I Street over State Route 99
FairStanislaus County, California · 10-STA-099-R15.85-MOD · Structure no. 38 0090
- Built
- 1963
- 62 years old
- Condition
- Fair
- inspected March 2023
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 205 ft
- 4 main spans
- Daily traffic
- 5,400
- 2011 count
- Owner
- State
- State Highway Agency
About this bridge
I Street over State Route 99 is a concrete continuous box beam or girders - multiple carrying I Street over State Route 99 in Stanislaus County, California. It was built in 1963, so it is 62 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 5,400 vehicles a day, roughly 3% of them trucks, projected to reach 14,829 by 2041. The structure is 205 ft (62.5 m) long and 86 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I Street over State Route 99 built?
It was built in 1963, making it 62 years old in 2025.
What condition is I Street over State Route 99 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 March 2023.
How much traffic does I Street over State Route 99 carry?
About 5,400 vehicles per day (2011 count), of which roughly 3% are trucks.
How long is I Street over State Route 99?
The structure is 205 ft (62.5 m) long with a longest span of 71 ft (21.5 m) and a deck 86 ft wide.
Who owns I Street over State Route 99?
It is owned by the State Highway Agency.