US Bridges

I-10 over Wash

Good

Pima County, Arizona · 9.2 MI W JCT SR B10 · Structure no. 05551

Built
1950
75 years old, rebuilt 1960
Condition
Good
inspected December 2021
Type
Culvert
Concrete Continuous
Length
38 ft
3 main spans
Daily traffic
175,000
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 1950 and reconstructed in 1960, so it is 75 years old, older than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 175,000 vehicles a day, roughly 9% of them trucks, projected to reach 175,010 by 2040. The structure is 38 ft (11.6 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-10
CrossesWash
Location9.2 MI W JCT SR B10
RouteInterstate 10
CountyPima County
StateArizona
Coordinates32.2276, -110.9818
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 spans3
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic175,000 (2020)
Projected traffic175,010 by 2040
Trucks9%
Lanes on structure14
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I-10 over Wash built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1960.

What condition is I-10 over Wash in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2021.

How much traffic does I-10 over Wash carry?

About 175,000 vehicles per day (2020 count), of which roughly 9% are trucks.

How long is I-10 over Wash?

The structure is 38 ft (11.6 m) long with a longest span of 12 ft (3.7 m).

Who owns I-10 over Wash?

It is owned by the State Highway Agency.