US Bridges

IRR SR 389 over Two Mile Wash

Fair

Mohave County, Arizona · 11.1 MI West JCT A89 · Structure no. 00889

Built
1965
60 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
128 ft
2 main spans
Daily traffic
3,398
2021 count
Owner
State
State Highway Agency

About this bridge

IRR SR 389 over Two Mile Wash is a steel continuous stringer/multi-beam or girder carrying IRR SR 389 over Two Mile 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 3,398 vehicles a day, roughly 12% of them trucks, projected to reach 3,408 by 2041. The structure is 128 ft (39 m) long and 39 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesIRR SR 389
CrossesTwo Mile Wash
Location11.1 MI West JCT A89
RouteState Highway 389
CountyMohave County
StateArizona
Coordinates36.86666, -112.6974
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68 US tons
Inventory rating41 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length128 ft (39 m)
Longest span62 ft (18.9 m)
Deck width39 ft (11.9 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,398 (2021)
Projected traffic3,408 by 2041
Trucks12%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR SR 389 over Two Mile Wash built?

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

What condition is IRR SR 389 over Two Mile 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 Two Mile Wash carry?

About 3,398 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is IRR SR 389 over Two Mile Wash?

The structure is 128 ft (39 m) long with a longest span of 62 ft (18.9 m) and a deck 39 ft wide.

Who owns IRR SR 389 over Two Mile Wash?

It is owned by the State Highway Agency.