US Bridges

IRR SR 389 over Cottonwood Wash

Fair

Mohave County, Arizona · 2.5 MI West JCT A89 · Structure no. 00890

Built
1965
60 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
199 ft
3 main spans
Daily traffic
3,818
2021 count
Owner
State
State Highway Agency

About this bridge

IRR SR 389 over Cottonwood Wash is a steel continuous stringer/multi-beam or girder carrying IRR SR 389 over Cottonwood Wash in Mohave County, Arizona. It was built in 1965, so it is 60 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 3,818 vehicles a day, roughly 19% of them trucks, projected to reach 3,828 by 2041. The structure is 199 ft (60.7 m) long and 35 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesIRR SR 389
CrossesCottonwood Wash
Location2.5 MI West JCT A89
RouteState Highway 389
CountyMohave County
StateArizona
Coordinates36.928, -112.5642
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64 US tons
Inventory rating38 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length199 ft (60.7 m)
Longest span72 ft (21.9 m)
Deck width35 ft (10.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,818 (2021)
Projected traffic3,828 by 2041
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$1,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR SR 389 over Cottonwood Wash built?

It was built in 1965, making it 60 years old in 2025.

What condition is IRR SR 389 over Cottonwood Wash 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 July 2023.

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

About 3,818 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is IRR SR 389 over Cottonwood Wash?

The structure is 199 ft (60.7 m) long with a longest span of 72 ft (21.9 m) and a deck 35 ft wide.

Who owns IRR SR 389 over Cottonwood Wash?

It is owned by the State Highway Agency.