I-40 EB over Walnut Creek

Good

Mohave County, Arizona · 16.8 MI S JCT US 93 · Structure no. 00367

Built: 1951; 74 years old, rebuilt 1990
Condition: Good; inspected May 2024
Type: Slab; Concrete Continuous
Length: 142 ft; 5 main spans
Daily traffic: 7,999; 2022 count
Owner: State; State Highway Agency

About this bridge

I-40 EB over Walnut Creek is a concrete continuous slab carrying I-40 EB over Walnut Creek in Mohave County, Arizona. It was built in 1951 and reconstructed in 1990, so it is 74 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 7,999 vehicles a day, roughly 42% of them trucks, projected to reach 8,009 by 2042. The structure is 142 ft (43.3 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-40 EB

CrossesWalnut Creek

Location16.8 MI S JCT US 93

RouteInterstate 40

CountyMohave County

StateArizona

Coordinates34.9634, -114.1432

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.

Component	Rating	Meaning
Deck	7 Good	Some minor problems.
Superstructure	7 Good	Some minor problems.
Substructure	7 Good	Some minor problems.
Channel and channel protection	7 Good	Some minor problems.

Last inspectionMay 2024

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation6: Equal to present minimum criteria

Deck geometry9: Superior to present desirable criteria

Waterway adequacy6: Equal to present minimum criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating47 US tons

Inventory rating28 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans5

Design loadHS 20

Structure length142 ft (43.3 m)

Longest span30 ft (9.1 m)

Deck width45 ft (13.8 m)

Roadway width42 ft (12.9 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,999 (2022)

Projected traffic8,009 by 2042

Trucks42%

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 Walnut Creek built?

It was built in 1951, making it 74 years old in 2025. It was reconstructed in 1990.

What condition is I-40 EB over Walnut Creek 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 Walnut Creek carry?

About 7,999 vehicles per day (2022 count), of which roughly 42% are trucks.

How long is I-40 EB over Walnut Creek?

The structure is 142 ft (43.3 m) long with a longest span of 30 ft (9.1 m) and a deck 45 ft wide.

Who owns I-40 EB over Walnut Creek?

It is owned by the State Highway Agency.