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-25 SBL

Fair

Over: Machinery Pass

Kaycee - Buffalo, Johnson, WY

Built 1968 Load: 28.1 t ADT: 1,770

I-90 EBL

Fair

Over: Machinery Pass

Buffalo - Gillette, Johnson, WY

Built 1961 Load: 28.1 t ADT: 2,110

I-90 WBL

Fair

Over: Machinery Pass

Buffalo - Gillette, Johnson, WY

Built 1961 Load: 28.1 t ADT: 2,033

I-25 NBL

Fair

Over: Machinery Pass

Buffalo Marginal, Johnson, WY

Built 1963 Load: 28.4 t ADT: 2,029

I-25 SBL

Fair

Over: Machinery Pass

Buffalo Marginal, Johnson, WY

Built 1963 Load: 28.4 t ADT: 1,717

I-25 NBL

Fair

Over: Machinery Pass

Casper - Kaycee, Johnson, WY

Built 1965 Load: 29.0 t ADT: 1,499

I-25 SBL

Fair

Over: Machinery Pass

Casper - Kaycee, Johnson, WY

Built 1965 Load: 29.0 t ADT: 1,439

I-90 WBL

Fair

Over: East Fork Dry Creek

Buffalo - Gillette, Johnson, WY

Built 1960 Load: 29.0 t ADT: 2,000

I-90 EBL

Fair

Over: Piney Creek

Sheridan - Buffalo, Johnson, WY

Built 1966 Load: 29.9 t ADT: 3,577

I-90 WBL

Fair

Over: Piney Creek

Sheridan - Buffalo, Johnson, WY

Built 1966 Load: 29.9 t ADT: 3,758

I-25 NBL

Fair

Over: Middle Fork Powder River

Kaycee Marginal, Johnson, WY

Built 1970 Load: 30.4 t ADT: 1,573

I-25 SBL

Fair

Over: Middle Fork Powder River

Kaycee Marginal, Johnson, WY

Built 1970 Load: 30.4 t ADT: 1,472

I-25 NBL

Fair

Over: Machinery Pass

Kaycee - Buffalo, Johnson, WY

Built 1968 Load: 30.8 t ADT: 1,758

I-25 SBL

Fair

Over: Machinery Pass

Kaycee - Buffalo, Johnson, WY

Built 1968 Load: 30.8 t ADT: 1,571

I-25 NBL

Fair

Over: Machinery Pass

Kaycee - Buffalo, Johnson, WY

Built 1968 Load: 30.8 t ADT: 1,967

I-90 EBL

Fair

Over: Lake Desmet Ditch

Sheridan - Buffalo, Johnson, WY

Built 1966 Load: 30.8 t ADT: 3,577

I-90 WBL

Fair

Over: Lake Desmet Ditch

Sheridan - Buffalo, Johnson, WY

Built 1966 Load: 30.8 t ADT: 3,758

I-90 EBL

Fair

Over: East Fork Dry Creek

Buffalo - Gillette, Johnson, WY

Built 1960 Load: 30.8 t ADT: 2,080

FDR 28

Fair

Over: N.FORK CRAZY WOMAN CREEK

1.2 MI NORTH OF HWY 16, Johnson, WY

Built 1977 Load: 31.1 t ADT: 10

I-90 EBL

Fair

Over: Powder River

Buffalo - Gillette, Johnson, WY

Built 1961 Load: 31.7 t ADT: 1,820

I-90 WBL

Fair

Over: Powder River

Buffalo - Gillette, Johnson, WY

Built 1961 Load: 31.7 t ADT: 1,833

I-25 SBL

Fair

Over: North Fork Powder River

Kaycee - Buffalo, Johnson, WY

Built 1971 Load: 32.0 t ADT: 1,472

WYO 387

Fair

Over: Meadow Creek

Midwest - Reno Jct, Johnson, WY

Built 1975 Load: 32.7 t ADT: 1,672

Jo Cnty Rd 132

Fair

Over: Clear Creek

Buffalo, Johnson, WY

Built 1976 Load: 32.7 t ADT: 97

Jo Cnty Rd 252

Fair

Over: Clear Creek

Buffalo, Johnson, WY

Built 1955 Load: 32.7 t ADT: 2,576

Lowr Powder Rvr Rd

