Third Street over Islais Creek
FairSan Francisco County, California · Just N/O Cargo Way · Structure no. 34C0024
- Built
- 1945
- 80 years old
- Condition
- Fair
- inspected December 2024
- Type
- Movable - Bascule
- Steel
- Length
- 161 ft
- 1 main span
- Daily traffic
- 50,000
- 2016 count
- Owner
- County
- County Highway Agency
About this bridge
Third Street over Islais Creek is a steel movable - bascule carrying Third Street over Islais Creek in San Francisco County, California. It was built in 1945, so it is 80 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 50,000 vehicles a day, roughly 40% of them trucks, projected to reach 83,815 by 2043. The structure is 161 ft (49 m) long and 80 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Third Street over Islais Creek built?
It was built in 1945, making it 80 years old in 2025.
What condition is Third Street over Islais Creek 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 December 2024.
How much traffic does Third Street over Islais Creek carry?
About 50,000 vehicles per day (2016 count), of which roughly 40% are trucks.
How long is Third Street over Islais Creek?
The structure is 161 ft (49 m) long with a longest span of 105 ft (32 m) and a deck 80 ft wide.
Who owns Third Street over Islais Creek?
It is owned by the County Highway Agency.