US Bridges

NM-1 over Unnamed Waterway

Fair

Socorro County, New Mexico · 2.8 Mi. N of JCT NM-107 · Structure no. 000000000003178

Built
1937
88 years old
Condition
Fair
inspected May 2024
Type
Culvert
Concrete
Length
39 ft
6 main spans
Daily traffic
41
2023 count
Owner
State
State Highway Agency

About this bridge

NM-1 over Unnamed Waterway is a concrete culvert carrying NM-1 over Unnamed Waterway in Socorro County, New Mexico. It was built in 1937, so it is 88 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 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 41 vehicles a day, roughly 9% of them trucks, projected to reach 55 by 2043. The structure is 39 ft (12 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesNM-1
CrossesUnnamed Waterway
Location2.8 Mi. N of JCT NM-107
RouteState Highway 1
Coordinates33.66504, -107.08575
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating100 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans6
Design loadHS 20 + Mod
Structure length39 ft (12 m)
Longest span6 ft (1.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41 (2023)
Projected traffic55 by 2043
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was NM-1 over Unnamed Waterway built?

It was built in 1937, making it 88 years old in 2025.

What condition is NM-1 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 May 2024.

How much traffic does NM-1 over Unnamed Waterway carry?

About 41 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is NM-1 over Unnamed Waterway?

The structure is 39 ft (12 m) long with a longest span of 6 ft (1.8 m).

Who owns NM-1 over Unnamed Waterway?

It is owned by the State Highway Agency.