I-40 WB over 40B

Good

Yavapai County, Arizona · JCT 40B at Seligman · Structure no. 01260

Built: 1967; 58 years old
Condition: Good; inspected June 2024
Type: Slab; Concrete Continuous
Length: 108 ft; 3 main spans
Daily traffic: 7,474; 2022 count
Owner: State; State Highway Agency

About this bridge

I-40 WB over 40B is a concrete continuous slab carrying I-40 WB over 40B in Yavapai County, Arizona. It was built in 1967, 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 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 7,474 vehicles a day, roughly 24% of them trucks, projected to reach 7,484 by 2042. The structure is 108 ft (32.9 m) long and 41 ft wide.

Location

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CarriesI-40 WB

Crosses40B

LocationJCT 40B at Seligman

RouteInterstate 40

CountyYavapai County

StateArizona

Coordinates35.3105, -112.8558

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.

Component	Rating	Meaning
Deck	7 Good	Some minor problems.
Superstructure	7 Good	Some minor problems.
Substructure	8 Very Good	No problems noted.

Last inspectionJune 2024

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourBridge not over waterway

Structural evaluation7: Better than present minimum criteria

Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is

Approach roadway alignment7: Better than present minimum criteria

Operating rating59 US tons

Inventory rating36 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 width41 ft (12.4 m)

Roadway width37 ft (11.4 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,474 (2022)

Projected traffic7,484 by 2042

Trucks24%

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 WB over 40B built?

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

What condition is I-40 WB over 40B 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 June 2024.

How much traffic does I-40 WB over 40B carry?

About 7,474 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is I-40 WB over 40B?

The structure is 108 ft (32.9 m) long with a longest span of 40 ft (12.2 m) and a deck 41 ft wide.

Who owns I-40 WB over 40B?

It is owned by the State Highway Agency.