US Bridges

I 10; EB & WB over Wash

Good

Pinal County, Arizona · 5.6 MI SE JCT SR 187 · Structure no. 05470

Built
1968
57 years old, rebuilt 1975
Condition
Good
inspected March 2023
Type
Culvert
Concrete Continuous
Length
45 ft
3 main spans
Daily traffic
41,481
2017 count
Owner
State
State Highway Agency

About this bridge

I 10; EB & WB over Wash is a concrete continuous culvert carrying I 10; EB & WB over Wash in Pinal County, Arizona. It was built in 1968 and reconstructed in 1975, so it is 57 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 41,481 vehicles a day, roughly 19% of them trucks, projected to reach 41,491 by 2037. The structure is 45 ft (13.7 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesI 10; EB & WB
CrossesWash
Location5.6 MI SE JCT SR 187
RouteInterstate 10
CountyPinal County
StateArizona
Coordinates32.9355, -111.6987
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 inspectionMarch 2023
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 rating84 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length45 ft (13.7 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 traffic41,481 (2017)
Projected traffic41,491 by 2037
Trucks19%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$2,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I 10; EB & WB over Wash built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1975.

What condition is I 10; EB & WB 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 March 2023.

How much traffic does I 10; EB & WB over Wash carry?

About 41,481 vehicles per day (2017 count), of which roughly 19% are trucks.

How long is I 10; EB & WB over Wash?

The structure is 45 ft (13.7 m) long with a longest span of 10 ft (3 m).

Who owns I 10; EB & WB over Wash?

It is owned by the State Highway Agency.