US Bridges

I 40 over Colorado River

Fair

Mohave County, Arizona · 9.80 MI W of JCT SR 95 · Structure no. 00957

Built
1966
59 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,294 ft
7 main spans
Daily traffic
29,400
2012 count
Owner
State
State Highway Agency

About this bridge

I 40 over Colorado River is a steel continuous stringer/multi-beam or girder carrying I 40 over Colorado River in Mohave County, Arizona. It was built in 1966, so it is 59 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 29,400 vehicles a day, roughly 31% of them trucks, projected to reach 12,410 by 2030. The structure is 1,294 ft (394.4 m) long and 68 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesI 40
CrossesColorado River
Location9.80 MI W of JCT SR 95
RouteInterstate 40
CountyMohave County
StateArizona
Coordinates34.71698, -114.48993
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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.4 US tons
Inventory rating24.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length1,294 ft (394.4 m)
Longest span194 ft (59.1 m)
Deck width68 ft (20.7 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,400 (2012)
Projected traffic12,410 by 2030
Trucks31%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$9,000
NavigationNo navigation control on waterway

Frequently asked questions

When was I 40 over Colorado River built?

It was built in 1966, making it 59 years old in 2025.

What condition is I 40 over Colorado River 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 April 2023.

How much traffic does I 40 over Colorado River carry?

About 29,400 vehicles per day (2012 count), of which roughly 31% are trucks.

How long is I 40 over Colorado River?

The structure is 1,294 ft (394.4 m) long with a longest span of 194 ft (59.1 m) and a deck 68 ft wide.

Who owns I 40 over Colorado River?

It is owned by the State Highway Agency.