US Bridges

I 8; EB over Wash

Good

Pinal County, Arizona · 8.8 MI W JCT of I-10 · Structure no. 05347

Built
1966
59 years old
Condition
Good
inspected January 2021
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
3,336
2019 count
Owner
State
State Highway Agency

About this bridge

I 8; EB over Wash is a concrete continuous culvert carrying I 8; EB over Wash in Pinal County, Arizona. It was built in 1966, so it is 59 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 3,336 vehicles a day, roughly 33% of them trucks, projected to reach 3,346 by 2039. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 8; EB
CrossesWash
Location8.8 MI W JCT of I-10
RouteInterstate 8
CountyPinal County
StateArizona
Coordinates32.8279, -111.8258
Functional classRural 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 inspectionJanuary 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67 US tons
Inventory rating40 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 traffic3,336 (2019)
Projected traffic3,346 by 2039
Trucks33%
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 8; EB over Wash built?

It was built in 1966, making it 59 years old in 2025.

What condition is I 8; EB 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 January 2021.

How much traffic does I 8; EB over Wash carry?

About 3,336 vehicles per day (2019 count), of which roughly 33% are trucks.

How long is I 8; EB over Wash?

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

Who owns I 8; EB over Wash?

It is owned by the State Highway Agency.