUN RD

APPION WAY

I 580N

I 580S

I 580N

I 580S

Clearview

KOONTZ LANE

I 580N

I 580S

Fairview Drive

I 580S

I 580N

I 580N

I 580S

I 580N

I 580S

I 580N

I 580S

SR 513 5TH STREET

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