County Road M over Rio San Antonio
FairConejos County, Colorado · 1.5 MI NE of CR 19 · Structure no. CON07.4E-05.0N
- Built
- 1980
- 45 years old
- Condition
- Fair
- inspected March 2025
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 80 ft
- 2 main spans
- Daily traffic
- 82
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
County Road M over Rio San Antonio is a steel continuous stringer/multi-beam or girder carrying County Road M over Rio San Antonio in Conejos County, Colorado. It was built in 1980, so it is 45 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 82 vehicles a day, projected to reach 95 by 2042. The structure is 80 ft (24.4 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was County Road M over Rio San Antonio built?
It was built in 1980, making it 45 years old in 2025.
What condition is County Road M 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 March 2025.
How much traffic does County Road M over Rio San Antonio carry?
About 82 vehicles per day (2022 count).
How long is County Road M over Rio San Antonio?
The structure is 80 ft (24.4 m) long with a longest span of 38 ft (11.7 m) and a deck 24 ft wide.
Who owns County Road M over Rio San Antonio?
It is owned by the County Highway Agency.