Wyoming bridge conditions
3,138 inventoried bridges · 224 rated poor · county by county
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 224 of Wyoming's 3,138 inventoried bridges are rated in poor condition (7.1%) in the 2025 National Bridge Inventory, as of .
- 895 bridges (28.5%) are rated good and 2,019 (64.3%) fair.
- The national poor rate is about 6.7%; Wyoming is above it (see all states ranked).
- The busiest poor-rated bridge in the state is US 89 over Flat Creek in Teton County, carrying about 15,780 vehicles a day.
By the measure that matters most - the most traffic on a poor rating - it is US 89 over Flat Creek in Teton County, built 1938, carrying about 15,780 vehicles a day. That is a repair-priority flag, not a collapse warning: what a poor rating does and does not mean. See the worst bridge in every state.
Good 28.5% · Fair 64.3% · Poor 7.1% of 3,138 bridges
Bridge conditions by county
Sorted by the number of poor-rated bridges. Click any county for its full bridge list.
| County | Bridges | Rated poor | Poor % |
|---|---|---|---|
| Laramie County | 255 | 28 | 11.0% |
| Carbon County | 206 | 19 | 9.2% |
| Converse County | 136 | 19 | 14.0% |
| Uinta County | 132 | 16 | 12.1% |
| Teton County | 122 | 15 | 12.3% |
| Platte County | 159 | 15 | 9.4% |
| Sweetwater County | 191 | 14 | 7.3% |
| Fremont County | 176 | 11 | 6.2% |
| Sublette County | 110 | 11 | 10.0% |
| Big Horn County | 91 | 9 | 9.9% |
| Sheridan County | 170 | 9 | 5.3% |
| Park County | 187 | 7 | 3.7% |
| Johnson County | 204 | 7 | 3.4% |
| Lincoln County | 129 | 7 | 5.4% |
| Washakie County | 60 | 6 | 10.0% |
| Goshen County | 106 | 5 | 4.7% |
| Natrona County | 135 | 5 | 3.7% |
| Weston County | 43 | 5 | 11.6% |
| Crook County | 176 | 4 | 2.3% |
| Albany County | 125 | 4 | 3.2% |
| Campbell County | 152 | 4 | 2.6% |
| Hot Springs County | 39 | 3 | 7.7% |
| Niobrara County | 34 | 1 | 2.9% |
The 25 busiest poor-rated bridges in Wyoming
Frequently asked questions
How many bridges in Wyoming are in poor condition?
224 of Wyoming's 3,138 inventoried highway bridges are rated in poor condition (7.1%) in the 2025 National Bridge Inventory. 'Poor' is FHWA's classification for a bridge whose deck, superstructure, or substructure is rated 4 or lower on the 0-9 scale; it was formerly called 'structurally deficient'.
Are the poor-rated bridges in Wyoming safe to drive on?
A poor rating flags advanced deterioration that needs repair or close monitoring; it does not by itself mean a bridge is unsafe. Bridges judged unsafe are closed or restricted to lighter loads by the owner. Inspections continue on all open bridges, generally at least every 24 months under the National Bridge Inspection Standards.
Source: FHWA National Bridge Inventory, 2025 vintage, reported by the Wyoming DOT.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.