Johnson County, WY

204 public highway bridges

Johnson County Bridge Snapshot

Johnson County, Wyoming contains 204 public highway bridges in the FHWA National Bridge Inventory. Roughly 22.5% are rated “Good,” 46.1% “Fair,” 2.5% “Poor,” and 2.5% 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.

204
Total Bridges
22.5%
Good
2.5%
Poor
2.5%
Structurally Deficient

Condition Distribution

Good
22.5% (46)
Fair
46.1% (94)
Poor
2.5% (5)
SD
2.5% (5)

All Bridges (204)

I-90 EBL

Unknown

Over: Dry Creek Road

Buffalo - Gillette, Johnson, WY

Built 1961 ADT: 89

I-90 WBL

Unknown

Over: Dry Creek Road

Buffalo - Gillette, Johnson, WY

Built 1961 ADT: 89

I-90 EBL

Unknown

Over: Lower Powder River Road

Buffalo - Gillette, Johnson, WY

Built 1961 ADT: 97

I-90 WBL

Unknown

Over: Lower Powder River Road

Buffalo - Gillette, Johnson, WY

Built 1961 ADT: 97

I-90 EBL

Unknown

Over: Dead Horse Creek Road

Buffalo - Gillette, Johnson, WY

Built 1962 ADT: 97

I-90 WBL

Unknown

Over: Dead Horse Creek Road

Buffalo - Gillette, Johnson, WY

Built 1962 ADT: 97

I-90 WBL Off Ramp

Unknown

Over: I-25 - I-90 Ramp

Buffalo Marginal, Johnson, WY

Built 1964 ADT: 1,708

I-90 EBL

Unknown

Over: I-90 to I-25 Ramp

Buffalo Marginal, Johnson, WY

Built 1964 ADT: 130

I-90 WBL

Unknown

Over: Jo CR 1 (Rock Creek Rd)

