US Bridges

I-25 Sbl over BNSF Railway

Fair

Platte County, Wyoming · Cheyenne - Chugwater · Structure no. ACZ

Built
1969
56 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
275 ft
3 main spans
Daily traffic
3,404
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 Platte County, Wyoming. It was built in 1969, so it is 56 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 3,404 vehicles a day, roughly 23% of them trucks, projected to reach 4,766 by 2043. The structure is 275 ft (83.7 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
LocationCheyenne - Chugwater
RouteInterstate 25
CountyPlatte County
StateWyoming
Coordinates41.75029, -104.8316
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.3 US tons
Inventory rating37.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length275 ft (83.7 m)
Longest span90 ft (27.4 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,404 (2024)
Projected traffic4,766 by 2043
Trucks23%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad and waterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-25 Sbl over BNSF Railway built?

It was built in 1969, making it 56 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 2024.

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

About 3,404 vehicles per day (2024 count), of which roughly 23% are trucks.

How long is I-25 Sbl over BNSF Railway?

The structure is 275 ft (83.7 m) long with a longest span of 90 ft (27.4 m) and a deck 41 ft wide.

Who owns I-25 Sbl over BNSF Railway?

It is owned by the State Highway Agency.