County profile · official public datasets

Park County, WY

187 public highway bridges tracked in the FHWA National Bridge Inventory: 37.4% rated Good, 58.3% Fair, 4.3% Poor.

187
Public bridges
37.4%
Good condition
4.3%
Poor condition

The verdict

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

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

Top 30%
lowest Poor share in state
4.3%
Poor-condition share
187
public highway bridges
1979
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.

Park County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Park County ranks #7 of 23 Wyoming counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 4.3%). Park County, Wyoming contains 187 public highway bridges. Roughly 37.4% are rated “Good,” 58.3% “Fair,” and 4.3% “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

187

Public highway bridges in Park County

Good condition

37.4%

70 of 187 rated 7-9

Fair condition

58.3%

109 of 187 rated 5-6

Poor condition

4.3%

8 of 187 rated 4 or below

In-state Poor-share rank

#7 of 23

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

Condition distribution

Share of 187 NBI-tracked bridges by lowest applicable component rating.

Good
37.4% (70)
Fair
58.3% (109)
Poor
4.3% (8)

Park County's Poor-condition bridges carry 5,934 vehicle crossings a day

That is 2.2% of the county's reported daily bridge traffic on 4.3% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 742 crossings a day against 1,133 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 187 of 187 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

50.3% of Park County's bridges have passed the 50-year mark

94 of the 187 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 37.4% 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 33.4% of the county's Poor-condition bridge traffic

NORTHEAST ENTRANCE over YELLOWSTONE RIVER, built 1961, carries 1,982 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 8-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 5,934 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Park County's bridges were built

187 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1960s, when 42 of the county's bridges still in the inventory were built, which is 22.5% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1979) matches the Wyoming average (1976).

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

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

The 5 Wyoming counties nearest Park County in number of bridges, with their condition splits. Its 4.3% Poor share is the 3rd-lowest of these 6. Its average build year of 1979 against a peer-group mean of 1975 is in line with the group.

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

Bridge inventory size and condition shares for Park County and the 5 Wyoming counties closest to it in inventory size
County Bridges Poor
Johnson County 204 2.9%
Sweetwater County 191 8.4%
Park County (this page) 187 4.3%
Fremont County 177 6.2%
Crook County 176 1.7%
Sheridan County 170 4.7%

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

Similar inventory size

Nearest county inventories outside WY (187 bridges here).

Similar average build year

Nearest mean year-built outside WY (1979 here).

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

All 187 Good 70 Fair 109 Poor 8

All bridges (187)

