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.

Total bridges

Public highway bridges in Morgan County

Good condition

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.

1920s

2
1930s

3
1950s

4
1960s

34
1970s

2
2000s

6
2010s

2

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.

Bridge inventory size and condition shares for Morgan County and the 5 Utah counties closest to it in inventory size
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 53 Good 0 Fair 51 Poor 2

All bridges (53)

Sort:

Morgan County Bridge Snapshot

Condition distribution

Morgan County's Poor-condition bridges carry 36,437 vehicle crossings a day

84.9% of Morgan County's bridges have passed the 50-year mark

One structure carries 65.4% of the county's Poor-condition bridge traffic

How Morgan County compares with Utah's closest counties by inventory size

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

All bridges (53)

SR-66

SR-65

SR-167

COUNTY ROAD

COUNTY ROAD

COUNTY ROAD

I-84 (SR-84) WBL

COUNTY ROAD

COUNTY ROAD

I-84 (SR-84)

I-84 (SR-84) EBL

I-84 (SR-84) WBL

I-84 (SR-84) WBL

I-84 (SR-84) EBL

MORGAN COUNTY ROAD

COUNTY ROAD

I-84 (SR-84) EBL

I-84 (SR-84) EBL

I-84 (SR-84) WBL

I-84 (SR-84) EBL

I-84 (SR-84) WBL

COUNTY ROAD

I-84 (SR-84) EBL

I-84 (SR-84) WBL

I-84 (SR-84) EBL

I-84 (SR-84) EBL

I-84 (SR-84) WBL

I-84 (SR-84) WBL

SR-66

I-84 (SR-84) EBL

I-84 (SR-84) WBL

I-84 (SR-84) EBL

I-84 (SR-84) EBL

I-84 (SR-84) EBL

I-84 (SR-84) WBL

I-84 (SR-84) WBL

I-84 (SR-84) WBL

SR-167

I-84 (SR-84) EBL

SR-66

200 EAST STREET

Stoddard Ln Cty Rd

COUNTY ROAD

COUNTY ROAD

I-84 (SR-84) EBL

I-84 (SR-84) WBL

COUNTY ROAD

I-84 (SR-84)

ROUND VALLEY ROAD

I-84 (SR-84)

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