SH 10 Ml over Rattlesnake Canyon
Huerfano County, Colorado · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SH 10 Ml over Rattlesnake Canyon in Huerfano County, Colorado, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1993, making it 32 years old at the 2025 inventory.
- It carries about 390 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- It is one of 65 of the 94 inventoried bridges in Huerfano County rated fair (69.1%); 2 (2.1%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated February 2022, on a 48-month routine inspection cycle.
- 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 → (37.73787, -104.50623)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 48 ft |
| Location | 16 Mi E of Walsenburg |
| NBI structure number | N-18-AZ |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | February 2022 |
| Inspection interval (item 91) | 48 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Colorado department of transportation.
Busiest bridges in Huerfano County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I 25 Ml over Draw | 1948 | 14,000 | Good |
| I 25 NE Ramp over Draw R | 1965 | 14,000 | Fair |
| I 25 Ml over Draw | 1930 | 14,000 | Fair |
| I25 Ml / Frontage over Mayne Arroyo | 1965 | 11,000 | Fair |
| I 25 Ml Sbnd over Apache Creek | 1965 | 7,000 | Good |
| I 25 Ml Sbnd over Pope Arroyo | 1965 | 7,000 | Fair |
All bridges nearby: Huerfano County, CO bridge conditions · every bridge in Huerfano County · Colorado bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.