US Bridges

Interstate 5 over Eighth Street

Fair

San Joaquin County, California · 10-SJ-005-24.64-STKN · Structure no. 29 0224L

Built
1971
54 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
136 ft
1 main span
Daily traffic
41,050
2009 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 over Eighth Street is a prestressed concrete box beam or girders - multiple carrying Interstate 5 over Eighth Street in San Joaquin County, California. It was built in 1971, so it is 54 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 41,050 vehicles a day, roughly 16% of them trucks, projected to reach 109,692 by 2041. The structure is 136 ft (41.5 m) long and 53 ft wide.

CarriesInterstate 5
CrossesEighth Street
Location10-SJ-005-24.64-STKN
RouteInterstate 5
Coordinates37.92654, -121.29451
Functional classUrban Principal Arterial - Interstate

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.2 US tons
Inventory rating25 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length136 ft (41.5 m)
Longest span134 ft (40.8 m)
Deck width53 ft (16.2 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41,050 (2009)
Projected traffic109,692 by 2041
Trucks16%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 Interstate 5 over Eighth Street built?

It was built in 1971, making it 54 years old in 2025.

What condition is Interstate 5 over Eighth Street 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 Interstate 5 over Eighth Street carry?

About 41,050 vehicles per day (2009 count), of which roughly 16% are trucks.

How long is Interstate 5 over Eighth Street?

The structure is 136 ft (41.5 m) long with a longest span of 134 ft (40.8 m) and a deck 53 ft wide.

Who owns Interstate 5 over Eighth Street?

It is owned by the State Highway Agency.