US Bridges

Interstate 5 SB over California Aqueduct

Fair

Stanislaus County, California · 10-STA-005-6.47 · Structure no. 38 0108L

Built
1967
58 years old
Condition
Fair
inspected February 2024
Type
Tee Beam
Concrete Continuous
Length
260 ft
4 main spans
Daily traffic
17,500
2009 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 SB over California Aqueduct is a concrete continuous tee beam carrying Interstate 5 SB over California Aqueduct in Stanislaus County, California. It was built in 1967, so it is 58 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 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 17,500 vehicles a day, roughly 25% of them trucks, projected to reach 24,927 by 2046. The structure is 260 ft (79.3 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesInterstate 5 SB
CrossesCalifornia Aqueduct
Location10-STA-005-6.47
RouteInterstate 5
CountyStanislaus County
StateCalifornia
Coordinates37.339, -121.11453
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.4 US tons
Inventory rating27.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length260 ft (79.3 m)
Longest span72 ft (21.9 m)
Deck width42 ft (12.9 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,500 (2009)
Projected traffic24,927 by 2046
Trucks25%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Interstate 5 SB over California Aqueduct built?

It was built in 1967, making it 58 years old in 2025.

What condition is Interstate 5 SB over California Aqueduct 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 February 2024.

How much traffic does Interstate 5 SB over California Aqueduct carry?

About 17,500 vehicles per day (2009 count), of which roughly 25% are trucks.

How long is Interstate 5 SB over California Aqueduct?

The structure is 260 ft (79.3 m) long with a longest span of 72 ft (21.9 m) and a deck 42 ft wide.

Who owns Interstate 5 SB over California Aqueduct?

It is owned by the State Highway Agency.