US Bridges

IRR BIA RTE N12 over Black Creek Wash

Fair

Apache County, Arizona · 8.5 MI North of Lupton Az · Structure no. 00000000000N612

Built
1973
52 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
145 ft
2 main spans
Daily traffic
2,590
2023 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE N12 over Black Creek Wash is a prestressed concrete continuous stringer/multi-beam or girder carrying IRR BIA RTE N12 over Black Creek Wash in Apache County, Arizona. It was built in 1973, so it is 52 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 2,590 vehicles a day, roughly 10% of them trucks, projected to reach 3,030 by 2043. The structure is 145 ft (44.1 m) long and 39 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

CarriesIRR BIA RTE N12
CrossesBlack Creek Wash
Location8.5 MI North of Lupton Az
RouteFederal Lands Road 0N12
StateArizona
Coordinates35.45403, -109.12536
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.
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; 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 rating49.1 US tons
Inventory rating35.9 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length145 ft (44.1 m)
Longest span70 ft (21.2 m)
Deck width39 ft (11.8 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,590 (2023)
Projected traffic3,030 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.8 mi (64 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 N12 over Black Creek Wash built?

It was built in 1973, making it 52 years old in 2025.

What condition is IRR BIA RTE N12 over Black Creek 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 N12 over Black Creek Wash carry?

About 2,590 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is IRR BIA RTE N12 over Black Creek Wash?

The structure is 145 ft (44.1 m) long with a longest span of 70 ft (21.2 m) and a deck 39 ft wide.

Who owns IRR BIA RTE N12 over Black Creek Wash?

It is owned by the Bureau of Indian Affairs.