US Bridges

I-25 Sbl over Rio Salado

Fair

Socorro County, New Mexico · 9.6 M N JCT NM-408/I-25 · Structure no. 000000000005960

Built
1958
67 years old, rebuilt 2012
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
506 ft
10 main spans
Daily traffic
12,028
2023 count
Owner
State
State Highway Agency

About this bridge

I-25 Sbl over Rio Salado is a prestressed concrete continuous stringer/multi-beam or girder carrying I-25 Sbl over Rio Salado in Socorro County, New Mexico. It was built in 1958 and reconstructed in 2012, so it is 67 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 5 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 12,028 vehicles a day, roughly 45% of them trucks, projected to reach 16,358 by 2043. The structure is 506 ft (154.2 m) long and 45 ft wide.

CarriesI-25 Sbl
CrossesRio Salado
Location9.6 M N JCT NM-408/I-25
RouteInterstate 25
Coordinates34.29244, -106.89464
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating61.1 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20
Structure length506 ft (154.2 m)
Longest span50 ft (15.2 m)
Deck width45 ft (13.7 m)
Roadway width42 ft (12.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,028 (2023)
Projected traffic16,358 by 2043
Trucks45%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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 statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$700,000 (2020 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-25 Sbl over Rio Salado built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 2012.

What condition is I-25 Sbl over Rio Salado 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 June 2024.

How much traffic does I-25 Sbl over Rio Salado carry?

About 12,028 vehicles per day (2023 count), of which roughly 45% are trucks.

How long is I-25 Sbl over Rio Salado?

The structure is 506 ft (154.2 m) long with a longest span of 50 ft (15.2 m) and a deck 45 ft wide.

Who owns I-25 Sbl over Rio Salado?

It is owned by the State Highway Agency.