US Bridges

NM-120 over Unnamed Waterway

Fair

Mora County, New Mexico · 7.1 MI E I-25/WAGON Mound · Structure no. 000000000007428

Built
1973
52 years old
Condition
Fair
inspected March 2022
Type
Culvert
Concrete
Length
21 ft
2 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 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 224 vehicles a day, roughly 10% of them trucks, projected to reach 304 by 2043. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 72.1 mi (116 km).

CarriesNM-120
CrossesUnnamed Waterway
Location7.1 MI E I-25/WAGON Mound
RouteState Highway 120
Coordinates36.02169, -104.59163
Functional classRural Major 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 inspectionMarch 2022
Inspection intervalevery 48 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 rating98.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
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 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 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 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 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns NM-120 over Unnamed Waterway?

It is owned by the State Highway Agency.