US Bridges

State Route 24 WB over 40th Street

Fair

Alameda County, California · 04-ALA-024-R2.20-OAK · Structure no. 33 0359L

Built
1970
55 years old
Condition
Fair
inspected January 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
171 ft
4 main spans
Daily traffic
75,500
2012 count
Owner
State
State Highway Agency

About this bridge

State Route 24 WB over 40th Street is a concrete continuous box beam or girders - multiple carrying State Route 24 WB over 40th Street in Alameda County, California. It was built in 1970, so it is 55 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 75,500 vehicles a day, roughly 3% of them trucks, projected to reach 99,517 by 2044. The structure is 171 ft (52.1 m) long and 57 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesState Route 24 WB
Crosses40th Street
Location04-ALA-024-R2.20-OAK
RouteState Highway 24
Coordinates37.82935, -122.26719
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.1 US tons
Inventory rating28.5 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length171 ft (52.1 m)
Longest span57 ft (17.4 m)
Deck width57 ft (17.4 m)
Roadway width55 ft (16.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75,500 (2012)
Projected traffic99,517 by 2044
Trucks3%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed11.2 mi (18 km)
TollOn a free road
National Highway SystemYes

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 State Route 24 WB over 40th Street built?

It was built in 1970, making it 55 years old in 2025.

What condition is State Route 24 WB over 40th Street 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 January 2024.

How much traffic does State Route 24 WB over 40th Street carry?

About 75,500 vehicles per day (2012 count), of which roughly 3% are trucks.

How long is State Route 24 WB over 40th Street?

The structure is 171 ft (52.1 m) long with a longest span of 57 ft (17.4 m) and a deck 57 ft wide.

Who owns State Route 24 WB over 40th Street?

It is owned by the State Highway Agency.