US Bridges

NM-456 over Unnamed Waterway

Good

Union County, New Mexico · 27.8 MI N NM-325/FOLSOM · Structure no. 000000000009071

Built
1997
28 years old
Condition
Good
inspected April 2022
Type
Culvert
Concrete
Length
42 ft
4 main spans
Daily traffic
73
2023 count
Owner
State
State Highway Agency

About this bridge

NM-456 over Unnamed Waterway is a concrete culvert carrying NM-456 over Unnamed Waterway in Union County, New Mexico. It was built in 1997, so it is 28 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 73 vehicles a day, roughly 10% of them trucks, projected to reach 99 by 2043. The structure is 42 ft (12.8 m) long. If it were closed, the detour would be 62.1 mi (100 km).

CarriesNM-456
CrossesUnnamed Waterway
Location27.8 MI N NM-325/FOLSOM
RouteState Highway 456
Coordinates36.9478, -103.50564
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 protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionApril 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 rating41.1 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length42 ft (12.8 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 traffic73 (2023)
Projected traffic99 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed62.1 mi (100 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-456 over Unnamed Waterway built?

It was built in 1997, making it 28 years old in 2025.

What condition is NM-456 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 April 2022.

How much traffic does NM-456 over Unnamed Waterway carry?

About 73 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is NM-456 over Unnamed Waterway?

The structure is 42 ft (12.8 m) long with a longest span of 10 ft (3 m).

Who owns NM-456 over Unnamed Waterway?

It is owned by the State Highway Agency.