US Bridges

I-40 EB over Buck Mtn Wash

Fair

Mohave County, Arizona · 5.2 MI E JCT SR 95 · Structure no. 00378

Built
1969
56 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete Continuous
Length
387 ft
10 main spans
Daily traffic
7,831
2022 count
Owner
State
State Highway Agency

About this bridge

I-40 EB over Buck Mtn Wash is a concrete continuous slab carrying I-40 EB over Buck Mtn Wash in Mohave County, Arizona. It was built in 1969, 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 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 7,831 vehicles a day, roughly 56% of them trucks, projected to reach 7,841 by 2042. The structure is 387 ft (118 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-40 EB
CrossesBuck Mtn Wash
Location5.2 MI E JCT SR 95
RouteInterstate 40
CountyMohave County
StateArizona
Coordinates34.7467, -114.2307
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 protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to 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 rating57 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20
Structure length387 ft (118 m)
Longest span40 ft (12.2 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 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 Buck Mtn Wash built?

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

What condition is I-40 EB over Buck Mtn 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 May 2024.

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

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

How long is I-40 EB over Buck Mtn Wash?

The structure is 387 ft (118 m) long with a longest span of 40 ft (12.2 m) and a deck 41 ft wide.

Who owns I-40 EB over Buck Mtn Wash?

It is owned by the State Highway Agency.