Big Horn County, WY

93 public highway bridges

Big Horn County Bridge Snapshot

Big Horn County, Wyoming contains 93 public highway bridges in the FHWA National Bridge Inventory. Roughly 24.7% are rated “Good,” 65.6% “Fair,” 7.5% “Poor,” and 7.5% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in WY are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

93

Total Bridges

24.7%

Good

7.5%

Poor

7.5%

Structurally Deficient

Condition Distribution

Good

24.7% (23)

Fair

65.6% (61)

Poor

7.5% (7)

SD

7.5% (7)

All Bridges (93)

Sort:

BNSF Railway

Over: Lane 42C

In Town Of Basin, Big Horn, WY

Built 1950 ADT: 207

BNSF Railway

Over: Bh County Road R3C

3 Miles East Of Deaver, Big Horn, WY

Built 2019 ADT: 150

Bh Cnty Rd 229

Over: Elk Creek

5 Mi. S. Of Basin, Big Horn, WY

Built 1940 Load: 14.5 t ADT: 339

FDR 349

Over: N. PAINTROCK CREEK

3.1 MI EAST OF USFSRD 352, Big Horn, WY

Built 1992 Load: 14.9 t ADT: 10

WYO 32

Over: Coon Creek

Lovell - Emblem, Big Horn, WY

Built 1954 Load: 18.3 t ADT: 346

Bh Cnty Rd R52

Over: Medicine Lodge Creek

Medicine Lodge State Park, Big Horn, WY

Built 1980 Load: 18.3 t ADT: 227

WYO 30

Over: McKenney Creek

Basin - Jct US 14/16/20, Big Horn, WY

Built 1960 Load: 18.6 t ADT: 933

WYO 31

Over: Alkali Creek

Manderson - Hyattville, Big Horn, WY

Built 1948 Load: 20.6 t ADT: 216

WYO 31

Over: Nowood River

Manderson - Hyattville, Big Horn, WY

Built 1952 Load: 20.9 t ADT: 486

WYO 32

Over: Foster Gulch

Lovell - Emblem, Big Horn, WY

Built 1954 Load: 20.9 t ADT: 346

Bh Cnty Rd L42C

Over: Big Horn River

Basin, Big Horn, WY

Built 1958 Load: 20.9 t ADT: 207

WYO 32

Over: Sand Creek

Lovell - Emblem, Big Horn, WY

Built 1954 Load: 21.2 t ADT: 346

WYO 32

Over: Whistle Creek

Lovell - Emblem, Big Horn, WY

Built 1957 Load: 22.5 t ADT: 346

WYO 31

Over: Nowood River

Manderson - Hyattville, Big Horn, WY

Built 1951 Load: 22.9 t ADT: 679

Bh Cnty Rd R43H

Over: Paint Rock Creek

T49N R090W S19, Big Horn, WY

Built 1962 Load: 22.9 t ADT: 337

WYO 31

Over: Nowood River

Manderson - Hyattville, Big Horn, WY

Built 1952 Load: 23.2 t ADT: 486

WYO 31

Over: Medicine Lodge Creek

Manderson - Hyattville, Big Horn, WY

Built 1948 Load: 23.2 t ADT: 216

US 310

Over: Little Dry Creek

Jct WYO 310 - Lovell, Big Horn, WY

Built 1957 Load: 23.5 t ADT: 2,255

US 16

Over: Big Horn Canal

Worland - Basin, Big Horn, WY

Built 1957 Load: 25.4 t ADT: 2,122

WYO 35

Over: Sage Creek

Jct Us310 WY 789 - South, Big Horn, WY

Built 1947 Load: 25.4 t ADT: 2,058

US 16

Over: BNSF Railway

Worland - Basin, Big Horn, WY

Built 1979 Load: 25.4 t ADT: 1,998

Bh Cnty Rd R16D

Over: Greybull River

1.5 Miles South Of Otto, Big Horn, WY

Built 1978 Load: 26.3 t ADT: 164

US 16

Over: Big Horn River

Worland - Basin, Big Horn, WY

Built 1978 Load: 27.2 t ADT: 1,339

