US Bridges

FR 40; FAS 581 over Johnson Wash

Fair

Mohave County, Arizona · 0.9 MI S JCT I-40 · Structure no. 00245

Built
1939
86 years old
Condition
Fair
inspected December 2024
Type
Slab
Concrete Continuous
Length
99 ft
4 main spans
Daily traffic
650
2022 count
Owner
State
State Highway Agency

About this bridge

FR 40; FAS 581 over Johnson Wash is a concrete continuous slab carrying FR 40; FAS 581 over Johnson Wash in Mohave County, Arizona. It was built in 1939, 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 650 vehicles a day, roughly 5% of them trucks, projected to reach 660 by 2042. The structure is 99 ft (30.2 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesFR 40; FAS 581
CrossesJohnson Wash
Location0.9 MI S JCT I-40
RouteInterstate 40
CountyMohave County
StateArizona
Coordinates35.1891, -114.0617
Functional classUrban Local

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 adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating50 US tons
Inventory rating29 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length99 ft (30.2 m)
Longest span24 ft (7.3 m)
Deck width43 ft (13.2 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic650 (2022)
Projected traffic660 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 FR 40; FAS 581 over Johnson Wash built?

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

What condition is FR 40; FAS 581 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 FR 40; FAS 581 over Johnson Wash carry?

About 650 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is FR 40; FAS 581 over Johnson Wash?

The structure is 99 ft (30.2 m) long with a longest span of 24 ft (7.3 m) and a deck 43 ft wide.

Who owns FR 40; FAS 581 over Johnson Wash?

It is owned by the State Highway Agency.