US Bridges

Harbour Way over Interstate 580

Fair

Contra Costa County, California · 04-CC-580-R3.60-RCH · Structure no. 28 0292

Built
1989
36 years old
Condition
Fair
inspected March 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
317 ft
2 main spans
Daily traffic
4,000
2016 count
Owner
State
State Highway Agency

About this bridge

Harbour Way over Interstate 580 is a prestressed concrete continuous box beam or girders - multiple carrying Harbour Way over Interstate 580 in Contra Costa County, California. It was built in 1989, so it is 36 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 4,000 vehicles a day, roughly 10% of them trucks, projected to reach 16,139 by 2042. The structure is 317 ft (96.6 m) long and 93 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesHarbour Way
CrossesInterstate 580
Location04-CC-580-R3.60-RCH
RouteCity Street 0
CountyContra Costa County
StateCalifornia
Coordinates37.92309, -122.35992
Functional classUrban 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
Deck7 GoodSome minor problems.
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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.9 US tons
Inventory rating53.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length317 ft (96.6 m)
Longest span170 ft (51.8 m)
Deck width93 ft (28.3 m)
Roadway width81 ft (24.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,000 (2016)
Projected traffic16,139 by 2042
Trucks10%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 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 Harbour Way over Interstate 580 built?

It was built in 1989, making it 36 years old in 2025.

What condition is Harbour Way 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 March 2024.

How much traffic does Harbour Way over Interstate 580 carry?

About 4,000 vehicles per day (2016 count), of which roughly 10% are trucks.

How long is Harbour Way over Interstate 580?

The structure is 317 ft (96.6 m) long with a longest span of 170 ft (51.8 m) and a deck 93 ft wide.

Who owns Harbour Way over Interstate 580?

It is owned by the State Highway Agency.