US Bridges

NM-356 over Unnamed Waterway

Fair

Grant County, New Mexico · 2.05 MI NE of JCT US-180 · Structure no. 000000000007633

Built
1974
51 years old
Condition
Fair
inspected April 2023
Type
Culvert
Steel
Length
28 ft
1 main span
Daily traffic
2,366
2023 count
Owner
State
State Highway Agency

About this bridge

NM-356 over Unnamed Waterway is a steel culvert carrying NM-356 over Unnamed Waterway in Grant County, New Mexico. It was built in 1974, so it is 51 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 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 2,366 vehicles a day, roughly 11% of them trucks, projected to reach 3,217 by 2043. The structure is 28 ft (8.6 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesNM-356
CrossesUnnamed Waterway
Location2.05 MI NE of JCT US-180
RouteState Highway 356
Coordinates32.77623, -108.12082
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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 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 rating84.5 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadH 15
Structure length28 ft (8.6 m)
Longest span28 ft (8.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,366 (2023)
Projected traffic3,217 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was NM-356 over Unnamed Waterway built?

It was built in 1974, making it 51 years old in 2025.

What condition is NM-356 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 April 2023.

How much traffic does NM-356 over Unnamed Waterway carry?

About 2,366 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is NM-356 over Unnamed Waterway?

The structure is 28 ft (8.6 m) long with a longest span of 28 ft (8.6 m).

Who owns NM-356 over Unnamed Waterway?

It is owned by the State Highway Agency.