US 20 over South Fork Casper Creek
GoodNatrona County, Wyoming · Casper - Shoshoni · Structure no. CBL
- Built
- 1976
- 49 years old
- Condition
- Good
- inspected April 2023
- Type
- Tee Beam
- Concrete Continuous
- Length
- 112 ft
- 3 main spans
- Daily traffic
- 2,931
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
US 20 over South Fork Casper Creek is a concrete continuous tee beam carrying US 20 over South Fork Casper Creek in Natrona County, Wyoming. It was built in 1976, so it is 49 years old, older 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 2,931 vehicles a day, roughly 16% of them trucks, projected to reach 4,103 by 2043. The structure is 112 ft (34.1 m) long and 43 ft wide. If it were closed, the detour would be 98.8 mi (159 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| 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 US 20 over South Fork Casper Creek built?
It was built in 1976, making it 49 years old in 2025.
What condition is US 20 over South Fork Casper Creek 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 April 2023.
How much traffic does US 20 over South Fork Casper Creek carry?
About 2,931 vehicles per day (2024 count), of which roughly 16% are trucks.
How long is US 20 over South Fork Casper Creek?
The structure is 112 ft (34.1 m) long with a longest span of 43 ft (13.1 m) and a deck 43 ft wide.
Who owns US 20 over South Fork Casper Creek?
It is owned by the State Highway Agency.