US Bridges

I-40 EB over Transcon Lane

Fair

Navajo County, Arizona · 10.3 MI E JCT SR 99 · Structure no. 01779

Built
1979
46 years old, rebuilt 2014
Condition
Fair
inspected May 2023
Type
Tee Beam
Concrete Continuous
Length
121 ft
3 main spans
Daily traffic
12,613
2021 count
Owner
State
State Highway Agency

About this bridge

I-40 EB over Transcon Lane is a concrete continuous tee beam carrying I-40 EB over Transcon Lane in Navajo County, Arizona. It was built in 1979 and reconstructed in 2014, so it is 46 years old, younger 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 12,613 vehicles a day, roughly 45% of them trucks, projected to reach 12,623 by 2041. The structure is 121 ft (36.9 m) long and 45 ft wide.

Location

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CarriesI-40 EB
CrossesTranscon Lane
Location10.3 MI E JCT SR 99
RouteInterstate 40
CountyNavajo County
StateArizona
Coordinates35.0178, -110.6745
Functional classUrban 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.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating43 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length121 ft (36.9 m)
Longest span57 ft (17.4 m)
Deck width45 ft (13.6 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,613 (2021)
Projected traffic12,623 by 2041
Trucks45%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-40 EB over Transcon Lane built?

It was built in 1979, making it 46 years old in 2025. It was reconstructed in 2014.

What condition is I-40 EB over Transcon Lane 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 2023.

How much traffic does I-40 EB over Transcon Lane carry?

About 12,613 vehicles per day (2021 count), of which roughly 45% are trucks.

How long is I-40 EB over Transcon Lane?

The structure is 121 ft (36.9 m) long with a longest span of 57 ft (17.4 m) and a deck 45 ft wide.

Who owns I-40 EB over Transcon Lane?

It is owned by the State Highway Agency.