US Bridges

Wyo 220 over Casper Canal

Poor

Natrona County, Wyoming · Muddy Gap Jct-Wyo 487 JCT · Structure no. BUG

Built
1967
58 years old
Condition
Poor
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
84 ft
1 main span
Daily traffic
3,090
2024 count
Owner
State
State Highway Agency

About this bridge

Wyo 220 over Casper Canal is a steel stringer/multi-beam or girder carrying Wyo 220 over Casper Canal in Natrona County, Wyoming. It was built in 1967, so it is 58 years old, older than the Wyoming average of 48.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 3,090 vehicles a day, roughly 20% of them trucks, projected to reach 4,326 by 2043. The structure is 84 ft (25.6 m) long and 47 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesWyo 220
CrossesCasper Canal
LocationMuddy Gap Jct-Wyo 487 JCT
RouteState Highway 220
CountyNatrona County
StateWyoming
Coordinates42.56063, -106.73851
Functional classRural Principal Arterial - Other

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length84 ft (25.6 m)
Longest span80 ft (24.3 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,090 (2024)
Projected traffic4,326 by 2043
Trucks20%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemYes

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 Wyo 220 over Casper Canal built?

It was built in 1967, making it 58 years old in 2025.

What condition is Wyo 220 over Casper Canal in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2024.

How much traffic does Wyo 220 over Casper Canal carry?

About 3,090 vehicles per day (2024 count), of which roughly 20% are trucks.

How long is Wyo 220 over Casper Canal?

The structure is 84 ft (25.6 m) long with a longest span of 80 ft (24.3 m) and a deck 47 ft wide.

Who owns Wyo 220 over Casper Canal?

It is owned by the State Highway Agency.