Lamar Street over Ralston Creek | Ralston
FairJefferson County, Colorado · Just North of Ralston RD · Structure no. ARVA-LR-0.04-01
- Built
- 1975
- 50 years old
- Condition
- Fair
- inspected March 2023
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 149 ft
- 2 main spans
- Daily traffic
- 6,422
- 2021 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Lamar Street over Ralston Creek | Ralston is a prestressed concrete box beam or girders - multiple carrying Lamar Street over Ralston Creek | Ralston in Jefferson County, Colorado. It was built in 1975, so it is 50 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 6,422 vehicles a day, roughly 4% of them trucks, projected to reach 7,385 by 2041. The structure is 149 ft (45.4 m) long and 61 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Lamar Street over Ralston Creek | Ralston built?
It was built in 1975, making it 50 years old in 2025.
What condition is Lamar Street over Ralston Creek | Ralston 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 March 2023.
How much traffic does Lamar Street over Ralston Creek | Ralston carry?
About 6,422 vehicles per day (2021 count), of which roughly 4% are trucks.
How long is Lamar Street over Ralston Creek | Ralston?
The structure is 149 ft (45.4 m) long with a longest span of 70 ft (21.3 m) and a deck 61 ft wide.
Who owns Lamar Street over Ralston Creek | Ralston?
It is owned by the City or Municipal Highway Agency.