US 550 Ml over Cascade Creek
FairSan Juan County, Colorado · 30 MI No of JCT US 160 · Structure no. N-05-D
- Built
- 1949
- 76 years old
- Condition
- Fair
- inspected May 2023
- Type
- Culvert
- Concrete
- Length
- 30 ft
- 1 main span
- Daily traffic
- 1,900
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
US 550 Ml over Cascade Creek is a concrete culvert carrying US 550 Ml over Cascade Creek in San Juan County, Colorado. It was built in 1949, so it is 76 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 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 1,900 vehicles a day, roughly 11% of them trucks, projected to reach 1,938 by 2040. The structure is 30 ft (9.1 m) long and 128 ft wide. If it were closed, the detour would be 123.7 mi (199 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 |
|---|---|---|
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 550 Ml over Cascade Creek built?
It was built in 1949, making it 76 years old in 2025.
What condition is US 550 Ml over Cascade Creek 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 May 2023.
How much traffic does US 550 Ml over Cascade Creek carry?
About 1,900 vehicles per day (2020 count), of which roughly 11% are trucks.
How long is US 550 Ml over Cascade Creek?
The structure is 30 ft (9.1 m) long with a longest span of 30 ft (9.1 m) and a deck 128 ft wide.
Who owns US 550 Ml over Cascade Creek?
It is owned by the State Highway Agency.