US Bridges

Gaffery RD over California Aqueduct

Fair

San Joaquin County, California · 0.4 MI W Koster RD · Structure no. 29C0372

Built
1967
58 years old
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete Continuous
Length
151 ft
2 main spans
Daily traffic
50
2009 count
Owner
State
Other State Agency

About this bridge

Gaffery RD over California Aqueduct is a concrete continuous tee beam carrying Gaffery RD over California Aqueduct in San Joaquin County, California. It was built in 1967, so it is 58 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 50 vehicles a day, projected to reach 98 by 2046. The structure is 151 ft (46 m) long and 26 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesGaffery RD
CrossesCalifornia Aqueduct
Location0.4 MI W Koster RD
RouteCounty Highway 0
Coordinates37.59465, -121.33073
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length151 ft (46 m)
Longest span74 ft (22.6 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2009)
Projected traffic98 by 2046
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther State 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 Gaffery RD over California Aqueduct built?

It was built in 1967, making it 58 years old in 2025.

What condition is Gaffery RD over California Aqueduct 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 June 2024.

How much traffic does Gaffery RD over California Aqueduct carry?

About 50 vehicles per day (2009 count).

How long is Gaffery RD over California Aqueduct?

The structure is 151 ft (46 m) long with a longest span of 74 ft (22.6 m) and a deck 26 ft wide.

Who owns Gaffery RD over California Aqueduct?

It is owned by the Other State Agency and maintained by the County Highway Agency.