Total bridges
42
Public highway bridges in Douglas County
County profile · official public datasets
Douglas County, NV
42 public highway bridges tracked in the FHWA National Bridge Inventory: 59.5% rated Good, 40.5% Fair, 0% Poor.
- 42
- Public bridges
- 59.5%
- Good condition
- 0%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Douglas County pairs a top-quartile lowest Poor-condition share among rated counties in the state with an older average build year than the state inventory.
- Top 19%
- lowest Poor share in state
- 0%
- Poor-condition share
- 42
- public highway bridges
- 1971
- 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.
Douglas County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Douglas County ranks #3 of 16 Nevada counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 0%). Douglas County, Nevada contains 42 public highway bridges. Roughly 59.5% are rated “Good,” 40.5% “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.
Good condition
59.5%
25 of 42 rated 7-9
Fair condition
40.5%
17 of 42 rated 5-6
Poor condition
0%
0 of 42 rated 4 or below
In-state Poor-share rank
#3 of 16
Among Nevada counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 42 NBI-tracked bridges by lowest applicable component rating.
Good 59.5% (25)
Fair 40.5% (17)
Poor 0% (0)
54.8% of Douglas County's bridges have passed the 50-year mark
23 of the 42 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 59.5% 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.
When Douglas County's bridges were built
42 bridges with a recorded construction year, grouped by decade
- 1920s 1
1920–1929
1 bridges
- 1930s
1930–1939
5 bridges
- 1940s
1940–1949
4 bridges
- 1950s
1950–1959
7 bridges
- 1960s
1960–1969
6 bridges
- 1970s
1970–1979
3 bridges
- 1980s
1980–1989
6 bridges
- 1990s 2
1990–1999
2 bridges
- 2000s
2000–2009
5 bridges
- 2010s 2
2010–2019
2 bridges
- 2020s 1
2020–2029
1 bridges
What this shows Construction peaked in the 1950s, when 7 of the county's bridges still in the inventory were built, which is 16.7% of those with a recorded year. That cohort is now 65 to 74 years old in the 2024 inventory. Its average build year is 1971, 17 years older than the Nevada average of 1988.
How Douglas County compares with Nevada's closest counties by inventory size
The 5 Nevada counties nearest Douglas 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 1971 against a peer-group mean of 1978 is 7 years older.
Showing the 5 closest of 15 Nevada counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Humboldt County | 54 | 33.3% | 63% | 3.7% | 1970 |
| Lyon County | 53 | 56.6% | 35.8% | 7.5% | 1975 |
| Pershing County | 52 | 42.3% | 57.7% | 0% | 1972 |
| Douglas County (this page) | 42 | 59.5% | 40.5% | 0% | 1971 |
| Carson City County | 31 | 87.1% | 12.9% | 0% | 2003 |
| Eureka County | 25 | 28% | 72% | 0% | 1970 |
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 Douglas 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 Douglas County, both outside Nevada so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside NV (42 bridges here).
- Montgomery County, GA · 42 bridges
- Lee County, KY · 42 bridges
- Concordia County, LA · 42 bridges
- Talbot County, MD · 42 bridges
Similar average build year
Nearest mean year-built outside NV (1971 here).
- Wayne County, MI · avg 1971 · 1,026 bridges
- Baltimore County, MD · avg 1971 · 783 bridges
- Washington County, PA · avg 1971 · 655 bridges
- Linn County, OR · avg 1971 · 566 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Poor-condition bridges (0)
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.