US 285 Ml over Rio San Antonio
FairConejos County, Colorado · 4.8 MI North of New Mexic · Structure no. P-12-H
- Built
- 1938
- 87 years old
- Condition
- Fair
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 82 ft
- 2 main spans
- Daily traffic
- 1,200
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
US 285 Ml over Rio San Antonio is a steel stringer/multi-beam or girder carrying US 285 Ml over Rio San Antonio in Conejos County, Colorado. It was built in 1938, so it is 87 years old, older than the Colorado average of 42.2 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 1,200 vehicles a day, roughly 14% of them trucks, projected to reach 1,248 by 2040. The structure is 82 ft (25 m) long and 33 ft wide. If it were closed, the detour would be 0.6 mi (1 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 285 Ml over Rio San Antonio built?
It was built in 1938, making it 87 years old in 2025.
What condition is US 285 Ml over Rio San Antonio in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2023.
How much traffic does US 285 Ml over Rio San Antonio carry?
About 1,200 vehicles per day (2020 count), of which roughly 14% are trucks.
How long is US 285 Ml over Rio San Antonio?
The structure is 82 ft (25 m) long with a longest span of 39 ft (11.9 m) and a deck 33 ft wide.
Who owns US 285 Ml over Rio San Antonio?
It is owned by the State Highway Agency.