Bridge conditions in Duchesne County, Utah
89 inventoried bridges · 6 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
6 of the 89 bridges the federal inventory lists in Duchesne County are rated poor; the rest split 18 good and 65 fair.
- 6 of the 89 bridges in Duchesne County, Utah, are rated in poor condition (6.7%) in the 2025 National Bridge Inventory, as of .
- 18 bridges (20.2%) are rated good and 65 (73.0%) fair.
- The median Duchesne County bridge was built in 1989.
- The busiest poor-rated bridge is SR-35 over Duchesne River (built 1967), carrying about 783 vehicles a day.
Good 20.2% · Fair 73.0% · Poor 6.7% of 89 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 |
|---|---|---|---|
| SR-35 over Duchesne River | 1967 | 783 | Poor |
| Irr Bia Rte 7 over Uintah River | 1963 | 100 | Poor |
| County Road over Duchesne River | 1942 | 63 | Poor |
| Boys Ranch Rd over Lake Fork Overflow Chan. | 1999 | 63 | Poor |
| Sundown Ridge Rd. over Current Creek | 1999 | 63 | Poor |
| County Road over Duchesne River | 1952 | 25 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US-40 (SR-40) over Cottonwood Creek | 2011 | 15,115 | Fair |
| US-40 (SR-40) over Dry Gulch Creek | 2001 | 9,291 | Fair |
| US-40 (SR-40) over Duchesne River | 1996 | 7,815 | Fair |
| US-40 (SR-40) over Dry Gulch Canal | 1958 | 7,815 | Fair |
| US-40 (SR-40) over Strawberry River | 1971 | 7,358 | Fair |
| US-40 (SR-40) over Bridgeland-myton Wash | 1954 | 6,810 | Fair |
| US-40 (SR-40) over Sand Wash | 1959 | 6,791 | Fair |
| US-40 (SR-40) over Red Creek | 1959 | 6,791 | Fair |
| US-40 (SR-40) over Grey Mountain Canal | 1963 | 6,332 | Fair |
| US-40 (SR-40) over Strawberry River | 1963 | 6,332 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Utah: Utah 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.