County profile · official public datasets

Sublette County, WY

109 public highway bridges tracked in the FHWA National Bridge Inventory: 40.4% rated Good, 50.5% Fair, 9.2% Poor.

109
Public bridges: 40.4%
Good condition: 9.2%
Poor condition

The verdict

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

Sublette 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.

18th
of 23 on Poor share: 9.2%
Poor-condition share: 109
public highway bridges: 1986
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.

Sublette County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Sublette County ranks #18 of 23 Wyoming counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 9.2%). Sublette County, Wyoming contains 109 public highway bridges. Roughly 40.4% are rated “Good,” 50.5% “Fair,” and 9.2% “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

109

Public highway bridges in Sublette County

Good condition

40.4%

44 of 109 rated 7-9

Fair condition

50.5%

55 of 109 rated 5-6

Poor condition

9.2%

10 of 109 rated 4 or below

In-state Poor-share rank

#18 of 23

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

Condition distribution

Share of 109 NBI-tracked bridges by lowest applicable component rating.

Good

40.4% (44)

Fair

50.5% (55)

Poor

9.2% (10)

Sublette County's Poor-condition bridges carry 4,033 vehicle crossings a day

That is 3.4% of the county's reported daily bridge traffic on 9.2% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 403 crossings a day against 932 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 109 of 109 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

34.9% of Sublette County's bridges have passed the 50-year mark

38 of the 109 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 40.4% 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 60.6% of the county's Poor-condition bridge traffic

US 191 over Hoback River, built 1965, carries 2,444 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 10-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 4,033 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1940s

3
1950s

14
1960s

15
1970s

10
1980s

17
1990s

18
2000s

8
2010s

14
2020s

10

What this shows Construction peaked in the 1990s, when 18 of the county's bridges still in the inventory were built, which is 16.5% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year is 1986, 10 years newer than the Wyoming average of 1976.

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

The 5 Wyoming counties nearest Sublette County in number of bridges, with their condition splits. Its 9.2% Poor share is the 5th-lowest of these 6. Its average build year of 1986 against a peer-group mean of 1977 is 9 years newer.

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

Bridge inventory size and condition shares for Sublette County and the 5 Wyoming counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Lincoln County	129	31.8%	62.8%	5.4%	1985
Albany County	124	33.1%	65.3%	1.6%	1976
Teton County	119	31.9%	55.5%	12.6%	1978
Sublette County (this page)	109	40.4%	50.5%	9.2%	1986
Goshen County	106	19.8%	76.4%	3.8%	1974
Big Horn County	91	25.3%	67%	7.7%	1972

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

Similar inventory size

Nearest county inventories outside WY (109 bridges here).

Mariposa County, CA · 109 bridges
Boone County, IL · 109 bridges
Gove County, KS · 109 bridges
Hodgeman County, KS · 109 bridges

Similar average build year

Nearest mean year-built outside WY (1986 here).

El Paso County, TX · avg 1986 · 783 bridges
Caddo County, LA · avg 1986 · 682 bridges
Weld County, CO · avg 1986 · 614 bridges
Polk County, IA · avg 1986 · 545 bridges

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

All 109 Good 44 Fair 55 Poor 10

All bridges (109)

Sort:

Sublette County Bridge Snapshot

Condition distribution

Sublette County's Poor-condition bridges carry 4,033 vehicle crossings a day

34.9% of Sublette County's bridges have passed the 50-year mark

One structure carries 60.6% of the county's Poor-condition bridge traffic

How Sublette 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

All bridges (109)

4113: DUTCH JOE RO

370650

FDR 740

FOREST ROAD 10046

FR 10170

FOREST ROAD 10389

US 189

US 189

FOREST ROAD 10104

FOREST ROAD 30530

WYO 353

WYO 353

US 191

WYO 354

US 189

US 189

US 191

US 189

US 191

FOREST ROAD 10046

US 191

Sb Cnty Rd 132

US 191

Sb Cnty Rd 139

US 191

Sb Cnty Rd 125

US 191

US 191

US 191

Sb Cnty Rd 144

Sb Cnty Rd 123

Sb Cnty Rd 123

US 189

US 189

US 191

US 191

US 189

Sb Cnty Rd 222

US 191

US 191

US 189

US 191

US 191

US 189

Sb Cnty Rd 162

WYO 351

US 189

FOREST ROAD 10156

Sb Cnty Rd 118

Sb Cnty Rd 120

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