US 20 over Phyllis Canal
GoodAda County, Idaho · 9.6 E. Caldwell · Structure no. 000000000012256
- Built
- 2023
- 2 years old
- Condition
- Good
- inspected June 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 47 ft
- 1 main span
- Daily traffic
- 19,500
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 20 over Phyllis Canal is a prestressed concrete box beam or girders - multiple carrying US 20 over Phyllis Canal in Ada County, Idaho. It was built in 2023, so it is 2 years old, younger than the Idaho average of 45.3 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 19,500 vehicles a day, roughly 6% of them trucks, projected to reach 29,250 by 2042. The structure is 47 ft (14.2 m) long and 188 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 9 Excellent | No problems noted. |
| Superstructure | 9 Excellent | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 20 over Phyllis Canal built?
It was built in 2023, making it 2 years old in 2025.
What condition is US 20 over Phyllis Canal 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 June 2024.
How much traffic does US 20 over Phyllis Canal carry?
About 19,500 vehicles per day (2023 count), of which roughly 6% are trucks.
How long is US 20 over Phyllis Canal?
The structure is 47 ft (14.2 m) long with a longest span of 44 ft (13.5 m) and a deck 188 ft wide.
Who owns US 20 over Phyllis Canal?
It is owned by the State Highway Agency.