US Bridges

Vasco Road over Interstate 580

Fair

Alameda County, California · 04-ALA-580-9.68 · Structure no. 33 0400

Built
1970
55 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
326 ft
4 main spans
Daily traffic
23,210
2009 count
Owner
State
State Highway Agency

About this bridge

Vasco Road over Interstate 580 is a prestressed concrete continuous stringer/multi-beam or girder carrying Vasco Road over Interstate 580 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 23,210 vehicles a day, roughly 2% of them trucks, projected to reach 28,088 by 2044. The structure is 326 ft (99.4 m) long and 73 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesVasco Road
CrossesInterstate 580
Location04-ALA-580-9.68
RouteCounty Highway 0
CountyAlameda County
StateCalifornia
Coordinates37.70868, -121.72353
Functional classRural Minor Arterial

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 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.5 US tons
Inventory rating22.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length326 ft (99.4 m)
Longest span94 ft (28.7 m)
Deck width73 ft (22.3 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,210 (2009)
Projected traffic28,088 by 2044
Trucks2%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed9.9 mi (16 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 Vasco Road over Interstate 580 built?

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

What condition is Vasco Road over Interstate 580 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 Vasco Road over Interstate 580 carry?

About 23,210 vehicles per day (2009 count), of which roughly 2% are trucks.

How long is Vasco Road over Interstate 580?

The structure is 326 ft (99.4 m) long with a longest span of 94 ft (28.7 m) and a deck 73 ft wide.

Who owns Vasco Road over Interstate 580?

It is owned by the State Highway Agency.