US Bridges

Alamo Road over I 40

Fair

Mohave County, Arizona · 15.4 MI East JCT SR 95 · Structure no. 01316

Built
1969
56 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
248 ft
4 main spans
Daily traffic
329
2022 count
Owner
State
State Highway Agency

About this bridge

Alamo Road over I 40 is a steel continuous stringer/multi-beam or girder carrying Alamo Road over I 40 in Mohave County, Arizona. It was built in 1969, so it is 56 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 329 vehicles a day, roughly 5% of them trucks, projected to reach 339 by 2042. The structure is 248 ft (75.6 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesAlamo Road
CrossesI 40
Location15.4 MI East JCT SR 95
RouteCounty Highway 0
CountyMohave County
StateArizona
Coordinates34.8645, -114.1475
Functional classRural 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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length248 ft (75.6 m)
Longest span81 ft (24.7 m)
Deck width33 ft (10.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic329 (2022)
Projected traffic339 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 Alamo Road over I 40 built?

It was built in 1969, making it 56 years old in 2025.

What condition is Alamo Road over I 40 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 August 2024.

How much traffic does Alamo Road over I 40 carry?

About 329 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Alamo Road over I 40?

The structure is 248 ft (75.6 m) long with a longest span of 81 ft (24.7 m) and a deck 33 ft wide.

Who owns Alamo Road over I 40?

It is owned by the State Highway Agency.