US Bridges

I 8 EB & WB over Canyon Diablo

Fair

Yuma County, Arizona · 40.0 MI W JCT B8 · Structure no. 05261

Built
1956
69 years old, rebuilt 1979
Condition
Fair
inspected March 2023
Type
Culvert
Concrete Continuous
Length
75 ft
6 main spans
Daily traffic
11,016
2022 count
Owner
State
State Highway Agency

About this bridge

I 8 EB & WB over Canyon Diablo is a concrete continuous culvert carrying I 8 EB & WB over Canyon Diablo in Yuma County, Arizona. It was built in 1956 and reconstructed in 1979, so it is 69 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 11,016 vehicles a day, roughly 25% of them trucks, projected to reach 11,026 by 2042. The structure is 75 ft (22.9 m) long. If it were closed, the detour would be 39.8 mi (64 km).

Location

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CarriesI 8 EB & WB
CrossesCanyon Diablo
Location40.0 MI W JCT B8
RouteInterstate 8
CountyYuma County
StateArizona
Coordinates32.82823, -113.41402
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating85 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans6
Design loadHS 20
Structure length75 ft (22.9 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,016 (2022)
Projected traffic11,026 by 2042
Trucks25%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.8 mi (64 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$3,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I 8 EB & WB over Canyon Diablo built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1979.

What condition is I 8 EB & 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 March 2023.

How much traffic does I 8 EB & WB over Canyon Diablo carry?

About 11,016 vehicles per day (2022 count), of which roughly 25% are trucks.

How long is I 8 EB & WB over Canyon Diablo?

The structure is 75 ft (22.9 m) long with a longest span of 10 ft (3 m).

Who owns I 8 EB & WB over Canyon Diablo?

It is owned by the State Highway Agency.