US Bridges

IRR SR 66 over Wash

Fair

Mohave County, Arizona · 0.2 MI N JCT I 40 · Structure no. 04208

Built
1968
57 years old
Condition
Fair
inspected December 2022
Type
Culvert
Concrete Continuous
Length
53 ft
5 main spans
Daily traffic
14,122
2017 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 1968, so it is 57 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 6 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 14,122 vehicles a day, roughly 9% of them trucks, projected to reach 14,132 by 2037. The structure is 53 ft (16.2 m) long and 212 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

Open in Google Maps
CarriesIRR SR 66
CrossesWash
Location0.2 MI N JCT I 40
RouteState Highway 66
CountyMohave County
StateArizona
Coordinates35.21914, -114.01006
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58 US tons
Inventory rating35.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length53 ft (16.2 m)
Longest span10 ft (3 m)
Deck width212 ft (64.6 m)
Roadway width82 ft (25 m)
Vertical clearance over deck20 ft (6.1 m)

Traffic and service

Average daily traffic14,122 (2017)
Projected traffic14,132 by 2037
Trucks9%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed19.3 mi (31 km)
TollOn a free road
National Highway SystemYes

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 1968, making it 57 years old in 2025.

What condition is IRR SR 66 over Wash 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 2022.

How much traffic does IRR SR 66 over Wash carry?

About 14,122 vehicles per day (2017 count), of which roughly 9% are trucks.

How long is IRR SR 66 over Wash?

The structure is 53 ft (16.2 m) long with a longest span of 10 ft (3 m) and a deck 212 ft wide.

Who owns IRR SR 66 over Wash?

It is owned by the State Highway Agency.