I-25 Nbl over Alamosa River
GoodSierra County, New Mexico · 6.59 M N JCT NM-181/I-25 · Structure no. 000000000009642
- Built
- 1967
- 58 years old, rebuilt 2015
- Condition
- Good
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 364 ft
- 5 main spans
- Daily traffic
- 6,727
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
I-25 Nbl over Alamosa River is a prestressed concrete continuous stringer/multi-beam or girder carrying I-25 Nbl over Alamosa River in Sierra County, New Mexico. It was built in 1967 and reconstructed in 2015, so it is 58 years old, older than the New Mexico average of 51.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 6,727 vehicles a day, roughly 45% of them trucks, projected to reach 9,148 by 2043. The structure is 364 ft (110.9 m) long and 41 ft wide.
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-25 Nbl over Alamosa River built?
It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2015.
What condition is I-25 Nbl over Alamosa River in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.
How much traffic does I-25 Nbl over Alamosa River carry?
About 6,727 vehicles per day (2023 count), of which roughly 45% are trucks.
How long is I-25 Nbl over Alamosa River?
The structure is 364 ft (110.9 m) long with a longest span of 73 ft (22.1 m) and a deck 41 ft wide.
Who owns I-25 Nbl over Alamosa River?
It is owned by the State Highway Agency.