Simpson LN over Yuba River
PoorYuba County, California · 0.5 MI Se/O E 10th ST · Structure no. 16C0001
- Built
- 1957
- 68 years old, rebuilt 1987
- Condition
- Poor
- inspected August 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 417 ft
- 5 main spans
- Daily traffic
- 11,630
- 2007 count
- Owner
- County
- County Highway Agency
About this bridge
Simpson LN over Yuba River is a prestressed concrete tee beam carrying Simpson LN over Yuba River in Yuba County, California. It was built in 1957 and reconstructed in 1987, so it is 68 years old, older than the California average of 54.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 11,630 vehicles a day, roughly 7% of them trucks, projected to reach 38,163 by 2041. The structure is 417 ft (127.1 m) long and 44 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 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Channel and channel protection | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Simpson LN over Yuba River built?
It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1987.
What condition is Simpson LN over Yuba River in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.
How much traffic does Simpson LN over Yuba River carry?
About 11,630 vehicles per day (2007 count), of which roughly 7% are trucks.
How long is Simpson LN over Yuba River?
The structure is 417 ft (127.1 m) long with a longest span of 83 ft (25.3 m) and a deck 44 ft wide.
Who owns Simpson LN over Yuba River?
It is owned by the County Highway Agency.