County profile · official public datasets

Cache County, UT

95 public highway bridges tracked in the FHWA National Bridge Inventory: 21.1% rated Good, 72.6% Fair, 6.3% Poor.

95
Public bridges: 21.1%
Good condition: 6.3%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Cache 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.

27th
of 29 on Poor share: 6.3%
Poor-condition share: 95
public highway bridges: 1975
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.

Cache County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Cache County ranks #27 of 29 Utah counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 6.3%). Cache County, Utah contains 95 public highway bridges. Roughly 21.1% are rated “Good,” 72.6% “Fair,” and 6.3% “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 Cache County

Good condition

21.1%

20 of 95 rated 7-9

Fair condition

72.6%

69 of 95 rated 5-6

Poor condition

6.3%

6 of 95 rated 4 or below

In-state Poor-share rank

#27 of 29

Among Utah counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 95 NBI-tracked bridges by lowest applicable component rating.

Good

21.1% (20)

Fair

72.6% (69)

Poor

6.3% (6)

Cache County's Poor-condition bridges carry 10,428 vehicle crossings a day

That is 2.8% of the county's reported daily bridge traffic on 6.3% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 1,738 crossings a day against 3,926 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 95 of 95 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

51.6% of Cache County's bridges have passed the 50-year mark

49 of the 95 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 21.1% 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 78.2% of the county's Poor-condition bridge traffic

LOGAN CITY STREET over LOGAN RIVER, built 1983, carries 8,155 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 6-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 10,428 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1910s

1
1920s

3
1930s

8
1940s

4
1950s

17
1960s

13
1970s

6
1980s

8
1990s

11
2000s

11
2010s

12
2020s

1

What this shows Construction peaked in the 1950s, when 17 of the county's bridges still in the inventory were built, which is 17.9% of those with a recorded year. That cohort is now 65 to 74 years old in the 2024 inventory. Its average build year is 1975, 9 years older than the Utah average of 1984.

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

The 5 Utah counties nearest Cache County in number of bridges, with their condition splits. Its 6.3% Poor share is the 6th-lowest of these 6. Its average build year of 1975 against a peer-group mean of 1980 is 5 years older.

Showing the 5 closest of 28 Utah counties eligible for comparison.

Bridge inventory size and condition shares for Cache County and the 5 Utah counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Cache County (this page)	95	21.1%	72.6%	6.3%	1975
Garfield County	94	22.3%	74.5%	3.2%	1977
Uintah County	91	31.9%	64.8%	3.3%	1989
Duchesne County	84	26.2%	67.9%	6%	1984
Carbon County	73	19.2%	78.1%	2.7%	1974
Millard County	72	12.5%	86.1%	1.4%	1978

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 Cache 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 Cache County, both outside Utah so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside UT (95 bridges here).

Pike County, AR · 95 bridges
Camden County, GA · 95 bridges
Liberty County, GA · 95 bridges
Fulton County, KY · 95 bridges

Similar average build year

Nearest mean year-built outside UT (1975 here).

San Bernardino County, CA · avg 1975 · 1,422 bridges
Lane County, OR · avg 1975 · 1,010 bridges
Fulton County, GA · avg 1975 · 775 bridges
Westmoreland County, PA · avg 1975 · 620 bridges

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 95 Good 20 Fair 69 Poor 6

All bridges (95)

Sort:

Cache County Bridge Snapshot

Condition distribution

Cache County's Poor-condition bridges carry 10,428 vehicle crossings a day

51.6% of Cache County's bridges have passed the 50-year mark

One structure carries 78.2% of the county's Poor-condition bridge traffic

How Cache 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 (95)

US-89 (SR-89)

100 NO. ST. LOGAN

ROAD 20040

SR-30

ROAD 20026

ROAD 20004

500 NO. ST. LOGAN

300 South

600 NO. ST. LOGAN

SR-61

SR-142

300 W. ST. LOGAN

600 E. and 800 N.

COUNTY ROAD

1400 NORTH STREET

200 NORTH STREET

ROAD 20155

SR-142

SR-30

1000 SOUTH ST.

CITY STREET

600 SOUTH STREET

100 SOUTH

COUNTY ROAD

YOUNGWARD ROAD

SR-101

COUNTY ROAD FA538

SR-101

CANYON ROAD

ROAD 20158

400 EAST STREET

1700 S. COUNTY RD.

US-91 (SR-91)

US-89 (SR-89)

MERIDIAN ROAD

1700 SOUTH

8700 SOUTH STREET

SR-101

SR-101

SR-252 1000 W.St.

100 W. ST. LOGAN

COUNTY ROAD

800 E (Old SR 237)

US-89 (SR-89)

COUNTY ROAD

COUNTY ROAD

SR-23

COUNTY ROAD

SR-218

SR-23

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