US Bridges

IRR SR 389 over Cottonwood Wash

Good

Mohave County, Arizona · 27.1 MI W JCT US a 89 · Structure no. 05134

Built
1967
58 years old
Condition
Good
inspected July 2021
Type
Culvert
Concrete Continuous
Length
64 ft
6 main spans
Daily traffic
2,434
2019 count
Owner
State
State Highway Agency

About this bridge

IRR SR 389 over Cottonwood Wash is a concrete continuous culvert carrying IRR SR 389 over Cottonwood Wash 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 2,434 vehicles a day, roughly 20% of them trucks, projected to reach 2,444 by 2039. The structure is 64 ft (19.5 m) long. If it were closed, the detour would be 60.3 mi (97 km).

Location

Open in Google Maps
CarriesIRR SR 389
CrossesCottonwood Wash
Location27.1 MI W JCT US a 89
RouteState Highway 389
CountyMohave County
StateArizona
Coordinates36.9331, -112.9453
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating86 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans6
Design loadHS 20
Structure length64 ft (19.5 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,434 (2019)
Projected traffic2,444 by 2039
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed60.3 mi (97 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR SR 389 over Cottonwood Wash built?

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

What condition is IRR SR 389 over Cottonwood 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 July 2021.

How much traffic does IRR SR 389 over Cottonwood Wash carry?

About 2,434 vehicles per day (2019 count), of which roughly 20% are trucks.

How long is IRR SR 389 over Cottonwood Wash?

The structure is 64 ft (19.5 m) long with a longest span of 10 ft (3 m).

Who owns IRR SR 389 over Cottonwood Wash?

It is owned by the State Highway Agency.