US Bridges

NM-51 over Ash Canyon

Good

Sierra County, New Mexico · 5.75 MI E of LOOP-11 T /C · Structure no. 000000000009558

Built
2009
16 years old
Condition
Good
inspected September 2023
Type
Culvert
Concrete
Length
59 ft
4 main spans
Daily traffic
179
2023 count
Owner
State
State Highway Agency

About this bridge

NM-51 over Ash Canyon is a concrete culvert carrying NM-51 over Ash Canyon in Sierra County, New Mexico. It was built in 2009, so it is 16 years old, younger 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 179 vehicles a day, roughly 11% of them trucks, projected to reach 243 by 2043. The structure is 59 ft (18 m) long. If it were closed, the detour would be 9.9 mi (16 km).

CarriesNM-51
CrossesAsh Canyon
Location5.75 MI E of LOOP-11 T /C
RouteState Highway 51
Coordinates33.13559, -107.17969
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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHL 93
Structure length59 ft (18 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 traffic179 (2023)
Projected traffic243 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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-51 over Ash Canyon built?

It was built in 2009, making it 16 years old in 2025.

What condition is NM-51 over Ash Canyon 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 September 2023.

How much traffic does NM-51 over Ash Canyon carry?

About 179 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is NM-51 over Ash Canyon?

The structure is 59 ft (18 m) long with a longest span of 10 ft (3 m).

Who owns NM-51 over Ash Canyon?

It is owned by the State Highway Agency.