Total bridges
49
Public highway bridges in Yuma County
County profile · official public datasets
Yuma County, CO
49 public highway bridges tracked in the FHWA National Bridge Inventory: 51% rated Good, 44.9% Fair, 4.1% Poor.
- 49
- Public bridges
- 51%
- Good condition
- 4.1%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Yuma County posts a better-than-median Poor-condition share among rated counties in the state across rated county bridge inventory.
- Top 45%
- lowest Poor share in state
- 4.1%
- Poor-condition share
- 49
- public highway bridges
- 1981
- 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.
Yuma County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Yuma County ranks #29 of 64 Colorado counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 4.1%). Yuma County, Colorado contains 49 public highway bridges. Roughly 51% are rated “Good,” 44.9% “Fair,” and 4.1% “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
51%
25 of 49 rated 7-9
Fair condition
44.9%
22 of 49 rated 5-6
Poor condition
4.1%
2 of 49 rated 4 or below
In-state Poor-share rank
#29 of 64
Among Colorado counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 49 NBI-tracked bridges by lowest applicable component rating.
Good 51% (25)
Fair 44.9% (22)
Poor 4.1% (2)
Yuma County's Poor-condition bridges carry 3,409 vehicle crossings a day
That is 11.1% of the county's reported daily bridge traffic on 4.1% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 1,705 crossings a day against 530 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 49 of 49 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
36.7% of Yuma County's bridges have passed the 50-year mark
18 of the 49 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 51% 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 93% of the county's Poor-condition bridge traffic
Blake Street over N. Fork Republican River, built 1980, carries 3,169 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 3,409 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Yuma County's bridges were built
49 bridges with a recorded construction year, grouped by decade
- 1930s 1
1930–1939
1 bridges
- 1940s 5
1940–1949
5 bridges
- 1950s 5
1950–1959
5 bridges
- 1960s 6
1960–1969
6 bridges
- 1970s 1
1970–1979
1 bridges
- 1980s
1980–1989
10 bridges
- 1990s
1990–1999
16 bridges
- 2000s 1
2000–2009
1 bridges
- 2010s 1
2010–2019
1 bridges
- 2020s 3
2020–2029
3 bridges
What this shows Construction peaked in the 1990s, when 16 of the county's bridges still in the inventory were built, which is 32.7% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year (1981) matches the Colorado average (1982).
How Yuma County compares with Colorado's closest counties by inventory size
The 5 Colorado counties nearest Yuma County in number of bridges, with their condition splits. Its 4.1% Poor share is the 3rd-lowest of these 6. Its average build year of 1981 against a peer-group mean of 1979 is in line with the group.
Showing the 5 closest of 63 Colorado counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Summit County | 57 | 22.8% | 71.9% | 5.3% | 1980 |
| Park County | 55 | 29.1% | 67.3% | 3.6% | 1975 |
| Rio Blanco County | 54 | 31.5% | 66.7% | 1.9% | 1980 |
| Yuma County (this page) | 49 | 51% | 44.9% | 4.1% | 1981 |
| Jackson County | 47 | 31.9% | 63.8% | 4.3% | 1983 |
| Archuleta County | 44 | 29.5% | 63.6% | 6.8% | 1976 |
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 Yuma 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 Yuma County, both outside Colorado so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside CO (49 bridges here).
- Mono County, CA · 49 bridges
- Calhoun County, FL · 49 bridges
- Crawford County, GA · 49 bridges
- Johnson County, GA · 49 bridges
Similar average build year
Nearest mean year-built outside CO (1981 here).
- Franklin County, OH · avg 1981 · 922 bridges
- Greenville County, SC · avg 1981 · 635 bridges
- Montgomery County, OH · avg 1981 · 632 bridges
- McLean County, IL · avg 1981 · 624 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Poor-condition bridges (2)
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.