Wyo 320 over North Laramie River
FairPlatte County, Wyoming · Wheatland-Dwyer Jct. · Structure no. FFM
- Built
- 1986
- 39 years old
- Condition
- Fair
- inspected January 2025
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 182 ft
- 3 main spans
- Daily traffic
- 569
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Wyo 320 over North Laramie River is a steel continuous stringer/multi-beam or girder carrying Wyo 320 over North Laramie River in Platte County, Wyoming. It was built in 1986, so it is 39 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 569 vehicles a day, roughly 9% of them trucks, projected to reach 797 by 2043. The structure is 182 ft (55.5 m) long and 39 ft wide. If it were closed, the detour would be 3.1 mi (5 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Wyo 320 over North Laramie River built?
It was built in 1986, making it 39 years old in 2025.
What condition is Wyo 320 over North Laramie River 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 January 2025.
How much traffic does Wyo 320 over North Laramie River carry?
About 569 vehicles per day (2024 count), of which roughly 9% are trucks.
How long is Wyo 320 over North Laramie River?
The structure is 182 ft (55.5 m) long with a longest span of 71 ft (21.6 m) and a deck 39 ft wide.
Who owns Wyo 320 over North Laramie River?
It is owned by the State Highway Agency.