US Bridges

Griffith Road over I-40

Good

Mohave County, Arizona · 11.9 MI S JCT US 93 · Structure no. 00928

Built
1967
58 years old
Condition
Good
inspected May 2024
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
343 ft
5 main spans
Daily traffic
539
2022 count
Owner
State
State Highway Agency

About this bridge

Griffith Road over I-40 is a concrete continuous box beam or girders - single or spread carrying Griffith Road over I-40 in Mohave County, Arizona. It was built in 1967, so it is 58 years old, older than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 539 vehicles a day, roughly 5% of them trucks, projected to reach 549 by 2042. The structure is 343 ft (104.5 m) long and 31 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesGriffith Road
CrossesI-40
Location11.9 MI S JCT US 93
RouteCounty Highway 0
CountyMohave County
StateArizona
Coordinates35.0336, -114.131
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating85 US tons
Inventory rating51 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length343 ft (104.5 m)
Longest span89 ft (27.1 m)
Deck width31 ft (9.6 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic539 (2022)
Projected traffic549 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed8.1 mi (13 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Griffith Road over I-40 built?

It was built in 1967, making it 58 years old in 2025.

What condition is Griffith Road over I-40 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does Griffith Road over I-40 carry?

About 539 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Griffith Road over I-40?

The structure is 343 ft (104.5 m) long with a longest span of 89 ft (27.1 m) and a deck 31 ft wide.

Who owns Griffith Road over I-40?

It is owned by the State Highway Agency.