SB 8 over Colorado River
FairYuma County, Arizona · 2.12 MI W of JCT US 95 · Structure no. 00486
- Built
- 1956
- 69 years old
- Condition
- Fair
- inspected February 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 837 ft
- 5 main spans
- Daily traffic
- 12,600
- 2018 count
- Owner
- State
- State Highway Agency
About this bridge
SB 8 over Colorado River is a steel continuous stringer/multi-beam or girder carrying SB 8 over Colorado River in Yuma County, Arizona. It was built in 1956, so it is 69 years old, older than the Arizona average of 47.8 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 12,600 vehicles a day, roughly 20% of them trucks, projected to reach 19,589 by 2042. The structure is 837 ft (255.1 m) long and 67 ft wide. If it were closed, the detour would be 6.2 mi (10 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 | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SB 8 over Colorado River built?
It was built in 1956, making it 69 years old in 2025.
What condition is SB 8 over Colorado 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 February 2023.
How much traffic does SB 8 over Colorado River carry?
About 12,600 vehicles per day (2018 count), of which roughly 20% are trucks.
How long is SB 8 over Colorado River?
The structure is 837 ft (255.1 m) long with a longest span of 180 ft (54.9 m) and a deck 67 ft wide.
Who owns SB 8 over Colorado River?
It is owned by the State Highway Agency.