US Bridges

Mariposa Road over S Br S Littlejohns Creek

Good

San Joaquin County, California · 0.3 MI NW Gawne RD · Structure no. 29C0176

Built
1971
54 years old
Condition
Good
inspected January 2025
Type
Slab
Concrete Continuous
Length
74 ft
3 main spans
Daily traffic
6,253
2013 count
Owner
County
County Highway Agency

About this bridge

Mariposa Road over S Br S Littlejohns Creek is a concrete continuous slab carrying Mariposa Road over S Br S Littlejohns Creek 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,253 vehicles a day, roughly 10% of them trucks, projected to reach 8,722 by 2045. The structure is 74 ft (22.6 m) long and 42 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesMariposa Road
CrossesS Br S Littlejohns Creek
Location0.3 MI NW Gawne RD
RouteCounty Highway 0
Coordinates37.89508, -121.11796
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.9 US tons
Inventory rating31.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length74 ft (22.6 m)
Longest span24 ft (7.3 m)
Deck width42 ft (12.8 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,253 (2013)
Projected traffic8,722 by 2045
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Mariposa Road over S Br S Littlejohns Creek built?

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

What condition is Mariposa Road over S Br S Littlejohns Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2025.

How much traffic does Mariposa Road over S Br S Littlejohns Creek carry?

About 6,253 vehicles per day (2013 count), of which roughly 10% are trucks.

How long is Mariposa Road over S Br S Littlejohns Creek?

The structure is 74 ft (22.6 m) long with a longest span of 24 ft (7.3 m) and a deck 42 ft wide.

Who owns Mariposa Road over S Br S Littlejohns Creek?

It is owned by the County Highway Agency.