US Bridges

IRR SR 66 WB over Wash

Good

Mohave County, Arizona · 3.7 MI E JCT I 40 · Structure no. 04212

Built
1936
89 years old, rebuilt 1944
Condition
Good
inspected November 2022
Type
Culvert
Concrete Continuous
Length
87 ft
8 main spans
Daily traffic
9,495
2022 count
Owner
State
State Highway Agency

About this bridge

IRR SR 66 WB over Wash is a concrete continuous culvert carrying IRR SR 66 WB over Wash in Mohave County, Arizona. It was built in 1936 and reconstructed in 1944, so it is 89 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 9,495 vehicles a day, roughly 8% of them trucks, projected to reach 9,505 by 2042. The structure is 87 ft (26.5 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIRR SR 66 WB
CrossesWash
Location3.7 MI E JCT I 40
RouteState Highway 66
CountyMohave County
StateArizona
Coordinates35.25965, -113.97266
Functional classUrban Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionNovember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating35.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20
Structure length87 ft (26.5 m)
Longest span10 ft (3 m)
Deck width50 ft (15.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,495 (2022)
Projected traffic9,505 by 2042
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 IRR SR 66 WB over Wash built?

It was built in 1936, making it 89 years old in 2025. It was reconstructed in 1944.

What condition is IRR SR 66 WB over 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 November 2022.

How much traffic does IRR SR 66 WB over Wash carry?

About 9,495 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is IRR SR 66 WB over Wash?

The structure is 87 ft (26.5 m) long with a longest span of 10 ft (3 m) and a deck 50 ft wide.

Who owns IRR SR 66 WB over Wash?

It is owned by the State Highway Agency.