US Bridges

I-25 Nbl over BNSF Railway

Fair

Laramie County, Wyoming · Colorado Line - Cheyenne · Structure no. AAK

Built
1964
61 years old, rebuilt 1990
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
219 ft
3 main spans
Daily traffic
9,282
2024 count
Owner
State
State Highway Agency

About this bridge

I-25 Nbl over BNSF Railway is a steel stringer/multi-beam or girder carrying I-25 Nbl over BNSF Railway in Laramie County, Wyoming. It was built in 1964 and reconstructed in 1990, so it is 61 years old, older than the Wyoming average of 48.4 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 9,282 vehicles a day, roughly 19% of them trucks, projected to reach 12,995 by 2043. The structure is 219 ft (66.9 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-25 Nbl
CrossesBNSF Railway
LocationColorado Line - Cheyenne
RouteInterstate 25
CountyLaramie County
StateWyoming
Coordinates41.05347, -104.88587
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length219 ft (66.9 m)
Longest span76 ft (23.2 m)
Deck width42 ft (12.8 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,282 (2024)
Projected traffic12,995 by 2043
Trucks19%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-25 Nbl over BNSF Railway built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1990.

What condition is I-25 Nbl over BNSF Railway 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 February 2025.

How much traffic does I-25 Nbl over BNSF Railway carry?

About 9,282 vehicles per day (2024 count), of which roughly 19% are trucks.

How long is I-25 Nbl over BNSF Railway?

The structure is 219 ft (66.9 m) long with a longest span of 76 ft (23.2 m) and a deck 42 ft wide.

Who owns I-25 Nbl over BNSF Railway?

It is owned by the State Highway Agency.