US Bridges

I 40; EB over Welch Road

Good

Coconino County, Arizona · 5.4 MI E JCT SR 89 · Structure no. 00811

Built
1965
60 years old
Condition
Good
inspected September 2024
Type
Slab
Concrete Continuous
Length
84 ft
3 main spans
Daily traffic
9,382
2021 count
Owner
State
State Highway Agency

About this bridge

I 40; EB over Welch Road is a concrete continuous slab carrying I 40; EB over Welch Road in Coconino County, Arizona. It was built in 1965, so it is 60 years old, older than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 9,382 vehicles a day, roughly 27% of them trucks, projected to reach 9,392 by 2041. The structure is 84 ft (25.6 m) long and 49 ft wide.

Location

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CarriesI 40; EB
CrossesWelch Road
Location5.4 MI E JCT SR 89
RouteInterstate 40
CountyCoconino County
StateArizona
Coordinates35.2161, -112.3784
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64 US tons
Inventory rating38 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length84 ft (25.6 m)
Longest span30 ft (9.1 m)
Deck width49 ft (15 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,382 (2021)
Projected traffic9,392 by 2041
Trucks27%
Lanes on structure3
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1,000 (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 40; EB over Welch Road built?

It was built in 1965, making it 60 years old in 2025.

What condition is I 40; EB over Welch Road in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does I 40; EB over Welch Road carry?

About 9,382 vehicles per day (2021 count), of which roughly 27% are trucks.

How long is I 40; EB over Welch Road?

The structure is 84 ft (25.6 m) long with a longest span of 30 ft (9.1 m) and a deck 49 ft wide.

Who owns I 40; EB over Welch Road?

It is owned by the State Highway Agency.