Horizon Avenue over Rock Creek
FairBoulder County, Colorado · .1 MI East 120th · Structure no. LAF-HORIZ-004
- Built
- 2000
- 25 years old
- Condition
- Fair
- inspected January 2025
- Type
- Culvert
- Concrete
- Length
- 76 ft
- 4 main spans
- Daily traffic
- 1,043
- 2023 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Horizon Avenue over Rock Creek is a concrete culvert carrying Horizon Avenue over Rock Creek in Boulder County, Colorado. It was built in 2000, so it is 25 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 1,043 vehicles a day, roughly 11% of them trucks, projected to reach 1,251 by 2043. The structure is 76 ft (23.2 m) long and 48 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 |
|---|---|---|
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Horizon Avenue over Rock Creek built?
It was built in 2000, making it 25 years old in 2025.
What condition is Horizon Avenue over Rock 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 January 2025.
How much traffic does Horizon Avenue over Rock Creek carry?
About 1,043 vehicles per day (2023 count), of which roughly 11% are trucks.
How long is Horizon Avenue over Rock Creek?
The structure is 76 ft (23.2 m) long with a longest span of 20 ft (6.1 m) and a deck 48 ft wide.
Who owns Horizon Avenue over Rock Creek?
It is owned by the City or Municipal Highway Agency.