US Bridges

I 8; WB over Wash

Fair

Pinal County, Arizona · 5.6 MI East JCT SR 84 · Structure no. 05316

Built
1962
63 years old
Condition
Fair
inspected February 2025
Type
Culvert
Concrete Continuous
Length
62 ft
5 main spans
Daily traffic
2,696
2015 count
Owner
State
State Highway Agency

About this bridge

I 8; WB over Wash is a concrete continuous culvert carrying I 8; WB over Wash in Pinal County, Arizona. It was built in 1962, so it is 63 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 2,696 vehicles a day, roughly 32% of them trucks, projected to reach 2,706 by 2035. The structure is 62 ft (18.9 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI 8; WB
CrossesWash
Location5.6 MI East JCT SR 84
RouteInterstate 8
CountyPinal County
StateArizona
Coordinates32.8311, -112.0368
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
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 spans5
Design loadHS 20
Structure length62 ft (18.9 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 traffic2,696 (2015)
Projected traffic2,706 by 2035
Trucks32%
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; WB over Wash built?

It was built in 1962, making it 63 years old in 2025.

What condition is I 8; WB 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 February 2025.

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

About 2,696 vehicles per day (2015 count), of which roughly 32% are trucks.

How long is I 8; WB over Wash?

The structure is 62 ft (18.9 m) long with a longest span of 10 ft (3 m).

Who owns I 8; WB over Wash?

It is owned by the State Highway Agency.