US Bridges

State Route 13 SB over Carson Street

Fair

Alameda County, California · 04-ALA-013-5.01-OAK · Structure no. 33 0105L

Built
1966
59 years old
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
161 ft
3 main spans
Daily traffic
47,000
2019 count
Owner
State
State Highway Agency

About this bridge

State Route 13 SB over Carson Street is a concrete continuous box beam or girders - multiple carrying State Route 13 SB over Carson Street in Alameda County, California. It was built in 1966, so it is 59 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 47,000 vehicles a day, roughly 2% of them trucks, projected to reach 70,095 by 2043. The structure is 161 ft (49.1 m) long and 40 ft wide.

CarriesState Route 13 SB
CrossesCarson Street
Location04-ALA-013-5.01-OAK
RouteState Highway 13
Coordinates37.79371, -122.18187
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.5 US tons
Inventory rating37.8 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length161 ft (49.1 m)
Longest span81 ft (24.8 m)
Deck width40 ft (12.1 m)
Roadway width38 ft (11.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic47,000 (2019)
Projected traffic70,095 by 2043
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 13 SB over Carson Street built?

It was built in 1966, making it 59 years old in 2025.

What condition is State Route 13 SB over Carson 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 March 2023.

How much traffic does State Route 13 SB over Carson Street carry?

About 47,000 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is State Route 13 SB over Carson Street?

The structure is 161 ft (49.1 m) long with a longest span of 81 ft (24.8 m) and a deck 40 ft wide.

Who owns State Route 13 SB over Carson Street?

It is owned by the State Highway Agency.