US Bridges

NM-1 over Unnamed Waterway

Fair

Socorro County, New Mexico · 3.7M-E&NOF Sn Marcial Ext · Structure no. 000000000003165

Built
1931
94 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete
Length
20 ft
2 main spans
Daily traffic
174
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 1931, so it is 94 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 174 vehicles a day, roughly 10% of them trucks, projected to reach 236 by 2043. The structure is 20 ft (6.2 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesNM-1
CrossesUnnamed Waterway
Location3.7M-E&NOF Sn Marcial Ext
RouteState Highway 1
Coordinates33.74257, -106.96207
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 inspectionSeptember 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 alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 15
Structure length20 ft (6.2 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic174 (2023)
Projected traffic236 by 2043
Trucks10%
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$9,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was NM-1 over Unnamed Waterway built?

It was built in 1931, making it 94 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 September 2024.

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

About 174 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is NM-1 over Unnamed Waterway?

The structure is 20 ft (6.2 m) long with a longest span of 10 ft (3 m).

Who owns NM-1 over Unnamed Waterway?

It is owned by the State Highway Agency.