US Bridges

I 10; WB over Cornfield Canyon

Fair

Cochise County, Arizona · 3.3 MI W of SR 90 · Structure no. 00073

Built
1931
94 years old, rebuilt 1942
Condition
Fair
inspected February 2023
Type
Slab
Concrete
Length
88 ft
4 main spans
Daily traffic
10,934
2021 count
Owner
State
State Highway Agency

About this bridge

I 10; WB over Cornfield Canyon is a concrete slab carrying I 10; WB over Cornfield Canyon in Cochise County, Arizona. It was built in 1931 and reconstructed in 1942, so it is 94 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 5 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 10,934 vehicles a day, roughly 23% of them trucks, projected to reach 10,944 by 2041. The structure is 88 ft (26.8 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI 10; WB
CrossesCornfield Canyon
Location3.3 MI W of SR 90
RouteInterstate 10
CountyCochise County
StateArizona
Coordinates31.9632, -110.4013
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating24 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length88 ft (26.8 m)
Longest span22 ft (6.7 m)
Deck width40 ft (12.2 m)
Roadway width37 ft (11.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,934 (2021)
Projected traffic10,944 by 2041
Trucks23%
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$650,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I 10; WB over Cornfield Canyon built?

It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1942.

What condition is I 10; WB over Cornfield Canyon 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 February 2023.

How much traffic does I 10; WB over Cornfield Canyon carry?

About 10,934 vehicles per day (2021 count), of which roughly 23% are trucks.

How long is I 10; WB over Cornfield Canyon?

The structure is 88 ft (26.8 m) long with a longest span of 22 ft (6.7 m) and a deck 40 ft wide.

Who owns I 10; WB over Cornfield Canyon?

It is owned by the State Highway Agency.