US Bridges

Mariposa RD over Temple Creek

Fair

San Joaquin County, California · 0.8 MI N/W Carrolton RD · Structure no. 29C0178

Built
1934
91 years old, rebuilt 1971
Condition
Fair
inspected November 2024
Type
Slab
Concrete Continuous
Length
43 ft
3 main spans
Daily traffic
5,528
2013 count
Owner
County
County Highway Agency

About this bridge

Mariposa RD over Temple Creek is a concrete continuous slab carrying Mariposa RD over Temple Creek in San Joaquin County, California. It was built in 1934 and reconstructed in 1971, so it is 91 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 5,528 vehicles a day, roughly 10% of them trucks, projected to reach 4,361 by 2044. The structure is 43 ft (13.1 m) long and 41 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesMariposa RD
CrossesTemple Creek
Location0.8 MI N/W Carrolton RD
RouteCounty Highway 0
Coordinates37.87849, -121.08715
Functional classRural Major Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.2 US tons
Inventory rating32.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length43 ft (13.1 m)
Longest span13 ft (4 m)
Deck width41 ft (12.4 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,528 (2013)
Projected traffic4,361 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 RD over Temple Creek built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1971.

What condition is Mariposa RD over Temple Creek 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 November 2024.

How much traffic does Mariposa RD over Temple Creek carry?

About 5,528 vehicles per day (2013 count), of which roughly 10% are trucks.

How long is Mariposa RD over Temple Creek?

The structure is 43 ft (13.1 m) long with a longest span of 13 ft (4 m) and a deck 41 ft wide.

Who owns Mariposa RD over Temple Creek?

It is owned by the County Highway Agency.