US Bridges

IRR US 89A over Bridge Culvert

Fair

Coconino County, Arizona · 8.1 MI N JCT US 89 · Structure no. 05200

Built
1934
91 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete Continuous
Length
24 ft
2 main spans
Daily traffic
929
2019 count
Owner
State
State Highway Agency

About this bridge

IRR US 89A over Bridge Culvert is a concrete continuous culvert carrying IRR US 89A over Bridge Culvert in Coconino County, Arizona. It was built in 1934, 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 929 vehicles a day, roughly 18% of them trucks, projected to reach 939 by 2039. The structure is 24 ft (7.3 m) long and 26 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesIRR US 89A
CrossesBridge Culvert
Location8.1 MI N JCT US 89
RouteU.S. Route 89
CountyCoconino County
StateArizona
Coordinates36.746, -111.6366
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating55 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span10 ft (3 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic929 (2019)
Projected traffic939 by 2039
Trucks18%
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR US 89A over Bridge Culvert built?

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

What condition is IRR US 89A over Bridge Culvert 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 September 2024.

How much traffic does IRR US 89A over Bridge Culvert carry?

About 929 vehicles per day (2019 count), of which roughly 18% are trucks.

How long is IRR US 89A over Bridge Culvert?

The structure is 24 ft (7.3 m) long with a longest span of 10 ft (3 m) and a deck 26 ft wide.

Who owns IRR US 89A over Bridge Culvert?

It is owned by the State Highway Agency.