US Bridges

IRR BIA RTE N7140 over Rio Puerco Wash

Fair

McKinley County, New Mexico · 23 MI SW of Gallup Nm · Structure no. 00000000000N420

Built
1972
53 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
250 ft
4 main spans
Daily traffic
178
2023 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE N7140 over Rio Puerco Wash is a prestressed concrete stringer/multi-beam or girder carrying IRR BIA RTE N7140 over Rio Puerco Wash in McKinley County, New Mexico. It was built in 1972, so it is 53 years old, older 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 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 178 vehicles a day, roughly 5% of them trucks, projected to reach 208 by 2043. The structure is 250 ft (76.1 m) long and 35 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

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CarriesIRR BIA RTE N7140
CrossesRio Puerco Wash
Location23 MI SW of Gallup Nm
RouteFederal Lands Road N7140
CountyMcKinley County
StateNew Mexico
Coordinates35.35581, -109.046
Functional classRural Minor Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
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 within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.7 US tons
Inventory rating28.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length250 ft (76.1 m)
Longest span62 ft (18.9 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic178 (2023)
Projected traffic208 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 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 N7140 over Rio Puerco Wash built?

It was built in 1972, making it 53 years old in 2025.

What condition is IRR BIA RTE N7140 over Rio Puerco 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 N7140 over Rio Puerco Wash carry?

About 178 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is IRR BIA RTE N7140 over Rio Puerco Wash?

The structure is 250 ft (76.1 m) long with a longest span of 62 ft (18.9 m) and a deck 35 ft wide.

Who owns IRR BIA RTE N7140 over Rio Puerco Wash?

It is owned by the Bureau of Indian Affairs.