US Bridges

SR 66 over Wash

Good

Mohave County, Arizona · 9.0 MI NE JCT I 40 · Structure no. 04218

Built
1934
91 years old, rebuilt 1971
Condition
Good
inspected November 2022
Type
Culvert
Concrete Continuous
Length
32 ft
3 main spans
Daily traffic
3,537
2017 count
Owner
State
State Highway Agency

About this bridge

SR 66 over Wash is a concrete continuous culvert carrying SR 66 over Wash in Mohave County, Arizona. It was built in 1934 and reconstructed in 1971, so it is 91 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 3,537 vehicles a day, roughly 15% of them trucks, projected to reach 3,547 by 2037. The structure is 32 ft (9.8 m) long and 50 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

Open in Google Maps
CarriesSR 66
CrossesWash
Location9.0 MI NE JCT I 40
RouteState Highway 66
CountyMohave County
StateArizona
Coordinates35.31942, -113.91172
Functional classRural Major Collector

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 protection7 GoodSome minor problems.
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 geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span10 ft (3 m)
Deck width50 ft (15.2 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,537 (2017)
Projected traffic3,547 by 2037
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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 SR 66 over Wash built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1971.

What condition is SR 66 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 SR 66 over Wash carry?

About 3,537 vehicles per day (2017 count), of which roughly 15% are trucks.

How long is SR 66 over Wash?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3 m) and a deck 50 ft wide.

Who owns SR 66 over Wash?

It is owned by the State Highway Agency.