Pa Cnty Rd L9B

Good

Over: Alkali Creek

6 Miles NW of Ralston, Park, WY

Built 1983 Load: 36.0 t ADT: 128

US 14A

Good

Over: Sage Creek

Cody - Powell, Park, WY

Built 2014 Load: 37.9 t ADT: 7,149

BEARTOOTH HIGHWAY

Good

Over: BEARTOOTH CREEK

26.7 MI. EAST OF NE ENTRA, Park, WY

Built 2011 Load: 39.9 t ADT: 1,175

Pa Cnty Rd L10HB

Good

Over: Roan Wash

4 Miles S.E. Of Garland, Park, WY

Built 1989 Load: 40.5 t ADT: 128

Game and Fish 7GQ

Good

Over: Sunlight Creek

27.8 Miles NW of Cody, Park, WY

Built 1993 Load: 40.5 t ADT: 128

GRAND LOOP ROAD

Good

Over: GARDNER RIVER

8.1 MI. SOUTH OF MAMMOTH, Park, WY

Built 2015 Load: 40.8 t ADT: 1,807

US 14

Good

Over: Clocktower Creek

Yellowstone Park - Cody, Park, WY

Built 1998 Load: 40.8 t ADT: 3,071

WYO 290

Good

Over: Wood River

Meeteetse-Pitchfork, Park, WY

Built 2004 Load: 40.8 t ADT: 511

US 14

Good

Over: Libby Creek

Yellowstone Park-Cody, Park, WY

Built 1996 Load: 41.7 t ADT: 2,487

BEARTOOTH HIGHWAY

Good

Over: BEARTOOTH RAVINE

8.4 MILES EAST OF ROUTE 2, Park, WY

Built 2023 Load: 42.1 t ADT: 4,800

Pa Cnty Rd 6WX

Good

Over: S Fork Shoshone River

30 mi. SW of Cody, Park, WY

Built 2020 Load: 42.4 t ADT: 177

US 14

Good

Over: 50 Mile Creek

Yellowstone Park-Cody, Park, WY

Built 1996 Load: 42.6 t ADT: 2,487

Pa Cnty Rd 6BU

Good

Over: N Fork Shoshone River

24 Miles West Of Cody, Park, WY

Built 2014 Load: 42.8 t ADT: 128

US 14

Good

Over: Dry Creek

Cody - Jct WYO 310, Park, WY

Built 1960 Load: 43.5 t ADT: 1,369

US 14

Good

Over: Grinnell Creek

Yellowstone Park-Cody, Park, WY

Built 1996 Load: 44.5 t ADT: 2,487

Pa Cnty Rd 13A

Good

Over: Garland Canal

Cody - Powell, Park, WY

Built 2005 Load: 44.7 t ADT: 128

BEARTOOTH HIGHWAY

Good

Over: LITTLE BEAR CREEK

28.6 MI. EAST OF NE ENTRA, Park, WY

Built 2010 Load: 46.3 t ADT: 1,775

Pa Cnty Rd 6OS

Good

Over: Cody Canal

Apx 12 Miles SW of Cody, Park, WY

Built 2019 Load: 46.3 t ADT: 78

Pa Cnty Rd YXD

Good

Over: S Fork Shoshone River

34 Mi Sw Of Cody, Park, WY

Built 2009 Load: 48.1 t ADT: 128

US 14

Good

Over: N Fork Shoshone River

33 Mi West Of Cody, Park, WY

Built 2001 Load: 51.7 t ADT: 2,487

Pa Cnty Rd R10A

Good

Over: Garland Canal

1 Mile West Of Powell, Park, WY

Built 1990 Load: 51.7 t ADT: 1,757

US 14

Good

Over: Mormon Creek

Yellowstone Park-Cody, Park, WY

Built 1996 Load: 56.2 t ADT: 2,487

BEARTOOTH HIGHWAY

Good

Over: LONG LAKE OUTLET

31.6 MI. EAST OF NE ENTRA, Park, WY

Built 2014 Load: 59.9 t ADT: 1,775

US 14

Good

Over: Goff Creek

Yellowstone Park-Cody, Park, WY

Built 1996 Load: 63.3 t ADT: 2,487

US 14

Good

Over: N Fork Shoshone River

33 Mi West Of Cody, Park, WY

Built 2001 Load: 63.5 t ADT: 2,487

Pa Cnty Rd L9

Good

Over: Frannie Canal

3 Miles West Of Powell, Park, WY

Built 2004 Load: 64.4 t ADT: 978

BEARTOOTH HIGHWAY

Good

Over: LITTLE BEAR CREEK

29.6 MILES EAST OF NE PAR, Park, WY

Built 2018 Load: 67.1 t ADT: 1,775

EAST ENTRANCE ROAD

Good

Over: PELICAN CREEK

1.6 MI. EAST OF LAKE JCT., Park, WY

Built 2020 Load: 67.1 t ADT: 1,543

US 14

Good

Over: Moss Creek

31 Mi. West Of Cody, Park, WY

Built 2000 Load: 73.3 t ADT: 2,487

FDR

Poor

Over: LITTLE ROCK CREEK

37 MILES NW OF CODY WY, Park, WY

Built 1976 Load: 10.0 t ADT: 50

NORTHEAST ENTRANCE

Poor

Over: YELLOWSTONE RIVER

0.64 MI. EAST OF TOWER JC, Park, WY

Built 1961 Load: 19.0 t ADT: 1,982

Hayden Arch Road

Poor

Over: Shoshone River

4.5 mi W-SW of Cody WY, Park, WY

Built 1924 Load: 23.4 t ADT: 100

Pa Cnty Rd L9A

Poor

Over: Bitter Creek

3.75 Mi. S.E. Of Garland, Park, WY

Built 1937 Load: 23.6 t ADT: 1,488

Pa Cnty Rd 1WAW

Poor

Over: Polecat Creek

Approx 6 Mi N. Of Garland, Park, WY

Built 1970 Load: 24.5 t ADT: 128

Pa Cnty Rd R6A

Poor

Over: Bitter Creek

3 Miles N.E. Of Powell, Park, WY

Built 1966 Load: 25.2 t ADT: 327

GRAND LOOP ROAD

Poor

Over: RAVINE

4.5 MI. SOUTH OF MAMMOTH, Park, WY

Built 1977 Load: 27.2 t ADT: 1,807

Pa Cnty Rd 3XQ

Poor

Over: Greybull River

23 Miles Ne. Of Meeteetse, Park, WY

Built 1955 Load: 29.9 t ADT: 52

Read our methodology - how this data is sourced, computed, and verified.

Related

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.