US Bridges

I-25 Sbl over NM-320

Fair

Dona Ana County, New Mexico · Dona Ana Interchange · Structure no. 000000000009336

Built
2007
18 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
113 ft
10 main spans
Daily traffic
7,679
2022 count
Owner
State
State Highway Agency

About this bridge

I-25 Sbl over NM-320 is a prestressed concrete stringer/multi-beam or girder carrying I-25 Sbl over NM-320 in Dona Ana County, New Mexico. It was built in 2007, so it is 18 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 7,679 vehicles a day, roughly 5% of them trucks, projected to reach 10,443 by 2042. The structure is 113 ft (34.4 m) long and 43 ft wide.

CarriesI-25 Sbl
CrossesNM-320
LocationDona Ana Interchange
RouteInterstate 25
Coordinates32.39016, -106.80815
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating102.4 US tons
Inventory rating43.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20
Structure length113 ft (34.4 m)
Longest span112 ft (34.1 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,679 (2022)
Projected traffic10,443 by 2042
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 Sbl over NM-320 built?

It was built in 2007, making it 18 years old in 2025.

What condition is I-25 Sbl over NM-320 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 I-25 Sbl over NM-320 carry?

About 7,679 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is I-25 Sbl over NM-320?

The structure is 113 ft (34.4 m) long with a longest span of 112 ft (34.1 m) and a deck 43 ft wide.

Who owns I-25 Sbl over NM-320?

It is owned by the State Highway Agency.