US Bridges

I 40; EB & WB & N over Channel a

Fair

Navajo County, Arizona · 8.4 MI E JCT SR 99 · Structure no. 06692

Built
1979
46 years old, rebuilt 2005
Condition
Fair
inspected April 2023
Type
Culvert
Concrete Continuous
Length
44 ft
4 main spans
Daily traffic
22,407
2021 count
Owner
State
State Highway Agency

About this bridge

I 40; EB & WB & N over Channel a is a concrete continuous culvert carrying I 40; EB & WB & N over Channel a in Navajo County, Arizona. It was built in 1979 and reconstructed in 2005, 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 22,407 vehicles a day, roughly 47% of them trucks, projected to reach 22,417 by 2041. The structure is 44 ft (13.4 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesI 40; EB & WB & N
CrossesChannel a
Location8.4 MI E JCT SR 99
RouteInterstate 40
CountyNavajo County
StateArizona
Coordinates35.03885, -110.69339
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans4
Design loadHS 20 + Mod
Structure length44 ft (13.4 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 traffic22,407 (2021)
Projected traffic22,417 by 2041
Trucks47%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I 40; EB & WB & N over Channel a built?

It was built in 1979, making it 46 years old in 2025. It was reconstructed in 2005.

What condition is I 40; EB & WB & N over Channel a 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 April 2023.

How much traffic does I 40; EB & WB & N over Channel a carry?

About 22,407 vehicles per day (2021 count), of which roughly 47% are trucks.

How long is I 40; EB & WB & N over Channel a?

The structure is 44 ft (13.4 m) long with a longest span of 10 ft (3 m).

Who owns I 40; EB & WB & N over Channel a?

It is owned by the State Highway Agency.