County profile · official public datasets

Fremont County, WY

177 public highway bridges tracked in the FHWA National Bridge Inventory: 47.5% rated Good, 46.3% Fair, 6.2% Poor.

177
Public bridges: 47.5%
Good condition: 6.2%
Poor condition

The verdict

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

Fremont County pairs a higher-than-median Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

12th
of 23 on Poor share: 6.2%
Poor-condition share: 177
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.

Fremont County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Fremont County ranks #12 of 23 Wyoming counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 6.2%). Fremont County, Wyoming contains 177 public highway bridges. Roughly 47.5% are rated “Good,” 46.3% “Fair,” and 6.2% “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

177

Public highway bridges in Fremont County

Good condition

47.5%

84 of 177 rated 7-9

Fair condition

46.3%

82 of 177 rated 5-6

Poor condition

6.2%

11 of 177 rated 4 or below

In-state Poor-share rank

#12 of 23

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

Condition distribution

Share of 177 NBI-tracked bridges by lowest applicable component rating.

Good

47.5% (84)

Fair

46.3% (82)

Poor

6.2% (11)

Fremont County's Poor-condition bridges carry 990 vehicle crossings a day

That is 0.4% of the county's reported daily bridge traffic on 6.2% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 90 crossings a day against 1,016 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 177 of 177 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

33.3% of Fremont County's bridges have passed the 50-year mark

59 of the 177 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 47.5% 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 26.4% of the county's Poor-condition bridge traffic

Fr Cnty Rd 480 over Pilot Canal, built 1950, carries 261 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 11-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 990 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1920s

5
1930s

7
1940s

3
1950s

15
1960s

14
1970s

37
1980s

39
1990s

19
2000s

18
2010s

19
2020s

1

What this shows Construction peaked in the 1980s, when 39 of the county's bridges still in the inventory were built, which is 22% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year is 1981, 5 years newer than the Wyoming average of 1976.

How Fremont County compares with Wyoming's closest counties by inventory size

The 5 Wyoming counties nearest Fremont County in number of bridges, with their condition splits. Its 6.2% Poor share is the 4th-lowest of these 6. Its average build year of 1981 against a peer-group mean of 1975 is 6 years newer.

Showing the 5 closest of 22 Wyoming counties eligible for comparison.

Bridge inventory size and condition shares for Fremont County and the 5 Wyoming counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Sweetwater County	191	28.8%	62.8%	8.4%	1976
Park County	187	37.4%	58.3%	4.3%	1979
Fremont County (this page)	177	47.5%	46.3%	6.2%	1981
Crook County	176	30.7%	67.6%	1.7%	1974
Sheridan County	170	23.5%	71.8%	4.7%	1975
Platte County	160	31.3%	60%	8.8%	1970

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

Similar inventory size

Nearest county inventories outside WY (177 bridges here).

Hale County, AL · 177 bridges
Macon County, AL · 177 bridges
Washington County, AL · 177 bridges
Seminole County, FL · 177 bridges

Similar average build year

Nearest mean year-built outside WY (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.

All 177 Good 84 Fair 82 Poor 11

Good-condition bridges (84)

Sort:

Fremont County Bridge Snapshot

Condition distribution

Fremont County's Poor-condition bridges carry 990 vehicle crossings a day

33.3% of Fremont County's bridges have passed the 50-year mark

One structure carries 26.4% of the county's Poor-condition bridge traffic

How Fremont County compares with Wyoming's closest counties by inventory size

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

Good-condition bridges (84)

FDR

FDR

FDR

FDR

FDR

FSR 532

US 287

2302: HUDSON-ATLAN

US 20

US 287

US 26

Fr Cnty Rd 315

WYO 131

Fr Cnty Rd 298

Fr Cnty Rd 345

FDR

Fr Cnty Rd 235

Fr Cnty Rd 16

Fr Cnty Rd 209

Fr Cnty Rd 5

Tnl Hill Rd Realgn

IRR BIA RTE 5

IRR BIA RTE 32

537

US 287

US 287

WYO 789

US 287

US 26

US 26

US 26

Fr Cnty Rd 404

WYO 134

WYO 136

Fr Cnty Rd 54

US 287

WYO 28

Fr Cnty Rd 335

Fr Cnty Rd 431

Fr Cnty Rd 431

US 26

Fr Cnty Rd 430

US 26

Fr Cnty Rd 64

IRR BIA RTE 101

IRR BIA RTE 140

US 287

US 287

US 287

US 287

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