US Bridges

I-90 Wbl over Lake De Smet Ditch

Fair

Johnson County, Wyoming · Sheridan - Buffalo · Structure no. BCQ

Built
1966
59 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
133 ft
3 main spans
Daily traffic
3,740
2024 count
Owner
State
State Highway Agency

About this bridge

I-90 Wbl over Lake De Smet Ditch is a steel continuous stringer/multi-beam or girder carrying I-90 Wbl over Lake De Smet Ditch in Johnson County, Wyoming. It was built in 1966, so it is 59 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 3,740 vehicles a day, roughly 18% of them trucks, projected to reach 5,236 by 2043. The structure is 133 ft (40.5 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
CrossesLake De Smet Ditch
LocationSheridan - Buffalo
RouteInterstate 90
CountyJohnson County
StateWyoming
Coordinates44.52256, -106.80107
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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 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 rating56.1 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 length133 ft (40.5 m)
Longest span51 ft (15.5 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,740 (2024)
Projected traffic5,236 by 2043
Trucks18%
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 Lake De Smet Ditch built?

It was built in 1966, making it 59 years old in 2025.

What condition is I-90 Wbl over Lake De Smet Ditch 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 August 2023.

How much traffic does I-90 Wbl over Lake De Smet Ditch carry?

About 3,740 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is I-90 Wbl over Lake De Smet Ditch?

The structure is 133 ft (40.5 m) long with a longest span of 51 ft (15.5 m) and a deck 41 ft wide.

Who owns I-90 Wbl over Lake De Smet Ditch?

It is owned by the State Highway Agency.