US 20 over Niobrara River
FairNiobrara County, Wyoming · Lusk Streets 3rd Street · Structure no. LJA
- Built
- 2003
- 22 years old
- Condition
- Fair
- inspected January 2025
- Type
- Culvert
- Concrete Continuous
- Length
- 55 ft
- 4 main spans
- Daily traffic
- 754
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
US 20 over Niobrara River is a concrete continuous culvert carrying US 20 over Niobrara River in Niobrara County, Wyoming. It was built in 2003, so it is 22 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 754 vehicles a day, roughly 18% of them trucks, projected to reach 1,056 by 2043. The structure is 55 ft (16.8 m) long and 67 ft wide. If it were closed, the detour would be 67.1 mi (108 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 |
|---|---|---|
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 20 over Niobrara River built?
It was built in 2003, making it 22 years old in 2025.
What condition is US 20 over Niobrara 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 US 20 over Niobrara River carry?
About 754 vehicles per day (2024 count), of which roughly 18% are trucks.
How long is US 20 over Niobrara River?
The structure is 55 ft (16.8 m) long with a longest span of 12 ft (3.7 m) and a deck 67 ft wide.
Who owns US 20 over Niobrara River?
It is owned by the State Highway Agency.