US 287 Ml over Lower Boulder Ditch
FairBoulder County, Colorado · 3.4 MI N of Lafayette · Structure no. D-16-DP
- Built
- 1997
- 28 years old
- Condition
- Fair
- inspected January 2024
- Type
- Culvert
- Concrete
- Length
- 20 ft
- 1 main span
- Daily traffic
- 26,000
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
US 287 Ml over Lower Boulder Ditch is a concrete culvert carrying US 287 Ml over Lower Boulder Ditch in Boulder County, Colorado. It was built in 1997, so it is 28 years old, younger 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 26,000 vehicles a day, roughly 3% of them trucks, projected to reach 36,920 by 2040. The structure is 20 ft (6.2 m) long and 193 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 | 8 Very Good | No problems noted. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 287 Ml over Lower Boulder Ditch built?
It was built in 1997, making it 28 years old in 2025.
What condition is US 287 Ml over Lower Boulder Ditch 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 January 2024.
How much traffic does US 287 Ml over Lower Boulder Ditch carry?
About 26,000 vehicles per day (2020 count), of which roughly 3% are trucks.
How long is US 287 Ml over Lower Boulder Ditch?
The structure is 20 ft (6.2 m) long with a longest span of 20 ft (6.2 m) and a deck 193 ft wide.
Who owns US 287 Ml over Lower Boulder Ditch?
It is owned by the State Highway Agency.