NM-400 over Rio Puerco
FairPosted for loadMcKinley County, New Mexico · 0.3 MI S of JCT I-40 · Structure no. 000000000004186
- Built
- 1935
- 90 years old
- Condition
- Fair
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 115 ft
- 6 main spans
- Daily traffic
- 1,524
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
NM-400 over Rio Puerco is a wood or timber stringer/multi-beam or girder carrying NM-400 over Rio Puerco in McKinley County, New Mexico. It was built in 1935, so it is 90 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. Its operating status is: posted for load restriction.
It carries about 1,524 vehicles a day, roughly 11% of them trucks, projected to reach 2,072 by 2043. The structure is 115 ft (35.1 m) long and 30 ft wide. If it were closed, the detour would be 29.8 mi (48 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was NM-400 over Rio Puerco built?
It was built in 1935, making it 90 years old in 2025.
What condition is NM-400 over Rio Puerco 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 2024.
How much traffic does NM-400 over Rio Puerco carry?
About 1,524 vehicles per day (2023 count), of which roughly 11% are trucks.
How long is NM-400 over Rio Puerco?
The structure is 115 ft (35.1 m) long with a longest span of 19 ft (5.9 m) and a deck 30 ft wide.
Who owns NM-400 over Rio Puerco?
It is owned by the State Highway Agency.