US Bridges

Azusa Road over San Juan Canal

Fair

Merced County, California · 0.5 MI E of SR 33 · Structure no. 39C0054

Built
1922
103 years old, rebuilt 1942
Condition
Fair
inspected November 2024
Type
Slab
Concrete Continuous
Length
52 ft
3 main spans
Daily traffic
500
1990 count
Owner
County
County Highway Agency

About this bridge

Azusa Road over San Juan Canal is a concrete continuous slab carrying Azusa Road over San Juan Canal in Merced County, California. It was built in 1922 and reconstructed in 1942, so it is 103 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 6 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 500 vehicles a day, roughly 3% of them trucks, projected to reach 965 by 2042. The structure is 52 ft (15.8 m) long and 40 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesAzusa Road
CrossesSan Juan Canal
Location0.5 MI E of SR 33
RouteCounty Highway 0
CountyMerced County
StateCalifornia
Coordinates37.04786, -120.62647
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length52 ft (15.8 m)
Longest span17 ft (5.2 m)
Deck width40 ft (12.3 m)
Roadway width38 ft (11.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (1990)
Projected traffic965 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway 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 Azusa Road over San Juan Canal built?

It was built in 1922, making it 103 years old in 2025. It was reconstructed in 1942.

What condition is Azusa Road over San Juan 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 November 2024.

How much traffic does Azusa Road over San Juan Canal carry?

About 500 vehicles per day (1990 count), of which roughly 3% are trucks.

How long is Azusa Road over San Juan Canal?

The structure is 52 ft (15.8 m) long with a longest span of 17 ft (5.2 m) and a deck 40 ft wide.

Who owns Azusa Road over San Juan Canal?

It is owned by the County Highway Agency.