US Bridges

IRR BIA RTE N54 over Slick Rock Wash

Fair

McKinley County, New Mexico · S and E of Ft Defiance Az · Structure no. 00000000000N686

Built
2000
25 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete Continuous
Length
54 ft
6 main spans
Daily traffic
261
2023 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE N54 over Slick Rock Wash is a concrete continuous culvert carrying IRR BIA RTE N54 over Slick Rock Wash in McKinley County, New Mexico. It was built in 2000, so it is 25 years old, younger than the New Mexico average of 51.5 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 261 vehicles a day, roughly 10% of them trucks, projected to reach 305 by 2040. The structure is 54 ft (16.5 m) long and 84 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesIRR BIA RTE N54
CrossesSlick Rock Wash
LocationS and E of Ft Defiance Az
RouteFederal Lands Road 0N54
CountyMcKinley County
StateNew Mexico
Coordinates35.72494, -109.01772
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 inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.1 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans6
Design loadHS 20
Structure length54 ft (16.5 m)
Longest span8 ft (2.5 m)
Deck width84 ft (25.6 m)
Roadway width33 ft (10.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic261 (2023)
Projected traffic305 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 N54 over Slick Rock Wash built?

It was built in 2000, making it 25 years old in 2025.

What condition is IRR BIA RTE N54 over Slick 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 March 2023.

How much traffic does IRR BIA RTE N54 over Slick Rock Wash carry?

About 261 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is IRR BIA RTE N54 over Slick Rock Wash?

The structure is 54 ft (16.5 m) long with a longest span of 8 ft (2.5 m) and a deck 84 ft wide.

Who owns IRR BIA RTE N54 over Slick Rock Wash?

It is owned by the Bureau of Indian Affairs.