Total bridges
271
Public highway bridges in Utah County
County profile · official public datasets
Utah County, UT
271 public highway bridges tracked in the FHWA National Bridge Inventory: 37.3% rated Good, 61.6% Fair, 1.1% Poor.
- 271
- Public bridges
- 37.3%
- Good condition
- 1.1%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Utah County pairs a better-than-median Poor-condition share among rated counties in the state with a newer average build year than the state inventory.
- Top 34%
- lowest Poor share in state
- 1.1%
- Poor-condition share
- 271
- public highway bridges
- 1995
- 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.
Utah County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Utah County ranks #10 of 29 Utah counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 1.1%). Utah County, Utah contains 271 public highway bridges. Roughly 37.3% are rated “Good,” 61.6% “Fair,” and 1.1% “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
37.3%
101 of 271 rated 7-9
Fair condition
61.6%
167 of 271 rated 5-6
Poor condition
1.1%
3 of 271 rated 4 or below
In-state Poor-share rank
#10 of 29
Among Utah counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 271 NBI-tracked bridges by lowest applicable component rating.
Good 37.3% (101)
Fair 61.6% (167)
Poor 1.1% (3)
Utah County's Poor-condition bridges carry 3,780 vehicle crossings a day
That is 0% of the county's reported daily bridge traffic on 1.1% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 1,260 crossings a day against 60,252 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 270 of 271 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
21% of Utah County's bridges have passed the 50-year mark
57 of the 271 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 37.3% 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 60% of the county's Poor-condition bridge traffic
200 SOUTH STREET over AMERICAN FORK CREEK, built 1925, carries 2,268 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 3-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 3,780 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Utah County's bridges were built
271 bridges with a recorded construction year, grouped by decade
- 1910s 1
1910–1919
1 bridges
- 1920s 2
1920–1929
2 bridges
- 1930s 2
1930–1939
2 bridges
- 1940s 4
1940–1949
4 bridges
- 1950s 11
1950–1959
11 bridges
- 1960s 30
1960–1969
30 bridges
- 1970s 17
1970–1979
17 bridges
- 1980s 26
1980–1989
26 bridges
- 1990s 23
1990–1999
23 bridges
- 2000s 36
2000–2009
36 bridges
- 2010s
2010–2019
102 bridges
- 2020s 17
2020–2029
17 bridges
What this shows Construction peaked in the 2010s, when 102 of the county's bridges still in the inventory were built, which is 37.6% of those with a recorded year. That cohort is now 5 to 14 years old in the 2024 inventory. Its average build year is 1995, 11 years newer than the Utah average of 1984.
How Utah County compares with Utah's closest counties by inventory size
The 5 Utah counties nearest Utah County in number of bridges, with their condition splits. Its 1.1% Poor share is the 3rd-lowest of these 6. Its average build year of 1995 against a peer-group mean of 1985 is 10 years newer.
Showing the 5 closest of 28 Utah counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Utah County (this page) | 271 | 37.3% | 61.6% | 1.1% | 1995 |
| Box Elder County | 184 | 23.4% | 70.7% | 6% | 1977 |
| Washington County | 177 | 20.3% | 78.5% | 1.1% | 1987 |
| Sevier County | 157 | 19.1% | 80.3% | 0.6% | 1983 |
| Davis County | 139 | 28.8% | 70.5% | 0.7% | 1996 |
| Summit County | 138 | 14.5% | 81.2% | 4.3% | 1982 |
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 Utah 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 Utah County, both outside Utah so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside UT (271 bridges here).
- Morgan County, AL · 271 bridges
- Yolo County, CA · 271 bridges
- Yazoo County, MS · 271 bridges
- Hall County, NE · 271 bridges
Similar average build year
Nearest mean year-built outside UT (1995 here).
- Williamson County, TX · avg 1995 · 1,170 bridges
- Craighead County, AR · avg 1995 · 442 bridges
- DeSoto County, MS · avg 1995 · 266 bridges
- Scotland County, MO · avg 1995 · 201 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Good-condition bridges (101)
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.