US Bridges

Carpenter Road over Duck Creek S Branch

Good

San Joaquin County, California · At Mariposa Road · Structure no. 29C0386

Built
1974
51 years old
Condition
Good
inspected January 2025
Type
Culvert
Concrete Continuous
Length
38 ft
2 main spans
Daily traffic
841
2017 count
Owner
County
County Highway Agency

About this bridge

Carpenter Road over Duck Creek S Branch is a concrete continuous culvert carrying Carpenter Road over Duck Creek S Branch in San Joaquin County, California. It was built in 1974, so it is 51 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 841 vehicles a day, roughly 15% of them trucks, projected to reach 764 by 2045. The structure is 38 ft (11.6 m) long and 116 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesCarpenter Road
CrossesDuck Creek S Branch
LocationAt Mariposa Road
RouteCounty Highway 0
Coordinates37.92805, -121.21613
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length38 ft (11.6 m)
Longest span18 ft (5.5 m)
Deck width116 ft (35.3 m)
Roadway width114 ft (34.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic841 (2017)
Projected traffic764 by 2045
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Carpenter Road over Duck Creek S Branch built?

It was built in 1974, making it 51 years old in 2025.

What condition is Carpenter Road over Duck Creek S Branch 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 Carpenter Road over Duck Creek S Branch carry?

About 841 vehicles per day (2017 count), of which roughly 15% are trucks.

How long is Carpenter Road over Duck Creek S Branch?

The structure is 38 ft (11.6 m) long with a longest span of 18 ft (5.5 m) and a deck 116 ft wide.

Who owns Carpenter Road over Duck Creek S Branch?

It is owned by the County Highway Agency.