US Bridges

I-10 over Wash

Fair

Pima County, Arizona · 21.0 MI E JCT SR B10 · Structure no. 05561

Built
1955
70 years old, rebuilt 1961
Condition
Fair
inspected November 2021
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
24,549
2020 count
Owner
State
State Highway Agency

About this bridge

I-10 over Wash is a concrete continuous culvert carrying I-10 over Wash in Pima County, Arizona. It was built in 1955 and reconstructed in 1961, so it is 70 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 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 24,549 vehicles a day, roughly 33% of them trucks, projected to reach 24,559 by 2040. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-10
CrossesWash
Location21.0 MI E JCT SR B10
RouteInterstate 10
CountyPima County
StateArizona
Coordinates31.9879, -110.5864
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,549 (2020)
Projected traffic24,559 by 2040
Trucks33%
Lanes on structure4
Traffic directionTwo-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 over Wash built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1961.

What condition is I-10 over Wash 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 2021.

How much traffic does I-10 over Wash carry?

About 24,549 vehicles per day (2020 count), of which roughly 33% are trucks.

How long is I-10 over Wash?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns I-10 over Wash?

It is owned by the State Highway Agency.