US Bridges

State Route 4 over Ebmud Service Road

Fair

Contra Costa County, California · 04-CC-004-R14.45-CND · Structure no. 28 0260

Built
1978
47 years old
Condition
Fair
inspected June 2024
Type
Slab
Concrete
Length
24 ft
1 main span
Daily traffic
62,000
2018 count
Owner
State
State Highway Agency

About this bridge

State Route 4 over Ebmud Service Road is a concrete slab carrying State Route 4 over Ebmud Service Road in Contra Costa County, California. It was built in 1978, so it is 47 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 62,000 vehicles a day, roughly 7% of them trucks, projected to reach 127,639 by 2042. The structure is 24 ft (7.3 m) long and 150 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesState Route 4
CrossesEbmud Service Road
Location04-CC-004-R14.45-CND
RouteState Highway 4
CountyContra Costa County
StateCalifornia
Coordinates38.00425, -122.03938
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 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 rating110 US tons
Inventory rating110 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width150 ft (45.6 m)
Roadway width92 ft (28 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic62,000 (2018)
Projected traffic127,639 by 2042
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed1.2 mi (2 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 State Route 4 over Ebmud Service Road built?

It was built in 1978, making it 47 years old in 2025.

What condition is State Route 4 over Ebmud Service Road 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 2024.

How much traffic does State Route 4 over Ebmud Service Road carry?

About 62,000 vehicles per day (2018 count), of which roughly 7% are trucks.

How long is State Route 4 over Ebmud Service Road?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m) and a deck 150 ft wide.

Who owns State Route 4 over Ebmud Service Road?

It is owned by the State Highway Agency.