US Bridges

I-25 Sbl over BNSF Railway

Fair

Laramie County, Wyoming · Cheyenne Marginal · Structure no. ABF

Built
1958
67 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
191 ft
3 main spans
Daily traffic
14,483
2024 count
Owner
State
State Highway Agency

About this bridge

I-25 Sbl over BNSF Railway is a steel stringer/multi-beam or girder carrying I-25 Sbl over BNSF Railway in Laramie County, Wyoming. It was built in 1958, so it is 67 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 14,483 vehicles a day, roughly 8% of them trucks, projected to reach 20,276 by 2043. The structure is 191 ft (58.2 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-25 Sbl
CrossesBNSF Railway
LocationCheyenne Marginal
RouteInterstate 25
CountyLaramie County
StateWyoming
Coordinates41.13944, -104.84019
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.8 US tons
Inventory rating36.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length191 ft (58.2 m)
Longest span86 ft (26.1 m)
Deck width45 ft (13.7 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,483 (2024)
Projected traffic20,276 by 2043
Trucks8%
Lanes on structure3
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 Sbl over BNSF Railway built?

It was built in 1958, making it 67 years old in 2025.

What condition is I-25 Sbl 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 April 2023.

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

About 14,483 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is I-25 Sbl over BNSF Railway?

The structure is 191 ft (58.2 m) long with a longest span of 86 ft (26.1 m) and a deck 45 ft wide.

Who owns I-25 Sbl over BNSF Railway?

It is owned by the State Highway Agency.