US Bridges

Old SB40 (rte 66) over Johnson Wash

Fair

Mohave County, Arizona · 0.3 MI E JCT I40/BEALE ST · Structure no. 00220

Built
1939
86 years old, rebuilt 1959
Condition
Fair
inspected December 2024
Type
Slab
Concrete Continuous
Length
101 ft
4 main spans
Daily traffic
2,979
2022 count
Owner
State
State Highway Agency

About this bridge

Old SB40 (rte 66) over Johnson Wash is a concrete continuous slab carrying Old SB40 (rte 66) over Johnson Wash in Mohave County, Arizona. It was built in 1939 and reconstructed in 1959, so it is 86 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 2,979 vehicles a day, roughly 4% of them trucks, projected to reach 2,989 by 2042. The structure is 101 ft (30.8 m) long and 76 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesOld SB40 (rte 66)
CrossesJohnson Wash
Location0.3 MI E JCT I40/BEALE ST
RouteState Highway 40
CountyMohave County
StateArizona
Coordinates35.1905, -114.0626
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating33 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length101 ft (30.8 m)
Longest span25 ft (7.6 m)
Deck width76 ft (23.2 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,979 (2022)
Projected traffic2,989 by 2042
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 Old SB40 (rte 66) over Johnson Wash built?

It was built in 1939, making it 86 years old in 2025. It was reconstructed in 1959.

What condition is Old SB40 (rte 66) over Johnson 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 2024.

How much traffic does Old SB40 (rte 66) over Johnson Wash carry?

About 2,979 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Old SB40 (rte 66) over Johnson Wash?

The structure is 101 ft (30.8 m) long with a longest span of 25 ft (7.6 m) and a deck 76 ft wide.

Who owns Old SB40 (rte 66) over Johnson Wash?

It is owned by the State Highway Agency.