US Bridges

Hillcrest Ave NB over State Route 4

Fair

Contra Costa County, California · 04-CC-004-R28.94-ANT · Structure no. 28 0183L

Built
1997
28 years old, rebuilt 2016
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
256 ft
2 main spans
Daily traffic
18,000
2017 count
Owner
State
State Highway Agency

About this bridge

Hillcrest Ave NB over State Route 4 is a prestressed concrete continuous box beam or girders - multiple carrying Hillcrest Ave NB over State Route 4 in Contra Costa County, California. It was built in 1997 and reconstructed in 2016, so it is 28 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 6 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 18,000 vehicles a day, roughly 2% of them trucks, projected to reach 32,065 by 2045. The structure is 256 ft (78.1 m) long and 77 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesHillcrest Ave NB
CrossesState Route 4
Location04-CC-004-R28.94-ANT
RouteCity Street 0
CountyContra Costa County
StateCalifornia
Coordinates37.99655, -121.78556
Functional classUrban Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 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 rating60 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 length256 ft (78.1 m)
Longest span132 ft (40.3 m)
Deck width77 ft (23.4 m)
Roadway width63 ft (19.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,000 (2017)
Projected traffic32,065 by 2045
Trucks2%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 Hillcrest Ave NB over State Route 4 built?

It was built in 1997, making it 28 years old in 2025. It was reconstructed in 2016.

What condition is Hillcrest Ave NB 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 Hillcrest Ave NB over State Route 4 carry?

About 18,000 vehicles per day (2017 count), of which roughly 2% are trucks.

How long is Hillcrest Ave NB over State Route 4?

The structure is 256 ft (78.1 m) long with a longest span of 132 ft (40.3 m) and a deck 77 ft wide.

Who owns Hillcrest Ave NB over State Route 4?

It is owned by the State Highway Agency.