US Bridges

Wyo 120 over Shoshone River

Fair

Park County, Wyoming · Cody-Montana State Line · Structure no. FUV

Built
1991
34 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
496 ft
3 main spans
Daily traffic
3,677
2024 count
Owner
State
State Highway Agency

About this bridge

Wyo 120 over Shoshone River is a steel continuous stringer/multi-beam or girder carrying Wyo 120 over Shoshone River in Park County, Wyoming. It was built in 1991, so it is 34 years old, younger 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 3,677 vehicles a day, roughly 7% of them trucks, projected to reach 5,148 by 2043. The structure is 496 ft (151.2 m) long and 70 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

Location

Open in Google Maps
CarriesWyo 120
CrossesShoshone River
LocationCody-Montana State Line
RouteState Highway 120
CountyPark County
StateWyoming
Coordinates44.53442, -109.0626
Functional classRural Principal Arterial - Other

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 protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating63.1 US tons
Inventory rating38 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length496 ft (151.2 m)
Longest span189 ft (57.6 m)
Deck width70 ft (21.3 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,677 (2024)
Projected traffic5,148 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed31.1 mi (50 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$4,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Wyo 120 over Shoshone River built?

It was built in 1991, making it 34 years old in 2025.

What condition is Wyo 120 over Shoshone 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 June 2024.

How much traffic does Wyo 120 over Shoshone River carry?

About 3,677 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is Wyo 120 over Shoshone River?

The structure is 496 ft (151.2 m) long with a longest span of 189 ft (57.6 m) and a deck 70 ft wide.

Who owns Wyo 120 over Shoshone River?

It is owned by the State Highway Agency.