State Route 4 over Old River
PoorPosted for loadSan Joaquin County, California · 10-SJ-004-0.01 · Structure no. 29 0045
- Built
- 1915
- 110 years old
- Condition
- Poor
- inspected April 2023
- Type
- Movable - Swing
- Steel
- Length
- 528 ft
- 2 main spans
- Daily traffic
- 8,200
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 4 over Old River is a steel movable - swing carrying State Route 4 over Old River in San Joaquin County, California. It was built in 1915, so it is 110 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. Its operating status is: posted for other load-capacity restriction.
It carries about 8,200 vehicles a day, roughly 11% of them trucks, projected to reach 22,897 by 2043. The structure is 528 ft (160.9 m) long and 22 ft wide. If it were closed, the detour would be 31.7 mi (51 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 | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 4 over Old River built?
It was built in 1915, making it 110 years old in 2025.
What condition is State Route 4 over Old 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 April 2023.
How much traffic does State Route 4 over Old River carry?
About 8,200 vehicles per day (2009 count), of which roughly 11% are trucks.
How long is State Route 4 over Old River?
The structure is 528 ft (160.9 m) long with a longest span of 132 ft (40.2 m) and a deck 22 ft wide.
Who owns State Route 4 over Old River?
It is owned by the State Highway Agency.