US Bridges

I-25 Sbl over BNSF Railway

Fair

Converse County, Wyoming · Douglas Marginal · Structure no. AFW

Built
1967
58 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
120 ft
3 main spans
Daily traffic
4,416
2024 count
Owner
State
State Highway Agency

About this bridge

I-25 Sbl over BNSF Railway is a steel continuous stringer/multi-beam or girder carrying I-25 Sbl over BNSF Railway in Converse County, Wyoming. It was built in 1967, so it is 58 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 4,416 vehicles a day, roughly 25% of them trucks, projected to reach 6,182 by 2043. The structure is 120 ft (36.6 m) long and 41 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
LocationDouglas Marginal
RouteInterstate 25
CountyConverse County
StateWyoming
Coordinates42.7375, -105.38005
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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.8 US tons
Inventory rating33.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length120 ft (36.6 m)
Longest span46 ft (14 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,416 (2024)
Projected traffic6,182 by 2043
Trucks25%
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 Sbl over BNSF Railway built?

It was built in 1967, making it 58 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 4,416 vehicles per day (2024 count), of which roughly 25% are trucks.

How long is I-25 Sbl over BNSF Railway?

The structure is 120 ft (36.6 m) long with a longest span of 46 ft (14 m) and a deck 41 ft wide.

Who owns I-25 Sbl over BNSF Railway?

It is owned by the State Highway Agency.