US Bridges

IRR SR 66 over Wash

Good

Mohave County, Arizona · 25.3 MI E JCT I 40 · Structure no. 04230

Built
1932
93 years old, rebuilt 1962
Condition
Good
inspected November 2022
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
1,643
2021 count
Owner
State
State Highway Agency

About this bridge

IRR SR 66 over Wash is a concrete continuous culvert carrying IRR SR 66 over Wash in Mohave County, Arizona. It was built in 1932 and reconstructed in 1962, so it is 93 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 1,643 vehicles a day, roughly 15% of them trucks, projected to reach 1,653 by 2041. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 19.3 mi (31 km).

Location

Open in Google Maps
CarriesIRR SR 66
CrossesWash
Location25.3 MI E JCT I 40
RouteState Highway 66
CountyMohave County
StateArizona
Coordinates35.364, -113.704
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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating82 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,643 (2021)
Projected traffic1,653 by 2041
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 IRR SR 66 over Wash built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 1962.

What condition is IRR 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 IRR SR 66 over Wash carry?

About 1,643 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is IRR SR 66 over Wash?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns IRR SR 66 over Wash?

It is owned by the State Highway Agency.