US Bridges

Gaffery Road over Delta-Mendota Canal

Fair

Stanislaus County, California · 1.5 Miles W of Welty Road · Structure no. 38C0221

Built
1948
77 years old
Condition
Fair
inspected January 2025
Type
Tee Beam
Concrete Continuous
Length
134 ft
3 main spans
Daily traffic
495
2019 count
Owner
County
County Highway Agency

About this bridge

Gaffery Road over Delta-Mendota Canal is a concrete continuous tee beam carrying Gaffery Road over Delta-Mendota Canal in Stanislaus County, California. It was built in 1948, so it is 77 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 495 vehicles a day, roughly 4% of them trucks, projected to reach 557 by 2047. The structure is 134 ft (40.8 m) long and 29 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

Location

Open in Google Maps
CarriesGaffery Road
CrossesDelta-Mendota Canal
Location1.5 Miles W of Welty Road
RouteCounty Highway 0
CountyStanislaus County
StateCalifornia
Coordinates37.59457, -121.31629
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2025
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.3 US tons
Inventory rating19 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length134 ft (40.8 m)
Longest span50 ft (15.1 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic495 (2019)
Projected traffic557 by 2047
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed4.3 mi (7 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Gaffery Road over Delta-Mendota Canal built?

It was built in 1948, making it 77 years old in 2025.

What condition is Gaffery Road over Delta-Mendota Canal 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 January 2025.

How much traffic does Gaffery Road over Delta-Mendota Canal carry?

About 495 vehicles per day (2019 count), of which roughly 4% are trucks.

How long is Gaffery Road over Delta-Mendota Canal?

The structure is 134 ft (40.8 m) long with a longest span of 50 ft (15.1 m) and a deck 29 ft wide.

Who owns Gaffery Road over Delta-Mendota Canal?

It is owned by the County Highway Agency.