US Bridges

Wyo 320 over Wheatland Creek

FairPosted for load

Platte County, Wyoming · Wheatland - JCT US 26 · Structure no. CNI

Built
1956
69 years old
Condition
Fair
inspected April 2024
Type
Slab
Concrete Continuous
Length
127 ft
5 main spans
Daily traffic
2,248
2024 count
Owner
State
State Highway Agency

About this bridge

Wyo 320 over Wheatland Creek is a concrete continuous slab carrying Wyo 320 over Wheatland Creek in Platte County, Wyoming. It was built in 1956, so it is 69 years old, older 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 2,248 vehicles a day, roughly 9% of them trucks, projected to reach 3,147 by 2043. The structure is 127 ft (38.6 m) long and 35 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesWyo 320
CrossesWheatland Creek
LocationWheatland - JCT US 26
RouteState Highway 320
CountyPlatte County
StateWyoming
Coordinates42.08469, -104.95162
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.5 US tons
Inventory rating28.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length127 ft (38.6 m)
Longest span27 ft (8.1 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,248 (2024)
Projected traffic3,147 by 2043
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

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 320 over Wheatland Creek built?

It was built in 1956, making it 69 years old in 2025.

What condition is Wyo 320 over Wheatland 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 April 2024.

How much traffic does Wyo 320 over Wheatland Creek carry?

About 2,248 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is Wyo 320 over Wheatland Creek?

The structure is 127 ft (38.6 m) long with a longest span of 27 ft (8.1 m) and a deck 35 ft wide.

Who owns Wyo 320 over Wheatland Creek?

It is owned by the State Highway Agency.