US Bridges

I-25 Nbl/Sbl over Unnamed Waterway

Fair

Sierra County, New Mexico · 14.9 MI N of NM-26/HATCH · Structure no. 000000000006629

Built
1965
60 years old
Condition
Fair
inspected March 2023
Type
Culvert
Concrete
Length
41 ft
4 main spans
Daily traffic
7,331
2023 count
Owner
State
State Highway Agency

About this bridge

I-25 Nbl/Sbl over Unnamed Waterway is a concrete culvert carrying I-25 Nbl/Sbl over Unnamed Waterway in Sierra County, New Mexico. It was built in 1965, so it is 60 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 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 7,331 vehicles a day, roughly 45% of them trucks, projected to reach 9,970 by 2043. The structure is 41 ft (12.6 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-25 Nbl/Sbl
CrossesUnnamed Waterway
Location14.9 MI N of NM-26/HATCH
RouteInterstate 25
CountySierra County
StateNew Mexico
Coordinates32.85154, -107.2872
Functional classRural Principal Arterial - Interstate

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 inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.2 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length41 ft (12.6 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 traffic7,331 (2023)
Projected traffic9,970 by 2043
Trucks45%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I-25 Nbl/Sbl over Unnamed Waterway built?

It was built in 1965, making it 60 years old in 2025.

What condition is I-25 Nbl/Sbl 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 March 2023.

How much traffic does I-25 Nbl/Sbl over Unnamed Waterway carry?

About 7,331 vehicles per day (2023 count), of which roughly 45% are trucks.

How long is I-25 Nbl/Sbl over Unnamed Waterway?

The structure is 41 ft (12.6 m) long with a longest span of 10 ft (3 m).

Who owns I-25 Nbl/Sbl over Unnamed Waterway?

It is owned by the State Highway Agency.