31st ST over South Platte River
FairDenver County, Colorado · 31st ST at Arkins Ct · Structure no. D-02-PR-050
- Built
- 1974
- 51 years old
- Condition
- Fair
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 204 ft
- 2 main spans
- Daily traffic
- 4,395
- 2021 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
31st ST over South Platte River is a prestressed concrete stringer/multi-beam or girder carrying 31st ST over South Platte River in Denver County, Colorado. It was built in 1974, so it is 51 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 4,395 vehicles a day, roughly 14% of them trucks, projected to reach 4,878 by 2041. The structure is 204 ft (62.2 m) long and 38 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 31st ST over South Platte River built?
It was built in 1974, making it 51 years old in 2025.
What condition is 31st ST over South Platte River 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 October 2024.
How much traffic does 31st ST over South Platte River carry?
About 4,395 vehicles per day (2021 count), of which roughly 14% are trucks.
How long is 31st ST over South Platte River?
The structure is 204 ft (62.2 m) long with a longest span of 98 ft (29.9 m) and a deck 38 ft wide.
Who owns 31st ST over South Platte River?
It is owned by the City or Municipal Highway Agency.