US Bridges

I-25 Nbl/Sbl/Ramp over Unnamed Waterway

Fair

Sandoval County, New Mexico · 4.7 MI N of JCT US-550 · Structure no. 000000000008471

Built
1981
44 years old, rebuilt 1984
Condition
Fair
inspected March 2024
Type
Culvert
Concrete
Length
33 ft
3 main spans
Daily traffic
40,179
2023 count
Owner
State
State Highway Agency

About this bridge

I-25 Nbl/Sbl/Ramp over Unnamed Waterway is a concrete culvert carrying I-25 Nbl/Sbl/Ramp over Unnamed Waterway in Sandoval County, New Mexico. It was built in 1981 and reconstructed in 1984, so it is 44 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 40,179 vehicles a day, roughly 14% of them trucks, projected to reach 54,643 by 2043. The structure is 33 ft (10.1 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-25 Nbl/Sbl/Ramp
CrossesUnnamed Waterway
Location4.7 MI N of JCT US-550
RouteInterstate 25
CountySandoval County
StateNew Mexico
Coordinates35.378, -106.47
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40,179 (2023)
Projected traffic54,643 by 2043
Trucks14%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$720,000 (2030 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-25 Nbl/Sbl/Ramp over Unnamed Waterway built?

It was built in 1981, making it 44 years old in 2025. It was reconstructed in 1984.

What condition is I-25 Nbl/Sbl/Ramp over Unnamed Waterway 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 March 2024.

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

About 40,179 vehicles per day (2023 count), of which roughly 14% are trucks.

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

The structure is 33 ft (10.1 m) long with a longest span of 10 ft (3 m).

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

It is owned by the State Highway Agency.