US Bridges

Old 66 over Wash

Good

Yavapai County, Arizona · 7.5 MI W of JCT I 40 · Structure no. 07757

Built
1936
89 years old, rebuilt 1967
Condition
Good
inspected July 2023
Type
Culvert
Concrete Continuous
Length
43 ft
4 main spans
Daily traffic
409
2021 count
Owner
County
County Highway Agency

About this bridge

Old 66 over Wash is a concrete continuous culvert carrying Old 66 over Wash in Yavapai County, Arizona. It was built in 1936 and reconstructed in 1967, so it is 89 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 409 vehicles a day, roughly 7% of them trucks, projected to reach 419 by 2041. The structure is 43 ft (13.1 m) long. If it were closed, the detour would be 19.3 mi (31 km).

CarriesOld 66
CrossesWash
Location7.5 MI W of JCT I 40
RouteCounty Highway 0
StateArizona
Coordinates35.38278, -112.988
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 protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2023
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 rating57 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans4
Design loadHS 20
Structure length43 ft (13.1 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 traffic409 (2021)
Projected traffic419 by 2041
Trucks7%
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

OwnerCounty Highway Agency
Maintained byCounty 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 Old 66 over Wash built?

It was built in 1936, making it 89 years old in 2025. It was reconstructed in 1967.

What condition is Old 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 July 2023.

How much traffic does Old 66 over Wash carry?

About 409 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is Old 66 over Wash?

The structure is 43 ft (13.1 m) long with a longest span of 10 ft (3 m).

Who owns Old 66 over Wash?

It is owned by the County Highway Agency.