US Bridges

E24/N680 Connector over N680/W24 Conn I-680 C.D.

Fair

Contra Costa County, California · 04-CC-024-R8.86-WLC · Structure no. 28 0126G

Built
1998
27 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
2,530 ft
15 main spans
Daily traffic
32,000
2019 count
Owner
State
State Highway Agency

About this bridge

E24/N680 Connector over N680/W24 Conn I-680 C.D. is a prestressed concrete continuous box beam or girders - multiple carrying E24/N680 Connector over N680/W24 Conn I-680 C.D. 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 32,000 vehicles a day, roughly 3% of them trucks, projected to reach 40,345 by 2041. The structure is 2,530 ft (771 m) long and 55 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesE24/N680 Connector
CrossesN680/W24 Conn I-680 C.D.
Location04-CC-024-R8.86-WLC
RouteState Highway 24
CountyContra Costa County
StateCalifornia
Coordinates37.89583, -122.07476
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionJune 2023
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 rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans15
Design loadHS 20 + Mod
Structure length2,530 ft (771 m)
Longest span238 ft (72.4 m)
Deck width55 ft (16.7 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32,000 (2019)
Projected traffic40,345 by 2041
Trucks3%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

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 E24/N680 Connector over N680/W24 Conn I-680 C.D. built?

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

What condition is E24/N680 Connector over N680/W24 Conn I-680 C.D. 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 June 2023.

How much traffic does E24/N680 Connector over N680/W24 Conn I-680 C.D. carry?

About 32,000 vehicles per day (2019 count), of which roughly 3% are trucks.

How long is E24/N680 Connector over N680/W24 Conn I-680 C.D.?

The structure is 2,530 ft (771 m) long with a longest span of 238 ft (72.4 m) and a deck 55 ft wide.

Who owns E24/N680 Connector over N680/W24 Conn I-680 C.D.?

It is owned by the State Highway Agency.