US Bridges

State Route 88 over Calaveras River

Fair

San Joaquin County, California · 10-SJ-088-6.10 · Structure no. 29 0060

Built
1947
78 years old
Condition
Fair
inspected March 2023
Type
Girder and Floorbeam System
Steel
Length
74 ft
1 main span
Daily traffic
6,700
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 88 over Calaveras River is a steel girder and floorbeam system carrying State Route 88 over Calaveras River in San Joaquin County, California. It was built in 1947, so it is 78 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 6,700 vehicles a day, projected to reach 23,889 by 2045. The structure is 74 ft (22.6 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesState Route 88
CrossesCalaveras River
Location10-SJ-088-6.10
RouteState Highway 88
CountySan Joaquin County
StateCalifornia
Coordinates38.0519, -121.188
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2023
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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating49.3 US tons
Inventory rating29.3 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length74 ft (22.6 m)
Longest span68 ft (20.8 m)
Deck width30 ft (9.2 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,700 (2009)
Projected traffic23,889 by 2045
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was State Route 88 over Calaveras River built?

It was built in 1947, making it 78 years old in 2025.

What condition is State Route 88 over Calaveras River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2023.

How much traffic does State Route 88 over Calaveras River carry?

About 6,700 vehicles per day (2009 count).

How long is State Route 88 over Calaveras River?

The structure is 74 ft (22.6 m) long with a longest span of 68 ft (20.8 m) and a deck 30 ft wide.

Who owns State Route 88 over Calaveras River?

It is owned by the State Highway Agency.