US Bridges

State Route 24 over Dolores Drive

Good

Contra Costa County, California · 04-CC-024-R5.84-LFYT · Structure no. 28 0134R

Built
1957
68 years old, rebuilt 1971
Condition
Good
inspected June 2021
Type
Box Beam or Girders - Multiple
Concrete
Length
65 ft
1 main span
Daily traffic
79,500
2019 count
Owner
State
State Highway Agency

About this bridge

State Route 24 over Dolores Drive is a concrete box beam or girders - multiple carrying State Route 24 over Dolores Drive in Contra Costa County, California. It was built in 1957 and reconstructed in 1971, so it is 68 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 79,500 vehicles a day, roughly 3% of them trucks, projected to reach 117,394 by 2041. The structure is 65 ft (19.8 m) long and 68 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesState Route 24
CrossesDolores Drive
Location04-CC-024-R5.84-LFYT
RouteState Highway 24
Coordinates37.89188, -122.12867
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.5 US tons
Inventory rating35.4 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length65 ft (19.8 m)
Longest span65 ft (19.8 m)
Deck width68 ft (20.7 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic79,500 (2019)
Projected traffic117,394 by 2041
Trucks3%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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 24 over Dolores Drive built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1971.

What condition is State Route 24 over Dolores Drive in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2021.

How much traffic does State Route 24 over Dolores Drive carry?

About 79,500 vehicles per day (2019 count), of which roughly 3% are trucks.

How long is State Route 24 over Dolores Drive?

The structure is 65 ft (19.8 m) long with a longest span of 65 ft (19.8 m) and a deck 68 ft wide.

Who owns State Route 24 over Dolores Drive?

It is owned by the State Highway Agency.