Mission Street over Route I 280
FairSan Francisco County, California · 04-SF-280-R3.11-SF · Structure no. 34 0012
- Built
- 1963
- 62 years old
- Condition
- Fair
- inspected April 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 235 ft
- 2 main spans
- Daily traffic
- 23,600
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
Mission Street over Route I 280 is a concrete continuous box beam or girders - multiple carrying Mission Street over Route I 280 in San Francisco 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 23,600 vehicles a day, roughly 1% of them trucks, projected to reach 61,785 by 2044. The structure is 235 ft (71.6 m) long and 82 ft wide. If it were closed, the detour would be 1.9 mi (3 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mission Street over Route I 280 built?
It was built in 1963, making it 62 years old in 2025.
What condition is Mission Street over Route I 280 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 April 2024.
How much traffic does Mission Street over Route I 280 carry?
About 23,600 vehicles per day (2019 count), of which roughly 1% are trucks.
How long is Mission Street over Route I 280?
The structure is 235 ft (71.6 m) long with a longest span of 125 ft (38.1 m) and a deck 82 ft wide.
Who owns Mission Street over Route I 280?
It is owned by the State Highway Agency.