US 20 Wbl & Ebl over Boise River
FairAda County, Idaho · In Boise;boise Connector · Structure no. 000000000012263
- Built
- 1990
- 35 years old
- Condition
- Fair
- inspected February 2021
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 597 ft
- 4 main spans
- Daily traffic
- 37,500
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 20 Wbl & Ebl over Boise River is a prestressed concrete continuous box beam or girders - multiple carrying US 20 Wbl & Ebl over Boise River in Ada County, Idaho. It was built in 1990, so it is 35 years old, younger than the Idaho average of 45.3 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 37,500 vehicles a day, roughly 4% of them trucks, projected to reach 56,250 by 2042. The structure is 597 ft (182 m) long and 123 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 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 Wbl & Ebl over Boise River built?
It was built in 1990, making it 35 years old in 2025.
What condition is US 20 Wbl & Ebl over Boise 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 February 2021.
How much traffic does US 20 Wbl & Ebl over Boise River carry?
About 37,500 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is US 20 Wbl & Ebl over Boise River?
The structure is 597 ft (182 m) long with a longest span of 162 ft (49.4 m) and a deck 123 ft wide.
Who owns US 20 Wbl & Ebl over Boise River?
It is owned by the State Highway Agency.