US 491 Ml over Cahone Creek
Dolores County, Colorado · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 491 Ml over Cahone Creek in Dolores County, Colorado, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1937 and reconstructed in 1960, making it 88 years old at the 2025 inventory.
- It carries about 3,200 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- It is one of 20 of the 27 inventoried bridges in Dolores County rated fair (74.1%); 3 (11.1%) 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 → (37.64893, -108.80829)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 5 | Fair condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 43 ft |
| Location | 24.6 Mi NW of Jct US 160 |
| NBI structure number | N-01-H |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Colorado department of transportation.
Busiest bridges in Dolores County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 491 Ml over Dove Creek | 1935 | 4,700 | Fair |
| US 491 Ml over Alkali Creek | 1937 | 3,400 | Poor |
| US 491 Ml over Cross Canyon | 1937 | 3,400 | Fair |
| US 491ML over Sharps Creek | 1937 | 3,400 | Fair |
| US 491 Ml over Draw | 1937 | 3,400 | Fair |
| US 491 Ml over Monument Creek | 1958 | 3,200 | Fair |
All bridges nearby: Dolores County, CO bridge conditions · every bridge in Dolores County · Colorado bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.