US Bridges

Bay ST over State Route 13

Fair

Alameda County, California · 04-ALA-013-13.71-BER · Structure no. 33 0213

Built
1954
71 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
67 ft
2 main spans
Daily traffic
5,000
2019 count
Owner
State
State Highway Agency

About this bridge

Bay ST over State Route 13 is a concrete continuous slab carrying Bay ST over State Route 13 in Alameda County, California. It was built in 1954, so it is 71 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 5,000 vehicles a day, roughly 5% of them trucks, projected to reach 7,456 by 2043. The structure is 67 ft (20.4 m) long and 37 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesBay ST
CrossesState Route 13
Location04-ALA-013-13.71-BER
RouteCity Street 0
CountyAlameda County
StateCalifornia
Coordinates37.84926, -122.29552
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.7 US tons
Inventory rating41.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length67 ft (20.4 m)
Longest span33 ft (10.1 m)
Deck width37 ft (11.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2019)
Projected traffic7,456 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Bay ST over State Route 13 built?

It was built in 1954, making it 71 years old in 2025.

What condition is Bay ST over State Route 13 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 Bay ST over State Route 13 carry?

About 5,000 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is Bay ST over State Route 13?

The structure is 67 ft (20.4 m) long with a longest span of 33 ft (10.1 m) and a deck 37 ft wide.

Who owns Bay ST over State Route 13?

It is owned by the State Highway Agency.