US Bridges

IRR BIA RTE N6732 over Dennebito Wash

Fair

Coconino County, Arizona · 15 MI NW of Leupp · Structure no. 00000000000N320

Built
1977
48 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
65 ft
2 main spans
Daily traffic
71
2023 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE N6732 over Dennebito Wash is a steel continuous stringer/multi-beam or girder carrying IRR BIA RTE N6732 over Dennebito Wash in Coconino County, Arizona. It was built in 1977, so it is 48 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 71 vehicles a day, roughly 3% of them trucks, projected to reach 83 by 2043. The structure is 65 ft (19.9 m) long and 12 ft wide. If it were closed, the detour would be 52.2 mi (84 km).

Location

Open in Google Maps
CarriesIRR BIA RTE N6732
CrossesDennebito Wash
Location15 MI NW of Leupp
RouteFederal Lands Road N6732
CountyCoconino County
StateArizona
Coordinates35.4943, -111.13422
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating61.2 US tons
Inventory rating36.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckOpen grating
Main spans2
Design loadUnknown
Structure length65 ft (19.9 m)
Longest span30 ft (9.2 m)
Deck width12 ft (3.7 m)
Roadway width11 ft (3.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic71 (2023)
Projected traffic83 by 2043
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed52.2 mi (84 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Indian Affairs
Maintained byBureau of Indian Affairs
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$555,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR BIA RTE N6732 over Dennebito Wash built?

It was built in 1977, making it 48 years old in 2025.

What condition is IRR BIA RTE N6732 over Dennebito 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 March 2023.

How much traffic does IRR BIA RTE N6732 over Dennebito Wash carry?

About 71 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is IRR BIA RTE N6732 over Dennebito Wash?

The structure is 65 ft (19.9 m) long with a longest span of 30 ft (9.2 m) and a deck 12 ft wide.

Who owns IRR BIA RTE N6732 over Dennebito Wash?

It is owned by the Bureau of Indian Affairs.