County profile · official public datasets

Campbell County, WY

152 public highway bridges tracked in the FHWA National Bridge Inventory: 25.7% rated Good, 71.7% Fair, 2.6% Poor.

152
Public bridges: 25.7%
Good condition: 2.6%
Poor condition

The verdict

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

Campbell County posts a top-quartile lowest Poor-condition share among rated counties in the state across mid-size county bridge inventory.

Top 13%
lowest Poor share in state: 2.6%
Poor-condition share: 152
public highway bridges: 1980
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.

Campbell County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Campbell County ranks #3 of 23 Wyoming counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 2.6%). Campbell County, Wyoming contains 152 public highway bridges. Roughly 25.7% are rated “Good,” 71.7% “Fair,” and 2.6% “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

152

Public highway bridges in Campbell County

Good condition

25.7%

39 of 152 rated 7-9

Fair condition

71.7%

109 of 152 rated 5-6

Poor condition

2.6%

4 of 152 rated 4 or below

In-state Poor-share rank

#3 of 23

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

Condition distribution

Share of 152 NBI-tracked bridges by lowest applicable component rating.

Good

25.7% (39)

Fair

71.7% (109)

Poor

2.6% (4)

Campbell County's Poor-condition bridges carry 9,156 vehicle crossings a day

That is 2.1% of the county's reported daily bridge traffic on 2.6% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 2,289 crossings a day against 3,494 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 152 of 152 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

36.2% of Campbell County's bridges have passed the 50-year mark

55 of the 152 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 25.7% 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 41.4% of the county's Poor-condition bridge traffic

I-90 EBL and WBL over BNSF / US 14/16, built 1972, carries 3,794 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 4-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 9,156 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1940s

1
1950s

15
1960s

19
1970s

50
1980s

33
1990s

9
2000s

14
2010s

9
2020s

2

What this shows Construction peaked in the 1970s, when 50 of the county's bridges still in the inventory were built, which is 32.9% of those with a recorded year. That cohort is now 45 to 54 years old in the 2024 inventory. Its average build year (1980) matches the Wyoming average (1976).

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

The 5 Wyoming counties nearest Campbell County in number of bridges, with their condition splits. Its 2.6% Poor share is the 1st-lowest of these 6. Its average build year of 1980 against a peer-group mean of 1974 is 6 years newer.

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

Bridge inventory size and condition shares for Campbell County and the 5 Wyoming counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Sheridan County	170	23.5%	71.8%	4.7%	1975
Platte County	160	31.3%	60%	8.8%	1970
Campbell County (this page)	152	25.7%	71.7%	2.6%	1980
Converse County	137	14.6%	72.3%	13.1%	1974
Natrona County	135	30.4%	65.2%	4.4%	1977
Uinta County	132	18.9%	69.7%	11.4%	1976

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

Similar inventory size

Nearest county inventories outside WY (152 bridges here).

Logan County, AR · 152 bridges
Kosciusko County, IN · 152 bridges
Muhlenberg County, KY · 152 bridges
Clinton County, MO · 152 bridges

Similar average build year

Nearest mean year-built outside WY (1980 here).

Tulsa County, OK · avg 1980 · 1,135 bridges
Miami-Dade County, FL · avg 1980 · 1,057 bridges
Pulaski County, AR · avg 1980 · 721 bridges
McLennan County, TX · avg 1980 · 714 bridges

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

All 152 Good 39 Fair 109 Poor 4

Fair-condition bridges (109)

Sort:

Campbell County Bridge Snapshot

Condition distribution

Campbell County's Poor-condition bridges carry 9,156 vehicle crossings a day

36.2% of Campbell County's bridges have passed the 50-year mark

One structure carries 41.4% of the county's Poor-condition bridge traffic

How Campbell 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

Fair-condition bridges (109)

WYO 51

Cl Cnty Rd 18

I-90 WBL

I-90 EBL

I-90 EBL

I-90 WBL

I-90 EBL

I-90 WBL

I-90 EBL

I-90 WBL

Cl Cnty Rd 12

Constitution Drive

American Lane

WYO 59

I-90 EBL

I-90 WBL

WYO 51

WYO 59

Cl Cnty Rd 1

I-90 WBL

I-90 WBL

US 14

I-90 EBL

WYO 59

WYO 51

El Camino Court

I-90 EBL

I-90 EBL

I-90 EBL

I-90 WBL

WYO 59

WYO 59

I-90 EBL

I-90 WBL

I-90 WBL

WYO 51

I-90 EBL

I-90 WBL

WYO 51

I-90 EBL

I-90 WBL

WYO 59

WYO 59

WYO 59

WYO 59

I-90 EBL and WBL

I-90 EBL

I-90 WBL

I-90 EBL and WBL

I-90 EBL Off Ramp

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