Irr# US 550 Ml over Animas River
FairLa Plata County, Colorado · 3 MI North of New Mexico · Structure no. P-05-G
- Built
- 1957
- 68 years old
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 356 ft
- 5 main spans
- Daily traffic
- 8,100
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
Irr# US 550 Ml over Animas River is a steel continuous stringer/multi-beam or girder carrying Irr# US 550 Ml over Animas River in La Plata County, Colorado. It was built in 1957, so it is 68 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 8,100 vehicles a day, roughly 7% of them trucks, projected to reach 10,692 by 2040. The structure is 356 ft (108.6 m) long and 34 ft wide. If it were closed, the detour would be 8.7 mi (14 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 | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Irr# US 550 Ml over Animas River built?
It was built in 1957, making it 68 years old in 2025.
What condition is Irr# US 550 Ml over Animas 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 October 2023.
How much traffic does Irr# US 550 Ml over Animas River carry?
About 8,100 vehicles per day (2020 count), of which roughly 7% are trucks.
How long is Irr# US 550 Ml over Animas River?
The structure is 356 ft (108.6 m) long with a longest span of 76 ft (23.2 m) and a deck 34 ft wide.
Who owns Irr# US 550 Ml over Animas River?
It is owned by the State Highway Agency.