US Bridges

US 93 over Bronco Wash

Good

Mohave County, Arizona · 34.8 MI S JCT I-40 · Structure no. 00666

Built
1961
64 years old
Condition
Good
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
186 ft
3 main spans
Daily traffic
5,214
2022 count
Owner
State
State Highway Agency

About this bridge

US 93 over Bronco Wash is a prestressed concrete stringer/multi-beam or girder carrying US 93 over Bronco Wash in Mohave County, Arizona. It was built in 1961, so it is 64 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 5,214 vehicles a day, roughly 24% of them trucks, projected to reach 5,224 by 2042. The structure is 186 ft (56.7 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 93
CrossesBronco Wash
Location34.8 MI S JCT I-40
RouteU.S. Route 93
StateArizona
Coordinates34.6763, -113.5915
Functional classRural Principal Arterial - Other

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.
Superstructure8 Very GoodNo problems noted.
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 evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating44 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length186 ft (56.7 m)
Longest span61 ft (18.6 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,214 (2022)
Projected traffic5,224 by 2042
Trucks24%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 93 over Bronco Wash built?

It was built in 1961, making it 64 years old in 2025.

What condition is US 93 over Bronco Wash 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 December 2024.

How much traffic does US 93 over Bronco Wash carry?

About 5,214 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is US 93 over Bronco Wash?

The structure is 186 ft (56.7 m) long with a longest span of 61 ft (18.6 m) and a deck 35 ft wide.

Who owns US 93 over Bronco Wash?

It is owned by the State Highway Agency.