US Bridges

I-40 EB over Mackenzie Wash

Good

Mohave County, Arizona · 13.8 MI E JCT SR 95 · Structure no. 01315

Built
1967
58 years old
Condition
Good
inspected May 2024
Type
Slab
Concrete Continuous
Length
210 ft
5 main spans
Daily traffic
7,949
2022 count
Owner
State
State Highway Agency

About this bridge

I-40 EB over Mackenzie Wash is a concrete continuous slab carrying I-40 EB over Mackenzie Wash in Mohave County, Arizona. It was built in 1967, so it is 58 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 7,949 vehicles a day, roughly 55% of them trucks, projected to reach 7,959 by 2042. The structure is 210 ft (64 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI-40 EB
CrossesMackenzie Wash
Location13.8 MI E JCT SR 95
RouteInterstate 40
StateArizona
Coordinates34.8419, -114.1454
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.9 US tons
Inventory rating37 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length210 ft (64 m)
Longest span45 ft (13.7 m)
Deck width40 ft (12.3 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,949 (2022)
Projected traffic7,959 by 2042
Trucks55%
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 Mackenzie Wash built?

It was built in 1967, making it 58 years old in 2025.

What condition is I-40 EB over Mackenzie 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 Mackenzie Wash carry?

About 7,949 vehicles per day (2022 count), of which roughly 55% are trucks.

How long is I-40 EB over Mackenzie Wash?

The structure is 210 ft (64 m) long with a longest span of 45 ft (13.7 m) and a deck 40 ft wide.

Who owns I-40 EB over Mackenzie Wash?

It is owned by the State Highway Agency.