US Bridges

NM-400 over I-40 Ebl/Wbl MP 33.6

Fair

McKinley County, New Mexico · Junction I-40/NM-400 · Structure no. 000000000006367

Built
1963
62 years old, rebuilt 1987
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
236 ft
4 main spans
Daily traffic
1,524
2023 count
Owner
State
State Highway Agency

About this bridge

NM-400 over I-40 Ebl/Wbl MP 33.6 is a steel continuous stringer/multi-beam or girder carrying NM-400 over I-40 Ebl/Wbl MP 33.6 in McKinley County, New Mexico. It was built in 1963 and reconstructed in 1987, so it is 62 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 1,524 vehicles a day, roughly 11% of them trucks, projected to reach 2,072 by 2043. The structure is 236 ft (71.9 m) long and 31 ft wide.

Location

Open in Google Maps
CarriesNM-400
CrossesI-40 Ebl/Wbl MP 33.6
LocationJunction I-40/NM-400
RouteState Highway 400
CountyMcKinley County
StateNew Mexico
Coordinates35.5112, -108.54087
Functional classRural Major 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
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
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length236 ft (71.9 m)
Longest span76 ft (23.2 m)
Deck width31 ft (9.6 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,524 (2023)
Projected traffic2,072 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$425,000 (2020 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was NM-400 over I-40 Ebl/Wbl MP 33.6 built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 1987.

What condition is NM-400 over I-40 Ebl/Wbl MP 33.6 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 February 2025.

How much traffic does NM-400 over I-40 Ebl/Wbl MP 33.6 carry?

About 1,524 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is NM-400 over I-40 Ebl/Wbl MP 33.6?

The structure is 236 ft (71.9 m) long with a longest span of 76 ft (23.2 m) and a deck 31 ft wide.

Who owns NM-400 over I-40 Ebl/Wbl MP 33.6?

It is owned by the State Highway Agency.