US Bridges

I-8 EB over Wash

Fair

Maricopa County, Arizona · 32.5 MI W JCT SR 85 · Structure no. 00317

Built
1930
95 years old, rebuilt 1949
Condition
Fair
inspected February 2025
Type
Slab
Concrete
Length
116 ft
5 main spans
Daily traffic
5,784
2023 count
Owner
State
State Highway Agency

About this bridge

I-8 EB over Wash is a concrete slab carrying I-8 EB over Wash in Maricopa County, Arizona. It was built in 1930 and reconstructed in 1949, so it is 95 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 5,784 vehicles a day, roughly 26% of them trucks, projected to reach 5,794 by 2042. The structure is 116 ft (35.4 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-8 EB
CrossesWash
Location32.5 MI W JCT SR 85
RouteInterstate 8
CountyMaricopa County
StateArizona
Coordinates32.8455, -113.2796
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length116 ft (35.4 m)
Longest span23 ft (7 m)
Deck width45 ft (13.7 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,784 (2023)
Projected traffic5,794 by 2042
Trucks26%
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 1930, making it 95 years old in 2025. It was reconstructed in 1949.

What condition is I-8 EB 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 EB over Wash carry?

About 5,784 vehicles per day (2023 count), of which roughly 26% are trucks.

How long is I-8 EB over Wash?

The structure is 116 ft (35.4 m) long with a longest span of 23 ft (7 m) and a deck 45 ft wide.

Who owns I-8 EB over Wash?

It is owned by the State Highway Agency.