US Bridges

I-40 WB over Franconia Wash

Fair

Mohave County, Arizona · 3.8 MI E JCT SR 95 · Structure no. 00377

Built
1951
74 years old, rebuilt 1972
Condition
Fair
inspected May 2024
Type
Slab
Concrete Continuous
Length
164 ft
7 main spans
Daily traffic
7,302
2022 count
Owner
State
State Highway Agency

About this bridge

I-40 WB over Franconia Wash is a concrete continuous slab carrying I-40 WB over Franconia Wash in Mohave County, Arizona. It was built in 1951 and reconstructed in 1972, so it is 74 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 7,302 vehicles a day, roughly 56% of them trucks, projected to reach 7,312 by 2042. The structure is 164 ft (50 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-40 WB
CrossesFranconia Wash
Location3.8 MI E JCT SR 95
RouteInterstate 40
CountyMohave County
StateArizona
Coordinates34.7372, -114.2509
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 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 geometry8: Equal to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42 US tons
Inventory rating25 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length164 ft (50 m)
Longest span25 ft (7.6 m)
Deck width45 ft (13.6 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,302 (2022)
Projected traffic7,312 by 2042
Trucks56%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I-40 WB over Franconia Wash built?

It was built in 1951, making it 74 years old in 2025. It was reconstructed in 1972.

What condition is I-40 WB over Franconia 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 May 2024.

How much traffic does I-40 WB over Franconia Wash carry?

About 7,302 vehicles per day (2022 count), of which roughly 56% are trucks.

How long is I-40 WB over Franconia Wash?

The structure is 164 ft (50 m) long with a longest span of 25 ft (7.6 m) and a deck 45 ft wide.

Who owns I-40 WB over Franconia Wash?

It is owned by the State Highway Agency.