US Bridges

NM-371 over Unnamed Waterway

Good

San Juan County, New Mexico · 52.5 MI N of JCT I-40 · Structure no. 000000000007978

Built
1979
46 years old
Condition
Good
inspected September 2023
Type
Culvert
Concrete
Length
27 ft
3 main spans
Daily traffic
2,653
2023 count
Owner
State
State Highway Agency

About this bridge

NM-371 over Unnamed Waterway is a concrete culvert carrying NM-371 over Unnamed Waterway in San Juan County, New Mexico. It was built in 1979, so it is 46 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,653 vehicles a day, roughly 11% of them trucks, projected to reach 3,608 by 2043. The structure is 27 ft (8.2 m) long. If it were closed, the detour would be 98.8 mi (159 km).

CarriesNM-371
CrossesUnnamed Waterway
Location52.5 MI N of JCT I-40
RouteState Highway 371
Coordinates36.0662, -108.20558
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length27 ft (8.2 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 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 closed98.8 mi (159 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$167,000 (2020 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was NM-371 over Unnamed Waterway built?

It was built in 1979, making it 46 years old in 2025.

What condition is NM-371 over Unnamed Waterway in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does NM-371 over Unnamed Waterway carry?

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

How long is NM-371 over Unnamed Waterway?

The structure is 27 ft (8.2 m) long with a longest span of 8 ft (2.4 m).

Who owns NM-371 over Unnamed Waterway?

It is owned by the State Highway Agency.