US Bridges

I-25 Sbl/Nbl over Unnamed Waterway

Poor

Sierra County, New Mexico · 6.6 MI N of Dona Ana Cl · Structure no. 000000000006633

Built
1965
60 years old
Condition
Poor
inspected March 2024
Type
Culvert
Concrete
Length
23 ft
2 main spans
Daily traffic
7,331
2023 count
Owner
State
State Highway Agency

About this bridge

I-25 Sbl/Nbl over Unnamed Waterway is a concrete culvert carrying I-25 Sbl/Nbl over Unnamed Waterway in Sierra County, New Mexico. It was built in 1965, so it is 60 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 7,331 vehicles a day, roughly 45% of them trucks, projected to reach 9,970 by 2043. The structure is 23 ft (7 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-25 Sbl/Nbl
CrossesUnnamed Waterway
Location6.6 MI N of Dona Ana Cl
RouteInterstate 25
CountySierra County
StateNew Mexico
Coordinates32.8664, -107.2905
Functional classRural Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.2 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length23 ft (7 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,331 (2023)
Projected traffic9,970 by 2043
Trucks45%
Lanes on structure4
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$300,000 (2030 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

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

It was built in 1965, making it 60 years old in 2025.

What condition is I-25 Sbl/Nbl over Unnamed Waterway in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2024.

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

About 7,331 vehicles per day (2023 count), of which roughly 45% are trucks.

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

The structure is 23 ft (7 m) long with a longest span of 8 ft (2.4 m).

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

It is owned by the State Highway Agency.