NM-1 over I-25 Nbl and Sbl
FairSierra County, New Mexico · Junction I-25 and NM-1 · Structure no. 000000000006765
- Built
- 1967
- 58 years old
- Condition
- Fair
- inspected March 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 183 ft
- 4 main spans
- Daily traffic
- 20
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
NM-1 over I-25 Nbl and Sbl is a prestressed concrete stringer/multi-beam or girder carrying NM-1 over I-25 Nbl and Sbl in Sierra County, New Mexico. It was built in 1967, 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 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 20 vehicles a day, roughly 10% of them trucks, projected to reach 27 by 2043. The structure is 183 ft (55.8 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was NM-1 over I-25 Nbl and Sbl built?
It was built in 1967, making it 58 years old in 2025.
What condition is NM-1 over I-25 Nbl and Sbl 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 2023.
How much traffic does NM-1 over I-25 Nbl and Sbl carry?
About 20 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is NM-1 over I-25 Nbl and Sbl?
The structure is 183 ft (55.8 m) long with a longest span of 52 ft (15.8 m) and a deck 35 ft wide.
Who owns NM-1 over I-25 Nbl and Sbl?
It is owned by the State Highway Agency.