US Bridges

N680-W24 Connector over Olympic Blvd I-680

Fair

Contra Costa County, California · 04-CC-680-14.15-WLC · Structure no. 28 0130G

Built
1998
27 years old
Condition
Fair
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
2,360 ft
17 main spans
Daily traffic
17,800
2020 count
Owner
State
State Highway Agency

About this bridge

N680-W24 Connector over Olympic Blvd I-680 is a prestressed concrete continuous box beam or girders - multiple carrying N680-W24 Connector over Olympic Blvd I-680 in Contra Costa County, California. It was built in 1998, so it is 27 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 17,800 vehicles a day, roughly 7% of them trucks, projected to reach 23,685 by 2041. The structure is 2,360 ft (719.3 m) long and 55 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesN680-W24 Connector
CrossesOlympic Blvd I-680
Location04-CC-680-14.15-WLC
RouteInterstate 680
CountyContra Costa County
StateCalifornia
Coordinates37.89635, -122.07373
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 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 typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans17
Design loadHS 20 + Mod
Structure length2,360 ft (719.3 m)
Longest span172 ft (52.4 m)
Deck width55 ft (16.7 m)
Roadway width51 ft (15.6 m)
Vertical clearance over deck17 ft (5.2 m)

Traffic and service

Average daily traffic17,800 (2020)
Projected traffic23,685 by 2041
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate 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 N680-W24 Connector over Olympic Blvd I-680 built?

It was built in 1998, making it 27 years old in 2025.

What condition is N680-W24 Connector over Olympic Blvd I-680 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 July 2024.

How much traffic does N680-W24 Connector over Olympic Blvd I-680 carry?

About 17,800 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is N680-W24 Connector over Olympic Blvd I-680?

The structure is 2,360 ft (719.3 m) long with a longest span of 172 ft (52.4 m) and a deck 55 ft wide.

Who owns N680-W24 Connector over Olympic Blvd I-680?

It is owned by the State Highway Agency.