US Bridges

I-580 on Ramp over Central Ave

Fair

Contra Costa County, California · 04-CC-580-0.34-RCH · Structure no. 28 0231T

Built
1991
34 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete Continuous
Length
270 ft
9 main spans
Daily traffic
4,400
2011 count
Owner
State
State Highway Agency

About this bridge

I-580 on Ramp over Central Ave is a concrete continuous slab carrying I-580 on Ramp over Central Ave in Contra Costa County, California. It was built in 1991, so it is 34 years old, younger 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 4,400 vehicles a day, roughly 5% of them trucks, projected to reach 4,846 by 2042. The structure is 270 ft (82.2 m) long and 27 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-580 on Ramp
CrossesCentral Ave
Location04-CC-580-0.34-RCH
RouteInterstate 580
CountyContra Costa County
StateCalifornia
Coordinates37.90108, -122.31451
Functional classUrban Principal Arterial - Interstate

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 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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20 + Mod
Structure length270 ft (82.2 m)
Longest span30 ft (9.1 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,400 (2011)
Projected traffic4,846 by 2042
Trucks5%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
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 I-580 on Ramp over Central Ave built?

It was built in 1991, making it 34 years old in 2025.

What condition is I-580 on Ramp over Central Ave 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 2024.

How much traffic does I-580 on Ramp over Central Ave carry?

About 4,400 vehicles per day (2011 count), of which roughly 5% are trucks.

How long is I-580 on Ramp over Central Ave?

The structure is 270 ft (82.2 m) long with a longest span of 30 ft (9.1 m) and a deck 27 ft wide.

Who owns I-580 on Ramp over Central Ave?

It is owned by the State Highway Agency.