CR 1 (co Line Rd) over Lower Boulder Ditch
FairBoulder County, Colorado · 0.4 MI N of Cheeseman ST · Structure no. ERI001.0-008.0A
- Built
- 1996
- 29 years old
- Condition
- Fair
- inspected February 2024
- Type
- Frame
- Concrete
- Length
- 22 ft
- 1 main span
- Daily traffic
- 5,611
- 2023 count
- Owner
- Town / Township
- Town or Township Highway Agency
About this bridge
CR 1 (co Line Rd) over Lower Boulder Ditch is a concrete frame carrying CR 1 (co Line Rd) over Lower Boulder Ditch in Boulder County, Colorado. It was built in 1996, so it is 29 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 5,611 vehicles a day, roughly 13% of them trucks, projected to reach 7,968 by 2042. The structure is 22 ft (6.7 m) long and 39 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 |
|---|---|---|
| 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 CR 1 (co Line Rd) over Lower Boulder Ditch built?
It was built in 1996, making it 29 years old in 2025.
What condition is CR 1 (co Line Rd) over Lower Boulder Ditch 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 2024.
How much traffic does CR 1 (co Line Rd) over Lower Boulder Ditch carry?
About 5,611 vehicles per day (2023 count), of which roughly 13% are trucks.
How long is CR 1 (co Line Rd) over Lower Boulder Ditch?
The structure is 22 ft (6.7 m) long with a longest span of 20 ft (6.1 m) and a deck 39 ft wide.
Who owns CR 1 (co Line Rd) over Lower Boulder Ditch?
It is owned by the Town or Township Highway Agency.