US Bridges

NM-61 over Unnamed Waterway

Fair

Grant County, New Mexico · 11.8 M NE Grant-Luna C/L · Structure no. 000000000005331

Built
1948
77 years old
Condition
Fair
inspected January 2023
Type
Culvert
Concrete
Length
22 ft
4 main spans
Daily traffic
436
2023 count
Owner
State
State Highway Agency

About this bridge

NM-61 over Unnamed Waterway is a concrete culvert carrying NM-61 over Unnamed Waterway in Grant County, New Mexico. It was built in 1948, so it is 77 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 436 vehicles a day, roughly 11% of them trucks, projected to reach 592 by 2043. The structure is 22 ft (6.6 m) long. If it were closed, the detour would be 8.1 mi (13 km).

CarriesNM-61
CrossesUnnamed Waterway
Location11.8 M NE Grant-Luna C/L
RouteState Highway 61
Coordinates32.74035, -107.88188
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 inspectionJanuary 2023
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 rating99 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length22 ft (6.6 m)
Longest span5 ft (1.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic436 (2023)
Projected traffic592 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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-61 over Unnamed Waterway built?

It was built in 1948, making it 77 years old in 2025.

What condition is NM-61 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 January 2023.

How much traffic does NM-61 over Unnamed Waterway carry?

About 436 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is NM-61 over Unnamed Waterway?

The structure is 22 ft (6.6 m) long with a longest span of 5 ft (1.5 m).

Who owns NM-61 over Unnamed Waterway?

It is owned by the State Highway Agency.