US Bridges

I-90 Wbl over Powder River

Fair

Johnson County, Wyoming · Buffalo - Gillette · Structure no. BEU

Built
1961
64 years old, rebuilt 1991
Condition
Fair
inspected April 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
525 ft
3 main spans
Daily traffic
1,834
2024 count
Owner
State
State Highway Agency

About this bridge

I-90 Wbl over Powder River is a steel continuous girder and floorbeam system carrying I-90 Wbl over Powder River in Johnson County, Wyoming. It was built in 1961 and reconstructed in 1991, so it is 64 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 1,834 vehicles a day, roughly 19% of them trucks, projected to reach 2,568 by 2043. The structure is 525 ft (159.9 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-90 Wbl
CrossesPowder River
LocationBuffalo - Gillette
RouteInterstate 90
CountyJohnson County
StateWyoming
Coordinates44.21424, -106.15371
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating58.3 US tons
Inventory rating34.9 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length525 ft (159.9 m)
Longest span200 ft (61 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,834 (2024)
Projected traffic2,568 by 2043
Trucks19%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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-90 Wbl over Powder River built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1991.

What condition is I-90 Wbl over Powder River 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-90 Wbl over Powder River carry?

About 1,834 vehicles per day (2024 count), of which roughly 19% are trucks.

How long is I-90 Wbl over Powder River?

The structure is 525 ft (159.9 m) long with a longest span of 200 ft (61 m) and a deck 41 ft wide.

Who owns I-90 Wbl over Powder River?

It is owned by the State Highway Agency.