US Bridges

NM-371 over De-Na-Zin Canyon

Fair

San Juan County, New Mexico · 37.6 MI S JCT 371 & P · Structure no. 000000000008430

Built
1985
40 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete Continuous
Length
184 ft
5 main spans
Daily traffic
2,653
2023 count
Owner
State
State Highway Agency

About this bridge

NM-371 over De-Na-Zin Canyon is a concrete continuous slab carrying NM-371 over De-Na-Zin Canyon in San Juan County, New Mexico. It was built in 1985, so it is 40 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 2,653 vehicles a day, roughly 11% of them trucks, projected to reach 3,608 by 2043. The structure is 184 ft (56.1 m) long and 43 ft wide. If it were closed, the detour would be 60.3 mi (97 km).

Location

Open in Google Maps
CarriesNM-371
CrossesDe-Na-Zin Canyon
Location37.6 MI S JCT 371 & P
RouteState Highway 371
CountySan Juan County
StateNew Mexico
Coordinates36.21902, -108.26954
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.1 US tons
Inventory rating39 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length184 ft (56.1 m)
Longest span40 ft (12.2 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,653 (2023)
Projected traffic3,608 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed60.3 mi (97 km)
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was NM-371 over De-Na-Zin Canyon built?

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

What condition is NM-371 over De-Na-Zin Canyon 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 August 2023.

How much traffic does NM-371 over De-Na-Zin Canyon carry?

About 2,653 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is NM-371 over De-Na-Zin Canyon?

The structure is 184 ft (56.1 m) long with a longest span of 40 ft (12.2 m) and a deck 43 ft wide.

Who owns NM-371 over De-Na-Zin Canyon?

It is owned by the State Highway Agency.