Total bridges
91
Public highway bridges in Big Horn County
County profile · official public datasets
Big Horn County, WY
91 public highway bridges tracked in the FHWA National Bridge Inventory: 25.3% rated Good, 67% Fair, 7.7% Poor.
- 91
- Public bridges
- 25.3%
- Good condition
- 7.7%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Big Horn County posts a higher-than-median Poor-condition share among rated counties in the state across rated county bridge inventory.
- 14th
- of 23 on Poor share
- 7.7%
- Poor-condition share
- 91
- public highway bridges
- 1972
- 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.
Big Horn County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Big Horn County ranks #14 of 23 Wyoming counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 7.7%). Big Horn County, Wyoming contains 91 public highway bridges. Roughly 25.3% are rated “Good,” 67% “Fair,” and 7.7% “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.
Good condition
25.3%
23 of 91 rated 7-9
Fair condition
67%
61 of 91 rated 5-6
Poor condition
7.7%
7 of 91 rated 4 or below
In-state Poor-share rank
#14 of 23
Among Wyoming counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 91 NBI-tracked bridges by lowest applicable component rating.
Good 25.3% (23)
Fair 67% (61)
Poor 7.7% (7)
Big Horn County's Poor-condition bridges carry 2,112 vehicle crossings a day
That is 2.6% of the county's reported daily bridge traffic on 7.7% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 302 crossings a day against 920 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 91 of 91 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
54.9% of Big Horn County's bridges have passed the 50-year mark
50 of the 91 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 25.3% 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 73.7% of the county's Poor-condition bridge traffic
US 14A over Sand Draw, built 1975, carries 1,557 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 7-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 2,112 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Big Horn County's bridges were built
91 bridges with a recorded construction year, grouped by decade
- 1920s 2
1920–1929
2 bridges
- 1930s 1
1930–1939
1 bridges
- 1940s 5
1940–1949
5 bridges
- 1950s
1950–1959
19 bridges
- 1960s
1960–1969
14 bridges
- 1970s
1970–1979
16 bridges
- 1980s
1980–1989
15 bridges
- 1990s
1990–1999
9 bridges
- 2000s 7
2000–2009
7 bridges
- 2010s 3
2010–2019
3 bridges
What this shows Construction peaked in the 1950s, when 19 of the county's bridges still in the inventory were built, which is 20.9% of those with a recorded year. That cohort is now 65 to 74 years old in the 2024 inventory. Its average build year (1972) matches the Wyoming average (1976).
How Big Horn County compares with Wyoming's closest counties by inventory size
The 5 Wyoming counties nearest Big Horn County in number of bridges, with their condition splits. Its 7.7% Poor share is the 3rd-lowest of these 6. Its average build year of 1972 against a peer-group mean of 1979 is 7 years older.
Showing the 5 closest of 22 Wyoming counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Albany County | 124 | 33.1% | 65.3% | 1.6% | 1976 |
| Teton County | 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 |
| Big Horn County (this page) | 91 | 25.3% | 67% | 7.7% | 1972 |
| Washakie County | 61 | 41% | 49.2% | 9.8% | 1979 |
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 Big Horn 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 Big Horn County, both outside Wyoming so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside WY (91 bridges here).
- Baxter County, AR · 91 bridges
- Breckinridge County, KY · 91 bridges
- Reynolds County, MO · 91 bridges
- Dawes County, NE · 91 bridges
Similar average build year
Nearest mean year-built outside WY (1972 here).
- Santa Clara County, CA · avg 1972 · 964 bridges
- Madison County, AL · avg 1972 · 710 bridges
- Kern County, CA · avg 1972 · 668 bridges
- York County, PA · avg 1972 · 569 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (91)
WYO 30
FairOver: Greybull River
Basin - Jct 14/16/20, Big Horn, WY
Built 2001 Load: 43.5 t ADT: 868
