County Road 39 over Colorado River
Grand County, Colorado · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- County Road 39 over Colorado River in Grand County, Colorado, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1953, making it 72 years old at the 2025 inventory.
- It carries about 86 vehicles a day (traffic count year 2023).
- Its listed owner is the county highway agency.
- It is one of 46 of the 88 inventoried bridges in Grand County rated fair (52.3%); 5 (5.7%) are rated poor.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (40.05369, -106.28964)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 6 | Satisfactory condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 120 ft |
| Location | 0.8 Mi So of US Hwy 40 |
| NBI structure number | 49003900.80009 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Colorado department of transportation.
Busiest bridges in Grand County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 40 Ml over UP RR | 1985 | 11,000 | Fair |
| US 40 Ml over Fraser River | 1985 | 11,000 | Fair |
| US 40 Ml over Vasquez Creek | 1938 | 11,000 | Fair |
| US 40 Ml over Crooked Creek | 1941 | 11,000 | Poor |
| US 40 Ml over Fraser River | 1942 | 11,000 | Fair |
| US 40 Ml over Pedestrian Underpass | 2004 | 11,000 | Good |
All bridges nearby: Grand County, CO bridge conditions · every bridge in Grand County · Colorado bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.