US Bridges

State Route 4 over State Route 4

Fair

San Joaquin County, California · 10-SJ-004-R15.70-STKN · Structure no. 29 0350

Built
2017
8 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
2,870 ft
21 main spans
Daily traffic
15,800
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 4 over State Route 4 is a prestressed concrete continuous stringer/multi-beam or girder carrying State Route 4 over State Route 4 in San Joaquin County, California. It was built in 2017, so it is 8 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 15,800 vehicles a day, roughly 11% of them trucks, projected to reach 24,457 by 2043. The structure is 2,870 ft (874.9 m) long and 39 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

CarriesState Route 4
CrossesState Route 4
Location10-SJ-004-R15.70-STKN
RouteState Highway 4
Coordinates37.9388, -121.32006
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans21
Design loadHL 93
Structure length2,870 ft (874.9 m)
Longest span165 ft (50.3 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,800 (2009)
Projected traffic24,457 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate 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 State Route 4 over State Route 4 built?

It was built in 2017, making it 8 years old in 2025.

What condition is State Route 4 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 August 2023.

How much traffic does State Route 4 over State Route 4 carry?

About 15,800 vehicles per day (2009 count), of which roughly 11% are trucks.

How long is State Route 4 over State Route 4?

The structure is 2,870 ft (874.9 m) long with a longest span of 165 ft (50.3 m) and a deck 39 ft wide.

Who owns State Route 4 over State Route 4?

It is owned by the State Highway Agency.