Fair

Over: Juniper Draw

South Of I-90, Johnson, WY

Built 1960 Load: 32.7 t ADT: 89

WYO 192

Fair

Over: 15 Mile Draw

10 Miles S.E. Of Kaycee, Johnson, WY

Built 1992 Load: 32.7 t ADT: 229

I-25 NBL

Fair

Over: French Creek

Buffalo Marginal, Johnson, WY

Built 1963 Load: 32.7 t ADT: 2,029

I-25 SBL

Fair

Over: French Creek

Buffalo Marginal, Johnson, WY

Built 1963 Load: 32.7 t ADT: 1,717

I-25 NBL

Fair

Over: M Fork Crazy Woman Creek

Kaycee - Buffalo, Johnson, WY

Built 1968 Load: 33.0 t ADT: 1,573

I-90 EBL

Fair

Over: Clear Creek

Buffalo Marginal, Johnson, WY

Built 1959 Load: 33.6 t ADT: 2,127

I-90 WBL

Fair

Over: Clear Creek

Buffalo Marginal, Johnson, WY

Built 1959 Load: 33.6 t ADT: 2,077

Jo Cnty Rd 40

Fair

Over: Clear Creek

3 Miles N.,E. Of Buffalo, Johnson, WY

Built 1986 Load: 33.6 t ADT: 89

WYO 196

Fair

Over: Muddy Creek

Kaycee-Buffalo, Johnson, WY

Built 1989 Load: 33.6 t ADT: 51

WYO 196

Fair

Over: N F Crazy Woman Creek

Kaycee-Buffalo, Johnson, WY

Built 1989 Load: 33.6 t ADT: 51

Jo Cnty Rd 204B

Fair

Over: Powder River

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

Built 1983 Load: 34.5 t ADT: 31

Jo Cnty Rd 51

Fair

Over: Murphy Creek

13 Miles S. Of Kaycee, Johnson, WY

Built 1983 Load: 34.5 t ADT: 53

Jo Cnty Rd 266

Fair

Over: North Fork Powder River

1/4 Mile W. Of Mayowrth, Johnson, WY

Built 1992 Load: 34.5 t ADT: 97

Jo Cnty Rd 13

Fair

Over: Crazy Woman Creek

8 Miles South Of Buffalo, Johnson, WY

Built 1983 Load: 35.4 t ADT: 75

I-25 NBL

Fair

Over: South Fork Powder River

Casper - Kaycee, Johnson, WY

Built 1960 Load: 35.6 t ADT: 1,499

WYO 387

Fair

Over: JJ Draw

Midwest - Reno Jct, Johnson, WY

Built 1978 Load: 36.3 t ADT: 1,784

US 16

Fair

Over: Watt Draw

Buffalo-Ucross, Johnson, WY

Built 1986 Load: 36.3 t ADT: 378

I-90 / US 87 Bus

Fair

Over: French Creek

Buffalo, Main Street, Johnson, WY

Built 1955 Load: 37.2 t ADT: 1,438

I-90 EBL

Fair

Over: Dead Horse Creek

Buffalo - Gillette, Johnson, WY

Built 1962 Load: 37.2 t ADT: 1,823

I-90 WBL

Fair

Over: Dead Horse Creek

Buffalo - Gillette, Johnson, WY

Built 1962 Load: 37.2 t ADT: 1,833

WYO 192

Fair

Over: Powder River

Kaycee - Jct WYO 387, Johnson, WY

Built 1959 Load: 37.2 t ADT: 116

I-25 NBL

Fair

Over: Murphy Creek

Casper - Kaycee, Johnson, WY

Built 1960 Load: 38.5 t ADT: 1,499

I-25 SBL

Fair

Over: Murphy Creek

Casper - Kaycee, Johnson, WY

Built 1960 Load: 38.9 t ADT: 1,439

WYO 196

Fair

Over: Bull Creek

Kaycee-Buffalo, Johnson, WY

Built 1989 Load: 39.9 t ADT: 395

I-25 / US 87 Bus

Fair

Over: Clear Creek

Buffalo Main Street, Johnson, WY

Built 1975 Load: 40.8 t ADT: 5,720

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