US Bridges

Interstate 5 NB over Walker Slough

Fair

San Joaquin County, California · 10-SJ-005-R23.93-STKN · Structure no. 29 0223R

Built
1971
54 years old
Condition
Fair
inspected October 2023
Type
Slab
Concrete Continuous
Length
118 ft
5 main spans
Daily traffic
43,750
2009 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 NB over Walker Slough is a concrete continuous slab carrying Interstate 5 NB over Walker Slough 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 43,750 vehicles a day, roughly 24% of them trucks, projected to reach 85,351 by 2043. The structure is 118 ft (36 m) long and 63 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesInterstate 5 NB
CrossesWalker Slough
Location10-SJ-005-R23.93-STKN
RouteInterstate 5
CountySan Joaquin County
StateCalifornia
Coordinates37.91674, -121.29057
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.4 US tons
Inventory rating36.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadUnknown
Structure length118 ft (36 m)
Longest span26 ft (7.9 m)
Deck width63 ft (19.2 m)
Roadway width61 ft (18.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic43,750 (2009)
Projected traffic85,351 by 2043
Trucks24%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 NB over Walker Slough built?

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

What condition is Interstate 5 NB over Walker Slough 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 October 2023.

How much traffic does Interstate 5 NB over Walker Slough carry?

About 43,750 vehicles per day (2009 count), of which roughly 24% are trucks.

How long is Interstate 5 NB over Walker Slough?

The structure is 118 ft (36 m) long with a longest span of 26 ft (7.9 m) and a deck 63 ft wide.

Who owns Interstate 5 NB over Walker Slough?

It is owned by the State Highway Agency.