US Bridges

IRR I-40 WB over SR 66

Fair

Mohave County, Arizona · 18.5 MI W JCT US 93 · Structure no. 01358

Built
1969
56 years old
Condition
Fair
inspected December 2024
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
213 ft
2 main spans
Daily traffic
10,482
2021 count
Owner
State
State Highway Agency

About this bridge

IRR I-40 WB over SR 66 is a concrete continuous box beam or girders - single or spread carrying IRR I-40 WB over SR 66 in Mohave County, Arizona. It was built in 1969, so it is 56 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 5 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 10,482 vehicles a day, roughly 30% of them trucks, projected to reach 10,492 by 2041. The structure is 213 ft (64.9 m) long and 43 ft wide.

Location

Open in Google Maps
CarriesIRR I-40 WB
CrossesSR 66
Location18.5 MI W JCT US 93
RouteInterstate 40
CountyMohave County
StateArizona
Coordinates35.2174, -114.011
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating39 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length213 ft (64.9 m)
Longest span105 ft (32 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,482 (2021)
Projected traffic10,492 by 2041
Trucks30%
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$2,000 (2020 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was IRR I-40 WB over SR 66 built?

It was built in 1969, making it 56 years old in 2025.

What condition is IRR I-40 WB over SR 66 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 December 2024.

How much traffic does IRR I-40 WB over SR 66 carry?

About 10,482 vehicles per day (2021 count), of which roughly 30% are trucks.

How long is IRR I-40 WB over SR 66?

The structure is 213 ft (64.9 m) long with a longest span of 105 ft (32 m) and a deck 43 ft wide.

Who owns IRR I-40 WB over SR 66?

It is owned by the State Highway Agency.