US 491 Ml over Alkali Creek
Dolores County, Colorado · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 491 Ml over Alkali Creek in Dolores County, Colorado, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- It was built in 1937 and reconstructed in 1960, making it 88 years old at the 2025 inventory.
- It carries about 3,400 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (37.67575, -108.81601)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 4 | Poor condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 28 ft |
| Location | 1.5 Miles NW Cahone |
| NBI structure number | N-01-A |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Colorado department of transportation.
All bridges nearby: Dolores County, CO bridge conditions · Colorado bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.