Total bridges
53
Public highway bridges in Morgan County
County profile · official public datasets
Morgan County, UT
53 public highway bridges tracked in the FHWA National Bridge Inventory: 0% rated Good, 96.2% Fair, 3.8% Poor.
- 53
- Public bridges
- 0%
- Good condition
- 3.8%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Morgan County pairs a higher-than-median Poor-condition share among rated counties in the state with an older average build year than the state inventory.
- 21st
- of 29 on Poor share
- 3.8%
- Poor-condition share
- 53
- public highway bridges
- 1967
- 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.
Morgan County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Morgan County ranks #21 of 29 Utah counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 3.8%). Morgan County, Utah contains 53 public highway bridges. Roughly 0% are rated “Good,” 96.2% “Fair,” and 3.8% “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
0%
0 of 53 rated 7-9
Fair condition
96.2%
51 of 53 rated 5-6
Poor condition
3.8%
2 of 53 rated 4 or below
In-state Poor-share rank
#21 of 29
Among Utah counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 53 NBI-tracked bridges by lowest applicable component rating.
Good 0% (0)
Fair 96.2% (51)
Poor 3.8% (2)
Morgan County's Poor-condition bridges carry 36,437 vehicle crossings a day
That is 6.8% of the county's reported daily bridge traffic on 3.8% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. 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 52 of 53 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
84.9% of Morgan County's bridges have passed the 50-year mark
45 of the 53 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 0% 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 65.4% of the county's Poor-condition bridge traffic
I-84 (SR-84) WBL over WEBER RIVER AND UPRR, built 1965, carries 23,828 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 36,437 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Morgan County's bridges were built
53 bridges with a recorded construction year, grouped by decade
- 1920s 2
1920–1929
2 bridges
- 1930s 3
1930–1939
3 bridges
- 1950s 4
1950–1959
4 bridges
- 1960s
1960–1969
34 bridges
- 1970s 2
1970–1979
2 bridges
- 2000s 6
2000–2009
6 bridges
- 2010s 2
2010–2019
2 bridges
What this shows Construction peaked in the 1960s, when 34 of the county's bridges still in the inventory were built, which is 64.2% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year is 1967, 17 years older than the Utah average of 1984.
How Morgan County compares with Utah's closest counties by inventory size
The 5 Utah counties nearest Morgan County in number of bridges, with their condition splits. Its 3.8% Poor share is the 6th-lowest of these 6. Its average build year of 1967 against a peer-group mean of 1979 is 12 years older.
Showing the 5 closest of 28 Utah counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Iron County | 70 | 10% | 88.6% | 1.4% | 1977 |
| Juab County | 60 | 8.3% | 88.3% | 3.3% | 1980 |
| Beaver County | 53 | 17% | 79.2% | 3.8% | 1977 |
| Morgan County (this page) | 53 | 0% | 96.2% | 3.8% | 1967 |
| Sanpete County | 52 | 30.8% | 69.2% | 0% | 1986 |
| San Juan County | 50 | 24% | 74% | 2% | 1974 |
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 Morgan 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 Morgan County, both outside Utah so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside UT (53 bridges here).
- Cleburne County, AR · 53 bridges
- Citrus County, FL · 53 bridges
- Lumpkin County, GA · 53 bridges
- Stewart County, GA · 53 bridges
Similar average build year
Nearest mean year-built outside UT (1967 here).
- Los Angeles County, CA · avg 1967 · 3,547 bridges
- Allegheny County, PA · avg 1967 · 1,294 bridges
- Sonoma County, CA · avg 1967 · 609 bridges
- Merced County, CA · avg 1967 · 528 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (53)
I-84 (SR-84)
FairOver: DRY CREEK
IN MOUNTAIN GREEN, Morgan, UT
Built 2005 Load: 73.2 t ADT: 16,887
I-84 (SR-84)
PoorOver: WEBER RIVER
1.2 MI.EAST TAGGART INT., Morgan, UT
Built 1967 Load: 30.5 t ADT: 12,609
I-84 (SR-84) WBL
PoorOver: WEBER RIVER AND UPRR
BELOW UP&L RESERVOIR, Morgan, UT
Built 1965 Load: 40.2 t ADT: 23,828
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.