6th Street over Boulder Creek
FairBoulder County, Colorado · 0.1 MI So of Canyon Blvd · Structure no. BOLD-01-0.05-01
- Built
- 1978
- 47 years old
- Condition
- Fair
- inspected February 2025
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 122 ft
- 2 main spans
- Daily traffic
- 10,000
- 2021 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
6th Street over Boulder Creek is a prestressed concrete tee beam carrying 6th Street over Boulder Creek in Boulder County, Colorado. It was built in 1978, so it is 47 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 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 10,000 vehicles a day, roughly 3% of them trucks, projected to reach 12,000 by 2041. The structure is 122 ft (37.2 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 6th Street over Boulder Creek built?
It was built in 1978, making it 47 years old in 2025.
What condition is 6th Street 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 February 2025.
How much traffic does 6th Street over Boulder Creek carry?
About 10,000 vehicles per day (2021 count), of which roughly 3% are trucks.
How long is 6th Street over Boulder Creek?
The structure is 122 ft (37.2 m) long with a longest span of 60 ft (18.2 m) and a deck 35 ft wide.
Who owns 6th Street over Boulder Creek?
It is owned by the City or Municipal Highway Agency.