US Bridges

Interstate 980 over 30th Street

Good

Alameda County, California · 04-ALA-980-1.68-OAK · Structure no. 33 0350R

Built
1969
56 years old
Condition
Good
inspected May 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
122 ft
3 main spans
Daily traffic
57,500
2012 count
Owner
State
State Highway Agency

About this bridge

Interstate 980 over 30th Street is a concrete continuous box beam or girders - multiple carrying Interstate 980 over 30th Street in Alameda County, California. It was built in 1969, so it is 56 years old, older 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 57,500 vehicles a day, roughly 3% of them trucks, projected to reach 60,544 by 2044. The structure is 122 ft (37.2 m) long and 57 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 980
Crosses30th Street
Location04-ALA-980-1.68-OAK
RouteInterstate 980
Coordinates37.81925, -122.26943
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.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.5 US tons
Inventory rating28.9 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length122 ft (37.2 m)
Longest span62 ft (18.9 m)
Deck width57 ft (17.4 m)
Roadway width55 ft (16.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic57,500 (2012)
Projected traffic60,544 by 2044
Trucks3%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Interstate 980 over 30th Street built?

It was built in 1969, making it 56 years old in 2025.

What condition is Interstate 980 over 30th Street 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 May 2024.

How much traffic does Interstate 980 over 30th Street carry?

About 57,500 vehicles per day (2012 count), of which roughly 3% are trucks.

How long is Interstate 980 over 30th Street?

The structure is 122 ft (37.2 m) long with a longest span of 62 ft (18.9 m) and a deck 57 ft wide.

Who owns Interstate 980 over 30th Street?

It is owned by the State Highway Agency.