US 20; I 84B over Boise River;broadway Br
FairAda County, Idaho · In Boise; Broadway Ave · Structure no. 000000000012271
- Built
- 2016
- 9 years old
- Condition
- Fair
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 472 ft
- 4 main spans
- Daily traffic
- 28,000
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
US 20; I 84B over Boise River;broadway Br is a steel continuous stringer/multi-beam or girder carrying US 20; I 84B over Boise River;broadway Br in Ada County, Idaho. It was built in 2016, so it is 9 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 28,000 vehicles a day, roughly 3% of them trucks, projected to reach 42,000 by 2042. The structure is 472 ft (143.9 m) long and 108 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 8 Very Good | 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; I 84B over Boise River;broadway Br built?
It was built in 2016, making it 9 years old in 2025.
What condition is US 20; I 84B over Boise River;broadway Br 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 September 2024.
How much traffic does US 20; I 84B over Boise River;broadway Br carry?
About 28,000 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is US 20; I 84B over Boise River;broadway Br?
The structure is 472 ft (143.9 m) long with a longest span of 135 ft (41.1 m) and a deck 108 ft wide.
Who owns US 20; I 84B over Boise River;broadway Br?
It is owned by the State Highway Agency.