US Bridges

E24 & Acalanes RD over Acalanes Road

Fair

Contra Costa County, California · 04-CC-024-R4.40-LFYT · Structure no. 28 0110S

Built
1959
66 years old, rebuilt 1969
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Concrete
Length
90 ft
1 main span
Daily traffic
1,700
2017 count
Owner
State
State Highway Agency

About this bridge

E24 & Acalanes RD over Acalanes Road is a concrete box beam or girders - multiple carrying E24 & Acalanes RD over Acalanes Road in Contra Costa County, California. It was built in 1959 and reconstructed in 1969, so it is 66 years old, older 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 1,700 vehicles a day, roughly 2% of them trucks, projected to reach 2,152 by 2041. The structure is 90 ft (27.4 m) long and 34 ft wide.

Location

Open in Google Maps
CarriesE24 & Acalanes RD
CrossesAcalanes Road
Location04-CC-024-R4.40-LFYT
RouteState Highway 24
CountyContra Costa County
StateCalifornia
Coordinates37.89158, -122.15447
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110 US tons
Inventory rating74 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length90 ft (27.4 m)
Longest span85 ft (25.9 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,700 (2017)
Projected traffic2,152 by 2041
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 & Acalanes RD over Acalanes Road built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1969.

What condition is E24 & Acalanes RD over Acalanes 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 2023.

How much traffic does E24 & Acalanes RD over Acalanes Road carry?

About 1,700 vehicles per day (2017 count), of which roughly 2% are trucks.

How long is E24 & Acalanes RD over Acalanes Road?

The structure is 90 ft (27.4 m) long with a longest span of 85 ft (25.9 m) and a deck 34 ft wide.

Who owns E24 & Acalanes RD over Acalanes Road?

It is owned by the State Highway Agency.