Bh Cnty Rd R1C
FairOver: Polecat Creek
0.5 Miles S. Of Deaver, Big Horn, WY
Built 1979 Load: 46.3 t ADT: 85
Bh Cnty Rd R8C
FairOver: Greybull River
3.5 Mi. S. Of Burlington, Big Horn, WY
Built 1980 Load: 48.1 t ADT: 134
State Park Road
FairOver: Medicine Lodge Creek
Medicine Lodge State Park, Big Horn, WY
Built 1981 Load: 49.0 t ADT: 33
US 14A
FairOver: Sidon Canal
Garland-Byron, Big Horn, WY
Built 1984 Load: 50.8 t ADT: 1,887
Bh Cnty Rd 57
FairOver: Unnamed Draw
10 M Se Jct 789 C Rd 55, Big Horn, WY
Built 1970 Load: 51.7 t ADT: 9
US 14
FairOver: Dry Creek
Cody - Jct WYO 310, Big Horn, WY
Built 1968 Load: 59.0 t ADT: 1,783
US 16
FairOver: East Tensleep Creek
Buffalo-Tensleep Road, Big Horn, WY
Built 1987 Load: 61.7 t ADT: 797
US 16
FairOver: BNSF Railway
Basin-Greybull, Big Horn, WY
Built 2005 Load: 78.0 t ADT: 3,295
Bh Cnty Rd R5C
FairOver: Farmers Canal
12 Miles West Of Otto, Big Horn, WY
Built 1994 Load: 89.8 t ADT: 20
Bh Cnty Rd R2C
FairOver: Whistle Creek
8 Miles S.W. Of Byron, Big Horn, WY
Built 1994 Load: 99.9 t ADT: 18
WYO 433
GoodOver: Five Mile Creek
Worland - Manderson, Big Horn, WY
Built 1961 Load: 24.5 t ADT: 764
WYO 32
GoodOver: Lovell Canal
Lovell - Emblem, Big Horn, WY
Built 1957 Load: 25.4 t ADT: 346
US 310
GoodOver: Sidon Canal
Lovell - Deaver, Big Horn, WY
Built 1971 Load: 31.8 t ADT: 1,834
Bh Cnty Rd 85
GoodOver: Shell Creek
3 Miles W. Of Shell, Big Horn, WY
Built 1968 Load: 31.8 t ADT: 144
FDR 17
GoodOver: SHELL CREEK
2.7 MI ON FDR 17, Big Horn, WY
Built 1948 Load: 32.1 t ADT: 45
US 14
GoodOver: Dry Creek
Greybull - Jct WYO 310, Big Horn, WY
Built 1961 Load: 32.7 t ADT: 5,063
Bh Cnty Rd R9A
GoodOver: Sage Creek
2 Miles W. Of Lovell, Big Horn, WY
Built 1986 Load: 32.7 t ADT: 187
US 16
GoodOver: Big Horn Canal
Basin-Manderson, Big Horn, WY
Built 1956 Load: 32.7 t ADT: 2,122
US 310
GoodOver: East Fork Sand Draw
Greybull-Lovell, Big Horn, WY
Built 1963 Load: 32.7 t ADT: 1,207
Bh Cnty Rd R27
GoodOver: Shell Creek
2 Miles N. Of Greybull, Big Horn, WY
Built 1995 Load: 32.7 t ADT: 117
Bh Cnty Rd R49
GoodOver: N Fork Paint Rock Creek
Hyattville, Big Horn, WY
Built 1983 Load: 33.6 t ADT: 144
FDR 27
GoodOver: WEST TENSLEEP CREEK
6.3 MI NORTH OF HWY 16, Big Horn, WY
Built 1966 Load: 34.0 t ADT: 10
WYO 433
GoodOver: Unnamed Draw
Worland - Manderson, Big Horn, WY
Built 2015 Load: 34.7 t ADT: 1,383
FSR 27
GoodOver: WEST TENSLEEP CREEK
0.1 MI N OF HWY 16, Big Horn, WY
Built 2002 Load: 35.3 t ADT: 291
Bh Cnty Rd R5B
GoodOver: Coon Creek
T56N R97W S34, Big Horn, WY
Built 1994 Load: 39.6 t ADT: 144
US 14
GoodOver: Alkali Draw
Greybull - Burgess Jct, Big Horn, WY
Built 2003 Load: 41.7 t ADT: 824
Bh Cnty Rd L23
GoodOver: Whistle Creek
15 Mi Sw Of Lovell, Big Horn, WY
Built 2005 Load: 41.7 t ADT: 117
US 310
GoodOver: BNSF Railway
Lovell - Deaver, Big Horn, WY
Built 2019 Load: 43.1 t ADT: 2,230
US 14
GoodOver: Potato Draw
Greybull - Burgess Jct, Big Horn, WY
Built 2003 Load: 46.3 t ADT: 824
US 310
GoodOver: Sage Creek
Lovell - Deaver, Big Horn, WY
Built 2019 Load: 46.3 t ADT: 2,230
US 14
GoodOver: Shell Creek
Greybull-Burgess Jct Road, Big Horn, WY
Built 1991 Load: 53.5 t ADT: 511
US 14
GoodOver: Shell Creek
Greybull-Burgess Jct Road, Big Horn, WY
Built 1991 Load: 55.3 t ADT: 511
Bh Cnty Rd R39
GoodOver: Shell Creek
Big Horn County, Big Horn, WY
Built 2005 Load: 55.3 t ADT: 122
Bh Cnty Rd L32H
PoorOver: Red Gulch
3 Miles W. Of Shell, Big Horn, WY
Built 1950 Load: 6.2 t ADT: 81
Bh Cnty Rd L55
PoorOver: Big Horn River
6 Miles S. Of Manderson, Big Horn, WY
Built 1930 Load: 18.3 t ADT: 87
Bh Cnty Rd 72
PoorOver: Shoshone River
2 Miles West Of Lovell, Big Horn, WY
Built 1926 Load: 20.2 t ADT: 117
Bh Cnty Rd L31
PoorOver: Shell Creek
0.5 Miles N. Of Shell, Big Horn, WY
Built 1950 Load: 23.2 t ADT: 31
Bh Cnty Rd 196
PoorOver: Unnamed Draw
3 Miles East Of Greybull, Big Horn, WY
Built 1983 Load: 29.8 t ADT: 51
Bh Cnty Rd 268
PoorOver: Medicine Lodge Creek
T50N R089W S31, Big Horn, WY
Built 1970 Load: 31.0 t ADT: 188
US 14A
PoorOver: Sand Draw
Lovell - Burgess Jct, Big Horn, WY
Built 1975 Load: 33.6 t ADT: 1,557
Read our methodology - how this data is sourced, computed, and verified.
Related
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.