US Bridges

NM-120 over Unnamed Waterway

Good

Mora County, New Mexico · 9.3 MI E I-25/WAGON Mound · Structure no. 000000000007429

Built
1973
52 years old
Condition
Good
inspected March 2022
Type
Culvert
Concrete
Length
34 ft
4 main spans
Daily traffic
224
2023 count
Owner
State
State Highway Agency

About this bridge

NM-120 over Unnamed Waterway is a concrete culvert carrying NM-120 over Unnamed Waterway in Mora County, New Mexico. It was built in 1973, so it is 52 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 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 224 vehicles a day, roughly 10% of them trucks, projected to reach 304 by 2043. The structure is 34 ft (10.4 m) long. If it were closed, the detour would be 72.1 mi (116 km).

CarriesNM-120
CrossesUnnamed Waterway
Location9.3 MI E I-25/WAGON Mound
RouteState Highway 120
Coordinates36.0153, -104.5533
Functional classRural Major Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2022
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 rating42.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length34 ft (10.4 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 traffic224 (2023)
Projected traffic304 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed72.1 mi (116 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-120 over Unnamed Waterway built?

It was built in 1973, making it 52 years old in 2025.

What condition is NM-120 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 March 2022.

How much traffic does NM-120 over Unnamed Waterway carry?

About 224 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is NM-120 over Unnamed Waterway?

The structure is 34 ft (10.4 m) long with a longest span of 8 ft (2.4 m).

Who owns NM-120 over Unnamed Waterway?

It is owned by the State Highway Agency.