US Bridges

I-40 WB over Ruby Wash

Good

Navajo County, Arizona · 3.2 MI W JCT SR 87 · Structure no. 01782

Built
1979
46 years old, rebuilt 2014
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
173 ft
3 main spans
Daily traffic
11,316
2021 count
Owner
State
State Highway Agency

About this bridge

I-40 WB over Ruby Wash is a prestressed concrete continuous stringer/multi-beam or girder carrying I-40 WB over Ruby Wash in Navajo County, Arizona. It was built in 1979 and reconstructed in 2014, 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 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 11,316 vehicles a day, roughly 45% of them trucks, projected to reach 11,326 by 2041. The structure is 173 ft (52.7 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-40 WB
CrossesRuby Wash
Location3.2 MI W JCT SR 87
RouteInterstate 40
CountyNavajo County
StateArizona
Coordinates35.031, -110.6849
Functional classUrban 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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating93 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length173 ft (52.7 m)
Longest span56 ft (17.1 m)
Deck width45 ft (13.6 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,316 (2021)
Projected traffic11,326 by 2041
Trucks45%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-40 WB over Ruby Wash built?

It was built in 1979, making it 46 years old in 2025. It was reconstructed in 2014.

What condition is I-40 WB over Ruby Wash 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 May 2023.

How much traffic does I-40 WB over Ruby Wash carry?

About 11,316 vehicles per day (2021 count), of which roughly 45% are trucks.

How long is I-40 WB over Ruby Wash?

The structure is 173 ft (52.7 m) long with a longest span of 56 ft (17.1 m) and a deck 45 ft wide.

Who owns I-40 WB over Ruby Wash?

It is owned by the State Highway Agency.