US Bridges

US 20 over Big Horn Canal

Good

Washakie County, Wyoming · Worland South · Structure no. LVK

Built
2006
19 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
2,768
2024 count
Owner
State
State Highway Agency

About this bridge

US 20 over Big Horn Canal is a steel stringer/multi-beam or girder carrying US 20 over Big Horn Canal in Washakie County, Wyoming. It was built in 2006, so it is 19 years old, younger than the Wyoming average of 48.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,768 vehicles a day, roughly 14% of them trucks, projected to reach 3,875 by 2043. The structure is 40 ft (12.2 m) long and 44 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesUS 20
CrossesBig Horn Canal
LocationWorland South
RouteU.S. Route 20
StateWyoming
Coordinates44.00623, -107.98367
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating88 US tons
Inventory rating52 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length40 ft (12.2 m)
Longest span37 ft (11.4 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,768 (2024)
Projected traffic3,875 by 2043
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

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 US 20 over Big Horn Canal built?

It was built in 2006, making it 19 years old in 2025.

What condition is US 20 over Big Horn Canal in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2024.

How much traffic does US 20 over Big Horn Canal carry?

About 2,768 vehicles per day (2024 count), of which roughly 14% are trucks.

How long is US 20 over Big Horn Canal?

The structure is 40 ft (12.2 m) long with a longest span of 37 ft (11.4 m) and a deck 44 ft wide.

Who owns US 20 over Big Horn Canal?

It is owned by the State Highway Agency.