US Bridges

IRR BIA RTE N112 over Bonito Creek

Fair

Apache County, Arizona · South of Fort Defiance · Structure no. 00000000000N663

Built
1985
40 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
129 ft
3 main spans
Daily traffic
3,684
2023 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE N112 over Bonito Creek is a steel continuous stringer/multi-beam or girder carrying IRR BIA RTE N112 over Bonito Creek in Apache County, Arizona. It was built in 1985, so it is 40 years old, younger 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 3,684 vehicles a day, roughly 10% of them trucks, projected to reach 4,310 by 2040. The structure is 129 ft (39.4 m) long and 37 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesIRR BIA RTE N112
CrossesBonito Creek
LocationSouth of Fort Defiance
RouteFederal Lands Road 0N112
CountyApache County
StateArizona
Coordinates35.73936, -109.07406
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length129 ft (39.4 m)
Longest span51 ft (15.6 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,684 (2023)
Projected traffic4,310 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR BIA RTE N112 over Bonito Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is IRR BIA RTE N112 over Bonito Creek 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 April 2023.

How much traffic does IRR BIA RTE N112 over Bonito Creek carry?

About 3,684 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is IRR BIA RTE N112 over Bonito Creek?

The structure is 129 ft (39.4 m) long with a longest span of 51 ft (15.6 m) and a deck 37 ft wide.

Who owns IRR BIA RTE N112 over Bonito Creek?

It is owned by the Bureau of Indian Affairs.