US-550 over San Juan River
FairSan Juan County, New Mexico · 0.7 MI S of JCT US-64 · Structure no. 000000000008243
- Built
- 1947
- 78 years old, rebuilt 1982
- Condition
- Fair
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 636 ft
- 9 main spans
- Daily traffic
- 6,535
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US-550 over San Juan River is a steel continuous stringer/multi-beam or girder carrying US-550 over San Juan River in San Juan County, New Mexico. It was built in 1947 and reconstructed in 1982, so it is 78 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 6 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 6,535 vehicles a day, roughly 17% of them trucks, projected to reach 8,887 by 2043. The structure is 636 ft (193.9 m) long and 109 ft wide. If it were closed, the detour would be 98.8 mi (159 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 US-550 over San Juan River built?
It was built in 1947, making it 78 years old in 2025. It was reconstructed in 1982.
What condition is US-550 over San Juan River 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 2024.
How much traffic does US-550 over San Juan River carry?
About 6,535 vehicles per day (2023 count), of which roughly 17% are trucks.
How long is US-550 over San Juan River?
The structure is 636 ft (193.9 m) long with a longest span of 82 ft (25 m) and a deck 109 ft wide.
Who owns US-550 over San Juan River?
It is owned by the State Highway Agency.