US Bridges

NM-161 over I-25 Nbl/Sbl

Good

Mora County, New Mexico · Junction I-25/NM-161 · Structure no. 000000000007008

Built
1969
56 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
223 ft
4 main spans
Daily traffic
115
2023 count
Owner
State
State Highway Agency

About this bridge

NM-161 over I-25 Nbl/Sbl is a prestressed concrete stringer/multi-beam or girder carrying NM-161 over I-25 Nbl/Sbl in Mora County, New Mexico. It was built in 1969, 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 115 vehicles a day, roughly 11% of them trucks, projected to reach 156 by 2043. The structure is 223 ft (68 m) long and 34 ft wide.

CarriesNM-161
CrossesI-25 Nbl/Sbl
LocationJunction I-25/NM-161
RouteState Highway 161
Coordinates35.808, -104.97919
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length223 ft (68 m)
Longest span70 ft (21.3 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic115 (2023)
Projected traffic156 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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-161 over I-25 Nbl/Sbl built?

It was built in 1969, making it 56 years old in 2025.

What condition is NM-161 over I-25 Nbl/Sbl 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 November 2024.

How much traffic does NM-161 over I-25 Nbl/Sbl carry?

About 115 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is NM-161 over I-25 Nbl/Sbl?

The structure is 223 ft (68 m) long with a longest span of 70 ft (21.3 m) and a deck 34 ft wide.

Who owns NM-161 over I-25 Nbl/Sbl?

It is owned by the State Highway Agency.