US 310

Over: Shoshone River

Lovell - Deaver, Big Horn, WY

Built 1965 Load: 28.8 t ADT: 4,191

US 14A

Over: Yellowtail Reservoir

Lovell - Burgess Jct, Big Horn, WY

Built 1971 Load: 29.9 t ADT: 810

Bh Cnty Rd R4

Over: Sidon Canal

3 Miles East Of Deaver, Big Horn, WY

Built 1950 Load: 31.0 t ADT: 117

Bh Cnty Rd 268

Over: Medicine Lodge Creek

1 Mile N.E. Of Hyatville, Big Horn, WY

Built 1970 Load: 31.1 t ADT: 188

US 14

Over: Red Gulch

Greybull - Burgess Jct, Big Horn, WY

Built 1971 Load: 31.8 t ADT: 824

Bh Cnty Rd 268

Over: Medicine Lodge Creek

3 Miles Ne. Of Hyattville, Big Horn, WY

Built 1977 Load: 31.8 t ADT: 188

Bh Cnty Rd 5

Over: Shoshone River

Byron, Big Horn, WY

Built 1977 Load: 32.4 t ADT: 146

US 16

Over: Dobie Creek

Worland - Basin, Big Horn, WY

Built 1957 Load: 32.7 t ADT: 2,122

US 16

Over: Antelope Creek

Worland - Basin, Big Horn, WY

Built 1957 Load: 32.7 t ADT: 2,122

US 16

Over: Greybull River

Basin - Greybull, Big Horn, WY

Built 1955 Load: 32.7 t ADT: 3,295

US 14

Over: Shell Creek

Greybull - Burgess Jct, Big Horn, WY

Built 1966 Load: 32.7 t ADT: 511

WYO 32

Over: Coon Creek

Lovell - Emblem, Big Horn, WY

Built 1971 Load: 32.7 t ADT: 729

WYO 32

Over: Dry Creek

Lovell - Emblem, Big Horn, WY

Built 1966 Load: 32.7 t ADT: 729

Bh Cnty Rd R43

Over: Trapper Creek

3.5 Miles Se Of Shell, Big Horn, WY

Built 1965 Load: 32.7 t ADT: 117

Bh Cnty Rd 229

Over: Antelope Creek

2 Miles S. Of Basin, Big Horn, WY

Built 1926 Load: 32.7 t ADT: 339

BAD PASS ROAD

Over: CROOKED CREEK

FROM N.P. VISITOR CENTER,, Big Horn, WY

Built 1971 Load: 33.6 t ADT: 60

US 310

Over: Sage Creek

Lovell - Deaver, Big Horn, WY

Built 1973 Load: 33.6 t ADT: 1,834

Bh Cnty Rd 3

Over: Sage Creek

2.5 Miles E. Of Deaver, Big Horn, WY

Built 1955 Load: 33.6 t ADT: 150

Bh Cnty Rd R49

Over: S Fork Paint Rock Creek

Hyattville, Big Horn, WY

Built 1983 Load: 33.6 t ADT: 144

Bh Cnty Rd 199

Over: Shell Creek

6 Mi. E. Of Greybull, Big Horn, WY

Built 1985 Load: 33.9 t ADT: 127

US 16

Over: Elk Creek

Worland - Basin, Big Horn, WY

Built 1992 Load: 34.5 t ADT: 2,122

Bh Cnty Rd R5D

Over: Greybull River

Lanes 40 41, Big Horn, WY

Built 1994 Load: 36.3 t ADT: 74

US 14

Over: BNSF Railway

Greybull - Jct WYO 310, Big Horn, WY

Built 1961 Load: 37.2 t ADT: 5,063

WYO 37

Over: Shoshone River

Jct Us 14A - North, Big Horn, WY

Built 1962 Load: 37.2 t ADT: 717

US 14A

Over: Sidon Canal

Garland-Byron, Big Horn, WY

Built 1984 Load: 39.0 t ADT: 1,887

WYO 32

Over: Whistle Creek

Lovell - Emblem, Big Horn, WY

Built 1982 Load: 39.9 t ADT: 729

Bh Cnty Rd R9B

Over: Foster Gulch

2 Miles W.S.W. Of Lovell, Big Horn, WY

Built 1986 Load: 39.9 t ADT: 276

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

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 5, 2026