US Bridges

NM-1 over Unnamed Waterway

Fair

Socorro County, New Mexico · .3 Miles West of 100 of O · Structure no. 000000000003189

Built
1937
88 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
27
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 27 vehicles a day, roughly 11% of them trucks, projected to reach 36 by 2043. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNM-1
CrossesUnnamed Waterway
Location.3 Miles West of 100 of O
RouteState Highway 1
CountySocorro County
StateNew Mexico
Coordinates33.52836, -107.19693
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating46.8 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 15
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27 (2023)
Projected traffic36 by 2043
Trucks11%
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$10,000
NavigationNo navigation control on 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 2023.

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

About 27 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is NM-1 over Unnamed Waterway?

The structure is 21 ft (6.4 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.