Sheridan - Buffalo, Johnson, WY

Built 1963 ADT: 249

FSR 33

Fair

Over: CRAZY WOMAN CREEK

4.5 MI EAST OF HWY 16, Johnson, WY

Built 1961 ADT: 20

Jo Cnty Rd 78

Fair

Over: Red Wall Draw

6 Miles N. Of Barnum, Johnson, WY

Built 1930 Load: 7.3 t ADT: 13

FDR 33

Fair

Over: CRAZY WOMAN CREEK

1.7 MI EAST OF HWY 16, Johnson, WY

Built 1945 Load: 7.5 t ADT: 62

Jo Cnty Rd 212

Fair

Over: French Creek

Buffalo, Johnson, WY

Built 1950 Load: 8.9 t ADT: 390

FDR 394

Fair

Over: FOUR LAKES DITCH

3.0 MI W OF USFS RD 19, Johnson, WY

Built 1989 Load: 9.7 t ADT: 10

Jo Cnty Rd 204A

Fair

Over: Crazy Woman Creek

21 Miles S.E. Of Buffalo, Johnson, WY

Built 1950 Load: 14.1 t ADT: 97

FDR 33

Fair

Over: CRAZY WOMAN CREEK

4.1 MI EAST OF HWY 16, Johnson, WY

Built 1954 Load: 20.7 t ADT: 5

WYO 192

Fair

Over: Carpenter Creek

Kaycee - Jct WYO 387, Johnson, WY

Built 1956 Load: 21.2 t ADT: 116

I-25 Service Road

Fair

Over: South Fork Powder River

WYO 387 Jct - Buffalo, Johnson, WY

Built 1932 Load: 21.6 t ADT: 79

I-90 EBL

Fair

Over: Machinery Pass

Buffalo - Gillette, Johnson, WY

Built 1960 Load: 21.9 t ADT: 2,080

I-90 WBL

Fair

Over: Machinery Pass

Buffalo - Gillette, Johnson, WY

Built 1960 Load: 21.9 t ADT: 2,000

WYO 192

Fair

Over: Coal Creek

Kaycee - Jct WYO 387, Johnson, WY

Built 1956 Load: 22.5 t ADT: 116

WYO 196

Fair

Over: North Fork Powder River

Kaycee - Buffalo, Johnson, WY

Built 1935 Load: 22.7 t ADT: 309

Jo Cnty Rd 1

Fair

Over: Rock Creek

T51N R082W S15, Johnson, WY

Built 1954 Load: 22.9 t ADT: 249

I-25 NBL

Fair

Over: Machinery Pass

Kaycee - Buffalo, Johnson, WY

Built 1968 Load: 23.2 t ADT: 1,573

I-25 SBL

Fair

Over: Machinery Pass

Kaycee - Buffalo, Johnson, WY

Built 1968 Load: 23.2 t ADT: 1,472

I-90 EBL

Fair

Over: Machinery Pass

Buffalo - Gillette, Johnson, WY

Built 1961 Load: 23.2 t ADT: 2,077

I-90 WBL

Fair

Over: Machinery Pass

Buffalo - Gillette, Johnson, WY

Built 1961 Load: 23.2 t ADT: 2,020

WYO 192

Fair

Over: North Fork Powder River

Kaycee - Jct WYO 387, Johnson, WY

Built 1942 Load: 23.6 t ADT: 229

I-90 EBL

Fair

Over: Machinery Pass

Buffalo - Gillette, Johnson, WY

Built 1961 Load: 23.9 t ADT: 2,110

I-90 WBL

Fair

Over: Machinery Pass

Buffalo - Gillette, Johnson, WY

Built 1961 Load: 23.9 t ADT: 2,033

6214: BAR C ROAD

Fair

Over: MIDDLE FORK POWDER RIVER

4 miles S of Barnum, WY, Johnson, WY

Built 1976 Load: 24.0 t ADT: 30

I-90 EBL

Fair

Over: Machinery Pass

Buffalo - Gillette, Johnson, WY

Built 1961 Load: 24.5 t ADT: 2,077

I-90 WBL

Fair

Over: Machinery Pass

Buffalo - Gillette, Johnson, WY

Built 1961 Load: 24.5 t ADT: 2,020

I-25 NBL

Fair

Over: Machinery Pass

Casper - Kaycee, Johnson, WY

Built 1960 Load: 24.9 t ADT: 1,499

I-25 SBL

Fair

Over: Machinery Pass

Casper - Kaycee, Johnson, WY

Built 1960 Load: 24.9 t ADT: 1,439

I-90 EBL

Fair

Over: Machinery Pass

Buffalo - Gillette, Johnson, WY

Built 1962 Load: 25.1 t ADT: 1,823

I-90 WBL

Fair

Over: Machinery Pass

Buffalo - Gillette, Johnson, WY

Built 1962 Load: 25.1 t ADT: 1,833

I-90 EBL

Fair

Over: Machinery Pass

Sheridan - Buffalo, Johnson, WY

Built 1966 Load: 25.5 t ADT: 3,533

I-90 EBL

Fair

Over: Negro Creek

Buffalo - Gillette, Johnson, WY

Built 1960 Load: 25.5 t ADT: 2,127

I-90 WBL

Fair

Over: Negro Creek

Buffalo - Gillette, Johnson, WY

Built 1960 Load: 25.5 t ADT: 2,077

I-90 WBL

Fair

Over: Machinery Pass

Sheridan - Buffalo, Johnson, WY

Built 1966 Load: 25.8 t ADT: 3,700

Jo Cnty Rd 78

Fair

Over: Middle Fork Powder River

12 Mi. S.E. Of Kaycee, Johnson, WY

Built 1990 Load: 27.0 t ADT: 13

I-25 NBL

Fair

Over: Machinery Pass

Kaycee - Buffalo, Johnson, WY

Built 1968 Load: 27.2 t ADT: 1,573

I-25 SBL

Fair

Over: Machinery Pass

Kaycee - Buffalo, Johnson, WY

Built 1968 Load: 27.2 t ADT: 1,472

I-25 NBL

Fair

Over: Machinery Pass

Kaycee - Buffalo, Johnson, WY

Built 1968 Load: 27.2 t ADT: 1,573

I-25 SBL

Fair

Over: Machinery Pass

Kaycee - Buffalo, Johnson, WY

Built 1968 Load: 27.2 t ADT: 1,472

I-25 NBL

Fair

Over: Machinery Pass

Kaycee - Buffalo, Johnson, WY

Built 1971 Load: 27.2 t ADT: 1,967

I-25 NBL

Fair

Over: Machinery Pass

Kaycee - Buffalo, Johnson, WY

Built 1967 Load: 27.4 t ADT: 1,573

I-25 SBL

Fair

Over: Machinery Pass

Kaycee - Buffalo, Johnson, WY

Built 1967 Load: 27.4 t ADT: 1,472

FDR 31

Fair

Over: N FORK CRAZY WOMAN CREEK

9.5 MI N OF HWY 16, Johnson, WY

Built 1977 Load: 27.9 t ADT: 25

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

Related

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