US Bridges

NM-371 over Unnamed Waterway

Fair

San Juan County, New Mexico · 35.0 MI S JCT 371 & P · Structure no. 000000000008440

Built
1984
41 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete Continuous
Length
94 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 continuous slab carrying NM-371 over Unnamed Waterway in San Juan County, New Mexico. It was built in 1984, so it is 41 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 94 ft (28.6 m) long and 48 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesNM-371
CrossesUnnamed Waterway
Location35.0 MI S JCT 371 & P
RouteState Highway 371
CountySan Juan County
StateNew Mexico
Coordinates36.25436, -108.27161
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 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 rating75.4 US tons
Inventory rating45.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length94 ft (28.6 m)
Longest span36 ft (11 m)
Deck width48 ft (14.5 m)
Roadway width44 ft (13.4 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$318,000 (2030 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was NM-371 over Unnamed Waterway built?

It was built in 1984, making it 41 years old in 2025.

What condition is NM-371 over Unnamed Waterway 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 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 94 ft (28.6 m) long with a longest span of 36 ft (11 m) and a deck 48 ft wide.

Who owns NM-371 over Unnamed Waterway?

It is owned by the State Highway Agency.