US Bridges

E4-N160 Connector over State Route 4

Fair

Contra Costa County, California · 04-CC-004-R30.20-ANT · Structure no. 28 0388G

Built
2005
20 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
323 ft
2 main spans
Daily traffic
40,000
2019 count
Owner
State
State Highway Agency

About this bridge

E4-N160 Connector over State Route 4 is a prestressed concrete continuous box beam or girders - multiple carrying E4-N160 Connector over State Route 4 in Contra Costa County, California. It was built in 2005, so it is 20 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 40,000 vehicles a day, roughly 8% of them trucks, projected to reach 67,122 by 2045. The structure is 323 ft (98.4 m) long and 41 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesE4-N160 Connector
CrossesState Route 4
Location04-CC-004-R30.20-ANT
RouteState Highway 4
CountyContra Costa County
StateCalifornia
Coordinates37.99077, -121.75868
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 spans2
Design loadHS 20 + Mod
Structure length323 ft (98.4 m)
Longest span175 ft (53.4 m)
Deck width41 ft (12.6 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40,000 (2019)
Projected traffic67,122 by 2045
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 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 E4-N160 Connector over State Route 4 built?

It was built in 2005, making it 20 years old in 2025.

What condition is E4-N160 Connector over State Route 4 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 E4-N160 Connector over State Route 4 carry?

About 40,000 vehicles per day (2019 count), of which roughly 8% are trucks.

How long is E4-N160 Connector over State Route 4?

The structure is 323 ft (98.4 m) long with a longest span of 175 ft (53.4 m) and a deck 41 ft wide.

Who owns E4-N160 Connector over State Route 4?

It is owned by the State Highway Agency.