US Bridges

Interstate 80 over Gate San Francisco Bay

Good

San Francisco County, California · 04-SF-080-R7.91-SF · Structure no. 34 0006

Built
2013
12 years old
Condition
Good
inspected September 2023
Type
Suspension
Steel Continuous
Length
11,523 ft
2 main spans
Daily traffic
265,000
2016 count
Owner
State
State Highway Agency

About this bridge

Interstate 80 over Gate San Francisco Bay is a steel continuous suspension carrying Interstate 80 over Gate San Francisco Bay in San Francisco County, California. It was built in 2013, so it is 12 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 265,000 vehicles a day, roughly 5% of them trucks, projected to reach 359,000 by 2042. The structure is 11,523 ft (3,512.3 m) long and 165 ft wide. If it were closed, the detour would be 34.8 mi (56 km).

CarriesInterstate 80
CrossesGate San Francisco Bay
Location04-SF-080-R7.91-SF
RouteInterstate 80
Coordinates37.81066, -122.36428
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSuspension
MaterialSteel Continuous
DeckSteel plate
Main spans2 (+60 approach)
Design loadHS 20 + Mod
Structure length11,523 ft (3,512.3 m)
Longest span1,263 ft (385 m)
Deck width165 ft (50.2 m)
Roadway width157 ft (48 m)
Vertical clearance over deck15 ft (4.6 m)

Traffic and service

Average daily traffic265,000 (2016)
Projected traffic359,000 by 2042
Trucks5%
Lanes on structure10
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and waterway
Detour if closed34.8 mi (56 km)
TollToll bridge
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Interstate 80 over Gate San Francisco Bay built?

It was built in 2013, making it 12 years old in 2025.

What condition is Interstate 80 over Gate San Francisco Bay in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does Interstate 80 over Gate San Francisco Bay carry?

About 265,000 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Interstate 80 over Gate San Francisco Bay?

The structure is 11,523 ft (3,512.3 m) long with a longest span of 1,263 ft (385 m) and a deck 165 ft wide.

Who owns Interstate 80 over Gate San Francisco Bay?

It is owned by the State Highway Agency.