US Bridges

I-25 Nbl/Sbl/Frntg over Unnamed Waterway

Fair

San Miguel County, New Mexico · 0.5 MI N of JCT US-84 · Structure no. 000000000007420

Built
1966
59 years old, rebuilt 1973
Condition
Fair
inspected May 2022
Type
Culvert
Concrete
Length
45 ft
4 main spans
Daily traffic
12,084
2023 count
Owner
State
State Highway Agency

About this bridge

I-25 Nbl/Sbl/Frntg over Unnamed Waterway is a concrete culvert carrying I-25 Nbl/Sbl/Frntg over Unnamed Waterway in San Miguel County, New Mexico. It was built in 1966 and reconstructed in 1973, so it is 59 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 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 12,084 vehicles a day, roughly 45% of them trucks, projected to reach 16,434 by 2043. The structure is 45 ft (13.7 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-25 Nbl/Sbl/Frntg
CrossesUnnamed Waterway
Location0.5 MI N of JCT US-84
RouteInterstate 25
CountySan Miguel County
StateNew Mexico
Coordinates35.52469, -105.24253
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal 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 spans4
Design loadHS 20 + Mod
Structure length45 ft (13.7 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 traffic12,084 (2023)
Projected traffic16,434 by 2043
Trucks45%
Lanes on structure6
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

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

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1973.

What condition is I-25 Nbl/Sbl/Frntg 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 May 2022.

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

About 12,084 vehicles per day (2023 count), of which roughly 45% are trucks.

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

The structure is 45 ft (13.7 m) long with a longest span of 10 ft (3 m).

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

It is owned by the State Highway Agency.