US Bridges

I-40 WB over Canyon Diablo

Fair

Coconino County, Arizona · 15.5 MI W JCT SR 99 · Structure no. 00845

Built
1965
60 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
238 ft
3 main spans
Daily traffic
10,693
2022 count
Owner
State
State Highway Agency

About this bridge

I-40 WB over Canyon Diablo is a steel continuous stringer/multi-beam or girder carrying I-40 WB over Canyon Diablo in Coconino County, Arizona. It was built in 1965, so it is 60 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 10,693 vehicles a day, roughly 43% of them trucks, projected to reach 10,703 by 2042. The structure is 238 ft (72.5 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-40 WB
CrossesCanyon Diablo
Location15.5 MI W JCT SR 99
RouteInterstate 40
CountyCoconino County
StateArizona
Coordinates35.1177, -111.1003
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating66 US tons
Inventory rating39 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length238 ft (72.5 m)
Longest span104 ft (31.7 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,693 (2022)
Projected traffic10,703 by 2042
Trucks43%
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 WB over Canyon Diablo built?

It was built in 1965, making it 60 years old in 2025.

What condition is I-40 WB over Canyon Diablo 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 October 2024.

How much traffic does I-40 WB over Canyon Diablo carry?

About 10,693 vehicles per day (2022 count), of which roughly 43% are trucks.

How long is I-40 WB over Canyon Diablo?

The structure is 238 ft (72.5 m) long with a longest span of 104 ft (31.7 m) and a deck 34 ft wide.

Who owns I-40 WB over Canyon Diablo?

It is owned by the State Highway Agency.