US Bridges

IRR SR 66 over Truxton Wash

Fair

Mohave County, Arizona · 38.3 MI E JCT I-40 · Structure no. 00142

Built
1935
90 years old, rebuilt 1962
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
110 ft
3 main spans
Daily traffic
1,368
2021 count
Owner
State
State Highway Agency

About this bridge

IRR SR 66 over Truxton Wash is a steel stringer/multi-beam or girder carrying IRR SR 66 over Truxton Wash in Mohave County, Arizona. It was built in 1935 and reconstructed in 1962, so it is 90 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 5 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 1,368 vehicles a day, roughly 15% of them trucks, projected to reach 1,378 by 2041. The structure is 110 ft (33.5 m) long and 46 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

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CarriesIRR SR 66
CrossesTruxton Wash
Location38.3 MI E JCT I-40
RouteState Highway 66
CountyMohave County
StateArizona
Coordinates35.4864, -113.5601
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.1 US tons
Inventory rating46 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length110 ft (33.5 m)
Longest span36 ft (11 m)
Deck width46 ft (14.1 m)
Roadway width43 ft (13.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,368 (2021)
Projected traffic1,378 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 Truxton Wash built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1962.

What condition is IRR SR 66 over Truxton 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 Truxton Wash carry?

About 1,368 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is IRR SR 66 over Truxton Wash?

The structure is 110 ft (33.5 m) long with a longest span of 36 ft (11 m) and a deck 46 ft wide.

Who owns IRR SR 66 over Truxton Wash?

It is owned by the State Highway Agency.