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.

When Fremont County's bridges were built

177 bridges with a recorded construction year, grouped by decade

bridges

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.

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

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 Poor
Sweetwater County 191 8.4%
Park County 187 4.3%
Fremont County (this page) 177 6.2%
Crook County 176 1.7%
Sheridan County 170 4.7%
Platte County 160 8.8%

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).

Similar average build year

Nearest mean year-built outside WY (1981 here).

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

All bridges (177)

FDR

Good

Over: S. FK. WM. SPRINGS CREEK

NO DATA ENTERED, Fremont, WY

Built 1983 Load: 38.6 t ADT: 50

Mickel Drive

Good

Over: Big Wind River

T41N R107W S01, Fremont, WY

Built 1988 Load: 39.0 t ADT: 136

WYO 132

Good

Over: Little Wind River

Ethete-Kinnear, Fremont, WY

Built 1990 Load: 39.9 t ADT: 1,005

SWEETWATER BRIDGE

Good

Over: SWEETWATER RIVER

28 mi SE of Lander WY, Fremont, WY

Built 2018 Load: 40.5 t ADT: 100

Fr Cnty Rd 20

Good

Over: Popo Agie River

Mortimore Lane, Fremont, WY

Built 2012 Load: 42.3 t ADT: 426

WYO 132

Good

Over: Mill Creek

Ethete South, Fremont, WY

Built 2015 Load: 42.4 t ADT: 2,012

Fr Cnty Rd 283A

Good

Over: Big Wind River

2 M. W. Of Dwntn Dubois, Fremont, WY

Built 1998 Load: 47.2 t ADT: 411

S 2nd Street

Good

Over: M Fork Popo Agie River

Lander Streets, Fremont, WY

Built 2004 Load: 50.8 t ADT: 1,790

NO DATA ENTERED

Good

Over: WARM SPRING CREEK

NO DATA ENTERED, Fremont, WY

Built 2017 Load: 53.1 t ADT: 50

IRR BIA RTE 78

Good

Over: LITTLE WIND RIVER

2 KM SW OF ARAPAHOE SCHOO, Fremont, WY

Built 2010 Load: 54.5 t ADT: 1,500

NO DATA ENTERED

Good

Over: SOUTH FORK WARM SPRINGS

30 MILES SW OF DUBOIS WY, Fremont, WY

Built 2002 Load: 54.8 t ADT: 50

WYO 131

Good

Over: Hornecker Creek

Sinks Canyon Road, Fremont, WY

Built 2004 Load: 56.2 t ADT: 1,226

WYO 132

Good

Over: Wind River

Ethete-Kinnear, Fremont, WY

Built 2007 Load: 57.2 t ADT: 1,005

IRR BIA RTE 140

Good

Over: DRY CREEK

11 KM NE OF JCT 23 & 140, Fremont, WY

Built 1996 Load: 61.8 t ADT: 20

NO DATA ENTERED

Good

Over: SHERIDAN CREEK

NO DATA ENTERED, Fremont, WY

Built 2011 Load: 61.9 t ADT: 50

NO DATA ENTERED

Good

Over: ROCK CREEK

NO DATA ENTERED, Fremont, WY

Built 2009 Load: 66.1 t ADT: 100

Fr Cnty Rd 523

Poor

Over: Twin Creek

15 Mi. S.E. Of Lander, Fremont, WY

Built 1932 Load: 0.0 t ADT: 8

Fr Cnty Rd 442

Poor

Over: Middle Fork Popo Agie

5 Mi Sw Of Lander, Fremont, WY

Built 1950 Load: 10.0 t ADT: 77

Fr Cnty Rd 298

Poor

Over: Wind River

32 Mi. N.W. Of Riverton, Fremont, WY

Built 1925 Load: 11.4 t ADT: 26

Fr Cnty Rd 314

Poor

Over: Big Wind River

20 Mi Se Of Dubois, Fremont, WY

Built 1920 Load: 15.7 t ADT: 39

Bull Lake Road

Poor

Over: Bull Lake Dam Spillway

36 mi W-NW of Riverton, Fremont, WY

Built 1938 Load: 17.1 t ADT: 5

Fr Cnty Rd 497

Poor

Over: Haymaker Draw

2.5 Miles Ne Of Riverton, Fremont, WY

Built 1921 Load: 17.2 t ADT: 139

IRR BIA RTE 101

Poor

Over: SHOTGUN CREEK

15.3 KM SE OF MAIL CAMP, Fremont, WY

Built 1951 Load: 20.2 t ADT: 30

Fr Cnty Rd 412

Poor

Over: Pilot Canal

3 Miles E. Of Kinnear, Fremont, WY

Built 1970 Load: 24.5 t ADT: 149

Fr Cnty Rd 277

Poor

Over: Wiggins F E Wind River

T41N R105W S04, Fremont, WY

Built 1930 Load: 25.0 t ADT: 129

Fr Cnty Rd 480

Poor

Over: Pilot Canal

Kinnear - North, Fremont, WY

Built 1950 Load: 28.1 t ADT: 261

Fr Cnty Rd 476

Poor

Over: Pilot Canal

10 Mi N.W. Of Riverton, Fremont, WY

Built 1970 Load: 31.5 t ADT: 127

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

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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.