US Bridges

I-25 Nbl/Sbl over Unnamed Waterway

Good

Colfax County, New Mexico · 6.3 MI N NM-445/MAXWELL · Structure no. 000000000007218

Built
1969
56 years old, rebuilt 1990
Condition
Good
inspected May 2021
Type
Culvert
Concrete
Length
26 ft
4 main spans
Daily traffic
6,020
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 Colfax County, New Mexico. It was built in 1969 and reconstructed in 1990, so it is 56 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 6,020 vehicles a day, roughly 45% of them trucks, projected to reach 8,187 by 2043. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 31.7 mi (51 km).

Location

Open in Google Maps
CarriesI-25 Nbl/Sbl
CrossesUnnamed Waterway
Location6.3 MI N NM-445/MAXWELL
RouteInterstate 25
CountyColfax County
StateNew Mexico
Coordinates36.62346, -104.51127
Functional classRural Principal Arterial - Interstate

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 inspectionMay 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 rating39.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length26 ft (7.9 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 traffic6,020 (2023)
Projected traffic8,187 by 2043
Trucks45%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.7 mi (51 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 1969, making it 56 years old in 2025. It was reconstructed in 1990.

What condition is I-25 Nbl/Sbl 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 May 2021.

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

About 6,020 vehicles per day (2023 count), of which roughly 45% are trucks.

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

The structure is 26 ft (7.9 m) long with a longest span of 6 ft (1.8 m).

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

It is owned by the State Highway Agency.