US Bridges

State Route 99 NB over Route 12 - Kettleman LN

Good

San Joaquin County, California · 10-SJ-099-29.50-LOD · Structure no. 29 0140R

Built
1963
62 years old
Condition
Good
inspected July 2024
Type
Tee Beam
Concrete
Length
74 ft
1 main span
Daily traffic
29,500
2014 count
Owner
State
State Highway Agency

About this bridge

State Route 99 NB over Route 12 - Kettleman LN is a concrete tee beam carrying State Route 99 NB over Route 12 - Kettleman LN in San Joaquin County, California. It was built in 1963, so it is 62 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 29,500 vehicles a day, roughly 13% of them trucks, projected to reach 43,700 by 2042. The structure is 74 ft (22.6 m) long and 40 ft wide.

CarriesState Route 99 NB
CrossesRoute 12 - Kettleman LN
Location10-SJ-099-29.50-LOD
RouteState Highway 99
Coordinates38.11618, -121.25771
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Substructure8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating34.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length74 ft (22.6 m)
Longest span70 ft (21.3 m)
Deck width40 ft (12.1 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,500 (2014)
Projected traffic43,700 by 2042
Trucks13%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was State Route 99 NB over Route 12 - Kettleman LN built?

It was built in 1963, making it 62 years old in 2025.

What condition is State Route 99 NB over Route 12 - Kettleman LN 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 July 2024.

How much traffic does State Route 99 NB over Route 12 - Kettleman LN carry?

About 29,500 vehicles per day (2014 count), of which roughly 13% are trucks.

How long is State Route 99 NB over Route 12 - Kettleman LN?

The structure is 74 ft (22.6 m) long with a longest span of 70 ft (21.3 m) and a deck 40 ft wide.

Who owns State Route 99 NB over Route 12 - Kettleman LN?

It is owned by the State Highway Agency.