US Bridges

I 40; WB over Welch Road

Fair

Coconino County, Arizona · 5.4 MI E JCT SR 89 · Structure no. 00812

Built
1965
60 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete Continuous
Length
80 ft
3 main spans
Daily traffic
8,531
2021 count
Owner
State
State Highway Agency

About this bridge

I 40; WB over Welch Road is a concrete continuous slab carrying I 40; WB 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 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 8,531 vehicles a day, roughly 27% of them trucks, projected to reach 8,541 by 2041. The structure is 80 ft (24.4 m) long and 49 ft wide.

Location

Open in Google Maps
CarriesI 40; WB
CrossesWelch Road
Location5.4 MI E JCT SR 89
RouteInterstate 40
CountyCoconino County
StateArizona
Coordinates35.2165, -112.3785
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating39 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length80 ft (24.4 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 traffic8,531 (2021)
Projected traffic8,541 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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$1,000 (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 40; WB over Welch Road built?

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

What condition is I 40; WB over Welch Road 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 September 2024.

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

About 8,531 vehicles per day (2021 count), of which roughly 27% are trucks.

How long is I 40; WB over Welch Road?

The structure is 80 ft (24.4 m) long with a longest span of 30 ft (9.1 m) and a deck 49 ft wide.

Who owns I 40; WB over Welch Road?

It is owned by the State Highway Agency.