Bridge conditions in Routt County, Colorado
97 inventoried bridges · 7 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Routt County tracks close to typical: 7 of its 97 inventoried bridges (7.2%) are rated poor, against a national rate of about 7%.
- 7 of the 97 bridges in Routt County, Colorado, are rated in poor condition (7.2%) in the 2025 National Bridge Inventory, as of .
- 42 bridges (43.3%) are rated good and 48 (49.5%) fair.
- The median Routt County bridge was built in 1986.
- The busiest poor-rated bridge is US 40 Ml over Shelton Ditch (built 1954), carrying about 6,400 vehicles a day.
Good 43.3% · Fair 49.5% · Poor 7.2% of 97 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 40 Ml over Shelton Ditch | 1954 | 6,400 | Poor |
| Poplar St (CR53) over Dry Creek | 1988 | 2,385 | Poor |
| SH 131 Ml over UP RR | 1935 | 2,200 | Poor |
| SH 131 Ml over Chimney Rock Creek | 1938 | 860 | Poor |
| County Road 56 over Elk River | 1972 | 204 | Poor |
| County Road 179 over Trout Creek | 1955 | 150 | Poor |
| County Road 129 over S.Fk Little Snake River | 1975 | 131 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 40 Ml over Fish Creek | 1980 | 28,000 | Fair |
| US 40 Ml over Mt Werner Road | 1980 | 23,000 | Fair |
| US 40 Ml over Walton Creek | 1990 | 9,200 | Fair |
| US 40 Ml over Shelton Ditch | 1954 | 6,400 | Poor |
| Fish Crk Falls Rd over Spring Creek | 1973 | 5,949 | Fair |
| US 40 Ml over E Fork Elk River | 2013 | 5,700 | Good |
| US 40 Ml over Sage Creek | 2015 | 5,100 | Good |
| US 40 Ml over Yampa River | 1989 | 5,100 | Good |
| US 40 Ml over N Fk Elk River | 1976 | 5,100 | Fair |
| 5th Street over Yampa River | 1989 | 4,967 | Good |
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.