US Bridges

Old 66 over Wash

Fair

Yavapai County, Arizona · 9.5 MI W JCT I-40 · Structure no. 07756

Built
1936
89 years old, rebuilt 1972
Condition
Fair
inspected July 2021
Type
Culvert
Concrete Continuous
Length
43 ft
4 main spans
Daily traffic
1,095
2019 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 1972, 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 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 1,095 vehicles a day, roughly 7% of them trucks, projected to reach 2,005 by 2041. The structure is 43 ft (13.1 m) long. If it were closed, the detour would be 19.3 mi (31 km).

Location

Open in Google Maps
CarriesOld 66
CrossesWash
Location9.5 MI W JCT I-40
RouteCounty Highway 0
CountyYavapai County
StateArizona
Coordinates35.40129, -113.01695
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 traffic1,095 (2019)
Projected traffic2,005 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 1972.

What condition is Old 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 July 2021.

How much traffic does Old 66 over Wash carry?

About 1,095 vehicles per day (2019 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.