US 285 Ml over Chalk Creek
FairChaffee County, Colorado · 0.2 MI S. of Nathrop · Structure no. J-12-B
- Built
- 1965
- 60 years old
- Condition
- Fair
- inspected December 2023
- Type
- Culvert
- Concrete
- Length
- 21 ft
- 2 main spans
- Daily traffic
- 9,000
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
US 285 Ml over Chalk Creek is a concrete culvert carrying US 285 Ml over Chalk Creek in Chaffee County, Colorado. It was built in 1965, so it is 60 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 9,000 vehicles a day, roughly 5% of them trucks, projected to reach 11,520 by 2040. The structure is 21 ft (6.4 m) long and 122 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 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 285 Ml over Chalk Creek built?
It was built in 1965, making it 60 years old in 2025.
What condition is US 285 Ml over Chalk 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 December 2023.
How much traffic does US 285 Ml over Chalk Creek carry?
About 9,000 vehicles per day (2020 count), of which roughly 5% are trucks.
How long is US 285 Ml over Chalk Creek?
The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 122 ft wide.
Who owns US 285 Ml over Chalk Creek?
It is owned by the State Highway Agency.