US Bridges

Interstate 5 over Mokelumne River

Fair

San Joaquin County, California · 10-SJ-005-49.78 · Structure no. 29 0197L

Built
1979
46 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,235 ft
1 main span
Daily traffic
26,500
2015 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 over Mokelumne River is a prestressed concrete stringer/multi-beam or girder carrying Interstate 5 over Mokelumne River in San Joaquin County, California. It was built in 1979, so it is 46 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 26,500 vehicles a day, projected to reach 46,572 by 2046. The structure is 1,235 ft (376.4 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesInterstate 5
CrossesMokelumne River
Location10-SJ-005-49.78
RouteInterstate 5
CountySan Joaquin County
StateCalifornia
Coordinates38.25433, -121.44785
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 protection7 GoodSome minor problems.
Last inspectionApril 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.3 US tons
Inventory rating22.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1 (+20 approach)
Design loadHS 20 + Mod
Structure length1,235 ft (376.4 m)
Longest span91 ft (27.7 m)
Deck width42 ft (12.8 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,500 (2015)
Projected traffic46,572 by 2046
Trucks0%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 over Mokelumne River built?

It was built in 1979, making it 46 years old in 2025.

What condition is Interstate 5 over Mokelumne River 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 April 2024.

How much traffic does Interstate 5 over Mokelumne River carry?

About 26,500 vehicles per day (2015 count).

How long is Interstate 5 over Mokelumne River?

The structure is 1,235 ft (376.4 m) long with a longest span of 91 ft (27.7 m) and a deck 42 ft wide.

Who owns Interstate 5 over Mokelumne River?

It is owned by the State Highway Agency.