US Bridges

NM-90 over Unnamed Waterway

Fair

Grant County, New Mexico · 30.5 Me E of JCT US-70 · Structure no. 000000000005104

Built
1941
84 years old
Condition
Fair
inspected August 2024
Type
Culvert
Concrete
Length
46 ft
5 main spans
Daily traffic
2,640
2023 count
Owner
State
State Highway Agency

About this bridge

NM-90 over Unnamed Waterway is a concrete culvert carrying NM-90 over Unnamed Waterway in Grant County, New Mexico. It was built in 1941, so it is 84 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 5 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 2,640 vehicles a day, roughly 11% of them trucks, projected to reach 3,590 by 2043. The structure is 46 ft (14 m) long. If it were closed, the detour would be 82 mi (132 km).

Location

Open in Google Maps
CarriesNM-90
CrossesUnnamed Waterway
Location30.5 Me E of JCT US-70
RouteState Highway 90
CountyGrant County
StateNew Mexico
Coordinates32.62954, -108.34495
Functional classRural Minor Arterial

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.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.6 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans5
Design loadHS 20
Structure length46 ft (14 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 traffic2,640 (2023)
Projected traffic3,590 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed82 mi (132 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-90 over Unnamed Waterway built?

It was built in 1941, making it 84 years old in 2025.

What condition is NM-90 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 August 2024.

How much traffic does NM-90 over Unnamed Waterway carry?

About 2,640 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is NM-90 over Unnamed Waterway?

The structure is 46 ft (14 m) long with a longest span of 6 ft (1.8 m).

Who owns NM-90 over Unnamed Waterway?

It is owned by the State Highway Agency.