Pierce Street over Lilley Gulch | Lilley Gu
FairJefferson County, Colorado · 0.4 MI N of Coalmine RD · Structure no. J-17-72A
- Built
- 1971
- 54 years old, rebuilt 1996
- Condition
- Fair
- inspected February 2025
- Type
- Culvert
- Concrete
- Length
- 55 ft
- 5 main spans
- Daily traffic
- 16,812
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
Pierce Street over Lilley Gulch | Lilley Gu is a concrete culvert carrying Pierce Street over Lilley Gulch | Lilley Gu in Jefferson County, Colorado. It was built in 1971 and reconstructed in 1996, so it is 54 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 16,812 vehicles a day, roughly 2% of them trucks, projected to reach 19,334 by 2041. The structure is 55 ft (16.9 m) long and 127 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Pierce Street over Lilley Gulch | Lilley Gu built?
It was built in 1971, making it 54 years old in 2025. It was reconstructed in 1996.
What condition is Pierce Street over Lilley Gulch | Lilley Gu 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 Pierce Street over Lilley Gulch | Lilley Gu carry?
About 16,812 vehicles per day (2021 count), of which roughly 2% are trucks.
How long is Pierce Street over Lilley Gulch | Lilley Gu?
The structure is 55 ft (16.9 m) long with a longest span of 10 ft (3 m) and a deck 127 ft wide.
Who owns Pierce Street over Lilley Gulch | Lilley Gu?
It is owned by the County Highway Agency.