County profile · official public datasets

Teton County, WY

119 public highway bridges tracked in the FHWA National Bridge Inventory: 31.9% rated Good, 55.5% Fair, 12.6% Poor.

119
Public bridges: 31.9%
Good condition: 12.6%
Poor condition

The verdict

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

Teton County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.

22nd
of 23 on Poor share: 12.6%
Poor-condition share: 119
public highway bridges: 1978
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.

Teton County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Teton County ranks #22 of 23 Wyoming counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 12.6%). Teton County, Wyoming contains 119 public highway bridges. Roughly 31.9% are rated “Good,” 55.5% “Fair,” and 12.6% “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

119

Public highway bridges in Teton County

Good condition

31.9%

38 of 119 rated 7-9

Fair condition

55.5%

66 of 119 rated 5-6

Poor condition

12.6%

15 of 119 rated 4 or below

In-state Poor-share rank

#22 of 23

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

Condition distribution

Share of 119 NBI-tracked bridges by lowest applicable component rating.

Good

31.9% (38)

Fair

55.5% (66)

Poor

12.6% (15)

Teton County's Poor-condition bridges carry 66,930 vehicle crossings a day

That is 18.9% of the county's reported daily bridge traffic on 12.6% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 4,462 crossings a day against 2,237 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 119 of 119 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

52.1% of Teton County's bridges have passed the 50-year mark

62 of the 119 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 31.9% 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 28.7% of the county's Poor-condition bridge traffic

WYO 22 over Snake River, built 1960, carries 19,219 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 15-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 66,930 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1910s

2
1920s

1
1930s

12
1940s

1
1950s

10
1960s

26
1970s

13
1980s

11
1990s

7
2000s

15
2010s

16
2020s

5

What this shows Construction peaked in the 1960s, when 26 of the county's bridges still in the inventory were built, which is 21.8% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1978) matches the Wyoming average (1976).

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

The 5 Wyoming counties nearest Teton County in number of bridges, with their condition splits. Its 12.6% Poor share is the 6th-lowest of these 6. Its average build year of 1978 against a peer-group mean of 1979 is in line with the group.

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

Bridge inventory size and condition shares for Teton County and the 5 Wyoming counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Uinta County	132	18.9%	69.7%	11.4%	1976
Lincoln County	129	31.8%	62.8%	5.4%	1985
Albany County	124	33.1%	65.3%	1.6%	1976
Teton County (this page)	119	31.9%	55.5%	12.6%	1978
Sublette County	109	40.4%	50.5%	9.2%	1986
Goshen County	106	19.8%	76.4%	3.8%	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 Teton 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 Teton County, both outside Wyoming so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside WY (119 bridges here).

Carroll County, AR · 119 bridges
Grant County, AR · 119 bridges
Stafford County, KS · 119 bridges
Grayson County, KY · 119 bridges

Similar average build year

Nearest mean year-built outside WY (1978 here).

Orange County, CA · avg 1978 · 1,164 bridges
Sumner County, KS · avg 1978 · 659 bridges
Allen County, IN · avg 1978 · 613 bridges
Livingston County, IL · avg 1978 · 579 bridges

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

All 119 Good 38 Fair 66 Poor 15

All bridges (119)

Sort:

Teton County Bridge Snapshot

Condition distribution

Teton County's Poor-condition bridges carry 66,930 vehicle crossings a day

52.1% of Teton County's bridges have passed the 50-year mark

One structure carries 28.7% of the county's Poor-condition bridge traffic

How Teton 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 (119)

30220

FOREST ROAD 30400

NO DATA ENTERED

FIREHOLE LAKE DRIV

CAMPGROUND ROAD

MORMON ROW

CAMPGROUND ROAD

GRAND LOOP ROAD

U.S. ROUTE 89

FOREST ROAD 30519

TETON PARK ROAD

FOREST ROAD 30100

NO DATA ENTERED

FOREST ROAD 30520

GRASSY LAKE ROAD

BAILY CREEK ROAD

GRAND LOOP ROAD

SOUTH ENTRANCE ROA

ROAD 5

TETON FOREST ACCES

U.S. ROUTE 89

CAMPGROUND ROAD

FOREST ROAD 30100

U.S. ROUTE 89

U.S. ROUTE 89

GRAND LOOP ROAD

TETON PARK ROAD

GRAND LOOP ROAD

U.S. ROUTE 89

FIREHOLE LAKE DRIV

FOREST ROAD 30400

GRAND LOOP ROAD

GRAND LOOP ROAD

FOREST ROAD 30010

Cache Creek Drive

Te Cnty Rd 5

WYO 22

US 89

Te Cnty Rd 15

Te Cnty Rd 16

OLD FAITHFUL INTER

U.S. ROUTE 89

CLIMBERS RANCH ROA

High School Road

Te Cnty Rd 3

EAST ENTRANCE ROAD

US 89

U.S. ROUTE 89

LUPINE MEADOWS ROA

US 89

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