US 287 Ml over Boulder Creek
FairBoulder County, Colorado · 3 MI N of JCT SH 7 · Structure no. D-16-DA
- Built
- 1985
- 40 years old
- Condition
- Fair
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 221 ft
- 3 main spans
- Daily traffic
- 24,000
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
US 287 Ml over Boulder Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying US 287 Ml over Boulder Creek in Boulder County, Colorado. It was built in 1985, so it is 40 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 24,000 vehicles a day, roughly 3% of them trucks, projected to reach 33,360 by 2040. The structure is 221 ft (67.4 m) long and 87 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 |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 287 Ml over Boulder Creek built?
It was built in 1985, making it 40 years old in 2025.
What condition is US 287 Ml over Boulder 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 August 2023.
How much traffic does US 287 Ml over Boulder Creek carry?
About 24,000 vehicles per day (2020 count), of which roughly 3% are trucks.
How long is US 287 Ml over Boulder Creek?
The structure is 221 ft (67.4 m) long with a longest span of 73 ft (22.4 m) and a deck 87 ft wide.
Who owns US 287 Ml over Boulder Creek?
It is owned by the State Highway Agency.