US Bridges

I-40 EB over Illavar Wash

Good

Mohave County, Arizona · 8.5 MI E JCT SR 95 · Structure no. 01310

Built
1969
56 years old, rebuilt 2016
Condition
Good
inspected May 2024
Type
Slab
Concrete Continuous
Length
93 ft
3 main spans
Daily traffic
7,831
2022 count
Owner
State
State Highway Agency

About this bridge

I-40 EB over Illavar Wash is a concrete continuous slab carrying I-40 EB over Illavar Wash in Mohave County, Arizona. It was built in 1969 and reconstructed in 2016, so it is 56 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 7,831 vehicles a day, roughly 56% of them trucks, projected to reach 7,841 by 2042. The structure is 93 ft (28.3 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-40 EB
CrossesIllavar Wash
Location8.5 MI E JCT SR 95
RouteInterstate 40
CountyMohave County
StateArizona
Coordinates34.7775, -114.1843
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating70 US tons
Inventory rating42 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length93 ft (28.3 m)
Longest span35 ft (10.7 m)
Deck width42 ft (12.8 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,831 (2022)
Projected traffic7,841 by 2042
Trucks56%
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-40 EB over Illavar Wash built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 2016.

What condition is I-40 EB over Illavar 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 May 2024.

How much traffic does I-40 EB over Illavar Wash carry?

About 7,831 vehicles per day (2022 count), of which roughly 56% are trucks.

How long is I-40 EB over Illavar Wash?

The structure is 93 ft (28.3 m) long with a longest span of 35 ft (10.7 m) and a deck 42 ft wide.

Who owns I-40 EB over Illavar Wash?

It is owned by the State Highway Agency.