US Bridges

I 10; EB over Ajo Way

Fair

Pima County, Arizona · 2.0 MI East JCT I 19 · Structure no. 01107

Built
1965
60 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
261 ft
4 main spans
Daily traffic
49,889
2024 count
Owner
State
State Highway Agency

About this bridge

I 10; EB over Ajo Way is a steel continuous stringer/multi-beam or girder carrying I 10; EB over Ajo Way in Pima County, Arizona. It was built in 1965, so it is 60 years old, older 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 49,889 vehicles a day, roughly 14% of them trucks, projected to reach 49,899 by 2042. The structure is 261 ft (79.6 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI 10; EB
CrossesAjo Way
Location2.0 MI East JCT I 19
RouteInterstate 10
CountyPima County
StateArizona
Coordinates32.1781, -110.9464
Functional classUrban Principal Arterial - Interstate

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length261 ft (79.6 m)
Longest span74 ft (22.6 m)
Deck width43 ft (13.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic49,889 (2024)
Projected traffic49,899 by 2042
Trucks14%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 10; EB over Ajo Way built?

It was built in 1965, making it 60 years old in 2025.

What condition is I 10; EB over Ajo Way 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 September 2024.

How much traffic does I 10; EB over Ajo Way carry?

About 49,889 vehicles per day (2024 count), of which roughly 14% are trucks.

How long is I 10; EB over Ajo Way?

The structure is 261 ft (79.6 m) long with a longest span of 74 ft (22.6 m) and a deck 43 ft wide.

Who owns I 10; EB over Ajo Way?

It is owned by the State Highway Agency.