US Bridges

Turner Road over State Route 99

Good

San Joaquin County, California · 10-SJ-099-31.58-LOD · Structure no. 29 0144

Built
1963
62 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
267 ft
2 main spans
Daily traffic
11,000
2012 count
Owner
State
State Highway Agency

About this bridge

Turner Road over State Route 99 is a prestressed concrete continuous stringer/multi-beam or girder carrying Turner Road over State Route 99 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 11,000 vehicles a day, roughly 6% of them trucks, projected to reach 12,911 by 2042. The structure is 267 ft (81.4 m) long and 40 ft wide.

CarriesTurner Road
CrossesState Route 99
Location10-SJ-099-31.58-LOD
RouteCity Street 0Y308
Coordinates38.14571, -121.26167
Functional classUrban Minor Arterial

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.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating39.7 US tons
Inventory rating27.9 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length267 ft (81.4 m)
Longest span84 ft (25.6 m)
Deck width40 ft (12.3 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,000 (2012)
Projected traffic12,911 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

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 Turner Road over State Route 99 built?

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

What condition is Turner Road over State Route 99 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 Turner Road over State Route 99 carry?

About 11,000 vehicles per day (2012 count), of which roughly 6% are trucks.

How long is Turner Road over State Route 99?

The structure is 267 ft (81.4 m) long with a longest span of 84 ft (25.6 m) and a deck 40 ft wide.

Who owns Turner Road over State Route 99?

It is owned by the State Highway Agency.