US Bridges

Somerton Avenue over West Main Canal

Fair

Yuma County, Arizona · 0.2 MI S JCT 24th ST · Structure no. 09481

Built
1978
47 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
63 ft
1 main span
Daily traffic
5,577
2022 count
Owner
County
County Highway Agency

About this bridge

Somerton Avenue over West Main Canal is a steel stringer/multi-beam or girder carrying Somerton Avenue over West Main Canal in Yuma County, Arizona. It was built in 1978, so it is 47 years old, younger than the Arizona average of 47.8 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 5,577 vehicles a day, roughly 10% of them trucks, projected to reach 5,587 by 2042. The structure is 63 ft (19.2 m) long and 40 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesSomerton Avenue
CrossesWest Main Canal
Location0.2 MI S JCT 24th ST
RouteCounty Highway 0
CountyYuma County
StateArizona
Coordinates32.68019, -114.71044
Functional classRural Minor Arterial

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating43 US tons
Inventory rating25 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length63 ft (19.2 m)
Longest span60 ft (18.3 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,577 (2022)
Projected traffic5,587 by 2042
Trucks10%
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 Somerton Avenue over West Main Canal built?

It was built in 1978, making it 47 years old in 2025.

What condition is Somerton Avenue over West Main 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 June 2023.

How much traffic does Somerton Avenue over West Main Canal carry?

About 5,577 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Somerton Avenue over West Main Canal?

The structure is 63 ft (19.2 m) long with a longest span of 60 ft (18.3 m) and a deck 40 ft wide.

Who owns Somerton Avenue over West Main Canal?

It is owned by the County Highway Agency.