US Bridges

County HWY 91 over Beaver Dam Wash

Good

Mohave County, Arizona · 0.8 MI N JCT I-15 · Structure no. 10660

Built
2009
16 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
411 ft
4 main spans
Daily traffic
3,000
2021 count
Owner
County
County Highway Agency

About this bridge

County HWY 91 over Beaver Dam Wash is a prestressed concrete continuous stringer/multi-beam or girder carrying County HWY 91 over Beaver Dam Wash in Mohave County, Arizona. It was built in 2009, so it is 16 years old, younger 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 3,000 vehicles a day, roughly 5% of them trucks, projected to reach 3,010 by 2041. The structure is 411 ft (125.3 m) long and 58 ft wide. If it were closed, the detour would be 34.8 mi (56 km).

Location

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CarriesCounty HWY 91
CrossesBeaver Dam Wash
Location0.8 MI N JCT I-15
RouteCounty Highway 0
CountyMohave County
StateArizona
Coordinates36.9013, -113.9338
Functional classRural Major Collector

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.1 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length411 ft (125.3 m)
Longest span102 ft (31.1 m)
Deck width58 ft (17.6 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deck20 ft (6.1 m)

Traffic and service

Average daily traffic3,000 (2021)
Projected traffic3,010 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed34.8 mi (56 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 County HWY 91 over Beaver Dam Wash built?

It was built in 2009, making it 16 years old in 2025.

What condition is County HWY 91 over Beaver Dam 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 August 2023.

How much traffic does County HWY 91 over Beaver Dam Wash carry?

About 3,000 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is County HWY 91 over Beaver Dam Wash?

The structure is 411 ft (125.3 m) long with a longest span of 102 ft (31.1 m) and a deck 58 ft wide.

Who owns County HWY 91 over Beaver Dam Wash?

It is owned by the County Highway Agency.