US Bridges

IRR US A89 over House Rock Wash

Fair

Coconino County, Arizona · 16.5 MI E JCT SR 67 · Structure no. 00115

Built
1934
91 years old, rebuilt 1992
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
110 ft
3 main spans
Daily traffic
1,114
2021 count
Owner
State
State Highway Agency

About this bridge

IRR US A89 over House Rock Wash is a steel stringer/multi-beam or girder carrying IRR US A89 over House Rock Wash in Coconino County, Arizona. It was built in 1934 and reconstructed in 1992, so it is 91 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 6 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 1,114 vehicles a day, roughly 7% of them trucks, projected to reach 1,124 by 2041. The structure is 110 ft (33.5 m) long and 47 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

Open in Google Maps
CarriesIRR US A89
CrossesHouse Rock Wash
Location16.5 MI E JCT SR 67
RouteU.S. Route 89
CountyCoconino County
StateArizona
Coordinates36.717, -111.9989
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length110 ft (33.5 m)
Longest span36 ft (11 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,114 (2021)
Projected traffic1,124 by 2041
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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 US A89 over House Rock Wash built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1992.

What condition is IRR US A89 over House Rock 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 US A89 over House Rock Wash carry?

About 1,114 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is IRR US A89 over House Rock Wash?

The structure is 110 ft (33.5 m) long with a longest span of 36 ft (11 m) and a deck 47 ft wide.

Who owns IRR US A89 over House Rock Wash?

It is owned by the State Highway Agency.