US Bridges

I-25 Nbl over San Lorenzo Arroyo

Fair

Socorro County, New Mexico · 4.8 M N JCT NM-408/I-25 · Structure no. 000000000005839

Built
1958
67 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete Continuous
Length
153 ft
5 main spans
Daily traffic
12,116
2023 count
Owner
State
State Highway Agency

About this bridge

I-25 Nbl over San Lorenzo Arroyo is a concrete continuous slab carrying I-25 Nbl over San Lorenzo Arroyo in Socorro County, New Mexico. It was built in 1958, 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 12,116 vehicles a day, roughly 45% of them trucks, projected to reach 16,477 by 2043. The structure is 153 ft (46.6 m) long and 42 ft wide.

Location

Open in Google Maps
CarriesI-25 Nbl
CrossesSan Lorenzo Arroyo
Location4.8 M N JCT NM-408/I-25
RouteInterstate 25
CountySocorro County
StateNew Mexico
Coordinates34.22551, -106.91901
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.1 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length153 ft (46.6 m)
Longest span33 ft (10.1 m)
Deck width42 ft (12.8 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,116 (2023)
Projected traffic16,477 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-25 Nbl over San Lorenzo Arroyo built?

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

What condition is I-25 Nbl over San Lorenzo Arroyo 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 July 2023.

How much traffic does I-25 Nbl over San Lorenzo Arroyo carry?

About 12,116 vehicles per day (2023 count), of which roughly 45% are trucks.

How long is I-25 Nbl over San Lorenzo Arroyo?

The structure is 153 ft (46.6 m) long with a longest span of 33 ft (10.1 m) and a deck 42 ft wide.

Who owns I-25 Nbl over San Lorenzo Arroyo?

It is owned by the State Highway Agency.