US Bridges

Wyo 338 over Ash Creek

Fair

Sheridan County, Wyoming · Sheridan-Mont. Line · Structure no. FSC

Built
1989
36 years old
Condition
Fair
inspected June 2024
Type
Culvert
Steel
Length
29 ft
2 main spans
Daily traffic
915
2024 count
Owner
State
State Highway Agency

About this bridge

Wyo 338 over Ash Creek is a steel culvert carrying Wyo 338 over Ash Creek in Sheridan 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 915 vehicles a day, roughly 4% of them trucks, projected to reach 1,281 by 2043. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 98.8 mi (159 km).

CarriesWyo 338
CrossesAsh Creek
LocationSheridan-Mont. Line
RouteState Highway 338
StateWyoming
Coordinates44.94997, -106.94282
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
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
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length29 ft (8.8 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic915 (2024)
Projected traffic1,281 by 2043
Trucks4%
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 338 over Ash Creek built?

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

What condition is Wyo 338 over Ash 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 June 2024.

How much traffic does Wyo 338 over Ash Creek carry?

About 915 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is Wyo 338 over Ash Creek?

The structure is 29 ft (8.8 m) long with a longest span of 12 ft (3.7 m).

Who owns Wyo 338 over Ash Creek?

It is owned by the State Highway Agency.