US 20 over Middle Fork Casper Creek
FairNatrona County, Wyoming · Casper-Shoshoni · Structure no. EWL
- Built
- 1984
- 41 years old
- Condition
- Fair
- inspected March 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 126 ft
- 3 main spans
- Daily traffic
- 2,931
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
US 20 over Middle Fork Casper Creek is a steel continuous stringer/multi-beam or girder carrying US 20 over Middle Fork Casper Creek in Natrona County, Wyoming. It was built in 1984, so it is 41 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 5 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 2,931 vehicles a day, roughly 16% of them trucks, projected to reach 4,103 by 2043. The structure is 126 ft (38.4 m) long and 43 ft wide. If it were closed, the detour would be 80.2 mi (129 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 Middle Fork Casper Creek built?
It was built in 1984, making it 41 years old in 2025.
What condition is US 20 over Middle Fork Casper 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 March 2024.
How much traffic does US 20 over Middle Fork Casper Creek carry?
About 2,931 vehicles per day (2024 count), of which roughly 16% are trucks.
How long is US 20 over Middle Fork Casper Creek?
The structure is 126 ft (38.4 m) long with a longest span of 49 ft (14.9 m) and a deck 43 ft wide.
Who owns US 20 over Middle Fork Casper Creek?
It is owned by the State Highway Agency.