Folsom Street over Boulder Creek
FairBoulder County, Colorado · 0.40 MI S of Canyon Blvd · Structure no. BOLD-04-0.40-01
- Built
- 1965
- 60 years old
- Condition
- Fair
- inspected February 2025
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 60 ft
- 1 main span
- Daily traffic
- 8,407
- 2023 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Folsom Street over Boulder Creek is a prestressed concrete stringer/multi-beam or girder carrying Folsom Street over Boulder Creek in Boulder 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 8,407 vehicles a day, roughly 4% of them trucks, projected to reach 10,088 by 2043. The structure is 60 ft (18.3 m) long and 56 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Folsom Street over Boulder Creek built?
It was built in 1965, making it 60 years old in 2025.
What condition is Folsom 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 Folsom Street over Boulder Creek carry?
About 8,407 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is Folsom Street over Boulder Creek?
The structure is 60 ft (18.3 m) long with a longest span of 57 ft (17.4 m) and a deck 56 ft wide.
Who owns Folsom Street over Boulder Creek?
It is owned by the City or Municipal Highway Agency.