State Route 120 over So San Joaquin IRR Canal
FairSan Joaquin County, California · 10-SJ-120-21.17 · Structure no. 29 0044
- Built
- 1938
- 87 years old, rebuilt 1971
- Condition
- Fair
- inspected May 2023
- Type
- Slab
- Concrete Continuous
- Length
- 47 ft
- 2 main spans
- Daily traffic
- 18,200
- 2009 count
- Owner
- State
- State Highway Agency
About this bridge
State Route 120 over So San Joaquin IRR Canal is a concrete continuous slab carrying State Route 120 over So San Joaquin IRR Canal in San Joaquin County, California. It was built in 1938 and reconstructed in 1971, so it is 87 years old, older than the California average of 54.8 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 18,200 vehicles a day, roughly 10% of them trucks, projected to reach 38,864 by 2041. The structure is 47 ft (14.4 m) long and 42 ft wide. If it were closed, the detour would be 8.7 mi (14 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was State Route 120 over So San Joaquin IRR Canal built?
It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1971.
What condition is State Route 120 over So San Joaquin IRR Canal 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 May 2023.
How much traffic does State Route 120 over So San Joaquin IRR Canal carry?
About 18,200 vehicles per day (2009 count), of which roughly 10% are trucks.
How long is State Route 120 over So San Joaquin IRR Canal?
The structure is 47 ft (14.4 m) long with a longest span of 24 ft (7.2 m) and a deck 42 ft wide.
Who owns State Route 120 over So San Joaquin IRR Canal?
It is owned by the State Highway Agency.