US Bridges

I-40 EB over SR 77

Fair

Navajo County, Arizona · At JCT SR 77 · Structure no. 00903

Built
1967
58 years old, rebuilt 2012
Condition
Fair
inspected June 2023
Type
Slab
Concrete Continuous
Length
108 ft
3 main spans
Daily traffic
11,655
2021 count
Owner
State
State Highway Agency

About this bridge

I-40 EB over SR 77 is a concrete continuous slab carrying I-40 EB over SR 77 in Navajo County, Arizona. It was built in 1967 and reconstructed in 2012, so it is 58 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 11,655 vehicles a day, roughly 42% of them trucks, projected to reach 11,665 by 2041. The structure is 108 ft (32.9 m) long and 45 ft wide.

Location

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CarriesI-40 EB
CrossesSR 77
LocationAt JCT SR 77
RouteInterstate 40
CountyNavajo County
StateArizona
Coordinates34.9732, -110.0869
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 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 alignment6: Equal to present minimum criteria
Operating rating99 US tons
Inventory rating78 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length108 ft (32.9 m)
Longest span40 ft (12.2 m)
Deck width45 ft (13.7 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,655 (2021)
Projected traffic11,665 by 2041
Trucks42%
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 SR 77 built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2012.

What condition is I-40 EB over SR 77 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 June 2023.

How much traffic does I-40 EB over SR 77 carry?

About 11,655 vehicles per day (2021 count), of which roughly 42% are trucks.

How long is I-40 EB over SR 77?

The structure is 108 ft (32.9 m) long with a longest span of 40 ft (12.2 m) and a deck 45 ft wide.

Who owns I-40 EB over SR 77?

It is owned by the State Highway Agency.