US Bridges

Wyo 450 over Mush Creek

Fair

Weston County, Wyoming · Newcastle-Clareton Road · Structure no. FLW

Built
1989
36 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
90 ft
3 main spans
Daily traffic
765
2024 count
Owner
State
State Highway Agency

About this bridge

Wyo 450 over Mush Creek is a steel continuous stringer/multi-beam or girder carrying Wyo 450 over Mush Creek in Weston County, Wyoming. It was built in 1989, so it is 36 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 765 vehicles a day, roughly 40% of them trucks, projected to reach 1,071 by 2043. The structure is 90 ft (27.4 m) long and 39 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesWyo 450
CrossesMush Creek
LocationNewcastle-Clareton Road
RouteState Highway 450
CountyWeston County
StateWyoming
Coordinates43.78969, -104.42171
Functional classRural Minor Arterial

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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length90 ft (27.4 m)
Longest span35 ft (10.7 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic765 (2024)
Projected traffic1,071 by 2043
Trucks40%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Wyo 450 over Mush Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is Wyo 450 over Mush Creek 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 2024.

How much traffic does Wyo 450 over Mush Creek carry?

About 765 vehicles per day (2024 count), of which roughly 40% are trucks.

How long is Wyo 450 over Mush Creek?

The structure is 90 ft (27.4 m) long with a longest span of 35 ft (10.7 m) and a deck 39 ft wide.

Who owns Wyo 450 over Mush Creek?

It is owned by the State Highway Agency.