US Bridges

NM-122 over Unnamed Waterway

Fair

McKinley County, New Mexico · 1.2 MI W of NM-371 · Structure no. 000000000003056

Built
1936
89 years old, rebuilt 1943
Condition
Fair
inspected December 2023
Type
Culvert
Concrete
Length
46 ft
7 main spans
Daily traffic
419
2023 count
Owner
State
State Highway Agency

About this bridge

NM-122 over Unnamed Waterway is a concrete culvert carrying NM-122 over Unnamed Waterway in McKinley County, New Mexico. It was built in 1936 and reconstructed in 1943, so it is 89 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 5 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 419 vehicles a day, roughly 11% of them trucks, projected to reach 569 by 2043. The structure is 46 ft (13.9 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNM-122
CrossesUnnamed Waterway
Location1.2 MI W of NM-371
RouteState Highway 122
Coordinates35.40152, -108.24653
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.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.5 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans7
Design loadH 15
Structure length46 ft (13.9 m)
Longest span6 ft (1.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic419 (2023)
Projected traffic569 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$173,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was NM-122 over Unnamed Waterway built?

It was built in 1936, making it 89 years old in 2025. It was reconstructed in 1943.

What condition is NM-122 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 December 2023.

How much traffic does NM-122 over Unnamed Waterway carry?

About 419 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is NM-122 over Unnamed Waterway?

The structure is 46 ft (13.9 m) long with a longest span of 6 ft (1.8 m).

Who owns NM-122 over Unnamed Waterway?

It is owned by the State Highway Agency.