US Bridges

NM-250 over Unnamed Waterway

Fair

San Miguel County, New Mexico · 0.4 MI NE of I-25 · Structure no. 000000000008454

Built
1982
43 years old
Condition
Fair
inspected November 2021
Type
Culvert
Concrete
Length
21 ft
3 main spans
Daily traffic
512
2023 count
Owner
State
State Highway Agency

About this bridge

NM-250 over Unnamed Waterway is a concrete culvert carrying NM-250 over Unnamed Waterway in San Miguel County, New Mexico. It was built in 1982, so it is 43 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 512 vehicles a day, roughly 12% of them trucks, projected to reach 696 by 2043. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesNM-250
CrossesUnnamed Waterway
Location0.4 MI NE of I-25
RouteState Highway 250
CountySan Miguel County
StateNew Mexico
Coordinates35.62786, -105.19844
Functional classRural Minor 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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length21 ft (6.4 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 traffic512 (2023)
Projected traffic696 by 2043
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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-250 over Unnamed Waterway built?

It was built in 1982, making it 43 years old in 2025.

What condition is NM-250 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 November 2021.

How much traffic does NM-250 over Unnamed Waterway carry?

About 512 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is NM-250 over Unnamed Waterway?

The structure is 21 ft (6.4 m) long with a longest span of 6 ft (1.8 m).

Who owns NM-250 over Unnamed Waterway?

It is owned by the State Highway Agency.