US 287 Ml over Highland Ditch
FairBoulder County, Colorado · 2.1 MI No of JCT SH 66 · Structure no. D-16-BC
- Built
- 1999
- 26 years old
- Condition
- Fair
- inspected December 2023
- Type
- Culvert
- Concrete
- Length
- 32 ft
- 2 main spans
- Daily traffic
- 23,000
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
US 287 Ml over Highland Ditch is a concrete culvert carrying US 287 Ml over Highland Ditch in Boulder County, Colorado. It was built in 1999, so it is 26 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 23,000 vehicles a day, roughly 2% of them trucks, projected to reach 29,900 by 2040. The structure is 32 ft (9.7 m) long and 177 ft wide. If it were closed, the detour would be 1.9 mi (3 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 Highland Ditch built?
It was built in 1999, making it 26 years old in 2025.
What condition is US 287 Ml over Highland 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 December 2023.
How much traffic does US 287 Ml over Highland Ditch carry?
About 23,000 vehicles per day (2020 count), of which roughly 2% are trucks.
How long is US 287 Ml over Highland Ditch?
The structure is 32 ft (9.7 m) long with a longest span of 15 ft (4.7 m) and a deck 177 ft wide.
Who owns US 287 Ml over Highland Ditch?
It is owned by the State Highway Agency.