US Bridges

IRR SR 66 over Wash

Fair

Mohave County, Arizona · 35.8 MI E JCT I-40 · Structure no. 00134

Built
1934
91 years old, rebuilt 1964
Condition
Fair
inspected November 2024
Type
Slab
Concrete
Length
110 ft
5 main spans
Daily traffic
1,364
2022 count
Owner
State
State Highway Agency

About this bridge

IRR SR 66 over Wash is a concrete slab carrying IRR SR 66 over Wash in Mohave County, Arizona. It was built in 1934 and reconstructed in 1964, 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 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 1,364 vehicles a day, roughly 14% of them trucks, projected to reach 1,374 by 2042. The structure is 110 ft (33.5 m) long and 47 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

Open in Google Maps
CarriesIRR SR 66
CrossesWash
Location35.8 MI E JCT I-40
RouteState Highway 66
CountyMohave County
StateArizona
Coordinates35.4671, -113.6001
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to 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 rating56 US tons
Inventory rating33 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length110 ft (33.5 m)
Longest span22 ft (6.7 m)
Deck width47 ft (14.2 m)
Roadway width44 ft (13.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,364 (2022)
Projected traffic1,374 by 2042
Trucks14%
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 1934, making it 91 years old in 2025. It was reconstructed in 1964.

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 November 2024.

How much traffic does IRR SR 66 over Wash carry?

About 1,364 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is IRR SR 66 over Wash?

The structure is 110 ft (33.5 m) long with a longest span of 22 ft (6.7 m) and a deck 47 ft wide.

Who owns IRR SR 66 over Wash?

It is owned by the State Highway Agency.