US 550 Ml over Hermosa Creek
GoodLa Plata County, Colorado · 10.6 MI No of JCT US 160 · Structure no. O-05-H
- Built
- 1964
- 61 years old
- Condition
- Good
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 92 ft
- 1 main span
- Daily traffic
- 6,200
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
US 550 Ml over Hermosa Creek is a steel stringer/multi-beam or girder carrying US 550 Ml over Hermosa Creek in La Plata County, Colorado. It was built in 1964, so it is 61 years old, older than the Colorado average of 42.2 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 6,200 vehicles a day, roughly 7% of them trucks, projected to reach 6,696 by 2040. The structure is 92 ft (28.1 m) long and 34 ft wide. If it were closed, the detour would be 0.6 mi (1 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 550 Ml over Hermosa Creek built?
It was built in 1964, making it 61 years old in 2025.
What condition is US 550 Ml over Hermosa Creek in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.
How much traffic does US 550 Ml over Hermosa Creek carry?
About 6,200 vehicles per day (2020 count), of which roughly 7% are trucks.
How long is US 550 Ml over Hermosa Creek?
The structure is 92 ft (28.1 m) long with a longest span of 60 ft (18.3 m) and a deck 34 ft wide.
Who owns US 550 Ml over Hermosa Creek?
It is owned by the State Highway Agency.