US Bridges

State Route 88 over State Route 99 and Ramps

Good

San Joaquin County, California · 10-SJ-088-0.01 · Structure no. 29 0143

Built
1961
64 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
238 ft
2 main spans
Daily traffic
20,550
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 88 over State Route 99 and Ramps is a steel stringer/multi-beam or girder carrying State Route 88 over State Route 99 and Ramps in San Joaquin County, California. It was built in 1961, so it is 64 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 20,550 vehicles a day, roughly 20% of them trucks, projected to reach 30,365 by 2045. The structure is 238 ft (72.5 m) long and 40 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesState Route 88
CrossesState Route 99 and Ramps
Location10-SJ-088-0.01
RouteState Highway 88
Coordinates37.98433, -121.25047
Functional classUrban Other Principal 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 inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96.5 US tons
Inventory rating57.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20 + Mod
Structure length238 ft (72.5 m)
Longest span78 ft (23.9 m)
Deck width40 ft (12.3 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,550 (2009)
Projected traffic30,365 by 2045
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.1 mi (5 km)
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 88 over State Route 99 and Ramps built?

It was built in 1961, making it 64 years old in 2025.

What condition is State Route 88 over State Route 99 and Ramps 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 March 2023.

How much traffic does State Route 88 over State Route 99 and Ramps carry?

About 20,550 vehicles per day (2009 count), of which roughly 20% are trucks.

How long is State Route 88 over State Route 99 and Ramps?

The structure is 238 ft (72.5 m) long with a longest span of 78 ft (23.9 m) and a deck 40 ft wide.

Who owns State Route 88 over State Route 99 and Ramps?

It is owned by the State Highway Agency.