US Bridges

I-25 Nbl over Local RD 51Z004/MUD Sprg

Fair

Sierra County, New Mexico · 0.7 M N Williamsburg · Structure no. 000000000007103

Built
1970
55 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
195 ft
3 main spans
Daily traffic
5,858
2023 count
Owner
State
State Highway Agency

About this bridge

I-25 Nbl over Local RD 51Z004/MUD Sprg is a prestressed concrete stringer/multi-beam or girder carrying I-25 Nbl over Local RD 51Z004/MUD Sprg in Sierra County, New Mexico. It was built in 1970, so it is 55 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 5,858 vehicles a day, roughly 45% of them trucks, projected to reach 7,966 by 2043. The structure is 195 ft (59.4 m) long and 41 ft wide.

CarriesI-25 Nbl
CrossesLocal RD 51Z004/MUD Sprg
Location0.7 M N Williamsburg
RouteInterstate 25
Coordinates33.12297, -107.29372
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.7 US tons
Inventory rating33.3 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length195 ft (59.4 m)
Longest span63 ft (19.2 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,858 (2023)
Projected traffic7,966 by 2043
Trucks45%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
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 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 over Local RD 51Z004/MUD Sprg built?

It was built in 1970, making it 55 years old in 2025.

What condition is I-25 Nbl over Local RD 51Z004/MUD Sprg 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 over Local RD 51Z004/MUD Sprg carry?

About 5,858 vehicles per day (2023 count), of which roughly 45% are trucks.

How long is I-25 Nbl over Local RD 51Z004/MUD Sprg?

The structure is 195 ft (59.4 m) long with a longest span of 63 ft (19.2 m) and a deck 41 ft wide.

Who owns I-25 Nbl over Local RD 51Z004/MUD Sprg?

It is owned by the State Highway Agency.