US Bridges

NM-554 over Unnamed Waterway

Fair

Rio Arriba County, New Mexico · 9.05 MI E of JCT US-84 · Structure no. 000000000002997

Built
1942
83 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete
Length
40 ft
6 main spans
Daily traffic
1,165
2023 count
Owner
State
State Highway Agency

About this bridge

NM-554 over Unnamed Waterway is a concrete culvert carrying NM-554 over Unnamed Waterway in Rio Arriba County, New Mexico. It was built in 1942, so it is 83 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 1,165 vehicles a day, roughly 11% of them trucks, projected to reach 1,584 by 2043. The structure is 40 ft (12.3 m) long. If it were closed, the detour would be 49.7 mi (80 km).

Location

Open in Google Maps
CarriesNM-554
CrossesUnnamed Waterway
Location9.05 MI E of JCT US-84
RouteState Highway 554
CountyRio Arriba County
StateNew Mexico
Coordinates36.3044, -106.18352
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 inspectionApril 2024
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 adequacy7: Better than present minimum 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 spans6
Design loadH 15
Structure length40 ft (12.3 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 traffic1,165 (2023)
Projected traffic1,584 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.7 mi (80 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-554 over Unnamed Waterway built?

It was built in 1942, making it 83 years old in 2025.

What condition is NM-554 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 2024.

How much traffic does NM-554 over Unnamed Waterway carry?

About 1,165 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is NM-554 over Unnamed Waterway?

The structure is 40 ft (12.3 m) long with a longest span of 6 ft (1.8 m).

Who owns NM-554 over Unnamed Waterway?

It is owned by the State Highway Agency.