Bridge conditions in Washington County, Colorado
76 inventoried bridges · 3 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 76 bridges in Washington County: 14 rated good, 59 fair, and 3 poor.
- 3 of the 76 bridges in Washington County, Colorado, are rated in poor condition (3.9%) in the 2025 National Bridge Inventory, as of .
- 14 bridges (18.4%) are rated good and 59 (77.6%) fair.
- The median Washington County bridge was built in 1985.
- The busiest poor-rated bridge is US 36 Ml over Vega Creek (built 1938), carrying about 700 vehicles a day.
Good 18.4% · Fair 77.6% · Poor 3.9% of 76 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 36 Ml over Vega Creek | 1938 | 700 | Poor |
| County Road R over N. Fork Arikaree River | 1995 | 10 | Poor |
| County Road GG over Hell Creek | 1985 | 8 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 76 Ml Wbnd over County Road Q | 1964 | 5,500 | Fair |
| I 76 Ml Ebnd over County Road Q | 1964 | 5,500 | Fair |
| US 34 Ml over Camp Creek | 2000 | 3,300 | Good |
| US 34 Ml over Draw | 2006 | 3,100 | Good |
| US 34 Ml over Surveyor Creek | 1935 | 2,900 | Fair |
| US 6 Ml over Prewitt Res Intake Canal | 1941 | 1,100 | Fair |
| US 6 Ml over South Platte Ditch | 1926 | 1,000 | Good |
| US 6 Ml over Prewitt Outlet Canal | 1941 | 1,000 | Fair |
| SH 71 Ml over Beaver Creek | 1956 | 880 | Fair |
| SH 71 Ml over W Fk Plum Bush Creek | 1956 | 880 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Colorado: Colorado bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.