US Bridges

Davis Road over Kettleman Slough

Good

San Joaquin County, California · 1.0 MI N of 8 Mile Road · Structure no. 29C0225

Built
1928
97 years old
Condition
Good
inspected January 2024
Type
Slab
Concrete Continuous
Length
29 ft
2 main spans
Daily traffic
5,015
2013 count
Owner
County
County Highway Agency

About this bridge

Davis Road over Kettleman Slough is a concrete continuous slab carrying Davis Road over Kettleman Slough in San Joaquin County, California. It was built in 1928, so it is 97 years old, older 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 5,015 vehicles a day, roughly 5% of them trucks, projected to reach 2,187 by 2042. The structure is 29 ft (8.8 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesDavis Road
CrossesKettleman Slough
Location1.0 MI N of 8 Mile Road
RouteCounty Highway 0
Coordinates38.07205, -121.33332
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 protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating37.8 US tons
Inventory rating22.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span14 ft (4.3 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,015 (2013)
Projected traffic2,187 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Davis Road over Kettleman Slough built?

It was built in 1928, making it 97 years old in 2025.

What condition is Davis Road over Kettleman Slough 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 2024.

How much traffic does Davis Road over Kettleman Slough carry?

About 5,015 vehicles per day (2013 count), of which roughly 5% are trucks.

How long is Davis Road over Kettleman Slough?

The structure is 29 ft (8.8 m) long with a longest span of 14 ft (4.3 m) and a deck 27 ft wide.

Who owns Davis Road over Kettleman Slough?

It is owned by the County Highway Agency.