US Bridges

NM-612 over Unnamed Waterway

Good

McKinley County, New Mexico · 0.1M S of I-40@ Thoreau · Structure no. 000000000006505

Built
1963
62 years old
Condition
Good
inspected September 2021
Type
Culvert
Concrete
Length
32 ft
3 main spans
Daily traffic
626
2023 count
Owner
State
State Highway Agency

About this bridge

NM-612 over Unnamed Waterway is a concrete culvert carrying NM-612 over Unnamed Waterway in McKinley County, New Mexico. It was built in 1963, so it is 62 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 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 626 vehicles a day, roughly 11% of them trucks, projected to reach 851 by 2043. The structure is 32 ft (9.8 m) long.

CarriesNM-612
CrossesUnnamed Waterway
Location0.1M S of I-40@ Thoreau
RouteState Highway 612
Coordinates35.39575, -108.22441
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 2021
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 spans3
Design loadHS 20
Structure length32 ft (9.8 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 traffic626 (2023)
Projected traffic851 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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-612 over Unnamed Waterway built?

It was built in 1963, making it 62 years old in 2025.

What condition is NM-612 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 September 2021.

How much traffic does NM-612 over Unnamed Waterway carry?

About 626 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is NM-612 over Unnamed Waterway?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3 m).

Who owns NM-612 over Unnamed Waterway?

It is owned by the State Highway Agency.