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)

Jo Cnty Rd 85

Poor

Over: Rock Creek

11 Mi. N.W. Of Buffalo, Johnson, WY

Built 1976 Load: 31.0 t ADT: 55

Jo Cnty Rd 1

Poor

Over: Rock Creek

4 Mi N.E. Of Buffalo, Johnson, WY

Built 1994 Load: 32.4 t ADT: 165

I-25 SBL

Poor

Over: South Fork Powder River

Casper - Kaycee, Johnson, WY

Built 1960 Load: 35.9 t ADT: 1,439

Jo Cnty Rd 78

Structurally Deficient

Over: Middle Fork Powder River

11 Miles N. Of Barnum, Johnson, WY

Built 1989 Load: 10.8 t ADT: 13

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