US Bridges

I-10 EB over Davidson Canyon

Fair

Pima County, Arizona · 2.7 MI E JCT SR 83 · Structure no. 01784

Built
1981
44 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
324 ft
4 main spans
Daily traffic
15,649
2022 count
Owner
State
State Highway Agency

About this bridge

I-10 EB over Davidson Canyon is a prestressed concrete continuous stringer/multi-beam or girder carrying I-10 EB over Davidson Canyon in Pima County, Arizona. It was built in 1981, so it is 44 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 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 15,649 vehicles a day, roughly 30% of them trucks, projected to reach 15,659 by 2042. The structure is 324 ft (98.8 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-10 EB
CrossesDavidson Canyon
Location2.7 MI E JCT SR 83
RouteInterstate 10
CountyPima County
StateArizona
Coordinates31.997, -110.64644
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length324 ft (98.8 m)
Longest span81 ft (24.7 m)
Deck width45 ft (13.8 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,649 (2022)
Projected traffic15,659 by 2042
Trucks30%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-10 EB over Davidson Canyon built?

It was built in 1981, making it 44 years old in 2025.

What condition is I-10 EB over Davidson Canyon 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 2024.

How much traffic does I-10 EB over Davidson Canyon carry?

About 15,649 vehicles per day (2022 count), of which roughly 30% are trucks.

How long is I-10 EB over Davidson Canyon?

The structure is 324 ft (98.8 m) long with a longest span of 81 ft (24.7 m) and a deck 45 ft wide.

Who owns I-10 EB over Davidson Canyon?

It is owned by the State Highway Agency.